科学家首次记录下HIV通过性传播的全过程
<p><span word="While">While</span> <span word="it">it</span>'<span word="s">s</span> <span word="well">well</span> <span word="known">known</span> <span word="that">that</span> <span word="HIV">HIV</span> <span word="is">is</span> <span word="transmitted">transmitted</span> <span word="sexually">sexually</span>, <span word="how">how</span> <span word="the">the</span> <span word="virus">virus</span> <span word="crosses">crosses</span> <span word="genital">genital</span> <span word="mucus">mucus</span> <span word="membranes">membranes</span> <span word="to">to</span> <span word="reach">reach</span> <span word="its">its</span> <span word="targets">targets</span> <span word="in">in</span> <span word="the">the</span> <span word="immune">immune</span> <span word="system">system</span> <span word="is">is</span> <span word="less">less</span> <span word="well">well</span> <span word="understood">understood</span>.</p><p>虽然我们都知道性行为是艾滋病病毒传播的主要方式之一，但是我们却对<span word="HIV">HIV</span>是如何穿过生殖器粘膜，最终抵达免疫系统中的靶细胞知之甚少。</p><p><span word="Previous">Previous</span> <span word="research">research</span> <span word="has">has</span> <span word="looked">looked</span> <span word="at">at</span> <span word="biochemical">biochemical</span> <span word="measurements">measurements</span> <span word="or">or</span> <span word="morphology">morphology</span> <span word="at">at</span> <span word="various">various</span> <span word="points">points</span> <span word="during">during</span> <span word="HIV">HIV</span> <span word="transmission">transmission</span> <span word="to">to</span> <span word="investigate">investigate</span> <span word="this">this</span> <span word="process">process</span>, <span word="but">but</span> <span word="in">in</span> <span word="a">a</span> <span word="study">study</span> <span word="published">published</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Cell">Cell</span> <span word="Reports">Reports</span>, <span word="researchers">researchers</span> <span word="in">in</span> <span word="France">France</span> <span word="constructed">constructed</span> <span word="an">an</span> <span word="in">in</span> <span word="vitro">vitro</span> <span word="model">model</span> <span word="of">of</span> <span word="urethral">urethral</span> <span word="mucosa">mucosa</span> <span word="in">in</span> <span word="order">order</span> <span word="to">to</span> <span word="view">view</span> <span word="it">it</span> <span word="from">from</span> <span word="start">start</span> <span word="to">to</span> <span word="finish">finish</span>.</p><p>在先前的研究中，科学家主要从生化指标或形态学的角度去研究<span word="HIV">HIV</span>传播的过程，但在发表在《细胞报告》期刊的一项研究中，来自法国的研究人员构建了体外尿道粘膜模型，来观察整个传播过程。</p>
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