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基因组G-四链体在转录调控中的作用机制研究进展
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作者 贺珍珍 陈晓峰 +3 位作者 侯越 杨铁林 杨波 郭燕 《遗传》 北大核心 2025年第12期1287-1299,共13页
G-四链体(G-quadruplex,G4)作为基因组中典型的非B型核酸二级结构,通过其独特的四链折叠构象广泛参与端粒稳态维持、DNA复制调控、基因转录及翻译调控等关键生物学过程。在哺乳动物基因组中,G4在功能调控区域的显著富集特征揭示了其在... G-四链体(G-quadruplex,G4)作为基因组中典型的非B型核酸二级结构,通过其独特的四链折叠构象广泛参与端粒稳态维持、DNA复制调控、基因转录及翻译调控等关键生物学过程。在哺乳动物基因组中,G4在功能调控区域的显著富集特征揭示了其在转录调控中具有关键作用。本文聚焦基因组内源G4的动态形成机制与转录调控功能,系统阐述了其通过三重分子路径调控基因表达:(1)介导转录激活复合物的空间组装;(2)动态调控组蛋白修饰和DNA甲基化等表观遗传事件;(3)重构三维染色质构象以建立转录活性微环境。通过整合G4拓扑表征技术及动态平衡网络的最新进展,本文明确了G4作为关键顺式调控元件的功能定位,并为靶向G4的治疗策略开发指明了方向。 展开更多
关键词 G-四链体(G4) 转录 表观遗传 三维染色质
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Hi-C技术在三维基因组学和疾病致病机理研究中的应用 被引量:2
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作者 王舜泽 江丰 +2 位作者 朱东丽 杨铁林 郭燕 《遗传》 CAS CSCD 北大核心 2023年第4期279-294,共16页
三维基因组学在基因组序列、基因结构及其调控元件的基础上对细胞核内的染色质的三维空间结构进行研究。染色体的空间交互作用是基因表达调控的重要因素,随着高通量染色体构象捕获(high-throughput chromosome conformation capture,Hi... 三维基因组学在基因组序列、基因结构及其调控元件的基础上对细胞核内的染色质的三维空间结构进行研究。染色体的空间交互作用是基因表达调控的重要因素,随着高通量染色体构象捕获(high-throughput chromosome conformation capture,Hi-C)技术及其衍生技术的出现和快速发展,借助Hi-C技术获取高通量三维基因组学数据,对基因表达调控等生物过程进行研究,已成为揭示细胞深层机制、阐明疾病致病机理的重要手段。本文在介绍三维基因组的发展历程和研究技术的基础上,重点总结了近年来Hi-C技术在多种疾病研究、特别是致病机理阐释方面的应用和成果,为深入理解三维基因组学在构建全局基因调控图谱、挖掘疾病致病机理方面的应用提供参考和借鉴。 展开更多
关键词 Hi-C 三维基因组学 染色质结构 基因表达调控
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Unveiling Promising Neuroimaging Biomarkers for Schizophrenia Through Clinical and Genetic Perspectives
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作者 Jing Guo Changyi He +4 位作者 Huimiao Song Huiwu Gao Shi Yao Shan-Shan Dong tie-lin yang 《Neuroscience Bulletin》 SCIE CAS CSCD 2024年第9期1333-1352,共20页
Schizophrenia is a complex and serious brain disorder.Neuroscientists have become increasingly interested in using magnetic resonance-based brain imaging-derived phenotypes(IDPs)to investigate the etiology of psychiat... Schizophrenia is a complex and serious brain disorder.Neuroscientists have become increasingly interested in using magnetic resonance-based brain imaging-derived phenotypes(IDPs)to investigate the etiology of psychiatric disorders.IDPs capture valuable clinical advantages and hold biological significance in identifying brain abnormalities.In this review,we aim to discuss current and prospective approaches to identify potential biomarkers for schizophrenia using clinical multimodal neuroimaging and imaging genetics.We first described IDPs through their phenotypic classification and neuroimaging genomics.Secondly,we discussed the applications of multimodal neuroimaging by clinical evidence in observational studies and randomized controlled trials.Thirdly,considering the genetic evidence of IDPs,we discussed how can utilize neuroimaging data as an intermediate phenotype to make association inferences by polygenic risk scores and Mendelian randomization.Finally,we discussed machine learning as an optimum approach for validating biomarkers.Together,future research efforts focused on neuroimaging biomarkers aim to enhance our understanding of schizophrenia. 展开更多
关键词 SCHIZOPHRENIA Biomarkers Brain imaging-derived phenotypes Multimodal neuroimaging Imaging genomics
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Isolation and culture of human primary osteoblasts:Comparing the effects of differences in method details on osteoblast characteristics
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作者 Fei Chen Yan Zhang +6 位作者 Pai Peng Xiao-Ting Huang Zi-Han Qiu Bao-Cheng Liu tie-lin yang Bo yang Yan Guo 《Genes & Diseases》 SCIE CSCD 2024年第2期546-549,共4页
Osteoblasts are essential in the maintenance of human bone homeostasis.1 The abnormal formation and impaired differentiation ability of osteoblasts are pivotal factors leading to bone-related diseases,suggesting that ... Osteoblasts are essential in the maintenance of human bone homeostasis.1 The abnormal formation and impaired differentiation ability of osteoblasts are pivotal factors leading to bone-related diseases,suggesting that an indepth study of osteoblasts can provide novel treatment strategies for these diseases.2 Human primary osteoblasts are precious experimental models in bone-related research.3 However,the isolation and culture of human primary osteoblasts still have some difficulties and limitations.Here,we refined a method to isolate and culture human primary osteoblasts by taking cancellous bone through a bone tissue sampler and pre-digesting it with pancreatin,which makes the process easier,cheaper,and more efficient.Furthermore,we compared the effects of the subtle changes in isolation and culture methods on the phenotype of human primary osteoblasts and examined the differences in morphology,proliferation,and differentiation between micro-explants cultured osteoblasts(MECOBs)and explants cultured osteoblasts(EC-OBs). 展开更多
关键词 IMPAIRED CULTURE DETAILS
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