Proteomics Uncover Sexual Dimorphism and Immune Changes in Aging Werner Syndrome Mice


“Proteomics analysis at different ages allows us to follow the progressive biological alterations (including histological fat accumulation) in the liver according to age and/or the Wrn genotype.”

Listen to an audio version of this press release

BUFFALO, NY- June 3, 2024 – A new research paper was published on the cover of Aging (listed by MEDLINE/PubMed as "Aging (Albany NY)" and "Aging-US" by Web of Science) Volume 16, Issue 10, entitled, “Integrated liver and serum proteomics uncover sexual dimorphism and alteration of several immune response proteins in an aging Werner syndrome mouse model.”

Werner syndrome (WS) is a progeroid disorder caused by mutations in a protein containing both a DNA exonuclease and DNA helicase domains. Previous studies indicated that males lacking the helicase domain of the Wrn protein orthologue exhibited hepatic transcriptomic and metabolic alterations. 

In this new study, researchers Lucie Aumailley, Marie Julie Dubois, André Marette, and Michel Lebel from Université Laval used a label-free liquid chromatography-tandem mass spectrometry approach to uncover proteins abundance associated with specific biological processes that differed depending on the age (four or ten months) and/or the genotype (wild type or Wrn mutant) in the serum and liver of mice. Principal component analysis of the proteomic data from both serum and hepatic tissue revealed a sexual dimorphism regardless of the age and the genotype of the mice. 

“Moreover, although all Wrn mutant mice exhibited fatty liver by the age of ten months, a significant age and genotype dependent enrichment of proteins involved in lipid and fatty acid metabolic processes were uncovered only in males.”

Also, a genotype dependent increase in serum oxidant detoxification processes was observed in the serum of Wrn mutant males. Despite these sexual differences, several aspects of the immune system were affected in both females and males. Finally, an increase of specific immunoglobulin molecules was common in the liver and serum of both older Wrn mutant females and males. 

“Such results suggest that specific immunoglobulin variants may be associated with fatty liver progression in WS.”

Read the full study: DOI: 

Corresponding Author: Michel Lebel - 

Keywords: proteomics, Werner syndrome, fatty liver, sexual dimorphism, immunoglobulins

Click here to sign up for free Altmetric alerts about this article.

About Aging-US:

Cancer and aging are two sides of age-related tumorigenesis.

The mission of the journal is to understand the mechanisms surrounding aging and age-related diseases, including cancer as the main cause of death in the modern aged population.

The journal aims to promote 1) treatment of age-related diseases by slowing down aging, 2) validation of anti-aging drugs by treating age-related diseases, and 3) prevention of cancer by inhibiting aging. (Cancer and COVID-19 are age-related diseases.)

Please visit our website at and connect with us:

For media inquiries, please contact