GUT: 空肠弯曲杆菌通过细胞致死性扩张毒素的作用促进结直肠肿瘤发生

2018-12-02 MedSci MedSci原创

空肠弯曲杆菌产生细胞致死性扩张毒素(CDT),它具有DNA酶活性并会导致DNA双链断裂。虽然已有文献显示空肠弯曲杆菌感染促进肠道炎症,但这种细菌对致癌作用的影响从未被研究过。

背景及目的
空肠弯曲杆菌产生细胞致死性扩张毒素(CDT),它具有DNA酶活性并会导致DNA双链断裂。虽然已有文献显示空肠弯曲杆菌感染促进肠道炎症,但这种细菌对致癌作用的影响从未被研究过。

方法
研究人员用1%硫酸葡聚糖钠喂养无菌(GF)ApcMin / +小鼠。将细胞和肠细胞暴露于细菌裂解物,通过γH2AX免疫荧光,彗星试验和细胞周期试验确定DNA损伤情况。为了检查产生CDT的空肠弯曲杆菌,肠道微生物组和宿主在肿瘤发生中的相互作用,研究人员同时进行了结肠RNA测序和粪便16S rDNA测序,并使用雷帕霉素以研究预防产生CDT的空肠弯曲杆菌诱导的肿瘤发生。

结果
用分离到的细菌定殖的GF的ApcMin / +小鼠,与未感染的小鼠相比,空肠弯曲杆菌显着出现更多和更大的肿瘤。空肠弯曲杆菌具有突变的cdtB亚基,在体内减弱空肠弯曲杆菌可以减少肿瘤发生并降低细胞和肠内的DNA损伤。最后,雷帕霉素可以降低空肠弯曲杆菌的致瘤能力。

结论
临床分离株C.jejuni 81-176可促进直肠癌的发生并诱导微生物组成和转录组学发生变化。

原始出处:

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
在此留言
评论区 (5)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1684768, encodeId=e5161684e688b, content=<a href='/topic/show?id=794754e74f4' target=_blank style='color:#2F92EE;'>#扩张#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54774, encryptionId=794754e74f4, topicName=扩张)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=699d28086811, createdName=lsj637, createdTime=Sat Sep 14 16:50:00 CST 2019, time=2019-09-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1928683, encodeId=fb1c192868375, content=<a href='/topic/show?id=7257e24943e' target=_blank style='color:#2F92EE;'>#直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72494, encryptionId=7257e24943e, topicName=直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=346311, createdName=bnjfy, createdTime=Tue Jul 30 15:50:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453197, encodeId=32ff145319e7f, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1487780, encodeId=41db148e780d0, content=<a href='/topic/show?id=f364e871840' target=_blank style='color:#2F92EE;'>#结直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78718, encryptionId=f364e871840, topicName=结直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=78398366026, createdName=tamgche, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1568262, encodeId=87851568262a9, content=<a href='/topic/show?id=569d8644eb9' target=_blank style='color:#2F92EE;'>#致死性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86447, encryptionId=569d8644eb9, topicName=致死性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=30bd35, createdName=一叶知秋, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=)]
    2019-09-14 lsj637
  2. [GetPortalCommentsPageByObjectIdResponse(id=1684768, encodeId=e5161684e688b, content=<a href='/topic/show?id=794754e74f4' target=_blank style='color:#2F92EE;'>#扩张#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54774, encryptionId=794754e74f4, topicName=扩张)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=699d28086811, createdName=lsj637, createdTime=Sat Sep 14 16:50:00 CST 2019, time=2019-09-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1928683, encodeId=fb1c192868375, content=<a href='/topic/show?id=7257e24943e' target=_blank style='color:#2F92EE;'>#直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72494, encryptionId=7257e24943e, topicName=直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=346311, createdName=bnjfy, createdTime=Tue Jul 30 15:50:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453197, encodeId=32ff145319e7f, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1487780, encodeId=41db148e780d0, content=<a href='/topic/show?id=f364e871840' target=_blank style='color:#2F92EE;'>#结直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78718, encryptionId=f364e871840, topicName=结直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=78398366026, createdName=tamgche, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1568262, encodeId=87851568262a9, content=<a href='/topic/show?id=569d8644eb9' target=_blank style='color:#2F92EE;'>#致死性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86447, encryptionId=569d8644eb9, topicName=致死性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=30bd35, createdName=一叶知秋, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1684768, encodeId=e5161684e688b, content=<a href='/topic/show?id=794754e74f4' target=_blank style='color:#2F92EE;'>#扩张#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54774, encryptionId=794754e74f4, topicName=扩张)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=699d28086811, createdName=lsj637, createdTime=Sat Sep 14 16:50:00 CST 2019, time=2019-09-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1928683, encodeId=fb1c192868375, content=<a href='/topic/show?id=7257e24943e' target=_blank style='color:#2F92EE;'>#直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72494, encryptionId=7257e24943e, topicName=直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=346311, createdName=bnjfy, createdTime=Tue Jul 30 15:50:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453197, encodeId=32ff145319e7f, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1487780, encodeId=41db148e780d0, content=<a href='/topic/show?id=f364e871840' target=_blank style='color:#2F92EE;'>#结直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78718, encryptionId=f364e871840, topicName=结直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=78398366026, createdName=tamgche, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1568262, encodeId=87851568262a9, content=<a href='/topic/show?id=569d8644eb9' target=_blank style='color:#2F92EE;'>#致死性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86447, encryptionId=569d8644eb9, topicName=致死性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=30bd35, createdName=一叶知秋, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1684768, encodeId=e5161684e688b, content=<a href='/topic/show?id=794754e74f4' target=_blank style='color:#2F92EE;'>#扩张#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54774, encryptionId=794754e74f4, topicName=扩张)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=699d28086811, createdName=lsj637, createdTime=Sat Sep 14 16:50:00 CST 2019, time=2019-09-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1928683, encodeId=fb1c192868375, content=<a href='/topic/show?id=7257e24943e' target=_blank style='color:#2F92EE;'>#直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72494, encryptionId=7257e24943e, topicName=直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=346311, createdName=bnjfy, createdTime=Tue Jul 30 15:50:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453197, encodeId=32ff145319e7f, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1487780, encodeId=41db148e780d0, content=<a href='/topic/show?id=f364e871840' target=_blank style='color:#2F92EE;'>#结直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78718, encryptionId=f364e871840, topicName=结直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=78398366026, createdName=tamgche, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1568262, encodeId=87851568262a9, content=<a href='/topic/show?id=569d8644eb9' target=_blank style='color:#2F92EE;'>#致死性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86447, encryptionId=569d8644eb9, topicName=致死性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=30bd35, createdName=一叶知秋, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=)]
  5. [GetPortalCommentsPageByObjectIdResponse(id=1684768, encodeId=e5161684e688b, content=<a href='/topic/show?id=794754e74f4' target=_blank style='color:#2F92EE;'>#扩张#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=54774, encryptionId=794754e74f4, topicName=扩张)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=699d28086811, createdName=lsj637, createdTime=Sat Sep 14 16:50:00 CST 2019, time=2019-09-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1928683, encodeId=fb1c192868375, content=<a href='/topic/show?id=7257e24943e' target=_blank style='color:#2F92EE;'>#直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72494, encryptionId=7257e24943e, topicName=直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=346311, createdName=bnjfy, createdTime=Tue Jul 30 15:50:00 CST 2019, time=2019-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1453197, encodeId=32ff145319e7f, content=<a href='/topic/show?id=098ee8679ad' target=_blank style='color:#2F92EE;'>#结直肠#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78679, encryptionId=098ee8679ad, topicName=结直肠)], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=9ace5575596, createdName=crystal0564, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1487780, encodeId=41db148e780d0, content=<a href='/topic/show?id=f364e871840' target=_blank style='color:#2F92EE;'>#结直肠肿瘤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78718, encryptionId=f364e871840, topicName=结直肠肿瘤)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=78398366026, createdName=tamgche, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1568262, encodeId=87851568262a9, content=<a href='/topic/show?id=569d8644eb9' target=_blank style='color:#2F92EE;'>#致死性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86447, encryptionId=569d8644eb9, topicName=致死性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=30bd35, createdName=一叶知秋, createdTime=Tue Dec 04 12:50:00 CST 2018, time=2018-12-04, status=1, ipAttribution=)]