Inborn errors of metabolism

Inborn errors of metabolism 1.0 Abstract Inborn errors of metabolism occurs 1 in 5000 births collectively. They can be treated if the inborn error is diagnosed properly and early. They are manly caused by a gene defect that blocks vital metabolic pathways. The can be server, which is mainly due to amount of enzymes that is causing the block or deficiency of the reaction product. This can affect the organs and also have local effect such as lysosomal storage disease. The symptoms can vary, from mild to severe. They affect any organs and occur at any time. To recognise the Inborn Errors of Metabolism, the doctor must be suspicious; for example a baby that show signs of antecedent maternal fever should undergo a blood culture and also undergo simple tests such as Amino acids, Organic acids, Glucose, Electrolytes, Lactate, and Ammonia; which is done in the laboratory. 2.0 Abstract Inborn errors of metabolism (IEM) are a group of genetic disorders that are rare. These disorders are genetic diseases that are involved in metabolism disorders. A large section of these disorders arise from single genes that encodes for enzymes; that have been defective. These enzymes are important that they catalyses chemical reactions converting substrates to products essential for everyday living. Inborn errors of metabolism disorders can arise from a number of conditions such as prolong exposure and accumulation of substances which are toxic, and the interference of normal functions and the inability to produce and synthesize essential compounds. Inborn errors of metabolism has related to defects in or damage to a developing foetus that may have been caused to genetic changes, that is why Inborn errors of metabolism is sometimes referred as congenital metabolic diseases. Inborn errors of metabolism have also been linked to heritable disorders within biochemistry, for example phe nylketonuria (PKU). That is why some times it is referred as inherited metabolic diseases as well. In the perspective of changes of normal mechanical, physical, and biochemical functions, IEM can divided into three useful groups that can be analysed diagnostically. Group 1: Disorders which causes intoxication. Group 2: Disorders involving energy metabolism. And Group 3: Disorders involving complex molecules. 1.0 Introduction 1.1 Inborn Errors of Metabolism In the early 1900s, a researcher called Sir Archibald Garrods based his studies on genetic metabolic disorders and discovered IEM [1, 2]. He was known for his work on the one gene, one enzyme hypothesis, based on his studies on the nature and inheritance of alkaptonuria. And gave the name and wrote a book on IEM (The Incidence of Alkaptonuria: a Study in Chemical Individuality.) [1, 2]. IEM can arise from a number of causes, but the major cause is alteration of a specific metabolic reaction [1, 2]. IEM has been shown to develop at a very young age, where epidemiology findings indicated that hundreds of IEM affects about 1 in every 5000 born babies [2]. But as technology advances and improved techniques such as metabolomics, has been easy to develop newborn screening that improves early diagnosis and treatment in a number of IEM disorders [2]. But as these new techniques cost a lot to run and time increases, proving to be unreliable [2]. The study and the knowledge about inborn errors of metabolism (IEM) have improved due to the latest advancement in technology and techniques [2, 3]. These improvement have led us to the conclusion, for example urea cycle disorders and organic acidemias may and will lead to the accumulation of ammonia, which is a toxic product of amino acid metabolism [2, 3]. Also the latest findings are that inborn errors of metabolism (IEM) may impair brain function due to defects in the mitochondrial respiratory chain and disorders in gluconeogenesis [4]. There are 10 facts that need to take inconsideration when people with IEM undergo clinical diagnosis [5]. Common condition such as, intoxication, encephalitis and brain tumours in older patients and also sepsis have to be analysed properly and always consider IEM in the same field [5]. Symptom that persists and that are unexplained even before, during and after initial treatment and usual investigations has been performed, have to be taken to consideration that it could be IEM [5]. Newborn babies that have organ dysfunction, hypo-perfusion, or hypotension can develop sepsis, which can be caused by IEM. So any babies in neonatal intensive care unit that die, the first cause that has to be taken to account is IEM [5]. Have to take extra care in reviewing all autopsy findings [5]. The examiner must not confuse a symptom for example peripheral neuropathy; or syndrome such as sudden infant death with etiology [5]. IEM can develop and present at any age, for example from foetal life to old age [5]. The examiner must take to account that not all genetic metabolic errors causes are due to hereditary and transmitted recessive disorders, but a large section of individual cases are sporadic [5]. Always consider inborn errors of metabolism are open to treatment for example with patients that have inborn errors of metabolism due to intoxication [5]. In server situations, the examiner will need to take a few patients with IEM that are able to diagnose and treat the patient with IEM [5]. The examiner must be open to obtain help from specialised centres that specialise with IEM [5]. The metabolic disorders can be set into three useful groups that can easily be distinguished from each other [5, 6, 7]. These three groups are sorted from a pathophysiological point of view [5, 6, 7]. The groups are; Group 1: Disorders which is caused by intoxication [5, 6, 7]. Group 2: Disorders involving energy metabolism [5, 6, 7]. And Group 3: Disorders involving complex molecules [5, 6, 7]. 1.2 Group 1- Disorders which is caused by intoxication In this group, it describes inborn errors of intermediary metabolism. These inborn errors cause acute of progressive intoxication from long exposure and increase of toxic compounds, forming a metabolic block [5, 6, 7]. In group 1 the inborn errors are manly amino acid catabolism [5, 6, 7]. These include phenylketonuria, where there is a deficiency in the enzyme phenylalanine hydroxylase (PAH); which is needed to metabolise the amino acid phenylalanine to the amino acid tyrosine [5, 6, 7]. Homocystinuria is an inherited disorder of the metabolism of methionine [5, 6, 7]. Tyrosinemia is where body cannot break down the amino acid tyrosine [5, 6, 7]. Also organic acidurias such as methylmalonic acidemia, and propionic acidemia [5, 6, 7]. Sugar intolerances are also classified in group 1 [5, 6, 7]. These include hereditary fructose intolerance caused by a deficiency of liver enzymes that metabolise fructose. Metal toxication also falls under group 1; such as hemochromatosis, where the patient has accumulated a lot of iron [5, 6, 7]. All these metabolic disorders have something in common, in that they do not affect the embryo development, and also show similar symptoms of clinical intoxication [5, 6, 7]. A patient with group 1 disorders may show an acute signs of vomiting, coma and liver failure; or chronic signs which are cardiomyopathy, developmental delay and failure to thrive. Acute symptoms that can worsen are catabolism, fever, and food intake [5, 6, 7]. The analysis in group 1 is easy, and without any complications [5, 6, 7]. It needs the use of chromatography in which the plasma and urine amino acid. Most of group 1 disorders are treatable. Treatment is usually involves special diets and cleansing drugs such as sodium benzoate and penicillamine, to remove the toxins [5, 6, 7]. The inborn error of amino acid synthesis is also included to this group, as they have the same or similar features [7, 8]. They are inborn errors of intermediary metabolism; the analysis requires the plasma and urine where disorders are able to be treated even when the disorder starts with in the uterus, for example 3-phosphoglycerate dehydrogenase deficiency [5, 6, 7, 8]. 