Novel Organic Salts Based on Mefloquine: Synthesis, Solubility, Permeability, and In Vitro Activity against Mycobacterium tuberculosis

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Silva, D (Author) Other; Lopes, MVC (Author) Other; Petrovski, Z (Author) Other; Santos, MM (Author) FCUP; Santos, JP (Author) Other; Yamada Ogatta, SF (Author) Other; Bispo, MLF (Author) Other; de Souza, MVN (Author) Other; Duarte, ARC (Author) Other; Lourenco, MCS (Author) Other; Goncalves, RSB (Author) Other; Branco, LC (Author) Other

Journal

Title: Molecules

Vol. 846

Final page: 5167

ISSN: 1420-3049

Publisher: MDPI

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-00X-417

DOI: 10.3390/molecules27165167

Abstract (EN): The development of novel pharmaceutical tools to efficiently tackle tuberculosis is the order of the day due to the rapid development of resistant strains of Mycobacterium tuberculosis. Herein, we report novel potential formulations of a repurposed drug, the antimalarial mefloquine (MFL), which was combined with organic anions as chemical adjuvants. Eight mefloquine organic salts were obtained by ion metathesis reaction between mefloquine hydrochloride ([MFLH][Cl]) and several organic acid sodium salts in high yields. One of the salts, mefloquine mesylate ([MFLH][MsO]), presented increased water solubility in comparison with [MFLH][Cl]. Moreover, all salts with the exception of mefloquine docusate ([MFLH][AOT]) showed improved permeability and diffusion through synthetic membranes. Finally, in vitro activity studies against Mycobacterium tuberculosis revealed that these ionic formulations exhibited up to 1.5-times lower MIC values when compared with [MFLH][Cl], particularly mefloquine camphorsulfonates ([MFLH][(1R)-CSA], [MFLH][(1S)-CSA]) and mefloquine HEPES ([MFLH][HEPES]).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15