ASBMR 2015:孕期补VD仅对冬季出生的宝宝有益,且大剂量补充对孕妇有害

2015-10-24 seven L 译 MedSci原创

MAVIDOS早期结果表明:孕期补充VD可以阻止女性骨量下降(12月-2月),并且增加宝宝的骨量。相反,另一项大型研究却指出孕期补充VD并不会改善母儿的骨健康,并且高剂量的VD供应还会削弱孕妇的股骨。MAVIDOS:超过1000名女性在孕12周随机分为VD3组(1000-IU (25-µg)/d)和安慰剂组。该研究指出“季节”对研究结果影响非常大。日光足的季节出生的宝宝,出生后2周通过DEXA评估

MAVIDOS早期结果表明:孕期补充VD可以阻止女性骨量下降(12月-2月),并且增加宝宝的骨量。相反,另一项大型研究却指出孕期补充VD并不会改善母儿的骨健康,并且高剂量的VD供应还会削弱孕妇的股骨。

MAVIDOS:超过1000名女性在孕12周随机分为VD3组(1000-IU (25-µg)/d)和安慰剂组。该研究指出“季节”对研究结果影响非常大。日光足的季节出生的宝宝,出生后2周通过DEXA评估骨密度,实验组和对照组并没有太大区别。

在另一个试验中,193名孕妇备孕期摄入低剂量VD,孕期随机分为70 µg (2800 IU)/d 或35 µg (1400 IU)/d以及安慰剂组。研究结果指出高剂量VD摄入比安慰剂组,其股骨颈骨密度下降。该研究对孕期摄入大剂量VD是一个警示。

有一些研究指出,孕妇25(OH)D水平和后代骨骼发育有关。

一项纳入1149名孕12周女性的研究,参与者25 OH(D) 浓度在25-100 nmol/L间,将其随机分为1000-IU/d VD3组和安慰剂组。在孕34周,实验组和对照组VD≥ 50 nmol/L的人群分别为83% 和37% (P =0.004)。实验组和对照组中分别有328和327名新生儿进行了DEXA 扫描,骨矿物质含量在两组间差异不大(61.6 g vs 60.5 g, P =0.21)。不过在对季节进行分层后发现,冬季出生的宝宝,实验组比对照组骨矿物质含量更多 (63.0 g vs 57.5 g; P = .004)。

先前的Danish研究指出,1/3的孕期和产后女性VD不足 (< 50 nmol/L),高达90%的育龄期女性VD缺乏。并且指出母乳喂养1年后女性腰椎、全髋、前臂、以及全身骨质疏松。

现有一项研究旨在探究孕期骨质疏松能否被缓解。

该研究将193名备孕的VD不足(< 50 nmol/L) 女性随机分为高剂量或低剂量VD组以及安慰剂组,最终90名参与者分娩了宝宝。高剂量、低剂量、安慰剂组女性在分娩时VD浓度分为别118 nmol/L、 98 nmol/L、60 nmol/L。高剂量组与安慰剂组比较发现,女性股骨颈密度下降了4.8%(P = .03),相反,前臂中远端骨密度反而增加了0.6%(P = .03)。对于宝宝的相关检测指标,各组间并没有发现什么差异。

后期研究者打算随访该队列,探究孕期VD的补充与慢性疾病如哮喘、肥胖等的研究。

原始出处:

Medscape:Vitamin D in Pregnancy: Winter Babies Benefit, High Doses Harm


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    2015-10-29 Bobby7868

    很有用

    0

  2. [GetPortalCommentsPageByObjectIdResponse(id=41861, encodeId=da2941861af, content=很有用, beContent=null, objectType=article, channel=null, level=null, likeNumber=123, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=75bb1617091, createdName=Bobby7868, createdTime=Thu Oct 29 11:37:00 CST 2015, time=2015-10-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=41821, encodeId=d2cd4182151, content=孕期补充维生素是否合适有待研究, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=05151605011, createdName=linglong1990, createdTime=Wed Oct 28 21:46:00 CST 2015, time=2015-10-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=41327, encodeId=20854132ef9, content=看来骨质疏松大有学问, beContent=null, objectType=article, channel=null, level=null, likeNumber=105, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20150625/IMG558B8C995D7262168.jpg, createdBy=36ad1623080, createdName=cyzj007, createdTime=Mon Oct 26 12:18:00 CST 2015, time=2015-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1578658, encodeId=735315e8658d4, content=<a href='/topic/show?id=fbf0436148a' target=_blank style='color:#2F92EE;'>#大剂量#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=43614, encryptionId=fbf0436148a, topicName=大剂量)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cd6a16418535, createdName=ms7899726347904398, createdTime=Mon Oct 26 04:49:00 CST 2015, time=2015-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1585367, encodeId=ccdf158536ef8, content=<a href='/topic/show?id=c9aa281642' target=_blank style='color:#2F92EE;'>#ASBMR#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2816, encryptionId=c9aa281642, topicName=ASBMR)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=80af17169636, createdName=clmlylxy, createdTime=Mon Oct 26 04:49:00 CST 2015, time=2015-10-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1249674, encodeId=a2de12496e466, content=<a href='/topic/show?id=95264599452' target=_blank style='color:#2F92EE;'>#宝宝#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=45994, encryptionId=95264599452, topicName=宝宝)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=杏林小小, createdTime=Sat Oct 24 16:49:00 CST 2015, time=2015-10-24, status=1, ipAttribution=)]
    2015-10-28 linglong1990

    孕期补充维生素是否合适有待研究

    0

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    2015-10-26 cyzj007

    看来骨质疏松大有学问

    0

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    2015-10-26 clmlylxy
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