性能描述

Biochem/physiol Actions
Antifungal agent，CYP3A4 inhibitor
Ketoconazole is a broad spectrum antifungal agent used to treat candidiasis, chronic mucocutaneous candidiasis, oral thrush, candiduria, blastomycosis, coccidioidomycosis, histoplasmosis, chromomycosis, and paracoccidioidomycosis. It is used to identify p-glycoprotein/CYP3A-limited bioavailability in the monkey model1, to study interleukin mediated antitumor effects, and drug interactions in vivo。
Ketoconazole interacts with 14-α demethylase, a cytochrome P-450 enzyme that is necessary for the conversion of lanosterol to ergosterol. This interaction inhibits ergosterol synthesis and results in increased fungal cellular permeability. Other possible mechanisms of action are the inhibition of endogenous respiration, interaction with membrane phospholipids, inhibition of yeast transformation to mycelial forms, inhibition of purine uptake, and impairment of triglyceride and/or phospholipid biosynthesis. Ketoconazole inhibits the synthesis of thromboxane and sterols such as aldosterone, cortisol, and testosterone .

描述：
酮康唑为类白色结晶性粉末；无臭，无味。本品在氯仿中易溶，在甲醇中溶解，在乙醇中微溶，在水中几乎不溶。熔点本品的熔点为147～151℃。比旋度取本品，精密称定，加甲醇制成每1ml中含40mg的溶液，依法测定，按干燥品计算，比旋度应为-1°至+1°。

用途：
咪唑类抗真菌药，其作用机制为抑制真菌细胞膜麦角甾醇的生物合成，影响细胞膜的通透性，抑制其生长。