High expression of the breast cancer susceptibility gene BRCA1 in long-lived termite kings.

Abstract:

:Aging is associated with the accumulation of DNA damage. High expression of DNA repair genes has been suggested to contribute to prolonged lifespan in several organisms. However, the crucial DNA repair genes contributing to longevity remain unknown. Termite kings have an extraordinary long lifespan compared with that of non-reproductive individuals such as workers despite being derived from the same genome, thus providing a singular model for identifying longevity-related genes. In this study, we demonstrated that termite kings express higher levels of the breast cancer susceptibility gene BRCA1 than other castes. Using RNA sequencing, we identified 21 king-specific genes among 127 newly annotated DNA repair genes in the termite Reticulitermes speratus. Using quantitative PCR, we revealed that some of the highly expressed king-specific genes were significantly upregulated in reproductive tissue (testis) compared to their expression in somatic tissue (fat body). Notably, BRCA1 gene expression in the fat body was more than 4-fold higher in kings than in workers. These results suggest that BRCA1 partly contributes to DNA repair in somatic and reproductive tissues in termite kings. These findings provide important insights into the linkage between BRCA1 gene expression and the extraordinary lifespan of termite kings.

journal_name

Aging (Albany NY)

journal_title

Aging

authors

Tasaki E,Mitaka Y,Nozaki T,Kobayashi K,Matsuura K,Iuchi Y

doi

10.18632/aging.101578

subject

Has Abstract

pub_date

2018-10-11 00:00:00

pages

2668-2683

issue

10

issn

1945-4589

pii

101578

journal_volume

10

pub_type

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