Glomerulus · Histology

Which protein is the main structural component of the slit diaphragm, and its mutation often leads to congenital nephrotic syndrome?

  1. Type IV Collagen
  2. Laminin
  3. Nephrin
  4. Fibronectin
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Correct answer: Nephrin

Nephrin is a transmembrane protein that bridges the filtration slit. It plays a critical role in maintaining the integrity of the filtration barrier; defects in nephrin lead to massive proteinuria.

Difficulty: Medium Question 9 of 20

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