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BIBTEX RIS

Plant Proteinase Inhibitor BbCI Modulates Lung Inflammatory Responses and Mechanic and Remodeling Alterations Induced by Elastase in Mice

2017; Hindawi Publishing Corporation; Volume: 2017; Linguagem: Inglês

10.1155/2017/8287125

ISSN

2314-6141

Autores

Rafael Almeida-Reis, Osmar A. Theodoro-Junior, Bruno Tadeu Martins Oliveira, Leandro V. Oliva, Alessandra Choqueta de Toledo, Camila Ramalho Bonturi, Marlon Vilela de Brito, Fernanda Degobbi Tenório Quirino dos Santos Lopes, Carla M. Prado, Ariana Corrêa Florencio, Mílton A. Martins, Caroline A. Owen, Edna A. Leick, Maria Luíza Vilela Oliva, Iolanda de Fátima Lopes Calvo Tibério,

Tópico(s)

Asthma and respiratory diseases

Resumo

Background. Proteinases play a key role in emphysema. Bauhinia bauhinioides cruzipain inhibitor (BbCI) is a serine-cysteine proteinase inhibitor. We evaluated BbCI treatment in elastase-induced pulmonary alterations. Methods. C57BL / 6 mice received intratracheal elastase (ELA group) or saline (SAL group). One group of mice was treated with BbCI (days 1, 15, and 21 after elastase instillation, ELABC group). Controls received saline and BbCI (SALBC group). After 28 days, we evaluated respiratory mechanics, exhaled nitric oxide, and bronchoalveolar lavage fluid. In lung tissue we measured airspace enlargement, quantified neutrophils, TNF α -, MMP-9-, MMP-12-, TIMP-1-, iNOS-, and eNOS-positive cells, 8-iso-PGF2 α , collagen, and elastic fibers in alveolar septa and airways. MUC-5-positive cells were quantified only in airways. Results. BbCI reduced elastase-induced changes in pulmonary mechanics, airspace enlargement and elastase-induced increases in total cells, and neutrophils in BALF. BbCI reduced macrophages and neutrophils positive cells in alveolar septa and neutrophils and TNF α -positive cells in airways. BbCI attenuated elastic and collagen fibers, MMP-9- and MMP-12-positive cells, and isoprostane and iNOS-positive cells in alveolar septa and airways. BbCI reduced MUC5ac-positive cells in airways. Conclusions. BbCI improved lung mechanics and reduced lung inflammation and airspace enlargement and increased oxidative stress levels induced by elastase. BbCI may have therapeutic potential in chronic obstructive pulmonary disease.

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