Sandbox Reserved 761: Difference between revisions

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==Implicatons==

[[Image:Implications.jpg|frame|left|Figure 5. This schematic shows how the loss GTP inhibition can cause the hyperstimulated secretion of insulin (top) and the elevated serum levels of ammonium (bottom). In the pancreas, the loss of GTP inhibition increases the flux of glutamate to the Krebs cycle, leading to elevated ATP levels and secretion of insulin. In the liver, not only does accelerated catabolism increase the levels of ammonium, but the lower levels of glutamate also decrease the production of N-acetylglutamate.]] Hyperosmolar hyperglycemic state (HHS) was one of the first diseases that clearly linked GDH regulation to insulin and ammonia homeostasis. Recent studies ~~demonstrate~~ that the activation of GDH ~~was~~ tightly correlated with increased glutaminolysis and release of insulin. HHS syndrome is caused by the loss of GTP regulation of GDH. Children with HHS have increased β-cell responsiveness ~~to leucine~~ and susceptibility to hypoglycemia following high protein meals~~. This is~~ due to uncontrolled catabolism of amino acids yielding high ATP levels that stimulate insulin secretion and high serum levels of ammonium. ~~The~~ elevation of serum ammonia levels induces an altered regulation of GDH, leading to increased ammonia production from glutamate oxidation. In addition to that, it can cause impaired urea synthesis by carbmoylphosphate synthetase (CPS) due to reduced formation of N-actyl-glutamate (activator) from glutamate (figure 4). This genetic lesion disrupts the regulator linkage between glycolysis and amino acid catabolism. <ref>D'Mello, J. P. F.. "Glutamate Dehydrogenase." Amino Acids in Human Nutrition and Health. 2012. 1-23. Print</ref>.

[[Image:Implications.jpg|frame|left|Figure 5. This schematic shows how the loss GTP inhibition can cause the hyperstimulated secretion of insulin (top) and the elevated serum levels of ammonium (bottom). In the pancreas, the loss of GTP inhibition increases the flux of glutamate to the Krebs cycle, leading to elevated ATP levels and secretion of insulin. In the liver, not only does accelerated catabolism increase the levels of ammonium, but the lower levels of glutamate also decrease the production of N-acetylglutamate.]] Hyperosmolar hyperglycemic state (HHS), a complication of diabetes 2, in which high blood sugars can cause severe dehydration, coma, or death, was one of the first diseases that clearly linked GDH regulation to insulin and ammonia homeostasis. Recent studies have demonstrated that the activation of GDH it tightly correlated with increased glutaminolysis and release of insulin. HHS syndrome is caused by the loss of GTP regulation of GDH. Children with HHS have increased β-cell responsiveness and susceptibility to hypoglycemia following high protein meals due to uncontrolled catabolism of amino acids yielding high ATP levels that stimulate insulin secretion and high serum levels of ammonium. This elevation of serum ammonia levels induces an altered regulation of GDH, leading to increased ammonia production from glutamate oxidation. In addition to that, it can cause impaired urea synthesis by carbmoylphosphate synthetase (CPS) due to reduced formation of N-actyl-glutamate (activator) from glutamate (figure 4). This genetic lesion disrupts the regulator linkage between glycolysis and amino acid catabolism. <ref>D'Mello, J. P. F.. "Glutamate Dehydrogenase." Amino Acids in Human Nutrition and Health. 2012. 1-23. Print</ref>.

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 ==Implicatons==
-[[Image:Implications.jpg|frame|left|Figure 5. This schematic shows how the loss GTP inhibition can cause the hyperstimulated secretion of insulin (top) and the elevated serum levels of ammonium (bottom). In the pancreas, the loss of GTP inhibition increases the flux of glutamate to the Krebs cycle, leading to elevated ATP levels and secretion of insulin. In the liver, not only does accelerated catabolism increase the levels of ammonium, but the lower levels of glutamate also decrease the production of N-acetylglutamate.]] Hyperosmolar hyperglycemic state (HHS) was one of the first diseases that clearly linked GDH regulation to insulin and ammonia homeostasis. Recent studies demonstrate that the activation of GDH was tightly correlated with increased glutaminolysis and release of insulin. HHS syndrome is caused by the loss of GTP regulation of GDH. Children with HHS have increased β-cell responsiveness to leucine and susceptibility to hypoglycemia following high protein meals. This is due to uncontrolled catabolism of amino acids yielding high ATP levels that stimulate insulin secretion and high serum levels of ammonium. The elevation of serum ammonia levels induces an altered regulation of GDH, leading to increased ammonia production from glutamate oxidation. In addition to that, it can cause impaired urea synthesis by carbmoylphosphate synthetase (CPS) due to reduced formation of N-actyl-glutamate (activator) from glutamate (figure 4). This genetic lesion disrupts the regulator linkage between glycolysis and amino acid catabolism. <ref>D'Mello, J. P. F.. "Glutamate Dehydrogenase." Amino Acids in Human Nutrition and Health. 2012. 1-23. Print</ref>.
+[[Image:Implications.jpg|frame|left|Figure 5. This schematic shows how the loss GTP inhibition can cause the hyperstimulated secretion of insulin (top) and the elevated serum levels of ammonium (bottom). In the pancreas, the loss of GTP inhibition increases the flux of glutamate to the Krebs cycle, leading to elevated ATP levels and secretion of insulin. In the liver, not only does accelerated catabolism increase the levels of ammonium, but the lower levels of glutamate also decrease the production of N-acetylglutamate.]] Hyperosmolar hyperglycemic state (HHS), a complication of diabetes 2, in which high blood sugars can cause severe dehydration, coma, or death, was one of the first diseases that clearly linked GDH regulation to insulin and ammonia homeostasis. Recent studies have demonstrated that the activation of GDH it tightly correlated with increased glutaminolysis and release of insulin. HHS syndrome is caused by the loss of GTP regulation of GDH. Children with HHS have increased β-cell responsiveness and susceptibility to hypoglycemia following high protein meals due to uncontrolled catabolism of amino acids yielding high ATP levels that stimulate insulin secretion and high serum levels of ammonium. This elevation of serum ammonia levels induces an altered regulation of GDH, leading to increased ammonia production from glutamate oxidation. In addition to that, it can cause impaired urea synthesis by carbmoylphosphate synthetase (CPS) due to reduced formation of N-actyl-glutamate (activator) from glutamate (figure 4). This genetic lesion disrupts the regulator linkage between glycolysis and amino acid catabolism. <ref>D'Mello, J. P. F.. "Glutamate Dehydrogenase." Amino Acids in Human Nutrition and Health. 2012. 1-23. Print</ref>.
 ==Applications==