Avaliação da imunoglobulina E (IgE) anti - leishmania como marcador de prognóstico na leishmaniose tegumentar americana
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2015-07-02
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Universidade Federal de Goiás
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Leishmaniases comprise a disease group with a great epidemiological and clinical diversity. The detection of IgE can be an important tool for prognosis of American Tegumentary Leishmaniasis (LTA). The objective of this present work was to assess if the immunoglobulin E (IgE), anti - Leishmania can be used as biomarkers for prognosis in LTA. The standardization of an enzyme-linked immunosorbent assay (ELISA) was carried out applying antigenic extract of L. (V.) braziliensis to detect IgE specific for leishmania in LTA patients’ plasmas. It was determined that the dilution which differed positive from negative samples was 1/20 for plasma and 1/100 for peroxidase labeled anti-IgE antibody. Forty LTA patients were assisted in the laboratory of endemic diseases at AnuarAuad Hospital (HDT/GO), Goiânia - GO, between 2009 and 2012. Twenty-seven of those patients showed localized cutaneous leishmaniasis (LCL) and 1 showed mucosal leishmaniasis (LM). Twenty-seven of those patients were male and thirteen were female. The LCL patients’ ages varied between 18 to 65 years and LM patients’ ages varied from 25 to 61 years. The LCL patients showed 1 to 20 lesions whose sizes varied from 0,2 to 7 cm and the duration of the lesion diagnostic varied from 0,5 to 4 months, and in LM patients it varied from 0,5 to 120 months. The positive result of the AH, IDRM, IF and Elisa lab tests for IgG was 80%, 67,5%, 42,5% and 87,5% respectively. A cross - reactivity analysis was performed using samples of patients with blastomycosis, malaria, visceral leishmaniasis (LV), Chagas disease and toxoplasmosis and only one sample from an LV patient (10%) was positive, the test was 98,3% precise. The specific IgE detection occurred in 40% of the LTA patients. No correlation between the quantity of IgE and IDRM results was found. No correlation between the index of IgE and the number of lesions in LCL patients was observed. No association between clinical cure or no cure and the index of IgE reactivity was detected. A higher number of patients’ samples are necessary to obtain more accurate results.
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LEÃO, N. M. L. Avaliação da imunoglobulina E (IgE) anti - leishmania como marcador de prognóstico na leishmaniose tegumentar americana. 2015. 47 f. Dissertação (Mestrado em Medicina Tropical e Saúde Publica) - Universidade Federal de Goiás,Goiânia, 2015.