The Th17 pathway in the peripheral lung microenvironment interacts with expression of collagen V in the late state of experimental pulmonary fibrosis

Autor(es):Mostrar menos -

Fabro, Alexandre T. ^[1] ; da Silva, Pedro H. R. Q. ^[2] ; Zocolaro, William S. ^[2] ; de Almeida, Mozar S. ^[2] ; Rangel, Maristela P. ^[2] ; de Oliveira, Cristiano C. ^[1] ; Minatel, Igor O. ^[1] ; Prando, Erika d. C. ^[3] ; Rainho, Claudia A. ^[3] ; Teodoro, Walcy R. ^[2] ; Velosa, Ana P. P. ^[2] ; Saber, Alexandre M. A. ^[2] ; Parra-Cuentas, Edwin R. ^[2] ; Popper, Helmut H. ^[4] ; Capelozzi, Vera L. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Sao Paulo State Univ, Botucatu Med Sch, Pulm Pathol Res Grp, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Fac Med, Lab Histomorphometry & Lung Gen, BR-05508 Sao Paulo - Brazil

^[3] Univ Estadual Paulista, Sao Paulo State Univ, Biosci Inst, Dept Genet, Sao Paulo - Brazil

^[4] Graz Univ, Inst Pathol, A-8010 Graz - Austria

• Tipo de documento: Artigo Científico
• Fonte: Immunobiology; v. 220, n. 1, p. 124-135, JAN 2015.
• Citações Web of Science: 6

Resumo

Background: Myofibroblasts derived from fibroblasts in the pathogenesis of pulmonary fibrosis causes excessive and disordered deposition of matrix proteins, including collagen V, which can cause a Th17-mediated immune response and lead to apoptosis. However, whether the intrinsic ability of lung FBs to produce the matrix depends on their site-specific variations is not known. Aim: To investigate the link between Th17 and collagen V that maintains pulmonary remodeling in the peripheral lung microenvironment during the late stage of experimental pulmonary fibrosis. Methods: Young male mice including wild Balb/c mice (BALB, n = 10), wild C57 Black/6J mice (C57, n = 10) and IL-17 receptor A knockout mice (KO, n = 8), were sacrificed 21 days after treatment with bleomycin. Picrosirius red staining, immunohistochemistry for IL-17-related markers and ``in situ{''} detection of apoptosis, immunofluorescence for collagen types I and V, primary cell cultures from tissue lung explants for RT-PCR and electron microscopy were used. Results: The peripheral deposition of extracellular matrix components by myofibroblasts during the late stage is maintained in C57 mice compared with that in Balb mice and is not changed in the absence of IL-17 receptor A; however, the absence of IL-17 receptor A induces overexpression of type V collagen, amplifies the peripheral expression of IL-17 and IL-17-related cytokines and reduces peripheral lung fibroblast apoptosis. Conclusion: A positive feedback loop between the expression patterns of collagen V and IL-17 may coordinate the maintenance of peripheral collagen I in the absence of IL-17 receptor A in fibrosis-susceptible strains in a site-specific manner. (C) 2014 Elsevier GmbH. All rights reserved. (AU)

• Processo FAPESP: 09/50905-4 - Remodelamento parenquimatoso pulmonar em dois modelos experimentais de fibrose
• Beneficiário: Vera Luiza Capelozzi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/06065-9 - Remodelamento parenquimatoso pulmonar em dois modelos experimentais de fibrose
• Beneficiário: Pedro Henrique Ramos Quintino da Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 10/05266-0 - Remodelamento parenquimatoso pulmonar em dois modelos experimentais de fibrose
• Beneficiário: Mozar Suzigan de Almeida
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 10/05704-8 - Projeto: Remodelamento parenquimatoso pulmonar em dois modelos experimentais de fibrose. Sub-projeto 1: Avaliação histomorfométrica da imunoexpressão de citocinas teciduais
• Beneficiário: William Sanches Zocolaro
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica