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Toxicol Sci:砷通过影响miRNA功能抑制细胞分化

2017-11-18 Emma MedSci原创

MicroRNA (miRNA) 是一类由内源基因编码的长度约为22个核苷酸的非编码单链RNA 分子,它们在动植物中参与转录后基因表达调控,调节多种细胞过程(包括胚胎发育和细胞分化)。

研究提示,慢性砷暴露导致发育不良,包括智力功能下降,出生体重下降和运动能力改变,砷抑制细胞分化。MicroRNA (miRNA) 是一类由内源基因编码的长度约为22个核苷酸的非编码单链RNA 分子,它们在动植物中参与转录后基因表达调控,调节多种细胞过程(包括胚胎发育和细胞分化)。因此,研究人员调查了砷是否会影响miRNA功能。

采用多能P19小鼠胚胎癌细胞,在分化过程中暴露于0或0.5μM亚砷酸钠9天,使用微阵列分析miRNA表达变化,miRNA靶标预测程序预测相关靶标基因,并进行细胞转染。

结果显示,在细胞暴露于亚砷酸钠后,细胞分化相关的miR-9和miR-199表达下降,而miR-92a,miR-291a和miR-709的表达分别增加了3倍、3.7倍和1.6倍。MiR-466-669簇的成员及其宿主基因Scm-like与四个Mbt结构域2(Sfmbt2)以时间依赖性方式发生由1.5至4倍的变化,多miRNA靶标预测程序显示几种神经原性转录因子似乎是该簇的靶标基因。当抑制miR-466-669簇时,NeuroD1表达增加,挽救砷对细胞分化的抑制作用。该研究表明,砷能够诱导miR-466-669簇抑制细胞分化, NeuroD1受到抑制可能是其中的一个作用机制。

原始出处:
Toxicol Sci, et al. Arsenic induces members of the mmu-miR-466-669 cluster which reduces NeuroD1 expression. Toxicol Sci. 2017 Nov 7. doi: 10.1093/toxsci/kfx241.

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    2018-10-25 smallant2002
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    2018-05-03 121df2e2m78暂无昵称

    好资料.学习了

    0

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    2017-11-20 Homburg
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  5. [GetPortalCommentsPageByObjectIdResponse(id=1930547, encodeId=5f63193054e27, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Thu Oct 25 23:30:00 CST 2018, time=2018-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=311698, encodeId=fe3731169847, content=好资料.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=d9a52288519, createdName=121df2e2m78暂无昵称, createdTime=Thu May 03 20:56:16 CST 2018, time=2018-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312324, encodeId=1b121312324d4, content=<a href='/topic/show?id=e5571193321' target=_blank style='color:#2F92EE;'>#miRNA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11933, encryptionId=e5571193321, topicName=miRNA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87d405, createdName=Homburg, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1570191, encodeId=8fdd15e01916a, content=<a href='/topic/show?id=a66ae7809b1' target=_blank style='color:#2F92EE;'>#细胞分化#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77809, encryptionId=a66ae7809b1, topicName=细胞分化)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=653c15636865, createdName=karmond, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1595975, encodeId=9d6b15959e50e, content=<a href='/topic/show?id=07bfe3495f1' target=_blank style='color:#2F92EE;'>#砷#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73495, encryptionId=07bfe3495f1, topicName=砷)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=863418313756, createdName=lishizhe, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262363, encodeId=8e2d2623635b, content=厉害, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/10/23/34a9d65916d827fdc29634f0dd8d8de1.jpg, createdBy=1c2b2160344, createdName=Drlee9214, createdTime=Sat Nov 18 23:06:20 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262349, encodeId=c40c26234989, content=好资料学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=92191944782, createdName=thlabcde, createdTime=Sat Nov 18 20:08:06 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262328, encodeId=941b2623282e, content=学习了.涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, 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=Sat Nov 18 19:31:43 CST 2017, time=2017-11-18, status=1, ipAttribution=)]
    2017-11-20 lishizhe
  6. [GetPortalCommentsPageByObjectIdResponse(id=1930547, encodeId=5f63193054e27, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Thu Oct 25 23:30:00 CST 2018, time=2018-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=311698, encodeId=fe3731169847, content=好资料.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=d9a52288519, createdName=121df2e2m78暂无昵称, createdTime=Thu May 03 20:56:16 CST 2018, time=2018-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312324, encodeId=1b121312324d4, content=<a href='/topic/show?id=e5571193321' target=_blank style='color:#2F92EE;'>#miRNA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11933, encryptionId=e5571193321, topicName=miRNA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87d405, createdName=Homburg, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1570191, encodeId=8fdd15e01916a, content=<a href='/topic/show?id=a66ae7809b1' target=_blank style='color:#2F92EE;'>#细胞分化#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77809, encryptionId=a66ae7809b1, topicName=细胞分化)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=653c15636865, createdName=karmond, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1595975, encodeId=9d6b15959e50e, content=<a href='/topic/show?id=07bfe3495f1' target=_blank style='color:#2F92EE;'>#砷#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73495, encryptionId=07bfe3495f1, topicName=砷)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=863418313756, createdName=lishizhe, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262363, encodeId=8e2d2623635b, content=厉害, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/10/23/34a9d65916d827fdc29634f0dd8d8de1.jpg, createdBy=1c2b2160344, createdName=Drlee9214, createdTime=Sat Nov 18 23:06:20 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262349, encodeId=c40c26234989, content=好资料学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=92191944782, createdName=thlabcde, createdTime=Sat Nov 18 20:08:06 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262328, encodeId=941b2623282e, content=学习了.涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, 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=Sat Nov 18 19:31:43 CST 2017, time=2017-11-18, status=1, ipAttribution=)]
    2017-11-18 Drlee9214

