Cell host Microbe:新发现幽门螺杆菌引起胃癌的两种机制

2017-11-27 佚名 medicalxpress

胃癌是五种最致命的癌症之一。根据世界卫生组织(WHO)的统计数据,每年大约有75万名患者死于该病。主要原因被认为是幽门螺旋杆菌(幽门螺旋杆菌)。目前,对胃癌没有有效的治疗方法,抗生素耐药性的扩散也使治疗更加复杂。目前,FAU的研究人员已经确定了这种细菌会导致胃癌的两种机制。他们的发现可能会导致新的治疗方法的发展。该研究小组在《细胞宿主与微生物学》期刊上发表了研究成果。

胃癌是五种最致命的癌症之一。根据世界卫生组织(WHO)的统计数据,每年大约有75万名患者死于该病。主要原因被认为是幽门螺旋杆菌(幽门螺旋杆菌)。目前,对胃癌没有有效的治疗方法,抗生素耐药性的扩散也使治疗更加复杂。目前,FAU的研究人员已经确定了这种细菌会导致胃癌的两种机制。他们的发现可能会导致新的治疗方法的发展。该研究小组在《细胞宿主与微生物学》期刊上发表了研究成果。

由弗里德-亚历山大大学的微生物学主席尼科尔·特格特梅尔博士领导的国际科学家小组调查了细菌是如何破坏胃的保护层的。这种保护层由密集的上皮细胞组成,保护胃不受胃酸的影响。研究人员现在发现,幽门螺杆菌可以分泌一种酶,一种叫HtrA的蛋白酶,它很像一种武器,可以穿透这种保护层。 HtrA切割三种蛋白occludin,claudin-8和E-钙粘蛋白,破坏上皮细胞层。结果,幽门螺旋杆菌可以进入更深的、正常的无病原组织层,并造成进一步的损害。这是胃癌开始发展的第一步。

然而,在第一个阶段,随之而来的是更危险的,正如团队所发现的那样。针状突起,被称为IV型分泌物系统,被激活并作为“分子注射器”功能。利用受体依赖机制,这些细胞通过宿主细胞的基底外侧膜注入细菌毒素CagA蛋白。被注射的CagA随后重新规划宿主细胞,使它们有可能发生癌变。这种蛋白质的另一个作用是,它阻止人类免疫系统识别和消灭细菌——这是人类胃中幽门螺杆菌长期生存的关键机制。

Tegtmeyer博士预计,这些发现将使开发新的重要的抗菌治疗方法成为可能,因为HtrA和CagA是理想的新型药物靶标。研究小组已经开始测试特定的HtrA抑制剂。Tegtmeyer解释说:“我们希望合适的活性药物能够完全预防感染或抑制CagA的注射。”

原始出处:

Nicole Tegtmeyer, Silja Wessler, Vittorio Necchi, et.al. Helicobacter pylori Employs a Unique Basolateral Type IV Secretion Mechanism for CagA Delivery. Cell host & Microbe

