Deciphering the possible role of MmpL7 efflux pump in SQ109 resistance in Mycobacterium tuberculosis.
Mycobacterium tuberculosis
/ drug effects
Microbial Sensitivity Tests
Humans
Antitubercular Agents
/ pharmacology
Membrane Transport Proteins
/ genetics
Bacterial Proteins
/ genetics
Tuberculosis, Multidrug-Resistant
/ microbiology
Drug Resistance, Multiple, Bacterial
/ genetics
Adamantane
/ pharmacology
Mutation
Mycobacterium smegmatis
/ genetics
Ethylenediamines
Mycobacterium tuberculosis
MmpL7
SQ109
Susceptibility
Journal
Annals of clinical microbiology and antimicrobials
ISSN: 1476-0711
Titre abrégé: Ann Clin Microbiol Antimicrob
Pays: England
ID NLM: 101152152
Informations de publication
Date de publication:
28 Sep 2024
28 Sep 2024
Historique:
received:
27
03
2024
accepted:
20
09
2024
medline:
29
9
2024
pubmed:
29
9
2024
entrez:
28
9
2024
Statut:
epublish
Résumé
SQ109 is a promising candidate drug for the treatment of patients with drug-resistant tuberculosis (DR-TB). The purpose of this study was to investigate the activity of SQ109 against clinical isolates of Mycobacterium tuberculosis (MTB) from patients with multidrug-resistant TB (MDR-TB) and pre-extensively drug-resistant TB (pre-XDR-TB), and to explore new drug-resistant mechanisms of SQ109. We evaluated the in vitro activity of SQ109 against clinical isolates from patients with MDR-TB and pre-XDR-TB using minimal inhibitory concentration (MIC) assay. The drug-resistant gene, mmpL3 of SQ109-resistant strains was sequenced, and a quantitative real-time PCR assay was used to analyze 28 efflux pump genes in SQ109-resistant strains without mmpL3 mutations. The role of candidate efflux pumps mmpL5 and mmpL7 on the MIC of SQ109 was evaluated using recombinantly cloned MmpL5 and MmpL7 expressed in Mycobacterium smegmatis. The MIC Our data demonstrated that SQ109 exhibited excellent levels of in vitro activity against MTB. MmpL7 may be a potential gene for MTB resistance to SQ109, providing a useful target for detecting SQ109 resistance in MTB.
Sections du résumé
BACKGROUND
BACKGROUND
SQ109 is a promising candidate drug for the treatment of patients with drug-resistant tuberculosis (DR-TB). The purpose of this study was to investigate the activity of SQ109 against clinical isolates of Mycobacterium tuberculosis (MTB) from patients with multidrug-resistant TB (MDR-TB) and pre-extensively drug-resistant TB (pre-XDR-TB), and to explore new drug-resistant mechanisms of SQ109.
METHODS
METHODS
We evaluated the in vitro activity of SQ109 against clinical isolates from patients with MDR-TB and pre-XDR-TB using minimal inhibitory concentration (MIC) assay. The drug-resistant gene, mmpL3 of SQ109-resistant strains was sequenced, and a quantitative real-time PCR assay was used to analyze 28 efflux pump genes in SQ109-resistant strains without mmpL3 mutations. The role of candidate efflux pumps mmpL5 and mmpL7 on the MIC of SQ109 was evaluated using recombinantly cloned MmpL5 and MmpL7 expressed in Mycobacterium smegmatis.
RESULTS
RESULTS
The MIC
CONCLUSIONS
CONCLUSIONS
Our data demonstrated that SQ109 exhibited excellent levels of in vitro activity against MTB. MmpL7 may be a potential gene for MTB resistance to SQ109, providing a useful target for detecting SQ109 resistance in MTB.
Identifiants
pubmed: 39342331
doi: 10.1186/s12941-024-00746-8
pii: 10.1186/s12941-024-00746-8
doi:
Substances chimiques
Antitubercular Agents
0
Membrane Transport Proteins
0
Bacterial Proteins
0
N-geranyl-N'-(2-adamantyl)ethane-1,2-diamine
0
Adamantane
PJY633525U
Ethylenediamines
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
87Subventions
Organisme : Beijing Natural Science Foundation (Youth Program)
ID : No.7224324
Organisme : "Young talents" program of Beijing hospitals Authority
ID : QML20231606
Informations de copyright
© 2024. The Author(s).
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