1.3 Group 2- Disorders involving energy metabolism In this group inborn errors are errors of intermediary metabolism as well. The symptoms are mainly caused by a lack of energy production or utilization. This will involve the liver, myocardium, muscle, and brain [5, 6, 7]. There are two types of disorders involving energy metabolism. 1. involves mitochondrial energy defects. 2. involves cytoplasmic energy defects [5, 6, 7]. Mitochondrial energy defects are more aggressive and are not fully treatable [5, 6, 7]. Mitochondrial energy defects cause lactic acidemias where there is dextrorotatory lactic acid in the circulating blood, resulting to defects of the pyruvate transporter resulting to PKU, pyruvate carboxylase this causes lactic acid to accumulate in the blood, pyruvate dehydrogenase where the patient can show symptoms of severe lethargy, and defects in the Krebs cycle [5, 6, 7]. But some defects such as fatty acid oxidation and ketone body defects are partly treatable [5, 6, 7]. Cytoplasmic energy defects are not as much aggressive then mitochondrial energy defects. A cytoplasmic energy defect causes disorders of glycolysis, glycogen metabolism and gluconeogenesis [5, 6, 7]. And recent study showed it causes disorders of creatine metabolism which it is partly treatable by oral creatine supplementation [5, 6, 7]. Cytoplasmic energy defects can cause disorders that are untreatable, such as errors of the pentose phosphate pathway which will be described in further details [5, 6, 7]. In group 2, the common symptoms are heart muscle disease, hypoglycaemia, myopathy which is a muscular disease, cardiac failure, specific failure of the circulation, sudden death especially in infancy [5, 6, 7]. Mitochondrial disorders and as well as the pentose phosphate pathway defects can obstruct embryo-foetal development and give rise to dysmorphism, dysplasia causing an abnormality in maturation of cells within a tissue and congenital disorder [5, 6, 7, 9]. The analysis and the diagnosis are hard to put through as it requires 4 different tests [5, 6, 7]. 1. Function tests [5, 6, 7]. 2. Enzymatic analyses needing biopsies [5, 6, 7]. 3. Cell culture [5, 6, 7]. 4. Molecular analyses [5, 6, 7]. 1.4 Group 3- Disorders involving complex molecules. Group 3 involves cellular organelles [5, 6, 7]. The diseases that fall under group 3 modify the synthesis or the catabolism of complex molecules [5, 6, 7]. There are symptoms that are permanent and progressive, and some symptoms free from intercurrent events [5, 6, 7]. In this group there are disorders such as lysosomal storage disorders, peroxisomal disorders and inborn errors of cholesterol synthesis etc. In this group treatment is difficult would need enzyme replacement therapy, especially for lysosomal disorders [5, 6, 7, 10]. 2.0 General Symptoms and Signs There is a way for testing newborn babies for inborn errors [11]. This process is called Newborn screening. This tests babies at a very early age for four types of diseases that are treatable: genetic, endocrinologic, metabolic and hematologic diseases [11]. Dr Robert Guthrie was a microbiologist who designed a dried blood spot testing, and used it to screen for phenylketonuria [12]. To this present day that spotting test is still being used. As techniques have improved so have the screening [12]. A physician who is screening a newborn baby for a metabolic disorder has follow four groups of clinical circumstances: The physician must find early symptoms, especially in the antenatal and neonatal period of development. In the later stages the physician must find symptoms that are server and recurring. Symptoms such as coma and vomiting. If the physician finds any symptoms that are chronic and aggressive, they could be due to three things: 1) Gastrointestinal. 2) Muscular. 3) Neurological. These will be described in more detail below The physician must find any signs of cardiomyopathy, hepatomegaly etc. This could lead to organ failures. The three groups have symptoms that are chronic and aggressive that can be easily ignored or misinterpreted. 2.1 Gastrointestinal Symptoms. If a patient has inborn errors of metabolism (IEM), the person might have symptoms that fall under the Gastrointestinal Symptoms (GI) group [13]. These symptoms include Anorexia, which is an eating disorder [5, 13]. Osteoporosis which untreated could lead to bones fracturing. Chronic vomiting, feeding difficulties, and failure to thrive are also symptoms of (GI). But they are also associated with chronic diarrhoea [5, 13]. This could lead to false and the wrong diagnosis [5, 13]. There are two groups that have been described to have caused chronic diarrhoea and failure to thrive within inborn errors of metabolism: These disorders include errors of the intestinal mucosa or the exocrine function of the pancreas, for example congenital chloride diarrhoea, glucose- galactose malabsorption a condition in which the cells lining the intestine cannot take in the sugars. Lactase and sucrose-isomaltase deficiencies where the person is unable to metabolise lactose or sucrose. Abetalipoproteinemia type II disorder that interferes with the normal absorption of fat and fat-soluble vitamins from food [5, 13]. Enterokinase deficiency; Enterokinase is an enzyme involved in human digestion. Acrodermatitis enteropathica, a condition that affects that absorption of Zinc. Etc [5, 13]. Systemic disorders such as diabetes mellitus, diabetes, sickle cell disease, sarcoidosis, etc can also give rise to GI abnormalities. A problem has risen in distinguishing systemic abnormalities and inborn error of metabolism and vice versa [5, 13]. 2.2 Muscle Symptoms. There are a number of symptoms that fall under this group. For example: Hypotonia, where there is a disorder that causes low muscle tone and strength [5, 14]. Muscular weakness and poor muscle mass [5, 14]. These symptoms are common with many inborn errors of metabolism. These symptoms can be caused by urea cycle defects and many amino acid metabolism disorders [5, 14]. Recent studies have shown that the cause of muscle symptoms can be due to mutations in the monocarboxylate transporter 8 gene, which can develop Allan-Herndon-Dudley syndrome [14]. Allan-Herndon-Dudley syndrome falls under the muscle symptoms group as it causes hypotonia, general weakness of the muscle, reduced muscle mass and delayed development [14]. Further studies showed that this X-linked mental retardation syndrome is involved in the transport of triiodothyronine into neurones and disrupts the blood levels of thyroid hormone [14]. 2.3 Neurological Symptoms. Patients with inborn errors often have neurological symptoms. These include of neurological abnormalities, in the central and peripheral system. Studies have shown that these neurological symptoms are very frequent with inborn errors [5, 15]. These symptoms include poor feeding, hypotonia, ataxia, and even autistic features [5, 15]. The analysis of inborn errors, due to the screening of neurological symptoms is very difficult due to symptoms that are non specific signs; sings that include for example developmental delay, and hypotonia [15]. 