Proteasome mapping reveals sexual dimorphism in tissue-specific sensitivity to protein aggregations.

TitleProteasome mapping reveals sexual dimorphism in tissue-specific sensitivity to protein aggregations.
Publication TypeJournal Article
Year of Publication2020
AuthorsJenkins ECharles, Shah N, Gomez M, Casalena G, Zhao D, Kenny TC, Guariglia SRose, Manfredi G, Germain D
JournalEMBO Rep
Paginatione48978
Date Published2020 Feb 23
ISSN1469-3178
Abstract

Defects in the proteasome can result in pathological proteinopathies. However, the pathogenic role of sex- and tissue-specific sensitivity to proteotoxic stress remains elusive. Here, we map the proteasome activity across nine tissues, in male and female mice, and demonstrate strong sexual dimorphism in proteasome activity, where females have significantly higher activity in several tissues. Further, we report drastic differences in proteasome activity among tissues, independently of proteasome concentration, which are exacerbated under stress conditions. Sexual dimorphism in proteasome activity is confirmed in a SOD1 ALS mouse model, in which the spinal cord, a tissue with comparatively low proteasome activity, is severely affected. Our results offer mechanistic insight into tissue-specific sensitivities to proteostasis stress and into sex differences in the progression of neurodegenerative proteinopathies.

DOI10.15252/embr.201948978
Alternate JournalEMBO Rep.
PubMed ID32090465
Grant ListR01NS084486 / / HHS | National Institutes of Health (NIH) /
R01NS062055 / / HHS | National Institutes of Health (NIH) /