RESPOSTA BIOLÓGICA DO PARÊNQUIMA PULMONAR AO ESTÍMULO FÍSICO DURANTE A VENTILAÇÃO MECÂNICA

Autores

  • Frank Josué Costa do Nascimento
  • Luis Afonso Ramos Leite

DOI:

https://doi.org/10.51161/rems/657

Palavras-chave:

Mecanotransdução celular, lesão pulmonar induzida por ventilação mecânica, terapia intensiva, inflamação

Resumo

Introdução: A ventilação mecânica, apesar dos seus objetivos terapêuticos, é relacionada à ocorrência de doenças pulmonares como, por exemplo, a lesão induzida por ventilação mecânica. Os mecanismos moleculares que podem desencadear uma resposta inflamatória, conhecida como biotrauma, e reparo de lesão são escopo de estudo de pesquisas recentes. Objetivo: Por meio deste estudo, visa-se destacar os principais processos bioquímicos para desencadear a resposta inflamatória ao estímulo físico da ventilação mecânica. Material e métodos: Foram pesquisados artigos com os termos-chave “mecanotransdução” e “ventilação mecânica” nas bases de dados Scielo, Pubmed, Medline e Lilacs, nos idiomas português e inglês, entre os anos de 2015 a 2020. Resultados: O TGF-β produzido por células epiteliais alveolares, mastócitos, fibroblastos da matriz extracelular e células-tronco alveolares em resposta ao alto estiramento cíclico leva ao processo de Endo-MT das células endoteliais, à transformação dos fibroblastos, à liberação de mediadores celulares pró-fibróticos e a liberação complemetar de TGF-β armazenado na matriz extracelular. Por meio do estiramento mecânico, a interrupção da homeostase do retículo endoplasmático (RE) resulta em uma condição conhecida como estresse do RE que leva à interrupção da homeostase celular, apoptose e inflamação. Alterações da estrutura da membrana nuclear decorrente da ventilação mecânica alteram a rigidez dessa membrana das células epiteliais alveolares. Há aumento da compreensão da emenda MYLK na regulação da integridade vascular pulmonar durante a inflamação pulmonar aguda e estresse mecânico excessivo. Canais iônicos mecanossensíveis no pulmão também respondem às forças de estiramento por meio de maior permeabilidade da membrana celular e presença crescente de citocinas inflamatórias. Conclusão: As reações moleculares em reposta aos estímulos ventilatórios lesivos nos trazem um novo olhar para a lesão induzida por ventilação mecânica (LPIV), com o foco em medidas terapêuticas que possam prevenir e tratar a partir da ação nas reações moleculares provenientes de atividades mecânicas.

Publicado

2021-02-01

Como Citar

Nascimento, F. J. C. do, & Leite, L. A. R. (2021). RESPOSTA BIOLÓGICA DO PARÊNQUIMA PULMONAR AO ESTÍMULO FÍSICO DURANTE A VENTILAÇÃO MECÂNICA. Revista Multidisciplinar Em Saúde, 2(1), 10. https://doi.org/10.51161/rems/657

Edição

Seção

Anais do Congresso Brasileiro de Bioquímica Humana On-line

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Deprecated: Function get_magic_quotes_runtime() is deprecated in /home/editoraime/public_html/revistas/lib/pkp/lib/vendor/adodb/adodb-php/adodb.inc.php on line 2067
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Dispatcher.dispatch(Object:Request) % line  281, file: PKPApplication.inc.php
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