Cell子刊:同样是胖子为何有人不得糖尿病?

2016-11-06 佚名 生物谷

几年以前,科学家们就已经发现有些瘦人最终也会得糖尿病,而一些比较胖的人反而能一直保持健康。现在来自犹他大学健康学院的科学家们发现了这一谜题的一个可能答案:一类具有毒性的脂肪代谢产物——神经酰胺——可能会让人易患2型糖尿病。相关研究结果发表在国际学术期刊Cell Metabolism上,该研究发现神经酰胺的积累会影响脂肪组织的正常功能。当人们吃的过多,体内就会产生过量的脂肪酸,有些脂肪酸能够储存为甘

几年以前,科学家们就已经发现有些瘦人最终也会得糖尿病,而一些比较胖的人反而能一直保持健康。现在来自犹他大学健康学院的科学家们发现了这一谜题的一个可能答案:一类具有毒性的脂肪代谢产物——神经酰胺——可能会让人易患2型糖尿病


相关研究结果发表在国际学术期刊Cell Metabolism上,该研究发现神经酰胺的积累会影响脂肪组织的正常功能。


当人们吃的过多,体内就会产生过量的脂肪酸,有些脂肪酸能够储存为甘油三酯,或者作为能量燃烧掉,而对于有些人来说,脂肪酸还会变成神经酰胺。当神经酰胺过量积累,脂肪组织停止正常工作,无法储存到脂肪组织中的脂肪就会进入血管系统和心脏还会对其他外周组织造成损伤。


该研究发现将过多的神经酰胺添加到人类脂肪细胞或小鼠体内会引起对胰岛素的反应出现迟钝,并进一步发展为能量消耗能力的损伤。小鼠也更容易发展为糖尿病和脂肪肝。


与之相反,研究人员在小鼠模型体内通过基因工程技术敲除了将饱和脂肪酸变成神经酰胺的关键基因结果发现降低小鼠脂肪组织内神经酰胺的含量能够保护小鼠避免出现胰岛素抵抗。


这些结果表明神经酰胺的积累可能增加糖尿病风险,而降低其水平则可以避免这种疾病。研究人员认为,这种现象在人类身上可能也同样存在。事实上通过对接受了减重手术的病人进行研究发现神经酰胺水平能够更好地预测糖尿病发生,甚至好于肥胖指标。虽然所有病人都处于肥胖状态,但那些没有患2型糖尿病的肥胖病人其脂肪组织内神经酰胺水平要低于诊断为2型糖尿病的肥胖病人。


研究人员还在寻找可能导致神经酰胺异常积累,并进一步发展为肥胖和2型糖尿病的基因突变。基于该研究,科学家们提出由于神经酰胺的积累,负责脂肪燃烧的棕色脂肪和米色脂肪组织可能失去了棕色脂肪的特性,甚至出现白色化,这进一步促进了导致疾病发生的一系列事件。


综上所述,该研究提示通过阻断脂肪组织内神经酰胺合成,或可防止2型糖尿病或其他代谢疾病的发生。


原始出处:

Bhagirath Chaurasia1, 14, 15, 16, , , Vincent Andre Kaddai1, 14, Graeme Iain Lancaster1, Darren C. Henstridge2, Sandhya Sriram3, Dwight Lark Anolin Galam4, Venkatesh Gopalan5, K.N. Bhanu Prakash5, S. Sendhil Velan5, Sarada Bulchand6, Teh Jing Tsong7, Mei Wang7, Monowarul Mobin Siddique8, Guan Yuguang4, Kristmundur Sigmundsson4, Natalie A. Mellet9, Jacquelyn M. Weir9, Peter J. Meikle9, M. Shabeer Bin M. Yassin10, Asim Shabbir11, James A. Shayman12, Yoshio Hirabayashi13, Sue-Anne Toh Ee Shiow10, Shigeki Sugii3, 4, Scott A. Summers1, 15.Adipocyte Ceramides Regulate Subcutaneous Adipose Browning, Inflammation, and Metabolism.J.cmet.2016.10.002 

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    2017-07-10 维他命
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    2016-11-07 李东泽

    很好,不错,以后会多学习

    0

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    2016-11-07 李东泽

    很好,不错,以后会多学习

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1869620, encodeId=5fc518696202d, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=46, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Sun Mar 05 10:17:00 CST 2017, time=2017-03-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1959879, encodeId=a98d19598e906, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, 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=Mon Jul 10 13:17:00 CST 2017, time=2017-07-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=154045, encodeId=efb2154045b2, content=很好,不错,以后会多学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzUn81b5CF5ibVPib8jWI92iciaxmqGHlwruOnK4SVZykd4iahqo1hicklIibyZoxm55X7EM8BW9eX1h1hQ2/0, createdBy=8aa81937526, createdName=李东泽, createdTime=Mon Nov 07 09:34:48 CST 2016, time=2016-11-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=153976, encodeId=c6cb1539e65a, content=很好,不错,以后会多学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzUn81b5CF5ibVPib8jWI92iciaxmqGHlwruOnK4SVZykd4iahqo1hicklIibyZoxm55X7EM8BW9eX1h1hQ2/0, createdBy=8aa81937526, createdName=李东泽, createdTime=Mon Nov 07 08:26:47 CST 2016, time=2016-11-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=153950, encodeId=7aa215395034, content=关注。谢谢编辑。值得学习。, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=01bb1684217, createdName=医张生, createdTime=Mon Nov 07 07:25:11 CST 2016, time=2016-11-07, status=1, ipAttribution=)]
    2016-11-07 医张生

    关注。谢谢编辑。值得学习。

    0

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BMJ:这张脚部平片,您能发现什么?——案例报道

患者女,59岁,有糖尿病,左足肿胀、红斑、疼痛。患者的症状在几个月内恶化。近期没有创伤史。平片如下。根据描述和平片,您的诊断是什么?答案:神经性骨关节病,有时也被称为Charcot足。看下图,“S”箭头处软骨下囊肿明显,“T”箭头处是软骨下骨硬化。广泛存在畸形,关节完整性丧失,尤其是舟楔关节。舟骨远端严重破坏已经消退为内侧楔骨(“C”处),中间和外侧楔骨发生横向位移。影响外周神经系统、可导致Cha

头号都市病,看你有没有!

你知道吗?这些常见的坏习惯都是“肝脏杀手”,尤其容易招来“头号都市病”之称的脂肪肝!但早期脂肪肝症状不明显,很难引起人们的重视。肝病专家为你全面解读脂肪肝↓↓收藏,转给家人!

CELL MET:同样是胖子为何有人不得糖尿病?Cell子刊给出新答案

几年以前,科学家们就已经发现有些瘦人最终也会得糖尿病,而一些比较胖的人反而能一直保持健康。现在来自犹他大学健康学院的科学家们发现了这一谜题的一个可能答案:一类具有毒性的脂肪代谢产物——神经酰胺——可能会让人易患2型糖尿病。相关研究结果发表在国际学术期刊Cell Metabolism上,该研究发现神经酰胺的积累会影响脂肪组织的正常功能。当人们吃的过多,体内就会产生过量的脂肪酸,有些脂肪酸能够储存为甘