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Zhong X, Lin A, Luo J, Li Y, Chen J, Ning C, Cao F. Clinical research progress of novel antituberculosis drugs on multidrug-resistant tuberculosis. Postgrad Med J 2024; 100:366-372. [PMID: 38200633 DOI: 10.1093/postmj/qgad140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/05/2023] [Accepted: 12/10/2023] [Indexed: 01/12/2024]
Abstract
Multidrug-resistant tuberculosis (MDR-TB) has become a critical challenge to public health, and the prevention and treatment of MDR-TB are of great significance in reducing the global burden of tuberculosis. How to improve the effectiveness and safety of chemotherapy for MDR-TB is a pressing issue that needs to be addressed in tuberculosis control efforts. This article provides a comprehensive review of the clinical application of new antituberculosis drugs in MDR-TB, aiming to provide a scientific basis for the prevention and treatment strategy of MDR-TB.
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Affiliation(s)
- Xinxin Zhong
- Department of Pulmonary and Critical Care Medicine, Red Cross Hospital of Yulin City, Yulin, Guangxi 537000, China
| | - Ao Lin
- Department of Cardiothoracic Surgery, Red Cross Hospital of Yulin City, Yulin, Guangxi 537000, China
| | - Jian Luo
- Department of Pulmonary and Critical Care Medicine, Red Cross Hospital of Yulin City, Yulin, Guangxi 537000, China
| | - Yeqin Li
- Department of Pulmonary and Critical Care Medicine, Red Cross Hospital of Yulin City, Yulin, Guangxi 537000, China
| | - Jinlan Chen
- Department of Pulmonary and Critical Care Medicine, Red Cross Hospital of Yulin City, Yulin, Guangxi 537000, China
| | - Chao Ning
- Department of Pulmonary and Critical Care Medicine, Red Cross Hospital of Yulin City, Yulin, Guangxi 537000, China
| | - Fu Cao
- Department of Pulmonary and Critical Care Medicine, Red Cross Hospital of Yulin City, Yulin, Guangxi 537000, China
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2
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Yu W, Ju Y, Han X, Tian X, Ding J, Wang S, Hameed HMA, Gao Y, Li L, Li Y, Zhong N, Zhang T. Bactericidal and sterilizing activity of sudapyridine-clofazimine-TB47 combined with linezolid or pyrazinamide in a murine model of tuberculosis. Antimicrob Agents Chemother 2024:e0012424. [PMID: 38690893 DOI: 10.1128/aac.00124-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 04/07/2024] [Indexed: 05/03/2024] Open
Abstract
As an obligate aerobe, Mycobacterium tuberculosis relies on its branched electron transport chain (ETC) for energy production through oxidative phosphorylation. Regimens targeting ETC exhibit promising potential to enhance bactericidal activity against M. tuberculosis and hold the prospect of shortening treatment duration. Our previous research demonstrated that the bacteriostatic drug candidate TB47 (T) inhibited the growth of M. tuberculosis by targeting the cytochrome bc1 complex and exhibited synergistic activity with clofazimine (C). Here, we found synergistic activities between C and sudapyridine (S), a structural analog of bedaquiline (B). S has shown similar anti-tuberculosis efficacy and may share a mechanism of action with B, which inhibits ATP synthesis and the energy metabolism of bacteria. We evaluated the efficacy of SCT in combination with linezolid (L) or pyrazinamide (Z) using a well-established murine model of tuberculosis. Compared to the BPa(pretomanid)L regimen, SCT and SCTL demonstrated similar bactericidal and sterilizing activities. There was no significant difference in activity between SCT and SCTL. In contrast, SCZ and SCTZ showed much higher activities, with none of the 15 mice experiencing relapse after 2 months of treatment with either SCZ or SCTZ. However, T did not contribute to the activity of the SCZ. Our findings emphasize the efficacy and the potential clinical significance of combination therapy with ETC inhibitors. Additionally, cross-resistance exists not only between S and B but also between S/B and C. This is supported by our findings, as spontaneous S-resistant mutants exhibited mutations in Rv0678, which are associated with cross-resistance to B and C.
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Affiliation(s)
- Wei Yu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangzhou National Laboratory, Guangzhou, China
| | - Yanan Ju
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Division of Life Science and Medicine, School of Basic Medical Sciences, University of Science and Technology of China, Hefei, China
| | - Xingli Han
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Medical School, University of Chinese Academy of Sciences, Beijing, China
| | - Xirong Tian
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Medical School, University of Chinese Academy of Sciences, Beijing, China
| | - Jie Ding
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Institute of Physical Science and Information Technology, Anhui University, Hefei, China
| | - Shuai Wang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - H M Adnan Hameed
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Yamin Gao
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Lei Li
- Shanghai Jiatan Pharmatech Co., Ltd, a subsidiary of Guangzhou JOYO Pharma Ltd., Shanghai, China
| | - Yongguo Li
- Shanghai Jiatan Pharmatech Co., Ltd, a subsidiary of Guangzhou JOYO Pharma Ltd., Shanghai, China
| | - Nanshan Zhong
- Guangzhou National Laboratory, Guangzhou, China
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, The National Center for Respiratory Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Tianyu Zhang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Diseases, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangzhou National Laboratory, Guangzhou, China
- Division of Life Science and Medicine, School of Basic Medical Sciences, University of Science and Technology of China, Hefei, China
- Medical School, University of Chinese Academy of Sciences, Beijing, China
- Institute of Physical Science and Information Technology, Anhui University, Hefei, China
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Singh S, Gumbo T, Boorgula GD, Thomas TA, Philley JV, Srivastava S. Omadacycline pharmacokinetics/pharmacodynamics and efficacy against multidrug-resistant Mycobacterium tuberculosis in the hollow fiber system model. Antimicrob Agents Chemother 2024; 68:e0108023. [PMID: 38131673 PMCID: PMC10848755 DOI: 10.1128/aac.01080-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 11/03/2023] [Indexed: 12/23/2023] Open
Abstract
Seventy-five years ago, first-generation tetracyclines demonstrated limited efficacy in the treatment of tuberculosis but were more toxic than efficacious. We performed a series of pharmacokinetic/pharmacodynamic (PK/PD) experiments with a potentially safer third-generation tetracycline, omadacycline, for the treatment of multidrug-resistant tuberculosis (MDR-TB). Mycobacterium tuberculosis (Mtb) H37Rv and an MDR-TB clinical strain (16D) were used in the minimum inhibitory concentration (MIC) and static concentration-response studies in test tubes, followed by a PK/PD study using the hollow fiber system model of TB (HFS-TB) that examined six human-like omadacycline doses. The inhibitory sigmoid maximal effect (Emax) model and Monte Carlo experiments (MCEs) were used for data analysis and clinical dose-finding, respectively. The omadacycline MIC for both Mtb H37Rv and MDR-TB clinical strain was 16 mg/L but dropped to 4 mg/L with daily drug supplementation to account for omadacycline degradation. The Mycobacteria Growth Indicator Tube MIC was 2 mg/L. In the test tubes, omadacycline killed 4.39 log10 CFU/mL in 7 days. On Day 28 of the HFS-TB study, the Emax was 4.64 log10 CFU/mL, while exposure mediating 50% of Emax (EC50) was an area under the concentration-time curve to MIC (AUC0-24/MIC) ratio of 22.86. This translates to PK/PD optimal exposure or EC80 as AUC0-24/MIC of 26.93. The target attainment probability of the 300-mg daily oral dose was 90% but fell at MIC ≧4 mg/L. Omadacycline demonstrated efficacy and potency against both drug-susceptible and MDR-TB. Further studies are needed to identify the omadacycline effect in combination therapy for the treatment of both drug-susceptible and MDR-TB.
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Affiliation(s)
- Sanjay Singh
- Department of Medicine, School of Medicine, University of Texas at Tyler, Tyler, Texas, USA
| | - Tawanda Gumbo
- Quantitative Preclinical and Clinical Sciences Department, Praedicare Inc., Dallas, Texas, USA
- Hollow Fiber System and Experimental Therapeutics Laboratories, Praedicare Inc., Dallas, Texas, USA
| | - Gunavanthi D. Boorgula
- Department of Medicine, School of Medicine, University of Texas at Tyler, Tyler, Texas, USA
| | - Tania A. Thomas
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, USA
| | - Julie V. Philley
- Section of Pulmonary and Critical Care, School of Medicine, University of Texas at Tyler, Tyler, Texas, USA
| | - Shashikant Srivastava
- Department of Medicine, School of Medicine, University of Texas at Tyler, Tyler, Texas, USA
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas, USA
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Almeida D, Li SY, Lee J, Hafkin B, Mdluli K, Fotouhi N, Nuermberger EL. Contezolid can replace linezolid in a novel combination with bedaquiline and pretomanid in a murine model of tuberculosis. Antimicrob Agents Chemother 2023; 67:e0078923. [PMID: 37966090 PMCID: PMC10720489 DOI: 10.1128/aac.00789-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 08/16/2023] [Indexed: 11/16/2023] Open
Abstract
Contezolid is a new oxazolidinone with in vitro and in vivo activity against Mycobacterium tuberculosis comparable to that of linezolid. Pre-clinical and clinical safety studies suggest it may be less toxic than linezolid, making contezolid a potential candidate to replace linezolid in the treatment of drug-resistant tuberculosis. We evaluated the dose-ranging activity of contezolid, alone and in combination with bedaquiline and pretomanid, and compared it with linezolid at similar doses, in an established BALB/c mouse model of tuberculosis. Contezolid had an MIC of 1 µg/mL, similar to linezolid, and exhibited similar bactericidal activity in mice. Contezolid-resistant mutants selected in vitro had 32- to 64-fold increases in contezolid MIC and harbored mutations in the mce3R gene. These mutants did not display cross-resistance to linezolid. Our results indicate that contezolid has the potential to replace linezolid in regimens containing bedaquiline and pretomanid and likely other regimens.
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Affiliation(s)
- Deepak Almeida
- Department of Medicine, Johns Hopkins University Center for Tuberculosis Research, Baltimore, Maryland, USA
| | - Si-Yang Li
- Department of Medicine, Johns Hopkins University Center for Tuberculosis Research, Baltimore, Maryland, USA
| | - Jin Lee
- Department of Medicine, Johns Hopkins University Center for Tuberculosis Research, Baltimore, Maryland, USA
| | - Barry Hafkin
- MicuRx Pharmaceuticals, Foster City, California, USA
| | - Khisimuzi Mdluli
- Global Alliance for Tuberculosis Drug Development, New York, USA
| | - Nader Fotouhi
- Global Alliance for Tuberculosis Drug Development, New York, USA
| | - Eric L. Nuermberger
- Department of Medicine, Johns Hopkins University Center for Tuberculosis Research, Baltimore, Maryland, USA
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5
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Nguyen TVA, Nguyen QH, Nguyen TNT, Anthony RM, Vu DH, Alffenaar JWC. Pretomanid resistance: An update on emergence, mechanisms and relevance for clinical practice. Int J Antimicrob Agents 2023; 62:106953. [PMID: 37595848 DOI: 10.1016/j.ijantimicag.2023.106953] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 06/20/2023] [Accepted: 08/11/2023] [Indexed: 08/20/2023]
Abstract
Pretomanid (PA-824), a novel anti-tuberculosis (TB) nitroimidazoxazine, has been approved for multi-drug-resistant TB treatment for a few years. Pretomanid has been demonstrated to be highly active against Mycobacterium tuberculosis when combined with other anti-TB drugs. This review provides an update of the current knowledge on the modes of action, resistance mechanisms, emergence of drug resistance, and status of antimicrobial susceptibility testing for pretomanid and its relevance for clinical practice. Pretomanid resistance has been reported in in-vitro and animal models but not yet in clinical trials. Pretomanid-resistance-associated mutations have been reported in the fbiA, fbiB, fbiC, fbiD, ddn and fgd1 genes. However, understanding of in-vivo molecular resistance mechanisms remains limited, and complicates the development of accurate antimicrobial susceptibility testing methods for pretomanid. As such, no reference method for antimicrobial susceptibility testing of pretomanid has been established to guide clinical use. Further studies linking specific mutations, in-vitro susceptibility, drug exposure and resistance mechanisms to treatment failure with pretomanid should be prioritized.
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Affiliation(s)
- Thi Van Anh Nguyen
- LMI DRISA, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Quang Huy Nguyen
- LMI DRISA, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Tran Nam Tien Nguyen
- National Centre of Drug information and Adverse Drug Reaction Monitoring, Hanoi University of Pharmacy, Hanoi, Vietnam
| | - Richard M Anthony
- National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Dinh Hoa Vu
- National Centre of Drug information and Adverse Drug Reaction Monitoring, Hanoi University of Pharmacy, Hanoi, Vietnam
| | - Jan-Willem C Alffenaar
- School of Pharmacy, Faculty of Medicine and Health, University of Sydney, Sydney, Australia; Westmead Hospital, Sydney, Australia; Sydney Institute for Infectious Diseases, University of Sydney, Sydney, Australia.
