Antoine Brézin

Publications (3)4.87 Total impact

• Article: Protective effect of pristane on experimental autoimmune uveitis.

  Jean-Baptiste Daudin, Dominique Monnet, Niloufar Kavian, Cécile Espy, Andrew Wang, Christiane Chéreau, Claire Goulvestre, Samy Omri, Antoine Brézin, Bernard Weill, Frédéric Batteux, Carole Nicco
  [show abstract] [hide abstract]
  ABSTRACT: This study evaluates the effects of pristane and phytol, two mineral oils with pro-oxidative effects, on the course of experimental autoimmune uveitis. C57BL6 mice were immunized with IRBP1-20 peptide emulsified in CFA and treated five days prior to immunization with phytol or with pristane or with PBS as control. Administration of pristane reduces the incidence and severity of IRBP-induced uveitis as demonstrated by the decrease in vasculitis and inflammatory foci in fundus and by a reduction in histological damages and leukocyte infiltration compared to untreated or phytol-treated mice. The protective effect observed is associated with a decreased activation of peripheral CD4+ and CD8+ T lymphocytes and a decrease in the intensity of the Th1 and Th17 autoimmune response to IRBP in pristane-treated mice compared to control mice, as evidenced by the decreased production of IFNγ and IL17 by IRBP-specific lymphocytes from lymph nodes draining the site of immunization and by the increased production of anti-IRBP IgG1 over IgG2a. In addition, HUVEC and ARPE-19 cells incubated with the sera of mice treated with pristane presented a reduced production of H(2)O(2). The benefit of lowering the systemic oxidative stress by pristane in the course of EAU was confirmed by injecting the antioxidant NAC in IRBP-immunized mice. As pristane, NAC decreased clinical and histological inflammation of the retina and preserved the integrity of the hemato-retinal barrier. Finally, the protective effect of pristane on the development of EAU suggests that some mineral oils may represent a new therapeutic strategy in human uveitis.
  Immunology letters 08/2011; 141(1):83-93. · 2.91 Impact Factor
• Article: Clinical manifestations of ocular toxoplasmosis.

  Emmanuelle Delair, Paul Latkany, A Gwendolyn Noble, Peter Rabiah, Rima McLeod, Antoine Brézin
  [show abstract] [hide abstract]
  ABSTRACT: Clinical manifestations of ocular toxoplasmosis are reviewed. Findings of congenital and acute acquired ocular toxoplasmosis include retinal scars, white-appearing lesions in the active phase often associated with vitritis. Complications can include fibrous bands, secondary serous or rhegmatogenous retinal detachments, optic neuritis and neuropathy, cataracts, increased intraocular pressure during active infection, and choroidal neovascular membranes. Recurrences in untreated congenital toxoplasmosis occur in teenage years. Manifestations at birth are less severe, and recurrences are fewer in those who were treated promptly early in the course of their disease in utero and in the first year of life. Severe retinal involvement is common at diagnosis of symptomatic congenital toxoplasmosis in the United States and Brazil. Acute acquired infections also may be complicated by toxoplasmic retinochoroiditis, with recurrences most common close to the time of acquisition. Suppressive treatment can reduce recurrent disease.
  Ocular immunology and inflammation 04/2011; 19(2):91-102. · 0.72 Impact Factor
• Article: Optical coherence tomography in the acute and chronic phases of Vogt-Koyanagi-Harada disease.

  Christine Parc, Jean-Marc Guenoun, Robin Dhote, Antoine Brézin
  [show abstract] [hide abstract]
  ABSTRACT: To assess the potential of optical coherence tomography (OCT) in the diagnosis and monitoring of serous retinal detachment in Vogt-Koyanagi-Harada (VKH) disease and to describe OCT characteristics of subretinal sequelae of the disease. Six patients in the acute phase of VKH disease with serous retinal detachment were followed in our department from July 2001 to December 2003 using slit-lamp biomicroscopy, OCT, and fluorescein angiography. OCT was effective in objectively quantifying the amount of serous retinal detachment present and then in following the resolution of subretinal fluid accumulation. Subretinal pigmented lesions on angiography corresponded with retinal pigment epithelium hypertrophy and fibrosis on OCT. A beneficial effect of treatment was observed within days, paralleling the improvement in visual acuity. Retinal pigment epithelium hypertrophy and fibrosis in the chronic phase of the disease were analyzed with OCT for the first time.
  Ocular Immunology and Inflammation 13(2-3):225-7. · 1.25 Impact Factor