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The Extracellular Matrix

The Extracellular Matrix

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...

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...

Decreasing Function

Decreasing Function

A decreasing function describes a relationship where the output consistently declines as the input increases. This means that for any two input values, if one is greater than the other, the corresponding output is smaller. Mathematically, a function f is decreasing on an interval I if for every x1 < x2 in I, f (x1) > f (x2). This type of behavior is visually identified on a graph that slopes downward from left to right.The nature of a function can be analyzed by calculating...

Mechanisms of Membrane Domain Formation

Mechanisms of Membrane Domain Formation

Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...

Yeast Signaling

Yeast Signaling

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Related Experiment Video

Updated: Jan 24, 2026

Strategic Endothelial Cell Tube Formation Assay: Comparing Extracellular Matrix and Growth Factor Reduced Extracellular Matrix

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Published on: August 14, 2016

Saccharides in straw hydrolysate decrease cell membrane damage by phenolics by inducing the formation of

Xiahui Wang¹, Shouqing Cui¹, Jiajun Hu¹

¹Shanghai Key Laboratory of Bio-energy Crops, School of Life Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, China.

Carbohydrate Polymers

|June 2, 2019

Summary

Soluble polysaccharides from rice straw protect yeast during ethanol production by forming extracellular matrices. This enhances cell integrity and boosts ethanol yield, offering new strategies for biofuel processes.

Keywords:

Ethanol fermentation Phenolic acids Polysaccharides Protective effects Rice straw

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Area of Science:

Biotechnology and Bioengineering
Microbial Physiology

Background:

Rice straw bioconversion to ethanol addresses energy needs and waste management.
Phenolic acids (PAs) during saccharification inhibit yeast (Saccharomyces cerevisiae) and reduce ethanol production.

Purpose of the Study:

Investigate the role of soluble polysaccharides (SPs) in mitigating PA inhibition.
Determine how SPs influence extracellular matrix (EM) formation and yeast cell integrity.

Main Methods:

Characterization of SPs using High-Performance Liquid Chromatography (HPLC) and Fourier Transform Infrared Spectroscopy (FT-IR).
Assessing alcohol dehydrogenase activity and intracellular redox state.
Microbial analysis using flow cytometry, confocal laser scanning microscopy, and atomic force microscopy.

Main Results:

SPs reduced PA inhibition of alcohol dehydrogenase activity and improved intracellular redox balance.
Phenolic acids damaged yeast cell membranes and altered microbial morphology.
SPs promoted the synthesis of a polysaccharide-dependent extracellular matrix, protecting cell membranes from PA stress.

Conclusions:

Soluble polysaccharides play a crucial protective role for Saccharomyces cerevisiae against phenolic acid toxicity during rice straw saccharification.
The formation of extracellular matrices is key to maintaining cellular integrity and enhancing ethanol production efficiency.
These findings offer novel strategies for optimizing pretreatment and saccharification in lignocellulosic biofuel production.