3.0 Screening Newborns for Inborn Error of Metabolism 3.1 Newborn screening Newborn screening is a technique, used to detect inborn errors [17, 12]. It was first used to detect phenylketonuria (PKU) by a bacterial inhibition assay, developed in the 1961 by Dr Robert Guthrie as already stated. His technique in using dried blood sample was further developed in the mid 1975, where a scientist called Dussault used a method to screening for congenital hypothyroidism [16]. A lot of time and money has been invested into the screening programme, and now they have uncovered new disorders that are related to inborn errors [17, 12]. Disorders such as cystic fibrosis, congenital adrenal hyperplasia, which is a form mutation of genes that produces enzymes that mediating production of cortisol from cholesterol by the adrenal glands. Glucose-6-phosphate dehydrogenase deficiency and many more [5]. To this present day, for screening newborns, tandem mass spectrometry is used [18]. It is a lot easier for screening and diagnosis. The application of tandem mass spectrometry to newborn screening was first described in 1990 [18]. The primary aim of newborn screening is to identify patients, manly infants with serious disorders that are treatable [18]. This will make it easy to prevent or improve clinical symptoms of the disease [18]. Tandem mass-spectrometry is very useful in detecting more than one disorder at one time [18]. This can be used to detect early untreatable disorders and also can be beneficial if the screening was not limited to just individual babies, but the whole family as well [18]. The screening process uses MSMS [18]. MSMS is the method used to measure analytes by both mass and structure [18]. First the compounds are ionised, where the first mass spectrometer selects the ion of interest, where it is sorted by weight [18]. Then the compounds travel through a collision cell, are dissociated to signature fragments, and then pass into a second mass spectrometer where ions are selected for detection. [18]. 3.2 Method for screening Research have been done where most newborn screening programmes use simplifying sample preparation, instead derivatisation of the sample which is the old method [18]. When investigating, the sample might show more than one disorder. But the use of ratio of analytes improves sensitivity and specificity [19]. Specialised biochemical genetic testing is always done to verify which type of disorder the patient has [18]. Theses genetic tests include amino acid analysis, organic acid analysis by gas chromatography/mass spectrometry, and plasma acylcarnitine profile by MSMS [18]. 4.0 Screening for Individual Inborn Errors of Metabolism Well over 40 inborn errors of metabolism can now be detected by newborn screening [20]. This section will look at three inborn errors. 4.1 Pentose Phosphate Pathway The pentose phosphate pathway (PPP) is an anabolic pathway where is uses a 6 carbon glucose to generate a 5 carbon sugars and reducing equivalents, as shown in Fig. 1. There are three primary functions of this pathway [21]: To generate reducing equivalents, such as NADP forming NADPH. NADPH allows reduction biosynthesis reactions to occur within cells [21]. To produce ribose-5-phosphate (R5P) for the cell, for the synthesis of the nucleotides and nucleic acids [21]. Can metabolise dietary pentose sugars that are derived from digestion of nucleic acids [21]. These also rearrange the carbon skeletons of dietary carbohydrates into glycolytic/gluconeogenic intermediates [21]. 4.1.1 Disorders of the Pentose Phosphate Pathway There are three inborn error in the pentose phosphate pathway that have been identified [21]. 4.1.2 Glucose-6-phosphate dehydrogenase deficiency The enzyme glucose-6-phosphate dehydrogenase (G6PDH), catalyses the reaction that converts glucose-6-phosphate to 6-phosphogluconate. This creates one mole of NADPH each for every mole of glucose-6-phosphate (G6P) that enters the PPP [21]. A deficiency would lead to an error to the first irreversible step of the pathway [21]. This would lead further to a lower production in NADPH, making the cell more acceptable to oxidative stress [21]. G6PDH is very important for Erythrocytes metabolism [21]. A deficiency could lead Individuals to nonimmune hemolytic anaemia which can be caused by, infection or exposure to certain medications or chemicals [21]. G6PDH deficiency is also linked to favism [21]. It is thought to be an X-linked recessive hereditary disease [21]. 4.1.3 Ribose-5-Phosphate Isomerase Deficiency A recent study have shown that a patient with of ribose-5-phosphate isomerise deficiency, had developed progressive leucoencephalopathy and, developmental and speech delay [21]. They did further studies using NMR and found that polyols ribitol and D-arabitol concentration was abnormal in body fluids [21, 22]. They did their studies on fibroblasts and found that the enzyme gene-sequence analysis showed a frame-shift and a missense mutation [22]. 4.1.31 Metabolic Derangement Ribose-5-phosphate isomerase deficiency would mean that the reversible reaction converting ribose-5-phosphate to ribulose-5-phosphate and vice versa will halt [22]. If there was no deficiency ribulose-5-phosphate would be converted to xylulose 5-phosphate, which will provide the substrates for transketolase and further conversion into glycolytic intermediates [22]. Studies have found that there are two mutant allele one from each parents that results in ribose-5-phosphate isomerise gene that causes the deficiency [22]. So it could be an autosomal recessive inheritance disorder [22]. The best way to do a diagnostic test for Ribose-5-phosphate isomerase deficiency would be to take a urine sample [22]. Polyols ribitol and D-arabitol would be analysed [22]. Also enzyme assay can be used to sequence the ribose-5-phosphate isomerise gene [22]. 4.1.4 Transaldolase Deficiency Some studies have been done where three unrelated families had Transaldolase deficiency [23]. One patient had aortic coarctation where the aorta narrows [23]. During the patients life they found that ammonia was rising. But neurological and intellectual development has been normal. Another patient had HELLP syndrome (hemolysis, elevated liver enzymes and low platelet count) [23, 24]. Children with transaldolase deficiency have been diagnosed have found that the development of intellectual and neurological showed no abnormalities [23, 24]. But there is a strong link to liver cirrhosis which results from increased cell death of hepatocytes and biliary epithelial cells [23, 24]. 4.1.41 Metabolic Derangement Transaldolase catalyses the reaction: Sedoheptulose 7-phosphate + glyceraldehyde 3-phosphate erythrose 4-phosphate + fructose 6-phosphate [59]. It is a reversible reaction in the pentose phosphate pathway. The deficiency lead to the accumulation of polyols derived from the pathway intermediates: erythritol, arabitol and ribitol [59]. Studies have shown that all patients were homozygous for these specific mutations, suggesting autosomal recessive inheritance [23, 24]. A simple urine test can be done to diagnose of transaldolase deficiency, mainly because there is a high concentration of arabitol and ribitol in urine. Also enzyme assay can be used to sequence the gene [23, 24]. Liver transplant would be the only option with patients that have severe liver cirrhosis [23, 24]. 