The relationship between telomere length and mortality risk in non-model vertebrate systems: a meta-analysis.

The relationship between telomere length and mortality risk in non-model vertebrate systems: a meta-analysis.
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非模型脊椎动物系统中端粒长度和死亡率风险之间的关系:荟萃分析。

DOI:
10.1098/rstb.2016.0447
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发表时间:
2018-03-05
期刊:
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子:
--
通讯作者:
Boonekamp JJ
Boonekamp JJ
中科院分区:
其他
文献类型:
--
作者:
Wilbourn RV;Moatt JP;Froy H;Walling CA;Nussey DH;Boonekamp JJ

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端粒长度(TL)已成为生态学和进化生物学中越来越受关注的生物标志物,在最近的一些鸟类研究中发现,端粒长度可以预测随后的生存。在这里,我们进行了第一次正式的荟萃分析,以测试除人类和模型实验室啮齿动物之外的脊椎动物中TL与随后的死亡风险之间是否存在总体关联。我们确定了27项合适的研究,并从每个研究中获得了与TL相关的风险比的标准化估计。我们对这些估计进行了荟萃分析,发现总体上显着的负相关,这意味着短端粒与死亡风险增加有关,这对明显的发表偏倚是强有力的。虽然我们发现风险比的异质性不能用研究动物的性别、随访期、最长寿命或年龄组来解释,但在使用qPCR的研究中,与末端限制性片段方法相比,tl -死亡率风险相关性更强。我们的研究结果为短端粒与鸟类死亡风险增加之间的一致关联提供了支持,但也强调了对非鸟类脊椎动物进行更多研究的必要性,以及不同端粒测量方法可能产生不同结果的原因。本文是“理解端粒动力学多样性”主题问题的一部分。
Telomere length (TL) has become a biomarker of increasing interest within ecology and evolutionary biology, and has been found to predict subsequent survival in some recent avian studies but not others. Here, we undertake the first formal meta-analysis to test whether there is an overall association between TL and subsequent mortality risk in vertebrates other than humans and model laboratory rodents. We identified 27 suitable studies and obtained standardized estimates of the hazard ratio associated with TL from each. We performed a meta-analysis on these estimates and found an overall significant negative association implying that short telomeres are associated with increased mortality risk, which was robust to evident publication bias. While we found that heterogeneity in the hazard ratios was not explained by sex, follow-up period, maximum lifespan or the age group of the study animals, the TL–mortality risk association was stronger in studies using qPCR compared to terminal restriction fragment methodologies. Our results provide support for a consistent association between short telomeres and increased mortality risk in birds, but also highlight the need for more research into non-avian vertebrates and the reasons why different telomere measurement methods may yield different results. This article is part of the theme issue ‘Understanding diversity in telomere dynamics’.
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