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Sex-Specific Gene Expression and Life Span Regulation
1Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA.
Trends in Endocrinology and Metabolism: TEM
|August 7, 2017
Summary
Sex differences influence aging and age-related diseases. Interventions like dietary restriction extend lifespan more in females, potentially due to mitochondrial factors and gene expression.
Area of Science:
- Gerontology
- Sex Differences in Aging
- Molecular Biology
Background:
- Aging-related diseases exhibit significant sex bias, with differing prevalence in men and women.
- Understanding sex-based differences is crucial for developing targeted interventions and comprehending aging mechanisms.
- Model organisms also display sex-specific aging patterns and responses to longevity interventions.
Purpose of the Study:
- To investigate the role of sex in aging processes and age-related diseases.
- To explore how factors like dietary restriction, insulin/IGF1-like signaling, and TOR signaling impact lifespan differently between sexes.
- To examine the contribution of mitochondrial function and gene expression to sex-based aging disparities.
Main Methods:
- Comparative analysis of aging-related disease prevalence between sexes.
- Evaluation of lifespan extension effects of dietary restriction, reduced insulin/IGF1-like signaling, and reduced TOR signaling in male and female model organisms (flies and mice).
- Assessment of mitochondrial function and gene expression patterns in aging males and females.
Main Results:
- Lifespan extension interventions, including dietary restriction, show preferential effects in females across species.
- Females may possess enhanced control over mitochondrial functions, contributing to greater longevity and response to dietary interventions.
- Males exhibit a more pronounced age-related decline in mitochondrial gene expression compared to females.
Conclusions:
- Sex is a critical determinant of aging trajectories and susceptibility to age-related diseases.
- Mitochondrial factors and differential gene expression likely underlie observed sex differences in aging and response to longevity interventions.
- Further research into sex-specific mechanisms can inform the development of personalized aging interventions.
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