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相关概念视频

Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
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Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA
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在多器官成像特征上绘制罕见的蛋白质编码变体的映射.

Yijun Fan1, Jie Chen2, Zirui Fan3

  • 1Graduate Group in Applied Mathematics and Computational Science, University of Pennsylvania, Philadelphia, PA 19104, USA.

medRxiv : the preprint server for health sciences
|November 28, 2024
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这项研究探讨了罕见的遗传变异及其对人体器官结构和功能的影响,使用了超过5万个人的磁共振成像 (MRI) 数据. 研究人员发现了显著的基因特征关联,揭示了对器官间共享的遗传调节的见解.

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科学领域:

  • 遗传学 是一个遗传学.
  • 医疗成像医学成像
  • 人体生理学 人体生理学

背景情况:

  • 人体器官的结构和功能是临床结果的关键指标.
  • 全基因组关联研究 (GWAS) 从磁共振成像 (MRI) 中将常见的遗传变异与大脑和身体表型联系起来.
  • 罕见的蛋白质编码变异对器官大小和功能的影响仍然在很大程度上未被探索.

研究的目的:

  • 在5万多名英国生物库参与者中,对596个多器官MRI特征进行一个外体全组关联研究 (EWAS).
  • 研究罕见遗传变异在人类器官形态和功能中的作用.
  • 识别新的基因特征关联,并了解器官间的共同遗传调节.

主要方法:

  • 在596个多器官MRI特征上进行了对外体范围的关联研究.
  • 分析了英国生物银行中超过5万个人的数据.
  • 利用了变体级别和基于基因的负担关联模型,包括单元负担和AlphaMissense注释.

主要成果:

  • 在各种MRI模式中确定了107个变异级别和224个基因相关性.
  • 发现了重要的关联,包括PTEN与大脑总体积,TTN与心脏功能,TNFRSF13B与脏体积.
  • 使用单元负担和AlphaMissense发现了8个独特的基因特征对,包括具有大脑功能活动的KCNA5.

结论:

  • 罕见的编码变体有助于理解对人类器官形态和功能的遗传影响.
  • 这些发现阐明了不同器官共享的基因调节,并优先考虑潜在的药物点.
  • 这项研究通过器官特异性特征增强了对复杂疾病遗传影响的理解.