scholarly journals Sequence analysis for detection of drug resistance in Mycobacterium tuberculosis complex isolates from the Central Region of Cameroon

2014 ◽  
Vol 14 (1) ◽  
pp. 113 ◽  
Author(s):  
Emmanuel Tekwu ◽  
Larissa Sidze ◽  
Jean-Paul Assam ◽  
Jean-Claude Tedom ◽  
Serges Tchatchouang ◽  
...  
2019 ◽  
Vol 8 (4) ◽  
pp. 320
Author(s):  
MohdSalleh Zaki ◽  
MohdNur Noorizhab Fakhruzzaman ◽  
NorzulianaZainal Abidin ◽  
ZirwatulAdilah Aziz ◽  
WaiFeng Lim ◽  
...  

2018 ◽  
Vol 24 (3) ◽  
pp. 569-572 ◽  
Author(s):  
Ariadna Rando-Segura ◽  
María Luisa Aznar ◽  
María Milagros Moreno ◽  
Mateu Espasa ◽  
Elena Sulleiro ◽  
...  

2018 ◽  
Vol 24 (3) ◽  
pp. 569-572
Author(s):  
Ariadna Rando-Segura ◽  
María Luisa Aznar ◽  
María Milagros Moreno ◽  
Mateu Espasa ◽  
Elena Sulleiro ◽  
...  

Pharmaceutics ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 952
Author(s):  
Filipa Santos ◽  
Luís C. Branco ◽  
Ana Rita C. Duarte

Tuberculosis is one of the ten causes of morbidity and mortality worldwide caused by Mycobacterium tuberculosis complex. Some of the anti-tuberculosis drugs used in clinic studies, despite being effective for the treatment of tuberculosis, present serious adverse effects as well as poor bioavailability, stability, and drug-resistance problems. Thus, it is important to develop approaches that could provide shorter drug regimens, preventing drug resistance, toxicity of the antibiotics, and improve their bioavailability. Herein, we reported the use of organic salts based on the isoniazid drug, which can act as an organic cation combined with suitable organic anions such as alkylsulfonate-based (mesylate, R or S-Camphorsulfonate), carboxylate-based (glycolate, vanylate) and sacharinate. The synthesis, characterization, and cytotoxicity studies comparing with the original isoniazid drug have been performed. The possibility to explore dicationic salts seems promising in order to improve original bioavailability, and promote the elimination of polymorphic forms as well as higher stability, which are relevant characteristics that the pharmaceutical industry pursues.


2020 ◽  
Vol 16 (1) ◽  
pp. 7-19
Author(s):  
Nakamura-Lopez Yuko ◽  
Valencia-Carmona Oscar Daniel ◽  
Martinez-Cruz Perla Monica ◽  
Palma-Nicolas Jose Prisco ◽  
Gonzalez-y-Merchand Jorge Alberto ◽  
...  

1997 ◽  
Vol 41 (3) ◽  
pp. 636-640 ◽  
Author(s):  
S Sreevatsan ◽  
X Pan ◽  
Y Zhang ◽  
B N Kreiswirth ◽  
J M Musser

A gene (pncA) with mutations associated with pyrazinamide resistance in Mycobacterium tuberculosis complex members was characterized in 67 pyrazinamide-resistant and 51 pyrazinamide-susceptible isolates recovered from diverse geographic localities and anatomic sites and typed by IS6110 profiling. All pyrazinamide-susceptible organisms had identical pncA alleles. In striking contrast, 72% of the 67 resistant organisms had pncA mutations that altered the primary amino acid sequence of pyrazinamidase. A total of 17 previously undescribed mutations were found, including upstream mutations, missense changes, nucleotide insertions and deletions, and termination mutations. The mutations were arrayed along virtually the entire length of the gene. These data are further evidence that most drug resistance in M. tuberculosis is due to simple mutations occurring in chromosomally encoded genes rather than to acquisition of resistance genes by horizontal transfer events.


2011 ◽  
Vol 55 (9) ◽  
pp. 4408-4411 ◽  
Author(s):  
Michaela Projahn ◽  
Claudio U. Köser ◽  
Susanne Homolka ◽  
David K. Summers ◽  
John A. C. Archer ◽  
...  

ABSTRACTSequence analyses of 74 strains that encompassed major phylogenetic lineages of theMycobacterium tuberculosiscomplex revealed 10 polymorphisms inmshA(Rv0486) and four polymorphisms ininhA(Rv1484) that were not responsible for isoniazid or prothionamide resistance. Instead, some of these mutations were phylogenetically informative. This genetic diversity must be taken into consideration for drug development and for the design of molecular tests for drug resistance.


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