JCEM:随儿童年龄的增加,Δ5-类固醇硫酸盐如何变化?

2016-09-15 Mechront 译 MedSci原创

背景:随着儿童期网状带(ZR)的扩张,肾上腺脱氢表雄酮硫酸酯(DHEA-S)的生产增加。通过ZR特征细胞的类固醇激素合成表型,可以区分相邻的束状带(ZF),其A型细胞色素b5(CYB5A)和2A1型类固醇硫酸基转移酶(SULT2A1)表达更多,但是2型3β-羟基类固醇脱氢酶(HSD3B2)表达下降。除了DHEA-S,还有三种肾上腺Δ5-类固醇硫酸盐可以作为肾上腺成熟的标志。 目的:同时测定血

背景:随着儿童期网状带(ZR)的扩张,肾上腺脱氢表雄酮硫酸酯(DHEA-S)的生产增加。通过ZR特征细胞的类固醇激素合成表型,可以区分相邻的束状带(ZF),其A型细胞色素b5(CYB5A)和2A1型类固醇硫酸基转移酶(SULT2A1)表达更多,但是2型3β-羟基类固醇脱氢酶(HSD3B2)表达下降。除了DHEA-S,还有三种肾上腺Δ5-类固醇硫酸盐可以作为肾上腺成熟的标志。

目的:同时测定血清四种Δ5-类固醇硫酸盐、孕烯醇酮硫酸盐(Preg-S)、17|ga-羟基孕甾酮硫酸盐(17OHPreg-S)、DHEA-S和5-雄烯二醇-3硫酸盐(Adiol-S)作为年龄的函数,以及这些物质的产出与年龄依赖性肾上腺(定位于CYB5A)之间的关系。

方法:研究纳入了247名正常儿童(129名为男性,118名为女性;年龄1.5-18岁)和42名成人(20名男性,22名女性),使用液相色谱串联质谱法测定血清中Δ5-类固醇硫酸盐水平。对2-35岁拥有正常肾上腺的个体,使用免疫荧光定位HSD3B2和CYB5A。最后,通过慢病毒转导短发卡RNA(shRNA)转导HAC15肾上腺皮质细胞,以抑制CYB5A的表达。

结果:Δ5-类固醇硫酸盐的定量检测中,DHEA-S含量最丰富。Adiol-S与DHEA-S水平平行增加。类固醇比率(17OHPreg-S/DHEA-S)暗示儿童期17,20 -裂解酶活性的增加。免疫荧光分析显示,ZR CYB5A免疫反应随着年龄在增加。此外,肾上腺皮质细胞中HAC15的沉默子CYB5A,可显著减少DHEA-S和Adiol-S的生成。

结论:Adiol-S与DHEA-S的增长模式类型,随年龄而增加;这可能是因为随年龄ZR CYB5A表达增加,加强了17,20 -裂解酶活性,从而产生更多的Adiol-S和DHEA-S。

原始出处:

Juilee Rege,et al.Age-dependent increases in adrenal cytochrome b5 and serum 5-androstenediol-3-sulfate,JCEM.September 13, 2016

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    2016-11-19 smallant2015
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    2016-11-30 achengzhao
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    2016-10-02 忠诚向上

    好好学习

    0

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    2016-09-22 1e10c84am36(暂无匿称)

    文章很好,非常有益

    0

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  6. [GetPortalCommentsPageByObjectIdResponse(id=1777548, encodeId=60441e77548e5, content=<a href='/topic/show?id=eb9610265ed' target=_blank style='color:#2F92EE;'>#JCEM#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10265, encryptionId=eb9610265ed, topicName=JCEM)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2a4439169927, createdName=smallant2015, createdTime=Sat Nov 19 04:42:00 CST 2016, time=2016-11-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2062930, encodeId=31e72062930b8, content=<a href='/topic/show?id=14fb10264d7' target=_blank style='color:#2F92EE;'>#JCE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10264, encryptionId=14fb10264d7, topicName=JCE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e656479, createdName=achengzhao, createdTime=Wed Nov 30 00:42:00 CST 2016, time=2016-11-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=138856, encodeId=0efa1388565d, content=好好学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Sun Oct 02 11:19:15 CST 2016, time=2016-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=132826, encodeId=589f132826f4, content=文章很好,非常有益, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/jW482SpianMayicTRbRZ5RzdAIB7UwTkHt6fQkBP8ictliaXtc5gCUmYdAW1sAETC2nhO3q6YjRHkUibyOCtP8ibmXNObTyd63A076/0, createdBy=d4111948983, createdName=1e10c84am36(暂无匿称), createdTime=Thu Sep 22 09:06:00 CST 2016, time=2016-09-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1313359, encodeId=f5bd1313359d8, content=<a href='/topic/show?id=d59be61251d' target=_blank style='color:#2F92EE;'>#类固醇#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=76125, encryptionId=d59be61251d, topicName=类固醇)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a691420, createdName=30397604, createdTime=Sat Sep 17 08:42:00 CST 2016, time=2016-09-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=128940, encodeId=dc0612894062, content=继续关注!, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160811/IMG57AC91915ACA64463.jpg, createdBy=9c351934462, createdName=知难而进, createdTime=Fri Sep 16 22:29:00 CST 2016, time=2016-09-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=128939, encodeId=064912893950, content=谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160811/IMG57AC91915ACA64463.jpg, createdBy=9c351934462, createdName=知难而进, createdTime=Fri Sep 16 22:28:00 CST 2016, time=2016-09-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=128271, encodeId=ae071282e1df, content=学习学习。。, beContent=null, objectType=article, channel=null, level=null, likeNumber=56, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ceb079804, createdName=lhl629, createdTime=Fri Sep 16 06:00:00 CST 2016, time=2016-09-16, status=1, ipAttribution=)]
    2016-09-16 知难而进

    继续关注!

    0

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    2016-09-16 知难而进

    谢谢分享!

    0

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    2016-09-16 lhl629

    学习学习。。

    0

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