Use the cell suspensions obtained after digestion of mouse knee joints, and seed the suspension on the collagen-coated dish. Incubate the dish for one hour at 37 degrees Celsius in a humidified atmosphere with 5%carbon dioxide. After incubation, collect non-adherent cells using a pipette.
Wash the collagen coated dish with culture medium, and collect the medium. Then, add fresh medium to the dish to culture the adherent cells that exhibit a fibroblastoid morphology. Treat the cells with 0.05%trypsin in Hank's balanced salt solution, and passage the sub confluent cells.
If highly pure fibroblast-like cells are required, perform repeated passaging. Ensure to use cells with less than five passages. Fibroblast-like cells were isolated from inflammatory arthritis tissue, induced in seven to eight weeks old female C57BL/6 mice.
The purity of the isolated cells was assessed by RTQPCR mRNA expression of synovial fibroblast markers, such as Vcam1, Cdh11, Col6a1, and Csf1 in the isolated cells suggested that the fibroblast-rich fractions were isolated from synovitis tissue.
