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Related Concept Videos

Stem Cell Niche01:26

Stem Cell Niche

The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Cell Adhesion Molecules - Types and Functions01:20

Cell Adhesion Molecules - Types and Functions

Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
CAM Families
The Integrin family of proteins is primarily  involved in a...
Cell Adhesion Molecules - Types and Functions01:20

Cell Adhesion Molecules - Types and Functions

Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
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Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
Anchoring Junctions01:03

Anchoring Junctions

Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...

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Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
09:14

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Published on: June 13, 2014

Integrin-mediated adhesion and stem-cell-niche interactions.

Stephanie J Ellis1, Guy Tanentzapf

  • 1Department of Cellular and Physiological Sciences, University of British Columbia, Life Science Institute, Vancouver, Canada.

Cell and Tissue Research
|July 10, 2009
PubMed
Summary
This summary is machine-generated.

Integrin-mediated cell adhesion regulates stem cell behavior and niche maintenance. Dysregulation of these stem cell-niche interactions is linked to cancer progression and metastasis.

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Area of Science:

  • Cell Biology
  • Stem Cell Biology
  • Biochemistry

Background:

  • Stem cell behavior is regulated by intrinsic and extrinsic cues.
  • Integrin-mediated cell adhesion to the extracellular matrix is a key extrinsic cue.
  • Integrins shape the stem cell niche, influencing stem cell function and maintenance.

Purpose of the Study:

  • To explore the role of integrins in stem cell behavior and niche regulation.
  • To understand how integrin-mediated adhesion influences stem cell homing, maintenance, proliferation, and self-renewal.
  • To investigate the link between integrin signaling in the stem cell niche and cancer progression.

Main Methods:

  • Literature review of studies on integrin function in stem cell niches.
  • Analysis of the diverse roles of integrins in stem cell maintenance and behavior.
  • Examination of the implications of integrin-mediated signaling in cancer metastasis.

Main Results:

  • Integrins are crucial for stem cell homing and retention within their niche.
  • Integrin-mediated adhesion regulates stem cell proliferation, self-renewal, and division orientation.
  • Integrin signaling within the stem cell niche is implicated in cancer progression and metastasis.

Conclusions:

  • Integrins are critical regulators of stem cell behavior and stem cell niche interactions.
  • Understanding integrin-mediated adhesion is vital for stem cell research and cancer biology.
  • Targeting integrin pathways may offer therapeutic strategies for cancer treatment.