1
|
Uddin T, Xia J, Fu Y, McNamara CW, Chatterjee AK, Sibley LD. High Throughput Repurposing Screen Reveals Compounds with Activity Against Toxoplasma gondii Bradyzoites. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.01.601569. [PMID: 39005312 PMCID: PMC11244992 DOI: 10.1101/2024.07.01.601569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Toxoplasma gondii causes widespread chronic infections that are not cured by current treatments due to inability to affect semi-dormant bradyzoite stages within tissue cysts. To identify compounds to eliminate chronic infection, we developed a HTS using a recently characterized strain of T. gondii that undergoes efficient conversion to bradyzoites in intro. Stage-specific expression of luciferase was used to selectively monitor growth inhibition of bradyzoites by the Library of Pharmacological Active Compounds, consisting of 1,280 drug-like compounds. We identified 44 compounds with >50% inhibitory effects against bradyzoites, including new highly potent compounds, several of which have precedent for antimicrobial activity. Subsequent characterization of the compound Sanguinarine sulfate revealed potent and rapid killing against in vitro produced bradyzoites and bradyzoites harvested from chronically infected mice. These findings provide a platform for expanded screening and identify promising compounds for further preclinical development against T. gondii bradyzoites responsible for chronic infection.
Collapse
Affiliation(s)
- Taher Uddin
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Jing Xia
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Yong Fu
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA
| | | | | | - L. David Sibley
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA
| |
Collapse
|
2
|
Yan ZF, Feng CQ, Chen XQ, Jin CX, Xia W, Chen S, Wu J. Design and construction of chemical-biological module clusters for degradation and assimilation of poly(ethylene terephthalate) waste. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 361:121258. [PMID: 38815428 DOI: 10.1016/j.jenvman.2024.121258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 04/11/2024] [Accepted: 05/25/2024] [Indexed: 06/01/2024]
Abstract
The rising accumulation of poly(ethylene terephthalate) (PET) waste presents an urgent ecological challenge, necessitating an efficient and economical treatment technology. Here, we developed chemical-biological module clusters that perform chemical pretreatment, enzymatic degradation, and microbial assimilation for the large-scale treatment of PET waste. This module cluster included (i) a chemical pretreatment that involves incorporating polycaprolactone (PCL) at a weight ratio of 2% (PET:PCL = 98:2) into PET via mechanical blending, which effectively reduces the crystallinity and enhances degradation; (ii) enzymatic degradation using Thermobifida fusca cutinase variant (4Mz), that achieves complete degradation of pretreated PET at 300 g/L PET, with an enzymatic loading of 1 mg protein per gram of PET; and (iii) microbial assimilation, where Rhodococcus jostii RHA1 metabolizes the degradation products, assimilating each monomer at a rate above 90%. A comparative life cycle assessment demonstrated that the carbon emissions from our module clusters (0.25 kg CO2-eq/kg PET) are lower than those from other established approaches. This study pioneers a closed-loop system that seamlessly incorporates pretreatment, degradation, and assimilation processes, thus mitigating the environmental impacts of PET waste and propelling the development of a circular PET economy.
Collapse
Affiliation(s)
- Zheng-Fei Yan
- School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.
| | - Chu-Qi Feng
- School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
| | - Xiao-Qian Chen
- School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
| | - Chang-Xu Jin
- School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
| | - Wei Xia
- School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
| | - Sheng Chen
- School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
| | - Jing Wu
- School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.
| |
Collapse
|
3
|
Pal R, Talwar S, Pandey M, Nain VK, Sharma T, Tyagi S, Barik V, Chaudhary S, Gupta SK, Kumar Y, Nanda R, Singhal A, Pandey AK. Rv0495c regulates redox homeostasis in Mycobacterium tuberculosis. Tuberculosis (Edinb) 2024; 145:102477. [PMID: 38211498 DOI: 10.1016/j.tube.2024.102477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/18/2023] [Accepted: 01/05/2024] [Indexed: 01/13/2024]
Abstract
Mycobacterium tuberculosis (Mtb) has evolved sophisticated surveillance mechanisms to neutralize the ROS-induces toxicity which otherwise would degrade a variety of biological molecules including proteins, nucleic acids and lipids. In the present study, we find that Mtb lacking the Rv0495c gene (ΔRv0495c) is presented with a highly oxidized cytosolic environment. The superoxide-induced lipid peroxidation resulted in altered colony morphology and loss of membrane integrity in ΔRv0495c. As a consequence, ΔRv0495c demonstrated enhanced susceptibility when exposed to various host-induced stress conditions. Further, as expected, we observed a mutant-specific increase in the abundance of transcripts that encode proteins involved in antioxidant defence. Surprisingly, despite showing a growth defect phenotype in macrophages, the absence of the Rv0495c enhanced the pathogenicity and augmented the ability of the Mtb to grow inside the host. Additionally, our study revealed that Rv0495c-mediated immunomodulation by the pathogen helps create a favorable niche for long-term survival of Mtb inside the host. In summary, the current study underscores the fact that the truce in the war between the host and the pathogen favours long-term disease persistence in tuberculosis. We believe targeting Rv0495c could potentially be explored as a strategy to potentiate the current anti-TB regimen.
