PPARG and cancer: In several diseases, the WNT/β-catenin pathway and PPARγ act in an opposite manner as in cancers, such as gliomas (15, 50), neurodegenerative diseases, such as Alzheimer’s disease (51, 52), amyotrophic lateral sclerosis (53, 54), multiple sclerosis (55), age-related macular degeneration (56, 57), and fibrosis processes (58–60).