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Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

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Bioactive polyelectrolyte multilayers: hyaluronic acid mediated B lymphocyte adhesion.

Fernando C Vasconcellos¹, Albert J Swiston, Marisa M Beppu

¹Department of Thermofluidynamics, School of Chemical Engineering, State University of Campinas, UNICAMP, Campinas, São Paulo, Brazil.

Biomacromolecules

|August 28, 2010

Summary

Researchers developed biopolymer films using hyaluronic acid and chitosan to bind B lymphocytes via CD44 interactions. Optimizing pH and ionic strength enhances cell binding efficiency for applications in biosensors and immune engineering.

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Evaluation of the Interplay Between the Complement Protein C1q and Hyaluronic Acid in Promoting Cell Adhesion

Evaluation of the Interplay Between the Complement Protein C1q and Hyaluronic Acid in Promoting Cell Adhesion

Published on: June 15, 2019

Area of Science:

Biomaterials Science
Immunology
Surface Chemistry

Background:

Polyelectrolyte multilayers (PEMs) offer versatile platforms for surface functionalization.
Hyaluronic acid (HA) and chitosan are biocompatible polymers with potential for cell interactions.
Targeted cell binding is crucial for applications like biosensors and immune engineering.

Purpose of the Study:

To develop biopolymer-based polyelectrolyte multilayer films for effective B lymphocyte binding.
To investigate the CD44-hyaluronate interaction mechanism for selective cell adhesion.
To optimize film properties through controlled deposition for enhanced B cell capture.

Main Methods:

Fabrication of thin, biopolymer-based PEM films using layer-by-layer assembly of hyaluronic acid and chitosan.
Exploration of CD44-hyaluronate interactions for non-covalent B cell immobilization.
Systematic variation of solution deposition parameters (pH, ionic strength) to modulate film structure and cell binding efficiency.

Main Results:

PEM films demonstrated effective binding of B lymphocytes through CD44-hyaluronate interactions.
Low pH and added salt during hyaluronic acid deposition promoted loop/tail structures, increasing CD44 ligand availability and cell binding.
Chitosan-terminated films (no NaCl, pH 3.0) and hyaluronic acid-terminated films (with salt, pH 3.0) exhibited high lymphocyte binding efficiency, though binding strength varied.

Conclusions:

Hyaluronic acid is essential for CD44-mediated B lymphocyte binding to PEM films.
Controlled deposition conditions, particularly low pH and ionic strength, significantly enhance B cell binding efficiency.
Bioactive PEMs represent a promising technology for selective lymphocyte binding in biosensing and immune system engineering.