Relationship between Serum Fractalkine (CX3CL1) Level and Sarcopenia.

Area of Science:

• Gerontology
• Muscle Physiology
• Biochemistry

Background:

• Aging leads to decreased muscle mass, bone density, and altered body composition.
• Maintaining muscle mass, function, and strength is crucial for independence and work capacity in older adults.
• Sarcopenia, an age-related loss of muscle mass and function, significantly impacts elderly health.

Purpose of the Study:

• To investigate changes in fractalkine levels in individuals with sarcopenia.
• To explore the relationship between sarcopenia and serum fractalkine concentrations.

Main Methods:

• Study conducted from April to October 2024, involving individuals aged 60+.
• Participants were recruited from Geriatrics Polyclinics and categorized into healthy controls, probable sarcopenic, sarcopenic, and severe sarcopenic groups.
• Muscle mass and hand grip strength were assessed, alongside serum fractalkine level measurements.

Main Results:

• Sarcopenic patients showed significantly lower muscle mass and hand grip strength compared to healthy controls.
• Serum fractalkine levels were found to be significantly decreased in sarcopenic individuals.
• A correlation was observed between reduced muscle mass and lower fractalkine levels.

Conclusions:

• Sarcopenia is associated with substantial declines in physical performance and muscle mass.
• Fractalkine, a myokine, is suppressed in individuals with sarcopenia.
• Decreasing muscle mass during aging correlates with reduced serum fractalkine levels, suggesting its potential as a biomarker for sarcopenia.