作者:Fiona E. A. Mcguigan、Liam Murray、Alison Gallagher、George Davey‐Smith、Charlotte E. Neville、Rob Van't Hof、Colin Boreham、Stuart H. Ralston
DOI:10.1359/jbmr.2002.17.7.1273
日期:2002.7
Peak bone mass is an important risk factor for the development of osteoporosis in later life. Previous work has suggested that genetic, intrauterine, and environmental factors all contribute to the regulation of bone mass, but the ways in which they interact with each other to do so remain poorly understood. In this study, we investigated the relationship between peak bone mass and polymorphisms of the vitamin D receptor (VDR), estrogen receptor (ER) α, and collagen type Iα1 (COLIA1) genes in relation to other factors such as birth weight, lifestyle diet, and exercise in a population‐based cohort of 216 women and 244 men in their early 20s. Stepwise multiple regression analysis showed that body weight was the strongest predictor of bone mineral density (BMD) in women, accounting for 16.4% of the variance in spine BMD and 8.4% of the variance in femoral neck BMD. Other significant predictors were VDR genotype (3.8%) and carbohydrate intake (1.6%) at the spine and vitamin D intake (3.4%) and ER genotype (3.4%) at the femoral neck. Physical activity was the strongest predictor of BMD in men, accounting for 6.7% of the variance at the spine and 5.1% at the hip. Other significant predictors were body weight (5%) and ER PvuII genotype (2.8%) at the spine and weight (3.4%) and alcohol intake (2%) at the femoral neck. Birth weight was not a significant predictor of BMD at either site but COLIA1 genotype significantly predicted birth weight in women, accounting for 4.3% of the variance. We conclude that peak bone mass is regulated by an overlapping but distinct set of environmental and genetic influences that differ in men and women. However, much of the variance in BMD was unexplained by the variables studied here, which suggests that either most of the genes that regulate BMD remain to be discovered or major environmental influences on BMD exist that have not yet been identified.
峰值骨量是晚年发生骨质疏松症的重要危险因素。先前的研究表明,遗传、子宫内和环境因素都有助于骨量的调节,但它们相互作用的方式仍然知之甚少。在这项研究中,我们研究了峰值骨量与维生素 D 受体 (VDR)、雌激素受体 (ER) α 和 I 型胶原蛋白 α1 (COLIA1) 基因多态性之间的关系,以及其他因素(如出生体重、生活方式饮食)的关系。 ,并在一个由 216 名 20 岁出头的女性和 244 名男性组成的人群中进行锻炼。逐步多元回归分析显示,体重是女性骨矿物质密度 (BMD) 的最强预测因子,占脊柱 BMD 方差的 16.4%,占股骨颈 BMD 方差的 8.4%。其他重要的预测因素是脊柱的 VDR 基因型 (3.8%) 和碳水化合物摄入量 (1.6%),以及股骨颈的维生素 D 摄入量 (3.4%) 和 ER 基因型 (3.4%)。体力活动是男性 BMD 的最强预测因素,脊柱方差占 6.7%,髋关节方差占 5.1%。其他重要的预测因素包括脊柱的体重 (5%) 和 ER PvuII 基因型 (2.8%),以及股骨颈的体重 (3.4%) 和酒精摄入量 (2%)。出生体重并不是任一部位 BMD 的显着预测因子,但 COLIA1 基因型显着预测女性的出生体重,占方差的 4.3%。我们得出的结论是,峰值骨量受到一组重叠但截然不同的环境和遗传影响的调节,这些影响在男性和女性中有所不同。然而,这里研究的变量无法解释 BMD 的大部分差异,这表明要么大多数调节 BMD 的基因仍有待发现,要么存在尚未确定的对 BMD 的主要环境影响。