Acid-Base Balance Pathway Proteins

"Acid-base balance pathway proteins" refers to a diverse group of enzymes, transporters, channels, and receptors that collectively regulate and maintain physiological pH by controlling the movement and chemical conversion of acids and bases, primarily through renal, respiratory, and cellular mechanisms. This classification encompasses major targets such as carbonic anhydrases (enzymes catalyzing CO₂ hydration/dehydration), various membrane transporters (including sodium-bicarbonate cotransporters, sodium-hydrogen exchangers, and chloride-bicarbonate anion exchangers), ion channels, and pH/bicarbonate-responsive G protein-coupled receptors. These proteins underlie the primary mechanisms of acid-base homeostasis across organs and are implicated in a wide range of diseases, from kidney and respiratory disorders to cancer and cardiovascular conditions[1][2][4][5][6]. They do not constitute a single, druggable target but rather multiple distinct proteins, which are individually targeted in clinical practice depending on the specific pathophysiological context.

Other names

Acid-base transportersAcid-base homeostasis proteinsAcid-base regulatorsRenal acid-base transport proteinsAcid-base pathway enzymes

Inhibiting carbonic anhydrase to reduce H(+)/HCO₃⁻ transport; Blocking acid or proton secretion (pump/channel/receptor inhibition); Modulating renal tubular reabsorption/secretion; Alkalinizing body fluids by direct buffering (sodium bicarbonate); Modulating GPCRs responsive to pH or bicarbonate for tissue protection in injury.