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. 2019 Apr 27;477(8):1800–1812. doi: 10.1097/CORR.0000000000000713

Fig. 4.

Fig. 4

Proposed mechanisms for PPARG involvement in the pathophysiology of ONFH are shown. (A) PPARG function in a healthy state with low levels of expression yielding normal bone architecture. (B) Pathologic upregulation of PPARG, either through SNPs or pharmacologic modulation with TZD drugs, altering pathways leading to osteonecrosis in bone.