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    2017-12-19 维他命
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    2018-02-01 kcb069
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  5. [GetPortalCommentsPageByObjectIdResponse(id=1870299, encodeId=b16618e0299ac, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Mon Mar 12 18:09:00 CST 2018, time=2018-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960564, encodeId=b635196056490, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Tue Dec 19 21:09:00 CST 2017, time=2017-12-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1811738, encodeId=a1ec1811e38bc, content=<a href='/topic/show?id=751f8889423' target=_blank style='color:#2F92EE;'>#螺杆菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88894, encryptionId=751f8889423, topicName=螺杆菌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=87b1109, createdName=kcb069, createdTime=Thu Feb 01 17:09:00 CST 2018, time=2018-02-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1857530, encodeId=af29185e530d2, content=<a href='/topic/show?id=3f48525849' target=_blank style='color:#2F92EE;'>#CRO#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5258, encryptionId=3f48525849, topicName=CRO)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c30265, createdName=jiafufeng@yaho, createdTime=Fri Jul 06 02:09:00 CST 2018, time=2018-07-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1921206, encodeId=e2ef19212065c, content=<a href='/topic/show?id=6bfa58133ef' target=_blank style='color:#2F92EE;'>#新发现#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58133, encryptionId=6bfa58133ef, topicName=新发现)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=644e456, createdName=vera_1203, createdTime=Mon Aug 20 17:09:00 CST 2018, time=2018-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2084292, encodeId=996e208429252, content=<a href='/topic/show?id=61f411e013b' target=_blank style='color:#2F92EE;'>#Micro#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11701, encryptionId=61f411e013b, topicName=Micro)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d59291, createdName=xjy02, createdTime=Wed Jan 10 21:09:00 CST 2018, time=2018-01-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264971, encodeId=95f02649e19c, content=学习了.谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Tue Nov 28 07:38:24 CST 2017, time=2017-11-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264760, encodeId=e317264e6019, content=学习.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/aLGWoFXAyMbIu3qymFOyhb9xDeHojCicsdRdyC3XXdGk2ib9yLypZuHN06WeW4HO8WN0GGrgEfvnTX8gsckof05GHOU5OM4Mvx/0, createdBy=9cee1982656, createdName=执着追梦, createdTime=Mon Nov 27 13:01:14 CST 2017, time=2017-11-27, status=1, ipAttribution=)]
  6. [GetPortalCommentsPageByObjectIdResponse(id=1870299, encodeId=b16618e0299ac, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Mon Mar 12 18:09:00 CST 2018, time=2018-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960564, encodeId=b635196056490, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Tue Dec 19 21:09:00 CST 2017, time=2017-12-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1811738, encodeId=a1ec1811e38bc, content=<a href='/topic/show?id=751f8889423' target=_blank style='color:#2F92EE;'>#螺杆菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88894, encryptionId=751f8889423, topicName=螺杆菌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=87b1109, createdName=kcb069, createdTime=Thu Feb 01 17:09:00 CST 2018, time=2018-02-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1857530, encodeId=af29185e530d2, content=<a href='/topic/show?id=3f48525849' target=_blank style='color:#2F92EE;'>#CRO#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5258, encryptionId=3f48525849, topicName=CRO)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c30265, createdName=jiafufeng@yaho, createdTime=Fri Jul 06 02:09:00 CST 2018, time=2018-07-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1921206, encodeId=e2ef19212065c, content=<a href='/topic/show?id=6bfa58133ef' target=_blank style='color:#2F92EE;'>#新发现#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58133, encryptionId=6bfa58133ef, topicName=新发现)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=644e456, createdName=vera_1203, createdTime=Mon Aug 20 17:09:00 CST 2018, time=2018-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2084292, encodeId=996e208429252, content=<a href='/topic/show?id=61f411e013b' target=_blank style='color:#2F92EE;'>#Micro#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11701, encryptionId=61f411e013b, topicName=Micro)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d59291, createdName=xjy02, createdTime=Wed Jan 10 21:09:00 CST 2018, time=2018-01-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264971, encodeId=95f02649e19c, content=学习了.谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Tue Nov 28 07:38:24 CST 2017, time=2017-11-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264760, encodeId=e317264e6019, content=学习.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/aLGWoFXAyMbIu3qymFOyhb9xDeHojCicsdRdyC3XXdGk2ib9yLypZuHN06WeW4HO8WN0GGrgEfvnTX8gsckof05GHOU5OM4Mvx/0, createdBy=9cee1982656, createdName=执着追梦, createdTime=Mon Nov 27 13:01:14 CST 2017, time=2017-11-27, status=1, ipAttribution=)]
    2018-01-10 xjy02
  7. [GetPortalCommentsPageByObjectIdResponse(id=1870299, encodeId=b16618e0299ac, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Mon Mar 12 18:09:00 CST 2018, time=2018-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960564, encodeId=b635196056490, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Tue Dec 19 21:09:00 CST 2017, time=2017-12-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1811738, encodeId=a1ec1811e38bc, content=<a href='/topic/show?id=751f8889423' target=_blank style='color:#2F92EE;'>#螺杆菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88894, encryptionId=751f8889423, topicName=螺杆菌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=87b1109, createdName=kcb069, createdTime=Thu Feb 01 17:09:00 CST 2018, time=2018-02-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1857530, encodeId=af29185e530d2, content=<a href='/topic/show?id=3f48525849' target=_blank style='color:#2F92EE;'>#CRO#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5258, encryptionId=3f48525849, topicName=CRO)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c30265, createdName=jiafufeng@yaho, createdTime=Fri Jul 06 02:09:00 CST 2018, time=2018-07-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1921206, encodeId=e2ef19212065c, content=<a href='/topic/show?id=6bfa58133ef' target=_blank style='color:#2F92EE;'>#新发现#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58133, encryptionId=6bfa58133ef, topicName=新发现)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=644e456, createdName=vera_1203, createdTime=Mon Aug 20 17:09:00 CST 2018, time=2018-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2084292, encodeId=996e208429252, content=<a href='/topic/show?id=61f411e013b' target=_blank style='color:#2F92EE;'>#Micro#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11701, encryptionId=61f411e013b, topicName=Micro)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d59291, createdName=xjy02, createdTime=Wed Jan 10 21:09:00 CST 2018, time=2018-01-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264971, encodeId=95f02649e19c, content=学习了.谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Tue Nov 28 07:38:24 CST 2017, time=2017-11-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264760, encodeId=e317264e6019, content=学习.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/aLGWoFXAyMbIu3qymFOyhb9xDeHojCicsdRdyC3XXdGk2ib9yLypZuHN06WeW4HO8WN0GGrgEfvnTX8gsckof05GHOU5OM4Mvx/0, createdBy=9cee1982656, createdName=执着追梦, createdTime=Mon Nov 27 13:01:14 CST 2017, time=2017-11-27, status=1, ipAttribution=)]
    2017-11-28 1209e435m98(暂无昵称)