4.2.0 Insulin secretion by the pancreatic ß-cell In the production of insulin glucose enters the ß-cell through a GLUT2 transporter where it is phosphorylated to glucose-6-phosphate by the enzyme glucokinase [58]. The enzyme is used as a control, where it monitors the level of glucose [58]. As blood glucose raises the rate of glucose metabolism also increases, where the cell will undergo glycolysis generating ATP [58]. This increase of ATP concentration causes K+ channels to close, making the membrane depolarised [58]. This depolarisation causes the voltage sensitive Ca2+ channels to open and Ca ions flood in, stimulating insulin secretion by exocytosis from storage granules; this is shown in Fig. 2. 4.2.1Persistent Hyperinsulinemic Hypoglycaemia Hyperinsulinism has been diagnoses in all ages but it is very common in childhood [25]. Persistent hyperinsulinemic hypoglycaemia (PHHI) is the one of the main cause of hypoglycaemia especially in young children. Patients who are older, that develop PHHI are due to pancreatic adenoma [25]. Hypoglycaemia when there is an overproduction of insulin by the ß-cells in the pancreas [25]. Hypoglycaemia can produce a variety of symptoms the most dangerous is brain damage which can lead to death, and that is why treatment is vital [25]. PHHI has two histopathological lesions that can be easily distinguished, making PHHI a heterogeneous disorder [25]. Focal hyperinsulinemic hypoglycaemia (FoPHHI) is caused by loss of heterozygosity which is a somatic event [25]. This causes focal adenomatous hyperplasia, which is a pancreatic lesion [25]. They are treated with pancreatectomy, where they surgically remove part of the pancreas. Diffuse hyperinsulinemic hypoglycaemia (DiPHHI) is also a heterogeneous disorder, in that fact that it is unable to encode for proteins needed for insulin secretion [25]. This can also be caused autosomal recessive and dominant genes which are rare [25]. Positron emission tomography (PET) is used to distinguish between focal and diffuse PHHI [25]. This gives a 3D image or picture of functional processes in the body [25]. Once a patient is diagnosed with PHHI, they are on treatment straight away with glucose and glucagon [25]. 4.2.12Metabolic Derangement Hyperinsulinemic hypoglycaemia is due to insulin hypersecretion by the pancreas [25]. The Action insulin causes a decrease in plasma glucose by inhibiting hepatic glucose release from glycogen and gluconeogenesis, and by increasing glucose uptake in muscle and fat [25]. PHHI is a disorder that is caused by a variety of defects, either in regulation of insulin secretion, unable to transcribe the enzymes needed of even a modified receptor [26]. For example diseases that can affect the ion channels like seizures [27, 28, 29]. Also lack of enzyme production of glucokinase (GK), and glutamate dehydrogenase (GDH) [30, 31]. Epidemiology has found that 1/50,000 patients are born with PHHI [32, 33]. Focal hyperinsulinemic hypoglycaemia is strongly linked to mutation of the sulfonylurea-receptor and the K+ channels, both used to depolarise the cell [32, 33]. Both are found to be located on the chromosome 11p15 [32, 33]. To identify these mutations they would need to be tested in a foetus or embryo before it is born. Sulfonylurea-receptor gene (SUR1) will not respond to diazoxide, which is used as a K+ channels activator [34]. Studies have found that a high activity of the enzyme glutamate dehydrogenase (GDH) has resulted to hyperinsulism/hyperammonemia syndrome. This would make sense as GDH is needed to produce insulin and this would impair detoxification of ammonia in the liver [31]. The enzyme glucokinase (GK) is also expressed highly, where the affinity is increased for glucose, causing high levels of insulin secretion [30]. 4.2.13 Diagnostic Tests Diagnostic of HI is easy, in the fact that, it can be indicated by the levels of glucose in the blood. Treatment varies from age [35]. Hyperammonemia should be treated as another disease, when a patient has PHHI, when treating hyperinsulism/hyperammonemia syndrome. This can be done by analysis of urine organic acids and plasma acylcarnitines [36]. Patients who show the FoPHHI can have lesion ranging from 2.5 to 7.5 mm in diameter [37, 38]. People who have DiPHHI found that there was ß-cells that were abnormal [39]. Pancreatic venous catheterization (PVS) and pancreatic arteriography have proven very useful in locating the site of insulin secretion [40, 41]. PVS procedure will have to able to maintain blood glucose level, which is between 2 and 3 mmol/l. Blood sample would then be taken from the pancreas to measure 3 things 1.plasma glucose, 2.insulin and 3.C-peptide levels [40, 41]. Studies have shown that people with FoPHHI tend to have high concentration of plasma insulin and C-peptide levels in some samples and low concentration in others [40, 41]. People who have DiPHHI tend to find that all their sample have high concentration of plasma insulin and C-peptide [40, 41]. The use of [18F]-labelled fluoro-L-DOPA whole-body positron emission tomography (PET), has proved to be very useful in detecting hyperfunctional islet pancreatic tissue, where this can be used on patients with focal lesion [42]. Recent studies have shown that a new technique have been use to locate focal lesion and separate focal from diffuse forms of HI; this is the tolbutamide test [44, 45]. 4.2.14 Treatment and Prognosis Brain damage can occur if you are hypoglycaemic, so treatment needs to be quick. Glucagon would be given, where the patient would have to take 1 to 2 mg per day if blood glucose levels are unstable [35]. To treat PHHI, diazoxide would be given, usually at a dose of 15-10 mg/kg/day depending on your age [35]. Normal blood glucose levels should be between 4 and 7 mmol/l, before and after a meal [56]. This could need to be check every time once taking diazoxide [35, 56]. Octreotide treatment, can also be used as it is a hormone inhibitor [46]. But a high could lead to a more severe hypoglycaemia, as it can inhibit glucagon and growth hormone [46]. Patients will find that after treatment with octreotide, they might vomit or have diarrhoea [46]. Calcium-channel blockers could be used, such as Lercanidipine and Pranidipine [46]. These treatments that have been mentioned are very effective in controlling blood sugar [46]. If a patient is diagnosed with FoPHHI, the treatment tends to be surgical as drugs are ineffective [46]. They would undergo pancreatectomy. This procedure has its risk as the patient might develop diabetes mellitus [46]. DiPHHI patients have been found to have large nuclei in the ß-cells [35, 47]. And patients with FoPHHI showed no abnormal s-cell nuclei but did show shrunken cytoplasm [49, 50]. 4.3 Glucose Transporter Deficiency Monosaccharides such as glucose and fructose have the properties of being hydrophilic [59]. The lipid bilayer has hydrophilic heads and hydrophobic tails, prevent polar molecule such as glucose from diffusing across the membrane [59, 60]. So transport mechanisms are needed. These are hydrophilic pores allowing polar molecules to diffuse in and out of the cell [59, 60]. There are two types of glucose transporters. 1. Sodium-dependent glucose transporters (SGLT), which have been found to be located in the small intestine and the proximal tubule [59, 60]. SGLT uses the difference in concentration of sodium to transport glucose [59, 60]. From high to low concentration of sodium causes the transport of glucose against its own concentration gradient [59, 60]. 2. Facilitative glucose transporters (GLUT), which has been found throughout the body, but manly in muscle and pancreas cells [59, 60]. These transporters transport glucose from high to low concentration [59, 60]. Studies have shown that there are four defects in the transport of monosaccharides [59, 60]. These defects can depend on where the transporters are located within the body and what they transport in and out of the cell [59, 60]. As already stated there are four defects. 1. SGLT2, which is found in renal tubulus cells that can cause renal glucosuria [59, 60]. 2. SGLT1, which is found in the intestine, which can cause glucose-galactose malabsorption [59, 60]. 3. GLUT2, a transporter that carries glucose to the liver kidneys and pancreas [59, 60]. 4. GLUT1 is important, in the fact that it carries glucose to the brain cell (neuron and glia cells)

