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      Perfil de citocinas e tipificação de HLA em pacientes com polipose nasossinusal tolerantes e intolerantes a aspirina Translated title: Cytokines profile and HLA typing in tolerant and non-tolerant patients to aspirin with nasossinusal polyposis

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          Abstract

          A infiltração eosinofílica do pólipo nasossinusal (PNS) associado à intolerância aspirínica (IA) é característica relevante. Diversos mediadores participam da migração dos eosinófilos para os tecidos. A IA decorre do aumento da síntese de leucotrienos em indivíduos geneticamente susceptíveis. OBJETIVO: Analisar o perfil de citocinas e a tipificação de HLA-A, B e DR em pacientes com PNS tolerantes e intolerantes à aspirina. FORMA DE ESTUDO: Estudo de coorte transversal. MATERIAL E MÉTODO: selecionando-se 45 pacientes: 15 portadores de PNS eosinofílica tolerantes à aspirina (grupo TA); 15 de PNS eosinofílica associada à intolerância aspirínica, manifestada por broncoespasmo (grupo IA) e 15 sem PNS, que apresentavam desvio de septo nasal (grupo controle). O perfil de citocinas (IL-2; IL-4; IL-5; IL-6; IL-8; IL-10; IFN-gama e TNF-alfa) foi pesquisado nos fragmentos de pólipo nasal ou de mucosa de concha média (grupo controle) através da reação reversa da cadeia de polimerase (RT-PCR). A tipificação de HLA-A, B e DR foi realizada através de teste sorológico de microcitotoxicidade ou por amplificação de DNA pela reação em cadeia da polimerase (PCR). RESULTADOS: A expressão de RNAm para as interleucinas 4, 5, 6, 8, 10, IFN-gama e TNF-alfa foi semelhante nos três grupos. A expressão de RNAm para IL-2 associou-se com a IA. Os pacientes portadores dos antígenos A11, B49, DR15 e DR13 apresentaram uma maior probabilidade de desenvolver polipose nasossinusal não relacionada à IA, enquanto os portadores de DR17 apresentaram uma maior probabilidade de desenvolver polipose nasossinusal associada à intolerância aspirínica (Tríade Aspirínica). CONCLUSÃO: A polipose nasossinusal associada à intolerância aspirínica (Tríade Aspirínica) mostrou associação significante com HLA- DR17 e IL-2, sugerindo um perfil de citocinas TH1.

          Translated abstract

          The eosinophilic infiltration in the nasosinusal polyp associated with intolerance to aspirin is predominant feature. Several mediators play a role in the migration of the eosinophils to the tissues. The IA may be due to overexpression of leukotrienes in genetically susceptible subjects. AIM: The purpose of this study was to evaluate the cytokine pattern and HLA-A, B and DR typing in subjects with PNS tolerant and intolerants to aspirin. STUDY DESIGN: A transverse cohort study. MATERIAL AND METHOD: was conducted on 45 patients: 15 patients suffering from eosinophilic PNS and aspirin tolerance (group TA); 15 from eosinophilic PNS associated with aspirin intolerance, the latter manifested by bronchospasm (group IA), and 15 without PNS who had nasal septum deviation (control group). Cytokine pattern (IL-2; IL-4; IL-5; IL-6; IL-8; IL-10; IFN-gamma and TNF-alpha) was evaluated in samples from the nasal polyp or midlle turbinate mucosa (control group) of the patients using reverse transcription-polymerase chain reaction (RT-PCR). HLA-A, B and DR typing was performed using the serum microcytotoxicity test or by DNA amplification using polymerase chain reaction (PCR). RESULTS: mRNA expression for interleukines 4, 5, 6, 8, 10, IFN-gamma and TNF-alpha was similar in the three groups. mRNA expression for IL-2 was associated with IA. Patients with antigens A11, B49, DR15 and DR13 had a higher likelihood of developing PNS not-related to intolerance to Aspirin, whereas patients with DR17 had a higher likelihood of developing PNS associated with intolerance to Aspirin (Aspirin Triad). CONCLUSION: PNS associated with intolerance to Aspirin (Aspirin Triad) shows a significant association with HLA- DR17 and IL-2, suggesting a TH1-lymphocyte-activation pattern.

