Epigenetic Clock in Bears: A Simple Cost-Effective Blood DNA Methylation-Based Age Estimation Method Applicable to Multiple Bear Species.

Michito Shimozuru, Shiori Nakamura, Jumpei Yamazaki, Yojiro Yanagawa, Hiroo Tamatani, Misako Kuroe, Koji Yamazaki, Shinsuke Koike, Yusuke Goto, Tomoko Naganuma, Kahoko Tochigi, Akino Inagaki, Naoki Takekoshi, Seungyun Baek, Nobutaka Sato, Yusuke Honda, Toshio Tsubota, Hideyuki Ito

Faculty of Veterinary Medicine Hokkaido University Sapporo Hokkaido Japan. · pubmed

Paper

Abstract

Age is an essential factor to understand the life history and demographic parameters of wildlife. Previously, we established an age estimation method for brown bears based on blood DNA methylation level. In this study, we first applied the brown bear-specific age estimation model to other bear species, including Asian black, polar, sun, and Andean bears. Using blood DNA, we performed bisulfite pyrosequencing to determine the methylation levels at four cytosine-phosphate-guanine (CpG) sites adjacent to a single gene,

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Research summary

The paper claims to establish a cost-effective method for estimating the age of multiple bear species using blood DNA methylation levels. This research is relevant as it contributes to understanding the aging process in wildlife, which can provide insights into longevity and age-related biological mechanisms.

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