Cell Cycle Regulation

Cell cycle regulation is the complex network of molecular mechanisms that control the progression and timing of cell division. This process ensures that cells only divide when appropriate, maintaining tissue homeostasis and preventing uncontrolled proliferation, which can lead to diseases such as cancer. Key components include cyclins, cyclin-dependent kinases (CDKs), the Anaphase-Promoting Complex/Cyclosome (APC/C), and checkpoint proteins like Rb, p53, and p21. Regulation occurs through internal and external signals and checkpoints that monitor DNA replication, chromosome segregation, and overall cellular integrity. Dysregulation can result in uncontrolled proliferation, a hallmark of cancer, and many anti-cancer therapies target components like CDKs or proteasomal degradation pathways involved in this regulatory system.

Other names

Cell division controlCell cycle checkpoints

CDK inhibitors: Block cell cycle progression by inhibiting cyclin-dependent kinases. Proteasome inhibitors: Disrupt protein degradation pathways, leading to cell cycle arrest and apoptosis. DNA damaging agents: Induce DNA damage, triggering cell cycle checkpoints and potentially apoptosis.