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Efeitos dos betas-bloqueadores na sepse em camundongos

Authors: Silva, Katiussia Pinho da;

Efeitos dos betas-bloqueadores na sepse em camundongos

Abstract

Introdução: Sepse é uma das mais antigas síndromes reconhecidas na história da medicina. Atualmente, é descrita como uma resposta inflamatória sistêmica desregulada do hospedeiro à infecção que ocasiona diversos comprometimentos orgânicos. Neste sentindo, a disfunção cardíaca é uma das características comum entre os pacientes sépticos e contribui para a taxa de mortalidade associada à sepse. Dados recentes mostraram que a hiporesponsividade cardíaca na sepse está relacionada à internalização dos β-adrenoceptores (β-ARs) (Dal Secco, D., et al., 2017). Interessantemente, tem sido apontado o benefício hemodinâmico com a utilização do esmolol (β-bloqueador) na sepse. É sabido que os β-bloqueadores apresentam um perfil farmacológico distinto entre eles, especialmente no que diz respeito à atividade simpatomimética intrínseca. Ou seja, alguns β-bloqueadores agem como agonistas parciais nos β-ARs e portanto, promovem certo grau de inotropismo positivo. Considerando a associação da disfunção cardíaca na sepse com a internalização dos β-ARs, esta tese tem como racional farmacológico que os β-bloqueadores com atividade simpatomimética intrínseca (eficácias) variando de “zero” (propranolol, bisoprolol) a “moderado” (carvedilol

Introduction: Sepsis is one of the oldest known syndromes in the history of medicine. Nowadays, it is described as a dysregulated systemic inflammatory response of the host to infection, which leads to several organical injuries. Thus, cardiac dysfunction is one of the common characteristics in septical patients and contributes to the mortality rate associated to sepsis. Recent data have shown that cardiac hyporesponsiveness in sepsis is related to β-adrenoceptors (β-ARs) internalization (Dal Secco, D., et al., 2017). Interestingly, beneficial in hemodynamics has been showed in sepsis with the use of esmolol (β-blocker). It is known that β-blockers present a distinct pharmacological profile among them, specially regarding its intrinsic sympathomimetic activity. That is, some β-blockers acts as partial agonists in the β-ARs and therefore, promote some degree of positive inotropism. Considering the association between cardiac dysfunction in sepsis and the internalization of β-ARs, this thesis presents as pharmacological basis that β-blockers presenting intrinsic sympathomimetic activity (efficacy) ranging from “zero” (propranolol, bisoprolol) to “moderate” (carvedilol

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Pós-graduação em Farmacologia e Biotecnologia - IBB

CAPES: 001

Country
Brazil
Keywords

Disfunção cardíaca, Efficacy, β-bloqueadores, Sepsis, Cardiac dysfunction, β-blockers, Sepse, Eficácia

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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