“分子安全套”能防艾滋病 已进入人体试验阶段
文章来源: 李小白 于
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液体安全套
据美国广播公司和多家媒体报道,犹他州立大学科学家研制的“分子安全套”,即将进入人体试验阶段。
这种安全套用于女性阴道内,它有多个形态。在使用前,它是一种液体;喷到阴道内,就会在局部形成一层薄薄的固态凝胶体保护层。可是当它的“目标入侵者”———艾滋病病毒出现时,它又变回液态:一方面,它像一张渔网,能拦截直径为100纳米的病毒;另一方面,若有漏网之鱼,也会被凝胶释放出来的抗病毒物质“消灭”。“这听起来有点像科幻小说。”研究人员、生物工程学教授帕特里克8226;吉塞介绍。
科学家指出,用于阴道内的抗艾滋病杀菌剂的研发,已经有近二十年的历史了。之前,研究人员做过各式各样的实验,从带有药物的环一直到“分子安全套”。后者真正与众不同之处,在于当携带艾滋病病毒的精液出现时,这种特别的杀菌剂就会被立刻激活。这可能是因为精液进入阴道后,会使阴道内的酸性降低,凝胶立即液化。目前,研究人员正在想办法,往凝胶中加入一些抗病毒药物,使其在对抗艾滋病病毒时,还能阻拦其他性传播疾病。
据了解,这种“分子安全套”的保护作用能持续数天,甚至数周之久。然而,遗憾的是,这款安全套能挡住艾滋病病毒,却无法有效避孕。▲
(张越)
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