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Kuldeep J, Sharma SK, Singh BN, Siddiqi MI. Computational exploration and anti-mycobacterial activity of potential inhibitors of Mycobacterium tuberculosis acetyl coenzyme A carboxylase as anti-tubercular agents. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2021; 32:191-205. [PMID: 33612029 DOI: 10.1080/1062936x.2021.1882563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/25/2021] [Indexed: 06/12/2023]
Abstract
Acetyl Coenzyme A Carboxylase (AccD6) is a homodimeric protein which is involved in the carboxylation of acetyl coenzyme A to produce malonyl coenzyme A, which plays an important role in the biosynthesis of fatty acid chain. However, studies suggest that AccD6 in combination with AccA3 produces malonyl co-A. Certain herbicides are known to inhibit plant ACC. Among these herbicides, haloxyfop was found to inhibit AccD6 at IC50 of 21.1 ± 1 µM. In this study, we have performed molecular docking of the Maybridge database consisting of ~55,000 compounds in the active site of the protein with haloxyfop as a reference molecule, followed by molecular dynamics study and biological activity determination of prioritized compounds. Out of the nine compounds selected for biological evaluation, three compounds - CD07230, HTS08529 and KM08871 - were found to exhibit anti-mycobacterial activity.
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Affiliation(s)
- J Kuldeep
- Molecular & Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - S K Sharma
- Microbiology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - B N Singh
- Microbiology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - M I Siddiqi
- Molecular & Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, India
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2
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Kuldeep J, Sharma SK, Sharma T, Singh BN, Siddiqi MI. Targeting Mycobacterium Tuberculosis Enoyl-Acyl Carrier Protein Reductase Using Computational Tools for Identification of Potential Inhibitor and their Biological Activity. Mol Inform 2020; 40:e2000211. [PMID: 33283460 DOI: 10.1002/minf.202000211] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 11/18/2020] [Indexed: 01/07/2023]
Abstract
Enoyl-acyl carrier protein reductase (InhA) of type II fatty acid synthase system is involved in the synthesis of mycolic acids which is a major component of the bacterial cell wall. Since they are the key enzymes playing a very significant role in the FASII pathway of the bacterium. In this study, we have developed a workflow for identification of InhA inhibitors by utilizing in silico virtual screening approaches based on various machine learning algorithms followed by pharmacophore based virtual screening. The hits screened from the models were further subjected to molecular docking. Further, based on the XP docking score best twenty compounds were subjected to molecular dynamics study. Finally, nine compounds were shortlisted on the basis of best stable ligand RMSD, c-alpha RMSD, and RMSF plot for biological evaluation studies. Experimental validation of the shortlisted compounds identified one compound JFD01724 having potent inhibitory activity and was able to inhibit the growth of mycobacterium tuberculosis. Further medicinal chemistry efforts may help to improve the inhibitory potency of the identified compound.
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Affiliation(s)
- Jitendra Kuldeep
- Molecular & Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, India, 226031
| | - Sandeep K Sharma
- Microbiology Division, CSIR-Central Drug Research Institute, Lucknow, India, 226031
| | - Tanuj Sharma
- Molecular & Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, India, 226031
| | - Bhupendra N Singh
- Microbiology Division, CSIR-Central Drug Research Institute, Lucknow, India, 226031
| | - Mohammad Imran Siddiqi
- Molecular & Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, India, 226031
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3
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Oliveira TL, Rizzi C, Dellagostin OA. Recombinant BCG vaccines: molecular features and their influence in the expression of foreign genes. Appl Microbiol Biotechnol 2017; 101:6865-6877. [PMID: 28779291 DOI: 10.1007/s00253-017-8439-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 07/13/2017] [Accepted: 07/15/2017] [Indexed: 01/17/2023]
Abstract
Recombinant Mycobacterium bovis BCG vaccines (rBCG) were first developed in the 1990s as a means of expressing antigens from multiple pathogens. This review examines the key structural factors of recombinant M. bovis that influence the expression of the heterologous antigens and the generation of genetic and functional stability in rBCG, which are crucial for inducing strong and lasting immune responses. The fundamental aim of this paper is to provide an overview of factors that affect the expression of recombinant proteins in BCG and the generation of the immune response against the target antigens, including mycobacterial promoters, location of foreign antigens, and stability of the vectors. The reporter systems that have been employed for evaluation of these molecular features in BCG are also reviewed here.