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6
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Eedara BB, Fan C, Sinha S, Khadka P, Das SC. Inhalable Combination Powder Formulations for Treating Latent and Multidrug-Resistant Tuberculosis: Formulation and In Vitro Characterization. Pharmaceutics 2023; 15:2354. [PMID: 37765321 PMCID: PMC10536221 DOI: 10.3390/pharmaceutics15092354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/11/2023] [Accepted: 09/19/2023] [Indexed: 09/29/2023] Open
Abstract
Tuberculosis (TB) is an infectious disease resulting in millions of deaths annually worldwide. TB treatment is challenging due to a huge number of global latent infections and due to multidrug-resistant forms of TB. Inhaled administration of anti-TB drugs using dry powder inhalers has various advantages over oral administration due to its direct drug delivery and minimization of systemic side effects. Pretomanid (PA-824, PA) is a relatively new drug with potent activity against both active and latent forms of Mycobacterium tuberculosis (Mtb). It is also known for its synergistic effects in combination with pyrazinamide (PYR) and moxifloxacin (MOX). Fixed-dose combination powder formulations of either PYR and PA or PYR and MOX were prepared for inhaled delivery to the deep lung regions where the Mtb habitats were located. Powder formulations were prepared by spray drying using L-leucine as the aerosolization enhancer and were characterized by their particle size, morphology and solid-state properties. In vitro aerosolization behaviour was studied using a Next Generation Impactor, and stability was assessed after storage at room temperature and 30% relative humidity for three months. Spray drying with L-leucine resulted in spherical dimpled particles, 1.9 and 2.4 µm in size for PYR-PA and PYR-MOX combinations, respectively. The powder formulations had an emitted dose of >83% and a fine particle fraction of >65%. PA and MOX showed better stability in the combination powders compared to PYR. Combination powder formulations with high aerosolization efficiency for direct delivery to the lungs were developed in this study for use in the treatment of latent and multidrug-resistant TB infections.
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Affiliation(s)
- Basanth Babu Eedara
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
- Transpire Bio Inc., 2945 W Corporate Lakes Blvd Suite A, Weston, FL 33331, USA
| | - Claire Fan
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
| | - Shubhra Sinha
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
- Department of Physiology, Heart Otago, School of Biomedical Sciences, University of Otago, 270 Great King Street, P.O. Box 913, Dunedin 9054, New Zealand
| | - Prakash Khadka
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
| | - Shyamal C. Das
- School of Pharmacy, University of Otago, Dunedin 9054, New Zealand
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Verma S, Dal NJK, Srivastava A, Bharti R, Siva Reddy DV, Sofi HS, Roy T, Verma K, Raman SK, Azmi L, Ray L, Mugale MN, Singh AK, Singh J, Griffiths G, Misra A. Inhaled Adjunct Therapy with Second-Line Drug Candidates for Dose Reduction in Chemotherapeutic Regimens for Multi-drug-Resistant Tuberculosis. AAPS PharmSciTech 2023; 24:130. [PMID: 37291443 DOI: 10.1208/s12249-023-02585-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/17/2023] [Indexed: 06/10/2023] Open
Abstract
Chemotherapy of multi-drug-resistant tuberculosis (TB) requires prolonged administration of multiple drugs. We investigated whether pulmonary delivery of minute doses of drugs, along with reduced oral doses of the same agents, would affect preclinical efficacy. We prepared dry powder inhalation (DPI) formulations comprising sutezolid (SUT), the second-generation pretomanid analog TBA-354 (TBA), or a fluorinated derivative of TBA-354 (32,625) in a matrix of the biodegradable polymer poly(L-lactide). We established formulation characteristics, doses inhaled by healthy mice, and preclinical efficacy in a mouse model of TB. Oral doses of 100 mg/kg/day or DPI doses of 0.25-0.5 mg/kg/day of drugs SUT, TBA-354, or 32,625 administered over 28 days were sub-optimally effective in reducing lung and spleen burden of Mycobacterium tuberculosis (Mtb) in infected mice. The addition of 0.25-0.5 mg/kg/day of SUT, TBA-354, or 32,625 as DPI to oral doses of 50 mg/kg/day was non-inferior in clearing Mtb from the lungs of infected mice. We concluded that adjunct therapy with inhaled second-line agents has the potential to reduce the efficacious oral dose.
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Affiliation(s)
- Sonia Verma
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, UP, India
| | | | - Ashish Srivastava
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, UP, India
| | - Reena Bharti
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
| | - D V Siva Reddy
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, UP, India
| | - Hasham Shafi Sofi
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
| | - Trisha Roy
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, UP, India
| | - Khushboo Verma
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, UP, India
| | - Sunil K Raman
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
| | - Lubna Azmi
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
| | - Lipika Ray
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
| | - Madhav N Mugale
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, UP, India
| | - Amit K Singh
- National JALMA Institute for Leprosy and Other Mycobacterial Diseases, Agra, 282004, UP, India
| | - Jyotsna Singh
- CSIR-Indian Institute of Toxicology, Lucknow, 226001, UP, India
| | - Gareth Griffiths
- Department of Biosciences, University of Oslo, 0316, Oslo, Norway.
| | - Amit Misra
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, UP, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, UP, India.
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Next-Generation Diarylquinolines Improve Sterilizing Activity of Regimens with Pretomanid and the Novel Oxazolidinone TBI-223 in a Mouse Tuberculosis Model. Antimicrob Agents Chemother 2023; 67:e0003523. [PMID: 36920217 PMCID: PMC10112056 DOI: 10.1128/aac.00035-23] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
A regimen comprised of bedaquiline (BDQ, or B), pretomanid, and linezolid (BPaL) is the first oral 6-month regimen approved by the U.S. Food and Drug Administration and recommended by the World Health Organization for the treatment of extensively drug-resistant tuberculosis. We used a well-established BALB/c mouse model of tuberculosis to evaluate the treatment-shortening potential of replacing bedaquiline with either of two new, more potent diarylquinolines, TBAJ-587 and TBAJ-876, in early clinical trials. We also evaluated the effect of replacing linezolid with a new oxazolidinone, TBI-223, exhibiting a larger safety margin with respect to mitochondrial toxicity in preclinical studies. Replacing bedaquiline with TBAJ-587 at the same 25-mg/kg dose significantly reduced the proportion of mice relapsing after 2 months of treatment, while replacing linezolid with TBI-223 at the same 100-mg/kg dose did not significantly change the proportion of mice relapsing. Replacing linezolid or TBI-223 with sutezolid in combination with TBAJ-587 and pretomanid significantly reduced the proportion of mice relapsing. In combination with pretomanid and TBI-223, TBAJ-876 at 6.25 mg/kg was equipotent to TBAJ-587 at 25 mg/kg. We conclude that replacement of bedaquiline with these more efficacious and potentially safer diarylquinolines and replacement of linezolid with potentially safer and at least as efficacious oxazolidinones in the clinically successful BPaL regimen may lead to superior regimens capable of treating both drug-susceptible and drug-resistant TB more effectively and safely.
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9
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Xu X, Dong B, Peng L, Gao C, He Z, Wang C, Zeng J. Anti-tuberculosis drug development via targeting the cell envelope of Mycobacterium tuberculosis. Front Microbiol 2022; 13:1056608. [PMID: 36620019 PMCID: PMC9810820 DOI: 10.3389/fmicb.2022.1056608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/25/2022] [Indexed: 12/24/2022] Open
Abstract
Mycobacterium tuberculosis possesses a dynamic cell envelope, which consists of a peptidoglycan layer, a mycolic acid layer, and an arabinogalactan polysaccharide. This envelope possesses a highly complex and unique structure representing a barrier that protects and assists the growth of M. tuberculosis and allows its adaptation to the host. It regulates the immune response of the host cells, causing their damage. Therefore, the cell envelope of M. tuberculosis is an attractive target for vaccine and drug development. The emergence of multidrug-resistant as well as extensively drug resistant tuberculosis and co-infection with HIV prevented an effective control of this disease. Thus, the discovery and development of new drugs is a major keystone for TB treatment and control. This review mainly summarizes the development of drug enzymes involved in the biosynthesis of the cell wall in M. tuberculosis, and other potential drug targets in this pathway, to provide more effective strategies for the development of new drugs.
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Affiliation(s)
- Xinyue Xu
- West China-PUMC CC Chen Institute of Health, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
| | - Baoyu Dong
- West China-PUMC CC Chen Institute of Health, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
| | - Lijun Peng
- West China-PUMC CC Chen Institute of Health, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
| | - Chao Gao
- State Key Laboratory of Biotherapy, Sichuan University, Chengdu, China.,Laboratory of Human Diseases and Immunotherapies, West China Hospital, Sichuan University, Chengdu, China
| | - Zhiqun He
- West China-PUMC CC Chen Institute of Health, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
| | - Chuan Wang
- West China-PUMC CC Chen Institute of Health, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
| | - Jumei Zeng
- West China-PUMC CC Chen Institute of Health, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China
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Fekadu G, Tolossa T, Turi E, Bekele F, Fetensa G. Pretomanid development and its clinical roles in treating tuberculosis. J Glob Antimicrob Resist 2022; 31:175-184. [PMID: 36087906 DOI: 10.1016/j.jgar.2022.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/19/2022] [Accepted: 09/01/2022] [Indexed: 12/30/2022] Open
Abstract
Tuberculosis (TB) is the leading infectious cause of mortality worldwide. Despite the development of different antituberculosis drugs, managing resistant mycobacteria is still challenging. The discovery of novel drugs and new methods of targeted drug delivery have the potential to improve treatment outcomes, lower the duration of treatment, and reduce adverse events. Following bedaquiline and delamanid, pretomanid is the third medicine approved as part of a novel drug regimen for treating drug-resistant TB. It is a promising drug that has the capacity to shape TB treatment and achieve the End TB strategy set by the World Health Organization. The effectiveness of pretomanid has been reported in different observational and clinical studies. However, long-term safety data in humans are not yet available and the pretomanid-based regimen is recommended under an operational research framework that prohibits its wider and programmatic use. Further research is needed before pretomanid can be celebrated as a promising candidate for the treatment of different categories of TB and specific patients. This review covers the update on pretomanid development and its clinical roles in treating Mycobacterium tuberculosis.
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Affiliation(s)
- Ginenus Fekadu
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T, Hong Kong; Department of Pharmacy, Institute of Health Sciences, Wollega University, Nekemte, Ethiopia.
| | - Tadesse Tolossa
- Department of Public Health, Institute of Health Sciences, Wollega University, Nekemte, Ethiopia; Deakin Health Economics, Institute for Health Transformation, Deakin University, Geelong, Victoria
| | - Ebisa Turi
- Department of Public Health, Institute of Health Sciences, Wollega University, Nekemte, Ethiopia; Deakin Health Economics, Institute for Health Transformation, Deakin University, Geelong, Victoria
| | - Firomsa Bekele
- Department of Pharmacy, College of Health Science, Mattu University, Mattu, Ethiopia
| | - Getahun Fetensa
- Department of Nursing, School of Nursing and Midwifery, Institute of Health Sciences, Wollega University, Nekemte, Ethiopia; Department of Health behaviour and Society, Faculty of Public Health, Jimma Medical Center, Jimma University, Ethiopia
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Conradie F, Bagdasaryan TR, Borisov S, Howell P, Mikiashvili L, Ngubane N, Samoilova A, Skornykova S, Tudor E, Variava E, Yablonskiy P, Everitt D, Wills GH, Sun E, Olugbosi M, Egizi E, Li M, Holsta A, Timm J, Bateson A, Crook AM, Fabiane SM, Hunt R, McHugh TD, Tweed CD, Foraida S, Mendel CM, Spigelman M. Bedaquiline-Pretomanid-Linezolid Regimens for Drug-Resistant Tuberculosis. N Engl J Med 2022; 387:810-823. [PMID: 36053506 PMCID: PMC9490302 DOI: 10.1056/nejmoa2119430] [Citation(s) in RCA: 155] [Impact Index Per Article: 77.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND The bedaquiline-pretomanid-linezolid regimen has been reported to have 90% efficacy against highly drug-resistant tuberculosis, but the incidence of adverse events with 1200 mg of linezolid daily has been high. The appropriate dose of linezolid and duration of treatment with this agent to minimize toxic effects while maintaining efficacy against highly drug-resistant tuberculosis are unclear. METHODS We enrolled participants with extensively drug-resistant (XDR) tuberculosis (i.e., resistant to rifampin, a fluoroquinolone, and an aminoglycoside), pre-XDR tuberculosis (i.e., resistant to rifampin and to either a fluoroquinolone or an aminoglycoside), or rifampin-resistant tuberculosis that was not responsive to treatment or for which a second-line regimen had been discontinued because of side effects. We randomly assigned the participants to receive bedaquiline for 26 weeks (200 mg daily for 8 weeks, then 100 mg daily for 18 weeks), pretomanid (200 mg daily for 26 weeks), and daily linezolid at a dose of 1200 mg for 26 weeks or 9 weeks or 600 mg for 26 weeks or 9 weeks. The primary end point in the modified intention-to-treat population was the incidence of an unfavorable outcome, defined as treatment failure or disease relapse (clinical or bacteriologic) at 26 weeks after completion of treatment. Safety was also evaluated. RESULTS A total of 181 participants were enrolled, 88% of whom had XDR or pre-XDR tuberculosis. Among participants who received bedaquiline-pretomanid-linezolid with linezolid at a dose of 1200 mg for 26 weeks or 9 weeks or 600 mg for 26 weeks or 9 weeks, 93%, 89%, 91%, and 84%, respectively, had a favorable outcome; peripheral neuropathy occurred in 38%, 24%, 24%, and 13%, respectively; myelosuppression occurred in 22%, 15%, 2%, and 7%, respectively; and the linezolid dose was modified (i.e., interrupted, reduced, or discontinued) in 51%, 30%, 13%, and 13%, respectively. Optic neuropathy developed in 4 participants (9%) who had received linezolid at a dose of 1200 mg for 26 weeks; all the cases resolved. Six of the seven unfavorable microbiologic outcomes through 78 weeks of follow-up occurred in participants assigned to the 9-week linezolid groups. CONCLUSIONS A total of 84 to 93% of the participants across all four bedaquiline-pretomanid-linezolid treatment groups had a favorable outcome. The overall risk-benefit ratio favored the group that received the three-drug regimen with linezolid at a dose of 600 mg for 26 weeks, with a lower incidence of adverse events reported and fewer linezolid dose modifications. (Funded by the TB Alliance and others; ZeNix ClinicalTrials.gov number, NCT03086486.).