The Danger of Texting and Driving

The Danger of Texting and Driving Texting and driving is a very dangerous thing to do. So many things can happen on the road that many people are not aware of. Keep that phone out of sight when driving, or turn it off so it wont be a distraction. Lets say your friend is driving and she constantly receives text messages, of course shes going to want to look at her phone and text back to whoever but she doesnt realize the minute she looked down to her phone she passed a red light and gets hit by a truck. All because her phone kept vibrating and she couldnt wait till she got home. Attempting to read or write text messages while operating a motor vehicle is extremely dangerous for everyone on the road. Texting while driving involves a person taking his or her eyes off the road and momentarily ignoring the task of controlling the vehicle. Allowing this to happen even for a few seconds can be disastrous. It all makes sense because we shouldnt have to text and drive and its always going to be a very risky thing to do. Alway s try to be safe on the road and for the others safety. More than one hundred texts a day is ridiculous, how can teenagers spend so much time on there phone and not get bored? well, from the research that has been made many teenagers dont even pay attention in school because there phone is a distraction tool. Many of them just go home and stay on there phone and be on social media doing whatever they do best. But, what people dont realize is what they say/do behind their phone screen? Most of the time teens are just texting about regular things that go on in life but thats not always. Texting can go in many directions. Such as cyber bullying, teens tend to do that a lot in example twitter, thats a big one. He/she can get a direct message or a public tweet and it can be harrassing but the person that is provoking it continues with the tweets and its getting out of hand. Nobody is trying to stop him/her and its making the victim very upset. With those many tweets/direct messages something bad can happen. So please stop the cyberbullying on whatever social media. Because nobody would ever want that happening to them so it is not okay to do it to other people to make yourself feel better. Make sure your teen understands that it isnt acceptable to spread rumors or bully someone through texting or any other means. Remind your teen that any text message he or she sends can be saved or forwarded to anyone else, so its important to use good judgment with every message. Its explaining how cyberbullying is not okay in many ways. As in, sending a lot of harassing or rumors about the person on either social media or through phone number. It is never okay to say hurtful things about the person and continue on spreading it around or even texting others about it constantly. So stop the continuous messaging about them and be yourself and let it go, dont draw yourself in to dram that isnt necessary. So, how can your teen know how many text messages are too many? Just by overdoing it makes him/her look bad. And this is how you can get super annoyed with a lot of messages just popping up on your phone. Two people are in a relationship but they are really mad at each other and there speaking terms arent so understanding to one another so the girl is being very over dramatic and keep sending ten messages at a time before the guy can even answer to one of the texts. But, what the girl doesnt know is that he is trying to help his mother with cleaning but with the girl sending so many text messages he isnt able to do what he is being told by his mom, so hes having to stop what he is doing to answer back to his girlfriend before she gets even more mad. And the guy is trying to explain that he cant text at the moment but the girl doesnt believe him and he gets super mad and says that he is done with her. And now the girl wishes she never over texted him every five minutes and she just de stroyed her own relationship. For many teens, texting is an essential way to communicate. A lack of maturity can get your teen into trouble when texting, though. Help your teen understand and avoid the risks associated with texting. As if over texting was the only thing that is ruining everything, because it practically is. Just try to talk it out in person and not be so crazy about sending so many text messages because it can ruin something you dont want it to ruin in many cases not just a relationship. Dont let texting interfere with your sleep. Youre always going to need sleep no matter what and texting shouldnt be the reason to stay up. Although many teens might want to stay up to text with their friends they are losing their sleep and it causes them to start falling asleep at school when they need to be awake or they start being super lazy when they dont have enough sleep. So as a teenager he/she will always have there phone at night to text with friends and what not, but its a school night and they have a game the following day and they arent rested enough. So how is he/she going to have a great performance at their game and how are they going to make it at school not having enough sleep? Well, the answer is they are not going to do well that day because lack of sleep constantly texting at night isnt going to help the teen get better the next day, its just going to make it harder for them to focus and play. Sleep is very important, always stay energized. Some research also sug gests that screen time before bedtime interferes with sleep. As a result, teens can experience lost sleep, difficulty falling asleep, poor sleep quality and daytime sleepiness. People should love to sleep, do not waste time to sleep to stay up with friends texting or playing video games. Sleeping is very important and its so unhealthy not getting at least eight hours of sleep, so turn off the phone and go to bed early to get a good night rest. Teens shouldnt be texting their friends, family more than twice because you dont know what situation they are in, so be patient and relax. Therefore, more than three text messages is way too many just let the person answer back and you would be good to go. Works Cited 800 texts in one week? Diaries of 3 smartphone addicts. CNN Wire, 5 Oct. 2012. Kids InfoBits, go.galegroup.com/ps/i.do?p=ITKEsw=wu=j020902v=2.1id=GALE%7CA304445832it=rasid=0d683b573b25ed7a48a9ba3fb7fc4e38. Accessed 7 Feb. 2017. Clinic, Mayo. Teen Texting: Help Your Teen Avoid the Risk . Mayo Clinic, Mayo Clinic, 29 July 2015,www.mayoclinic.org/healthy-lifestyle/tween-and-teen-health/in-depth/teen-texting/art-20046833 Stephanie Watson How Defensive Driving Works 5 October 2009.HowStuffWorks.com. 9 February 2017 Texting Distractions. Gale Student Resources in Context, Gale, 2013. Research in Context, go.galegroup.com/ps/i.do?p=MSICsw=wu=j020902v=2.1id=GALE%7CUQHLWC117728338it=rasid=b050cc214b4d769f9a590797f2bf49ea. Accessed 6 Feb. 2017.