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Affiliation(s)
- Thaís Larré Oliveira
- Programa de Pós-Graduação em Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Caroline Rizzi
- Programa de Pós-Graduação em Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Odir Antônio Dellagostin
- Programa de Pós-Graduação em Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, RS, Brazil. .,Unidade de Biotecnologia, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Campus Universitário, Caixa Postal 354, Pelotas, RS, CEP 96010-900, Brazil.
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4
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Lu C, Xu W, Shao J, Zhang F, Chen A, Zheng S. Blockade of hedgehog pathway is required for the protective effects of magnesium isoglycyrrhizinate against ethanol-induced hepatocyte steatosis and apoptosis. IUBMB Life 2017; 69:540-552. [DOI: 10.1002/iub.1639] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 04/24/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Chunfeng Lu
- Department of Pharmacology, School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory of Therapeutic Material of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - Wenxuan Xu
- Department of Pharmacology, School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory of Therapeutic Material of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - Jiangjuan Shao
- Department of Pharmacology, School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory of Therapeutic Material of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - Feng Zhang
- Department of Pharmacology, School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory of Therapeutic Material of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - Anping Chen
- Department of Pathology, School of Medicine; Saint Louis University; St Louis MO USA
| | - Shizhong Zheng
- Department of Pharmacology, School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory of Therapeutic Material of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine; Nanjing University of Chinese Medicine; Nanjing Jiangsu China
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5
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Yang D, Ding F, Mitachi K, Kurosu M, Lee RE, Kong Y. A Fluorescent Probe for Detecting Mycobacterium tuberculosis and Identifying Genes Critical for Cell Entry. Front Microbiol 2016; 7:2021. [PMID: 28066347 PMCID: PMC5168438 DOI: 10.3389/fmicb.2016.02021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 12/02/2016] [Indexed: 11/13/2022] Open
Abstract
The conventional method for quantitating Mycobacterium tuberculosis (Mtb) in vitro and in vivo relies on bacterial colony forming unit (CFU) enumeration on agar plates. Due to the slow growth rate of Mtb, it takes 3-6 weeks to observe visible colonies on agar plates. Imaging technologies that are capable of quickly quantitating both active and dormant tubercle bacilli in vitro and in vivo would accelerate research toward the development of anti-TB chemotherapies and vaccines. We have developed a fluorescent probe that can directly label the Mtb cell wall components. The fluorescent probe, designated as DLF-1, has a strong affinity to the D-Ala-D-Ala unit of the late peptidoglycan intermediates in the bacterial cell wall. We demonstrate that DLF-1 is capable of detecting Mtb in both the actively replicating and dormant states in vitro at 100 nM without inhibiting bacterial growth. The DLF-1 fluorescence signal correlated well with CFU of the labeled bacteria (R2 = 1 and 0.99 for actively replicating and dormant Mtb, respectively). DLF-1 can also quantitate labeled Mtb inside of cells. The utility of DLF-1 probe to quantitate Mtb was successfully applied to identify genes critical for cell invasion. In conclusion, this novel near infrared imaging probe provides a powerful new tool for enumerating Mtb with potential future use in bacterial virulence study.
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Affiliation(s)
- Dong Yang
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center Memphis, TN, USA
| | - Feng Ding
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center Memphis, TN, USA
| | - Katsuhiko Mitachi
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center Memphis, TN, USA
| | - Michio Kurosu
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center Memphis, TN, USA
| | - Richard E Lee
- Chemical Biology and Therapeutics Department, St. Jude Children's Research Hospital Memphis, TN, USA
| | - Ying Kong
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center Memphis, TN, USA
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6
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Jin H, Lian N, Zhang F, Bian M, Chen X, Zhang C, Jia Y, Lu C, Hao M, Yao S, Shao J, Wu L, Chen A, Zheng S. Inhibition of YAP signaling contributes to senescence of hepatic stellate cells induced by tetramethylpyrazine. Eur J Pharm Sci 2016; 96:323-333. [PMID: 27717875 DOI: 10.1016/j.ejps.2016.10.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 09/28/2016] [Accepted: 10/02/2016] [Indexed: 12/21/2022]
Abstract
Accumulating evidence indicates that hepatic stellate cells (HSCs) are the central mediators and major effectors in the development of hepatic fibrosis. It is well-known that regulation of cell proliferation and apoptosis are potential strategies to block the activation of HSCs. Recently, several studies have revealed that induction of HSC senescence could prevent and cure the liver fibrosis. In our previous work, we have demonstrated that the natural product tetramethylpyrazine (TMP) could inhibit the activation of HSCs and ameliorate hepatic fibrosis. The aim of this study was to identify a new role of TMP in the regulation of activated HSC senescence and to elucidate the underlying mechanisms. In this study, our data showed that TMP could promote HSC senescence in vivo and in vitro. Moreover, TMP affected the cell cycle and telomerase activity. We further demonstrated that P53 siRNA or P53 pharmacological inhibitor PFT-α abrogated the TMP-induced HSC senescence in vitro. Meanwhile, similar results were obtained in vivo. Further studies indicated that TMP promoted the expression of P53 through a YAP inhibition-dependent mechanism. Moreover, silencing YAP enhanced TMP induction of activated HSC senescence. Collectively, our results suggested that TMP inhibited the activation of HSCs by inducing senescence and had therapeutic implication for the treatment of liver fibrosis.
