Inflammatory and hormonal mediators of cachexia

Area of Science:

• Physiology
• Endocrinology
• Immunology

Background:

• Body composition serves as an indicator of an organism's metabolic state.
• Changes in body composition occur more slowly than metabolic processes, making it a valuable tool for assessing physiologic status.
• Hormonal and immune mediators significantly influence metabolism and, consequently, body composition.

Purpose of the Study:

• To explore the role of hormonal and immune mediators in regulating body composition.
• To differentiate between daily metabolic regulators and life cycle-related hormones affecting body composition.
• To investigate the potential homeostatic role of cytokines in age-related body composition changes (sarcopenia).

Main Methods:

• Categorization of hormonal and immune mediators based on their regulatory functions.
• Identification of day-to-day regulators (insulin, glucagon).
• Identification of life cycle-related hormones (estrogens, androgens, growth hormone, prolactin, thyroid hormones, catecholamines, corticosteroids).
• Identification of immunologic mediators (cytokines: interleukin-1, tumor necrosis factor, interleukin-6).

Main Results:

• Hormonal and immune mediators are classified into three distinct categories.
• Specific hormones are identified as key regulators of metabolism and body composition.
• Cytokines are recognized for their role in driving metabolism and body composition in illness.

Conclusions:

• Body composition measurement provides a unique window into an organism's physiologic state.
• Hormonal and immune mediators are critical in regulating body composition.
• Further research is needed to clarify the role of cytokines in age-related sarcopenia.