参与维生素D干预研究的婴儿的骨周转标志物,生长和骨参数
Endocrine connections
|November 18, 2024
概括
在婴儿中,维生素D3补充剂没有影响骨代谢标志物1型原蛋白的氨基终端 (P1NP) 和1型原蛋白的碳氧终端交联 (CTX-I). 这些标记物与生长有关,但与骨矿化无关.
科学领域:
- 儿科 儿科 儿科
- 营养科学 营养科学
- 生物化学 生物化学
背景情况:
- 1型原蛋白的氨基终端 (P1NP) 和1型原蛋白的碳氧终端交联 (CTX-I) 是已确立的骨周转的生物标志物.
- 婴儿骨发育至关重要,维生素D在平衡和骨成熟中起着重要作用.
- 了解维生素D补充对婴儿时期骨代谢标记物的影响,对于优化生长和骨健康至关重要.
研究的目的:
- 研究两种不同的每日维生素D3剂量 (10微克 vs. 30微克) 对12个月大的婴儿的P1NP和CTX-I水平的影响.
- 探索这些骨代谢标志物与人类测量,生长速度和婴儿骨参数之间的关系.
- 评估对维生素D补充剂对骨代谢标志物反应的潜在性别差异.
主要方法:
- 对涉及987名婴儿的随机双盲维生素D干预婴儿 (VIDI) 研究的二次分析.
- 在12个月龄的婴儿子组中测量P1NP和CTX-I度 (P1NP的n=812,CTX-I的n=786).
- 使用外围定量计算断层扫描 (pQCT) 评估人类学和骨参数 (骨矿物质含量,密度,横截面积,极性惯性瞬间);计算从出生到12个月的生长速度.
主要成果:
- 维生素D3补充剂剂量没有显著影响平均CTX-I水平.
- 在维生素D水平较高的群体中,在女孩中观察到较低P1NP水平的趋势,相比于男孩,这表明潜在的剂量依赖作用.
- P1NP与长度和体重的增长率正相关,而CTX-I显示与长度,体重和体重增长率的反向关联;两种标志物都与骨矿化参数无相关.
结论:
- 在测试剂量的维生素D3补充剂并没有改变婴儿的P1NP或CTX-I水平,这表明对整体骨周转指标没有显著影响.
- P1NP和CTX-I与婴儿的生长和体型有关,但与12个月大时的骨矿化没有直接关联.
- 观察到的P1NP对更高维生素D剂量的反应的性别差异需要进一步研究婴儿时期对骨原蛋白矩阵形成的潜在性别特异性影响.
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