Sequential inactivation of rdxA (HP0954) and frxA (HP0642) nitroreductase genes causes moderate and high-level metronidazole resistance in Helicobacter pylori
JY Jeong, AK Mukhopadhyay, D Dailidiene… - Journal of …, 2000 - Am Soc Microbiol
Helicobacter pylori is a human-pathogenic bacterial species that is subdivided
geographically, with different genotypes predominating in different parts of the world. Here …
geographically, with different genotypes predominating in different parts of the world. Here …
Genetic analysis of Helicobacter pylori clinical isolates suggests resistance to metronidazole can occur without the loss of functional rdxA
SY Kim, YM Joo, HS Lee, IS Chung, YJ Yoo… - The Journal of …, 2009 - nature.com
Resistance to metronidazole (MTZ) in Helicobacter pylori is associated with mutations in
rdxA, encoding an oxygen-insensitive NADPH nitroreductase, and mutations in frxA …
rdxA, encoding an oxygen-insensitive NADPH nitroreductase, and mutations in frxA …
Roles of FrxA and RdxA Nitroreductases ofHelicobacter pylori in Susceptibility and Resistance to Metronidazole
JY Jeong, AK Mukhopadhyay, JK Akada… - Journal of …, 2001 - Am Soc Microbiol
The relative importance of the frxA and rdxA nitroreductase genes of Helicobacter pylori in
metronidazole (MTZ) susceptibility and resistance has been controversial. Jeong et al.(J …
metronidazole (MTZ) susceptibility and resistance has been controversial. Jeong et al.(J …
Metronidazole resistance in Helicobacter pylori is due to null mutations in a gene (rdxA) that encodes an oxygen‐insensitive NADPH nitroreductase
A Goodwin, D Kersulyte, G Sisson… - Molecular …, 1998 - Wiley Online Library
Metronidazole (Mtz) is a critical component of combination therapies that are used against
Helicobacter pylori, the major cause of peptic ulcer disease. Many H. pylori strains are Mtz …
Helicobacter pylori, the major cause of peptic ulcer disease. Many H. pylori strains are Mtz …
Analysis of rdxA and involvement of additional genes encoding NAD (P) H flavin oxidoreductase (FrxA) and ferredoxin-like protein (FdxB) in metronidazole resistance …
DH Kwon, FAK El-Zaatari, M Kato… - Antimicrobial agents …, 2000 - Am Soc Microbiol
Metronidazole (Mtz) is a critical ingredient of modern multidrug therapies for Helicobacter
pylori infection. Mtz resistance reduces the effectiveness of these combinations. Although …
pylori infection. Mtz resistance reduces the effectiveness of these combinations. Although …
Insertion of Mini-IS605 and Deletion of Adjacent Sequences in the Nitroreductase (rdxA) Gene Cause Metronidazole Resistance in Helicobacter pyloriNCTC11637
YJ Debets-Ossenkopp, RGJ Pot… - Antimicrobial agents …, 1999 - Am Soc Microbiol
We found that NCTC11637, the type strain of Helicobacter pylori, the causative agent of
peptic ulcer disease and an early risk factor for gastric cancer, is metronidazole resistant …
peptic ulcer disease and an early risk factor for gastric cancer, is metronidazole resistant …
Analysis of the rdxA gene in high-level metronidazole-resistant clinical isolates confirms a limited use of rdxA mutations as a marker for prediction of metronidazole resistance in …
S Bereswill, C Krainick, F Stähler… - FEMS Immunology & …, 2003 - academic.oup.com
Metronidazole (Mtz) resistance in the gastric pathogen Helicobacter pylori is closely
associated with inactivation of the nitroreductase gene rdxA. In order to identify respective …
associated with inactivation of the nitroreductase gene rdxA. In order to identify respective …
Search for novel candidate mutations for metronidazole resistance in Helicobacter pylori using next-generation sequencing
TT Binh, R Suzuki, TTH Trang, DH Kwon… - Antimicrobial agents …, 2015 - Am Soc Microbiol
Metronidazole resistance is a key factor associated with Helicobacter pylori treatment failure.
Although this resistance is mainly associated with mutations in the rdxA and frxA genes, the …
Although this resistance is mainly associated with mutations in the rdxA and frxA genes, the …
Metronidazole resistance in Helicobacter pylori
PJ Jenks, DI Edwards - International Journal of antimicrobial agents, 2002 - Elsevier
Modern triple drug regimens are highly effective for treating Helicobacter pylori infection, but
bacterial resistance to one of the most effective antibiotics, metronidazole, is a serious and …
bacterial resistance to one of the most effective antibiotics, metronidazole, is a serious and …
Frameshift mutations in rdxA and metronidazole resistance in North American Helicobacter pylori isolates
DH Kwon, JA Peña, MS Osato, JG Fox… - Journal of …, 2000 - academic.oup.com
In Helicobacter pylori, the oxygen-insensitive nitroreductase RdxA is likely to activate
metronidazole (Mtz) by reduction and formation of cytotoxic intermediates. Mutations in rdxA …
metronidazole (Mtz) by reduction and formation of cytotoxic intermediates. Mutations in rdxA …
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