Differential effects of macrophage subtype‐specific cytokines on fibroblast proliferation and endothelial cell function in co‐culture system
Year: 2024
Type: article
Abstract: Macrophages are involved in several critical activities associated with tissue repair and regeneration. Current approaches in regenerative medicine are focusing on leveraging the innate immune response to accelerate tissue regeneration and improve long‐term healing outcomes. Of particular interest in this regard are the currently known, four main M2 macrophage subtypes: M2 interleukin (IL)‐4,IL‐13 , M2 IC , M2 IL‐10 , M2 non‐selective adenosine receptor agonists (NECA) (M2 IL‐4,IL‐13 → M2 NECA ). In this study, rat bone marrow‐derived macrophages (M 0 ) were polarized to each of the four subtypes M2 IL‐4,IL‐13 → M2 NECA and cultured for 72 h in vitro. Luminex assay results highlighted increased production of tissue inhibitor of metalloproteinases‐1 (TIMP‐1) for M2 IL‐4,IL‐13 , higher amounts of transforming growth factor‐beta 1 (TGF‐β1) for M2 IL‐10 , and elevated vascular endothelial growth factor A (VEGF‐A) from M2 NECA . Co‐culture experiments performed with M2 IL‐10 macrophages and L929 fibroblasts highlighted the increased production of soluble collagen within the media as well as higher amounts of collagen in the extracellular matrix. Human umbilical vein endothelial cells (HUVECs) were co‐cultured with M2 NECA macrophages, which demonstrated an increase in intercellular adhesion molecule (ICAM) and platelet endothelial cell adhesion molecule (PECAM), as well as increased formation of endothelial tubes. The findings of this study emphasize a critical demand for further characterization and analyses of distinct M 2 subtypes and careful selection of specific macrophage populations for regeneration of specific tissue types. The current, broad classification of “M 2 ” may be sufficient in many general tissue engineering applications, but, as conditions are constantly in flux within the microenvironment in vivo, a higher degree of specificity and control over the initial M 2 subtype could result in more consistent long‐term outcomes where macrophages are utilized as part of an overall regenerative strategy.
DOI: 10.1002/jbm.a.37799
Authors: Ilaha Isali, Phillip McClellan, Thomas R. Wong, Sara Hijaz, David R. Fletcher, Guiming Liu, Tracey L. Bonfield, James M. Anderson, Adonis Hijaz, Ozan Akkus
Language: English
Topic: Wound Healing and Treatments
Subfield: Rehabilitation
Field: Medicine
Domain: Health Sciences
Open Access status: hybrid
Estimated APC paid: $4,220
Funders: Case Western Reserve University, National Institutes of Health, Clinical and Translational Science Collaborative of Cleveland, School of Medicine, Case Western Reserve University, National Institute of Diabetes and Digestive and Kidney Diseases, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Eunice Kennedy Shriver National Institute of Child Health and Human Development
OpenAlex ID: W4402653988