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Affiliation(s)
- Huanhuan Jin
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Naqi Lian
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Feng Zhang
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Mianli Bian
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xingran Chen
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Chenxi Zhang
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yan Jia
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Chunfeng Lu
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Meng Hao
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Shunyu Yao
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Jiangjuan Shao
- Department of Pharmacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Li Wu
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Anping Chen
- Department of Pathology, School of Medicine, Saint Louis University, MO, USA
| | - Shizhong Zheng
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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7
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Jin H, Lian N, Zhang F, Chen L, Chen Q, Lu C, Bian M, Shao J, Wu L, Zheng S. Activation of PPARγ/P53 signaling is required for curcumin to induce hepatic stellate cell senescence. Cell Death Dis 2016; 7:e2189. [PMID: 27077805 PMCID: PMC4855671 DOI: 10.1038/cddis.2016.92] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 03/06/2016] [Accepted: 03/14/2016] [Indexed: 02/07/2023]
Abstract
Activation of quiescent hepatic stellate cells (HSCs) is the major event in hepatic fibrogenesis, along with enhancement of cell proliferation and overproduction of extracellular matrix. Although inhibition of cell proliferation and induction of apoptosis are potential strategies to block the activation of HSCs, a better understanding of the senescence of activated HSCs can provide a new therapeutic strategy for prevention and treatment of liver fibrosis. The antioxidant curcumin, a phytochemical from turmeric, has been shown to suppress HSC activation in vitro and in vivo. The current work was aimed to evaluate the effect of curcumin on senescence of activated HSCs and to elucidate the underlying mechanisms. In this study, curcumin promoted the expression of senescence marker Hmga1 in rat fibrotic liver. In addition, curcumin increased the number of senescence-associated β-galactosidase-positive HSCs in vitro. At the same time, curcumin induced HSC senescence by elevating the expression of senescence markers P16, P21 and Hmga1, concomitant with reduced abundance of HSC activation markers α-smooth muscle actin and α1(I)-procollagen in cultured HSCs. Moreover, curcumin affected the cell cycle and telomerase activity. We further demonstrated that P53 pharmacological inhibitor pifithrin-α (PFT-α) or transfection with P53 siRNA abrogated the curcumin-induced HSC senescence in vitro. Meanwhile, curcumin disruption of P53 leading to increased senescence of activated HSCs was further verified in vivo. Further studies indicated that curcumin promoted the expression of P53 through a PPARγ activation-dependent mechanism. Moreover, promoting PPARγ transactivating activity by a PPARγ agonist 15d-PGJ2 markedly enhanced curcumin induction of senescence of activated HSCs. However, the PPARγ antagonist PD68235 eliminated curcumin induction of HSC senescence. Taken together, our results provided a novel insight into the mechanisms underlying curcumin inhibition of HSC activation through inducing senescence.
