Mahavir Singh1,2, Akash K George1,2, Rubens Petit Homme1,2, Avisek Majumder2, Anwesha Laha2, Harpal S Sandhu3,4, Suresh C Tyagi2. 1. a Eye and Vision Science Laboratory, Department of Physiology , University of Louisville School of Medicine , Louisville , Kentucky , USA. 2. b Department of Physiology , University of Louisville School of Medicine , Louisville , Kentucky , USA. 3. c Department of Ophthalmology and Visual Sciences , University of Louisville School of Medicine , Louisville , Kentucky , USA. 4. d Kentucky Lions Eye Center, University of Louisville School of Medicine , Louisville , Kentucky , USA.
Abstract
PURPOSE: To characterize the global profile of circular RNAs (circRNAs) and their differential expression levels in homocysteine (Hcy)-treated ARPE-19 cells, a line of human retinal pigment epithelial (RPE) cells. MATERIALS AND METHODS: We treated ARPE-19 cells with and without Hcy to investigate the influence of Hcy on circRNA expression levels using dedicated human circRNA microarrays. RESULTS: A total of 12,233 circRNAs were identified out of them 54 were differentially expressed (17 were down-regulated, and 37 were up-regulated) with a fold change >2.0 (p < 0.05) in Hcy-treated versus untreated cells. CONCLUSIONS: To our knowledge, this is the first report profiling circRNAs in human RPE cells post-Hcy treatment mimicking hyperhomocysteinemic (HHcy) conditions that negatively affect retinal biology and vision. These findings are of potential clinical significance as they will help understand Hcy metabolism and HHcy-mediated diseases and identify potential diagnostic and therapeutic targets for eye diseases that are caused by elevated Hcy concentrations.
PURPOSE: To characterize the global profile of circular RNAs (circRNAs) and their differential expression levels in homocysteine (Hcy)-treated ARPE-19 cells, a line of human retinal pigment epithelial (RPE) cells. MATERIALS AND METHODS: We treated ARPE-19 cells with and without Hcy to investigate the influence of Hcy on circRNA expression levels using dedicated human circRNA microarrays. RESULTS: A total of 12,233 circRNAs were identified out of them 54 were differentially expressed (17 were down-regulated, and 37 were up-regulated) with a fold change >2.0 (p < 0.05) in Hcy-treated versus untreated cells. CONCLUSIONS: To our knowledge, this is the first report profiling circRNAs in human RPE cells post-Hcy treatment mimicking hyperhomocysteinemic (HHcy) conditions that negatively affect retinal biology and vision. These findings are of potential clinical significance as they will help understand Hcy metabolism and HHcy-mediated diseases and identify potential diagnostic and therapeutic targets for eye diseases that are caused by elevated Hcy concentrations.
Authors: William R Jeck; Jessica A Sorrentino; Kai Wang; Michael K Slevin; Christin E Burd; Jinze Liu; William F Marzluff; Norman E Sharpless Journal: RNA Date: 2012-12-18 Impact factor: 4.942