
This week, we provide an brief overview of research supported by CNRS, INSERM, Institut Pasteur and other donors providing new evidence of the role of Zinc in the body’s immune response to intracellular infection by M.tb. and the microbe’s strategy to subvert this defense. Additional links to TB R&D news are included.
This week we highlight an article published out of Ying Zhang’s laboratory at Johns Hopkins University that puts forth a new model for the mode of action of pyrazinamide (PZA) and as well as suggest trans-translation as a potential target to consider in the development of new drugs for TB. Additional links to TB R&D news are included.
This week we have an article by researchers from Portugal that suggests that in the case of resistance conferred by plasmids that in some cases resistant bacteria increases its ability to replicate and overall fitness compared to susceptible bacteria. This may complicate research and control efforts to address the rising problem of multi-drug resistance. Additional links to TB R&D News are included.
This week’s featured article from Bill Jacob’s lab looks at novel InhA (target of isoniazid (INH), a first-line TB drug) inhibitors and their ability to kill M. tuberculosis (M.tb) that is drug-sensitive, resistant and in dormant stage. Two compounds were identified that had significant bactericidal activity against M.tb: CD 39 and CD117. Additional links to TB R&D News are included.
This week we look again at the role of efflux pumps in resistance to anti-tuberculosis drugs. Louw, et al., sought to “demonstrate that the level of rifampicin resistance is defined by efflux, which regulates the intracellular concentration of rifampicin.” This is a shift from the current thinking in the field that rifampicin resistance is solely the result of mutations in the rpoB gene. The article entitled “Rifampicin Reduces Susceptibility to Ofloxacin in Rifampicin Resistant Mycobacterium tuberculosis through Efflux” was published ahead of print in the American Journal of Respiratory and Critical Care Medicine. Additional links to TB R&D News is included.
In this week’s article, potential cellular biomarkers are explored in the mouse model with three potential markers: PD-1 and TIM-3 on CD8 T cells and KIRG-1 on both CD4 and CD8 T cells. The search for validated biomarkers that can predict treatment success has been a difficult one. The focus of much of the research on biomarkers has been on serum markers, because of practical reasons and considerations of use in resource-limited settings. Henao-Tamayo, et al., took a different focus looking at markers on the surface of lung T cells. Additional links to TB R&D News are included.
This week, we feature an interview with Dr. Edward Nardell who is a pulmonologist with a special interest in tuberculosis. His principal academic appointment is as associate professor of medicine, Harvard Medical School. In 2002 he joined Partners In Health as Director of Tuberculosis Research. During the interview, we discuss with Dr. Nardell his background and interest in TB, the Airbourne Infections Research (AIR) Facility, his thoughts on the MDR-TB epidemic, and his current research focus. Additional links to TB R&D News are included.
Dr. Peter Andersen, the Vice President of Vaccine Research and Development at Statens Serum Institut (SSI) and TBVI partner, has been awarded the prestigious Novo Nordisk prize for his work in TB vaccine development. The WGND interviewed Dr. Andersen for our TB R&D Weekly Update on March 8. Congratulations to Dr. Andersen! For full story, [...]