Endosomal pH buffering

“Endosomal pH buffering” refers to the complex and dynamic biological processes modulating and maintaining the acidic environment inside endosomes, crucial for endosomal maturation, cargo release, receptor recycling, and intracellular trafficking. The main contributors to acidification are proton-pumping vacuolar ATPases (V-ATPases), while Na+/H+ exchangers and anion channels regulate pH and ionic balance. Small molecule modulators (e.g., bafilomycin A1, chloroquine) are frequently used experimentally to alter endosomal pH, but these often lack specificity and may disrupt multiple cellular compartments. Although not a single molecular target, the components that regulate endosomal pH are under active investigation as potential modulators of infection, neurodegeneration, and drug delivery.

Inhibition of V-ATPase to block proton pumping; Buffering capacity to raise endosomal pH (e.g., via "proton sponge" effect or weak base accumulation)