A structural in silico analysis of the immunogenicity of L-asparaginase from Escherichia coli and Erwinia carotovora

Autor(es)

Herrera Belen, Lisandra ^[1] ; Beltran Lissabet, Jorge ^[1] ; Rangel-Yagui, Carlota de Oliveira ^[2] ; Effer, Brian ^[1] ; Monteiro, Gisele ^[2] ; Pessoa, Adalberto ^[2] ; Farias Avendano, Jorge G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ La Frontera, Dept Chem Engn, Fac Engn & Sci, Avda Francisco Salazar 01145, POB 54-D, Temuco - Chile

^[2] Univ Sao Paulo, Sch Pharmaceut Sci, Dept Biochem & Pharmaceut Technol, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOLOGICALS; v. 59, p. 47-55, MAY 2019.
• Citações Web of Science: 1

Resumo

Acute lymphoblastic leukemia (ALL) is a type of cancer with a high incidence in children. The enzyme L-asparaginase (ASNase) constitutes a key element in the treatment of this disease. Four formulations of ASNase from a bacterial source are currently available. However, these formulations are characterized by their high immunogenicity, resulting in the inactivation of the drug, as well as in the occurrence of hypersensitivity reactions in a large number of patients. In this work, we performed an immunoinformatic analysis in order to clarify structural aspects of the immunogenicity of the asparaginase from Escherichia coli and Erwinia carotovora. For this purpose, we performed the prediction of immunogenic and allergenic epitopes in the structure of asparaginases by using the relative frequency of immunogenic peptides for the eight alleles most frequently distributed worldwide. This study showed that there are no significant differences in the level of immunogenicity between the two enzymes, while asparaginase from E. coli presented a higher relative frequency of allergenic epitopes. These results are consistent with previously published reports. However, from a structural point of view, to the best of our knowledge, this is the first report describing the structural determinants that contribute to the hypersensitivity response to this treatment. (AU)

• Processo FAPESP: 16/22065-5 - Pegilação N-terminal de proteínas e purificação por sistemas aquosos bifásicos
• Beneficiário: Carlota de Oliveira Rangel Yagui
• Modalidade de apoio: Auxílio à Pesquisa - Regular