Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0086543 (cataract)
 29,165 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

To investigate the mechanisms responsible for lymphocyte accumulation in the eye in uveitis, we examined iris biopsy specimens that were obtained from 10 patients with uveitis and from 12 patients with cataract for the presence of adhesion molecules on vascular endothelium, uveal cells, and infiltrating inflammatory cells. Immunoperoxidase staining of iris biopsy specimens that were obtained from patients with uveitis revealed an increased expression of intercellular adhesion molecule 1 (CD54) on endothelial cells, lymphocytes, fibroblasts, and iris epithelial cells. Seven of the 10 iris biopsy specimens that were obtained from patients with uveitis had a significant inflammatory cell infiltrate. Lymphocytes (CD2 positive) that infiltrated the iris were predominantly helper T cells (70%) and strongly expressed the lymphocyte function-associated antigen 1 (CD11a, CD18) molecule, the ligand for intercellular adhesion molecule 1, in four of the seven biopsy specimens. In contrast, small numbers of lymphocytes were evident in only three (25%) of the iris biopsy specimens that were obtained from patients with cataract. Vascular endothelium from the latter group did not express intercellular adhesion molecule 1 or endothelial leukocyte adhesion molecule 1. The results of this study revealed the enhanced expression of vascular endothelial cell and lymphocyte adhesion molecules in the iris biopsy specimens that were obtained from patients with uveitis. The presence of these receptors and their presumed ligands may have important implications for the role of these molecules in the pathogenesis of uveitis.
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PMID:Distribution of lymphocytes and cell adhesion molecules in iris biopsy specimens from patients with uveitis. 173 6

A small molecule that safely mimics the ability of dietary restriction (DR) to delay age-related diseases in laboratory animals is greatly sought after. We and others have shown that resveratrol mimics effects of DR in lower organisms. In mice, we find that resveratrol induces gene expression patterns in multiple tissues that parallel those induced by DR and every-other-day feeding. Moreover, resveratrol-fed elderly mice show a marked reduction in signs of aging, including reduced albuminuria, decreased inflammation, and apoptosis in the vascular endothelium, increased aortic elasticity, greater motor coordination, reduced cataract formation, and preserved bone mineral density. However, mice fed a standard diet did not live longer when treated with resveratrol beginning at 12 months of age. Our findings indicate that resveratrol treatment has a range of beneficial effects in mice but does not increase the longevity of ad libitum-fed animals when started midlife.
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PMID:Resveratrol delays age-related deterioration and mimics transcriptional aspects of dietary restriction without extending life span. 1859 63

Age-related cataract and age-related macular degeneration (AMD) is the leading cause of vision impairment and blindness in developing and developed countries, respectively. Oxidative stress and oxidation products have been verified to play important roles in these two aging diseases. Recent research has demonstrated that there are significant oxygen gradients in the eye. Therefore, we propose a new hypothesis that these two diseases could be summarized as oxygen receptor dysfunction diseases of which the main points are as follows. Oxygen in the retinal and choroidal vasculature is transferred into the vitreous cavity by a special switching valve or oxygen receptor that might exist in the internal limiting membrane, vascular endothelium or posterior vitreous surface. It is then transported from the posterior segment to the anterior segment by vitreous collagen fibrilla networks, which work similar to a gas pipeline. Posterior vitreous detachment is the starting point of these two diseases by inducing formation of the local hyperoxia region, which results in the occurrence of age-related cataract and macular degeneration. Thus, an innovative anti-oxidative therapy should be added to the traditional treatment of age related macular degeneration. Some associated experimental and clinical approaches are suggested in our paper to test this hypothesis.
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PMID:Age-related cataract and macular degeneration: Oxygen receptor dysfunction diseases. 2604 22