Expression of antiapoptotic and proapoptotic molecules in diabetic retinas.
PurposeTo investigate the expression of the antiapoptotic and proapoptotic markers in diabetic retinas.MethodsIn total, 12 donor eyes from six subjects with diabetes mellitus, and 10 eyes from five nondiabetic subjects without known ocular disease serving as control subjects were examined. Immunohistochemical techniques were used with antibodies directed against cyclooxygenase-2 (Cox-2), Akt (protein kinase B), Mcl-1, Bad, cytochrome c, apoptosis-inducing factor (AIF), tumour necrosis factor receptor-1-associated death domain protein (TRADD), and Fas-associated death domain protein (FADD).ResultsIn retinas from all subjects without diabetes, cytoplasmic immunoreactivity for the antiapoptotic molecules Cox-2, Akt, and Mcl-1 was noted in ganglion cells. Cytoplasmic immunostaining for Cox-2 was also noted in the retinal pigment epithelial cells. Weak immunoreactivity for the mitochondrial apoptogenic proteins cytochrome c, and AIF was noted in the inner segments of photoreceptors, in the inner one-third of the outer plexiform layer, in cells in the inner nuclear layer, in the inner plexiform layer, and in ganglion cells. There was no immunoreactivity for the other antibodies tested. All diabetic retinas showed de novocytoplasmic immunoreactivity for Bad in ganglion cells, and in occasional cells in the inner nuclear layer. Upregulation of cytochrome cand AIF immunoreactivity was noted. Cox-2, Akt, and Mcl-1 immunoreactivity was not altered in the diabetic retinas. There was no immunoreactivity for TRADD, and FADD.ConclusionsGanglion cells in diabetic and nondiabetic retinas express the antiapoptotic molecules Cox-2, Akt, and Mcl-1. Retinal ganglion cells express the proapoptotic molecule Bad in response to diabetes-induced neuronal injury. Diabetic retinas show upregulation of the mitochondrial proteins cytochrome c, and AIF.Eye (2007) 21, 238-245. doi:10.1038/sj.eye.6702225; published online 20 January 2006.[1]References
- Expression of antiapoptotic and proapoptotic molecules in diabetic retinas. Abu El-Asrar, A.M., Dralands, L., Missotten, L., Geboes, K. Eye (London, England) (2007) [Pubmed]
Annotations and hyperlinks in this abstract are from individual authors of WikiGenes or automatically generated by the WikiGenes Data Mining Engine. The abstract is from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.About WikiGenesOpen Access LicencePrivacy PolicyTerms of Useapsburg