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Affiliation(s)
- Francesca Conradie
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Tatevik R Bagdasaryan
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Sergey Borisov
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Pauline Howell
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Lali Mikiashvili
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Nosipho Ngubane
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Anastasia Samoilova
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Sergey Skornykova
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Elena Tudor
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Ebrahim Variava
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Petr Yablonskiy
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Daniel Everitt
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Genevieve H Wills
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Eugene Sun
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Morounfolu Olugbosi
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Erica Egizi
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Mengchun Li
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Alda Holsta
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Juliano Timm
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Anna Bateson
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Angela M Crook
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Stella M Fabiane
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Robert Hunt
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Timothy D McHugh
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Conor D Tweed
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Salah Foraida
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Carl M Mendel
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
| | - Melvin Spigelman
- From the Clinical HIV Research Unit (F.C., P.H.) and Klerksdorp-Tshepong Hospital Complex, Department of Internal Medicine (E.V.), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, the Clinical HIV Research Unit, King DinuZulu Hospital, Durban (N.N.), and the TB Alliance, Pretoria (M.O.) - all in South Africa; the Central TB Research Institute of the Federal Agency of Scientific Organizations Moscow (T.R.B.), Moscow City Research and Practice Tuberculosis Treatment Center (S.B.), and National Medical Research Center of Phthisiopulmonology and Infectious Diseases (A.S.), Moscow, Ural Research Institute of Phthisiopulmonology, Yekaterinburg (S.S.), and St. Petersburg Research Institute of Phthisiopulmonology, St. Petersburg (P.Y.) - all in Russia; the National Center for Tuberculosis and Lung Disease, Tbilisi, Georgia (L.M.); the Chiril Draganiuc Institute of Phthisiopneumology, Chisinau, Moldova (E.T.); the TB Alliance, New York (D.E., E.S., E.E., M.L., A.H., J.T., S.F., C.M.M., M.S.); and the Medical Research Council Clinical Trials Unit at University College London (G.H.W., A.M.C., S.M.F., C.D.T.) and the University College London Centre for Clinical Microbiology (A.B., R.H., T.D.M.), University College London, London
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Liu Y, Tan Y, Wei G, Lu Z, Liu Y, Yang B, Hui AM, Li K. Safety and pharmacokinetic profile of pretomanid in healthy Chinese adults: Results of a phase I single dose escalation study. Pulm Pharmacol Ther 2022; 73-74:102132. [PMID: 35595003 DOI: 10.1016/j.pupt.2022.102132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 04/27/2022] [Accepted: 05/13/2022] [Indexed: 11/20/2022]
Abstract
We investigated the safety, tolerability and pharmacokinetic (PK) profile of pretomanid (formerly PA-824) in healthy Chinese volunteers. This was a single-center, double-blind, placebo-controlled, phase I dose escalation study, in which healthy volunteers were consecutively allocated to increasing pretomanid dose groups (50, 100, 200, 400, 600, 800, or 1000 mg) and randomized to receive pretomanid or matching placebo. The primary objective was to evaluate the safety, tolerability and PK profile of pretomanid. In total, 306 volunteers were screened, and 60 were assigned to treatment (pretomanid: n = 46, placebo: n = 14) of whom 83.3% were male, age ranged from 19 to 39 years and BMI ranged from 19.2 to 25.9 kg/m2. At least one adverse event (AE) was reported by 67.4% of subjects assigned to pretomanid and 50.0% of those who received placebo, there were no serious AEs or AEs leading to withdrawal. Drug-related events that occurred in ≥5% of participants assigned to pretomanid were proteinuria (26.1%), insignificant microscopic hematuria (15.2%), conjugated hyperbilirubinemia (6.5%), hyperbilirubinemia (6.5%) and elevated uric acid (6.5%). No relationship between pretomanid dose and AEs was observed. In the PK analysis (n = 46), maximum pretomanid plasma concentration was reached in a median of 4 h in all dose groups except 800 mg (12 h) and the plasma half-life ranged from 20.2 to 25.2 h. No dose proportionality was observed for maximum plasma concentration, or area under the plasma concentration curve. In conclusion, single pretomanid doses from 50 to 1000 mg were well tolerated in healthy Chinese participants and the PK profile was generally consistent with findings in non-Chinese populations.
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Affiliation(s)
- Yue Liu
- Clinical Trial Center, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Beijing, China
| | - Yan Tan
- Global R&D Center, Shanghai Fosun Pharmaceutical Development, Co., Ltd, Shanghai, China
| | - Gang Wei
- Global R&D Center, Shanghai Fosun Pharmaceutical Development, Co., Ltd, Shanghai, China
| | - Zhifei Lu
- Global R&D Center, Shanghai Fosun Pharmaceutical Development, Co., Ltd, Shanghai, China
| | - Yazhou Liu
- Shenyang Hongqi Pharmaceutical Co., Ltd, Shenyang, China
| | - Bo Yang
- Shenyang Hongqi Pharmaceutical Co., Ltd, Shenyang, China
| | - Ai-Min Hui
- Global R&D Center, Shanghai Fosun Pharmaceutical Development, Co., Ltd, Shanghai, China.
| | - Kexin Li
- Clinical Trial Center, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Beijing, China.
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Srivastava S, Pasipanodya JG, Heysell SK, Boorgula GD, Gumbo T, McShane PJ, Philley JV. An overview of drugs for the treatment of Mycobacterium kansasii pulmonary disease. J Glob Antimicrob Resist 2022; 28:71-77. [PMID: 34933140 PMCID: PMC8957488 DOI: 10.1016/j.jgar.2021.12.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 12/04/2021] [Accepted: 12/11/2021] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES The aim of this study was to determine and compare the efficacy of drugs to treat Mycobacterium kansasii (Mkn) pulmonary disease by performing minimum inhibitory concentration (MIC) determination and time-kill studies. METHODS We determined the MICs to 13 drugs against the Mkn standard laboratory strain ATCC 12478 and 20 clinical isolates and performed time-kill studies with 18 drugs from different classes using the standard laboratory strain of Mkn. The β-lactam antibiotics were tested with or without the combination of the β-lactamase inhibitor avibactam. An inhibitory sigmoid Emax model was used to describe the relationship between drug concentrations and bacterial burden. RESULTS Among the 13 tested drugs in the MIC experiments, the lowest MIC was recorded for bedaquiline. Among the 18 drugs used in the time-kill studies, maximum kill with cefdinir, tebipenem, clarithromycin, azithromycin, moxifloxacin, levofloxacin, tedizolid, bedaquiline, pretomanid and telacebac was greater than that for some of the drugs (isoniazid, rifampicin and ethambutol) used in standard combination therapy. CONCLUSION We report preclinical data on the efficacy and potency of drugs that can potentially be repurposed to create a safe, effective and likely shorter-duration regimen for the treatment of Mkn pulmonary disease.
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Affiliation(s)
- Shashikant Srivastava
- Department of Pulmonary Immunology, University of Texas at Tyler, Tyler, Texas, USA; Department of Immunology, UT Southwestern Medical Center, Dallas, Texas, USA; Department of Pharmacy Practice, Texas Tech University Health Science Center, Dallas, Texas, USA.
| | - Jotam G Pasipanodya
- Quantitative Preclinical & Clinical Sciences Department, Praedicare Inc., Dallas, Texas, USA
| | - Scott K Heysell
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, USA
| | | | - Tawanda Gumbo
- Quantitative Preclinical & Clinical Sciences Department, Praedicare Inc., Dallas, Texas, USA
| | - Pamela J. McShane
- Section of Pulmonary and Critical Care, University of Texas at Tyler, Tyler, Texas, USA
| | - Julie V. Philley
- Section of Pulmonary and Critical Care, University of Texas at Tyler, Tyler, Texas, USA
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Abstract
Given the low treatment success rates of drug-resistant tuberculosis (TB), novel TB drugs are urgently needed. The landscape of TB treatment has changed considerably over the last decade with the approval of three new compounds: bedaquiline, delamanid and pretomanid. Of these, delamanid and pretomanid belong to the same class of drugs, the nitroimidazoles. In order to close the knowledge gap on how delamanid and pretomanid compare with each other, we summarize the main findings from preclinical research on these two compounds. We discuss the compound identification, mechanism of action, drug resistance, in vitro activity, in vivo pharmacokinetic profiles, and preclinical in vivo activity and efficacy. Although delamanid and pretomanid share many similarities, several differences could be identified. One finding of particular interest is that certain Mycobacterium tuberculosis isolates have been described that are resistant to either delamanid or pretomanid, but with preserved susceptibility to the other compound. This might imply that delamanid and pretomanid could replace one another in certain regimens. Regarding bactericidal activity, based on in vitro and preclinical in vivo activity, delamanid has lower MICs and higher mycobacterial load reductions at lower drug concentrations and doses compared with pretomanid. However, when comparing in vivo preclinical bactericidal activity at dose levels equivalent to currently approved clinical doses based on drug exposure, this difference in activity between the two compounds fades. However, it is important to interpret these comparative results with caution knowing the variability inherent in preclinical in vitro and in vivo models.
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Affiliation(s)
- Saskia E. Mudde
- Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Center, Rotterdam, The Netherlands
- Corresponding author. E-mail:
| | | | - Anne Lenaerts
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO, USA
| | - Hannelore I. Bax
- Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Internal Medicine, Section of Infectious Diseases, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Jurriaan E. M. De Steenwinkel
- Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Center, Rotterdam, The Netherlands
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Pretomanid for tuberculosis treatment: an update for clinical purposes. CURRENT RESEARCH IN PHARMACOLOGY AND DRUG DISCOVERY 2022; 3:100128. [PMID: 36105740 PMCID: PMC9461242 DOI: 10.1016/j.crphar.2022.100128] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 08/16/2022] [Accepted: 09/03/2022] [Indexed: 12/14/2022] Open
Abstract
Coronavirus disease (COVID-19) pandemic determined a 10 years-set back in tuberculosis (TB) control programs. Recent advances in available therapies may help recover the time lost. While Linezolid (LZD) and Bedaquiline (BDQ), previously Group D second line drugs (SLDs) for TB, have been relocated to Group A, other drugs are currently being studied in regimens for drug resistant TB (DR-TB). Among these, Pretomanid (PA), a recently introduced antimycobacterial drug derived from nitroimidazole with both solid bactericidal and bacteriostatic effect, and with an excellent effectiveness and tolerability profile, is in the spotlight. Following promising data obtained from recently published and ongoing randomized controlled trials (RCTs), the World Health Organization (WHO) determined to include PA in its guidelines for the treatment of rifampicin-resistant (RR), multi drug resistant (MDR) and pre-extensively drug resistant TB (pre-XDR-TB) with BDQ, LZD and Moxifloxacine (MFX) in a 6-month regimen. Although further studies on the subject are needed, PA may also represent a treatment option for drug-susceptible TB (DS-TB), latent TB infection (LTBI) and non tuberculous mycobacteria (NTM). This narrative review aims to examine current implementation options and future possibilities for PA in the never-ending fight against TB.
