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HEPA COMMUN:从炎症细胞到非酒精性脂肪肝——揭秘脂肪肝的重要成因!

2017-05-17 sunshine2015 来宝网

洛杉矶儿童医院的MBBS,MS的Rohit Kohli领导的一组研究人员确定了涉及非酒精性脂肪肝病的关键炎症细胞。目前的疾病治疗涉及饮食的变化,但没有药物被批准用于治疗。这项研究的结果提供了潜在的治疗目标,并提供了开发治疗的可能性。该研究将于5月16日在肝病学通讯杂志上发表。



洛杉矶儿童医院的MBBS,MS的Rohit Kohli领导的一组研究人员确定了涉及非酒精性脂肪肝病的关键炎症细胞。目前的疾病治疗涉及饮食的变化,但没有药物被批准用于治疗。这项研究的结果提供了潜在的治疗目标,并提供了开发治疗的可能性。该研究将于5月16日在肝病学通讯杂志上发表。

CHLA胃肠病学与肝脏病学和营养部门负责人Kohli说:“肥胖的上升导致了儿童和成人的脂肪肝疾病的流行。 “然而,只有较少数量的这些人会发展出最严重的这种疾病,称为非酒精性脂肪性肝炎或NASH。”

NASH的特征在于肝脏炎症和肝脏过多脂肪沉积引起的损伤。尽管疾病的确切原因仍在调查之中,但发生在肥胖人群中,也可能伴有2型糖尿病,高胆固醇或其他代谢异常。

研究人员进行了一系列实验,以确定饮食如何促进肝脏炎症并进一步发展到NASH。从参与胰岛素抵抗患者发现的脂肪组织炎症的免疫细胞开始,他们试图确定天然杀伤T细胞(NKT)和CD8 T细胞细胞在疾病发展中的作用。

为了模拟西方饮食,小鼠喂食高脂肪、高碳水化合物(HFHC)饮食,而对照动物喂食小鼠食物的传统饮食。 16周后,HFHC饮食上的小鼠显示炎症增加。具体来说,与对照组相比,他们观察到NKT和CD8 T细胞浸润到肝脏中。

为了弄清每种免疫细胞的作用,研究人员重复了缺乏功能性NKT细胞的CD1dKO小鼠的实验。在HFHC饮食16周后,这些小鼠没有变得肥胖或显示进展到NASH,这表明NKT细胞在这些病症的发展中是不可或缺的。在单独的实验中,用针对CD8 T细胞的抗体处理小鼠。具有消耗的CD8T细胞的动物变得肥胖,然而,它们被保护免受NASH。这些动物肝脏中的巨噬细胞数量也较少,纤维化较少。

为了证明这些发现在人类中的相关性,研究人员分析了NASH患者的肝活组织检查,发现CD8 T细胞浸润。尽管没有观察到NKT细胞的浸润,但是研究人员推测,这种细胞群体的变化可能是短暂的。

Keck医学院儿科副教授Kohli说:“我们的研究结果将有助于将注意力集中在对严重肝脏疾病发展至关重要的某些炎症细胞类型上,使我们更接近治疗的发展。”的USC。

原始出处:

Jashdeep Bhattacharjee, Michelle Kirby, Samir Softic et al. Hepatic natural killer T-cell and CD8+ T-cell signatures in mice with nonalcoholic steatohepatitis, Hepatology Communications (2017). DOI: 10.1002/hep4.1041.

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    2018-03-24 liuli5079
  5. [GetPortalCommentsPageByObjectIdResponse(id=2053602, encodeId=b9392053602e2, content=<a href='/topic/show?id=f84e6e055ab' target=_blank style='color:#2F92EE;'>#炎症细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=86, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67055, encryptionId=f84e6e055ab, topicName=炎症细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=03e7496, createdName=楚钟, createdTime=Fri Oct 27 16:27:00 CST 2017, time=2017-10-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1676322, encodeId=df8716e63221e, content=<a href='/topic/show?id=397299e19c7' target=_blank style='color:#2F92EE;'>#非酒精性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=99719, encryptionId=397299e19c7, topicName=非酒精性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=d18c27357544, createdName=Tommy1958, createdTime=Sun Oct 15 10:27:00 CST 2017, time=2017-10-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1673296, encodeId=ccb816e32966a, content=<a href='/topic/show?id=757b954e922' target=_blank style='color:#2F92EE;'>#酒精性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=82, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=95479, encryptionId=757b954e922, topicName=酒精性)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=398f26933958, createdName=huiwelcome, createdTime=Wed Oct 18 04:27:00 CST 2017, time=2017-10-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087024, encodeId=f6bf208e024e6, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Sat Mar 24 01:27:00 CST 2018, time=2018-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1980443, encodeId=fe2919804434d, content=<a href='/topic/show?id=099f9548ed7' target=_blank style='color:#2F92EE;'>#酒精性脂肪肝#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=95487, encryptionId=099f9548ed7, topicName=酒精性脂肪肝)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=26a9200, createdName=yangshch, createdTime=Fri Jul 07 13:27:00 CST 2017, time=2017-07-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=200917, encodeId=d50b20091e73, content=感谢分享一下!!, beContent=null, objectType=article, channel=null, level=null, likeNumber=100, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zMoyicyo6ia9f4IuLQAwZoxD6Hx4ibd5CMcOCYhStY6oDibbKK6O2X8iaicldO5ib8j1iapOIobIKCGiczU2A/0, createdBy=56251941490, createdName=虈亣靌, createdTime=Sun May 21 16:24:39 CST 2017, time=2017-05-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1426729, encodeId=e4ae1426e2916, content=<a href='/topic/show?id=221d685172' target=_blank style='color:#2F92EE;'>#EPA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6851, encryptionId=221d685172, topicName=EPA)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4a9b4077760, createdName=gwc384, createdTime=Fri May 19 00:27:00 CST 2017, time=2017-05-19, status=1, ipAttribution=)]
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    2017-05-21 虈亣靌

    感谢分享一下!!

    0

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    2017-05-19 gwc384

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