describe the various types of glycogen storage diseases.
Question
describe the various types of glycogen storage diseases.
Solution
Glycogen storage diseases (GSDs) are a group of inherited genetic disorders that involve the improper metabolism of glycogen. They are caused by deficiencies in the enzymes responsible for synthesizing or breaking down glycogen in the body. Here are the various types of GSDs:
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Type I (Von Gierke disease): This is the most common type of GSD. It is caused by a deficiency in the enzyme glucose-6-phosphatase, which is necessary for the final step in the conversion of glycogen to glucose. Symptoms include severe hypoglycemia, growth retardation, and hepatomegaly.
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Type II (Pompe disease): This type is caused by a deficiency in the enzyme acid alpha-glucosidase, which is necessary for the breakdown of glycogen in the lysosomes. It primarily affects the heart and skeletal muscles, leading to muscle weakness and respiratory problems.
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Type III (Cori disease): This type is caused by a deficiency in the enzyme debrancher enzyme, which is necessary for the breakdown of glycogen. Symptoms include hypoglycemia, hepatomegaly, and muscle weakness.
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Type IV (Andersen disease): This type is caused by a deficiency in the enzyme branching enzyme, which is necessary for the formation of glycogen. It leads to the accumulation of abnormal glycogen molecules, causing hepatomegaly and cirrhosis.
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Type V (McArdle disease): This type is caused by a deficiency in the enzyme muscle phosphorylase, which is necessary for the breakdown of glycogen in muscle cells. Symptoms include muscle weakness and cramps during exercise.
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Type VI (Hers disease): This type is caused by a deficiency in the enzyme liver phosphorylase, which is necessary for the breakdown of glycogen in the liver. Symptoms are similar to those of Type I but are generally milder.
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Type VII (Tarui disease): This type is caused by a deficiency in the enzyme phosphofructokinase, which is necessary for the breakdown of glycogen in muscle cells. Symptoms include muscle weakness and cramps during exercise.
Each type of GSD has its own specific symptoms and complications, and the severity can vary greatly from person to person.
Similar Questions
Glycogen storage disease type I (GSD I) or von Gierke's disease, is the most common of the glycogen storage diseases. This genetic disease results from deficiency of the enzyme glucose-6-phosphatase.The metabolic outcomes of GSD I are likely to include :Group of answer choicesHigh blood glucose, decreased blood pH, decreased glycogen storage in liver and kidneysLow blood glucose, increased blood pH, decreased glycogen storage in liver and kidneysHigh blood glucose, increased blood pH, increased glycogen storage in liver and kidneysHigh blood glucose, decreased blood pH, increased glycogen storage in liver and kidneysLow blood glucose, increased blood pH, increased glycogen storage in liver and kidneysLow blood glucose, decreased blood pH, decreased glycogen storage in liver and kidneysHigh blood glucose, increased blood pH, decreased glycogen storage in liver and kidneysLow blood glucose, decreased blood pH, increased glycogen storage in liver and kidneys
Von Gierke’s and McArdle’s disease are two of the most common glycogen storage diseases.Which of the following statements are TRUE for these diseases? i) Von Gierke’s disease typically results from a mutation in glucose 6-phosphatase.ii) McArdle’s disease typically results from a mutation in glycogen phosphorylase.iii) McArdle’s disease typically results from a mutation in glucose 6-phosphatase.iv) Von Gierke’s disease typically results from a mutation in glycogen phosphorylase.v) Von Gierke’s disease patients cannot release glucose to the blood, have enlarged livers and kidneys and elevated lipids in the blood (hyperlipidaemia).vi) McArdle’s disease patients cannot release glucose to the blood, have enlarged livers and kidneys and elevated lipids in the blood (hyperlipidaemia).vii) McArdle’s disease patients suffer from severe muscle cramps with initial attempts of exercise, but these cramps subside with repeated attempts.viii) Von Gierke’s disease patients suffer from severe muscle cramps with initial attempts of exercise, but these cramps subside with repeated attempts.
Glycogen molecules are stored in liver and --------------
describe the structure of glycogen, and its importance as a carbohydrate reserve.
Which of the following abnormalities will prevent glycogen synthesis?Group of answer choicesA. A glycogenin that contains no tyrosine residues in its primary structureB. A glycogenin that has no glycosyl transferase activityC. A glycogenin that is unable to bind UDP-GlucoseD. A glycogenin that is unable to create branches in linear glucose chainsE. More than one choice above
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