Fig. 2

GLP-1R is associated with the PKA/CREB pathway in cartilage tissues of the knee OA rat model. a Representative Western blots of immunoprecipitates (n = 5 per group). b Representative Western blots and quantification data of PKA, p-PKA, CREB and p-CREB levels in control, OA-1, OA-5, OA-10, OA-20 and OA-28 groups (n = 5 per group). * indicates P < 0.05 when compared with the control group