    学习了.谢谢分享!

    0

  8. [GetPortalCommentsPageByObjectIdResponse(id=1870299, encodeId=b16618e0299ac, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Mon Mar 12 18:09:00 CST 2018, time=2018-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960564, encodeId=b635196056490, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Tue Dec 19 21:09:00 CST 2017, time=2017-12-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1811738, encodeId=a1ec1811e38bc, content=<a href='/topic/show?id=751f8889423' target=_blank style='color:#2F92EE;'>#螺杆菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88894, encryptionId=751f8889423, topicName=螺杆菌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=87b1109, createdName=kcb069, createdTime=Thu Feb 01 17:09:00 CST 2018, time=2018-02-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1857530, encodeId=af29185e530d2, content=<a href='/topic/show?id=3f48525849' target=_blank style='color:#2F92EE;'>#CRO#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5258, encryptionId=3f48525849, topicName=CRO)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c30265, createdName=jiafufeng@yaho, createdTime=Fri Jul 06 02:09:00 CST 2018, time=2018-07-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1921206, encodeId=e2ef19212065c, content=<a href='/topic/show?id=6bfa58133ef' target=_blank style='color:#2F92EE;'>#新发现#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58133, encryptionId=6bfa58133ef, topicName=新发现)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=644e456, createdName=vera_1203, createdTime=Mon Aug 20 17:09:00 CST 2018, time=2018-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2084292, encodeId=996e208429252, content=<a href='/topic/show?id=61f411e013b' target=_blank style='color:#2F92EE;'>#Micro#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11701, encryptionId=61f411e013b, topicName=Micro)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d59291, createdName=xjy02, createdTime=Wed Jan 10 21:09:00 CST 2018, time=2018-01-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264971, encodeId=95f02649e19c, content=学习了.谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Tue Nov 28 07:38:24 CST 2017, time=2017-11-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=264760, encodeId=e317264e6019, content=学习.谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/aLGWoFXAyMbIu3qymFOyhb9xDeHojCicsdRdyC3XXdGk2ib9yLypZuHN06WeW4HO8WN0GGrgEfvnTX8gsckof05GHOU5OM4Mvx/0, createdBy=9cee1982656, createdName=执着追梦, createdTime=Mon Nov 27 13:01:14 CST 2017, time=2017-11-27, status=1, ipAttribution=)]
    2017-11-27 执着追梦

    学习.谢谢分享

    0

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