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Comparative Efficacy of the Novel Diarylquinoline TBAJ-876 and Bedaquiline against a Resistant Rv0678 Mutant in a Mouse Model of Tuberculosis. Antimicrob Agents Chemother 2021; 65:e0141221. [PMID: 34570644 PMCID: PMC8597756 DOI: 10.1128/aac.01412-21] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Bedaquiline (BDQ, B) is the first-in-class diarylquinoline to be approved for treatment of tuberculosis (TB). Recent guidelines recommend its use in treatment of multidrug- and extensively drug-resistant tuberculosis (MDR/XDR-TB). The newly approved regimen combining BDQ with pretomanid and linezolid is the first 6-month oral regimen proven to be effective against MDR/XDR-TB. However, the emergence of BDQ resistance, primarily due to inactivating mutations in the Rv0678 gene encoding a repressor of the MmpS5-MmpL5 transporter, threatens to undermine the efficacy of new BDQ-containing regimens. Since the shift in MIC due to these mutations is relatively small (2–8×), safer, and more potent, diarylquinoline analogues may be more effective than BDQ. TBAJ-876, which is in phase 1 trials, has more potent in vitro activity and a superior pre-clinical safety profile than BDQ. Using a murine model of TB, we evaluated the dose-dependent activity of TBAJ-876 compared to BDQ against the wild-type H37Rv strain and an isogenic Rv0678 loss-of-function mutant. Although the mutation affected the MIC of both drugs, the MIC of TBAJ-876 against the mutant was 10-fold lower than that of BDQ. TBAJ-876 at doses ≥6.25 mg/kg had greater efficacy against both strains compared to BDQ at 25 mg/kg, when administered alone or in combination with pretomanid and linezolid. Likewise, no selective amplification of BDQ-resistant bacteria was observed at TBAJ-876 doses ≥6.25 mg/kg. These results indicate that replacing BDQ with TBAJ-876 may shorten the duration of TB treatment and be more effective in treating and preventing infections caused by Rv0678 mutants.
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Fekadu G, To KKW, You JHS. WITHDRAWN: Pretomanid for the treatment of Mycobacterium tuberculosis: Evidence on the development and clinical roles. J Infect Public Health 2021:S1876-0341(21)00324-5. [PMID: 34742640 DOI: 10.1016/j.jiph.2021.09.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 09/04/2021] [Accepted: 09/29/2021] [Indexed: 10/20/2022] Open
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.
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Affiliation(s)
- Ginenus Fekadu
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T, Hong Kong.
| | - Kenneth K W To
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T, Hong Kong.
| | - Joyce H S You
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T, Hong Kong.
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Gils T, Lynen L, de Jong BC, Van Deun A, Decroo T. Pretomanid for tuberculosis: a systematic review. Clin Microbiol Infect 2021; 28:31-42. [PMID: 34400340 DOI: 10.1016/j.cmi.2021.08.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/06/2021] [Accepted: 08/08/2021] [Indexed: 11/03/2022]
Abstract
BACKGROUND Outcomes of treatment of tuberculosis patients with regimens including pretomanid have not yet been systematically reviewed. OBJECTIVES To appraise existing evidence on efficacy and safety of pretomanid in tuberculosis. DATA SOURCES Pubmed, clinicaltrials.gov. and Cochrane library. STUDY ELIGIBILITY CRITERIA Quantitative studies presenting original data on clinical efficacy or safety of pretomanid. PARTICIPANTS Patients with tuberculosis. INTERVENTIONS Treatment with pretomanid or pretomanid-containing regimens in minimum one study group. METHODS Two authors independently extracted data and assessed risk of bias. Data on efficacy (early bactericidal activity, bactericidal activity, end-of-treatment outcomes and acquired resistance) and safety were summarized in tables. Mean differences in efficacy outcomes between regimens across studies were calculated. RESULTS Eight studies were included; four randomized controlled trials on 2-week early bactericidal activity in rifampicin-susceptible tuberculosis, three trials with randomized rifampicin-susceptible tuberculosis arms and a single rifampicin-resistant tuberculosis arm (two on 8-week bactericidal activity, one on end-of-treatment outcomes), one single-arm trial with end-of-treatment outcomes in highly resistant tuberculosis. Activity of pretomanid-moxifloxacin-pyrazinamide was superior to standard treatment on daily change in colony-forming units at days 0-2, 0-56 and 7-56 and time to culture conversion in rifampicin-susceptible tuberculosis (hazard ratio: 1.7; 95% CI 1.1-2.7), but not at end of treatment in one study. This study was stopped due to serious hepatotoxic adverse events, including three deaths, in 4% (95% CI 2-8) patients on pretomanid-moxifloxacin-pyrazinamide and none in controls. In patients with uncomplicated rifampicin-resistant tuberculosis on pretomanid-moxifloxacin-pyrazinamide treatment, 91% (95% CI 59-100) had favourable end-of-treatment outcomes. In patients with highly resistant tuberculosis, 90% (95% CI 83-95) on pretomanid-bedaquiline-linezolid had favourable outcomes six months after treatment, but linezolid-related toxicity was frequent. No acquired resistance to pretomanid was reported. CONCLUSIONS Evidence suggests an important role for pretomanid in rifampicin-resistant and highly resistant tuberculosis. Trials comparing pretomanid to existing core and companion drugs are needed to further define that role.
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Affiliation(s)
- Tinne Gils
- Unit of HIV and Coinfections, Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
| | - Lutgarde Lynen
- Unit of HIV and Coinfections, Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Bouke C de Jong
- Unit of Mycobacteriology, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | | | - Tom Decroo
- Unit of HIV and Coinfections, Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium; Research Foundation Flanders, Brussels, Belgium
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Stancil SL, Mirzayev F, Abdel-Rahman SM. Profiling Pretomanid as a Therapeutic Option for TB Infection: Evidence to Date. Drug Des Devel Ther 2021; 15:2815-2830. [PMID: 34234413 PMCID: PMC8253981 DOI: 10.2147/dddt.s281639] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 05/28/2021] [Indexed: 11/23/2022] Open
Abstract
Tuberculosis (TB) is the most deadly infectious disease globally. Although most individuals achieve a cure, a substantial portion develop multi-drug resistant TB which is exceedingly difficult to treat, and the number of effective agents is dwindling. Development of new anti-tubercular medications is imperative to combat existing drug resistance and accelerate global eradication of TB. Pretomanid (PA-824) represents one of the newest drug classes (ie, nitroimidazooxazines) approved in 2019 by the United States Food and Drug Administration as part of a multi-drug regimen (with bedaquiline and linezolid, BPaL) and recommended by the World Health Organization (WHO) to treat extensively-resistant (XR-TB) and multi-drug resistant tuberculosis (MDR-TB). Approval was granted through the FDA's Limited Population Pathway for Antibacterial and Antifungal Drugs, which accelerates approval for antimicrobial drugs used to treat life-threatening or serious infections in a limited population with unmet need. This review details the pharmacology, efficacy, and safety of this new agent and describes evidence to date for its role in the treatment of drug resistant TB including published, ongoing, and planned studies.
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Affiliation(s)
- Stephani L Stancil
- Division of Adolescent Medicine, Children's Mercy Kansas City, Kansas City, MO, 64108, USA.,Division of Clinical Pharmacology, Toxicology and Therapeutic Innovation, Children's Mercy Kansas City, Kansas City, MO, 64108, USA.,Department of Pediatrics, University of Missouri-Kansas City School of Medicine, Kansas City, MO, 64108, USA
| | | | - Susan M Abdel-Rahman
- Division of Clinical Pharmacology, Toxicology and Therapeutic Innovation, Children's Mercy Kansas City, Kansas City, MO, 64108, USA.,Department of Pediatrics, University of Missouri-Kansas City School of Medicine, Kansas City, MO, 64108, USA
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20
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Srivastava S, Deshpande D, Magombedze G, van Zyl J, Cirrincione K, Martin K, Bendet P, Berg A, Hanna D, Romero K, Hermann D, Gumbo T. Duration of pretomanid/moxifloxacin/pyrazinamide therapy compared with standard therapy based on time-to-extinction mathematics. J Antimicrob Chemother 2021; 75:392-399. [PMID: 31713607 PMCID: PMC6966096 DOI: 10.1093/jac/dkz460] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 09/29/2019] [Accepted: 10/08/2019] [Indexed: 01/13/2023] Open
Abstract
Objectives Animal models have suggested that the combination of pretomanid with pyrazinamide and moxifloxacin (PaMZ) may shorten TB therapy duration to 3–4 months. Here, we tested that in the hollow-fibre system model of TB (HFS-TB). Methods A series of HFS-TB experiments were performed to compare the kill rates of the PaMZ regimen with the standard three-drug combination therapy. HFS-TB experiments were performed with bacilli in log-phase growth treated for 28 days, intracellular bacilli treated daily for 28 days and semi-dormant Mycobacterium tuberculosis treated with daily therapy for 56 days for sterilizing effect. Next, time-to-extinction equations were employed, followed by morphism transformation and Latin hypercube sampling, to determine the proportion of patients who achieved a time to extinction of 3, 4 or 6 months with each regimen. Results Using linear regression, the HFS-TB sterilizing effect rates of the PaMZ regimen versus the standard-therapy regimen during the 56 days were 0.18 (95% credible interval=0.13–0.23) versus 0.15 (95% credible interval=0.08–0.21) log10 cfu/mL/day, compared with 0.16 (95% credible interval=0.13–0.18) versus 0.11 (95% credible interval=0.09–0.13) log10 cfu/mL/day in the Phase II clinical trial, respectively. Using time-to-extinction and Latin hypercube sampling modelling, the expected percentages of patients in which the PaMZ regimen would achieve sterilization were 40.37% (95% credible interval=39.1–41.34) and 72.30% (95% credible interval=71.41–73.17) at 3 and 4 months duration of therapy, respectively, versus 93.67% (95% credible interval=93.18–94.13) at 6 months for standard therapy. Conclusions The kill rates of the PaMZ regimen were predicted to be insufficient to achieve cure in less than 6 months in most patients.
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Affiliation(s)
- Shashikant Srivastava
- Center for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, USA
| | - Devyani Deshpande
- Center for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, USA
| | - Gesham Magombedze
- Center for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, USA
| | - Johanna van Zyl
- Center for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, USA
| | - Kayle Cirrincione
- Center for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, USA
| | | | | | - Alexander Berg
- Critical Path to TB Drug Regimens, Critical Path Institute, Tucson, AZ, USA
| | - Debra Hanna
- Critical Path to TB Drug Regimens, Critical Path Institute, Tucson, AZ, USA.,Bill & Melinda Gates Foundation, Seattle, WA, USA
| | - Klaus Romero
- Critical Path to TB Drug Regimens, Critical Path Institute, Tucson, AZ, USA
| | - Dave Hermann
- Bill & Melinda Gates Foundation, Seattle, WA, USA
| | - Tawanda Gumbo
- Center for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, USA.,Praedicare Laboratories, Dallas, TX, USA.,Lung Infection and Immunity Unit, Division of Pulmonology and UCT Lung Institute, Department of Medicine, University of Cape Town, Cape Town, South Africa
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21
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Chemical Classes Presenting Novel Antituberculosis Agents Currently in Different Phases of Drug Development: A 2010-2020 Review. PHARMACEUTICALS (BASEL, SWITZERLAND) 2021; 14:ph14050461. [PMID: 34068171 PMCID: PMC8152995 DOI: 10.3390/ph14050461] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 01/18/2023]
Abstract
Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb), is a curable airborne disease currently treated using a drug regimen consisting of four drugs. Global TB control has been a persistent challenge for many decades due to the emergence of drug-resistant Mtb strains. The duration and complexity of TB treatment are the main issues leading to treatment failures. Other challenges faced by currently deployed TB regimens include drug-drug interactions, miss-matched pharmacokinetics parameters of drugs in a regimen, and lack of activity against slow replicating sub-population. These challenges underpin the continuous search for novel TB drugs and treatment regimens. This review summarizes new TB drugs/drug candidates under development with emphasis on their chemical classes, biological targets, mode of resistance generation, and pharmacokinetic properties. As effective TB treatment requires a combination of drugs, the issue of drug-drug interaction is, therefore, of great concern; herein, we have compiled drug-drug interaction reports, as well as efficacy reports for drug combinations studies involving antitubercular agents in clinical development.
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Xu J, Converse PJ, Upton AM, Mdluli K, Fotouhi N, Nuermberger EL. Comparative Efficacy of the Novel Diarylquinoline TBAJ-587 and Bedaquiline against a Resistant Rv0678 Mutant in a Mouse Model of Tuberculosis. Antimicrob Agents Chemother 2021; 65:e02418-20. [PMID: 33526488 PMCID: PMC8097419 DOI: 10.1128/aac.02418-20] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/24/2021] [Indexed: 12/15/2022] Open
Abstract
Since its conditional approval in 2012, bedaquiline (BDQ) has been a valuable tool for treatment of drug-resistant tuberculosis. More recently, a novel short-course regimen combining BDQ with pretomanid and linezolid won approval to treat highly drug-resistant tuberculosis. Clinical reports of emerging BDQ resistance have identified mutations in Rv0678 that derepress the expression of the MmpL5/MmpS5 efflux transporter as the most common cause. Because the effect of these mutations on bacterial susceptibility to BDQ is relatively small (e.g., 2 to 8× MIC shift), increasing the BDQ dose would increase antibacterial activity but also pose potential safety concerns, including QTc prolongation. Substitution of BDQ with another diarylquinoline with superior potency and/or safety has the potential to overcome these limitations. TBAJ-587 has greater in vitro potency than BDQ, including against Rv0678 mutants, and may offer a larger safety margin. Using a mouse model of tuberculosis and different doses of BDQ and TBAJ-587, we found that against wild-type M. tuberculosis H37Rv and an isogenic Rv0678 mutant, TBAJ-587 has greater efficacy against both strains than BDQ, whether alone or in combination with pretomanid and either linezolid or moxifloxacin and pyrazinamide. TBAJ-587 also reduced the emergence of resistance to diarylquinolines and pretomanid.
