Metabolic profiling of accelerated aging ERCC1 d/- mice

Area of Science:

• Biogerontology
• Molecular Biology
• Metabolomics

Background:

• Aging is a complex biological process with poorly understood mechanisms.
• DNA repair deficiencies are linked to accelerated aging phenotypes.
• The ERCC1(d/-) mouse model exhibits premature aging due to a modified ERCC1 gene involved in Nucleotide Excision Repair.

Purpose of the Study:

• To investigate the metabolic profiles of ERCC1(d/-) mice compared to wild-type mice.
• To understand the aging mechanisms underlying the premature aging phenotype in ERCC1(d/-) mice.
• To analyze metabolic trajectories and identify age-related metabolic changes.

Main Methods:

• Metabolic profiling of serum and urine samples.
• Utilized (1)H Nuclear Magnetic Resonance ((1)H NMR) spectroscopy.
• Comparative analysis of ERCC1(d/-) mice and wild-type mice across different ages (8-20 weeks).

Main Results:

• Both genotypes exhibited similar age-related metabolic patterns, but differences amplified with age.
• Significant metabolic distinctions between ERCC1(d/-) and wild-type mice were observed.
• Key differences included altered lipid and energy metabolism, a transition to ketosis, and impaired liver and kidney function in ERCC1(d/-) mice.

Conclusions:

• ERCC1 deficiency leads to a premature aging phenotype characterized by distinct metabolic alterations.
• Metabolic profiling reveals significant differences in lipid metabolism, energy production, and organ function associated with accelerated aging.
• The ERCC1(d/-) mouse is a valuable model for studying the interplay between DNA repair and aging processes.