Propofol infusion syndrome is thought to be related to a failure of which process?

Propofol infusion syndrome is thought to be related to a failure of which process?

• A. Free fatty acid transport into mitochondria
• B. Glycolysis
• C. Beta-oxidation
• D. Electron transport chain

Answer: (A)

Propofol infusion syndrome is thought to cause energy failure by impairing mitochondrial fatty acid oxidation. For long-chain fatty acids to be oxidized, they must be transported into the mitochondria via the carnitine shuttle. If this transport step is disrupted by propofol, fatty acids cannot enter the mitochondria to undergo beta-oxidation, so ATP production from fat is severely limited. This energy deficit is especially harmful to high-demand tissues like the heart and skeletal muscle, leading to cardiomyopathy, rhabdomyolysis, metabolic acidosis, and organ dysfunction seen in PRIS. Glycolysis occurs in the cytosol and relies on glucose, which cannot fully compensate for the loss of mitochondrial fatty acid oxidation in these patients. While the electron transport chain can be affected secondarily, the initiating problem tied to PRIS is the failure of fatty acids to enter mitochondria for oxidation.

Propofol infusion syndrome is thought to cause energy failure by impairing mitochondrial fatty acid oxidation. For long-chain fatty acids to be oxidized, they must be transported into the mitochondria via the carnitine shuttle. If this transport step is disrupted by propofol, fatty acids cannot enter the mitochondria to undergo beta-oxidation, so ATP production from fat is severely limited. This energy deficit is especially harmful to high-demand tissues like the heart and skeletal muscle, leading to cardiomyopathy, rhabdomyolysis, metabolic acidosis, and organ dysfunction seen in PRIS. Glycolysis occurs in the cytosol and relies on glucose, which cannot fully compensate for the loss of mitochondrial fatty acid oxidation in these patients. While the electron transport chain can be affected secondarily, the initiating problem tied to PRIS is the failure of fatty acids to enter mitochondria for oxidation.