Collapse
Affiliation(s)
- Rahul Pal
- Mycobacterial Pathogenesis Laboratory, Centre for Tuberculosis Research, Translational Health Science and Technology Institute, Faridabad, Haryana, India
| | - Sakshi Talwar
- Mycobacterial Pathogenesis Laboratory, Centre for Tuberculosis Research, Translational Health Science and Technology Institute, Faridabad, Haryana, India
| | - Manitosh Pandey
- Mycobacterial Pathogenesis Laboratory, Centre for Tuberculosis Research, Translational Health Science and Technology Institute, Faridabad, Haryana, India
| | - Vaibhav Kumar Nain
- Mycobacterial Pathogenesis Laboratory, Centre for Tuberculosis Research, Translational Health Science and Technology Institute, Faridabad, Haryana, India; Jawaharlal Nehru University, New Delhi, India
| | - Taruna Sharma
- Mycobacterial Pathogenesis Laboratory, Centre for Tuberculosis Research, Translational Health Science and Technology Institute, Faridabad, Haryana, India; Jawaharlal Nehru University, New Delhi, India
| | - Shaifali Tyagi
- Mycobacterial Pathogenesis Laboratory, Centre for Tuberculosis Research, Translational Health Science and Technology Institute, Faridabad, Haryana, India; Jawaharlal Nehru University, New Delhi, India
| | - Vishawjeet Barik
- Mycobacterial Pathogenesis Laboratory, Centre for Tuberculosis Research, Translational Health Science and Technology Institute, Faridabad, Haryana, India; Jawaharlal Nehru University, New Delhi, India
| | - Shweta Chaudhary
- Translational Health Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Sonu Kumar Gupta
- Non-communicable Disease Centre, Translational Health Science and Technology Institute, Faridabad, Haryana, India
| | - Yashwant Kumar
- Non-communicable Disease Centre, Translational Health Science and Technology Institute, Faridabad, Haryana, India
| | - Ranjan Nanda
- Translational Health Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Amit Singhal
- Infectious Diseases Labs (ID Labs), Agency for Science Technology and Research (A*STAR), Singapore, 138648, Republic of Singapore; Singapore Immunology Network (SIgN), A*STAR, Singapore, 138648, Republic of Singapore
| | - Amit Kumar Pandey
- Mycobacterial Pathogenesis Laboratory, Centre for Tuberculosis Research, Translational Health Science and Technology Institute, Faridabad, Haryana, India.
| |
Collapse
|
4
|
Pellegrino E, Aylan B, Bussi C, Fearns A, Bernard EM, Athanasiadi N, Santucci P, Botella L, Gutierrez MG. Peroxisomal ROS control cytosolic Mycobacterium tuberculosis replication in human macrophages. J Cell Biol 2023; 222:e202303066. [PMID: 37737955 PMCID: PMC10515436 DOI: 10.1083/jcb.202303066] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 07/27/2023] [Accepted: 09/07/2023] [Indexed: 09/23/2023] Open
Abstract
Peroxisomes are organelles involved in many metabolic processes including lipid metabolism, reactive oxygen species (ROS) turnover, and antimicrobial immune responses. However, the cellular mechanisms by which peroxisomes contribute to bacterial elimination in macrophages remain elusive. Here, we investigated peroxisome function in iPSC-derived human macrophages (iPSDM) during infection with Mycobacterium tuberculosis (Mtb). We discovered that Mtb-triggered peroxisome biogenesis requires the ESX-1 type 7 secretion system, critical for cytosolic access. iPSDM lacking peroxisomes were permissive to Mtb wild-type (WT) replication but were able to restrict an Mtb mutant missing functional ESX-1, suggesting a role for peroxisomes in the control of cytosolic but not phagosomal Mtb. Using genetically encoded localization-dependent ROS probes, we found peroxisomes increased ROS levels during Mtb WT infection. Thus, human macrophages respond to the infection by increasing peroxisomes that generate ROS primarily to restrict cytosolic Mtb. Our data uncover a peroxisome-controlled, ROS-mediated mechanism that contributes to the restriction of cytosolic bacteria.
Collapse
Affiliation(s)
- Enrica Pellegrino
- Host-pathogen interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, UK
| | - Beren Aylan
- Host-pathogen interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, UK
| | - Claudio Bussi
- Host-pathogen interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, UK
| | - Antony Fearns
- Host-pathogen interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, UK
| | - Elliott M. Bernard
- Host-pathogen interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, UK
| | - Natalia Athanasiadi
- Host-pathogen interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, UK
| | - Pierre Santucci
- Host-pathogen interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, UK
| | - Laure Botella
- Host-pathogen interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, UK
| | | |
Collapse
|
5
|
Meyer CT, Lynch GK, Stamo DF, Miller EJ, Chatterjee A, Kralj JM. A high-throughput and low-waste viability assay for microbes. Nat Microbiol 2023; 8:2304-2314. [PMID: 37919425 PMCID: PMC10686820 DOI: 10.1038/s41564-023-01513-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 10/03/2023] [Indexed: 11/04/2023]
Abstract
Counting viable cells is a universal practice in microbiology. The colony-forming unit (CFU) assay has remained the gold standard to measure viability across disciplines, but it is time-intensive and resource-consuming. Here we describe the geometric viability assay (GVA) that replicates CFU measurements over 6 orders of magnitude while reducing over 10-fold the time and consumables required. GVA computes a sample's viable cell count on the basis of the distribution of embedded colonies growing inside a pipette tip. GVA is compatible with Gram-positive and Gram-negative planktonic bacteria (Escherichia coli, Pseudomonas aeruginosa and Bacillus subtilis), biofilms and fungi (Saccharomyces cerevisiae). Laborious CFU experiments such as checkerboard assays, treatment time-courses and drug screens against slow-growing cells are simplified by GVA. The ease and low cost of GVA evinces that it can replace existing viability assays and enable viability measurements at previously impractical scales.
Collapse
Affiliation(s)
- Christian T Meyer
- Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA.
- Chemical and Biological Engineering, University of Colorado Boulder, Boulder, CO, USA.
