QRT-PCR was performed as previously described(13 (link)). TaqMan gene expression assay primer/probes were purchased from Applied Biosystems (Foster City, CA) for cyclophilin A (Hs99999904_m1), OGT (Hs00914634_g1), SIRT1 (Hs01009005_m1), MMP-9 (Hs00234579_m1).