Paul Cronan and New England Telephone Company Case Analysis Essay

Paul Cronan and New England Telephone Company Case Analysis Legal Case Analysis Facts: ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul Cronan was a long-term New England Telephone Company (NET) employee (1973 - 1986), assigned at South Boston. ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul was diagnosed with AIDS Related Complex (ARC) in 1985. ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul informed his supervisor about ARC when asked about his third request to leave work for a medical appointment (1985). ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul had a poor attendance history. His tardiness and medical appointments concerned his supervision. ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul was granted NET sickness benefits in June 1985. ?  Ã‚  Ã‚  Ã‚  Ã‚  Disparaging comments about Paul and AIDS were observed in NET restrooms (summer 1985). ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul obtained medical permission to return to work with NET, but his requests for transfer way from the South Boston dispatch center were not processed by his new supervisor (August 1885). ?  Ã‚  Ã‚  Ã‚  Ã‚  NET issues new AIDS policy (September 1985). ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul is hospitalized (September 1985), and receives a memo from NET offering to return him to his previous position with reasonable accommodation for limitations. ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul files suit against NET for ?privacy law violations? and ?discrimination? using Civil Liberties Union of Massachusetts (December 1985). ?  Ã‚  Ã‚  Ã‚  Ã‚  NET tried to move the case to Federal court and failed (January 1986). The court determined that neither federal law nor union contracts preempted Massachusetts state laws on discrimination and privacy. ?  Ã‚  Ã‚  Ã‚  Ã‚  NET informs Paul his illness benefits have run out and place him on long-term disability (June 1986). ?  Ã‚  Ã‚  Ã‚  Ã‚  Paul and NET settle out of court, including allowing Paul to return to work at Needham facility (October 1886). ?  Ã‚  Ã‚  Ã‚  Ã‚  AIDS awareness training provided to NET personnel at Needham by medical AIDS specialists before Paul comes back to work (October 1986). ?  Ã‚  Ã‚  Ã‚  Ã‚  On Paul?s first day back at NET Needham, he finds a hostile work environment and IBEW Local 2222 workers file a grievance over safety concerns related to exposure to AIDS (October 1986). ?  Ã‚  Ã‚  Ã‚  Ã‚  On Paul?s second day back to work, 29 of 39 employees refused to enter the NET Needham facility and walked off the job. Several of these employees made statements regarding their fear AIDS and discomfort around Cronan (October 1986). Critical Legal Issues: ?  Ã‚  Ã‚  Ã‚  Ã‚  Was Paul Cronan discriminated against on the basis of a handicap, AIDS? ?  Ã‚  Ã‚  Ã‚  Ã‚  Was AIDS/ARC a handicap? ?  Ã‚  Ã‚  ... ... a large sum of money to go away (the easy way out). ?  Ã‚  Ã‚  Ã‚  Ã‚  NET could have accommodated Paul immediately and used his services doing something that prevented or limited his contact with employees or other people. This may have been a breech of union contract. Judgement and Rationale: ?  Ã‚  Ã‚  Ã‚  Ã‚  Once errors were made and the damage was done, NET was best served by taking the actions they did in settling out of court with Paul Cronan. This minimized the extent of financial loss, and prevented further tarnishing their corporate image. In this case it was NETs responsibility to do the right thing from the beginning. ?  Ã‚  Ã‚  Ã‚  Ã‚   NET would have lost the legal battle in court. Section 504 of the Rehabilitation Act of 19732 clearly prohibits discrimination in employment against qualified individuals with a disability. Like the ADA, a qualified individual with a disability is a person who: (1) has a physical or mental impairment which ?substantially limits? one or more major life activities, (2) has a record of such impairment, or (3) is regarded as having such an impairment. In this case the court would likely have determined that AIDS and the perception of AIDS qualified it as a disability.

Isolation in Another Country :: Another Country

Isolation in Another Country Another Country is possibly the only novel of its time in which every character suffers from a feeling of isolation. All the main characters share in the feeling of isolation. Whether the character's isolation is a result of race, economic situation, or even sexual orientation, each character's life is affected. The feeling of isolation causes the characters to lose touch with reality. This isolation is evident in the story of Rufus. Rufus is a young black jazz musician who grew up in Harlem, a young Black man fighting " the system" to attain his dreams. Later in the novel, Rufus reveals his inner turmoil. Rufus feels isolated from society. He knows, yet is unable to accept, the racial barrier between himself and his only close friend, Vivaldo. Vivaldo is a true friend, but despite their friendship, Rufus has a constant feeling of resentment toward Vivaldo. Rufus is tormented by thoughts such as "No one dared look at Vivaldo, out with any girl whatever, the way they looked at me now;...This is because Vivaldo was white" (Baldwin 31). The racial isolation is compounded when Rufus breaks all family ties in order to sustain his interracial relationship. Knowing his family's open disapproval of interracial relationships, Rufus decides to leave his family and live with his girlfriend, Leona. Despite his deep love for Leona, her presence constantly reminds him of the barrier between them. She becomes, in his mind, a symbol of the society that oppressed him. She becomes a symbol of the things he could never obtain in life. As his life becomes consumed, he plunges into the depths of despair, committing horrendous crimes against his loved ones. Rufus refuses the help of his friends. He turns to life on the streets and eventually jumps off a bridge. Before Rufus's death, Baldwin narrates: His own loneliness, magnified so many million times, made the night air colder. He remembered to what excess, into what traps and nightmares, his loneliness had driven him; and he wondered where such a violent emptiness might drive an entire city. (60) Vivaldo, a close friend of Rufus, deals with his own form of isolation. A product of dysfunctional Brooklyn family, Vivaldo felt he was never loved; thus, he forces himself into loveless relationships. In these relationships he establishes a barrier between himself and his girlfriends. Vivaldo seems to be searching for love in all the wrong places--street corners and bars.

New vs Traditional Teaching Methods :: Education

Becoming a rational citizen is a process that involves a series of lessons which are created to guide every person to create strong foundations for self-judgment and reasoning. Therefore, it is very important to find the right way to send this essential information to the students in order to promote creativity and efficiency for the new generations which are considered the drive to innovation, social and economic growth (V. S.Damodharan & V. Rengarajan 07).In this case, the measure of efficiency in teaching besides the material presented, narrows down to the process used in the teaching system. Frankly speaking, if we consider the available methods for teaching today, the debate will definitely occur between the old schooling system versus the new schooling system. Being told what to do to get an A isn’t just an experience that my friends and I have had in our years in elementary school but it’s also the main characteristic of the so-called old schooling system. This teaching method emphasizes the theoretical part of learning and it is mostly considered as â€Å"copy-paste† learning. This terminology means that the material explained in class is the teacher’s notes or a book (Damodharan & Rengarajan 04), from the students it is expected to know that information word by word if they want to have a good grade. Since the lessons are teacher oriented mostly, the students are the passive party in the classroom and that leads to less interaction between students in class and no critical thinking for issues being presented. Consequently this lack of discussion in class has a negative effect only on the student because it reduces the chances for feedback or context clarification while lecturing. Last but not least, teaching theory without putting it on life situations may cause students to lose interest in their studies since the system considers him/her just as a number in the class and not a valuable person who can contribute with valuable ideas for the community. Working in groups and having chances to discuss with each other about the lesson is the main characteristic of new schooling system. This teaching method emphasizes the importance of collaborating with each other and it helps students get more involved in cooperative learning.