- Antimicrobial Regeneration Consortium (ARC) Labs, Louisville, CO, USA.
- Duet Biosystems, Nashville, CO, USA.
| | - Grace K Lynch
- Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
| | - Dana F Stamo
- Chemical and Biological Engineering, University of Colorado Boulder, Boulder, CO, USA
- Antimicrobial Regeneration Consortium (ARC) Labs, Louisville, CO, USA
| | - Eugene J Miller
- Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA
| | - Anushree Chatterjee
- Chemical and Biological Engineering, University of Colorado Boulder, Boulder, CO, USA.
- Antimicrobial Regeneration Consortium (ARC) Labs, Louisville, CO, USA.
- Sachi Bio, Louisville, CO, USA.
| | - Joel M Kralj
- Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder, CO, USA.
- Think Bioscience, Boulder, CO, USA.
| |
Collapse
|
6
|
Ahmed S, Mital A, Akhir A, Saxena D, Ahmad MN, Dasgupta A, Chopra S, Jain R. Pyrrole-thiazolidinone hybrids as a new structural class of broad-spectrum anti-infectives. Eur J Med Chem 2023; 260:115757. [PMID: 37659197 DOI: 10.1016/j.ejmech.2023.115757] [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: 07/12/2023] [Revised: 08/16/2023] [Accepted: 08/23/2023] [Indexed: 09/04/2023]
Abstract
A series of pyrrole-thiazolidinone hybrids was designed, synthesized and evaluated for activities against ESKAP bacteria panel and mycobacterial pathogens. From the series, compound 9d showed prominent activity against S. aureus (MIC = 0.5 μg/mL) and compound 9k showed the most promising activity against M. tuberculosis H37Rv (MIC = 0.5 μg/mL). Potent derivatives were found to be non-toxic when tested against Vero cells. Compound 9d upon evaluation in vitro against several MRSA and VRSA strains produced activity comparable or better than standard drugs. In the anti-biofilm assay, 9d reduced S. aureus biofilm by >11% at 10x MIC. The dual inhibitory effect exhibited by pyrrole-thiazolidinone hybrids confirms their potential as new class of promising anti-infective agents.
Collapse
Affiliation(s)
- Shujauddin Ahmed
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Sector 67, S.A.S. Nagar, Punjab, 160 062, India
| | - Alka Mital
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Sector 67, S.A.S. Nagar, Punjab, 160 062, India
| | - Abdul Akhir
- Division of Molecular Microbiology and Immunology, Central Drug Research Institute (CSIR-CDRI), Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226 031, India
| | - Deepanshi Saxena
- Division of Molecular Microbiology and Immunology, Central Drug Research Institute (CSIR-CDRI), Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226 031, India
| | - Mohammad Naiyaz Ahmad
- Division of Molecular Microbiology and Immunology, Central Drug Research Institute (CSIR-CDRI), Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226 031, India
| | - Arunava Dasgupta
- Division of Molecular Microbiology and Immunology, Central Drug Research Institute (CSIR-CDRI), Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226 031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Sidharth Chopra
- Division of Molecular Microbiology and Immunology, Central Drug Research Institute (CSIR-CDRI), Sector 10, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226 031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India.
| | - Rahul Jain
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Sector 67, S.A.S. Nagar, Punjab, 160 062, India.
| |
Collapse
|
7
|
Kumari P, Kaul G, Kumar TA, Akhir A, Shukla M, Sharma S, Kamat SS, Chopra S, Chakrapani H. Heterocyclic Diaryliodonium-Based Inhibitors of Carbapenem-Resistant Acinetobacter baumannii. Microbiol Spectr 2023; 11:e0477322. [PMID: 36976008 PMCID: PMC10101131 DOI: 10.1128/spectrum.04773-22] [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: 11/22/2022] [Accepted: 03/08/2023] [Indexed: 03/29/2023] Open
Abstract
Finding new therapeutic strategies against Gram-negative pathogens such as Acinetobacter baumannii is challenging. Starting from diphenyleneiodonium (dPI) salts, which are moderate Gram-positive antibacterials, we synthesized a focused heterocyclic library and found a potent inhibitor of patient-derived multidrug-resistant Acinetobacter baumannii strains that significantly reduced bacterial burden in an animal model of infection caused by carbapenem-resistant Acinetobacter baumannii (CRAB), listed as a priority 1 critical pathogen by the World Health Organization. Next, using advanced chemoproteomics platforms and activity-based protein profiling (ABPP), we identified and biochemically validated betaine aldehyde dehydrogenase (BetB), an enzyme that is involved in the metabolism and maintenance of osmolarity, as a potential target for this compound. Together, using a new class of heterocyclic iodonium salts, a potent CRAB inhibitor was identified, and our study lays the foundation for the identification of new druggable targets against this critical pathogen. IMPORTANCE Discovery of novel antibiotics targeting multidrug-resistant (MDR) pathogens such as A. baumannii is an urgent, unmet medical need. Our work has highlighted the potential of this unique scaffold to annihilate MDR A. baumannii alone and in combination with amikacin both in vitro and in animals, that too without inducing resistance. Further in depth analysis identified central metabolism to be a putative target. Taken together, these experiments lay down the foundation for effective management of infections caused due to highly MDR pathogens.