    厉害

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=1930547, encodeId=5f63193054e27, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Thu Oct 25 23:30:00 CST 2018, time=2018-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=311698, encodeId=fe3731169847, content=好资料.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=d9a52288519, createdName=121df2e2m78暂无昵称, createdTime=Thu May 03 20:56:16 CST 2018, time=2018-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312324, encodeId=1b121312324d4, content=<a href='/topic/show?id=e5571193321' target=_blank style='color:#2F92EE;'>#miRNA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11933, encryptionId=e5571193321, topicName=miRNA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87d405, createdName=Homburg, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1570191, encodeId=8fdd15e01916a, content=<a href='/topic/show?id=a66ae7809b1' target=_blank style='color:#2F92EE;'>#细胞分化#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77809, encryptionId=a66ae7809b1, topicName=细胞分化)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=653c15636865, createdName=karmond, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1595975, encodeId=9d6b15959e50e, content=<a href='/topic/show?id=07bfe3495f1' target=_blank style='color:#2F92EE;'>#砷#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73495, encryptionId=07bfe3495f1, topicName=砷)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=863418313756, createdName=lishizhe, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262363, encodeId=8e2d2623635b, content=厉害, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/10/23/34a9d65916d827fdc29634f0dd8d8de1.jpg, createdBy=1c2b2160344, createdName=Drlee9214, createdTime=Sat Nov 18 23:06:20 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262349, encodeId=c40c26234989, content=好资料学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=92191944782, createdName=thlabcde, createdTime=Sat Nov 18 20:08:06 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262328, encodeId=941b2623282e, content=学习了.涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, 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=Sat Nov 18 19:31:43 CST 2017, time=2017-11-18, status=1, ipAttribution=)]
    2017-11-18 thlabcde

    好资料学习了!

