Brazilian Journal of Anesthesiology
https://bjan-sba.org/article/doi/10.1590/S0034-70942012000500010
Brazilian Journal of Anesthesiology
Review Article

Opioides e o sistema imunológico: relevância clínica

Opioids and the immune system: clinical relevance

João Batista Santos Garcia; Mirlane Guimarães de Melo Cardoso; Maria Cristina Dos-Santos

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Resumo

JUSTIFICATIVA E OBJETIVO: O crescente uso de opioides para o tratamento da dor é uma realidade em vários países. Com o aumento do uso aparecem questionamentos menos usuais, como a influência dos opioides nas respostas imunológicas. O presente estudo tem como objetivo detalhar a resposta imunológica explorando as influências dos efeitos dos opioides sobre a resposta inflamatória em situações experimentais e clínicas, bem como sua importância para a prática diária. CONTEÚDO: Após revisão de artigos publicados em revistas indexadas no Medline, foi descrita a resposta imunológica de forma geral, especialmente em seu aspecto celular. Após essa abordagem, foram identificados os mecanismos de liberação dos opioides endógenos e a modulação da resposta imune aos opioides exógenos na dor aguda e crônica, sempre finalizando com as implicações clínicas e sua aplicabilidade na rotina de atendimento. CONCLUSÕES: Embora vários estudos apontem para um efeito imunodepressor dos opioides, a relevância clínica dessas observações continua incerta e serve apenas como um prerrequisito para que novas investigações nessa área sejam conduzidas. Recomendações definitivas para a aplicação de opioides, nas mais variadas situações da prática clínica em relação às consequências imunológicas desses fármacos, ainda não podem ser dadas até o momento presente.

Palavras-chave

ANALGÉSICOS, Opioides, DOR, SISTEMA IMUNOLÓGICO

Abstract

BACKGROUND AND OBJECTIVES: The increasing use of opioids for pain treatment is a reality in several countries and, therefore, unusual questions arise, such as the influence of opioids on immune responses. The present study aims to detail the immune response by exploring the influences of opiate effects on inflammatory response in experimental and clinical situations, as well as its importance in daily practice. CONTENT: After reviewing the articles published in journals indexed in Medline, we found that immune response has been generally described, especially regarding its cellular aspect. Following this approach, we identified the mechanisms of endogenous opioid release, modulation of immune response to exogenous opioids in acute and chronic pain, always ending with the clinical implications and applicability in routine care. CONCLUSIONS: Although several studies point to an immunosuppressive effect of opioids, the clinical relevance of these observations remains uncertain and only serves as a prerequisite for further investigations in this area. Definitive recommendations for the use of opioids in various situations of clinical practice regarding the immunological consequences of these drugs still cannot be provided until the present moment.

Keywords

Analgesics, Opioids, Immune System, Pain

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