Avaliação de status redox, resposta inflamatória, telômeros e expressão gênica em anestesiologistas
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Data
2020-02-19
Autores
Souza, Kátina Meneghetti [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O presente estudo teve como objetivo avaliar o estresse oxidativo, a resposta inflamatória, a expressão de genes relacionados e o comprimento de telômeros em anestesiologistas. O estudo transversal foi realizado no Hospital das Clínicas, Faculdade de Medicina de Botucatu - UNESP, em 60 médicos, sendo 30 anestesiologistas expostos ocupacionalmente aos resíduos de gases anestésicos (RGA) isoflurano, sevoflurano e desflurano (média de 10 partes por milhão - ppm) e óxido nitroso (150 ppm) e 30 sem exposição, os quais foram pareados por idade, sexo e estilo de vida. Para avaliação do estresse oxidativo, foram avaliados os danos oxidativos sistêmicos no genoma, a peroxidação lipídica, os metabólitos de óxido nítrico, a defesa antioxidante e antioxidantes lipofílicos individuais, além de vitaminas do complexo B e homocisteína. A resposta inflamatória foi avaliada por interleucinas pró-inflamatórias (IL6, IL8 e IL17A), pela determinação de proteína C reativa de alta sensibilidade e de enzimas hepáticas. O comprimento dos telômeros e a expressão de genes relacionados ao reparo de danos oxidativos no DNA (hOGG1 e XRCC1), à defesa antioxidante (NRF2), à manutenção do genoma (TP53) e relacionados à inflamação (IL6, IL8 e IL17A) foram avaliados por reação em cadeia da polimerase quantitativa em tempo real. Não houve diferença significativa entre os grupos para os parâmetros avaliados, exceto para a expressão do gene IL8, que foi maior no grupo exposto (p = 0,04). A exposição ocupacional aos halogenados mais utilizados, juntamente ao óxido nitroso, não está associada com estresse oxidativo, micronutrientes, resposta inflamatória sistêmica e instabilidade genética, mas está associada à modulação molecular da inflamação (superexpressão do gene pró-inflamatório IL8) em anestesiologistas atuantes em hospital universitário, sugerindo que esse transcrito seja marcador de exposição ocupacional aos RGA. É prudente e necessário que haja redução da exposição ocupacional aos RGA no ambiente de trabalho e que todos os profissionais expostos sejam monitorados.
The current study aimed to evaluate oxidative stress, inflammatory response, the expression of related genes and telomere length in anesthesiologists. This crosssectional study was conducted at the Botucatu Medical School Hospital, São Paulo State University - UNESP, in 60 physicians, allocated in two groups, as follows: 30 anesthetists occupationally exposed to waste anesthetic gases (WAG) - isoflurane, sevoflurane, desflurane (average of 10 parts per million - ppm), and nitrous oxide (150 ppm), and 30 physicians exposed-free, who were matched by age, sex and lifestyle. Oxidative stress was analyzed by systemic oxidative DNA damage, lipid peroxidation, nitric oxide metabolites, antioxidant defense and individual lipophilic antioxidants, and complex B vitamins and homocysteine. The inflammatory response was evaluated by pro-inflammatory interleukins (IL6, IL8 and IL17A), Creactive protein, and liver enzymes. Telomere length and the expression of genes related to repair of oxidative DNA damage (hOGG1 and XRCC1), antioxidant defense (NRF2), genome maintenance (TP53) and inflammation (IL6, IL8 and IL17A) were evaluated by real-time quantitative polymerase chain reaction. There was no significant difference between groups for the evaluated parameters, except for IL8 gene expression, which was higher in the exposed group (p = 0.04). Occupational exposure to commonly used halogenated, along with nitrous oxide, is not associated with oxidative stress, micronutrients, systemic inflammatory response and genetic instability, but is associated with molecular modulation of inflammation (IL8 proinflammatory gene overexpression) in anesthesiologists working in a university hospital, suggesting that this transcript is a biomarker of ocuppational exposure to WAG. It is prudent and necessary to reduce WAG occupational exposure in the workplace and to monitor all exposed professionals.
The current study aimed to evaluate oxidative stress, inflammatory response, the expression of related genes and telomere length in anesthesiologists. This crosssectional study was conducted at the Botucatu Medical School Hospital, São Paulo State University - UNESP, in 60 physicians, allocated in two groups, as follows: 30 anesthetists occupationally exposed to waste anesthetic gases (WAG) - isoflurane, sevoflurane, desflurane (average of 10 parts per million - ppm), and nitrous oxide (150 ppm), and 30 physicians exposed-free, who were matched by age, sex and lifestyle. Oxidative stress was analyzed by systemic oxidative DNA damage, lipid peroxidation, nitric oxide metabolites, antioxidant defense and individual lipophilic antioxidants, and complex B vitamins and homocysteine. The inflammatory response was evaluated by pro-inflammatory interleukins (IL6, IL8 and IL17A), Creactive protein, and liver enzymes. Telomere length and the expression of genes related to repair of oxidative DNA damage (hOGG1 and XRCC1), antioxidant defense (NRF2), genome maintenance (TP53) and inflammation (IL6, IL8 and IL17A) were evaluated by real-time quantitative polymerase chain reaction. There was no significant difference between groups for the evaluated parameters, except for IL8 gene expression, which was higher in the exposed group (p = 0.04). Occupational exposure to commonly used halogenated, along with nitrous oxide, is not associated with oxidative stress, micronutrients, systemic inflammatory response and genetic instability, but is associated with molecular modulation of inflammation (IL8 proinflammatory gene overexpression) in anesthesiologists working in a university hospital, suggesting that this transcript is a biomarker of ocuppational exposure to WAG. It is prudent and necessary to reduce WAG occupational exposure in the workplace and to monitor all exposed professionals.
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Palavras-chave
Exposição ocupacional, Anestésicos inalatórios, Estresse oxidativo, Inflamação, Instabilidade genética, Expressão gênica, Occupational exposure, Inhalation anesthetics, Oxidative stress, Inflammation, Gene expression