Résumé
Malgré les progrès thérapeutiques récents, le choc septique conserve une mortalité trop élevée. Le système adrénergique est un modulateur clé du fonctionnement des organes et de l’homéostasie cardiovasculaire. Il pourrait être une nouvelle cible thérapeutique intéressante dans cette pathologie. La régulation β-adrénergique de la fonction immunitaire dans le sepsis est complexe et dépend du temps. Toutefois, l’activation β2 ainsi que le blocage β1 exercent un effet protecteur contre la réponse pro-inflammatoire, en modulant le profil de production de cytokines. Le blocage β1 améliore l’homéostasie cardiovasculaire chez les animaux septiques, en abaissant la consommation d’oxygène du myocarde sans altérer la perfusion des organes. Il pourrait également avoir des effets antiapoptotiques. Par conséquent, les bêtabloquants, comme ils le font dans l’insuffisance cardiaque non septique, pourraient participer à l’amélioration de la dysfonction cardiovasculaire au cours du sepsis.
Abstract
Despite recent therapeutic progress, sepsis is still responsible for unacceptably high mortality rates. The adrenergic system, a key modulator of organ function and cardiovascular homeostasis, may be an interesting new therapeutic target for septic shock. β-adrenergic regulation of the immune function in sepsis is complex and time-dependent. However, β2 activation as well as β1 blockade seem to downregulate the pro-inflammatory response by modulating the cytokine production profile. β1 blockade improves cardiovascular homeostasis in septic animals by lowering myocardial oxygen consumption without altering organ perfusion, and perhaps by restoring normal cardiovascular variability. β-blockers may also be of interest in the systemic catabolic response to sepsis, as they counteract epinephrine, which is known to promote hyperglycemia as well as lipid and protein catabolism. β1 blockade, and β2 activation improve sepsis-induced immune, cardiovascular, and coagulation dysfunctions. However, β2 blockade seems beneficial regarding metabolism. Enough evidence has been accumulated in the literature to propose β-adrenergic modulation, β1 blockade, and β2 activation in particular, as new promising therapeutic targets for septic dyshomeostasis, altering favourably immune, cardiovascular, metabolic, and coagulation systems.
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Aboab, J., de Montmollin, E., Mansart, A. et al. Modulation adrénergique et défaillance cardiaque au cours du sepsis: intérêt des bêtabloquants. Réanimation 21, 171–179 (2012). https://doi.org/10.1007/s13546-012-0455-z
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DOI: https://doi.org/10.1007/s13546-012-0455-z