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Meta-Analysis
. 2016 Feb 26:6:22243.
doi: 10.1038/srep22243.

The association between telomere length and cancer risk in population studies

Xun Zhu  1 , Wei Han  2 , Wenjie Xue  1 , Yuxia Zou  1 , Cuiwei Xie  1 , Jiangbo Du  1 , Guangfu Jin  1
Affiliations
Meta-Analysis

The association between telomere length and cancer risk in population studies

Xun Zhu et al. Sci Rep. .

Abstract

Telomeres are crucial in the maintenance of chromosome integrity and genomic stability. A series of epidemiological studies have examined the association between telomere length and the risk of cancers, but the findings remain conflicting. We performed literature review and meta-analysis to demonstrate the relationship between telomere length and cancer risk. A total of 23,379 cases and 68,792 controls from 51 publications with 62 population studies were included in this meta-analysis to assess the association between overall cancer or cancer-specific risk and telomere length. General association and dose-response relationship were evaluated based on two and three groups, respectively. The estimates of association were evaluated with odds ratios and 95% confidence intervals by the random-effects or fixed-effects model based on heterogeneity test. We observed a non-significant association between short telomeres and overall risk of cancer. Convincing evidence was observed for the association of short telomeres with an increased risk of gastrointestinal tumor and head and neck cancer. Significant dose-response associations were also observed for gastrointestinal tumor and head and neck cancer. Our findings indicate that telomeres may play diverse roles in different cancers, and short telomeres may be risk factors for the tumors of digestive system.

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Figures

Figure 1
Figure 1. Flow chart for the process of selecting the final 51 publications.
Figure 2
Figure 2
ORs and 95% CIs for cancer risk associated with telomere length (short vs. long).
Figure 3
Figure 3. Funnel plot analysis to detect publication bias.
See this image and copyright information in PMC

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