Bicarbonate gradient

The "bicarbonate gradient" refers to the difference in bicarbonate ion concentration across a biological membrane. This gradient is essential for acid–base homeostasis, cellular pH regulation, and transport of CO₂ waste, functioning largely via bicarbonate transporters (such as SLC4 and SLC26 family members) and enzymes like carbonic anhydrase, which are the true molecular targets in therapeutic contexts[1][5][6][8][9]. Disrupted bicarbonate gradients, typically due to dysfunction of these proteins, underlie various diseases including some forms of renal tubular acidosis and cancer. Therapies and diagnostics focus on modulating or assessing the activity and function of the proteins responsible for generating and maintaining these gradients, not the gradient itself.

Other names

transmembrane bicarbonate gradientHCO₃⁻ gradient

Not applicable to the gradient itself; relevant mechanisms include: Inhibition of bicarbonate transporters; Inhibition of carbonic anhydrases, which modulate bicarbonate gradients