Institute of Mental Health, National Healthcare Group, Singapore; Clinical Imaging Research Centre, National University of Singapore, Singapore; Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A(∗)STAR), Singapore.
DeepMind Technologies Limited, United Kingdom, UK.
Neuroimage. 2020 Nov 1;221:117087. doi: 10.1016/j.neuroimage.2020.117087. Epub 2020 Jun 25.
The androgen receptor (AR), oestrogen receptor alpha (ESR1) and oestrogen receptor beta (ESR2) play essential roles in mediating the effect of sex hormones on sex differences in the brain. Using Voxel-based morphometry (VBM) and gene sizing in two independent samples (discovery n = 173, replication = 61), we determine the common and unique influences on brain sex differences in grey (GM) and white matter (WM) volume between repeat lengths (n) of microsatellite polymorphisms AR(CAG)n, ESR1(TA)n and ESR2(CA)n. In the hypothalamus, temporal lobes, anterior cingulate cortex, posterior insula and prefrontal cortex, we find increased GM volume with increasing AR(CAG)n across sexes, decreasing ESR1(TA)n across sexes and decreasing ESR2(CA)n in females. Uniquely, AR(CAG)n was positively associated with dorsolateral prefrontal and orbitofrontal GM volume and the anterior corona radiata, left superior fronto-occipital fasciculus, thalamus and internal capsule WM volume. ESR1(TA)n was negatively associated with the left superior corona radiata, left cingulum and left inferior longitudinal fasciculus WM volume uniquely. ESR2(CA)n was negatively associated with right fusiform and posterior cingulate cortex uniquely. We thus describe the neuroanatomical correlates of three microsatellite polymorphisms of steroid hormone receptors and their relationship to sex differences.
雄激素受体 (AR)、雌激素受体 alpha (ESR1) 和雌激素受体 beta (ESR2) 在介导性激素对大脑性别差异的影响方面发挥着重要作用。使用体素基形态计量学 (VBM) 和基因大小分析在两个独立样本(发现样本 n=173,复制样本 n=61)中,我们确定了 AR(CAG)n、ESR1(TA)n 和 ESR2(CA)n 微卫星多态性重复长度 (n) 对灰质 (GM) 和白质 (WM) 体积脑性别差异的共同和独特影响。在下丘脑、颞叶、前扣带皮层、后岛叶和前额叶皮层中,我们发现 AR(CAG)n 增加与 GM 体积增加有关,跨性别 ESR1(TA)n 减少,女性 ESR2(CA)n 减少。独特的是,AR(CAG)n 与背外侧前额叶和眶额 GM 体积以及前放射冠、左侧额顶额束、丘脑和内囊 WM 体积呈正相关。ESR1(TA)n 与左侧放射冠、左侧扣带束和左侧下纵束 WM 体积的负相关是独特的。ESR2(CA)n 与右侧梭状回和后扣带皮层的负相关是独特的。因此,我们描述了三种类固醇激素受体微卫星多态性的神经解剖学相关性及其与性别差异的关系。