Efflux Activity Differentially Modulates the Levels of Isoniazid and Rifampicin Resistance among Multidrug Resistant and Monoresistant Mycobacterium tuberculosis Strains

Authors: Machado D, Perdigão J, Portugal I, Pieroni M, Silva PA, Couto I, Viveiros M
Publication Year: 2018
Journal: Antibiotics
Link: http://www.mdpi.com/2079-6382/7/1/18/htm

With the growing body of knowledge on the contribution of efflux activity toMycobacterium tuberculosisdrug resistance, increased attention has been given to the use of efflux inhibitors as adjuvants of tuberculosis therapy. Here, we investigated how efflux activity modulates the levels of efflux between monoresistant and multi- and extensively drug resistant (M/XDR)M. tuberculosisclinical isolates. The strains […]
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Genome-wide analysis of multi- and extensively drug-resistant Mycobacterium tuberculosis

Authors: Coll F, Phelan J, Hill-Cawthorne GA, Nair MB, Mallard K, Ali S, Abdallah AM, Alghamdi S, Alsomali M, Ahmed AO, Portelli S, Oppong Y, Alves A, Bessa TB, Campino S, Caws M, Chatterjee A, Crampin AC, Dheda K, Furnham N, Glynn JR, Grandjean L, Minh Ha D, Hasan R, Hasan Z, Hibberd ML, Joloba M, Jones-López EC, Matsumoto T, Miranda A, Moore DJ, Mocillo N, Panaiotov S, Parkhill J, Penha C, Perdigão J, Portugal I, Rchiad Z, Robledo J, Sheen P, Shesha NT, Sirgel FA, Sola C, Oliveira Sousa E, Streicher EM, Helden PV, Viveiros M, Warren RM, McNerney R, Pain A, Clark TG
Publication Year: 2018
Journal: Nature Genetics
Link: https://www.nature.com/articles/s41588-017-0029-0%20

To characterize the genetic determinants of resistance to antituberculosis drugs, we performed a genome-wide association study (GWAS) of 6,465 Mycobacterium tuberculosis clinical isolates from more than 30 countries. A GWAS approach within a mixed-regression framework was followed by a phylogenetics-based test for independent mutations. In addition to mutations in established and recently described resistance-associated genes, […]
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Methylation in Mycobacterium tuberculosis is lineage specific with associated mutations present globally

Authors: Phelan J, De Sessions PF, Tientcheu L, Perdigão J, Machado D, Hasan R, Hasan Z, Bergval I, Anthony R, McNerney R, Antonio M, Portugal I, Viveiros M, Campino S, Hibberd ML, Clark TG
Publication Year: 2018
Journal: Scientific Reports
Link: https://www.nature.com/articles/s41598-017-18188-y%20

DNA methylation is an epigenetic modification of the genome involved in regulating crucial cellular processes, including transcription and chromosome stability. Advances in PacBio sequencing technologies can be used to robustly reveal methylation sites. The methylome of the Mycobacterium tuberculosis complex is poorly understood but may be involved in virulence, hypoxic survival and the emergence of […]
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Clonal expansion across the seas as seen through CPLP-TB database: A joint effort in cataloguing Mycobacterium tuberculosis genetic diversity in Portuguese-speaking countries

Authors: Perdigão J, Silva C, Diniz J, Pereira C, Machado D, Ramos J, Silva H, Abilleira F, Brum C, Reis AJ, Macedo M, Scaini JL, Silva AB, Esteves L, Macedo R, Maltez F, Clemente S, Coelho E, Viegas S, Rabna P, Rodrigues A, Taveira N, Jordao L, Kritski A, Lapa e Silva JR, Mokrousov I, Couvin D, Rastogi N, Couto I, Pain A, McNerney R, Clark TG, von Groll A, Dalla Costa ER, Rossetti ML, Silva PEA, Viveiros M, Portugal I
Publication Year: 2019
Journal: Infection Genetics and Evolution
Link: https://www.sciencedirect.com/science/article/pii/S1567134818301023?via%3Dihub%20

Tuberculosis (TB) remains a major health problem within the Community of Portuguese Language Speaking Countries (CPLP). Despite the marked variation in TB incidence across its member-states and continued human migratory flux between countries, a considerable gap in the knowledge on the Mycobacterium tuberculosis population structure and strain circulation between the countries still exists. To address […]
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Genomic diversity of drug-resistant Mycobacterium tuberculosis isolates in Lisbon Portugal: Towards tuberculosis genomic epidemiology

Authors: Clark T, Coll F, Couto I, Hill-Cawthorne GA, Jordao L, Macedo R, Machado D, Mallard K, Maltez F, McNerney R, Pain A, Perdigão J, Portugal I, Silva C, Silva H, Viveiros M
Publication Year: 2015
Journal: International Journal of Mycobacteriology
Link: https://www.sciencedirect.com/science/article/pii/S2212553115000254

Multidrug- (MDR) and extensively drug-resistant (XDR) tuberculosis (TB) present a challenge to disease control and elimination goals. Lisbon, Portugal, has a high TB incidence rate and unusual and successful XDR-TB strains that have been found in circulation for almost two decades. For the last 20 years, a continued circulation of two phylogenetic clades, Lisboa3 and […]
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Efflux Activity Differentially Modulates the Levels of Isoniazid and Rifampicin Resistance among Multidrug Resistant and Monoresistant Mycobacterium tuberculosis Strains

Genome-wide analysis of multi- and extensively drug-resistant Mycobacterium tuberculosis

Methylation in Mycobacterium tuberculosis is lineage specific with associated mutations present globally

Clonal expansion across the seas as seen through CPLP-TB database: A joint effort in cataloguing Mycobacterium tuberculosis genetic diversity in Portuguese-speaking countries

Genomic diversity of drug-resistant Mycobacterium tuberculosis isolates in Lisbon Portugal: Towards tuberculosis genomic epidemiology

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