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Affiliation(s)
- H Jin
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - N Lian
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - F Zhang
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.,Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - L Chen
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Q Chen
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - C Lu
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - M Bian
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - J Shao
- Department of Pharmacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - L Wu
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - S Zheng
- Department of Pharmacology, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.,Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China
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8
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Kong Y, Yang D, Cirillo SLG, Li S, Akin A, Francis KP, Maloney T, Cirillo JD. Application of Fluorescent Protein Expressing Strains to Evaluation of Anti-Tuberculosis Therapeutic Efficacy In Vitro and In Vivo. PLoS One 2016; 11:e0149972. [PMID: 26934495 PMCID: PMC4774912 DOI: 10.1371/journal.pone.0149972] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/08/2016] [Indexed: 12/11/2022] Open
Abstract
The slow growth of Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), hinders development of new diagnostics, therapeutics and vaccines. Using non-invasive real-time imaging technologies to monitor the disease process in live animals would facilitate TB research in all areas. We developed fluorescent protein (FP) expressing Mycobacterium bovis BCG strains for in vivo imaging, which can be used to track bacterial location, and to quantify bacterial load in live animals. We selected an optimal FP for in vivo imaging, by first cloning six FPs: tdTomato, mCherry, mPlum, mKate, Katushka and mKeima, into mycobacteria under either a mycobacterial Hsp60 or L5 promoter, and compared their fluorescent signals in vitro and in vivo. Fluorescence from each FP-expressing strain was measured with a multimode reader using the optimal excitation and emission wavelengths for the FP. After normalizing bacterial numbers with optical density, the strain expressing L5-tdTomato displayed the highest fluorescence. We used the tdTomato-labeled M. bovis BCG to obtain real-time images of pulmonary infections in living mice and rapidly determined the number of bacteria present. Further comparison between L5-tdTomato and Hsp60-tdTomato revealed that L5-tdTomato carried four-fold more tdTomato gene copies than Hsp60-tdTomato, which eventually led to higher protein expression of tdTomato. Evaluating anti-TB efficacy of rifampicin and isoniazid therapy in vitro and in vivo using the L5-tdTomato strain demonstrated that this strain can be used to identify anti-TB therapeutic efficacy as quickly as 24 h post-treatment. These M. bovis BCG reporter strains represent a valuable new tool for evaluation of therapeutics, vaccines and virulence.
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Affiliation(s)
- Ying Kong
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Dong Yang
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Suat L. G. Cirillo
- Department of Microbial Pathogenesis and Immunology, Texas A & M Health Science Center, Bryan, Texas, United States of America
| | - Shaoji Li
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Ali Akin
- Caliper Life Sciences, PerkinElmer, Waltham, Massachusetts, United States of America
| | - Kevin P. Francis
- Caliper Life Sciences, PerkinElmer, Waltham, Massachusetts, United States of America
| | - Taylor Maloney
- Department of Microbial Pathogenesis and Immunology, Texas A & M Health Science Center, Bryan, Texas, United States of America
| | - Jeffrey D. Cirillo
- Department of Microbial Pathogenesis and Immunology, Texas A & M Health Science Center, Bryan, Texas, United States of America
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9
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Ozeki Y, Igarashi M, Doe M, Tamaru A, Kinoshita N, Ogura Y, Iwamoto T, Sawa R, Umekita M, Enany S, Nishiuchi Y, Osada-Oka M, Hayashi T, Niki M, Tateishi Y, Hatano M, Matsumoto S. A New Screen for Tuberculosis Drug Candidates Utilizing a Luciferase-Expressing Recombinant Mycobacterium bovis Bacillus Calmette-Guéren. PLoS One 2015; 10:e0141658. [PMID: 26571296 PMCID: PMC4646695 DOI: 10.1371/journal.pone.0141658] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 10/12/2015] [Indexed: 02/04/2023] Open
Abstract
Tuberculosis (TB) is a serious infectious disease caused by a bacterial pathogen. Mortality from tuberculosis was estimated at 1.5 million deaths worldwide in 2013. Development of new TB drugs is needed to not only to shorten the medication period but also to treat multi-drug resistant and extensively drug-resistant TB. Mycobacterium tuberculosis (Mtb) grows slowly and only multiplies once or twice per day. Therefore, conventional drug screening takes more than 3 weeks. Additionally, a biosafety level-3 (BSL-3) facility is required. Thus, we developed a new screening method to identify TB drug candidates by utilizing luciferase-expressing recombinant Mycobacterium bovis bacillus Calmette-Guéren (rBCG). Using this method, we identified several candidates in 4 days in a non-BSL-3 facility. We screened 10,080 individual crude extracts derived from Actinomyces and Streptomyces and identified 137 extracts which possessed suppressive activity to the luciferase of rBCG. Among them, 41 compounds inhibited the growth of both Mtb H37Rv and the extensively drug-resistant Mtb (XDR-Mtb) strains. We purified the active substance of the 1904–1 extract, which possessed strong activity toward rBCG, Mtb H37Rv, and XDR-Mtb but was harmless to the host eukaryotic cells. The MIC of this substance was 0.13 μg/ml, 0.5 μg/ml, and 2.0–7.5 μg/ml against rBCG, H37Rv, and 2 XDR-strains, respectively. Its efficacy was specific to acid-fast bacterium except for the Mycobacterium avium intracellular complex. Mass spectrometry and nuclear magnetic resonance analyses revealed that the active substance of 1904–1 was cyclomarin A. To confirm the mode of action of the 1904-1-derived compound, resistant BCG clones were used. Whole genome DNA sequence analysis showed that these clones contained a mutation in the clpc gene which encodes caseinolytic protein, an essential component of an ATP-dependent proteinase, and the likely target of the active substance of 1904–1. Our method provides a rapid and convenient screen to identify an anti-mycobacterial drug.
