Vahlenkamp T W, De Ronde A, Balzarini J, Naesens L, De Clercq E, van Eijk M J, Horzinek M C, Egberink H F
Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
Antimicrob Agents Chemother. 1995 Mar;39(3):746-9. doi: 10.1128/AAC.39.3.746.
The antiviral efficacy of acyclic nucleoside phosphonates, including 9-(2-phosphonylmethoxyethyl)adenine (PMEA) and (R)-9-(2-phosphonylmethoxypropyl)-2,6-diaminopurine [(R)-PMPDAP] against feline immunodeficiency virus (FIV) infection was determined. (R)-PMPDAP showed the highest selectivity index (> 2,000) in vitro. Treatment of experimentally FIV-infected asymptomatic cats with PMEA or (R)-PMPDAP had no effect on the CD4+/CD8+ ratio. However, mean plasma viral RNA concentrations decreased significantly in the (R)-PMPDAP-treated cats. Our data show that, in comparison to PMEA, (R)-PMPDAP is a more potent and less toxic inhibitor of FIV replication both in vitro and in vivo.
测定了包括9-(2-膦酰甲氧基乙基)腺嘌呤(PMEA)和(R)-9-(2-膦酰甲氧基丙基)-2,6-二氨基嘌呤[(R)-PMPDAP]在内的无环核苷膦酸酯对猫免疫缺陷病毒(FIV)感染的抗病毒效力。(R)-PMPDAP在体外显示出最高的选择性指数(>2000)。用PMEA或(R)-PMPDAP治疗实验性感染FIV的无症状猫对CD4+/CD8+比值没有影响。然而,在接受(R)-PMPDAP治疗的猫中,血浆病毒RNA平均浓度显著降低。我们的数据表明,与PMEA相比,(R)-PMPDAP在体外和体内都是一种更有效且毒性更小的FIV复制抑制剂。