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Crit Care Med:脓毒症患者记忆B细胞会出现活化相关的加速凋亡!

2017-03-21 xing.T MedSci原创

由此可见,耗竭记忆B细胞有助于脓毒症引起的免疫抑制。针对逆转这一免疫记忆耗竭的治疗值得进一步调查研究。

脓毒症是威胁生命的器官功能障碍,由于宿主对感染的反应失调。目前,脓毒症患者体内B细胞改变的数据较少。近日,危重病医学领域权威杂志Critical Care Medicine上发表了一篇研究文章,研究人员检测了一个假设,即脓毒症患者体内B细胞丢失涉及了B细胞的不同亚群并且调查了B细胞耗竭的机制。

该研究是在重症监护病房完成的前瞻性队列研究,参与者为成年脓毒症患者且无任何记录的免疫疾病。

研究人员通过流式细胞仪测定B细胞亚群;应用膜联蛋白V状态来识别凋亡细胞以及胞内激酶磷酸化被用于识别B细胞亚群的激活状态,测定B细胞特异性生存配体浓度。采用微阵列技术测定纯化的B细胞基因表达,比较了脓毒症患者与健康对照者mRNA丰度的差异。

在入院是74.2%的患者出现淋巴细胞减少与较低的绝对B细胞计数(中位数[间距范围]为0.133 [0.093-0.277]X109个细胞/L)和选择性清除记忆B细胞相关,尽管B细胞存活配体浓度正常。更多的分类开关细胞和IgM记忆细胞凋亡耗竭与细胞外信号调节激酶的磷酸化相关,这意味着为外部驱动的淋巴细胞应激和激活相关的细胞死亡。这一推断可以被基因表达谱突出线粒体功能障碍和细胞死亡途径所佐证,这些细胞死亡途径富含内在和外在通路的凋亡基因。

由此可见,耗竭记忆B细胞有助于脓毒症引起的免疫抑制。针对逆转这一免疫记忆耗竭的治疗值得进一步调查研究。

原始出处:

Shankar-Hari,, et al. Activation-Associated Accelerated Apoptosis of Memory B Cells in Critically Ill Patients With Sepsis.Critical Care Medicine.2017.http://journals.lww.com/ccmjournal/Abstract/publishahead/Activation_Associated_Accelerated_Apoptosis_of.96682.aspx

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  5. [GetPortalCommentsPageByObjectIdResponse(id=1663636, encodeId=b1a0166363602, content=<a href='/topic/show?id=8dc291315b4' target=_blank style='color:#2F92EE;'>#记忆B细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=91315, encryptionId=8dc291315b4, topicName=记忆B细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=855025645731, createdName=ms8543593053280928, createdTime=Tue Jul 25 08:00:00 CST 2017, time=2017-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1273188, encodeId=a23312e3188a5, content=<a href='/topic/show?id=310d383ef5' target=_blank style='color:#2F92EE;'>#B细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3837, encryptionId=310d383ef5, topicName=B细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6eba113, createdName=xiaoyeshuang, createdTime=Thu Mar 23 12:00:00 CST 2017, time=2017-03-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1516343, encodeId=6ae41516343fb, content=<a href='/topic/show?id=a5598519866' target=_blank style='color:#2F92EE;'>#脓毒症患者#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=85198, encryptionId=a5598519866, topicName=脓毒症患者)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=dd7310955580, createdName=dlwang_26703130, createdTime=Thu Mar 23 12:00:00 CST 2017, time=2017-03-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1607319, encodeId=57cb160e31911, content=<a href='/topic/show?id=eb6b1145939' target=_blank style='color:#2F92EE;'>#Med#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11459, encryptionId=eb6b1145939, topicName=Med)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=552a19396740, createdName=ms3994565386320060, createdTime=Thu Mar 23 12:00:00 CST 2017, time=2017-03-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=182002, encodeId=12ba18200244, content=非常好的研究, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7LIiaRZTzJ3SEfiauCzTMPW7YvPPYLNJBXG9oh6Al1icq2VQQkIHWxqXehcicTS62YKJVBhxeth3wggw/0, createdBy=7ce01621306, createdName=天涯183, createdTime=Wed Mar 22 23:00:26 CST 2017, time=2017-03-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=181756, encodeId=a252181e564c, content=涨知识,值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220115/46bcf39c32de4aa6b45c5f9d66c8ee77/6cb4a20c55bb4b7691122f47747bfca2.jpg, createdBy=9dad1662329, createdName=1ddf0692m34(暂无匿称), createdTime=Tue Mar 21 22:50:28 CST 2017, time=2017-03-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=181747, encodeId=87e3181e47d4, content=优质资源,值得收藏, beContent=null, objectType=article, channel=null, level=null, likeNumber=95, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib06iaV3D9Tg5K0LqDY57Aia0TOQByoJhNt3icm4sfukp500hLH6RHOpFdV01NbECtAV7s0qKpQPibyRukQAwAmqJU3X/0, createdBy=f91f1928792, createdName=九九消寒, createdTime=Tue Mar 21 21:33:49 CST 2017, time=2017-03-21, status=1, ipAttribution=)]
    2017-03-22 天涯183

    非常好的研究

    0

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    2017-03-21 1ddf0692m34(暂无匿称)

    涨知识,值得学习

    0

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    2017-03-21 九九消寒

    优质资源,值得收藏

    0

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近期,一项发表在杂志Crit Care Med上的研究前瞻性地评估了败血症患者中,降钙素原水平在基线和第4天之间未能降低超过80%与患者28天全因死亡率增加的相关性。此项研究为盲法前瞻性多中心观察性临床试验,遵循食品和药物管理局批准的协议。此项研究在美国的十三个急诊科和ICU中进行。受试人群为符合严重脓毒症或败血性休克标准的患者,这些患者从急诊部,其他病房或直接从医院获准进入ICU。在最初5天中每

Crit Care Med:脓毒症患者解热治疗对死亡率有啥影响?

由此可见,解热药并不能显著改善成年脓毒症患者28天/住院死亡率。

汇总:近期脓毒症重大研究成果进展

脓毒症是一种危及生命的疾病,是由感染引起的全身炎症反应综合征,机体的炎症反应伤及自身组织和器官。每年美国有超过230000名患者出现脓毒症,且他们最初是在在急诊科接受护理。尽管医护人员拼尽全力,仍有1/5的患者最后不幸死亡。医生必须能够快速诊断患者是否出现脓毒症,并及时治疗,不得延迟。他们必须精通不同的治疗方法,并且在不同的感染性休克类型下,患者很可能会得到最好的治疗并存活下来。事实证明,脓毒

Stroke:脓毒症住院患者发生急性脑卒中风险高吗?

脓毒症后脑卒中发生风险较高,并且风险持续长达一年。年轻的脓毒症患者在脓毒症后脑卒中发生风险明显升高。

JAHA:慢性肾脏疾病脓毒症幸存者长期心血管事件风险如何?

该研究结果突出了在慢性肾脏病幸存者中脓毒症与显著增加的长期心血管事件风险相关。

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