Mammalian cell propagation on derivatized polyacrylamide microcarriers

Area of Science:

• Biomaterials Science
• Cell Biology
• Biotechnology

Background:

• Microcarriers are crucial for cell culture, but their chemical properties significantly influence cell behavior.
• Understanding how microcarrier surface chemistry affects cell attachment, spreading, and growth is essential for optimizing cell propagation.

Purpose of the Study:

• To establish a system for investigating the impact of microcarrier chemical properties on cell attachment, spreading, and growth.
• To compare the efficacy of primary versus tertiary amino group derivatized polyacrylamide microcarriers for cell culture.

Main Methods:

• Polyacrylamide beads were synthesized using emulsion polymerization.
• Beads were derivatized to introduce controlled amounts of primary and tertiary amino groups.
• Five different cell strains (BHK, MDCK, CEF, MRC-5, FS) were cultured on these microcarriers.

Main Results:

• BHK cells showed faster attachment and spreading on primary amino derivatized beads compared to tertiary amino groups.
• Introducing hydrophobicity to the side chain with primary amino groups increased BHK cell attachment rates.
• Optimal cell growth for all tested cell types was observed with butyl and hexyl side chains.
• Hydrophobicity in the polymeric backbone reduced cell yields, while optimal hydrophobicity on primary amino derivatized microcarriers improved MDCK cell yield.

Conclusions:

• Polyacrylamide microcarriers with primary amino groups offer advantages for cell attachment and spreading.
• The chemical structure, including hydrophobicity and type of amino group, critically influences cell yield and morphology.
• Diaminohexane derivatized polyacrylamide microcarriers represent a promising alternative to conventional tertiary amino derivatized microcarriers.