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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Soderland, Carl Jiang, Youde Liu, Li Miller, Matthew J. Steinle, Jena J. Kern, Timothy S. Pintar, John Zhang, Qiuhua Peng, Bonnie Tang, Jie |
| Description | Country affiliation: United States Author Affiliation: Zhang Q ( Department of Ophthalmology, University of Tennessee Health Science Center, Memphis, Tennessee, USA.) |
| Abstract | PURPOSE: We hypothesized that loss of insulin-like growth factor binding protein 3 (IGFBP-3) signaling would produce neuronal changes in the retina similar to early diabetes. METHODS: To understand better the role of IGFBP-3 in the retina, IGFBP-3 knockout (KO) mice were evaluated for neuronal, vascular, and functional changes compared to wild-type littermates. We also cultured retinal endothelial cells (REC) in normoglycemia or hyperglycemia to determine the interaction between IGFBP-3 and TNF- , as data indicate that both proteins are regulated by ß-adrenergic receptors and respond antagonistically. We also treated some cells with Compound 49b, a novel ß-adrenergic receptor agonist we have reported previously to regulate IGFBP-3 and TNF- . RESULTS: Electroretinogram analyses showed decreased B-wave and oscillatory potential amplitudes in the IGFBP-3 KO mice, corresponding to increased apoptosis. Retinal thickness and cell numbers in the ganglion cell layer were reduced in the IGFBP-3 KO mice. As expected, loss of IGFBP-3 was associated with increased TNF- levels. When TNF- and IGFBP-3 were applied to REC, they worked antagonistically, with IGFBP-3 inhibiting apoptosis and TNF- promoting apoptosis. Due to their antagonistic nature, results suggest that apoptosis of REC may depend upon which protein (IGFBP-3 versus TNF- ) is active. CONCLUSIONS: Taken together, loss of IGFBP-3 signaling results in a phenotype similar to neuronal changes observed in diabetic retinopathy in the early phases, including increased TNF- levels. |
| ISSN | 01460404 |
| e-ISSN | 15525783 |
| DOI | 10.1167/iovs.13-12497 |
| Journal | Investigative Opthalmology & Visual Science |
| Issue Number | 8 |
| Volume Number | 54 |
| Language | English |
| Publisher | Association for Research in Vision and Ophthalmology |
| Publisher Date | 2013-08-09 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Apoptosis Physiology Diabetes Mellitus, Experimental Diabetic Retinopathy Metabolism Endothelial Cells Insulin-like Growth Factor Binding Protein 3 Retina Tumor Necrosis Factor-alpha Animals Blotting, Western Cells, Cultured Pathology Physiopathology Electroretinography Mice Mice, Inbred C57bl Mice, Knockout Signal Transduction Comparative Study Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. Discipline Ophthalmology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ophthalmology Sensory Systems Cellular and Molecular Neuroscience |
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