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Molecular Factors Affecting Cell Division

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Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...

The Cell Cycle Control System

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The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...

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The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...

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The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...

Positive Regulator Molecules

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To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.

Positive Regulator Molecules

Positive Regulator Molecules

Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.

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Related Experiment Video

Updated: Jun 9, 2026

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols

Published on: June 6, 2017

Epigenetic dynamics across the cell cycle.

Tony Bou Kheir¹, Anders H Lund

¹Biotech Research and Innovation Centre and Centre for Epigenetics, University of Copenhagen, Ole Maaløes vej 5, 2200 Copenhagen N, Denmark.

Essays in Biochemistry

|September 9, 2010

Summary

This summary is machine-generated.

Epigenetic chromatin modifications dynamically influence cell-cycle progression and genome accessibility. The cell cycle ensures the accurate inheritance of these crucial epigenetic modifications to daughter cells.

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Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis

Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis

Published on: December 5, 2017

Area of Science:

Molecular Biology
Cell Biology
Epigenetics

Background:

Cell-cycle progression relies on precise timing and coordination of events managed by transcriptional machinery and epigenetic mechanisms.
Epigenetic chromatin modifications are dynamic throughout the cell cycle, influencing and being influenced by its progression.
Chromatin modifiers play roles in gene expression, chromatin condensation, and chromosome segregation.

Purpose of the Study:

To summarize current knowledge on the dynamics of epigenetic chromatin modifications during cell-cycle progression.
To highlight the interplay between epigenetic mechanisms and cell-cycle regulation.

Main Methods:

Literature review and synthesis of existing research on epigenetic modifications and cell cycle.
Analysis of the regulatory roles of chromatin modifiers.
Examination of the inheritance of epigenetic marks through cell division.

Main Results:

Epigenetic chromatin modifications exhibit dynamic changes throughout the cell cycle.
These modifications impact gene expression, chromatin structure, and chromosome behavior.
The cell cycle is essential for maintaining epigenetic fidelity across cell generations.

Conclusions:

Epigenetic chromatin modifications are integral to cell-cycle control and genome regulation.
Understanding these dynamics is key to comprehending cell proliferation and inheritance.
Further research into the interplay between epigenetics and the cell cycle is warranted.