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Affiliation(s)
- Yuriko Ozeki
- Department of Bacteriology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
- * E-mail:
| | - Masayuki Igarashi
- Department of Microbiology, Institute of Microbial Chemistry, Microbial Chemistry Research Foundation, Tokyo, Japan
| | - Matsumi Doe
- Graduate School of Sciences, Osaka City University, Osaka, Japan
| | - Aki Tamaru
- Bacteriology Division, Osaka Prefectural Institute of Public Health, Osaka, Japan
| | - Naoko Kinoshita
- Department of Microbiology, Institute of Microbial Chemistry, Microbial Chemistry Research Foundation, Tokyo, Japan
| | - Yoshitoshi Ogura
- Division of Bioenvironmental Science, Frontier Science Research Center, University of Miyazaki, Miyazaki, Japan
| | - Tomotada Iwamoto
- Department of Microbiology, Kobe Institute of Health, Kobe, Japan
| | - Ryuichi Sawa
- Department of Microbiology, Institute of Microbial Chemistry, Microbial Chemistry Research Foundation, Tokyo, Japan
| | - Maya Umekita
- Department of Microbiology, Institute of Microbial Chemistry, Microbial Chemistry Research Foundation, Tokyo, Japan
| | - Shymaa Enany
- Department of Bacteriology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
- Department of Microbiology and Immunology, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
| | - Yukiko Nishiuchi
- Toneyama Institute for Tuberculosis Research, Osaka City University Medical School, Osaka, Japan
| | - Mayuko Osada-Oka
- Food Hygiene and Environmental Health Division of Applied Life Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Tetsuya Hayashi
- Division of Bioenvironmental Science, Frontier Science Research Center, University of Miyazaki, Miyazaki, Japan
| | - Mamiko Niki
- Department of Bacteriology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yoshitaka Tateishi
- Department of Bacteriology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Masaki Hatano
- Department of Microbiology, Institute of Microbial Chemistry, Microbial Chemistry Research Foundation, Tokyo, Japan
| | - Sohkichi Matsumoto
- Department of Bacteriology, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
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10
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Real-time bioluminescence imaging of mixed mycobacterial infections. PLoS One 2014; 9:e108341. [PMID: 25265287 PMCID: PMC4180448 DOI: 10.1371/journal.pone.0108341] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 08/28/2014] [Indexed: 01/18/2023] Open
Abstract
Molecular analysis of infectious processes in bacteria normally involves construction of isogenic mutants that can then be compared to wild type in an animal model. Pathogenesis and antimicrobial studies are complicated by variability between animals and the need to sacrifice individual animals at specific time points. Live animal imaging allows real-time analysis of infections without the need to sacrifice animals, allowing quantitative data to be collected at multiple time points in all organs simultaneously. However, imaging has not previously allowed simultaneous imaging of both mutant and wild type strains of mycobacteria in the same animal. We address this problem by using both firefly (Photinus pyralis) and click beetle (Pyrophorus plagiophthalamus) red luciferases, which emit distinct bioluminescent spectra, allowing simultaneous imaging of two different mycobacterial strains during infection. We also demonstrate that these same bioluminescence reporters can be used to evaluate therapeutic efficacy in real-time, greatly facilitating our ability to screen novel antibiotics as they are developed. Due to the slow growth rate of mycobacteria, novel imaging technologies are a pressing need, since they can they can impact the rate of development of new therapeutics as well as improving our understanding of virulence mechanisms and the evaluation of novel vaccine candidates.
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