miRNA-137 is reportedly implicated in various diseases [18–20]; a previous report suggested that miR-137 is downregulated in LPS-induced chondrocytes and articular cartilage samples, and that miR-137, via the AMPK/NF-κB signaling pathway, prevents TCF4 from reversing the progression of osteoarthritis [21]. The gene discussed is TCF4; the disease is osteoarthritis.