Abstract:
PURPOSE:To examine the effect of elevated extracellular glucose, thus simulating diabetes, on migration, adhesion and proliferation of SV40 transformed human corneal epithelial (HCE) cells. METHODS:HCE cells were maintained in serum supplemented media containing 5 mM, 17.5 mM or 38 mM D-glucose. Cell migration was determined using Blind well chambers fitted with fibronectin/collagen I coated filters. In adhesion experiments, cells were allowed to adhere to extracellular matrix protein-coated wells for 90 min at 37 degrees C. Non-adherent cells were removed by washing, then the fluorochrome calcein-AM was added to quantitate the number of attached cells. Proliferation was determined by plating the cells at low density, then quantitating viable cells with calcein-AM 5 to 7 days later. RESULTS:Raising extracellular glucose from 5 mM to 17.5 mM significantly increased cell migration by 42%. When glucose was further raised to 38 mM, migration was not significantly different from that in 5 mM glucose. Adhesion to fibronectin and collagen I (but not IV) was significantly increased (62% and 32% respectively) when cells were cultured in 17.5 mM glucose. Similarly, proliferation was increased by 44%. Adhesion and proliferation tended to be decreased at 38 mM compared to 17.5 mM glucose, but not significantly so. In the presence of 5 mM glucose and mannitol (12.5 mM or 33 mM), neither migration, adhesion nor proliferation were significantly different from that in 5 mM glucose alone. CONCLUSION:Elevated extracellular glucose modulates migration, adhesion and proliferation of HCE cells. The effects are dependent on the concentration of glucose and are not due to changes in osmolality since mannitol failed to produce similar results. Our in vitro findings suggest that high-glucose effects may directly contribute to the etiology of impaired corneal wound healing in diabetes.
journal_name
Curr Eye Resjournal_title
Current eye researchauthors
McDermott AM,Kern TS,Murphy CJdoi
10.1076/ceyr.17.9.924.5133subject
Has Abstractpub_date
1998-09-01 00:00:00pages
924-32issue
9eissn
0271-3683issn
1460-2202journal_volume
17pub_type
杂志文章abstract::Focused ultrasound concentrates a large amount of ultrasonic energy into a small focal zone. We have used new techniques to develop a transducer that creates intracorneal, thermally induced lesions in rabbit eyes in vitro. Histologic study shows that these lesions are confined to the stroma and that the procedure caus...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688209000777
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journal_title:Current eye research
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