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Affiliation(s)
- Jian Xu
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Paul J Converse
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anna M Upton
- Global Alliance for TB Drug Development, New York, New York, USA
| | - Khisimuzi Mdluli
- Global Alliance for TB Drug Development, New York, New York, USA
| | - Nader Fotouhi
- Global Alliance for TB Drug Development, New York, New York, USA
| | - Eric L Nuermberger
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
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Mori M, Stelitano G, Chiarelli LR, Cazzaniga G, Gelain A, Barlocco D, Pini E, Meneghetti F, Villa S. Synthesis, Characterization, and Biological Evaluation of New Derivatives Targeting MbtI as Antitubercular Agents. Pharmaceuticals (Basel) 2021; 14:155. [PMID: 33668554 PMCID: PMC7918538 DOI: 10.3390/ph14020155] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 01/09/2023] Open
Abstract
Tuberculosis (TB) causes millions of deaths every year, ranking as one of the most dangerous infectious diseases worldwide. Because several pathogenic strains of Mycobacterium tuberculosis (Mtb) have developed resistance against most of the established anti-TB drugs, new therapeutic options are urgently needed. An attractive target for the development of new antitubercular agents is the salicylate synthase MbtI, an essential enzyme for the mycobacterial siderophore biochemical machinery, absent in human cells. A set of analogues of I and II, two of the most potent MbtI inhibitors identified to date, was synthesized, characterized, and tested to elucidate the structural requirements for achieving an efficient MbtI inhibition and a potent antitubercular activity with this class of compounds. The structure-activity relationships (SAR) here discussed evidenced the importance of the furan as part of the pharmacophore and led to the preparation of six new compounds (IV-IX), which gave us the opportunity to examine a hitherto unexplored position of the phenyl ring. Among them emerged 5-(3-cyano-5-(trifluoromethyl)phenyl)furan-2-carboxylic acid (IV), endowed with comparable inhibitory properties to the previous leads, but a better antitubercular activity, which is a key issue in MbtI inhibitor research. Therefore, compound IV offers promising prospects for future studies on the development of novel agents against mycobacterial infections.
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Affiliation(s)
- Matteo Mori
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Giovanni Stelitano
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, via A. Ferrata 9, 27100 Pavia, Italy; (G.S.); (L.R.C.)
| | - Laurent R. Chiarelli
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, via A. Ferrata 9, 27100 Pavia, Italy; (G.S.); (L.R.C.)
| | - Giulia Cazzaniga
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Arianna Gelain
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Daniela Barlocco
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Elena Pini
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Fiorella Meneghetti
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Stefania Villa
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
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Mutations in fbiD ( Rv2983) as a Novel Determinant of Resistance to Pretomanid and Delamanid in Mycobacterium tuberculosis. Antimicrob Agents Chemother 2020; 65:AAC.01948-20. [PMID: 33077652 DOI: 10.1128/aac.01948-20] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 10/07/2020] [Indexed: 11/20/2022] Open
Abstract
The nitroimidazole prodrugs delamanid and pretomanid comprise one of only two new antimicrobial classes approved to treat tuberculosis (TB) in 50 years. Prior in vitro studies suggest a relatively low barrier to nitroimidazole resistance in Mycobacterium tuberculosis, but clinical evidence is limited to date. We selected pretomanid-resistant M. tuberculosis mutants in two mouse models of TB using a range of pretomanid doses. The frequency of spontaneous resistance was approximately 10-5 CFU. Whole-genome sequencing of 161 resistant isolates from 47 mice revealed 99 unique mutations, of which 91% occurred in 1 of 5 genes previously associated with nitroimidazole activation and resistance, namely, fbiC (56%), fbiA (15%), ddn (12%), fgd (4%), and fbiB (4%). Nearly all mutations were unique to a single mouse and not previously identified. The remaining 9% of resistant mutants harbored mutations in Rv2983 (fbiD), a gene not previously associated with nitroimidazole resistance but recently shown to be a guanylyltransferase necessary for cofactor F420 synthesis. Most mutants exhibited high-level resistance to pretomanid and delamanid, although Rv2983 and fbiB mutants exhibited high-level pretomanid resistance but relatively small changes in delamanid susceptibility. Complementing an Rv2983 mutant with wild-type Rv2983 restored susceptibility to pretomanid and delamanid. By quantifying intracellular F420 and its precursor Fo in overexpressing and loss-of-function mutants, we provide further evidence that Rv2983 is necessary for F420 biosynthesis. Finally, Rv2983 mutants and other F420H2-deficient mutants displayed hypersusceptibility to some antibiotics and to concentrations of malachite green found in solid media used to isolate and propagate mycobacteria from clinical samples.
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TB47 and clofazimine form a highly synergistic sterilizing block in a second-line regimen for tuberculosis in mice. Biomed Pharmacother 2020; 131:110782. [PMID: 33152940 DOI: 10.1016/j.biopha.2020.110782] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/23/2020] [Accepted: 09/17/2020] [Indexed: 12/20/2022] Open
Abstract
Multidrug-resistant tuberculosis (MDR-TB) remains a serious public health threat worldwide. To date, the anti-TB activity of TB47 (T), an imidazopyridine amide class of antibiotics targeting QcrB in the electron transport chain, has not been systematically evaluated, especially in a new regimen against MDR-TB. This study employed both macrophage infection and a mouse model to test the activity of T alone or in combination with other antimicrobial agents. Different regimens containing amikacin (A), levofloxacin (L), ethambutol (E), and pyrazinamide (Z) + clofazimine (C)/T were evaluated in the mouse model. The bacterial burdens of mice from different groups were monitored at different time points while relapse was assessed 6 months after treatment cessation. Colonies obtained at relapse underwent drug susceptibility testing. We found that T exhibited highly synergistic bactericidal activity with C in all models. Adding T to ALEZC might shorten the MDR-TB treatment duration from ≥ 9 months to ≤ 5months, as five months of treatment with ALEZCT achieved zero relapse rates in 2 animal experiments. These findings indicate that T exhibits a highly synergistic sterilizing activity when combined with C. All isolates from relapsing mice remained sensitive to each drug, suggesting that the relapse was not due to drug resistance but rather associated with the type of regimen.
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Bigelow KM, Tasneen R, Chang YS, Dooley KE, Nuermberger EL. Preserved Efficacy and Reduced Toxicity with Intermittent Linezolid Dosing in Combination with Bedaquiline and Pretomanid in a Murine Tuberculosis Model. Antimicrob Agents Chemother 2020; 64:e01178-20. [PMID: 32690647 PMCID: PMC7508620 DOI: 10.1128/aac.01178-20] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/15/2020] [Indexed: 11/20/2022] Open
Abstract
The novel regimen of bedaquiline, pretomanid, and linezolid (BPaL) is highly effective against drug-resistant tuberculosis, but linezolid toxicities are frequent. We hypothesized that, for a similar total weekly cumulative dose, thrice-weekly administration of linezolid would preserve efficacy while reducing toxicity compared with daily dosing, in the context of the BPaL regimen. Using C3HeB/FeJ and BALB/c mouse models of tuberculosis disease, thrice-weekly linezolid dosing was compared with daily dosing, with intermittent dosing introduced (i) from treatment initiation or (ii) after an initial period of daily dosing. In all animals, BPa was dosed daily throughout treatment. Blood counts were used to assess hematologic toxicity. After unexpected findings of apparent antagonism, we conducted additional experiments to investigate strain-to-strain differences in the contribution of linezolid to regimen efficacy by comparing each 1- and 2-drug component to the BPaL regimen in BALB/c mice infected with Mycobacterium tuberculosis H37Rv or HN878. Giving linezolid daily for 1 to 2 months achieved the greatest efficacy but, after that, results were similar if the drug was stopped, dosed thrice-weekly, or continued daily. Erythrocyte counts were lower with daily than thrice-weekly dosing. Linezolid had additive effects with BPa against M. tuberculosis H37Rv but antagonistic effects with BPa against M. tuberculosis HN878. However, the overall efficacy of BPaL was high and similar against both strains. Dosing linezolid daily for the first 2 months and then less frequently thereafter may optimize its therapeutic margin. Linezolid's contribution to BPaL regimens may depend on the M. tuberculosis strain.
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Affiliation(s)
- Kristina M Bigelow
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Rokeya Tasneen
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Yong S Chang
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kelly E Dooley
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Eric L Nuermberger
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Pretomanid: A novel therapeutic paradigm for treatment of drug resistant tuberculosis. Indian J Tuberc 2020; 68:106-113. [PMID: 33641829 DOI: 10.1016/j.ijtb.2020.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/16/2020] [Accepted: 09/03/2020] [Indexed: 11/21/2022]
Abstract
Tuberculosis is currently an anticipated driver of pandemic diseases. It remains an imminent issue accounting for about 1.4 million deaths annually across the world. Since the evolution of human entity drug susceptible tuberculosis was managed through potent first line therapies. Unfortunately, the emergence of newer multitude strains refractory amongst available drugs in Drug resistant TB has led to an emergence MDR-TB and XDR-TB. Moreover, the increasing incidence of drug susceptible TB in developing countries paved way to development of new guidelines for treating various form of tuberculosis. Furthermore, newer regimens are warranted to combat resistance that preferably cause a reduction in mortality. Until now, various ongoing trials are being carried in order to potentially evaluate the suitable novel drug candidates, repurposed drugs and host directed therapies that will optimistically be safe, easy to tolerate, cost effective and non-toxic that will modify the prospects for treating drug resistant TB and latent TB. In context, the current scenario seems to impose a significant challenge on health care researchers in the field of drug discovery owing to complexities, prolong treatment duration, and is cumbersome. Pretomanid is a novel drug with potent bactericidal properties emerging a key advancement used in combination along with other drug therapies This review details the role of pretomanid in treating tuberculosis and the clinical trials in adultsd.
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Abstract
After several years of limited success, an effective regimen for the treatment of both drug-sensitive and multiple-drug-resistant tuberculosis is in place. However, this success is still incomplete, as we need several more novel combinations to treat extensively drug-resistant tuberculosis, as well newer emerging resistance. Additionally, the goal of a shortened therapy continues to evade us. A systematic analysis of the tuberculosis drug discovery approaches employed over the last two decades shows that the lead identification path has been largely influenced by the improved understanding of the biology of the pathogen Mycobacterium tuberculosis. Interestingly, the drug discovery efforts can be grouped into a few defined approaches that predominated over a period of time. This review delineates the key drivers during each of these periods. While doing so, the author’s experiences at AstraZeneca R&D, Bangalore, India, on the discovery of new antimycobacterial candidate drugs are used to exemplify the concept. Finally, the review also discusses the value of validated targets, promiscuous targets, the current anti-TB pipeline, the gaps in it, and the possible way forward.
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Abstract
Pretomanid, an oral nitroimidazooxazine antimycobacterial agent administered as part of the BPaL (bedaquiline, pretomanid and linezolid) and BPaMZ (bedaquiline, pretomanid, moxifloxacin and pyrazinamide) regimens, has been developed by the Global Alliance for TB Drug Development (TB Alliance) under license from Novartis, for the treatment for tuberculosis (TB). TB Alliance has licensed Mylan to manufacture and commercialize pretomanid for use as part of the BPaMZ and BPaL regimens. The license is non-exclusive in low- and middle-income countries and exclusive in high-income markets. Pretomanid, as part of the BPaL regimen, was recently approved in the USA under the Limited Population Pathway for Antibacterial and Antifungal Drugs (LPAD) pathway for the treatment of adults with pulmonary extensively drug-resistant (XDR) or treatment-intolerant or non-responsive multidrug-resistant (MDR) TB. Pretomanid is also under regulatory review in the EU. This article summarizes the milestones in the development of pretomanid leading to this first regulatory approval.
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Abstract
Tuberculosis (TB) has now surpassed HIV as the leading infectious cause of death, and treatment success rates are declining. Multidrug-resistant TB, extensively drug-resistant TB, and even totally drug-resistant TB threaten to further destabilize disease control efforts. The second wave in TB drug development, which includes the diarylquinoline, bedaquiline, and the nitroimidazoles delamanid and pretomanid, may offer options for simpler, shorter, and potentially all-oral regimens to treat drug-resistant TB. The "third wave" of TB drug development includes numerous promising compounds, including less toxic versions of older drug classes and candidates with novel mechanisms of action.
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Affiliation(s)
- Elisa H Ignatius
- Department of Medicine, Johns Hopkins University School of Medicine, 1830 Building Room 450B, 1830 East Monument Street, Baltimore, MD 21287, USA
| | - Kelly E Dooley
- Department of Medicine, Center for Tuberculosis Research, Johns Hopkins University School of Medicine, 600 North Wolfe Street, Osler 527, Baltimore, MD, USA.
