“分子安全套”能防艾滋病 已進入人體試驗階段
文章來源: 李小白 於
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液體安全套
據美國廣播公司和多家媒體報道,猶他州立大學科學家研製的“分子安全套”,即將進入人體試驗階段。
這種安全套用於女性陰道內,它有多個形態。在使用前,它是一種液體;噴到陰道內,就會在局部形成一層薄薄的固態凝膠體保護層。可是當它的“目標入侵者”———艾滋病病毒出現時,它又變回液態:一方麵,它像一張漁網,能攔截直徑為100納米的病毒;另一方麵,若有漏網之魚,也會被凝膠釋放出來的抗病毒物質“消滅”。“這聽起來有點像科幻小說。”研究人員、生物工程學教授帕特裏克8226;吉塞介紹。
科學家指出,用於陰道內的抗艾滋病殺菌劑的研發,已經有近二十年的曆史了。之前,研究人員做過各式各樣的實驗,從帶有藥物的環一直到“分子安全套”。後者真正與眾不同之處,在於當攜帶艾滋病病毒的精液出現時,這種特別的殺菌劑就會被立刻激活。這可能是因為精液進入陰道後,會使陰道內的酸性降低,凝膠立即液化。目前,研究人員正在想辦法,往凝膠中加入一些抗病毒藥物,使其在對抗艾滋病病毒時,還能阻攔其他性傳播疾病。
據了解,這種“分子安全套”的保護作用能持續數天,甚至數周之久。然而,遺憾的是,這款安全套能擋住艾滋病病毒,卻無法有效避孕。▲
(張越)
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