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Biomedical subjects

Victor Menezo

Publications and source records attributed to Victor Menezo.

7 recordsLinked to original sources
PubMed2006

Cytokine gene polymorphisms involved in chronicity and complications of anterior uveitis.

The aim of this study was to identify key cytokine polymorphisms associated with disease susceptibility, clinical phenotype, and outcome in patients with chronic anterior uveitis (CAU) as compared to those with recurrent self-limiting anterior uveitis (RAU). One hundred fifty seven British Caucasian patients with anterior uveitis were identified and divided into those where the inflammatory process lasted less than 3 months (RAU=118) and those where the inflammation persisted longer than 3 months (CAU=39). Patients with CAU were further sub-divided into idiopathic CAU, CAU associated with systemic disease, CAU with and without complications (posterior synechiae, posterior subcapsular lens opacity, raised intraocular pressure, cystoid macular oedema, and poor response to treatment). Sixty-six healthy controls were ethnically matched. TaqMan PCR amplification was used to genotype five single nucleotide polymorphisms in cytokine genes; IL-1RN+2018, IL-6-174, IL-10-1082, TNF-238, TNF-308 and these were correlated with clinical phenotype.

Adult↗
PubMed2006

Chemokine gene polymorphisms in idiopathic anterior uveitis.

OBJECTIVES: The aim of this study was to determine whether there are any associations between single nucleotide polymorphisms of the chemokine genes IL-8, MCP-1, their corresponding receptors CXCR1 and CCR2 and disease outcome in patients with acute idiopathic anterior uveitis. METHODS: 60 Caucasian patients with idiopathic acute recurrent anterior uveitis together with 120 healthy Caucasian control subjects were tested for the presence of 16 bi-allelic polymorphisms and HLA-B27 using polymerase chain reaction in association with sequence-specific primers with mismatches at the 3' end. The genetic data was then compared between patients and controls, and within the patient group itself for association with clinical disease outcome. RESULTS: As expected, the frequency of HLA-B27 was significantly higher in the patient group than the control group (63.33% versus 15.83%; Pearson's P<0.0001, Fisher's P<0.0001). In addition, the frequency of the T allele of MCP-1 63555 was found to be significantly higher in the control group when compared to the patient group (P=0.0160). CONCLUSION: This study describes an association between acute anterior uveitis and MCP-1 63555 polymorphisms where the T allele may be a protective marker against the disease.

Chemokines↗
PubMed2005

The development of complications in patients with chronic anterior uveitis.

PURPOSE: This study aimed to identify the factors determining the ocular complications and visual outcome in patients with chronic anterior uveitis. DESIGN: Retrospective, noncomparative case study. METHODS: Ninety-one eyes of 68 patients with anterior uveitis that lasted longer than 3 months were assessed. Patients were divided into idiopathic and nonidiopathic chronic anterior uveitis and Fuchs' heterochromic uveitis. Visual acuity and complications such as posterior synechiae, cataract formation, raised intraocular pressure (IOP), and posterior segment complications (i.e., cystoid macular edema and optic nerve involvement) were evaluated. Poor visual outcome measured by life-table analysis was considered when logMAR (log of the reciprocal of Snellen visual acuity) visual acuity was 0.3 or worse. RESULTS: No statistically significant differences in the visual outcome were found between the three groups of patients with chronic anterior uveitis. Posterior synechiae formation was, as expected, significantly increased in patients with chronic anterior uveitis compared with those with Fuchs' heterochromic uveitis. There was a trend for patients with nonidiopathic chronic anterior uveitis to have an increased risk of cystoid macular edema compared with those with idiopathic disease. There were no significant differences in visual outcome between any of the groups with time. CONCLUSIONS: The visual prognosis for patients with chronic anterior uveitis is generally good. Posterior segment complications appear to be more likely to occur if there is an underlying associated disease. However, the presence of complications does not seem to affect the visual outcome in patients with chronic anterior uveitis.

Adult↗
PubMed2005

Clinical outcome of chronic immunosuppression in patients with non-infectious uveitis.

