J Gastroenterology: 小鼠中IP 3 R1的缺失会导致肠道假性梗阻

2019-05-05 不详 MedSci原创

肌醇1,4,5-三磷酸受体(IP3Rs)是位于内质网膜上的细胞内Ca 2+释放通道家族的一员,已有文献报道其在细胞的生理功能中起关键作用。然而,它们在体内调节胃肠(GI)道运动的功能仍然未知。因此,本项研究旨在使用基因工程小鼠模型研究了胃肠道中IP 3 R1 的生理功能。

背景
肌醇1,4,5-三磷酸受体(IP3Rs)是位于内质网膜上的细胞内Ca 2+释放通道家族的一员,已有文献报道其在细胞的生理功能中起关键作用。然而,它们在体内调节肠(GI)道运动的功能仍然未知。因此,本项研究旨在使用基因工程小鼠模型研究了肠道中IP 3 R1 的生理功能。

方法
研究人员用纯合的Itpr1 floxed(Itpr1 f / f)小鼠与Pdgfrb - Cre小鼠杂交以产生条件性IP 3 R1敲除(pcR1KO)小鼠。使用细胞谱系追踪技术用于确定胃肠道中Pdgfrb - Cre介导的基因缺失发生的位置。等长张力记录用于测量IP 3 R1缺失对肌肉收缩的影响。

结果
在小鼠胃肠道中,Pdgfrb – Cre小鼠的Itpr1基因缺失发生在平滑肌细胞,肠神经元和Cajal的间质细胞中。pcR1KO小鼠发生胃肠动力受损,整个肠道运输时间延长,并有腹胀症状。pcR1KO小鼠早在8周龄时也表现高死亡率,50%的pcR1KO小鼠在出生后40周死亡。结肠环形肌肉自发性收缩的频率显着降低,并且pcR1KO小鼠的自发收缩幅度增加。然而,在PCR1KO小鼠中,KCl诱导的收缩和平滑肌特异性收缩基因的表达没有显着改变。

