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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2009.tde-23102009-090556
Document
Author
Full name
Antonio Carlos Pedroso
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2009
Supervisor
Committee
Ferreira, Antônio José Piantino (President)
Dagli, Maria Lucia Zaidan
Silva, Luiziana Ferreira da
Sinhorini, Idercio Luiz
Yano, Tomomasa
Title in Portuguese
Modulação da resposta imune em aves imunizadas com vacinas aviárias associadas ao b-glucano.
Keywords in Portuguese
b-Glucano
Galinhas
Imunidade
Microbiologia
Resposta imune
Vacinas
Abstract in Portuguese
Os b-glucanos são formados por polissacarídeos estruturais da parede celular de leveduras (Saccharomyces cerevisiae), alguns cereais em grãos e fungos. Os b-glucanos apresentam a molécula de glicose ligada ao carbono nas posições b-1,3 e pode apresentar cadeias laterais com o resíduo de glicose ligado nas posições b-1,6. O b-glucano tem sua ação benéfica como antiinflamatório, antitumoral, hipocolesterolêmico e hipoglicêmico. A inocuidade do b-glucano solubilizado nesse trabalho foi demonstrada in vitro, em cultivo celular de fibroblastos de embriões de galinhas SPF, e confirmado in vivo após a injeção no músculo peitoral de frangos. O b-glucano é um modulador biológico devido sua capacidade de em aumentar a resposta imune inata, aumentando os mecanismos inespecíficos de defesa dos animais. O b-glucano solúvel na dose de 240 mg/ave, associado ao diluente da vacina de Marek, apresentou efeito imunomodulador na resposta imune humoral. Os níveis de IgG no plasma foram detectados pela técnica de ELISA, e a resposta imune celular foi avaliada pela detecção de IFNg-, IL-2 e IL-6 em frangos vacinados com vacina recombinante e viva contra doença de Gumboro. O b-glucano solúvel nesse experimento demonstrou ser um potente imunoadjuvante após aumentar a resposta imune humoral e celular para os antígenos da doença infecciosa da Bursa, quando associado em vacinas recombinantes e vivas.
Title in English
Immune response modulation in chicken immunized with vaccines associated to b-Glucan.
Keywords in English
b-Glucan
Chickens
Immune response
Immunity
Microbiology
Vaccines
Abstract in English
The b-glucans are structural polysaccharides from yeast cell wall (Saccharomyces cerevisiae), some cereal grains and fungi. The b-glucans have a glucose molecule carbon linked in sites b-1,3 and they have side chains of glucose residue in sites b-1,6. The b-glucans have a helpful effect as anti-inflammatory, antitumoral, hypoglycemic and hypocholesterolemic activity .The safety of b-glucan water-soluble obtained in this work was demonstrated in vitro, using specific-pathogen-free (SPF) cell culture chicken embryo fibroblast and it was confirmed in vivo after injection in chicken pectoral muscle. The b-glucan is a biological modulator due to its ability to increase the innate immune response. The soluble b-glucan in 240 mg/bird dose, associated to Marek's disease vaccine diluents showed immunomodulatory effect in humoral immune response. The IgG plasma levels were detected by ELISA method, and the cellular immune response was evaluated by detection IFN-g, IL-2 and IL-6 in vaccinated chickens with recombinant and live vaccines against Gumboro's disease using Real-Time PCR technique. The soluble b-glucan used in this trial demonstrated a powerful immune-adjuvant effect enhancing the cellular and humoral immune response against Bursal disease, when associated to recombinant vaccine and live vaccines.
 
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Publishing Date
2009-12-04
 
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