AIM: To determine the visual outcome and corticosteroid dose requirement in patients with non-infectious uveitis affecting the posterior segment treated with corticosteroids and additional second-line immunosuppression. METHOD: A retrospective, non-comparative case series was carried out. Seventy-two patients (141 eyes) with uncontrolled non-infectious uveitis on systemic prednisolone were treated with at least one second-line immunosuppressive agent in addition to systemic prednisolone and followed for at least 3 months. Visual acuity (VA), clinical disease activity, corticosteroid-sparing effect, disease relapses requiring corticosteroid dose increase,and side-effects from second-line agents were evaluated. RESULTS: At the end of the follow-up period (mean: 55.5 months),70 eyes (49.6%) had VA of 6/9 or better. There was a reduction in the mean maintenance dose of prednisolone required before the introduction of the second-line agent (19 mg/day +/- 2 SE)when compared to the mean maintenance dose of prednisolone at the end of the data collection (9 mg/day +/- 1 SE; P <0.001). There was also a significant reduction in the number of disease relapses requiring an increase in prednisolone dose after starting the second-line agents as compared to the year before (P <0.02). CONCLUSION: In patients with uveitis affecting the posterior segment, the addition of all second-line immunosuppressive therapy was effective in allowing reduction of the dose of systemic prednisolone to 10 mg/day or less, in controlling intraocular inflammation, reducing the number of relapses and in maintaining vision. Because of their side-effects, immunosuppressive treatment should be individualized and monitored closely but its addition is beneficial in the short and longer term.

Adolescent↗
PubMed2005

TNF-857T, a genetic risk marker for acute anterior uveitis.

PURPOSE: To determine the association between 17 single nucleotide polymorphisms (SNPs) of tumor necrosis factor-alpha, lymphotoxin-alpha, and the TNF-receptors genes (TNF, LTA, and TNFRSF1A and -B) and idiopathic acute anterior uveitis (IAU) and to investigate their association with HLA-B27 and/or the development of visually significant complications. METHODS: Ninety-eight white patients in the United Kingdom were identified (by SL) from the uveitis clinics of Moorfields Eye Hospital (London, UK). Sequence-specific primers with 3' end mismatches were used to identify the presence of specific allelic variants by PCR amplification. RESULTS: There was a significant increase in the frequency of the TNF-857T allele in patients with IAU when compared with control subjects (15.3% vs. 7.3%, P = 0.0006). The frequency of haplotype 4, containing the T allele at nucleotide position -857, was also significantly increased in patients with IAU compared with control subjects (15.4% vs. 7.1%, P = 0.0003, OR 2.4, 95% confidence interval 1.4-4.0). In subgroup analysis, there were significant differences in the frequencies of the uncommon TNFRSF1A-201T and TNFRSF1A-1135T alleles between HLA-B27(+) patients with inflammation-related complications and those without complications (80.0% vs. 33.6%, P = 0.006; 80.0% vs. 36.6%, P = 0.01, respectively). CONCLUSIONS: A significant difference in the frequency of TNF-857T allele was found in patients with IAU. There was a trend toward the development of inflammation-related complications in HLA-B27(+) patients with IAU who were carriers of TNFRSF1A-201T or TNFRSF1A-1135T alleles. Genetic variations in these proinflammatory mediators and their receptors appear to influence the susceptibility and severity of the inflammatory response within the eyes of patients during the development of IAU.

Acute Disease↗
PubMedDate not supplied

The eye in systemic vasculitis.

The term 'vasculitis' includes a wide range of disorders characterised by inflammation of the wall of blood vessels, sometimes with necrosis, leading to ischaemia of the affected organ. The exact pathogenesis of most of these vasculitides is not fully understood and although the presence of circulating auto-antibodies seems to be a common feature among them, each vasculitis has its unique pathogenesis and a predilection for vessels of a defined size. Systemic vasculitis may be associated with ocular complications which include scleritis, keratitis, uveitis and optic neuropathy. These can precede the symptoms/signs of the systemic disease and therefore their recognition may lead to detection of the underlying disorder. The eye may also be affected by the treatment required to control the systemic disease.

Autoimmune Diseases↗