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J Gen Physiol: 何时该排尿,膀胱有话说

2016-04-08 佚名 生物谷

佛蒙特大学医学院的研究人员的新发现,有助于解释我们如何知道什么时候该排空膀胱,并有助于发现膀胱功能性障碍治疗的新方法。 感知膀胱充盈看起来简单,肾脏将废物和多余的水分送到膀胱,直到达到它的充盈阈值,膀胱就告诉中枢神经系统:该排尿了。该研究小组领导者MarkNelson博士发现,除了充盈压力,过程中还有被称为"非排尿瞬时收缩(transientcontractions,TCs)"的膀胱平滑肌

佛蒙特大学医学院的研究人员的新发现,有助于解释我们如何知道什么时候该排空膀胱,并有助于发现膀胱功能性障碍治疗的新方法。

感知膀胱充盈看起来简单,肾脏将废物和多余的水分送到膀胱,直到达到它的充盈阈值,膀胱就告诉中枢神经系统:该排尿了。该研究小组领导者MarkNelson博士发现,除了充盈压力,过程中还有被称为"非排尿瞬时收缩(transientcontractions,TCs)"的膀胱平滑肌收缩。膀胱平滑肌的瞬时收缩是充盈时传入神经活动的推力。这项研究刊登在4月发行的JournalofGeneralPhysiology杂志中。

TCs在感知压力和传递信号给感觉神经末梢的过程中起主导作用。TCs不仅给出膀胱何时充盈的信息,还提醒我们什么时候是排尿的最佳情形。所以研究人员得出结论,TCs是治疗膀胱功能障碍的新靶点。"TCs的有无、收缩发生的速度是导致膀胱活动过多或活动不足的原因。"Nelson博士说。

Nelson与同事们利用小鼠模型,探索了充盈压力、TCs诱导的瞬时压力对感觉神经刺激的相对贡献。他们发现,有固定的压力增长时,TCs比充盈压力诱导的感觉神经活动强10倍。研究人员认为,TCs在正常膀胱压力情况下的膀胱感知中起到主要份额。

尽管充盈压力并不影响TCs频率,但会影响达到最大承受压力的速度。后者的特点反应膀胱迫肌平滑肌的长度-张力关系的变化,而这是决定肌肉收缩效率的重要生理属性。这就意味着,TCs上升速率不仅告诉大脑膀胱的充盈情况,还告诉大脑,膀胱肌肉是否充分收缩以正常排尿。另外,他们发现,不管抑制小还是大电导钙激活的钾通道(SK和BK)--两者都对帮助放松平滑肌起重要作用--都能增加TC振幅和感官神经活动。

下一步,研究人员指出,是找到决定TCs提高的频率和速度的机制。"瞬时收缩在不同膀胱中表现不同",Nelson博士说,"至少在我们的实验中,频率是为某只动物或某个人特设的。看起来它们可以微调以得到最优反应"。

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  1. [GetPortalCommentsPageByObjectIdResponse(id=1788783, encodeId=6fe41e8878382, content=<a href='/topic/show?id=866d1421e4c' target=_blank style='color:#2F92EE;'>#Physio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14217, encryptionId=866d1421e4c, topicName=Physio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c689267, createdName=cmj8wellington, createdTime=Tue Jun 21 21:26:00 CST 2016, time=2016-06-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78229, encodeId=8167e82297a, content=文章不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=168, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78230, encodeId=a865e823050, content=d值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=117, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76630, encodeId=0c08e663070, content=进一步深入,简单的排尿,却走着复杂的作用机制。, beContent=null, objectType=article, channel=null, level=null, likeNumber=116, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160313/IMG56E50DEC424F44672.jpg, createdBy=ce5b1699635, createdName=Lisa971, createdTime=Sun Apr 10 00:46:00 CST 2016, time=2016-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76426, encodeId=770ce642612, content=排尿不简单, beContent=null, objectType=article, channel=null, level=null, likeNumber=154, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK29w9r0upRgxUXHNhe7bd3VxHnhBSpibMbKOjtX92zXr78SkuZfUNuADrjHiaw6uibZaEYjh9cJLzew/132, createdBy=261e1682638, createdName=1de3b290m83(暂无匿称), createdTime=Fri Apr 08 19:40:00 CST 2016, time=2016-04-08, status=1, ipAttribution=)]
  2. [GetPortalCommentsPageByObjectIdResponse(id=1788783, encodeId=6fe41e8878382, content=<a href='/topic/show?id=866d1421e4c' target=_blank style='color:#2F92EE;'>#Physio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14217, encryptionId=866d1421e4c, topicName=Physio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c689267, createdName=cmj8wellington, createdTime=Tue Jun 21 21:26:00 CST 2016, time=2016-06-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78229, encodeId=8167e82297a, content=文章不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=168, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78230, encodeId=a865e823050, content=d值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=117, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76630, encodeId=0c08e663070, content=进一步深入,简单的排尿,却走着复杂的作用机制。, beContent=null, objectType=article, channel=null, level=null, likeNumber=116, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160313/IMG56E50DEC424F44672.jpg, createdBy=ce5b1699635, createdName=Lisa971, createdTime=Sun Apr 10 00:46:00 CST 2016, time=2016-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76426, encodeId=770ce642612, content=排尿不简单, beContent=null, objectType=article, channel=null, level=null, likeNumber=154, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK29w9r0upRgxUXHNhe7bd3VxHnhBSpibMbKOjtX92zXr78SkuZfUNuADrjHiaw6uibZaEYjh9cJLzew/132, createdBy=261e1682638, createdName=1de3b290m83(暂无匿称), createdTime=Fri Apr 08 19:40:00 CST 2016, time=2016-04-08, status=1, ipAttribution=)]
    2016-04-14 李继凯

