Increased frequency of anti-retina antibodies in asymptomatic patients with chronic t. gondii infection

Authors

  • Sylvia Regina Temer Cursino Instituto de Medicina Tropical de São Paulo; Protozoology Department
  • Thaís Boccia da Costa Universidade de São Paulo; Faculdade de Medicina; Pathology Department
  • Joyce Hisae Yamamoto Universidade de São Paulo; Faculdade de Medicina; Pathology Department
  • Luciana Regina Meireles Universidade de São Paulo; Faculdade de Medicina; Pathology Department
  • Maria Antonieta Longo Galvão Silva Santa Casa de Misericórdia de São Paulo; Faculdade de Ciências Médicas; Pathology Department
  • Heitor Franco de Andrade Junior Universidade de São Paulo; Faculdade de Medicina; Pathology Department

DOI:

https://doi.org/10.1590/S1807-59322010001000018

Keywords:

Retina, Uveitis, Toxoplasmosis, Autoantibodies, ELISA

Abstract

PURPOSE: To search for anti-retina antibodies that serve as markers for eye disease in uveitis. MATERIALS AND METHODS: Stored sera from patients with uveitis, ocular toxoplasmosis (n = 30) and non-infectious, immune-mediated uveitis (n = 50) and from asymptomatic individuals who were positive (n = 250) and negative (n = 250) for anti-Toxoplasma antibodies were tested. Serum anti-retina IgG was detected by an optimized ELISA using a solid-phase whole human retina extract, bovine S-antigen or interphotoreceptor retinoid-binding protein. RESULTS: Uveitis patients showed a higher mean reactivity to whole human retina extract, interphotoreceptor retinoid-binding protein and S-antigen in comparison to the asymptomatic population. These findings were independent of the uveitis origin and allowed the determination of the lower anti-retina antibody cut-off for the three antigens. Asymptomatic anti-Toxoplasma serum-positive individuals showed a higher frequency of antihuman whole retina extract antibodies in comparison to asymptomatic anti-Toxoplasma serum-negative patients. The bovine S-antigen and interphotoreceptor retinoid-binding protein ELISAs also showed a higher mean reactivity in the uveitis groups compared to the asymptomatic group, but the observed reactivities were lower and overlapped without discrimination. CONCLUSION: We detected higher levels of anti-retina antibodies in uveitis patients and in a small fraction of asymptomatic patients with chronic toxoplasmosis. The presence of anti-retina antibodies in sera might be a marker of eye disease in asymptomatic patients, especially when whole human retina extract is used in a solid-phase ELISA.

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Published

2010-01-01

Issue

Section

Clinical Sciences

How to Cite

Cursino, S. R. T., Costa, T. B. da, Yamamoto, J. H., Meireles, L. R., Silva, M. A. L. G., & Andrade Junior, H. F. de. (2010). Increased frequency of anti-retina antibodies in asymptomatic patients with chronic t. gondii infection . Clinics, 65(10), 1027-1032. https://doi.org/10.1590/S1807-59322010001000018