大型,罕见的染色体缺失与严重的早期肥胖症相关
Elena G Bochukova1, Ni Huang, Julia Keogh
1University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK.
Nature
|December 8, 2009
概括
副本数量的变化,特别是大量的删除,与严重肥胖有显著的联系. 这些遗传变化,特别是染色体16p11.2的变化,与患者的过和胰岛素抵抗有关.
科学领域:
- 遗传学 是一个遗传学.
- 人体生理学 人体生理学
- 医学研究 医学研究
背景情况:
- 肥胖是一种复杂的,高度遗传性疾病,具有显著的遗传异质性.
- 了解严重早期肥胖症的遗传基础对于开发有针对性的干预措施至关重要.
研究的目的:
- 调查拷贝数变异 (CNVs) 对早期严重肥胖症的遗传基础的贡献.
- 为了确定与严重肥胖相关的特定罕见的CNV,特别是在发育迟缓的患者中.
主要方法:
- 对300名患有严重早期肥胖症的白人患者和7,366名对照患者的大 (>500kb),罕见 (<1%) 删除的比较分析.
- 在1062名重度肥胖患者的独立队列中进行反复的CNV识别和验证.
- 对16p11.2染色体缺失和相关基因的遗传分析,包括SH2B1.1.
主要成果:
- 与对照组相比,严重肥胖患者的罕见大缺失显著丰富 (P < 0.001).
- 在患者中发现了染色体16p11.2的反复删除,其中五例患有重叠的删除.
- 删除载体表现出高和严重的胰岛素耐药性,独立于肥胖严重程度,涉及像SH2B1这样的基因在代谢失调.
结论:
- 拷贝数的变化在人类肥胖的遗传结构中起着重要作用.
- 特定的CNV,例如染色体16p11.2上的CNV,与严重肥胖和相关的代谢表型有关.
- 这些发现强调了严重肥胖的遗传因素的重要性,并提出了潜在的治疗目标.
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