Muscle wasting in ageing and chronic illness

Area of Science:

• Gerontology
• Muscle Physiology
• Public Health

Background:

• Increasing life expectancy highlights muscle wasting as a significant public health issue.
• Muscle loss affects aging individuals (sarcopenia) and those with chronic diseases like heart failure (cachexia).
• Understanding the pathophysiological mechanisms of muscle wasting is crucial for developing effective interventions.

Purpose of the Study:

• To review current knowledge on the pathophysiological mechanisms of muscle loss in aging and chronic diseases.
• To discuss the similarities and differences between sarcopenia and cachexia.
• To explore evolving interventional strategies and therapeutic targets for muscle wasting.

Main Methods:

• Literature review of pathophysiological mechanisms.
• Comparative analysis of sarcopenia and cachexia.
• Discussion of current and potential therapeutic interventions.

Main Results:

• Muscle wasting is common in aging and conditions like heart failure.
• Sarcopenia (age-related muscle loss) differs from cachexia (disease-related muscle wasting) in weight loss association.
• Identified potential drug candidates include myostatin antagonists, ghrelin agonists, and selective androgen receptor modulators.

Conclusions:

• Current treatments involve exercise, nutrition, and drugs, though drug options are limited to clinical trials.
• Optimizing skeletal muscle mass and function in aging and chronic illness remains an ongoing challenge.
• Future research holds potential for novel therapeutic interventions against muscle wasting diseases.