Fig. 6From: Vitamin D inhibits TNF-α induced apoptosis of human nucleus pulposus cells through regulation of NF-kB signaling pathwaySulfasalazine partially recovered the apoptosis rate of TNF-α-treated nucleus pulposus cells. A Cell apoptosis was determined by flow cytometry assay. B Western blot assay to assess the Bcl-2 and cleaved caspase-3 expressionBack to article page