Definition
The process of cell division and growth resulting in an increase in cell number.
The process of cell division and multiplication resulting in an increase in cell number.
Related Claims
Synthesis
Cell proliferation, consistently defined across sources as the process of cell division and growth that increases cell number, is subject to multiple regulatory influences and forms a key mechanistic link between chromosomal abnormalities and cellular fitness. Aneuploidy, characterized by incorrect chromosome number, reliably impairs proliferation in mammalian cells through mechanisms that extend beyond simple chromosomal imbalance to include alterations in metabolic properties and reduced capacity for immortalization. The pervasive influence of proliferation on cellular phenotypes creates significant analytical challenges, as proliferation-related gene expression strongly confounds outcome associations in breast cancer gene signatures—a confounding effect that cannot be eliminated by simply removing classical cell cycle genes from analysis, suggesting that proliferation influences transcriptional programs more broadly than previously appreciated. While the relationship between chromosomal instability and proliferation is established, it remains unresolved whether chromosome missegregation alone can generate viable aneuploid cell populations, and the finding that proliferation programs vary substantially even among individual cells within a single glioblastoma tumor raises questions about how proliferative heterogeneity contributes to tumor behavior and therapeutic resistance.