title: The effects of glucose on the expression of MMP and TIMP in cultured retinal pigment epithelial cells.
abstract: This study evaluated the effects of glucose in human retinal pigment epithelial (RPE) cells to investigate the cause of diabetic retinal complications. Human RPE cells were cultured in media containing 5.5 mM, 11.0 mM, and 16.5 mM D-glucose. The present study performed proliferation and migration assays, and conducted western blotting for the protein expression, as well as RT-PCR for the mRNA expression, of MMP-2 and -9, and TIMP-1 and -2. The results of the western blotting analysis showed that increasing glucose concentration significantly increased the expression of MMP-2 and -9, but significantly decreased the expression of TIMP-1 and -2. Moreover, the RT-PCR results indicated significant increases in the mRNA expression of MMP-2 and -9, as well as of TIMP-1 and -2, by raising glucose concentration. This study provides fundamental data for future research on the mechanism of retinal complication in diabetic patients.
authors.affiliation: 21c Eye Hospital, Inje University, College of Medicine, Seoul Paik Hospital, Seoul, Korea.
authors.forename: Dongeun
authors.initials: D
authors.lastname: Lee
authors.forename: Jae Suk
authors.initials: JS
authors.lastname: Kim
authors.forename: Ho Kyun
authors.initials: HK
authors.lastname: Cho
authors.forename: Joo Hwa
authors.initials: JH
authors.lastname: Lee
mesh_terms: D015153:Blotting, Western; D002465:Cell Movement; D049109:Cell Proliferation; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D005947:Glucose / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D020782:Matrix Metalloproteinases / Q000235:genetics / Q000378:metabolism*; D010857:Pigment Epithelium of Eye / Q000187:drug effects* / Q000201:enzymology; D012333:RNA, Messenger / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013997:Time Factors; D019714:Tissue Inhibitor of Metalloproteinases / Q000235:genetics / Q000378:metabolism*
chemical_list: D012333:RNA, Messenger; D019714:Tissue Inhibitor of Metalloproteinases; D020782:Matrix Metalloproteinases; D005947:Glucose