结论
本项研究为临床研究人员提供了一种新的GI运动受损小鼠模型,并证明IP 3 R1在调节体内胃肠道的生理功能中发挥关键作用。

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 (4)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1711927, encodeId=d34a1e119272a, content=<a href='/topic/show?id=9a1c289680' target=_blank style='color:#2F92EE;'>#AST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2896, encryptionId=9a1c289680, topicName=AST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8b9831894722, createdName=ms24272190615788285182, createdTime=Mon Sep 23 21:55:00 CST 2019, time=2019-09-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2072548, encodeId=35b120e2548a2, content=<a href='/topic/show?id=9d4ee84647' target=_blank style='color:#2F92EE;'>#GAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7846, encryptionId=9d4ee84647, topicName=GAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e2dd327, createdName=许安, createdTime=Sat Mar 07 23:55:00 CST 2020, time=2020-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2064705, encodeId=3bff2064e05bd, content=<a href='/topic/show?id=94ffe853a7' target=_blank style='color:#2F92EE;'>#Gastroenterol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7853, encryptionId=94ffe853a7, topicName=Gastroenterol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0bed488, createdName=jktdtl, createdTime=Wed Aug 07 09:55:00 CST 2019, time=2019-08-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1504663, encodeId=72a4150466314, content=<a href='/topic/show?id=7730e85412' target=_blank style='color:#2F92EE;'>#Gastroenterology#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7854, encryptionId=7730e85412, topicName=Gastroenterology)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5fc29706655, createdName=chaojitidian, createdTime=Tue May 07 02:55:00 CST 2019, time=2019-05-07, status=1, ipAttribution=)]
  2. [GetPortalCommentsPageByObjectIdResponse(id=1711927, encodeId=d34a1e119272a, content=<a href='/topic/show?id=9a1c289680' target=_blank style='color:#2F92EE;'>#AST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2896, encryptionId=9a1c289680, topicName=AST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8b9831894722, createdName=ms24272190615788285182, createdTime=Mon Sep 23 21:55:00 CST 2019, time=2019-09-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2072548, encodeId=35b120e2548a2, content=<a href='/topic/show?id=9d4ee84647' target=_blank style='color:#2F92EE;'>#GAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7846, encryptionId=9d4ee84647, topicName=GAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e2dd327, createdName=许安, createdTime=Sat Mar 07 23:55:00 CST 2020, time=2020-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2064705, encodeId=3bff2064e05bd, content=<a href='/topic/show?id=94ffe853a7' target=_blank style='color:#2F92EE;'>#Gastroenterol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7853, encryptionId=94ffe853a7, topicName=Gastroenterol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0bed488, createdName=jktdtl, createdTime=Wed Aug 07 09:55:00 CST 2019, time=2019-08-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1504663, encodeId=72a4150466314, content=<a href='/topic/show?id=7730e85412' target=_blank style='color:#2F92EE;'>#Gastroenterology#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7854, encryptionId=7730e85412, topicName=Gastroenterology)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5fc29706655, createdName=chaojitidian, createdTime=Tue May 07 02:55:00 CST 2019, time=2019-05-07, status=1, ipAttribution=)]
    2020-03-07 许安
  3. [GetPortalCommentsPageByObjectIdResponse(id=1711927, encodeId=d34a1e119272a, content=<a href='/topic/show?id=9a1c289680' target=_blank style='color:#2F92EE;'>#AST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2896, encryptionId=9a1c289680, topicName=AST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8b9831894722, createdName=ms24272190615788285182, createdTime=Mon Sep 23 21:55:00 CST 2019, time=2019-09-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2072548, encodeId=35b120e2548a2, content=<a href='/topic/show?id=9d4ee84647' target=_blank style='color:#2F92EE;'>#GAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7846, encryptionId=9d4ee84647, topicName=GAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e2dd327, createdName=许安, createdTime=Sat Mar 07 23:55:00 CST 2020, time=2020-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2064705, encodeId=3bff2064e05bd, content=<a href='/topic/show?id=94ffe853a7' target=_blank style='color:#2F92EE;'>#Gastroenterol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7853, encryptionId=94ffe853a7, topicName=Gastroenterol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0bed488, createdName=jktdtl, createdTime=Wed Aug 07 09:55:00 CST 2019, time=2019-08-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1504663, encodeId=72a4150466314, content=<a href='/topic/show?id=7730e85412' target=_blank style='color:#2F92EE;'>#Gastroenterology#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7854, encryptionId=7730e85412, topicName=Gastroenterology)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5fc29706655, createdName=chaojitidian, createdTime=Tue May 07 02:55:00 CST 2019, time=2019-05-07, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1711927, encodeId=d34a1e119272a, content=<a href='/topic/show?id=9a1c289680' target=_blank style='color:#2F92EE;'>#AST#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2896, encryptionId=9a1c289680, topicName=AST)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=8b9831894722, createdName=ms24272190615788285182, createdTime=Mon Sep 23 21:55:00 CST 2019, time=2019-09-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2072548, encodeId=35b120e2548a2, content=<a href='/topic/show?id=9d4ee84647' target=_blank style='color:#2F92EE;'>#GAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7846, encryptionId=9d4ee84647, topicName=GAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e2dd327, createdName=许安, createdTime=Sat Mar 07 23:55:00 CST 2020, time=2020-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2064705, encodeId=3bff2064e05bd, content=<a href='/topic/show?id=94ffe853a7' target=_blank style='color:#2F92EE;'>#Gastroenterol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7853, encryptionId=94ffe853a7, topicName=Gastroenterol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0bed488, createdName=jktdtl, createdTime=Wed Aug 07 09:55:00 CST 2019, time=2019-08-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1504663, encodeId=72a4150466314, content=<a href='/topic/show?id=7730e85412' target=_blank style='color:#2F92EE;'>#Gastroenterology#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=28, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=7854, encryptionId=7730e85412, topicName=Gastroenterology)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5fc29706655, createdName=chaojitidian, createdTime=Tue May 07 02:55:00 CST 2019, time=2019-05-07, status=1, ipAttribution=)]