The integrated, body-wide physiological process of maintaining tissue integrity, replacing damaged cells, and regenerating functional components across multiple organ systems, which is crucial for longevity and healthspan. This repair process is heavily regulated by endocrine signals, including Growth Hormone (GH), Insulin-like Growth Factor 1 (IGF-1), and various sex steroids, alongside essential nutrient and immune factors. The efficiency of systemic cellular repair is a direct determinant of the rate of biological aging and overall vitality.
Origin
The concept is a generalization of the specific repair mechanisms known in histology and molecular biology, such as wound healing and protein turnover, framed within the context of whole-body wellness and anti-aging medicine. The ‘Systemic’ qualifier emphasizes the interconnected, multi-organ nature of the process, recognizing that repair is not localized but is centrally coordinated by the endocrine and nervous systems. This view emerged from research into the decline of regenerative capacity with age.
Mechanism
The repair mechanism is initiated by catabolic processes that clear damaged cellular components, followed by anabolic signaling pathways that promote cell proliferation, differentiation, and protein synthesis. GH and IGF-1 are pivotal, stimulating the proliferation of various cell types and enhancing the synthesis of structural proteins like collagen. This continuous, hormonally-mediated function ensures the structural and functional renewal of tissues, counteracting the cumulative damage from metabolic stress and time.
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