Genetic variation between long-lived versus short-lived bats illuminates the molecular signatures of longevity.

Aging
Zixia HuangEmma C Teeling

Abstract

Bats are the longest-lived mammals given their body size with majority of species exhibiting exceptional longevity. However, there are some short-lived species that do not exhibit extended lifespans. Here we conducted a comparative genomic and transcriptomic study on long-lived Myotis myotis (maximum lifespan = 37.1 years) and short-lived Molossus molossus (maximum lifespan = 5.6 years) to ascertain the genetic difference underlying their divergent longevities. Genome-wide selection tests on 12,467 single-copy genes between M. myotis and M. molossus revealed only three genes (CCDC175, FATE1 and MLKL) that exhibited significant positive selection. Although 97.96% of 12,467 genes underwent purifying selection, we observed a significant heterogeneity in their expression patterns. Using a linear mixed model, we obtained expression of 2,086 genes that may truly represent the genetic difference between M. myotis and M. molossus. Expression analysis indicated that long-lived M. myotis exhibited a transcriptomic profile of enhanced DNA repair and autophagy pathways, compared to M. molossus. Further investigation of the longevity-associated genes suggested that long-lived M. myotis have naturally evolved a diminished anti-longevity tran...Continue Reading

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Citations

Mar 23, 2021·Frontiers in Cell and Developmental Biology·Anita Pras, Ellen A A Nollen

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Methods Mentioned

BETA
RNA-Seq

Software Mentioned

Bat1K
R package cor
_ Calculator
R package DESeq2
KaKs
R package variancePartition
Cutadapt
Metascape
Salmon
GenAge

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