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Beclin 1 expression levels in cartilage tissues from patients with OA are reduced compared with the control, as demonstrated using three different methodologies, including (A) immunohistochemistry, (B) semi-quantitative polymerase chain reaction and (C) western blotting. (D) Quantification data of Beclin 1 expression. *P<0.05 vs. control. OA, osteoarthritis.