Collapse
Affiliation(s)
- Pooja Kumari
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Pune, Maharashtra, India
| | - Grace Kaul
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - T. Anand Kumar
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Pune, Maharashtra, India
| | - Abdul Akhir
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Manjulika Shukla
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Suraj Sharma
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Pune, Maharashtra, India
| | - Siddhesh S. Kamat
- Department of Biology, Indian Institute of Science Education and Research Pune, Pune, Maharashtra, India
| | - Sidharth Chopra
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Harinath Chakrapani
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Pune, Maharashtra, India
| |
Collapse
|
8
|
Serendipitous identification of phenylhydrazine derivatives as potent inhibitors of carbapenem-resistant Acinetobacter baumannii. Future Med Chem 2022; 14:1621-1634. [PMID: 36326019 DOI: 10.4155/fmc-2022-0156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Background: In the authors' previous study, 4-(2-((3-methyl-4-oxo-2-thioxo/dioxothiazolidin-5-ylidene) methyl) hydrazineyl) benzonitriles were found to demonstrate potent antibacterial activity against Acinetobacter baumannii. Interestingly, the aforementioned compounds contain a 4-cyanophenylhydrazine motif. Materials & methods: Intrigued by this observation, the authors focused on preparing a library of 4-cyanophenylhydrazine derivatives and studied their detailed antibacterial potential. Results: This study led to the identification of a 4-cyanophenylhydrazine with potent inhibitory activity against carbapenem-resistant A. baumannii BAA-1605, with minimum inhibitory concentration (MIC) of 0.25 μg/ml and highest selectivity index of 640. The compound also demonstrated potent inhibition against multidrug-resistant A. baumannii isolates (MIC: 0.25-1 μg/ml). Conclusion: The identified 4-cyanophenylhydrazine compound exhibited synergistic activity with amikacin, tobramycin and polymyxin B against carbapenem-resistant A. baumannii BAA-1605.
Collapse
|
9
|
Akunuri R, M TU, Kaul G, Akhir A, Saxena D, Wajidali M, Veerareddy V, Yaddanapudi VM, Chopra S, Nanduri S. Synthesis and Antibacterial evaluation of Rhodanine and Its related heterocyclic compounds against S. aureus and A. baumannii. Chem Biodivers 2022; 19:e202200213. [PMID: 35714172 DOI: 10.1002/cbdv.202200213] [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: 03/09/2022] [Accepted: 06/17/2022] [Indexed: 11/10/2022]
Abstract
Antimicrobial resistance is a serious challenge to modern medicine. Besides imposing high financial burden, multidrug resistant infections are directly responsible for high morbidity and mortality. Even though a number of antibiotics are currently available to treat infections caused by ESKAPE organisms, more and more bacterial strains are becoming resistant to these drugs. In these circumstances, there is an urgent unmet need for development of newer antimicrobials to treat the infections caused due to MDR organisms. Rhodanine and structurally related 5-membered heterocycles possess wide range of pharmacological activities. A number of these derivatives have shown good to potent inhibition against the various microorganisms. They are reported to alter the functions of DNA gyrase B, metallo-β-lactamases, pencilline binding protein (PBP), Mur ligases, RNA polymerase, Enoyl ACP reductases, 1-deoxy-d-xylulose-5-phosphate reductoisomerase. etc which are vital molecular targets involved in bacterial growth, survival and replication. In this study, we have generated a library of Rhodanine and related 5 membered heterocyclic derivatives and screened them against a panel of pathogens. Among all the compounds, 2a-i, 3a-b, 3g, 4, 6b-c, 6e, 6g, 12a-b and 14b-c have demonstrated good to moderate inhibition against S. aureus (MIC 0.125-8 µ g/mL). Further, compound 17b demonstrated moderate activity against A. baumannii (MIC 8 µ g/mL). In addition, compounds 2a, 2e, 4, 6c, 6g and 14b have shown good to mild inhibition against MDR S. aureus including VRSA (MIC 0.5-16 µ g/mL) with good selectivity index 20-1600. In addition, compound 2e has inhibited growth gradually after 6 h in time kill kinetic studies and not antagonized with the tested FDA approved drugs.
Collapse
Affiliation(s)
- Ravikumar Akunuri
- National Institute of Pharmaceutical Education and Research Hyderabad, Department Of Chemical Sciences, Balanagar, Hyderabad, INDIA
| | - Tanveer Unnissa M
- National Institute of Pharmaceutical Education and Research Hyderabad, Department of Chemical Sciences, Balanagar, Hyderabad, INDIA
| | - Grace Kaul
- CSIR-CDRI: Central Drug Research Institute, Division of Molecular Microbiology and Immunology, CDRI, Luknow, INDIA
| | - Abdul Akhir
- CSIR-CDRI: Central Drug Research Institute, Division of Molecular Microbiology and Immunology, CDRI, Luknow, INDIA
| | - Deepanshi Saxena
- CSIR-CDRI: Central Drug Research Institute, Division of Molecular Microbiology and Immunology, CDRI, Luknow, INDIA
| | - Mohmadd Wajidali
- National Institute of Pharmaceutical Education and Research Hyderabad, Department Of Chemical Sciences, Balanagar, Hyderabad, INDIA
| | - Vaishnavi Veerareddy
- National Institute of Pharmaceutical Education and Research Hyderabad, Department of Chemical Sciences, Balanagar, Hyderabad, INDIA
| | - Venkata Madhavi Yaddanapudi
- National Institute of Pharmaceutical Education and Research Hyderabad, Department of Chemical Sciences, Balanagar, Hyderabad, INDIA
| | - Sidharth Chopra
- CSIR-CDRI: Central Drug Research Institute, Division of Molecular Microbiology and Immunology, CDRI, Luknow, INDIA
| | - Srinivas Nanduri
- National Institute of Pharmaceutical Education and Research Hyderabad, Process Chemistry, Balanagar, 500037, Hyderabad, INDIA
| |
Collapse
|
10
|
Mamtimin M, Pinarci A, Han C, Braun A, Anders HJ, Gudermann T, Mammadova-Bach E. Extracellular DNA Traps: Origin, Function and Implications for Anti-Cancer Therapies. Front Oncol 2022; 12:869706. [PMID: 35574410 PMCID: PMC9092261 DOI: 10.3389/fonc.2022.869706] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/07/2022] [Indexed: 12/16/2022] Open
Abstract
Extracellular DNA may serve as marker in liquid biopsies to determine individual diagnosis and prognosis in cancer patients. Cell death or active release from various cell types, including immune cells can result in the release of DNA into the extracellular milieu. Neutrophils are important components of the innate immune system, controlling pathogens through phagocytosis and/or the release of neutrophil extracellular traps (NETs). NETs also promote tumor progression and metastasis, by modulating angiogenesis, anti-tumor immunity, blood clotting and inflammation and providing a supportive niche for metastasizing cancer cells. Besides neutrophils, other immune cells such as eosinophils, dendritic cells, monocytes/macrophages, mast cells, basophils and lymphocytes can also form extracellular traps (ETs) during cancer progression, indicating possible multiple origins of extracellular DNA in cancer. In this review, we summarize the pathomechanisms of ET formation generated by different cell types, and analyze these processes in the context of cancer. We also critically discuss potential ET-inhibiting agents, which may open new therapeutic strategies for cancer prevention and treatment.
