title: Susceptibility of Mycobacterium abscessus to antimycobacterial drugs in preclinical models.
abstract: Over the last 10 years, Mycobacterium abscessus group strains have emerged as important human pathogens, which are associated with significantly higher fatality rates than any other rapidly growing mycobacteria. These opportunistic pathogens are widespread in the environment and can cause a wide range of clinical diseases, including skin, soft tissue, central nervous system, and disseminated infections; by far, the most difficult to treat is the pulmonary form. Infections with M. abscessus are often multidrug-resistant (MDR) and require prolonged treatment with various regimens and, many times, result in high mortality despite maximal therapy. We report here the evaluation of diverse mouse infection models for their ability to produce a progressive high level of infection with M. abscessus. The nude (nu/nu), SCID (severe combined immunodeficiency), gamma interferon knockout (GKO), and granulocyte-macrophage colony-stimulating factor (GMCSF) knockout mice fulfilled the criteria for an optimal model for compound screening. Thus, we set out to assess the antimycobacterial activity of clarithromycin, clofazimine, bedaquiline, and clofazimine-bedaquiline combinations against M. abscessus-infected GKO and SCID murine infection models. Treatment of GKO and SCID mice with a combination of clofazimine and bedaquiline was the most effective in decreasing the M. abscessus organ burden.
authors: Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, USA.
authors: Andrés
authors: A
authors: Obregón-Henao
authors: Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, USA.
authors: Kimberly A
authors: KA
authors: Arnett
authors: Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, USA.
authors: Marcela
authors: M
authors: Henao-Tamayo
authors: Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, USA.
authors: Lisa
authors: L
authors: Massoudi
authors: Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, USA.
authors: Elizabeth
authors: E
authors: Creissen
authors: Janssen Pharmaceutica, Beerse, Belgium.
authors: Koen
authors: K
authors: Andries
authors: Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, USA.
authors: Anne J
authors: AJ
authors: Lenaerts
authors: Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, USA d.ordway@colostate.edu.
authors: Diane J
authors: DJ
authors: Ordway
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D017291:Clarithromycin / Q000494:pharmacology; D002991:Clofazimine / Q000494:pharmacology; D064687:Diarylquinolines / Q000494:pharmacology; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D018345:Mice, Knockout; D016513:Mice, SCID; D008826:Microbial Sensitivity Tests; D009161:Mycobacterium / Q000187:drug effects*; D009164:Mycobacterium Infections
chemical_list: D000900:Anti-Bacterial Agents; D064687:Diarylquinolines; C493870:bedaquiline; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D002991:Clofazimine; D017291:Clarithromycin