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| 1 | 金川多肋牦牛Hoxa6和Hoxa10基因甲基化与mRNA差异表达研究显示文摘本研究旨在通过检测金川多肋牦牛与普通牦牛中Hoxa6和Hoxa10基因的转录水平和启动子区甲基化状态,为揭示Hox基因在金川多肋牦牛多1对肋骨性状形成中的转录调控机制奠定基础。通过实时荧光定量PCR技术检测Hoxa6和Hoxa10基因在多肋牦牛和普通牦牛中的mRNA表达水平,同时采用重亚硫酸盐测序PCR(Bisulfite-sequencing PCR,BSP)法对Hoxa6和Hoxa10启动子区进行甲基化修饰与克隆测序,分析甲基化状态。结果显示,多肋牦牛中Hoxa6基因表达量显著高于普通牦牛(P<0.05),而Hoxa10基因表达量显著低于普通牦牛(P<0.05)。Hoxa6启动子区域的CpG2,在普通牦牛中的DNA甲基化显著高于多肋牦牛(P<0.05),尤其是第3、4、8、20和21位CpG位点;Hoxa10启动子区域的CpG1在普通牦牛中的DNA甲基化状态显著低于多肋牦牛(P<0.05),普通牦牛的第9和12位CpG位点几乎未甲基化。多肋牦牛中Hoxa10高甲基化在一定程度上抑制了Hoxa10基因的表达,Hoxa6低甲基化水平促进了Hoxa6基因的表达。启动子区域的甲基化在一定程度上影响Hox基因的转录调控,且与多肋性状的形成可能存在一定的联系。 | 熊显荣 张雁 兰道亮 李键 字向东 李善蓉 杨建梅 | 2015 | 畜牧兽医学报2015，46，9： | 4 |
| 2 | Topographic patterns of vascular disease: HOX proteins as determining factors?显示文摘Steadily increasing evidence supports the idea that genetic diversities in the vascular bed are, in addition to hemodynamic influences, a major contributing factor in determining region-specific cardiovascular disease susceptibility. Members of the phylogenetically highly conserved Hox gene family of developmental regulators have to be viewed as prime candidates for determining these regional genetic differences in the vasculature. During embryonic patterning, the regionally distinct and precisely choreographed expression patterns of HOX transcription factors are essential for the correct specification of positional identities. Apparently, these topographic patterns are to some degree retained in certain adult tissues, including the circulatory system. While an understanding of the functional significance of these localized Hox activities in adult blood vessels is only beginning to emerge, an argument can be made for a role of Hox genes in the maintenance of vessel wall homeostasis and functional integrity on the one hand, and in regulating the development and progression of regionally restricted vascular pathologies, on the other. Initial functional studies in animal models, as well as data from clinical studies provide some level of support for this view. The data suggest that putative genetic regulatory networks of Hox-dependent cardiovascular disease processes include genes of diverse functional categories(extracellular matrix remodeling, transmembrane signaling, cell cycle control, inflammatory response, transcriptional control, etc.), as potential targets in both vascular smooth muscle and endothelial cells, as well as cell populations residing in the adventitia. | Richard P Visconti Alexander Awgulewitsch | 2015 | World Journal of Biological Chemistry2015，6，3： | 2 |
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