Sulfalene

Sulfalene (CAS No.: 152-47-6) is a long-acting sulfonamide compound widely utilized in antimicrobial and antiparasitic research, characterized by its role as a competitive inhibitor of para-aminobenzoic acid in the folic acid biosynthesis pathway through targeting dihydropteroate synthase (DHPS). By disrupting folate production, Sulfalene suppresses microbial proliferation and has demonstrated in vitro activity against a range of bacterial species as well as protozoan parasites, including Plasmodium berghei and Plasmodium falciparum, with efficacy typically observed in the low micromolar concentration range. Its prolonged elimination profile, reflected by an extended half-life, makes it a useful tool for studying sustained target inhibition and pharmacokinetic-pharmacodynamic relationships in experimental systems. In combination studies, Sulfalene is frequently evaluated alongside dihydrofolate reductase inhibitors such as trimethoprim to investigate synergistic effects on folate pathway blockade and resistance modulation in parasite models. This compound is commonly applied in cell-based assays and in vivo infection models to explore mechanisms of antimicrobial action, resistance development, and drug combination strategies, with experimental concentrations or dosing regimens adjusted according to specific study designs and research objectives.