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Related Concept Videos

Adherens Junctions01:24

Adherens Junctions

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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
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Tension Response at Adherens Junctions01:26

Tension Response at Adherens Junctions

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The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
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Anchoring Junctions01:03

Anchoring Junctions

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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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Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
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Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

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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...
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Tight Junctions01:29

Tight Junctions

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Tight junctions are molecular seals between cells that prevent the leaking of fluids, ions, and other small solutes across cavities and compartments in multicellular organisms. They are mainly composed of claudin and occludin transmembrane proteins, and other proteins such as tricellulin and JAM (junctional adhesion molecule). All these proteins are 4-pass transmembrane proteins, except JAM, which is a single-pass transmembrane protein belonging to the immunoglobulin superfamily. The...
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Related Experiment Video

Updated: Aug 9, 2025

Utilizing the Precision-Cut Lung Slice to Study the Contractile Regulation of Airway and Intrapulmonary Arterial Smooth Muscle
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Utilizing the Precision-Cut Lung Slice to Study the Contractile Regulation of Airway and Intrapulmonary Arterial Smooth Muscle

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Membrane adhesion junctions regulate airway smooth muscle phenotype and function.

Wenwu Zhang1, Yidi Wu1, Susan J Gunst1

  • 1Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, Indiana, United States.

Physiological Reviews
|February 16, 2023
PubMed
Summary
This summary is machine-generated.

Airway smooth muscle cells adapt to their environment via adhesion junctions. These junctions link cells to the extracellular matrix, sensing mechanical forces and chemical signals to regulate cell function.

Keywords:
contractionfocal adhesionphenotype regulationsignal transductionsmooth muscle

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Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro
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In vitro Measurements of Tracheal Constriction Using Mice
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Related Experiment Videos

Last Updated: Aug 9, 2025

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Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro
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In vitro Measurements of Tracheal Constriction Using Mice
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In vitro Measurements of Tracheal Constriction Using Mice

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Area of Science:

  • Cell Biology
  • Physiology
  • Biophysics

Background:

  • Airway smooth muscle (ASM) cells are influenced by their local environment, including mechanical forces and extracellular matrix (ECM) components.
  • ASM cells dynamically modulate their properties in response to these environmental cues.
  • Membrane adhesion junctions are critical for mechanical coupling and signal transduction in ASM tissues.

Purpose of the Study:

  • To investigate how the local environment influences ASM cell physiology and phenotype.
  • To elucidate the role of membrane adhesion junctions in sensing and responding to environmental stimuli.
  • To understand the adaptive mechanisms of ASM cells.

Main Methods:

  • Focus on the molecular composition and function of membrane adhesion junctions.
  • Analysis of integrin proteins and their interaction with the ECM.
  • Examination of signal transduction pathways from adhesion complexes to the cytoskeleton and nucleus.

Main Results:

  • Adhesion junctions, composed of integrins and multiprotein complexes, mechanically link ASM cells to the ECM.
  • These junctions sense environmental signals, including mechanical forces and ECM constituents.
  • Signals are transduced through submembranous complexes to intracellular pathways, enabling rapid cellular adaptation.

Conclusions:

  • ASM cells possess sophisticated mechanisms to adapt to their local environment.
  • Membrane adhesion junctions and the actin cytoskeleton are dynamic structures essential for this adaptation.
  • The ability of ASM to respond to environmental changes is crucial for normal physiological function.