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. 2017 Mar 28;7:45408. doi: 10.1038/srep45408

Figure 7. Model of Phd2 regulation of articular cartilage chondrocytes.

Figure 7

PHD2 inhibits HIF-1α which in turn inhibits PHD3 expression. In the absence of PHD2, HIF-1α translocates from the cytoplasm to the nucleus, binds to the hypoxia response element (HRE), and activates genes required for chondrocyte hypertrophy. In the presence of PHD2, HIF-1α undergoes prolyl hydroxylation and subsequent proteosomal degradation, and therefore, chondrocyte hypertrophy is reduced.