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Conradie F, Diacon AH, Ngubane N, Howell P, Everitt D, Crook AM, Mendel CM, Egizi E, Moreira J, Timm J, McHugh TD, Wills GH, Bateson A, Hunt R, Van Niekerk C, Li M, Olugbosi M, Spigelman M. Treatment of Highly Drug-Resistant Pulmonary Tuberculosis. N Engl J Med 2020; 382:893-902. [PMID: 32130813 PMCID: PMC6955640 DOI: 10.1056/nejmoa1901814] [Citation(s) in RCA: 448] [Impact Index Per Article: 112.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND Patients with highly drug-resistant forms of tuberculosis have limited treatment options and historically have had poor outcomes. METHODS In an open-label, single-group study in which follow-up is ongoing at three South African sites, we investigated treatment with three oral drugs - bedaquiline, pretomanid, and linezolid - that have bactericidal activity against tuberculosis and to which there is little preexisting resistance. We evaluated the safety and efficacy of the drug combination for 26 weeks in patients with extensively drug-resistant tuberculosis and patients with multidrug-resistant tuberculosis that was not responsive to treatment or for which a second-line regimen had been discontinued because of side effects. The primary end point was the incidence of an unfavorable outcome, defined as treatment failure (bacteriologic or clinical) or relapse during follow-up, which continued until 6 months after the end of treatment. Patients were classified as having a favorable outcome at 6 months if they had resolution of clinical disease, a negative culture status, and had not already been classified as having had an unfavorable outcome. Other efficacy end points and safety were also evaluated. RESULTS A total of 109 patients were enrolled in the study and were included in the evaluation of efficacy and safety end points. At 6 months after the end of treatment in the intention-to-treat analysis, 11 patients (10%) had an unfavorable outcome and 98 patients (90%; 95% confidence interval, 83 to 95) had a favorable outcome. The 11 unfavorable outcomes were 7 deaths (6 during treatment and 1 from an unknown cause during follow-up), 1 withdrawal of consent during treatment, 2 relapses during follow-up, and 1 loss to follow-up. The expected linezolid toxic effects of peripheral neuropathy (occurring in 81% of patients) and myelosuppression (48%), although common, were manageable, often leading to dose reductions or interruptions in treatment with linezolid. CONCLUSIONS The combination of bedaquiline, pretomanid, and linezolid led to a favorable outcome at 6 months after the end of therapy in a high percentage of patients with highly drug-resistant forms of tuberculosis; some associated toxic effects were observed. (Funded by the TB Alliance and others; ClinicalTrials.gov number, NCT02333799.).
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Affiliation(s)
- Francesca Conradie
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Andreas H Diacon
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Nosipho Ngubane
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Pauline Howell
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Daniel Everitt
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Angela M Crook
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Carl M Mendel
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Erica Egizi
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Joanna Moreira
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Juliano Timm
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Timothy D McHugh
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Genevieve H Wills
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Anna Bateson
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Robert Hunt
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Christo Van Niekerk
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Mengchun Li
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Morounfolu Olugbosi
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
| | - Melvin Spigelman
- From the Clinical HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg (F.C., N.N., P.H.), Sizwe Tropical Disease Hospital, Sandringham (F.C., P.H.), Task Applied Science and Stellenbosch University, Cape Town (A.H.D.), King DiniZulu Hospital Complex, Durban (N.N.), and the TB Alliance, Pretoria (C.V.N., M.O.) - all in South Africa; the TB Alliance, New York (D.E., C.M.M., E.E., J.M., J.T., M.L., M.S.); and the MRC Clinical Trials Unit at UCL (A.M.C., G.H.W.) and the UCL Centre for Clinical Microbiology (T.D.M., A.B., R.H.), University College London, London
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Bigelow KM, Deitchman AN, Li SY, Barnes-Boyle K, Tyagi S, Soni H, Dooley KE, Savic RM, Nuermberger EL. Pharmacodynamic Correlates of Linezolid Activity and Toxicity in Murine Models of Tuberculosis. J Infect Dis 2020; 223:1855-1864. [PMID: 31993638 PMCID: PMC8176636 DOI: 10.1093/infdis/jiaa016] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 01/24/2020] [Indexed: 01/21/2023] Open
Abstract
Background Linezolid (LZD) is bactericidal against Mycobacterium tuberculosis, but it has treatment-limiting toxicities. A better understanding of exposure-response relationships governing LZD efficacy and toxicity will inform dosing strategies. Because in vitro monotherapy studies yielded conflicting results, we explored LZD pharmacokinetic/pharmacodynamic (PK/PD) relationships in vivo against actively and nonactively multiplying bacteria, including in combination with pretomanid. Methods Linezolid multidose pharmacokinetics were modeled in mice. Dose-fractionation studies were performed in acute (net bacterial growth) and chronic (no net growth) infection models. In acute models, LZD was administered alone or with bacteriostatic or bactericidal pretomanid doses. Correlations between PK/PD parameters and lung colony-forming units (CFUs) and complete blood counts were assessed. Results Overall, time above minimum inhibitory concentration (T>MIC) correlated best with CFU decline. However, in growth-constrained models (ie, chronic infection, coadministration with pretomanid 50 mg/kg per day), area under the concentration-time curve over MIC (AUC/MIC) had similar explanatory power. Red blood cell counts correlated strongly with LZD minimum concentration (Cmin). Conclusions Although T>MIC was the most consistent correlate of efficacy, AUC/MIC was equally predictive when bacterial multiplication was constrained by host immunity or pretomanid. In effective combination regimens, administering the same total LZD dose less frequently may be equally effective and cause less Cmin-dependent toxicity.
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Affiliation(s)
- Kristina M Bigelow
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Amelia N Deitchman
- University of California San Francisco, Department of Bioengineering and Therapeutic Sciences, San Francisco, California, USA
| | - Si-Yang Li
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kala Barnes-Boyle
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Sandeep Tyagi
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Heena Soni
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kelly E Dooley
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Rada M Savic
- University of California San Francisco, Department of Bioengineering and Therapeutic Sciences, San Francisco, California, USA
| | - Eric L Nuermberger
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Correspondence: Eric Nuermberger, MD, Center for Tuberculosis Research, Department of Medicine/Division of Infectious Diseases, Johns Hopkins University School of Medicine, 1550 Orleans Street, Room 105, Baltimore, Maryland 21231 ()
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Changes in Microbiota and Development of Nonspecific Inflammation of Genitals in Female C57Bl/6 Mice after Aerosol Infection with Mycobacterium tuberculosis. Bull Exp Biol Med 2019; 167:645-649. [PMID: 31625063 DOI: 10.1007/s10517-019-04589-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Indexed: 10/25/2022]
Abstract
Infectious process even at the initial stage after aerosol infection with Mycobacterium tuberculosis induced rapid changes in vaginal microbiota in mice. Rapid decrease in both the quantity and diversity of microbiota was noted, and then, partial recovery of normal flora was observed. Changes in vaginal microbiota was detected as soon as in 3-7 days after lung infection, while inflammatory changes appeared by day 35. At the early stage of infection, no signs of inflammation were observed, neither M. tuberculosis nor its DNA were detected in mouse genital organs.
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Modeling and Simulation of Pretomanid Pharmacodynamics in Pulmonary Tuberculosis Patients. Antimicrob Agents Chemother 2019:AAC.00732-19. [PMID: 31570404 DOI: 10.1128/aac.00732-19] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Pretomanid (PA-824) is a nitroimidazole in clinical testing for the treatment of tuberculosis. A population pharmacodynamic model for pretomanid was developed using a Bayesian analysis of efficacy data from two early bactericidal activity (EBA) studies, PA-824-CL-007 and PA-824-CL-010, conducted in Cape Town, South Africa. The two studies included 122 adult male and female participants with newly diagnosed pulmonary tuberculosis who received once daily oral pretomanid doses of either 50, 100, 150, 200, 600, 1,000, or 1,200 mg for 14 days. The structural model described capacity-limited growth and saturable drug-induced bacterial killing with separate rate equations for sputum solid culture colony forming unit (CFU) counts and liquid culture time to positivity (TTP) that were linked through a time constant. The posterior population geometric means and interindividual variability percent coefficients of variation were, respectively; 0.152±0.013 log10 CFU/mL sputum/day and 54%±6% for the maximum kill rate constant, 20.4±1.0 h and 20.8%±0.1% for the time constant of proportionality between the CFU and TTP rate equations, and 770±140 ng/mL and 48%±17% for the pretomanid half-maximum effect plasma concentration. Model simulations showed once daily pretomanid at 100 mg, 200 mg, and 300 mg, attained 58%, 73%, and 80%, respectively, of an expected maximum 14-day EBA of 0.136 log10CFU/mL sputum/day. These results establish a pretomanid exposure-efficacy relationship with dual outcomes for CFU counts and TTP, and with potential applications to dose optimization of pretomanid-containing regimens.
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Abstract
Background: Tuberculosis is a leading cause of morbidity and mortality in humans worldwide. There is an urgent need for new and effective drugs to treat tuberculosis and shorten the duration of tuberculosis therapy. 1, 25-dihydroxy vitamin D3 (1,25 (OH)2D3) has been reported to have a synergistic effect with pyrazinamide (PZA) in killing tubercle bacilli in vitro. The addition of 1,25 (OH)2D3 to standard tuberculosis treatment should benefit patients if the adjunctive drug has a synergistic effect in vivo. Thus, in this study, calcitriol (bioactive 1,25 (OH)2D3) was administered to mice undergoing treatment for Mycobacterium tuberculosis (M.tb) infection with PZA, a first-line anti-tuberculosis drug, to determine whether vitamin D3 enhances the therapeutic effect. Methods: C57BL/6 female mice were infected with the M.tb H37Rv strain through aerosol exposure. Calcitriol and PZA, either alone or in combination, were orally administered to the M.tb infected mice. The effect of calcitriol on PZA activity was determined by evaluating the bacterial burden and analyzing the histopathological lesions in the lungs and spleen. To investigate the expression of inflammatory cytokines and anti-microbial peptide genes, we determined the transcriptional levels of interferon-γ (IFN-γ), interleukin-4 (IL-4), mouse β-defensin-2 (mBD2), and cathelicidin LL-37 through real-time quantitative polymerase chain reaction. The protein levels of IFN-γ were detected by enzyme-linked immunosorbent assay. Differences between groups were analyzed with independent samples t-test or one-way analysis of variance. Results: Calcitriol alone had little effect on tuberculosis infection, whereas PZA, compared with saline control treatment, decreased the bacterial burden (spleens: PZA vs. saline, 4.82 ± 0.22 vs. 5.22 ± 0.40 Log10 colony-forming units [CFU]/gram, t = 2.13, P < 0.05; lungs: PZA vs. saline, 5.55 ± 0.15 vs. 6.83 ± 0.46 Log10 CFU/gram, t = 6.56, P < 0.01) and pathological lesions in the lungs. Simultaneous administration of calcitriol with PZA, compared with PZA alone, decreased the bacterial load (spleen: calcitriol + PZA vs. PZA, 4.37 ± 0.13 vs. 4.82 ± 0.22 Log10 CFU/gram, t = 4.36, P < 0.01; lung: calcitriol + PZA vs. PZA, 5.03 ± 0.32 vs. 5.55 ± 0.15 Log10 CFU/gram, t = 3.58, P < 0.01) and attenuated the lung lesions (gross pathological score: calcitriol + PZA vs. PZA, 3.25 ± 0.50 vs. 2.50 ± 0.58, t = 1.96, P < 0.05; affected area of total lung area: calcitriol + PZA vs. PZA, 30.75% ± 6.50% vs. 21.55% ± 2.99%, t = 2.66, P < 0.05). Further studies demonstrated calcitriol significantly increased the expression of anti-inflammatory cytokine IL-4 but suppressed production of the pro-inflammatory cytokine IFN-γ (IL-4: calcitriol vs. saline, 5.69 ± 0.50 vs. 2.80 ± 0.56 fold of control, t = 6.74, P < 0.01; IFN-γ: calcitriol vs. saline, 1.36 ± 0.11 vs. 4.13 ± 0.83 fold of control, t = 5.77, P < 0.01). In addition, calcitriol alone or in combination with PZA significantly enhanced the transcriptional level of anti-microbial peptides (cathelicidin LL-37: calcitriol vs. saline, 10.59 ± 1.03 vs. 2.80 ± 0.90 fold of control, t = 9.85, P < 0.01; mBD2: calcitriol vs. saline, 7.92 ± 0.62 vs. 1.79 ± 0.45 fold of control, t = 13.82, P < 0.01), whereas PZA exerted a negative effect on anti-microbial peptide gene expression. Conclusions: Calcitriol as adjunctive treatment can result in beneficial treatment outcomes in M.tb infection by suppressing the inflammatory response and up-regulating the expression of anti-microbial peptides. These results indicate the feasibility of using calcitriol adjunctively with standard chemotherapy for the treatment of M.tb infection.
