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)

The excised rat crystalline lens opacified when incubated aerobically with phenazine methosulfate, but no opacification was observed under anaerobic conditions. Morphological studies revealed development of opacification in the cortex. The opacification resembled that often seen in the early period of senile cataract as well as in naphthalene-induced and UV cataract. Both an increase in hydration and in electrolyte imbalance accompanied this opacification. Na,K-ATPase activity of the opacified lens was found to decrease. In order to investigate if activated oxygen is involved in these processes, we conducted an electron spin resonance study by means of a spin trapping technique. When the lens homogate was incubated with phenazine methosulfate, OH radicals were generated under aerobic but not under anaerobic conditions. Reduced pyridine nucleotides must be involved in the process, because the mixture of nicotinamide adenine dinucleotide phosphate [NAD(P)] and phenazine methosulfate did not generate OH radicals, but the mixture of NAD(P)H and phenazine methosulfate generates OH radicals, indicating that reduced phenazine methosulfate was involved in the OH radical generation. Probably, the generated OH radicals inactivated Na,K-ATPase residing in the epithelium of the lens, which eventually caused opacification of the lens. The present experiment system may be used for the elucidation of lens opacification (cataract) involved with reactive oxygen species.
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PMID:Reactive oxygen species involved in phenazine-methosulfate-induced rat lens opacification. An experimental model of cataract. 813 88

Eye infections due to Pseudomonas aeruginosa is an important cause of ocular morbidity. We presents the whole genomic comparative analysis of two P. aeruginosa VRFPA03 and VRFPA05 isolated from alkaline chemical injury mediated keratitis and post-cataract surgery endophthalmitis patients, respectively. The blaDIM-1 gene in VRFPA03 and the blaGes-9 gene in VRFPA05 were identified and reported for the first time from an ocular isolate. The current study revealed novel integrons In1107 and In1108, comprised of multidrug-resistant genes. Ocular virulence factors mainly mediated by exoenzymes T, Y, and U and exotoxin A, elastase B, and phenazine-specific methyltransferase. Genomic analysis uncovered multiple known and unknown factors involved in P. aeruginosa mediated ocular infection, which may lead to drug discovery and diagnostic markers to improve human vision care.
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PMID:Resistome and pathogenomics of multidrug resistant (MDR) Pseudomonas aeruginosa VRFPA03, VRFPA05 recovered from alkaline chemical keratitis and post-operative endophthalmitis patient. 2669 45