Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/45670
Title: Anti-Bronchospasmodic Effect of JME-173, a Novel Mexiletine Analog Endowed With Highly Attenuated Anesthetic Activity
Authors: Carvalho, Katharinne Ingrid Moraes
Coutinho, Diego de Sá
Joca, Humberto Cavalcante
Miranda, Artur Santos
Cruz, Jader dos Santos
Silva, Emerson Teixeira
Souza, Marcus Vinícius Nora
Faria, Robson Xavier
Silva, Patricia Machado Rodrigues e
Costa, Jorge Carlos Santos
Martins, Marco Aurélio
Affilliation: Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Inflamação. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Inflamação. Rio de Janeiro, RJ, Brasil.
Universidade Federal de Minas Gerais. Laboratório de Membranas Excitáveis e Biologia Cardiovascular. Belo Horizonte, MG, Brasil.
Universidade Federal de Minas Gerais. Laboratório de Membranas Excitáveis e Biologia Cardiovascular. Belo Horizonte, MG, Brasil.
Universidade Federal de Minas Gerais. Laboratório de Membranas Excitáveis e Biologia Cardiovascular. Belo Horizonte, MG, Brasil.
Fundação Oswaldo Cruz. Farmanguinhos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Farmanguinhos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Laboratório de Toxolpasmose e outras Protozoases. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Inflamação. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Farmanguinhos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Inflamação. Rio de Janeiro, RJ, Brasil.
Abstract: Local anesthetics (LAs), such as lidocaine and mexiletine, inhibit bronchoconstriction in asthmatics, but adverse effects limit their use for this specific clinical application. In this study, we describe the anti-spasmodic properties of the mexiletine analog 2-(2- aminopropoxy)-3,5-dimethyl, 4-Br-benzene (JME-173), which was synthesized and screened for inducing reduced activity on Na+ channels. The effectiveness of JME-173 was assessed using rat tracheal rings, a GH3 cell line and mouse cardiomyocytes to access changes in smooth muscle contraction, and Na+, and Ca++ionic currents, respectively. Bronchospasm and airway hyper-reactivity (AHR) were studied using whole-body barometric plethysmography in A/J mice. We observed that the potency of JME-173 was 653-fold lower than mexiletine in inhibiting Na+ currents, but 12-fold higher in inhibiting L-type Ca++ currents. JME-173 was also more potent than mexiletine in inhibiting tracheal contraction by carbachol, allergen, extracellular Ca++, or sodium orthovanadate provocations. The effect of JME-173 on carbachol-induced tracheal contraction remained unaltered under conditions of de-epithelized rings, b2-receptor blockade or adenylate cyclase inhibition. When orally administered, JME-173 and theophylline inhibited methacholine-induced bronchospasm at time points of 1 and 3 h post-treatment, while only JME-173 remained active for at least 6 h. In addition, JME-173 also inhibited AHR in a mouse model of lipopolysaccharide (LPS)-induced lung inflammation. Thus, the mexiletine analog JME-173 shows highly attenuated activity on Na+ channels and optimized anti-spasmodic properties, in a mechanism that is at least in part mediated by regulation of Ca++ inflow toward the cytosol. Thus, JME-173 is a promising alternative for the treatment of clinical conditions marked by lifethreatening bronchoconstriction.
Keywords: Local anesthetic
Airway hyper-reactivity
Asthma
Bronchodilator
Anti-inflammatory Frontiers
keywords: Anestésico local
Hiper-reatividade das vias aéreas
Asma
Broncodilatador
Fronteiras anti-inflamatórias
Issue Date: 2020
Publisher: Frontiers Media
Citation: CARVALHO, Katharine Ingrid Moraes et al. Anti-Bronchospasmodic Effect of JME-173, a Novel Mexiletine Analog Endowed With Highly Attenuated Anesthetic Activity. Frontiers in Pharmacology, v. 11, Article 1159, 12p, July 2020.
DOI: 10.3389/fphar.2020.01159
ISSN: 1663-9812
Copyright: open access
Appears in Collections:IOC - Artigos de Periódicos
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