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Hyaluronan Pericellular Matrix: Particle Exclusion Assay
1Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC, USA. melanie_simpson@ncsu.edu.
Methods in Molecular Biology (Clifton, N.J.)
|March 3, 2019
Summary
Particle exclusion assays visualize pericellular hyaluronan, a key indicator of cell status. This method uses aggrecan to detect and quantify hyaluronan in cell surface matrices.
Area of Science:
- Biochemistry
- Cell Biology
- Biomaterials Science
Background:
- Pericellular hyaluronan is a significant component of the extracellular matrix.
- Its abundance varies between cell types and can change dynamically with cellular conditions.
- Hyaluronan presence can serve as an indicator of cellular status.
Purpose of the Study:
- To describe a quick, semiquantitative particle exclusion assay for detecting pericellular hyaluronan.
- To utilize aggrecan to stabilize and amplify the hyaluronan-rich pericellular matrix.
- To enable microscopic observation and quantification of hyaluronan matrices.
Main Methods:
- Employing a particle exclusion assay using fixed red blood cells.
- Utilizing the hyaluronan-binding proteoglycan, aggrecan, for matrix stabilization.
- Microscopic image analysis to quantify clear zones representing excluded particles.
Main Results:
- The assay successfully visualizes pericellular envelopes rich in hyaluronan.
- Aggrecan enhances the detection and quantification of the hyaluronan matrix.
- Clear zones around cells correlate with the presence and amount of pericellular hyaluronan.
Conclusions:
- Particle exclusion assays provide a rapid method for assessing pericellular hyaluronan.
- This technique is valuable for studying hyaluronan dynamics and its relation to cell status.
- The assay offers a practical approach for visualizing and quantifying cell surface hyaluronan.
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