    0

  8. [GetPortalCommentsPageByObjectIdResponse(id=1930547, encodeId=5f63193054e27, content=<a href='/topic/show?id=22f61180211' target=_blank style='color:#2F92EE;'>#miR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11802, encryptionId=22f61180211, topicName=miR)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a27288, createdName=smallant2002, createdTime=Thu Oct 25 23:30:00 CST 2018, time=2018-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=311698, encodeId=fe3731169847, content=好资料.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=d9a52288519, createdName=121df2e2m78暂无昵称, createdTime=Thu May 03 20:56:16 CST 2018, time=2018-05-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1312324, encodeId=1b121312324d4, content=<a href='/topic/show?id=e5571193321' target=_blank style='color:#2F92EE;'>#miRNA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11933, encryptionId=e5571193321, topicName=miRNA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87d405, createdName=Homburg, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1570191, encodeId=8fdd15e01916a, content=<a href='/topic/show?id=a66ae7809b1' target=_blank style='color:#2F92EE;'>#细胞分化#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77809, encryptionId=a66ae7809b1, topicName=细胞分化)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=653c15636865, createdName=karmond, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1595975, encodeId=9d6b15959e50e, content=<a href='/topic/show?id=07bfe3495f1' target=_blank style='color:#2F92EE;'>#砷#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73495, encryptionId=07bfe3495f1, topicName=砷)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=863418313756, createdName=lishizhe, createdTime=Mon Nov 20 09:30:00 CST 2017, time=2017-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262363, encodeId=8e2d2623635b, content=厉害, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://cdnapi.center.medsci.cn/medsci/head/2017/10/23/34a9d65916d827fdc29634f0dd8d8de1.jpg, createdBy=1c2b2160344, createdName=Drlee9214, createdTime=Sat Nov 18 23:06:20 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262349, encodeId=c40c26234989, content=好资料学习了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=89, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=92191944782, createdName=thlabcde, createdTime=Sat Nov 18 20:08:06 CST 2017, time=2017-11-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=262328, encodeId=941b2623282e, content=学习了.涨知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, 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=Sat Nov 18 19:31:43 CST 2017, time=2017-11-18, status=1, ipAttribution=)]
    2017-11-18 1ddf0692m34(暂无匿称)

    学习了.涨知识

    0

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直接暴露于环境的氧化剂和毒物的人体肺组织容易受到伤害,导致急性或慢性氧化损伤。Nrf2(核因子红细胞2相关因子2)代表中枢细胞防御机制,并且是用于开发抗氧化损伤诱导的人类肺部疾病的药物靶标。

Sci Rep:口腔接触砷可以引起听力障碍!

到目前为止,在人类或者小鼠中还没有关于口腔接触砷(As)与听力障碍相关关系的研究信息。最近,有研究人员结合流行病学研究和实验研究,调查了在年龄为12到29岁的人和年轻小鼠中,口腔接触砷与听力障碍的关系。研究发现,在接触组(n=48)中,与对照组(n=29)的相比,受试者喝下含有砷的管井水,在4kHz(odds ratio (OR)=7.60; 95% confidence interval (CI

Diabetes Care:砷和糖尿病有啥关系?

青年中,砷和糖尿病的关联是鲜为人知的。我们研究了砷与1型和2型糖尿病的关联。因为一碳代谢影响砷代谢,我们也评估了叶酸和维生素B12,与砷代谢对糖尿病患病率的潜在的相互作用。 研究纳入688例患者,年龄<22岁,1型和2型糖尿病分别有429例和85例,还有174例对照参与者。测量血浆砷(无机砷[iAs]、单甲基化砷[MMA]、二甲基化砷[DMA])和一碳代谢标志物(叶酸和维生素B12)。

极草被勒令停产,或将永久告别保健品行列

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砷的长期慢性暴露与心血管疾病(CVD)的发病率和死亡率增加有关;然而,与砷暴露相关CVD的早期预测生物标志物以及潜在的机制尚未明确。内皮的功能障碍在CVD的发展中起着核心作用。近期,一项发表在杂志PLos One上的研究推测内皮损伤或功能障碍是这一病理过程的重要的方面,其可能是发生砷相关CVD的早期事件。血清中可溶性血栓调节素(sTM)被认为是内皮损伤或功能障碍的特异且稳定的标志物。基于此,此研究

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