Immunosuppressants · Pharmacology

Tacrolimus exerts its effect by binding to which specific immunophilin?

  1. Cyclophilin
  2. FK-binding protein (FKBP-12)
  3. Glucocorticoid receptor
  4. Albumin
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Correct answer: FK-binding protein (FKBP-12)

Tacrolimus (FK506) binds to FKBP-12. The resulting complex inhibits calcineurin, similar to the cyclosporine-cyclophilin complex, but tacrolimus is significantly more potent.

Difficulty: Medium Question 3 of 20

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