Related Experiment Video

Updated: Jun 25, 2025

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
12:02

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

Published on: June 6, 2017

27.3K

Defensins regulate cell cycle: Insights of defensins on cellular proliferation and division

Shuang Li1, Rongrong Mu2, Xueqin Guo3

  • 1Institute of Wound Prevention and Treatment, Shanghai University of Medicine & Health Sciences, Shanghai, 201318, China.

Life Sciences
|May 22, 2024
PubMed

Insights

Defensins, antimicrobial peptides, regulate cell cycle checkpoints, impacting cell proliferation. Their dysregulation is linked to cancer, while they also aid tissue repair and immune response.

Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Defensins are key antimicrobial peptides crucial for host defense against pathogens.
  • Emerging evidence reveals defensins modulate cell cycle progression, affecting cell proliferation.
  • Dysregulation of defensin expression is implicated in cancer development and progression.

Purpose of the Study:

  • To review the multifaceted roles of defensins.
  • To highlight their impact on cell cycle regulation.
  • To discuss implications in cancer, tissue repair, and immune responses.

Main Methods:

  • Literature review of studies on defensin function.
  • Analysis of defensin's role in cell cycle checkpoints (G1 arrest, S/M transition).
  • Examination of defensin involvement in cancer, inflammation, angiogenesis, and tissue repair.

Main Results:

  • Defensins influence cell cycle checkpoints, affecting normal and cancerous cell proliferation.
  • Altered defensin expression contributes to uncontrolled cell growth and tumor formation.
  • Defensins promote inflammation resolution, angiogenesis, and tissue repair processes.

Conclusions:

  • Defensins possess significant cell cycle regulatory functions with broad implications.
  • Their roles extend beyond antimicrobial activity to encompass cancer progression and tissue homeostasis.
  • Defensins are critical mediators of host defense, immune function, and microenvironmental responses.
Keywords:
Cell cycleCell proliferationDefensinTissue repair

More Related Videos

Analysis of Cell Cycle Position in Mammalian Cells12:19

Analysis of Cell Cycle Position in Mammalian Cells

Published on: January 21, 2012

60.4K
Live-cell Imaging of Fungal Cells to Investigate Modes of Entry and Subcellular Localization of Antifungal Plant Defensins08:39

Live-cell Imaging of Fungal Cells to Investigate Modes of Entry and Subcellular Localization of Antifungal Plant Defensins

Published on: December 24, 2017

7.1K

Related Concept Videos

Molecular Factors Affecting Cell Division01:27

Molecular Factors Affecting Cell Division

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...
3.1K
Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
35.3K
Inhibition of Cdk Activity02:34

Inhibition of Cdk Activity

The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
4.7K
The Cell Cycle Control System01:28

The Cell Cycle Control System

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...
2.8K
DNA Damage can Stall the Cell Cycle02:37

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
9.1K
Cells Coordinate Growth and Proliferation02:36

Cells Coordinate Growth and Proliferation

Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
4.5K