Nat Commun:HIF-1α和HIF-2α在肾透明细胞癌中发挥相反的调节作用

2020-09-04 QQY MedSci原创

2018年全球范围内新发肾癌病例超过40万例,而肾透明细胞癌(ccRCC)占所有肾癌的70–80%。在大多数ccRCC患者中均发生VHL(逢希伯-林道综合征,von Hippel-Lind

2018年全球范围内新发肾癌病例超过40万例,而肾透明细胞癌(ccRCC)占所有肾癌的70–80%。在大多数ccRCC患者中均发生VHL(逢希伯-林道综合征,von Hippel-Lindau)相关抑癌基因的双等位失活这一遗传事件,说明一种或多种该具有抑癌功能pVHL蛋白亚型的缺失对于肿瘤的早期发生至关重要。

既往研究显示pVHL的特征性抑癌作用主要通过其靶向HIF-1α和HIF-2α并促进二者的氧依赖性泛素介导的蛋白水解来实现。而VHL的突变失活是会导致HIF-1α和HIF-2α这两个转录因子的积累。尽管关于ccRCC的相关研究已显示HIF-1α是侵袭性肿瘤行为的抑制因子而HIF-2α则具有促进作用,但目前尚不清楚二者在肿瘤发生发展中的功能作用。

在该研究中,研究人员采用了一个自体ccRCC模型,在该模型中Hif1a对于肿瘤的形成必不可少,而Hif2a的缺失对肿瘤的发生发展影响较小。研究人员发现HIF-1α和HIF-2α对于透明细胞的表型都是必需的。转录组学和蛋白质组学分析显示,HIF-1α能够调节糖酵解过程,而HIF-2α参与脂蛋白代谢相关基因的调控、核糖体生物发生以及E2F和MYC的转录活性。HIF-2α缺陷型肿瘤呈现出抗原呈递的增加、干扰素信号的激活以及CD8+ T细胞浸润与活化。而HIF1A的单拷贝丢失以及HIF2A mRNA的高表达水平也被证实与人ccRCC中免疫微环境的改变息息相关。

综上研究结果研究揭示了HIF-1α在肾透明细胞癌中的致癌作用,且HIF-1α和HIF-2α二者活性平衡的改变会影响ccRCC的生物学差异和疾病侵袭性。


原始出处:

Hoefflin, R., Harlander, S., Schafer, S. et al. HIF-1α and HIF-2α differently regulate tumour development and inflammation of clear cell renal cell carcinoma in mice. Nat Commun 11, 4111 (17 August 2020).

 

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    2021-07-02 爆笑小医
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    2021-03-20 liuli5079
  5. [GetPortalCommentsPageByObjectIdResponse(id=1979016, encodeId=01c819e901617, content=<a href='/topic/show?id=3b90e79787f' target=_blank style='color:#2F92EE;'>#细胞癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77978, encryptionId=3b90e79787f, topicName=细胞癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e457184, createdName=qingting, createdTime=Mon Dec 14 21:55:30 CST 2020, time=2020-12-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1884622, encodeId=75671884622ca, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=395f25, createdName=爆笑小医, createdTime=Fri Jul 02 13:55:30 CST 2021, time=2021-07-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2010070, encodeId=a9d220100e071, content=<a href='/topic/show?id=6d13948196c' target=_blank style='color:#2F92EE;'>#透明细胞癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94819, encryptionId=6d13948196c, topicName=透明细胞癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a8f1167, createdName=wmr111, createdTime=Fri Jun 04 17:55:30 CST 2021, time=2021-06-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087756, encodeId=f4fd208e7565c, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, 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 20 13:55:30 CST 2021, time=2021-03-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1522158, encodeId=1c1015221587f, content=<a href='/topic/show?id=1b34881e59' target=_blank style='color:#2F92EE;'>#HIF-1α#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8817, encryptionId=1b34881e59, topicName=HIF-1α)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=847f11414102, createdName=changfy, createdTime=Sat Sep 05 14:55:30 CST 2020, time=2020-09-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1556049, encodeId=b51d155604944, content=<a href='/topic/show?id=b3e98813c3' target=_blank style='color:#2F92EE;'>#HIF#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8813, encryptionId=b3e98813c3, topicName=HIF)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=293014689254, createdName=wrj0126, createdTime=Sat Sep 05 14:55:30 CST 2020, time=2020-09-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=882834, encodeId=9db8882834f6, content=学习学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200904/0e28c3efb48e4e09b819b11aafb285fa/714d8655280f42b0b5020b872148186c.jpg, createdBy=e1212204530, createdName=ANNIETIGER, createdTime=Fri Sep 04 23:06:07 CST 2020, time=2020-09-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=882763, encodeId=4981882e6308, content=好, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200903/79d0f015e6084e5ca462828ca002414e/27d5d6b264cb4eeebf7092dc1fb8eae8.jpg, createdBy=22155415237, createdName=ms7000000139248197, createdTime=Fri Sep 04 18:56:46 CST 2020, time=2020-09-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=882741, encodeId=78ff882e41ed, content=,, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20200903/79d0f015e6084e5ca462828ca002414e/27d5d6b264cb4eeebf7092dc1fb8eae8.jpg, createdBy=22155415237, createdName=ms7000000139248197, createdTime=Fri Sep 04 18:50:16 CST 2020, time=2020-09-04, status=1, ipAttribution=)]
    2020-09-05 changfy
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    2020-09-05 wrj0126
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    2020-09-04 ANNIETIGER

    学习学习

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    2020-09-04 ms7000000139248197

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    2020-09-04 ms7000000139248197

    0

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一般来讲,小鼠牙髓感染后会导致慢性不愈合的尖周损伤。令人惊奇的是,作者近日研究发现,Toll-like受体2(TLR2)/IL-10双敲(dKO)小鼠展现出急性但可治愈的骨髓炎样炎症反应。为此,这篇研究的目的是为了检测TLR2/IL-10 dKO小鼠牙髓感染引起的炎症变化以及探索缺氧诱导因子(HIF-1α)亚基和精氨酸酶1介导的尖周损伤愈合的潜在机制。

Cell Biol Int:BMSC-ExosMU通过增强骨形成和血管生成促进缺血性股骨头坏死的修复

间充质干细胞(MSCs)来源的对受损或患病组织具有保护作用。缺氧诱导因子1α(HIF-1α)在骨发育中起关键作用。然而,HIF-1α在含氧量正常的条件下易被生物降解。在HIF-1α编码序列(CDS)中使用携带三重点突变(氨基酸402,564和803)的腺病毒转染骨髓间充质干细胞(BMSCs)。突变HIF-1α可以在含氧量正常的条件下高效表达功能蛋白。迄今为止,还没有研究报道突变型HIF-1α修饰的

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