Polyvinyl alcohol/gelatin hydrogels regulate cell adhesion and chromatin accessibility

Area of Science:

• Biomaterials Science
• Cell Biology
• Biotechnology

Background:

• Cell adhesion is crucial for biological processes like cancer metastasis and wound healing.
• Current substrates for studying cell adhesion are often complex or expensive.
• There is a need for simple, low-cost, and effective substrates to regulate cell adhesion.

Purpose of the Study:

• To develop a novel, easily prepared, and cost-effective hydrogel system for controlling cell adhesion.
• To investigate the impact of varying gelatin concentrations on hydrogel properties and cell behavior.
• To explore how the hydrogel system influences mechanotransduction pathways and gene expression.

Main Methods:

• Fabrication of polyvinyl alcohol/gelatin hydrogels with varying gelatin concentrations using a dry-annealing method.
• Assessment of protein adsorption capabilities of the hydrogels.
• Quantification of cell adhesion area and cell morphology (spherical vs. non-spherical).
• Analysis of gene expression changes related to mechanotransduction and chromatin accessibility.

Main Results:

• Increasing gelatin concentration enhanced protein adsorption onto the hydrogels.
• Higher gelatin concentrations led to increased cell adhesion area and a greater ratio of non-spherical cells.
• The hydrogel system modulated the expression of genes involved in extracellular matrix (ECM) to nucleus mechanotransduction.
• Poor cell adhesion conditions significantly increased chromatin accessibility.

Conclusions:

• Polyvinyl alcohol/gelatin hydrogels offer a tunable platform for regulating cell adhesion.
• This hydrogel system provides a valuable tool for studying cell adhesion dynamics and mechanobiology.
• The findings open new avenues for designing advanced biomaterials for cell adhesion research and applications.