EZH2 and mantle cell lymphoma: Overexpression of circCDYL in MCL cells promotes malignant proliferation, self-renewal and chemoresistance.Inhibition of circCDYL suppressed cell proliferation in vitro, consistent with its functions in regulating transcription, programmed cell death, cell death and apoptosis. CircCDYL might serve as a sponge for miR-101, targeting EZH2 and further regulating p21 and p27.