Prevention Of Hypertension Abrogates Early Inflammatory Events In The Retina Of Diabetic Hypertensive Rats.

dc.creatorSilva, Kamila C
dc.creatorPinto, Camila C
dc.creatorBiswas, Subrata K
dc.creatorSouza, Denise S
dc.creatorde Faria, José B Lopes
dc.creatorde Faria, Jacqueline M Lopes
dc.date2007-Jul
dc.date2015-11-27T13:10:05Z
dc.date2015-11-27T13:10:05Z
dc.date.accessioned2018-03-29T01:04:47Z
dc.date.available2018-03-29T01:04:47Z
dc.identifierExperimental Eye Research. v. 85, n. 1, p. 123-9, 2007-Jul.
dc.identifier0014-4835
dc.identifier10.1016/j.exer.2007.03.008
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/17493613
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/197282
dc.identifier17493613
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1297515
dc.descriptionHypertension is an important risk factor associated with development and progression of diabetic retinopathy (DR). The mechanisms by which hypertension increases the risk for DR are poorly understood. As the inflammatory mechanisms play a pivotal role in the pathogenesis of DR, in the present study, we investigated the effects of diabetes, hypertension, and combination of diabetes and hypertension on early inflammatory phenomena in the retina, and the effects of blood pressure control on retinal inflammation. Four-week-old spontaneously hypertensive rats (SHR) and their normotensive counterpart Wistar Kyoto (WKY) rats were rendered diabetic by intravenous injection of streptozotocin. Diabetic SHR rats were randomized to receive no antihypertensive drug (Sd), an antihypertensive drug that acts on renin-angiotensin system (losartan, Sd+Los), or antihypertensive drug that do not affect renin-angiotensin system (triple therapy, Sd+Tri). After 20 days, rats were sacrificed and the retinas were collected. The number of immunohistochemically detected ED1/microglial positive cells and the expression of ICAM-1 in the retina were significantly higher in diabetic SHR than in control SHR (p=0.003). The NF-kappaB p65 levels were higher in SHR compared with WKY groups (p=0.001) and its increment in diabetic SHR was not significant. These abnormalities in diabetic SHR rats were completely prevented by both types of antihypertensive drugs. The concomitance of diabetes and hypertension leads to exuberant inflammatory response in the retina, and the prevention of hypertension abrogates these abnormalities. It is suggested that the inflammatory events may be involved in the mechanism by which hypertension exacerbates retinopathy in patients with diabetes.
dc.description85
dc.description123-9
dc.languageeng
dc.relationExperimental Eye Research
dc.relationExp. Eye Res.
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAdministration, Oral
dc.subjectAnimals
dc.subjectAntihypertensive Agents
dc.subjectBlood Pressure
dc.subjectDiabetic Retinopathy
dc.subjectDrug Combinations
dc.subjectEye Proteins
dc.subjectHydralazine
dc.subjectHydrochlorothiazide
dc.subjectHypertension
dc.subjectImmunohistochemistry
dc.subjectIntercellular Adhesion Molecule-1
dc.subjectLosartan
dc.subjectMale
dc.subjectMicroglia
dc.subjectRats
dc.subjectRats, Inbred Shr
dc.subjectRats, Inbred Wky
dc.subjectReserpine
dc.subjectRetina
dc.subjectTranscription Factor Rela
dc.titlePrevention Of Hypertension Abrogates Early Inflammatory Events In The Retina Of Diabetic Hypertensive Rats.
dc.typeArtículos de revistas


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