Anti-Bronchospasmodic Effect of JME-173, a Novel Mexiletine Analog Endowed With Highly Attenuated Anesthetic Activity

dc.creatorCarvalho, Katharinne Ingrid Moraes
dc.creatorCoutinho, Diego de Sá
dc.creatorJoca, Humberto Cavalcante
dc.creatorMiranda, Artur Santos
dc.creatorCruz, Jader dos Santos
dc.creatorSilva, Emerson Teixeira
dc.creatorSouza, Marcus Vinícius Nora
dc.creatorFaria, Robson Xavier
dc.creatorSilva, Patricia Machado Rodrigues e
dc.creatorCosta, Jorge Carlos Santos
dc.creatorMartins, Marco Aurélio
dc.date2021-01-13T18:29:21Z
dc.date2021-01-13T18:29:21Z
dc.date2020
dc.date.accessioned2023-09-26T20:42:37Z
dc.date.available2023-09-26T20:42:37Z
dc.identifierCARVALHO, 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, p. 1-12, July 2020.
dc.identifier1663-9812
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/45670
dc.identifier10.3389/fphar.2020.01159
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8862452
dc.descriptionLocal 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.
dc.formatapplication/pdf
dc.languageeng
dc.publisherFrontiers Media
dc.rightsopen access
dc.subjectAnestésico local
dc.subjectHiper-reatividade das vias aéreas
dc.subjectAsma
dc.subjectBroncodilatador
dc.subjectFronteiras anti-inflamatórias
dc.subjectLocal anesthetic
dc.subjectAirway hyper-reactivity
dc.subjectAsthma
dc.subjectBronchodilator
dc.subjectAnti-inflammatory Frontiers
dc.titleAnti-Bronchospasmodic Effect of JME-173, a Novel Mexiletine Analog Endowed With Highly Attenuated Anesthetic Activity
dc.typeArticle


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