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Bahuguna A, Rawat DS. An overview of new antitubercular drugs, drug candidates, and their targets. Med Res Rev 2019; 40:263-292. [PMID: 31254295 DOI: 10.1002/med.21602] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 05/16/2019] [Accepted: 05/17/2019] [Indexed: 12/15/2022]
Abstract
The causative agent of tuberculosis (TB), Mycobacterium tuberculosis and more recently totally drug-resistant strains of M. tuberculosis, display unique mechanisms to survive in the host. A four-drug treatment regimen was introduced 40 years ago but the emergence of multidrug-resistance and more recently TDR necessitates the identification of new targets and drugs for the cure of M. tuberculosis infection. The current efforts in the drug development process are insufficient to completely eradicate the TB epidemic. For almost five decades the TB drug development process remained stagnant. The last 10 years have made sudden progress giving some new and highly promising drugs including bedaquiline, delamanid, and pretomanid. Many of the candidates are repurposed compounds, which were developed to treat other infections but later, exhibited anti-TB properties also. Each class of drug has a specific target and a definite mode of action. These targets are either involved in cell wall biosynthesis, protein synthesis, DNA/RNA synthesis, or metabolism. This review discusses recent progress in the discovery of newly developed and Food and Drug Administration approved drugs as well as repurposed drugs, their targets, mode of action, drug-target interactions, and their structure-activity relationship.
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Affiliation(s)
| | - Diwan S Rawat
- Department of Chemistry, University of Delhi, Delhi, India
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Opportunities for Overcoming Mycobacterium tuberculosis Drug Resistance: Emerging Mycobacterial Targets and Host-Directed Therapy. Int J Mol Sci 2019; 20:ijms20122868. [PMID: 31212777 PMCID: PMC6627145 DOI: 10.3390/ijms20122868] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/31/2019] [Accepted: 06/06/2019] [Indexed: 02/08/2023] Open
Abstract
The ever-increasing incidence of drug-resistant Mycobacterium tuberculosis infections has invigorated the focus on the discovery and development of novel treatment options. The discovery and investigation of essential mycobacterial targets is of utmost importance. In addition to the discovery of novel targets, focusing on non-lethal pathways and the use of host-directed therapies has gained interest. These adjunctive treatment options could not only lead to increased antibiotic susceptibility of Mycobacterium tuberculosis, but also have the potential to avoid the emergence of drug resistance. Host-directed therapies, on the other hand, can also reduce the associated lung pathology and improve disease outcome. This review will provide an outline of recent opportunities.
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Xu J, Li SY, Almeida DV, Tasneen R, Barnes-Boyle K, Converse PJ, Upton AM, Mdluli K, Fotouhi N, Nuermberger EL. Contribution of Pretomanid to Novel Regimens Containing Bedaquiline with either Linezolid or Moxifloxacin and Pyrazinamide in Murine Models of Tuberculosis. Antimicrob Agents Chemother 2019; 63:e00021-19. [PMID: 30833432 PMCID: PMC6496099 DOI: 10.1128/aac.00021-19] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 02/25/2019] [Indexed: 11/29/2022] Open
Abstract
Novel regimens combining bedaquiline and pretomanid with either linezolid (BPaL regimen) or moxifloxacin and pyrazinamide (BPaMZ regimen) shorten the treatment duration needed to cure tuberculosis (TB) in BALB/c mice compared to that of the first-line regimen and have yielded promising results in initial clinical trials. However, the independent contribution of the investigational new drug pretomanid to the efficacy of BPaMZ has not been examined, and its contribution to BPaL has been examined only over the first 2 months of treatment. In the present study, the addition of pretomanid to BL increased bactericidal activity, prevented emergence of bedaquiline resistance, and shortened the duration needed to prevent relapse with drug-susceptible isolates by at least 2 months in BALB/c mice. Addition of pretomanid to bedaquiline, moxifloxacin, and pyrazinamide (BMZ) resulted in a 1-log10 greater CFU reduction after 1 month of treatment and/or reduced the number of mice relapsing in each of 2 experiments in BALB/c mice and in immunocompromised nude mice. Bedaquiline-resistant isolates were found at relapse in only one BMZ-treated nude mouse. Treatment of infection with a pyrazinamide-resistant mutant in BALB/c mice with BPaMZ prevented selection of bedaquiline-resistant mutants and reduced the proportion of mice relapsing compared to that for BMZ treatment alone. Among severely ill C3HeB/FeJ mice with caseous pneumonia and cavitation, BPaMZ increased median survival (≥60 versus 21 days) and reduced median lung CFU by 2.4 log10 at 1 month compared to the level for BMZ. In conclusion, in 3 different mouse models, pretomanid contributed significantly to the efficacy of the BPaMZ and BPaL regimens, including restricting the selection of bedaquiline-resistant mutants.
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Affiliation(s)
- Jian Xu
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Beijing Key Laboratory of Drug Resistance Tuberculosis Research, Beijing Tuberculosis and Thoracic Tumor Research Institute, and Beijing Chest Hospital, Capital Medical University, Beijing, China
| | - Si-Yang Li
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Deepak V Almeida
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Rokeya Tasneen
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kala Barnes-Boyle
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Paul J Converse
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anna M Upton
- Global Alliance for Tuberculosis Drug Development, New York, New York, USA
| | - Khisimuzi Mdluli
- Global Alliance for Tuberculosis Drug Development, New York, New York, USA
| | - Nader Fotouhi
- Global Alliance for Tuberculosis Drug Development, New York, New York, USA
| | - Eric L Nuermberger
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
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40
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The changing treatment landscape for MDR/XDR-TB — Can current clinical trials revolutionise and inform a brave new world? Int J Infect Dis 2019; 80S:S23-S28. [DOI: 10.1016/j.ijid.2019.02.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/04/2019] [Accepted: 02/09/2019] [Indexed: 11/17/2022] Open
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The compound TB47 is highly bactericidal against Mycobacterium ulcerans in a Buruli ulcer mouse model. Nat Commun 2019; 10:524. [PMID: 30705268 PMCID: PMC6355801 DOI: 10.1038/s41467-019-08464-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 12/19/2018] [Indexed: 11/16/2022] Open
Abstract
Buruli ulcer (BU) is an emerging infectious disease that causes disfiguring skin ulcers. The causative agent, Mycobacterium ulcerans, secretes toxin called mycolactone that triggers inflammation and immunopathology. Existing treatments are lengthy and consist of drugs developed for tuberculosis. Here, we report that a pyrazolo[1,5-a]pyridine-3-carboxamide, TB47, is highly bactericidal against M. ulcerans both in vitro and in vivo. In the validated mouse model of BU, TB47 alone reduces M. ulcerans burden in mouse footpads by more than 2.5 log10 CFU compared to the standard BU treatment regimen recommended by the WHO. We show that mutations of ubiquinol-cytochrome C reductase cytochrome subunit B confer resistance to TB47 and the dissimilarity of CydABs from different mycobacteria may account for their differences in susceptibility to TB47. TB47 is highly potent against M. ulcerans and possesses desirable pharmacological attributes and low toxicity that warrant further assessment of this agent for treatment of BU. Combination therapy for Buruli ulcer (BU) is suboptimal. Here, Liu et al. show that the candidate drug TB47 has potent bactericidal activity against Mycobacterium ulcerans in vitro and in a mouse model, which underscores its potential for shortening the course of BU and treating other mycobacterial diseases.
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Drug targets exploited in Mycobacterium tuberculosis: Pitfalls and promises on the horizon. Biomed Pharmacother 2018; 103:1733-1747. [PMID: 29864964 DOI: 10.1016/j.biopha.2018.04.176] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 04/24/2018] [Accepted: 04/24/2018] [Indexed: 01/10/2023] Open
Abstract
Tuberculosis is an ever evolving infectious disease that still claims about 1.8 million human lives each year around the globe. Although modern chemotherapy has played a pivotal role in combating TB, the increasing emergence of drug-resistant TB aligned with HIV pandemic threaten its control. This highlights both the need to understand how our current drugs work and the need to develop new and more effective drugs. TB drug discovery is revisiting the clinically validated drug targets in Mycobacterium tuberculosis using whole-cell phenotypic assays in search of better therapeutic scaffolds. Herein, we review the promises of current TB drug regimens, major pitfalls faced, key drug targets exploited so far in M. tuberculosis along with the status of newly discovered drugs against drug resistant forms of TB. New antituberculosis regimens that use lesser number of drugs, require shorter duration of treatment, are equally effective against susceptible and resistant forms of disease, have acceptable toxicity profiles and behave friendly with anti-HIV regimens remains top most priority in TB drug discovery.
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43
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Chang KC, Nuermberger E, Sotgiu G, Leung CC. New drugs and regimens for tuberculosis. Respirology 2018; 23:978-990. [PMID: 29917287 DOI: 10.1111/resp.13345] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 04/17/2018] [Accepted: 05/24/2018] [Indexed: 11/30/2022]
Abstract
Since standardized rifampin-based first-line regimens and fluoroquinolone-based second-line regimens were used to treat tuberculosis (TB), unfortunately without timely modification according to the drug resistance profile, TB and drug-resistant disease are still important public health threats worldwide. Although the last decade has witnessed advances in rapid diagnostic tools and use of repurposed and novel drugs for better managing drug-resistant TB, we need an appropriate TB control strategy and a well-functioning health infrastructure to ensure optimal operational use of rapid tests, judicious use of effective treatment regimens that can be rapidly tailored according to the drug resistance profile and timely management of risk factors and co-morbidities that promote infection and its progression to disease. We searched the published literature to discuss (i) standardized versus individualized therapies, including the choice between a single one-size-fit-all regimen versus different options with different key drugs determined mainly by rapid drug susceptibility testing, (ii) alternative regimens for managing drug-susceptible TB, (iii) evidence for using the World Health Organization (WHO) longer and shorter regimens for multidrug-resistant TB and (iv) evidence for using repurposed and novel drugs. We hope an easily applicable combination of biomarkers that accurately predict individual treatment outcome will soon be available to ultimately guide individualized therapy.
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Affiliation(s)
- Kwok-Chiu Chang
- Department of Health, Tuberculosis and Chest Service, Hong Kong, China
| | - Eric Nuermberger
- Center for Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Giovanni Sotgiu
- Clinical Epidemiology and Medical Statistics Unit, Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Chi-Chiu Leung
- Department of Health, Tuberculosis and Chest Service, Hong Kong, China
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44
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Thompson AM, Bonnet M, Lee HH, Franzblau SG, Wan B, Wong GS, Cooper CB, Denny WA. Antitubercular Nitroimidazoles Revisited: Synthesis and Activity of the Authentic 3-Nitro Isomer of Pretomanid. ACS Med Chem Lett 2017; 8:1275-1280. [PMID: 29259747 PMCID: PMC5733301 DOI: 10.1021/acsmedchemlett.7b00356] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 11/13/2017] [Indexed: 02/08/2023] Open
Abstract
![]()
A published
study of structural features associated with the aerobic
and anaerobic activities of 4- and 5-nitroimidazoles had found that
the 3-nitro isomer of pretomanid, 8, displayed interesting
potencies, including against nitroreductase mutant Mycobacterium
tuberculosis. However, recent nuclear magnetic resonance
analyses of two trace byproducts, isolated from early process optimization
studies toward a large-scale synthesis of pretomanid, raised structural
assignment queries, particularly for 8, stimulating further
investigation. Following our discovery that the reported compound
was a 6-nitroimidazooxazole derivative, we developed a de
novo synthesis of authentic 8 via nitration
of the chiral des-nitro imidazooxazine alcohol 26 in
trifluoroacetic or acetic anhydride, and verified its identity through
an X-ray crystal structure. Unfortunately, 8 displayed
no antitubercular activity (MICs > 128 μM), whereas the second
byproduct (3′-methyl pretomanid) was eight-fold more potent
than pretomanid in the aerobic assay. These findings further clarify
target specificities for bicyclic nitroimidazoles, which may become
important in the event of any future clinical resistance.
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Affiliation(s)
- Andrew M. Thompson
- Auckland
Cancer Society Research Centre, School of Medical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Muriel Bonnet
- Auckland
Cancer Society Research Centre, School of Medical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Ho H. Lee
- Auckland
Cancer Society Research Centre, School of Medical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Scott G. Franzblau
- Institute
for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, United States
| | - Baojie Wan
- Institute
for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, United States
| | - George S. Wong
- Summit CMC Alliance LLC, 61 Hawthorne
Place, Summit, New Jersey 07901, United States
| | - Christopher B. Cooper
- Global Alliance for TB Drug Development, 40 Wall Street, New York, New York 10005, United States
| | - William A. Denny
- Auckland
Cancer Society Research Centre, School of Medical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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Cruz RCDS, Bührer-Sékula S, Penna MLF, Penna GO, Talhari S. Leprosy: current situation, clinical and laboratory aspects, treatment history and perspective of the uniform multidrug therapy for all patients. An Bras Dermatol 2017; 92:761-773. [PMID: 29364430 PMCID: PMC5786388 DOI: 10.1590/abd1806-4841.20176724] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 07/23/2017] [Indexed: 11/25/2022] Open
Abstract
In this review, the most relevant and current epidemiological data, the main clinical, laboratory and therapeutical aspects of leprosy are presented. Detailed discussion of the main drugs used for leprosy treatment, their most relevant adverse effects, evolution of the therapeutic regimen, from dapsone as a monotherapy to the proposed polychemotherapy by World Health Organization (WHO) can be found in this CME. We specifically highlight the drug acceptability, reduction in treatment duration and the most recent proposal of a single therapeutic regimen, with a fixed six months duration, for all clinical presentations, regardless of their classification.
