nucleoside analogs that target human immunodeficiency virus (HIV), a 6-cyclopropyl-substituted prodrug of 2',3'-didehydro-2',3'-dideoxyguanosine (cyclo-d4G) was synthesized, and its cellular metabolism, antiviral activity, and pharmacokinetic behavior were studied. Cyclo-d4G had selective anti-HIV activity in primary blood mononuclear cells (PBMCs), effectively inhibiting the LAI strain of HIV-1 by
为了更好地了解针对人免疫缺陷病毒(HIV)的平面不饱和核苷类似物的
核糖环中氧的重要性,它是2',3'-didehydro-2',3'-dideoxyguanosine的6-环丙基取代的前药(合成了环-d4G),并研究了其细胞代谢,抗病毒活性和药代动力学行为。Cyclo-d4G在原代血液单核细胞(P
BMC)中具有选择性的抗HIV活性,在1.1 +/- 0.1 microM时可有效抑制50%的HIV-1
LAI株,而在84.5 microM时可抑制50%的细胞活力。P
BMC中的抗病毒活性不受184位甲
硫氨酸突变为缬
氨酸的突变或病毒逆转录酶中与
胸苷相关的突变的明显影响。亮
氨酸74突变为缬
氨酸,赖
氨酸65突变为精
氨酸具有轻度至中度耐药性(高达5倍)。描绘细胞代谢和环d4G激活机制的研究表明,在
腺苷/
腺苷酸脱
氨酶
抑制剂2'-脱氧coformycin存在的情况下,抑制病毒复制的能力降低,这表明抗病毒活性是由于其代谢为2'