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          Most cited references25

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          Direct demonstration of delayed eosinophil apoptosis as a mechanism causing tissue eosinophilia.

          Nasal polyps, which often occur in association with allergic rhinitis and asthma, are characterized by a marked infiltration of eosinophils. Using a method for detecting eosinophils with DNA strand breaks, we found direct evidence for inhibition of eosinophil apoptosis in this model of tissue eosinophilia. By using Southern blot analysis linked to reverse transcription-PCR, we detected a mRNA signal specific for IL-5 in all nasal polyps. The identification of IL-5 as a major eosinophil survival factor was confirmed by ELISA measurements using tissue homogenates. Moreover, immunohistochemical analysis of the nasal polyp tissues demonstrated that IL-5 was localized in lymphocytes, mast cells, and eosinophils. Treatment of the eosinophil-infiltrated tissue with neutralizing anti-IL-5 mAb induced eosinophil apoptosis and decreased tissue eosinophilia. Therefore, IL-5 may represent an important cytokine responsible for the delay of the death process in eosinophils in nasal polyps. In addition, a previously suggested IL-4-dependent specific recruitment of eosinophils into the inflamed tissue could be excluded by our studies. Taken together, these findings suggest a novel mechanism by which eosinophils specifically accumulate in pathologic human tissues.
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            Concerning the nature of intolerance to aspirin.

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              Analysis of the distribution of HLA-A alleles in populations from five continents.

              The variation and frequency of HLA-A genotypes were established by PCR-SSOP typing in diverse geographically distributed populations: Brazilian, Colombian Kogui, Cuban, Mexican, Omani, Singapore Chinese, and South African Zulu. HLA-A allelic families with only one allele were identified for HLA-A*01, -A*23, -A*25, -A*31, -A*32, -A*36, -A*43, -A*69, -A*80; and with two alleles for HLA-A*03, -A*11, -A*26, -A*29, -A*33, -A*34, and -A*66. Greater variation was detected for HLA-A*02, -A*24, and -A*68 allele families. Colombian Kogui and Mexican Seris showed the least diversity with respect to HLA-A alleles, albeit with small numbers tested, with only four and five HLA-A alleles identified, respectively. It would appear by their presence in all populations studied, either rural or indigenous, that certain alleles are very important in pathogen peptide presentation.
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                Author and article information

                Journal
                rboto
                Revista Brasileira de Otorrinolaringologia
                Rev. Bras. Otorrinolaringol.
                ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial (São Paulo, SP, Brazil )
                0034-7299
                June 2003
                : 69
                : 3
                : 296-302
                Affiliations
                [02] orgnameUniversidade Federal de Minas Gerais orgdiv1Instituto de Ciências Biológicas orgdiv2Departamento de Parasitologia
                [03] orgnameUniversidade Federal de Minas Gerais orgdiv1Residente de Otorrinolaringologia
                [04] orgnameUniversidade Federal de Minas Gerais orgdiv1Faculdade de Medicina
                [01] orgnameUniversidade Federal de Minas Gerais orgdiv1Faculdade de Medicina orgdiv2Departamento de Otorrinolaringologia, Oftalmologia e Fonoaudiologia
                Article
                S0034-72992003000300001 S0034-7299(03)06900301
                688d9266-bb89-4f51-ad9a-7c58cae30c7c

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 13 May 2003
                : 24 February 2003
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 27, Pages: 7
                Product

                SciELO Brazil

                Categories
                Artigos Originais

                nasal polyps,antígenos HLA,citocinas,aspirina,pólipo nasal,HLA antigen,cytokines,aspirin

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