Job Analysis Essay

The reason for job analysis is to study and evaluate the things that a job is supposed to involve. This is describing exactly what skills are needed to perform the job, and what the exact qualifications are to fill the position. Job analysis is a method needed when the employee need to know the precise function. An example would be that an employee’s duties should be clearly stated. So, a jobs analyst is to observe the employee at his or her current duties. This is also helpful in deciding what the requirements are to perform this job more effectively. As well jobs continue to change so a job analyst n should watch for any changes so that things are kept put o date. The job analyst should therefore be familiar with the job a well as the position. â€Å"The job analysis will lead directly to development of numerous other significant workers (tools): job requirements, job assessment as well as job performance criteria† (Spector, 2008). Today families are shattered, language barriers are high, violence is a standard, and then education which does not get to high a priority. Counselors typically deal with these types of students that have tangible needs, emotional troubles, and behavioral issues. Counselors have an ear for listening; shoulders to cry on and a firm facilitator for regulations are what a school counselor should use. Before becoming a school counselor a person needs to become part of the educational system as a teacher. There are 10 principles that significant according to the Interstate New Teachers Assessment and Support Consortium when reviewing candidates for the position of school counselor. These principle consist of â€Å"learning styles and diversity, motivation and behavior, interpersonal relationships, communication and knowledge, instructional strategies and problem solving, planning for instruction, making content meaningful, assessment, child development and learning theory, and planning for instruction† INTASC, 2008). Many educators, mainly at an elementary age level, have a filled classroom with minimal resources in regards to discipline. It is important to keep a firm control of authority so as to support appropriate learning environment. Behavior is a test demonstrated by students to push more each day in bold new ways. Since these ideas have been said a prospective counselor in education needs to discern and recognize the benefits as well as the risks that are involved. The risks implicated the issues with reluctant and non participating family members with his or her child’s plan for behavioral concerns. The benefits are clear, when a school s filled with enjoyable, interactive programs t is pursued by a renewed sense of elation to from the students. Position Analysis Questionnaire Method The importance of job analysis in education is imperative. A systematic evaluation of a position for a school counselor aids in the supervised development of quality job performance. An Industrial and Organizational Psychologist employ wide range of techniques to perform accurate analysis on all jobs. An example would be functional job analysis, task inventories, job components inventory, and position analysis questionnaire. School counselors at the elementary level are most commonly given the positions analysis questionnaire. Job position for school counselors reflects services, codes, and programs this s found n Chapter 33 of the Texas Educational Code, Title 2 of the Texas Education Agency, or TEA. The basis of employment positions are required skills and the education a person needs to have to apply for a job. Counselors in Texas, has to have a degree n a Masters program with an credited University also have an official teaching certificate from Texas. In addition a people are required to teach a classroom setting for two years or more before an application for the counselor’s certification will be processed. A good score on certification examinations and a national finger print background check will then allow for the person to become an accredited applicant for school counselor (TEA, 2011). In 1996 across the state of Texas the Texas Evaluation Model for Professional School Counselors (TEMPSCO) was implemented. This serves as a form of regular analysis of an all school counselors. It is also pertinent for counselors teaching grades Pre-School -12th grades. It is documented on The School Guidance and Counseling Job Evaluation Form. Eight Domains of Job Performance There are a multitude of sub categories to the eight domains that are observed in the job analysis. This includes certain standards of personal behavior and job performance of the person in this position. All of the standards are provided by the Texas Education Code, Title 2, Public Education, Subtitle F. Curriculum, Programs, and Services: Service Programs nd Extracurricular Activities; Subchapter A; School Counselors and Counseling Programs (TEA, 2011). This requires practicing counselors to assess, arrange and administer developmental programs (including resources in a program and paraprofessionals) designed for other teachers, parents as well as students. Developmental programs need to concentrate on developing decision making, interpersonal effectiveness, self confidence, goal setting, cross cultural effectiveness, planning, communication, responsible behavior, and motivation to achieve (TEA, 2011). Also a school counselor is directed to oversee, review as well as plan guidance programs for students that have â€Å"developmental needs†. These needs are made up of physical disabilities, behavioral disorders, as well as learning disabilities. The addition of students who have disabilities is the essential goal for the TEA. Seen throughout the school district are the continued encouragement of other students and more importantly the parents of the child all through the domain of program management and guidance requirements. A school counselor is suppose to be able to openly counsel the students n a time of emergency, suffering, and other non specified issues. School counselors need to therefore consider many variables and use core concepts that are use n the field of Psychology. TEA advises the counselors to be current on theories and techniques that are believed to be satisfactory to achieve and establish individual, learning, community and occupational development for the students. There is a high standard for professionalism and compliance that counselors are held to. School counselors have to reflect proper moral, ethical, as well as lawful standards of behavior. Indecent use of communications or language and violation of school rules will not be allowed during any time for anyone that is n the educational system. This person is not only an advocate for the school, the students and parents, as well as the entire field of psychology. Reliability and Validity Reality and validity in regards to the job analysis of school counselor has significantly improving in comparison to earlier performed evaluations. The text materials and research carefully provides insight into each category and the requirement for each job position for further review and research. A list of certifications and prerequisite procedures are also listed. Evaluating eight levels of job requirements are: counseling, student assessment, professional standards, rogram management, coordination, guidance, and consulting (TEA, 2011). There are several columns or questions the evaluator has to answer. This is done with a score of 1-5 with each of the eight domain levels. The equivalent of the rating scale reflects the following: 1=unsatisfactory, 2=below, 3= meets the standards. 4=exceeds the standards, and 5= clearly outstanding. If the criteria or standard doesn’t pertain to the applicant during the evaluation NA will also apply. There is also a place on the evaluation to be left blank intentionally that will be used by the evaluator that includes his or her personal information, notes telling strengths additional comments that he or she has for the personnel, as well as areas that need to be worked on. Conclusion Depression, addictions, bipolar disorder, stress, divorce, anger, post traumatic stress disorder, autism, and attention deficit hyperactivity disorder are just a few of the many factors and disorders that a person would receive advice, therapy, and counseling. These disorders and factors affect numerous students and families alike. Therefore there is a need for ethical, compassionate, and competent school counselors are essential. There is also a dramatic difference in the salary based scale and the worth of a job position for school counselors and a professional licensed counselor n private practice. However, the wish to better children’s lives through forms of developmental programs, advocacy for success and psychotherapy, outweigh any financial gain.

