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. Author manuscript; available in PMC: 2022 Jan 1.
Published in final edited form as: Acta Physiol (Oxf). 2020 Jun 10;231(1):e13512. doi: 10.1111/apha.13512

Figure 7. Current model of proteolytic ENaC activation in nephrotic syndrome.

Figure 7.

Glomerular proteinuria leads to aberrant filtration of serine proteases including uPA and plg as zymogens. Plg is activated by uPA leading to plasmin formation in the tubular space. However, this is not required for activation of ENaC by proteolysis of its γ-subunit. The identity of the essential serine protease(s) is not known.