Collapse
Affiliation(s)
- Medina Mamtimin
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany.,Division of Nephrology, Department of Medicine IV, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Akif Pinarci
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany
| | - Chao Han
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany.,Division of Nephrology, Department of Medicine IV, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Attila Braun
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany
| | - Hans-Joachim Anders
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany.,Division of Nephrology, Department of Medicine IV, Ludwig-Maximilians-University Hospital, Munich, Germany
| | - Thomas Gudermann
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany.,German Center for Lung Research, Munich, Germany
| | - Elmina Mammadova-Bach
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University, Munich, Germany.,Division of Nephrology, Department of Medicine IV, Ludwig-Maximilians-University Hospital, Munich, Germany
| |
Collapse
|
11
|
Choudhury M, Bindra HS, Singh K, Singh AK, Nayak R. Antimicrobial polymeric composites in consumer goods and healthcare sector: A healthier way to prevent infection. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5660] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mousam Choudhury
- Amity Institute of Nanotechnology Amity University Uttar Pradesh Noida India
| | | | - Karishma Singh
- Amity Institute of Nanotechnology Amity University Uttar Pradesh Noida India
| | - Alok Kumar Singh
- School of Biotechnology Sher‐e‐Kashmir University of Agricultural Science and Technology of Jammu Jammu and Kashmir India
| | - Ranu Nayak
- Amity Institute of Nanotechnology Amity University Uttar Pradesh Noida India
| |
Collapse
|
12
|
Schulz C, Jung F, Küpper JH. Inhibition of phase-1 biotransformation and cytostatic effects of diphenyleneiodonium on hepatoblastoma cell line HepG2 and a CYP3A4-overexpressing HepG2 cell clone. Clin Hemorheol Microcirc 2021; 79:231-243. [PMID: 34487034 PMCID: PMC8609703 DOI: 10.3233/ch-219117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cell-based in vitro liver models are an important tool in the development and evaluation of new drugs in pharmacological and toxicological drug assessment. Hepatic microsomal enzyme complexes, consisting of cytochrome P450 oxidoreductase (CPR) and cytochrome P450 monooxygenases (CYPs), play a decisive role in catalysing phase-1 biotransformation of pharmaceuticals and xenobiotics. For a comprehensive understanding of the phase-1 biotransformation of drugs, the availability of well-characterized substances for the targeted modulation of in vitro liver models is essential. In this study, we investigated diphenyleneiodonium (DPI) for its ability to inhibit phase-1 enzyme activity and further its toxicological profile in an in vitro HepG2 cell model with and without recombinant expression of the most important drug metabolization enzyme CYP3A4. Aim of the study was to identify effective DPI concentrations for CPR/CYP activity modulation and potentially associated dose and time dependent hepatotoxic effects. The cells were treated with DPI doses up to 5,000nM (versus vehicle control) for a maximum of 48 h and subsequently examined for CYP3A4 activity as well as various toxicological relevant parameters such as cell morphology, integrity and viability, intracellular ATP level, and proliferation. Concluding, the experiments revealed a time- and concentration-dependent DPI mediated partial and complete inhibition of CYP3A4 activity in CYP3A4 overexpressing HepG2-cells (HepG2-CYP3A4). Other cell functions, including ATP synthesis and consequently the proliferation were negatively affected in both in vitro cell models. Since neither cell integrity nor cell viability were reduced, the effect of DPI in HepG2 can be assessed as cytostatic rather than cytotoxic.
