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Sulfisoxazole (Sulfafurazole) is a short-acting sulfonamide antibacterial with activity against a wide range of gram-negative and gram-positive organisms.Sulfisoxazole inhibits breast cancer exosome release by targeting endothelin receptor A.

Sulfisoxazole diethanolamine, also known as Sulfafurazole diethanolamine, is a sulfonamide antibacterial compound with an oxazole substituent. It acts as an endothelin receptor antagonist, specifically targeting endothelin receptor A with an IC50 value of 0.60 μM and endothelin receptor B with an IC50 value of 22 μM. Additionally, Sulfisoxazole diethanolamine has been found to inhibit the release of breast cancer exosomes by specifically targeting endothelin receptor A [1] [2].