目的:确定1,3,4,6-四-O-乙酰基-β-D-氨基葡萄糖棉酚Schiff碱结构及其优势构象,并探讨其抗HIV-1病毒活性。方法:制备1,3,4,6-四-O-乙酰基-β-D-氨基葡萄糖棉酚Schiff碱,并利用红外光谱,核磁波谱技术和PM6半经典计算等方法对其结构进行解析;采用HIV-l_(ⅢB)/TZM-bl细胞指示系统测定其抗HIV-1病毒活性。结果:光谱分析表明1,3,4,6-四-O-乙酰基-β-D-氨基葡萄糖棉酚Schiff碱新化合物具有烯胺-烯胺结构特征,并归属了所有碳原子和氢质子化学位移;PM6研究表明1,3,4,6-四-O-乙酰基-β-D-氨基葡萄糖棉酚Schiff碱烯胺-烯胺和亚胺-亚胺构型的生成热分别为-4 168.415 k J·mol^(-1)和-4 150.080 k J·mol^(-1),烯胺-烯胺构型在能量上更有利,并确立了其优势构象,分子内氢键使其更为稳定,与光谱分析结果一致;新化合物显示了较强的抗艾滋病毒活性,可能作用在病毒感染细胞的进入阶段。结论:1,3,4,6-四-O-乙酰基-β-D-氨基葡萄糖棉酚Schiff碱以烯胺-烯胺构型存在,具有一定抗艾滋病毒活性。
A series of novel gossypol derivatives were synthesized and screened for their in vitro anti-HIV- 1I activity. The results showed that replacing the aldehyde groups of gossypol with certain oligopeptides and Dglucosamine not only reduced the cytotoxicity of gossypol derivatives but also enhanced their antiviral activity against HIV-1. Interestingly, D-glucosamine derivative of gossypol that lacked the COONa group also exhibited the same potent anti-HIV-1 activity as oligopeptide derivatives with the COONa group. These compounds blocked the entry of HIV-1ⅢB into target cell. which was similar to T20. Furthermore, the molecular docking analysis rationalized their anti-HIV-1 activity. The results also implied that certain oligopeptides and D-glucosamine were important moities to prepare gossypol derivatives as HIV- 1 entry inhibitors besides certain amino acids.