Collapse
Affiliation(s)
- Christian Schulz
- Fraunhofer Project Group PZ-Syn, Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses (IZI-BB), Potsdam, Germany, located at the Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, Germany
| | - Friedrich Jung
- Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, Senftenberg, Germany
| | - Jan-Heiner Küpper
- Fraunhofer Project Group PZ-Syn, Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses (IZI-BB), Potsdam, Germany, located at the Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, Germany
| |
Collapse
|
13
|
Akunuri R, Veerareddy V, Kaul G, Akhir A, Unnissa T, Parupalli R, Madhavi YV, Chopra S, Nanduri S. Synthesis and antibacterial evaluation of (E)-1-(1H-indol-3-yl) ethanone O-benzyl oxime derivatives against MRSA and VRSA strains. Bioorg Chem 2021; 116:105288. [PMID: 34454299 DOI: 10.1016/j.bioorg.2021.105288] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/15/2021] [Accepted: 08/16/2021] [Indexed: 10/20/2022]
Abstract
Infections caused due to multidrug resistant organisms have emerged as a constant menace to human health. Even though numerous antibiotics are currently available for treating infectious diseases, a great number of bacterial strains have acquired resistance to many of them. Among these, infections caused due to Staphylococcus aureus are predominant in adult and paediatric population. Indole is a prominent chemical scaffold found in many pharmacologically active natural products and synthetic drugs. A number of oxime ether containing compounds have attracted attention of researchers owing to their interesting biological properties. Current work details the synthesis of indole containing oxime ether derivatives and their evaluation for antimicrobial activity against a panel of bacterial and mycobacterial strains. Synthesized compounds demonstrated good to moderate activity against drug-resistant S. aureus including resistant to vancomycin. Among all, compound 5h was found to possess potent activity against susceptible as well as MRSA and VRSA strains of S. aureus with MIC of 1 µg/mL and 2-4 µg/mL respectively. In addition, compound 5h was found to be non-toxic to Vero cells and exhibited good selectivity index of >40. Further, 5h, E-9a and E-9b possessed good biofilm inhibition against S. aureus. With these assuring biological properties, synthesized compounds could be potential prospective antimicrobial agents.
Collapse
Affiliation(s)
- Ravikumar Akunuri
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Vaishnavi Veerareddy
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow 226031, Uttar Pradesh, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Abdul Akhir
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow 226031, Uttar Pradesh, India
| | - Tanveer Unnissa
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Ramulu Parupalli
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Y V Madhavi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow 226031, Uttar Pradesh, India; AcSIR: Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Srinivas Nanduri
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India.
| |
Collapse
|
14
|
Yele V, Sanapalli BKR, Wadhwani AD, Mohammed AA. Benzohydrazide and Phenylacetamide Scaffolds: New Putative ParE Inhibitors. Front Bioeng Biotechnol 2021; 9:669728. [PMID: 34222214 PMCID: PMC8247773 DOI: 10.3389/fbioe.2021.669728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/24/2021] [Indexed: 11/13/2022] Open
Abstract
Antibacterial resistance (ABR) is a major life-threatening problem worldwide. Rampant dissemination of ABR always exemplified the need for the discovery of novel compounds. However, to circumvent the disease, a molecular target is required, which will lead to the death of the bacteria when acted upon by a compound. One group of enzymes that have proved to be an effective target for druggable candidates is bacterial DNA topoisomerases (DNA gyrase and ParE). In our present work, phenylacetamide and benzohydrazides derivatives were screened for their antibacterial activity against a selected panel of pathogens. The tested compounds displayed significant antibacterial activity with MIC values ranging from 0.64 to 5.65 μg/mL. Amongst 29 title compounds, compounds 5 and 21 exhibited more potent and selective inhibitory activity against Escherichia coli with MIC values at 0.64 and 0.67 μg/mL, respectively, and MBC at onefold MIC. Furthermore, compounds exhibited a post-antibiotic effect of 2 h at 1× MIC in comparison to ciprofloxacin and gentamicin. These compounds also demonstrated the concentration-dependent bactericidal activity against E. coli and synergized with FDA-approved drugs. The compounds are screened for their enzyme inhibitory activity against E. coli ParE, whose IC50 values range from 0.27 to 2.80 μg/mL. Gratifyingly, compounds, namely 8 and 25 belonging to the phenylacetamide series, were found to inhibit ParE enzyme with IC50 values of 0.27 and 0.28 μg/mL, respectively. In addition, compounds were benign to Vero cells and displayed a promising selectivity index (169.0629-951.7240). Moreover, compounds 1, 7, 8, 21, 24, and 25 (IC50: <1 and Selectivity index: >200) exhibited potent activity in reducing the E. coli biofilm in comparison with ciprofloxacin, erythromycin, and ampicillin. These astonishing results suggest the potential utilization of phenylacetamide and benzohydrazides derivatives as promising ParE inhibitors for treating bacterial infections.
Collapse
Affiliation(s)
- Vidyasrilekha Yele
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, India
| | | | - Ashish D Wadhwani
- Department of Pharmaceutical Biotechnology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, India
| | - Afzal Azam Mohammed
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, India
| |
Collapse
|
15
|
Marwick JA, Elliott RJR, Longden J, Makda A, Hirani N, Dhaliwal K, Dawson JC, Carragher NO. Application of a High-Content Screening Assay Utilizing Primary Human Lung Fibroblasts to Identify Antifibrotic Drugs for Rapid Repurposing in COVID-19 Patients. SLAS DISCOVERY 2021; 26:1091-1106. [PMID: 34078171 PMCID: PMC8458684 DOI: 10.1177/24725552211019405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Lung imaging and autopsy reports among COVID-19 patients show elevated lung scarring (fibrosis). Early data from COVID-19 patients as well as previous studies from severe acute respiratory syndrome, Middle East respiratory syndrome, and other respiratory disorders show that the extent of lung fibrosis is associated with a higher mortality, prolonged ventilator dependence, and poorer long-term health prognosis. Current treatments to halt or reverse lung fibrosis are limited; thus, the rapid development of effective antifibrotic therapies is a major global medical need that will continue far beyond the current COVID-19 pandemic. Reproducible fibrosis screening assays with high signal-to-noise ratios and disease-relevant readouts such as extracellular matrix (ECM) deposition (the hallmark of fibrosis) are integral to any antifibrotic therapeutic development. Therefore, we have established an automated high-throughput and high-content primary screening assay measuring transforming growth factor-β (TGFβ)-induced ECM deposition from primary human lung fibroblasts in a 384-well format. This assay combines longitudinal live cell imaging with multiparametric high-content analysis of ECM deposition. Using this assay, we have screened a library of 2743 small molecules representing approved drugs and late-stage clinical candidates. Confirmed hits were subsequently profiled through a suite of secondary lung fibroblast phenotypic screening assays quantifying cell differentiation, proliferation, migration, and apoptosis. In silico target prediction and pathway network analysis were applied to the confirmed hits. We anticipate this suite of assays and data analysis tools will aid the identification of new treatments to mitigate against lung fibrosis associated with COVID-19 and other fibrotic diseases.
