Primary Intestinal Fibroblasts: Isolation, Cultivation, and Maintenance.

Intestinal fibroblasts maintain homeostasis and contribute to inflammatory responses and the development of cancer. Intestinal fibroblasts express pattern recognition receptors which can mount an immune response. Since intestinal fibroblasts interact with diverse immune and nonimmune cells, further insights into the biology of intestinal fibroblasts could expand our knowledge of the development, homeostasis, and pathophysiology of the intestine. Here, we describe a simple protocol for the isolation, cultivation, and maintenance of primary fibroblasts from the mouse colon. These cells express α-smooth muscle actin, a characteristic of specialized contractile fibroblasts called myofibroblasts. We also outline the use of these colonic fibroblasts for immunoblotting and immunofluorescence assays with or without stimulation with a growth factor.