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Affiliation(s)
| | - Samira Bührer-Sékula
- Post-Graduation Program in Tropical Medicine, Instituto de Patologia
Tropical e Saúde Pública, Universidade Federal de Goiás (UFG) -
Goiânia (GO), Brazil
| | - Maria Lúcia F. Penna
- Department of Epidemiology and Statistics, Universidade Federal
Fluminense (UFF) - Niterói (RJ), Brazil
| | - Gerson Oliveira Penna
- Tropical Medicine Center, Universidade de Brasília (UnB) -
Brasília (DF), Brazil
- Escola Fiocruz de Governo, Fundação Oswaldo Cruz
(EFG-Fiocruz) - Brasília (DF), Brazil
| | - Sinésio Talhari
- Discipline of Dermatology, Universidade Nilton Lins - Manaus (AM),
Brazil
- Post-Graduation Program of the Fundação de Medicina
Tropical and Universidade do Estado do Amazonas (UEA/FMT-HVD) - Manaus (AM),
Brazil
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46
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Bhat ZS, Rather MA, Maqbool M, Lah HU, Yousuf SK, Ahmad Z. Cell wall: A versatile fountain of drug targets in Mycobacterium tuberculosis. Biomed Pharmacother 2017; 95:1520-1534. [PMID: 28946393 DOI: 10.1016/j.biopha.2017.09.036] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 09/07/2017] [Accepted: 09/10/2017] [Indexed: 12/18/2022] Open
Abstract
Tuberculosis is the leading infectious disease responsible for an estimated one and a half million human deaths each year around the globe. HIV-TB coinfection and rapid increase in the emergence of drug resistant forms of TB is a dangerous scenario. This underlines the urgent need for new drugs with novel mechanism of action. A plethora of literature exist that highlight the importance of enzymes involved in the biosynthesis of mycobacterial cell wall responsible for its survival, growth, permeability, virulence and resistance to antibiotics. Therefore, assembly of cell wall components is an attractive target for the development of chemotherapeutics against Mycobacterium tuberculosis. The aim of this review is to highlight novel sets of enzyme inhibitors that disrupt its cell wall biosynthetic pathway. These include the currently approved first and second line drugs, candidates in clinical trials and current structure activity guided endeavors of scientific community to identify new potent inhibitors with least cytotoxicity and better efficacy against emergence of drug resistance till date.
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Affiliation(s)
- Zubair Shanib Bhat
- Clinical Microbiology and PK/PD Division, Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India; Academy of Scientific and Innovative Research (AcSIR), CSIR- Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India.
| | - Muzafar Ahmad Rather
- Clinical Microbiology and PK/PD Division, Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India; Department of Biochemistry, University of Kashmir, Srinagar, Jammu & Kashmir 190006, India
| | - Mubashir Maqbool
- Clinical Microbiology and PK/PD Division, Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India; Department of Zoology, University of Kashmir, Srinagar, Jammu & Kashmir 190006, India
| | - Hafiz Ul Lah
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India
| | - Syed Khalid Yousuf
- Academy of Scientific and Innovative Research (AcSIR), CSIR- Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India; Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India
| | - Zahoor Ahmad
- Clinical Microbiology and PK/PD Division, Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India; Academy of Scientific and Innovative Research (AcSIR), CSIR- Indian Institute of Integrative Medicine (IIIM), Campus, Sanat Nagar, Srinagar, Jammu & Kashmir 190005, India.
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47
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Bactericidal and Sterilizing Activity of a Novel Regimen with Bedaquiline, Pretomanid, Moxifloxacin, and Pyrazinamide in a Murine Model of Tuberculosis. Antimicrob Agents Chemother 2017. [PMID: 28630203 PMCID: PMC5571308 DOI: 10.1128/aac.00913-17] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
New regimens based on 2 or more novel agents are sought to shorten or to simplify treatment of tuberculosis (TB), including drug-resistant forms. Prior studies showed that the novel combinations of bedaquiline (BDQ) plus pretomanid (PMD) plus pyrazinamide (PZA) and PMD plus moxifloxacin (MXF) plus PZA shortened the treatment duration necessary to prevent relapse by 2 to 3 months and 1 to 2 months, respectively, compared with the current first-line regimen, in a murine TB model. These 3-drug combinations are now being studied in clinical trials. Here, the 4-drug combination of BDQ+PMD+MXF+PZA was compared to its 3-drug component regimens and different treatment durations of PZA and MXF were explored, to identify the optimal regimens and treatment times and to estimate the likelihood of success against drug-resistant strains. BDQ+PMD+MXF+PZA rendered all mice relapse-free after 2 months of treatment. PZA administration could be discontinued after the first month of treatment without worsening outcomes, whereas the absence of MXF, PZA, or BDQ administration from the beginning necessitated approximately 0.5, 1, or 2 months, respectively, of additional treatment to attain the same outcome.
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48
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Li DG, Ren ZX. Cordyceps sinensis promotes immune regulation and enhances bacteriostatic activity of PA-824 via IL-10 in Mycobacterium tuberculosis disease. ACTA ACUST UNITED AC 2017; 50:e6188. [PMID: 28793052 PMCID: PMC5572845 DOI: 10.1590/1414-431x20176188] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 04/27/2017] [Indexed: 11/22/2022]
Abstract
PA-824 is a novel bicyclic nitroimidazole anti-tuberculosis (TB) drug. Cordyceps sinensis (Berk.) Sacc. (CS) was proven to be a good immunomodulatory compound. This research aimed to investigate the effect of CS on PA-824 in Mycobacterium tuberculosis (M.tb) infected mice (female CBA/J mice, 6 to 8 weeks of age and 20±2 g of weight). Mice were randomly assigned to 4 groups: PA-824, CS, PA-824+CS, and control. To verify the effect of PA-824 and CS on M.tb, after drug administration, mice lungs were harvested and bacterial colony formations were measured. Cells were isolated from infected lungs and spleens to analyze the percentage of CD4+ T cells (CD11a positive). Lung cells were cultured to detect the secretion of interferon-γ (IFN-γ) and interleukin-10 (IL-10) by ELISA. IFN-γ and IL-10 double-positive CD4+ cells in peripheral blood were measured by flow cytometry. The expression levels of IL-2 and IL-10 in mice lungs were analyzed by real-time PCR and western blot. Results showed that PA-824 combined with CS led to the lowest lung colony-forming units (CFU) counts among treated groups. Furthermore, this beneficial outcome might be associated with the decreased CD11a on CD4+ cells in mice lungs and spleens. Moreover, the suppressed secretion of IFN-γ and IL-10, and IL-10 expressions, as well as the decreased IFN-γ and IL-10 double-positive CD4+ cells in blood, could also be associated with the positive effect. However, no significant effect on IL-2 production was found. The combination of PA-824 and CS had more effective bacteriostatic and immunomodulatory effects on M.tb infected mice than PA-824 alone. In conclusion, CS has the potential to be an effective adjuvant in TB treatment.
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Affiliation(s)
- D G Li
- Department of Respiratory Medicine, East Medical District of Linyi People's Hospital, Linyi, Shandong, China
| | - Z X Ren
- Department of Respiratory Medicine, East Medical District of Linyi People's Hospital, Linyi, Shandong, China
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49
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Bhat ZS, Rather MA, Maqbool M, Lah HU, Yousuf SK, Ahmad Z. α-pyrones: Small molecules with versatile structural diversity reflected in multiple pharmacological activities-an update. Biomed Pharmacother 2017; 91:265-277. [PMID: 28460229 DOI: 10.1016/j.biopha.2017.04.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 03/18/2017] [Accepted: 04/10/2017] [Indexed: 12/15/2022] Open
Abstract
The investigations in the chemistry and biology of α-pyrone (2-pyrone) are of vital importance as they constitute an essential pharmacophore in many naturally occurring and biologically active synthetic agents. They are a promising class of biorenewable platform chemicals that provide access to an array of chemical products and intermediates. Literature survey reveals that a simple change in the substitution pattern on the 2-pyrone ring system often leads to diverse biological activities. In this review, we present a brief overview of 2-pyrone pharmacophore followed by highlighting their pharmacological properties and potential applicability till date. Particular attention is focused on the distinctive chemotherapeutic activities of 2-pyrones as anti-HIV, anti-TB and anti-cancer agents followed by their potential role against neurodegeneration, hypercholesterolemia, microbial infections, chronic obstructive lung disease, inflammation, antinociception and immunomodulation. Since 2005, when 2-pyrones came in limelight, their detailed pharmacological activities have been well documented. This review has mainly been prepared on the basis of original reports published in recent two decades with an aim to attract the attention of researchers towards this versatile scaffold for future endeavors that may lead to the development of potential drug candidates against above diseases.
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Affiliation(s)
- Zubair Shanib Bhat
- Clinical Microbiology and PK/PD Division, Council of scientific and industrial research (CSIR) -Indian Institute of Integrative Medicine (IIIM), Sanatnagar, Srinagar, 190005, India; Academy of Scientific and Innovative Research (AcSIR), Indian Institute of Integrative Medicine (CSIR), Sanatnagar Srinagar, Jammu and Kashmir 190005, India
| | - Muzafar Ahmad Rather
- Clinical Microbiology and PK/PD Division, Council of scientific and industrial research (CSIR) -Indian Institute of Integrative Medicine (IIIM), Sanatnagar, Srinagar, 190005, India
| | - Mubashir Maqbool
- Clinical Microbiology and PK/PD Division, Council of scientific and industrial research (CSIR) -Indian Institute of Integrative Medicine (IIIM), Sanatnagar, Srinagar, 190005, India
| | - Hafiz Ul Lah
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar, 190005, India
| | - Syed Khalid Yousuf
- Academy of Scientific and Innovative Research (AcSIR), Indian Institute of Integrative Medicine (CSIR), Sanatnagar Srinagar, Jammu and Kashmir 190005, India; Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar, 190005, India
| | - Zahoor Ahmad
- Clinical Microbiology and PK/PD Division, Council of scientific and industrial research (CSIR) -Indian Institute of Integrative Medicine (IIIM), Sanatnagar, Srinagar, 190005, India; Academy of Scientific and Innovative Research (AcSIR), Indian Institute of Integrative Medicine (CSIR), Sanatnagar Srinagar, Jammu and Kashmir 190005, India.
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50
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Lee BY, Clemens DL, Silva A, Dillon BJ, Masleša-Galić S, Nava S, Ding X, Ho CM, Horwitz MA. Drug regimens identified and optimized by output-driven platform markedly reduce tuberculosis treatment time. Nat Commun 2017; 8:14183. [PMID: 28117835 PMCID: PMC5287291 DOI: 10.1038/ncomms14183] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 12/05/2016] [Indexed: 12/12/2022] Open
Abstract
The current drug regimens for treating tuberculosis are lengthy and onerous, and hence complicated by poor adherence leading to drug resistance and disease relapse. Previously, using an output-driven optimization platform and an in vitro macrophage model of Mycobacterium tuberculosis infection, we identified several experimental drug regimens among billions of possible drug-dose combinations that outperform the current standard regimen. Here we use this platform to optimize the in vivo drug doses of two of these regimens in a mouse model of pulmonary tuberculosis. The experimental regimens kill M. tuberculosis much more rapidly than the standard regimen and reduce treatment time to relapse-free cure by 75%. Thus, these regimens have the potential to provide a markedly shorter course of treatment for tuberculosis in humans. As these regimens omit isoniazid, rifampicin, fluoroquinolones and injectable aminoglycosides, they would be suitable for treating many cases of multidrug and extensively drug-resistant tuberculosis. Current antibiotic therapies for tuberculosis are lengthy and onerous. Here, the authors use an output-driven approach to optimize drug doses for two experimental drug regimens in a mouse model of tuberculosis, leading to improved regimens that reduce treatment time by 75%.
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Affiliation(s)
- Bai-Yu Lee
- Division of Infectious Diseases, Department of Medicine, University of California, Los Angeles, California 90095, USA
| | - Daniel L Clemens
- Division of Infectious Diseases, Department of Medicine, University of California, Los Angeles, California 90095, USA
| | - Aleidy Silva
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, California 90095, USA
| | - Barbara Jane Dillon
- Division of Infectious Diseases, Department of Medicine, University of California, Los Angeles, California 90095, USA
| | - Saša Masleša-Galić
- Division of Infectious Diseases, Department of Medicine, University of California, Los Angeles, California 90095, USA
| | - Susana Nava
- Division of Infectious Diseases, Department of Medicine, University of California, Los Angeles, California 90095, USA
| | - Xianting Ding
- Med-X Research Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Chih-Ming Ho
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, California 90095, USA.,Department of Bioengineering, University of California, Los Angeles, California 90095, USA
| | - Marcus A Horwitz
- Division of Infectious Diseases, Department of Medicine, University of California, Los Angeles, California 90095, USA
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