Collapse
Affiliation(s)
- John A Marwick
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK.,Centre for Inflammation Research, Queens Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Richard J R Elliott
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK
| | - James Longden
- Center for Clinical Brain Sciences, Chancellors Building, University of Edinburgh, Edinburgh, UK
| | - Ashraff Makda
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK
| | - Nik Hirani
- Centre for Inflammation Research, Queens Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Kevin Dhaliwal
- Centre for Inflammation Research, Queens Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - John C Dawson
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK
| | - Neil O Carragher
- Cancer Research UK Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, UK
| |
Collapse
|
16
|
Structure based design, synthesis and evaluation of new thienopyrimidine derivatives as anti-bacterial agents. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130168] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
17
|
Ku JWK, Gan YH. New roles for glutathione: Modulators of bacterial virulence and pathogenesis. Redox Biol 2021; 44:102012. [PMID: 34090244 PMCID: PMC8182430 DOI: 10.1016/j.redox.2021.102012] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 04/29/2021] [Accepted: 05/12/2021] [Indexed: 01/02/2023] Open
Abstract
Low molecular weight (LMW) thiols contain reducing sulfhydryl groups that are important for maintaining antioxidant defense in the cell. Aside from the traditional roles of LMW thiols as redox regulators in bacteria, glutathione (GSH) has been reported to affect virulence and bacterial pathogenesis. The role of GSH in virulence is diverse, including the activation of virulence gene expression and contributing to optimal biofilm formation. GSH can also be converted to hydrogen sulfide (H2S) which is important for the pathogenesis of certain bacteria. Besides GSH, some bacteria produce other LMW thiols such as mycothiol and bacillithiol that affect bacterial virulence. We discuss these newer reported functions of LMW thiols modulating bacterial pathogenesis either directly or indirectly and via modulation of the host immune system.
Collapse
Affiliation(s)
- Joanne Wei Kay Ku
- Infectious Diseases Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Department of Biochemistry, National University of Singapore, 8 Medical Drive, 117596, Singapore
| | - Yunn-Hwen Gan
- Infectious Diseases Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Department of Biochemistry, National University of Singapore, 8 Medical Drive, 117596, Singapore.
| |
Collapse
|
18
|
Gaikwad NB, Afroz P, Ahmad MN, Kaul G, Shukla M, Nanduri S, Dasgupta A, Chopra S, Yaddanapudi VM. Design, synthesis, in vitro and in silico evaluation of new 3-phenyl-4,5-dihydroisoxazole-5-carboxamides active against drug-resistant mycobacterium tuberculosis. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
19
|
Malasala S, Gour J, Ahmad MN, Gatadi S, Shukla M, Kaul G, Dasgupta A, Madhavi YV, Chopra S, Nanduri S. Copper mediated one-pot synthesis of quinazolinones and exploration of piperazine linked quinazoline derivatives as anti-mycobacterial agents. RSC Adv 2020; 10:43533-43538. [PMID: 35519697 PMCID: PMC9058414 DOI: 10.1039/d0ra08644d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 10/29/2020] [Indexed: 11/26/2022] Open
Abstract
A facile method was developed for the synthesis of quinazolinone derivatives in a one-pot condensation reaction via in situ amine generation using ammonia as the amine source and with the formation of four new C-N bonds in good to excellent yields. With the optimised method, we synthesized a library of piperazine linked quinazoline derivatives and the synthesized compounds were evaluated for their inhibitory activity against Mycobacterium tuberculosis. The compounds 8b, 8e, 8f, 8m, 8n and 8v showed potent anti-mycobacterial activity with MIC values of 2-16 μg mL-1. All the synthesized compounds follow Lipinski's rules for drug likeness.
