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As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
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Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
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In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded...
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一个双样双向的门德尔随机化分析,测定了端粒长度和甲状腺功能障碍之间的差异.

Shiben Zhu1, Ziyu Hao2, Qihang Chen1

  • 1School of Nursing and Health Studies, Hong Kong Metropolitan University, Hong Kong, Hong Kong SAR, China.

Frontiers in endocrinology
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PubMed
概括
此摘要是机器生成的。

较长的端粒长度 (TL) 与甲状腺功能障碍的风险降低有关. 这项研究使用了门德尔的随机化来调查因果关系,为甲状腺功能障碍的预防和治疗策略提供了洞察力.

关键词:
在GWAS中,GWAS就是GWAS.门德尔的随机化分析.偶然的影响是偶然的影响.甲状腺功能过强症 甲状腺功能过强症端粒的长度 端粒的长度

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科学领域:

  • 遗传学 是一个遗传学.
  • 内分泌学 在内分泌学.
  • 分子生物学分子生物学

背景情况:

  • 甲状腺功能障碍,以低甲状腺激素为特征,具有显著的健康风险,包括心脏问题,骨质疏松症和死亡率增加.
  • 端粒长度 (TL) 和甲状腺功能障碍之间的因果关系尚未明确确确立.

研究的目的:

  • 使用双向门德尔随机化 (MR) 方法调查端粒长度 (TL) 和甲状腺功能障碍之间的潜在因果关系.

主要方法:

  • 采用逆方差加权 (IVW),加权中位数 (WM) 和MR Egger方法进行了两样双向门德尔随机化 (MR) 分析.
  • 从英国生物银行 (n=472,174) 获取了TL的总结统计数据,从GWAS目录 (n=460,499) 和FinnGen (n=173,938) 获取了甲状腺功能障碍的总结统计数据.
  • 139个全基因组显著单核酸多态 (SNP) 被用作TL的仪器变量.

主要成果:

  • 前进的MR分析表明TL对甲状腺功能障碍有显著的逆因果作用;增加的基因预测TL与甲状腺功能障碍风险降低有关 (IVW来自GWAS目录OR:0.659,p<0.001;IVW来自FinnGenOR:0.634,p=0.001).
  • 在不同的MR方法中观察到一致的结果,反向MR分析显示没有证据表明甲状腺功能障碍对TL的因果关系.
  • 敏感性分析证实了研究结果的稳定性,表明最小的偏差.

结论:

  • 较长的端粒长度与患上甲状腺功能增强症的风险降低有关.
  • 这些发现表明了潜在的治疗点,并强调了在甲状腺功能障碍研究中考虑端粒动态的重要性.
  • 需要进一步的研究来验证甲状腺功能障碍对端粒长度的影响.