Department of Immunology and Infection, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom; Department of Pharmaceutics, UCL School of Pharmacy, London, United Kingdom.
Department of Immunology and Infection, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Int J Parasitol Drugs Drug Resist. 2018 Aug;8(2):223-228. doi: 10.1016/j.ijpddr.2018.04.001. Epub 2018 Apr 12.
Fungisome (F), a liposomal amphotericin B (AmB) product, is marketed in India as a safe and effective therapeutic for the parasitic infection visceral leishmaniasis. Its potential in the treatment of cutaneous leishmaniasis (CL), a disfiguring form of the disease affecting the skin, is currently unknown. Here, we report the evaluation of the efficacy of F in the Leishmania major BALB/c murine model of CL, including a head-to-head comparison with the standard liposomal AmB formulation AmBisome (A). Upon intravenous administration at dose levels of 5, 10 and 15 mg/kg of body weight (on days 0, 2, 4, 6 and 8), F showed clear signs of toxicity (at 15 mg/kg), while A did not. After complete treatment (day 10), the tolerated doses of 5 and 10 mg/kg F had significant antileishmanial activity (ED = 4.0 and 12.8 mg/kg for qPCR-based parasite load and lesion size, respectively), although less than that of A at identical doses (ED = 3.0 and 8.8 mg/kg). The efficacy of F was inferior compared to A because lower levels of the active agent AmB accumulated within the infected lesion. In conclusion, despite possibly being less safe and efficacious than A at equivalent doses, the moderate in vivo activity of F could indicate a role in the systemic pharmacotherapy of CL.
真菌体(F)是一种脂质体两性霉素 B(AmB)产品,在印度作为一种治疗寄生虫感染内脏利什曼病的安全有效的治疗方法而上市。其在治疗皮肤利什曼病(CL)方面的潜力尚不清楚,CL 是一种影响皮肤的毁容性疾病。在这里,我们报告了 F 在利什曼原虫 BALB/c 小鼠 CL 模型中的疗效评估,包括与标准脂质体 AmB 制剂 AmBisome(A)的头对头比较。静脉注射剂量为 5、10 和 15mg/kg 体重(第 0、2、4、6 和 8 天)时,F 表现出明显的毒性迹象(在 15mg/kg 时),而 A 则没有。完全治疗(第 10 天)后,F 的耐受剂量为 5 和 10mg/kg 具有显著的抗利什曼原虫活性(基于 qPCR 的寄生虫负荷和病变大小的 ED=4.0 和 12.8mg/kg),尽管低于相同剂量的 A(ED=3.0 和 8.8mg/kg)。与 A 相比,F 的疗效较差,因为感染病灶内积累的活性药物 AmB 水平较低。总之,尽管在等效剂量下可能不如 A 安全有效,但 F 的适度体内活性可能表明其在 CL 的系统药物治疗中发挥作用。
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