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What disease state results from abnormal hormonal regulation of glycolysis and β-oxidation?
Diabetic ketoacidosis (DKA).
What causes diabetic ketoacidosis?
Insulin deficiency combined with elevated glucagon, leading to uncontrolled lipolysis and β-oxidation.
How does insulin deficiency affect glycolysis and β-oxidation?
Glycolysis is suppressed
β-oxidation is stimulated, resulting in excess acetyl-CoA and ketone body production.
What is the result of unchecked ketone body synthesis in DKA?
Ketosis and metabolic acidosis, due to accumulation of acidic ketone bodies (especially acetoacetate and β-hydroxybutyrate).
What symptoms are associated with diabetic ketoacidosis?
Fruity breath (due to acetone)
Deep, rapid breathing (Kussmaul respiration)
Dehydration
Confusion or coma in severe cases
Why does the liver continue producing ketone bodies in DKA?
Due to high rates of β-oxidation and the liver's inability to utilize ketone bodies (it lacks thiophorase).