Tag: Cell cycle

Terminally differentiated cells are highly specialized cells that have undergone a differentiation program and generally withdraw permanently from productive cell division. This article explains the molecular mechanisms of terminal differentiation, its relationship with cell-cycle exit, and the differences between terminal differentiation, quiescence, and cellular senescence.

Cellular quiescence is a reversible non-proliferative state in which cells temporarily withdraw from the active cell cycle while remaining viable and metabolically active. This article explores the molecular mechanisms regulating quiescence, its relationship with the G₀ phase, cell-cycle re-entry, stem-cell maintenance, metabolism, transcription, and cellular quality control, as well as its distinction from senescence and terminal differentiation.

The ubiquitin-proteasome system is the master regulator of the cell cycle, controlling cyclin degradation, checkpoint progression, and mitotic exit. This comprehensive guide covers UPS mechanisms in G1/S transition, S phase, mitosis, and cancer therapy.

The G0 phase is a reversible state of cellular dormancy where cells exit the cell cycle. Discover how quiescence protects stem cells, its role in aging, and the mechanisms that regulate this vital cellular state.

Cell‑cycle and proliferation study tools provide essential insights into how cells grow and divide. Techniques such as BrdU and EdU incorporation, flow‑cytometric DNA content analysis, Ki‑67 and phospho‑H3 staining, FUCCI reporters and genetic manipulation allow researchers to measure cell‑cycle phases, DNA synthesis and mitotic activity with high precision.

DNA replication is the process cells use to accurately copy their genomes before division. Learn about replication origins, helicase, primase, DNA polymerase, leading and lagging strands, Okazaki fragments, proofreading, telomeres, and replication repair.