[Stimulation of proliferation by carnosine: cellular and transcriptome approaches]

Area of Science:

• Biochemistry
• Cell Biology
• Gerontology

Context:

• Endogenous dipeptide carnosine is found in high concentrations in human muscle tissue.
• Carnosine research spans over a century, with anti-aging effects being a key focus.
• Previous studies highlighted carnosine's role in increasing the Hayflick limit and promoting morphological rejuvenation in cell cultures.

Purpose:

• To investigate the effects of carnosine on cell division and the cell cycle.
• To analyze carnosine-induced changes in cellular processes using transcriptomic analysis.
• To understand the potential role of carnosine in cellular rejuvenation and muscle regeneration.

Summary:

• Carnosine stimulates cell division in various assays, including colony-forming assays and the transition to a quiescent state.
• Transcriptomic analysis reveals that carnosine primarily enhances positive regulation of the cell cycle, from DNA synthesis initiation to chromosome condensation.
• These findings suggest carnosine-induced cell cycle stimulation contributes to rejuvenation processes.

Impact:

• The study provides insights into the molecular mechanisms underlying carnosine's anti-aging and regenerative properties.
• Understanding carnosine's role in cell cycle regulation could lead to novel therapeutic strategies for age-related conditions and muscle recovery.
• The high concentration of carnosine in muscle tissue is hypothesized to be crucial for efficient muscle regeneration after physical exertion.