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Pathogenesis of nonketotic hyperosmolar diabetic coma.
Lancet (London, England)
|May 10, 1975
Summary
This study explains nonketotic hyperosmolar diabetic coma by proposing an insulinized liver directs fatty acids away from ketone production. Enhanced liver gluconeogenesis, driven by a high glucagon-to-insulin ratio, causes severe hyperglycemia.
Area of Science:
- Biochemistry
- Endocrinology
- Metabolic Disorders
Background:
- Nonketotic hyperosmolar diabetic coma presents puzzling biochemical features.
- Understanding these features is crucial for effective diabetes management.
Purpose of the Study:
- To elucidate the biochemical mechanisms underlying nonketotic hyperosmolar diabetic coma.
- To explain the absence of hyperketonemia and the presence of massive hyperglycemia.
Main Methods:
- Conceptual advancement of biochemical pathways.
- Analysis of hormonal influences (insulin, glucagon) on hepatic metabolism.
- Evaluation of free fatty acid metabolism and gluconeogenesis.
Main Results:
- An insulinized liver, despite peripheral insulin resistance, promotes nonketogenic fatty acid metabolism (triglyceride synthesis), preventing ketogenesis.
- Elevated hepatic gluconeogenesis, driven by a high portal-vein glucagon-to-insulin ratio, leads to severe hyperglycemia.
Conclusions:
- The proposed dual hepatic and peripheral metabolic state explains key features of nonketotic hyperosmolar diabetic coma.
- These insights offer a framework for understanding and potentially treating this severe diabetic complication.