Systemic acid-base balance via bicarbonate generation from acetate

Systemic acid-base balance via bicarbonate generation from acetate is a physiological process utilized to maintain blood pH through the metabolic conversion of acetate into bicarbonate ions (StatPearls, 2023). The mechanism begins with the activation of acetate to acetyl-CoA by the enzyme acetyl-CoA synthetase (ACSS), followed by its oxidation in the tricarboxylic acid (TCA) cycle to produce carbon dioxide (CO2) and water (NIH, 2017). Carbonic anhydrase then catalyzes the hydration of CO2 to form carbonic acid, which dissociates into bicarbonate and hydrogen ions, thereby increasing the serum bicarbonate concentration and buffering excess acidity (Journal of Biological Chemistry, 2021). This pathway is clinically leveraged through the administration of sodium acetate in balanced intravenous fluids, parenteral nutrition, and hemodialysis to correct metabolic acidosis, especially when direct bicarbonate administration is impractical (PubMed, 2015). While effective, the process requires intact cellular metabolism and can lead to complications such as metabolic alkalosis, hypokalemia, or hemodynamic instability if acetate is administered too rapidly (Clinical Kidney Journal, 2017).

Other names

Acetate metabolism to bicarbonateAcetate bufferingBicarbonate generation from acetateMetabolic buffering via acetate

Acetate is metabolized to acetyl-CoA by acetyl-CoA synthetase, which then enters the citric acid cycle to produce CO2. Carbonic anhydrase converts this CO2 into bicarbonate, which increases the blood's buffering capacity and raises systemic pH.