Thermo-responsive cell culture carrier: Effects on macrophage functionality and detachment efficiency.

Area of Science:

• Biomaterials Science
• Cell Biology
• Tissue Engineering

Background:

• Enzymatic harvesting of macrophages can cause unintended activation, impacting their function for tissue engineering.
• Thermo-responsive polymers enable gentle cell detachment via temperature shifts, avoiding artificial activation.

Purpose of the Study:

• To characterize thermo-responsive polymers for macrophage culture and gentle detachment.
• To evaluate the suitability of different polymer species as cell substrates.

Main Methods:

• Primary human monocyte- and THP-1-derived macrophages were cultured on thermo-responsive polymers.
• Macrophage function was assessed through phagocytosis and cytokine secretion assays post-lipopolysaccharide stimulation.

Main Results:

• Primary monocyte-derived macrophages showed no impaired viability or altered function on thermo-responsive polymers compared to conventional culture.
• THP-1 derived macrophages exhibited differential responses based on culture and stimulation conditions.
• Poly(vinyl methyl ether) based polymers and UpCell carriers are suitable for primary macrophage culture and detachment.

Conclusions:

• Thermo-responsive polymers, particularly poly(vinyl methyl ether) blends, are promising for culturing and gently detaching primary macrophages.
• While not yet outperforming standard methods, these polymers offer a basis for future improvements in macrophage culture for tissue engineering.
• Future work can optimize polymer properties for enhanced cell recovery and reduced processing steps.