J Clin Endocrinol Metab:不育男性补充高剂量维生素D能否改善精液质量?

2018-05-25 王淳 环球医学

此前,动物模型和横断面队列研究的结果表明,维生素D对男性生殖具有获益作用。作为进一步研究,2018年3月,发表在《J Clin Endocrinol Metab》的一项由丹麦和美国科学家进行的单中心、三盲、随机临床试验,考察了高剂量维生素D补充能否改善维生素D不足的不育男性的精液质量。

此前,动物模型和横断面队列研究的结果表明,维生素D对男性生殖具有获益作用。作为进一步研究,2018年3月,发表在《J Clin Endocrinol Metab》的一项由丹麦和美国科学家进行的单中心、三盲、随机临床试验,考察了高剂量维生素D补充能否改善维生素D不足的不育男性的精液质量。

目的:旨在确定维生素D和钙补充对不育男性(血清25-羟基维生素D(25OHD)水平≤50nmol/L)精液质量的作用。

设计:单中心、三盲、随机临床试验。

参与者:总共筛查了1427例不育男性,其中1022例不符合入组标准,95例不愿参加,最终纳入330例。

干预:积极治疗组每天接受胆钙化醇30万IU,然后改为每天1400IU胆钙化醇和500mg钙,共150天。其他组接受安慰剂。

结果:与安慰剂组相比,治疗组男性25OHD和1,25-二羟维生素D3的血清浓度显着性高。虽然治疗组的男性与配偶的自然妊娠率趋于较高(7.3% vs 2.4%;Δ5.0%(-0.6%~10.5%)),但维生素D补充与精液参数的改变不相关。与安慰剂相比,少精子症男性亚组使用维生素D治疗可增加活产几率(35.6% vs 18.3%;Δ17.3%(1.6%~32.9%))。此外,血清抑制素B水平在随机分配到高剂量维生素D组的维生素D缺乏男性中较高(193pg/mL vs 143pg/mL;Δ49pg/mL(8~91pg/mL))。然而,精子浓度的增加不比安慰剂组显着性高(P=0.07)。

结论:高剂量维生素D补充不会改善维生素D不足的不育男性的精液质量。维生素D补充对少精子症和维生素D缺乏男性的活产率和血清抑制素B的积极影响可能具有临床重要性,但需要其他试验予以证实。

原始出处:

Blomberg Jensen M, Lawaetz JG, Petersen JH, et al. Effects of Vitamin D Supplementation on Semen Quality, Reproductive Hormones, and Live Birth Rate: A Randomized Clinical Trial. J Clin Endocrinol Metab. 2018 Mar 1;103(3):870-881. doi: 10.1210/jc.2017-01656.

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    2018-11-18 amy0550
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    2019-02-28 一闲
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    2019-05-10 guojianrong
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    2018-05-27 hb2008ye