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Nat Commun:发现导致脂肪肝的途径

2019-04-15 不详 中国生物技术网

近日,来自瑞典卡罗林斯卡研究所的科学家们发现了一种蛋白质,它是小鼠脂肪肝疾病发展的关键调节因子。对患者肝脏活检的分析表明,所确定的机制可能有助于解释患者发展为更严重脂肪肝疾病的不同易感性。这项研究4月11日已发表在《Nature Communications》上。

近日,来自瑞典卡罗林斯卡研究所的科学家们发现了一种蛋白质,它是小鼠脂肪肝疾病发展的关键调节因子。对患者肝脏活检的分析表明,所确定的机制可能有助于解释患者发展为更严重脂肪肝疾病的不同易感性。这项研究4月11日已发表在《Nature Communications》上。

非酒精性脂肪肝(NAFLD)是一种脂肪在肝脏堆积的疾病,现已成为世界上最常见的肝脏疾病。虽然NAFLD在最初阶段很少或者几乎没什么症状,但是它很可能发展为脂肪性肝炎(NASH)的炎症状态,而NASH会导致肝硬化和肝癌。脂肪肝可以通过减肥来缓解,但目前并没有已批准的药物治疗方法。因此,更好地理解这种疾病如何发展对于该疾病的预防和治疗至关重要。

一种关键的调节因子

在该研究中,研究人员发现,一种名为GPS2(G蛋白通路抑制因子2)的蛋白质是肝细胞脂质代谢通路的关键调节因子。他们的研究结果表明,这种机制会影响人类和小鼠的脂肪肝产生。为了找出GPS2在肝细胞中的功能和作用靶点,研究人员建立了肝细胞中缺少GPS2且其他细胞类型中也不存在的基因敲除小鼠。然后,他们将小鼠暴露在诱导NASH疾病状态的特殊饮食中,卡罗林斯卡大学医院和卡罗林斯卡学院的临床研究人员和病理学家对它们进行了分析。

令人惊讶的发现

该研究的第一作者、生物科学和营养学系的Ning Liang博士说:“我们惊讶地发现,缺少GPS2的小鼠不会患脂肪肝。”然后,研究团队使用基于序列的技术来阐明GPS2依赖于基因表达的变化。他们发现了之前未知的GPS2在特异性抑制脂肪酸受体PPARα中的作用。GPS2和PPAR的这种合作关系通过对缺少GPS2小鼠的广泛生理学和组织学分析得到了验证。研究团队与来自比利时和法国的临床研究人员合作,分析了被诊断为不同NAFLD阶段患者肝脏活检中的基因表达数据。他们发现,GPS2水平与疾病阶段NASH的特征基因表达显着相关。

可能对治疗具有意义

Rongrong Fan说:“这表明,我们使用小鼠发现的途径也可能与人类有关。这种确认的机制可能有助于解释个体患者发生更严重脂肪肝疾病阶段的不同易感性。”研究人员认为,这条新的肝细胞途径可能对未来的治疗策略具有意义,但他们强调,还需要更进一步了解GPS2在肝脏中其他细胞类型中的功能。Treuter教授说:“我们绝对应该对肝脏免疫细胞中的GPS2通路进行更深入的研究。”

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    2019-10-08 liuli5079
  2. [GetPortalCommentsPageByObjectIdResponse(id=2087537, encodeId=13f6208e53748, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=86, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Tue Oct 08 20:57:00 CST 2019, time=2019-10-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1883675, encodeId=21d418836e503, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Oct 16 14:57:00 CST 2019, time=2019-10-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=364736, encodeId=27d6364e36cf, content=很不错的文章,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/PiajxSqBRaELCAs1uRBgDoWqJaBltta2Y7fTibyM6wYf94osSMg5CCm9oy7JrdcXPqh1DrCdn5IxO4BE8ZLEiaQXQ/0, createdBy=978a1675334, createdName=xiaogan8479, createdTime=Tue Apr 16 09:25:16 CST 2019, time=2019-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=364694, encodeId=37bd364694ae, content=不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=109, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/2EVCwc9WmQS6ec99H2TX8ejmR40xYjwrIcrqjAnibV36aicL1sLxc21rhpZnqTOxk33HP44iayEwo6qYXqgZvdRtA/132, createdBy=d0d01573846, createdName=329523732, createdTime=Mon Apr 15 14:25:08 CST 2019, time=2019-04-15, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=2087537, encodeId=13f6208e53748, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=86, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Tue Oct 08 20:57:00 CST 2019, time=2019-10-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1883675, encodeId=21d418836e503, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=131, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Wed Oct 16 14:57:00 CST 2019, time=2019-10-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=364736, encodeId=27d6364e36cf, content=很不错的文章,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/PiajxSqBRaELCAs1uRBgDoWqJaBltta2Y7fTibyM6wYf94osSMg5CCm9oy7JrdcXPqh1DrCdn5IxO4BE8ZLEiaQXQ/0, createdBy=978a1675334, createdName=xiaogan8479, createdTime=Tue Apr 16 09:25:16 CST 2019, time=2019-04-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=364694, encodeId=37bd364694ae, content=不错, beContent=null, objectType=article, channel=null, level=null, likeNumber=109, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/2EVCwc9WmQS6ec99H2TX8ejmR40xYjwrIcrqjAnibV36aicL1sLxc21rhpZnqTOxk33HP44iayEwo6qYXqgZvdRtA/132, createdBy=d0d01573846, createdName=329523732, createdTime=Mon Apr 15 14:25:08 CST 2019, time=2019-04-15, status=1, ipAttribution=)]
    2019-04-16 xiaogan8479

    很不错的文章,谢谢分享

    0

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    2019-04-15 329523732

    不错

    0

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