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The Extracellular Matrix

The Extracellular Matrix

In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.Composition of the Extracellular MatrixThe extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse molecules.

The Extracellular Matrix

The Extracellular Matrix

Overview
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...

Healing II: Complications

Healing II: Complications

Complications during healing arise when tissue repair is altered by local or systemic factors. These changes involve abnormal collagen deposition, altered biomechanics, and reduced vascular supply, impairing restoration of normal structure and function.Loss of FunctionScar tissue differs significantly from the original tissue it replaces. In the skin, fibrosis lacks adnexal structures such as hair follicles, sebaceous glands, and sweat glands. Their absence reduces tactile sensitivity, impairs...

Overview of Cell-Matrix Interactions

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...

Extracellular Matrix

Extracellular Matrix

Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...

Cell-matrix's Response to Mechanical Forces

Cell-matrix's Response to Mechanical Forces

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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Related Experiment Video

Updated: Jun 4, 2026

In Vitro Model of Human Cutaneous Hypertrophic Scarring using Macromolecular Crowding

In Vitro Model of Human Cutaneous Hypertrophic Scarring using Macromolecular Crowding

Published on: May 1, 2020

Cellular/extracellular matrix cross-talk in scar evolution and control.

Alan D Widgerow¹

¹Plastic Surgery Department, University of Witwatersrand, Johannesburg, South Africa. awidgerow@gmail.com

Wound Repair and Regeneration : Official Publication of the Wound Healing Society [And] the European Tissue Repair Society

|March 3, 2011

Summary

Understanding scar formation involves cellular communication and molecular events. Targeting this "dynamic reciprocity" offers new ways to improve scar healing and outcomes.

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Area of Science:

Cellular Biology
Tissue Engineering
Dermatology

Background:

Scar evolution and control principles are established.
Molecular-level events in scar formation are increasingly understood.
Continuous cellular cross-talk influences scar development.

Purpose of the Study:

To elaborate on the molecular mechanisms of scar evolution.
To define scar principles in terms of cellular/extracellular matrix interactions.
To explore potential interventions for improving scar outcomes.

Main Methods:

Elucidation of molecular sequences in scar formation.
Identification of cellular cross-talk pathways.
Discussion of principles like mechanostimulation and controlled inflammation.

Main Results:

Cellular cross-talk via signals, ions, proteins, and receptors is key.
Dynamic reciprocity between cells and extracellular matrix governs scars.
Understanding cross-talk enables potential manipulation for better scar outcomes.

Conclusions:

Scar evolution is driven by intricate molecular and cellular interactions.
Targeting cellular cross-talk presents novel therapeutic strategies for scar management.
Principles of mechanostimulation, hydration, inflammation control, and remodeling are crucial for intervention.