Academic Journal
NOS2-deficient mice with hypoxic necrotizing lung lesions predict outcomes of tuberculosis chemotherapy in humans
| Title: | NOS2-deficient mice with hypoxic necrotizing lung lesions predict outcomes of tuberculosis chemotherapy in humans |
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| Authors: | Martin Gengenbacher, Maria A. Duque-Correa, Peggy Kaiser, Stefanie Schuerer, Doris Lazar, Ulrike Zedler, Stephen T. Reece, Amit Nayyar, Stewart T. Cole, Vadim Makarov, Clifton E. Barry III, Véronique Dartois, Stefan H. E. Kaufmann |
| Source: | Scientific Reports, Vol 7, Iss 1, Pp 1-10 (2017) |
| Publisher Information: | Nature Portfolio, 2017. |
| Publication Year: | 2017 |
| Collection: | LCC:Medicine LCC:Science |
| Subject Terms: | Medicine, Science |
| More Details: | Abstract During active TB in humans a spectrum of pulmonary granulomas with central necrosis and hypoxia exists. BALB/c mice, predominantly used in TB drug development, do not reproduce this complex pathology thereby inaccurately predicting clinical outcome. We found that Nos2 −/− mice incapable of NO-production in immune cells as microbial defence uniformly develop hypoxic necrotizing lung lesions, widely observed in human TB. To study the impact of hypoxic necrosis on the efficacy of antimycobacterials and drug candidates, we subjected Nos2 −/− mice with TB to monotherapy before or after establishment of human-like pathology. Isoniazid induced a drug-tolerant persister population only when necrotic lesions were present. Rifapentine was more potent than rifampin prior to development of human-like pathology and equally potent thereafter, in agreement with recent clinical trials. Pretomanid, delamanid and the pre-clinical candidate BTZ043 were bactericidal independent of pulmonary pathology. Linezolid was bacteriostatic in TB-infected Nos2 −/− mice but significantly improved lung pathology. Hypoxic necrotizing lesions rendered moxifloxacin less active. In conclusion, Nos2 −/− mice are a predictive TB drug development tool owing to their consistent development of human-like pathology. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2045-2322 |
| Relation: | https://doaj.org/toc/2045-2322 |
| DOI: | 10.1038/s41598-017-09177-2 |
| Access URL: | https://doaj.org/article/653956e7764245f0bc27af8e6d730cfa |
| Accession Number: | edsdoj.653956e7764245f0bc27af8e6d730cfa |
| Database: | Directory of Open Access Journals |
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| ISSN: | 20452322 |
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| DOI: | 10.1038/s41598-017-09177-2 |
| Published in: | Scientific Reports |
| Language: | English |