Growth signaling and longevity in mouse models.

Area of Science:

• Gerontology
• Molecular Biology
• Genetics

Background:

• Insulin/Insulin-like Growth Factor 1 (IIS) signaling pathway reduction is linked to extended lifespan across species.
• Several mouse models with mutations in growth hormone (GH), IGF1, and related receptors/substrates exhibit longevity.
• Deficiency in p70 ribosomal protein S6 kinase 1 (S6K1) and MYC also results in a longevity phenotype.

Purpose of the Study:

• To summarize existing knowledge on long-lived mouse models related to growth signaling.
• To discuss the phenotypic characteristics of these longevity models.
• To analyze organ-specific gene expression patterns associated with extended lifespan.

Main Methods:

• Review of literature on mouse models with genetic alterations in growth signaling pathways.
• Analysis of phenotypic data from longevity mouse models.
• Examination of gene expression profiles in long-lived mice.

Main Results:

• Mutations affecting GH, IGF1, insulin receptor, and S6K1 signaling contribute to lifespan extension.
• MYC deficiency is also associated with a longevity phenotype.
• Gene expression profiling reveals underlying mechanisms of longevity in these models.

Conclusions:

• Targeting IIS and related pathways offers a strategy for lifespan extension.
• Understanding gene expression patterns in longevity models is crucial for elucidating aging mechanisms.
• These mouse models provide valuable insights into the complex regulation of aging and lifespan.