研究显示 口腔细菌竟可引发肠道癌
<p><span word="Brushing">Brushing</span> <span word="your">your</span> <span word="teeth">teeth</span> <span word="regularly">regularly</span> <span word="could">could</span> <span word="help">help</span> <span word="to">to</span> <span word="prevent">prevent</span> <span word="bowel">bowel</span> <span word="cancer">cancer</span>, <span word="a">a</span> <span word="study">study</span> <span word="suggests">suggests</span>.</p><p>一项研究显示，定期刷牙可有助于预防肠道癌。</p><p><span word="This">This</span> <span word="is">is</span> <span word="because">because</span> <span word="the">the</span> <span word="mouth">mouth</span> <span word="bacteria">bacteria</span> <span word="that">that</span> <span word="cause">cause</span> <span word="bleeding">bleeding</span> <span word="gums">gums</span> <span word="can">can</span> <span word="travel">travel</span> <span word="via">via</span> <span word="the">the</span> <span word="blood">blood</span> <span word="to">to</span> <span word="the">the</span> <span word="bowel">bowel</span> <span word="where">where</span> <span word="they">they</span> <span word="could">could</span> <span word="trigger">trigger</span> <span word="cancer">cancer</span> <span word="or">or</span> <span word="worsen">worsen</span> <span word="existing">existing</span> <span word="tumours">tumours</span>.</p><p>这是因为，人口中有可以引起牙龈出血的细菌，而这些细菌能够通过血液进入肠道，从而引发癌症或者恶化已有的肿瘤症状。</p><p><span word="The">The</span> <span word="bug">bug</span> <span word="fusobacterium">fusobacterium</span> <span word="has">has</span> <span word="been">been</span> <span word="found">found</span> <span word="to">to</span> <span word="be">be</span> <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="times">times</span> <span word="more">more</span> <span word="common">common</span> <span word="in">in</span> <span word="cancerous">cancerous</span> <span word="tumours">tumours</span> <span word="than">than</span> <span word="in">in</span> <span word="normal">normal</span> <span word="cells">cells</span>. <span word="Now">Now</span> <span word="researchers">researchers</span> <span word="have">have</span> <span word="found">found</span> <span word="that">that</span> <span word="the">the</span> <span word="microbes">microbes</span> <span word="can">can</span> <span word="make">make</span> <span word="pre">pre</span>-<span word="cancerous">cancerous</span> <span word="growths">growths</span> <span word="in">in</span> <span word="the">the</span> <span word="bowel">bowel</span> <span word="turn">turn</span> <span word="cancerous">cancerous</span>. <span word="They">They</span> <span word="can">can</span> <span word="also">also</span> <span word="make">make</span> <span word="any">any</span> <span word="existing">existing</span> <span word="tumours">tumours</span> <span word="in">in</span> <span word="the">the</span> <span word="bowel">bowel</span> <span word="grow">grow</span> <span word="larger">larger</span>. <span word="Scientists">Scientists</span> <span word="are">are</span> <span word="investigating">investigating</span> <span word="how">how</span> <span word="the">the</span> <span word="bacteria">bacteria</span> <span word="make">make</span> <span word="their">their</span> <span word="way">way</span> <span word="to">to</span> <span word="the">the</span> <span word="gut">gut</span> <span word="through">through</span> <span word="the">the</span> <span word="bloodstream">bloodstream</span>.</p><p>和正常细胞相比，在恶性肿瘤细胞中发现“梭杆菌”的几率要高几百倍。现在研究人员们已经发现，这种细菌能够使得肠道中的良性肿瘤恶化演变成为癌症。此外，它们还会使得肠道内已经存在的肿瘤生长得更大。目前，科学家们正在研究这种细菌到底是如何通过血液循环进入肠道的。</p>
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