The capacity of a chemical agent, hormone, or growth factor to induce a cell to commence cell division, known as mitosis, thereby promoting proliferation. In the context of tissue health, this effect is essential for processes like wound healing and the regeneration of muscle and bone tissue. It is a fundamental signal for growth and cellular replacement.
Origin
Derived from the Greek words mitos (thread, referring to chromosomes) and genos (birth), the term is fundamental to cell biology and is applied clinically to understand tissue turnover and repair kinetics. Understanding its regulation is key to both regenerative medicine and oncology.
Mechanism
Hormones like insulin-like growth factor 1 (IGF-1) and specific cytokines exert their mitogenic effect by binding to cell surface receptors, initiating intracellular signaling cascades that ultimately trigger the cell cycle machinery and DNA replication. Maintaining this effect in necessary tissues, while strictly suppressing it in others, is a critical clinical balancing act.
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