E-ISSN 2146-8362
 

Original Research 


Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice

Fayza Ezz Ahmad, Rania Ahmad Zidan.

Abstract
Background: High-fat diet (HFD) feeding is an important model to study the changes induced by insulin resistance, Type 2 diabetes mellitus and obesity including retinopathy. Vascular endothelial growth factor (VEGF) and p53 have been implicated in the development of retinopathy. Objectives: The aim of his study was to analyze histological retinal changes in a high-fat atherogenic mouse model and to evaluate the possible protective effect of simvastatin on these changes including its effects on the expression of VEGF and p53. Materials and Methods: A total of 27 mice (6 weeks old) were divided into 3 study groups according to their diet and treatment given; Group I - normal balanced diet-fed mice, Group II - HFD-fed mice, and Group III - HFD-fed mice treated with simvastatin daily for 30 weeks. All mice were followed up for 30 weeks. At the end of the study at 36 weeks of age, eye tissues were collected and retinal sections were examined using light microscopy. Comparison of the thickness of retinal layers in the three groups was carried out. The localization of VEGF in the retina was determined by immunohistochemical analysis, and apoptotic cell death was assessed using the p53. Results: In the HFD-fed mice, there was an increase in the retinal thickness associated with presence of wide intercellular spaces in the outer nuclear layer. Many cells in the inner nuclear layer showed cytoplasmic vacuolations. Expression of VEGF was significantly increased in the retinal ganglion cell layers and nuclear cell layers. Elevated p53 reaction was demonstrated within the inner retina. The histological changes were significantly improved in the simvastatin treated group. Conclusions: HFD-induced structural changes in the retinal layers and simultaneous upregulation of VEGF and p53. Administration of simvastatin improved these retinal alterations.

Key words: Hyperlipidemia , retinopathy, Vascular endothelial growth factor, P53, simvastatin


 
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Pubmed Style

Ahmad FE, Zidan RA. Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice. J Interdiscip Histopathol. 2017; 5(3): 83-91. doi:10.5455/jihp.20161231121440


Web Style

Ahmad FE, Zidan RA. Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice. http://www.ejmjih.com/?mno=246681 [Access: August 16, 2018]. doi:10.5455/jihp.20161231121440


AMA (American Medical Association) Style

Ahmad FE, Zidan RA. Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice. J Interdiscip Histopathol. 2017; 5(3): 83-91. doi:10.5455/jihp.20161231121440



Vancouver/ICMJE Style

Ahmad FE, Zidan RA. Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice. J Interdiscip Histopathol. (2017), [cited August 16, 2018]; 5(3): 83-91. doi:10.5455/jihp.20161231121440



Harvard Style

Ahmad, F. E. & Zidan, R. A. (2017) Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice. J Interdiscip Histopathol, 5 (3), 83-91. doi:10.5455/jihp.20161231121440



Turabian Style

Ahmad, Fayza Ezz, and Rania Ahmad Zidan. 2017. Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice. Journal of Interdisciplinary Histopathology, 5 (3), 83-91. doi:10.5455/jihp.20161231121440



Chicago Style

Ahmad, Fayza Ezz, and Rania Ahmad Zidan. "Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice." Journal of Interdisciplinary Histopathology 5 (2017), 83-91. doi:10.5455/jihp.20161231121440



MLA (The Modern Language Association) Style

Ahmad, Fayza Ezz, and Rania Ahmad Zidan. "Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice." Journal of Interdisciplinary Histopathology 5.3 (2017), 83-91. Print. doi:10.5455/jihp.20161231121440



APA (American Psychological Association) Style

Ahmad, F. E. & Zidan, R. A. (2017) Histological Study on the Protective Effect of Simvastatin on the Retinal Changes Induced by High-Fat Diet in Mice. Journal of Interdisciplinary Histopathology, 5 (3), 83-91. doi:10.5455/jihp.20161231121440





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