    文章不错

    0

  3. [GetPortalCommentsPageByObjectIdResponse(id=1788783, encodeId=6fe41e8878382, content=<a href='/topic/show?id=866d1421e4c' target=_blank style='color:#2F92EE;'>#Physio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14217, encryptionId=866d1421e4c, topicName=Physio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c689267, createdName=cmj8wellington, createdTime=Tue Jun 21 21:26:00 CST 2016, time=2016-06-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78229, encodeId=8167e82297a, content=文章不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=168, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78230, encodeId=a865e823050, content=d值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=117, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76630, encodeId=0c08e663070, content=进一步深入,简单的排尿,却走着复杂的作用机制。, beContent=null, objectType=article, channel=null, level=null, likeNumber=116, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160313/IMG56E50DEC424F44672.jpg, createdBy=ce5b1699635, createdName=Lisa971, createdTime=Sun Apr 10 00:46:00 CST 2016, time=2016-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76426, encodeId=770ce642612, content=排尿不简单, beContent=null, objectType=article, channel=null, level=null, likeNumber=154, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK29w9r0upRgxUXHNhe7bd3VxHnhBSpibMbKOjtX92zXr78SkuZfUNuADrjHiaw6uibZaEYjh9cJLzew/132, createdBy=261e1682638, createdName=1de3b290m83(暂无匿称), createdTime=Fri Apr 08 19:40:00 CST 2016, time=2016-04-08, status=1, ipAttribution=)]
    2016-04-14 李继凯

    d值得学习

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=1788783, encodeId=6fe41e8878382, content=<a href='/topic/show?id=866d1421e4c' target=_blank style='color:#2F92EE;'>#Physio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14217, encryptionId=866d1421e4c, topicName=Physio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c689267, createdName=cmj8wellington, createdTime=Tue Jun 21 21:26:00 CST 2016, time=2016-06-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78229, encodeId=8167e82297a, content=文章不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=168, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78230, encodeId=a865e823050, content=d值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=117, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76630, encodeId=0c08e663070, content=进一步深入,简单的排尿,却走着复杂的作用机制。, beContent=null, objectType=article, channel=null, level=null, likeNumber=116, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160313/IMG56E50DEC424F44672.jpg, createdBy=ce5b1699635, createdName=Lisa971, createdTime=Sun Apr 10 00:46:00 CST 2016, time=2016-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76426, encodeId=770ce642612, content=排尿不简单, beContent=null, objectType=article, channel=null, level=null, likeNumber=154, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK29w9r0upRgxUXHNhe7bd3VxHnhBSpibMbKOjtX92zXr78SkuZfUNuADrjHiaw6uibZaEYjh9cJLzew/132, createdBy=261e1682638, createdName=1de3b290m83(暂无匿称), createdTime=Fri Apr 08 19:40:00 CST 2016, time=2016-04-08, status=1, ipAttribution=)]
    2016-04-10 Lisa971

    进一步深入,简单的排尿,却走着复杂的作用机制。

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1788783, encodeId=6fe41e8878382, content=<a href='/topic/show?id=866d1421e4c' target=_blank style='color:#2F92EE;'>#Physio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14217, encryptionId=866d1421e4c, topicName=Physio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c689267, createdName=cmj8wellington, createdTime=Tue Jun 21 21:26:00 CST 2016, time=2016-06-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78229, encodeId=8167e82297a, content=文章不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=168, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=78230, encodeId=a865e823050, content=d值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=117, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=240a1683959, createdName=李继凯, createdTime=Thu Apr 14 18:47:00 CST 2016, time=2016-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76630, encodeId=0c08e663070, content=进一步深入,简单的排尿,却走着复杂的作用机制。, beContent=null, objectType=article, channel=null, level=null, likeNumber=116, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160313/IMG56E50DEC424F44672.jpg, createdBy=ce5b1699635, createdName=Lisa971, createdTime=Sun Apr 10 00:46:00 CST 2016, time=2016-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=76426, encodeId=770ce642612, content=排尿不简单, beContent=null, objectType=article, channel=null, level=null, likeNumber=154, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK29w9r0upRgxUXHNhe7bd3VxHnhBSpibMbKOjtX92zXr78SkuZfUNuADrjHiaw6uibZaEYjh9cJLzew/132, createdBy=261e1682638, createdName=1de3b290m83(暂无匿称), createdTime=Fri Apr 08 19:40:00 CST 2016, time=2016-04-08, status=1, ipAttribution=)]
    2016-04-08 1de3b290m83(暂无匿称)

    排尿不简单

    0

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