How do biguanides affect hepatic gluconeogenesis?

How do biguanides affect hepatic gluconeogenesis?

• A. They enhance gluconeogenesis
• B. They have no effect on gluconeogenesis
• C. They decrease gluconeogenesis
• D. They are only effective in the presence of food

Answer: (C)

Biguanides, such as metformin, are well-known for their role in managing type 2 diabetes primarily through their effects on hepatic glucose metabolism. They are particularly effective in decreasing hepatic gluconeogenesis, which is the process where glucose is produced from non-carbohydrate sources in the liver. The mechanism through which biguanides exert this effect involves the activation of AMP-activated protein kinase (AMPK), which leads to a reduction in the expression of genes responsible for gluconeogenesis. As a result, the production of glucose from the liver is suppressed, contributing to lowered blood glucose levels. This reduction in gluconeogenesis is crucial in the overall effect of biguanides, as it helps to alleviate hyperglycemia in diabetic patients. The understanding of this mechanism is essential for comprehending how biguanides function in the context of diabetes management. The other options do not align with the established pharmacological actions of biguanides, which specifically include the reduction of glucose output from the liver.

Biguanides, such as metformin, are well-known for their role in managing type 2 diabetes primarily through their effects on hepatic glucose metabolism. They are particularly effective in decreasing hepatic gluconeogenesis, which is the process where glucose is produced from non-carbohydrate sources in the liver.

The mechanism through which biguanides exert this effect involves the activation of AMP-activated protein kinase (AMPK), which leads to a reduction in the expression of genes responsible for gluconeogenesis. As a result, the production of glucose from the liver is suppressed, contributing to lowered blood glucose levels.

This reduction in gluconeogenesis is crucial in the overall effect of biguanides, as it helps to alleviate hyperglycemia in diabetic patients. The understanding of this mechanism is essential for comprehending how biguanides function in the context of diabetes management. The other options do not align with the established pharmacological actions of biguanides, which specifically include the reduction of glucose output from the liver.