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Alpha cells produce less glucagon in response to rising glucose levels, and more glucagon if blood glucose is low. Glucagon serves as a signal to the liver to break down glycogen and release glucose into the blood. Glucokinase in beta cells serves as a glucose sensor, amplifying insulin secretion as blood glucose rises.
MODY 2 or GCK-MODY is a form of maturity-onset diabetes of the young. [1] It is due to any of several mutations in the GCK gene on human chromosome 7 for glucokinase. [2] Glucokinase serves as the glucose sensor for the pancreatic beta cell. Normal glucokinase triggers insulin secretion as the glucose exceeds about 90 mg/dl (5 mM).
The glucokinase regulatory protein (GKRP) also known as glucokinase (hexokinase 4) regulator (GCKR) is a protein produced in hepatocytes (liver cells). GKRP binds and moves glucokinase (GK), thereby controlling both activity and intracellular location [1] [2] of this key enzyme of glucose metabolism. [3] GKRP is a 68 kD protein of 626 amino acids.
Soda and juices wreak havoc on blood-sugar levels. Add some interest to seltzer by squeezing in fresh citrus, opting for flavored (but not sweetened) versions, or infusing with a sprig of fresh herbs.
Normal blood glucose level (tested while fasting) for non-diabetics should be 3.9–5.5 mmol/L (70–100 mg/dL). [ 6 ] [ 7 ] [ 8 ] According to the American Diabetes Association , the fasting blood glucose target range for diabetics, should be 3.9 - 7.2 mmol/L (70 - 130 mg/dL) and less than 10 mmol/L (180 mg/dL) two hours after meals (as ...
Acid–base and blood gases are among the few blood constituents that exhibit substantial difference between arterial and venous values. [6] Still, pH, bicarbonate and base excess show a high level of inter-method reliability between arterial and venous tests, so arterial and venous values are roughly equivalent for these. [44]
The anti-diabetic drug metformin reduces blood glucose primarily through inhibition of gluconeogenesis, overcoming the failure of insulin to inhibit gluconeogenesis due to insulin resistance. [ 32 ] Studies have shown that the absence of hepatic glucose production has no major effect on the control of fasting plasma glucose concentration.
An example of an isozyme is glucokinase, a variant of hexokinase which is not inhibited by glucose 6-phosphate. Its different regulatory features and lower affinity for glucose (compared to other hexokinases), allow it to serve different functions in cells of specific organs, such as control of insulin release by the beta cells of the pancreas ...
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