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Related Concept Videos

Integrins01:10

Integrins

Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM.
Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
Activation of Integrins01:15

Activation of Integrins

Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling."
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
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...
Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
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:...
Fibronectins Connect Cells with ECM01:25

Fibronectins Connect Cells with ECM

Fibronectin is an adhesive glycoprotein present in the extracellular matrix of embryogenic and adult tissue. These molecules primarily aid in regulating cell motility and attachment. A fibronectin molecule is composed of two identical polypeptide chains attached to each other by a pair of disulfide bonds at the C-terminal.
Both proteoglycans and collagen are attached to fibronectin proteins, which, in turn, are attached to integrin proteins. These integrin proteins interact with transmembrane...

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Localization of Plasma Membrane and Intracellular Neuronal Nicotinic Acetylcholine Receptors Using Quantitative Imaging in Mammalian Cells
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Localization of Plasma Membrane and Intracellular Neuronal Nicotinic Acetylcholine Receptors Using Quantitative Imaging in Mammalian Cells

Published on: December 19, 2025

Integrin beta 4 in neural cells.

Le Su1, Xin Lv, Junying Miao

  • 1Institute of Developmental Biology, School of Life Science, Shandong University, Jinan, 250100, China.

Neuromolecular Medicine
|June 3, 2008
PubMed
Summary
This summary is machine-generated.

Integrin beta 4, a key cell adhesion receptor, plays crucial roles in neural cells. Recent findings reveal its function and regulation in the central and peripheral nervous systems.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Integrin beta 4 (ITGB4) is a heterodimeric receptor predominantly found on epithelial cells.
  • It localizes to hemidesmosomes at the basement membrane zone, mediating cell adhesion.
  • Emerging research highlights ITGB4's roles in neural cells, including astrocytes, Schwann cells, neurons, and neural stem cells.

Purpose of the Study:

  • To review recent advancements in understanding the function and regulation of Integrin beta 4 in neural cells.
  • To explore ITGB4's involvement in neural cell attachment to the extracellular matrix and signal transduction.
  • To discuss ITGB4's role in peripheral nervous system invasion by Mycobacterium leprae.

Main Methods:

  • Literature review of recent studies on Integrin beta 4.
  • Analysis of research on ITGB4 expression and function in various neural cell types.
  • Examination of studies investigating ITGB4's role in neural development and disease.

Main Results:

  • Integrin beta 4 is expressed in diverse neural cell types within the central and peripheral nervous systems.
  • ITGB4 mediates extracellular matrix attachment and signal transduction in neural cells.
  • ITGB4 facilitates Mycobacterium leprae invasion of peripheral nerves by interacting with Schwann cells.

Conclusions:

  • Integrin beta 4 has significant, multifaceted roles in neural cell biology beyond its established epithelial functions.
  • Further research into ITGB4's regulation and function in the nervous system is warranted.
  • Understanding ITGB4's neural roles may offer therapeutic targets for neurological disorders and infections.