For the first time

Time consumption also to be considered with these factors, being efficient is what all catering services needed and that would only be provided to us by our own technology. The significance of this proposal aims to give as alternative and replacement to the manual system that Belle's Catering Services is currently using. We know that all catering services are a big part of events. This proposal gives a computerized system to be able to have faster, easier and more convenient and more efficiency to the information system.This proposal also aims answer and makes the Belle's catering services mission and vision completely. Online Infringement's of Belle's Catering Services our system,delimitation systems (IS) is the study of complementary networks of reward and software that people and organizations use to collect, filter, process, create, and distribute data. The study bridges business and computer science using the theoretical foundations of information and computation to study variou s business models and related algorithmic processes within a computer science discipline.Computer Information System(s) (SIS) is a field studying computers and algorithmic processes, including their principles, their software and hardware designs, their applications, and their impact on society while IS emphasizes functionality over design. [Walk 2013] Our system focuses in Catering Services. It is the business of providing foddering at a remote site or a site like a hotel, public house and other various locations. This is a food or service that is catered to you, in other words,you pay them to bring you their services, most likely a food Joint. Online Infringement's for Belle's Catering Services 1. Background of the Study Maria Plainclothes started as an employee of a catering service. While her husband Leo Apaches is a set-up crew for the same catering service. When a friend suggest that they should start a small business in 2005. At first, they have a few customer who always orde r for them, then suddenly they have been recommended by a customer to have their own catering services, â€Å"The Belle's Catering Services†. The project titled Online Information System is a Catering Characteristic gives information about the services of Belle's Catering Services.The project â€Å"Online Information System† is developed in HTML using Adobe Dreamier CSS. 5 , which focuses on giving information, suggestions, and mainly catering events â€Å"Online Information System† is a web-based application that runs in any web browsers, designed to help users choose the catering services they want for their events. Recruiters is easy to use for both beginners and advanced users. It features a familiar well thought-out, an attractive user interface, combined with strong searching, and reporting capabilities.The report generation facility of information system's to get a good idea of which is the best package suitable for the person that is having their events. Problem 1. 1. 1 General Problem Statement of the How the proponents will develop an online information system that will provide efficiency in processing information and a module to update the customer's needs for the catering service events. . 1. 2 Specific Problem How the proponents will help the user to decide on the package that they will afford.This problem will specify on the decision support system that the proponents will use according to their money and according on how many persons are coming to the event. How the proponents will develop a module for the decision support system. This problem will specify on how will the proponents develop an easy and efficient decision support system 1. 2 Statement of Objectives 1. 2. 1 General Objectives To be able to develop a web-based application for Belle's Catering Services improve the processing of information and capability of a module to update the customers needs for the catering service events. . 2. 2 Specific Objectives To be a ble to help the user to decide on the package that they will afford . The system uses a Decision Support System (ADS) that will create an information and manipulate the user's choice of package. To be able to develop a module for the decision support system . Focuses on the condition of demonstrations needed by the users to identify the package for their given events. Study 1. 3 Significance of the Catering Services is a business that focuses between the caterer and the customer.It is transaction on what will be the request of the customer for them to satisfy their needs and to give an accurate information about the services of the caterer. The main objective of our group is to make the proposed system exist to help Belle's Catering Services to makeshift business automated. So that the process of the transaction will be more efficiently and faster. Students To improve their analytical thinking and to unproven their programming skills in the field of online information system. Benefi ciary To provided a well-defined proposed system in order to support their business in renovations between the customers.Customers To provide an information for them to know the choices that they want for their events,and for the suggestions they can say to the caterer in order for them to have a harmonium flow of the event. 1. 4 Scope and Limitation of the Study Scope of the Study The impact of technology has greatly expanded the scope and capacity of the average catering service. This is an on-going and developing relationship between the customer and the caterer as the computer's full capabilities are gradually explored and applied to the online information system.Without internet, advertising catering services is difficult to manage, as well as publishing of the proposed system. It is also time consuming for the transactions and will do much more delay for the events. Scope of the System 2. 0 Methodology of the Study This chapter starts on the discussion about the project resear ch disintermediation. The second part presents the development of the system . Project Development Spiral model The spiral model is a software development process combining elements of both design and prototyping-in-stages, in an effort to combine advantages of top-down and bottom-up concepts.Also known as the spiral lifestyle model (or spiral development), it is a systems development method (SAD) used in information technology (IT). This model of development combines the features of the prototyping and the waterfall model. The spiral model is intended for large, expensive and complicated projects. Figure 1. 0 6 Phases of Spiral Model The spiral model's divided into a number of frame work activities, also called task region. The figure 1. 0 illustrates spiral model containing 6 task regions: Customer Communication Task required to established effective communication between developer and customer.Planning Task required to define resources , timeliness ,and other project related info rmation . Risk Analysis Task required to asses both technical and management risk. Engineering Task required to build 1 or more representation of the application. Construction and release Task required to construct , test, install, and provide user support. Customer Evaluation Task required to obtained customer feedback based on evaluation of the software representation created during the engineering stage and environmental during the installation stage. 3. 0 Data Gathering, Procedures and OutputMany online information systems are operated manually by group of people. In such situations many people involved in the process of managing the catering such a way that inform the user regarding the information of the catering service, the decision support system of the catering, and help the customer to decide on how to choose their own affordable cater for their events. On the other hand keeping large amount of maintenance workers may cost a lot & it will not be efficient for a catering s ystem. Manual process in the transaction of the catering is not a reliable method.On the mint of view, in manual system the user can't find the suitable information for his or her events. We interview Mrs.. Beeline Apaches on how their catering services works and the required information in their business. We found out that their is a package in every events in their catering. For example, in wedding they have full package which cost IIOP,OHO up to IPPP,OHO. In that package they have a complete catering service with set-up, a place to have the venue, the amenities and miscellaneous, and other needs they can get by renting in other rental services (egg. Hairs and tables). We also visit their faceable account to gather some information to use in our proposed system . In their faceable account there are pictures of the events that in low resolution settings so we didn't use their own image as the picture of events in their catering services. There are also foods and beverages that have also low resolution so in order to improve the quality of the design of our proposed system we provide the detailed picture of Belle's Catering Online Information System.We decided that we will create two systems which is the back and front end. The front end is for the customer to vive the information about the services that Belle's Catering services offered. , while the back end is for the admit in controlling the data in the front end. In the process of our system, the customers will find the information in our system, their needs and suggestion will be provide by our Decision Support System (ADS), and other things that can be say to the caterer in the used of telephone/cellophane number or use as reference. The Existing System They have no existing system so that's why the proponents choose the Belle's Catering Services in order to make for them an existing online information system. . 1 Company Background Belle's Catering Services in Banana Mycenaean City, Vulcan is a public c atering service. The name Belle's Catering comes from the name of the owner Mrs.. Beeline Apaches. Maria Plainclothes started as an employee of a catering service. While her husband Leo Apaches is a set-up crew for the same catering service.When a friend suggest that they should start a small business in 2005. At first, they have a few 4. 2 Description of the System By using the present manual system, work is done manually. So, each and every transaction takes much time to complete. Whenever user requires any information, the decision and update process also takes more time and it is difficult to find particular information. As the transactions of the catering increases there is more information to be processed and stored.