ABSTRACTMicrosporidia are eukaryotic obligate intracellular protists that are emerging pathogens in immunocompromised hosts, such as patients with AIDS or patients who have undergone organ transplantation. We have demonstrated in vitro and in vivo that synthetic polyamine analogs are effective antimicrosporidial agents with a broad therapeutic window. CD8-knockout mice or nude mice infected with the microsporidianEncephalitozoon cuniculiwere cured when they were treated with four different novel polyamine analogs at doses ranging from 1.25 to 5 mg/kg of body weight/day for a total of 10 days. Cured animals demonstrated no evidence of parasitemia by either PCR or histologic staining of tissues 30 days after untreated control animals died.
摘要微孢子虫是真核细胞内强制性原生生物,是免疫功能低下宿主(如艾滋病患者或接受过器官移植的患者)中新出现的病原体。我们已在体外和体内证明,合成多胺类似物是有效的抗孢子虫药物,具有广泛的治疗窗口期。用四种不同的新型多胺类似物按每公斤体重 1.25 至 5 毫克/天的剂量治疗小鼠或裸鼠,共 10 天后,感染阴沟脑膜炎小孢子虫的小鼠或裸鼠痊愈。治愈的动物在未经治疗的对照组动物死亡 30 天后,通过 PCR 或组织学染色检查,均未发现寄生虫血症的迹象。