Collapse
Affiliation(s)
- Satyaveni Malasala
- National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Jitendra Gour
- National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Md Naiyaz Ahmad
- Division of Microbiology, CSIR-Central Drug Research Institute Sitapur Road, Sector 10, Janakipuram Extension Lucknow-226031 Uttar Pradesh India
| | - Srikanth Gatadi
- National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Manjulika Shukla
- Division of Microbiology, CSIR-Central Drug Research Institute Sitapur Road, Sector 10, Janakipuram Extension Lucknow-226031 Uttar Pradesh India
| | - Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute Sitapur Road, Sector 10, Janakipuram Extension Lucknow-226031 Uttar Pradesh India
| | - Arunava Dasgupta
- Division of Microbiology, CSIR-Central Drug Research Institute Sitapur Road, Sector 10, Janakipuram Extension Lucknow-226031 Uttar Pradesh India
| | - Y V Madhavi
- National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute Sitapur Road, Sector 10, Janakipuram Extension Lucknow-226031 Uttar Pradesh India
| | - Srinivas Nanduri
- National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| |
Collapse
|
20
|
Malasala S, Ahmad MN, Akunuri R, Shukla M, Kaul G, Dasgupta A, Madhavi YV, Chopra S, Nanduri S. Synthesis and evaluation of new quinazoline-benzimidazole hybrids as potent anti-microbial agents against multidrug resistant Staphylococcus aureus and Mycobacterium tuberculosis. Eur J Med Chem 2020; 212:112996. [PMID: 33190958 DOI: 10.1016/j.ejmech.2020.112996] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/12/2020] [Accepted: 11/02/2020] [Indexed: 12/17/2022]
Abstract
Owing to the rapid rise in antibiotic resistance, infectious diseases have become serious threat to public health. There is an urgent need to develop new antimicrobial agents with diverse chemical structures and novel mechanisms of action to overcome the resistance. In recent years, Quinazoline-benzimidazole hybrids have emerged as a new class of antimicrobial agents active against S. aureus and M. tuberculosis. In the current study, we designed and synthesized fifteen new Quinazoline-benzimidazole hybrids and evaluated them for their antimicrobial activity against S. aureus ATCC 29213 and M. tuberculosis H37Rv. These studies led to the identification of nine potent antibacterial agents 8a, 8b, 8c, 8d, 8f, 8g, 8h, 8i and 10c with MICs in the range of 4-64 μg/mL. Further, these selected compounds were found to possess potent antibacterial potential against a panel of drug-resistant clinical isolates which include methicillin and vancomycin-resistant S. aureus. The selected compounds were found to be less toxic to Vero cells (CC50 = 40-≥200 μg/mL) and demonstrated a favourable selectivity index. Based on the encouraging results obtained these new benzimidazol-2-yl quinazoline derivatives have emerged as promising antimicrobial agents for the treatment of MDR- S. aureus and Mycobacterial infections.
Collapse
Affiliation(s)
- Satyaveni Malasala
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, Telangana, India
| | - Md Naiyaz Ahmad
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India; AcSIR, Ghaziabad, Sector 19, Kamla Nehru Nagar, Ghaziabad, 201002, Uttar Pradesh, India
| | - Ravikumar Akunuri
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, Telangana, India
| | - Manjulika Shukla
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India; AcSIR, Ghaziabad, Sector 19, Kamla Nehru Nagar, Ghaziabad, 201002, Uttar Pradesh, India
| | - Arunava Dasgupta
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India; AcSIR, Ghaziabad, Sector 19, Kamla Nehru Nagar, Ghaziabad, 201002, Uttar Pradesh, India
| | - Y V Madhavi
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, Telangana, India
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India; AcSIR, Ghaziabad, Sector 19, Kamla Nehru Nagar, Ghaziabad, 201002, Uttar Pradesh, India.
| | - Srinivas Nanduri
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, Telangana, India.
| |
Collapse
|
21
|
Adherence of Trichomonas vaginalis to SiHa Cells is Inhibited by Diphenyleneiodonium. Microorganisms 2020; 8:microorganisms8101570. [PMID: 33066000 PMCID: PMC7600062 DOI: 10.3390/microorganisms8101570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/08/2020] [Accepted: 10/11/2020] [Indexed: 11/16/2022] Open
Abstract
Microbial adhesion is critical for parasitic infection and colonization of host cells. To study the host–parasite interaction in vitro, we established a flow cytometry-based assay to measure the adherence of Trichomonas vaginalis to epithelial cell line SiHa. SiHa cells and T. vaginalis were detected as clearly separated, quantifiable populations by flow cytometry. We found that T. vaginalis attached to SiHa cells as early as 30 min after infection and the binding remained stable up to several hours, allowing for analysis of drug treatment efficacy. Importantly, NADPH oxidase inhibitor DPI treatment induced the detachment of T. vaginalis from SiHa cells in a dose-dependent manner without affecting host cell viability. Thus, this study may provide an understanding for the potential development of therapies against T. vaginalis and other parasite infections.
Collapse
|
22
|
Malasala S, Ahmad MN, Gour J, Shukla M, Kaul G, Akhir A, Gatadi S, Madhavi Y, Chopra S, Nanduri S. Synthesis, biological evaluation and molecular modelling insights of 2-arylquinazoline benzamide derivatives as anti-tubercular agents. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128493] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
23
|
Bueso-Bordils JI, Alemán-López PA, Suay-García B, Martín-Algarra R, Duart MJ, Falcó A, Antón-Fos GM. Molecular Topology for the Discovery of New Broad-Spectrum Antibacterial Drugs. Biomolecules 2020; 10:E1343. [PMID: 32961733 PMCID: PMC7564208 DOI: 10.3390/biom10091343] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/11/2020] [Accepted: 09/17/2020] [Indexed: 01/06/2023] Open
Abstract
In this study, molecular topology was used to develop several discriminant equations capable of classifying compounds according to their antibacterial activity. Topological indices were used as structural descriptors and their relation to antibacterial activity was determined by applying linear discriminant analysis (LDA) on a group of quinolones and quinolone-like compounds. Four equations were constructed, named DF1, DF2, DF3, and DF4, all with good statistical parameters such as Fisher-Snedecor's F (over 25 in all cases), Wilk's lambda (below 0.36 in all cases) and percentage of correct classification (over 80% in all cases), which allows a reliable extrapolation prediction of antibacterial activity in any organic compound. From the four discriminant functions, it can be extracted that the presence of sp3 carbons, ramifications, and secondary amine groups in a molecule enhance antibacterial activity, whereas the presence of 5-member rings, sp2 carbons, and sp2 oxygens hinder it. The results obtained clearly reveal the high efficiency of combining molecular topology with LDA for the prediction of antibacterial activity.
Collapse
Affiliation(s)
- Jose I. Bueso-Bordils
- Departamento de Farmacia, Universidad Cardenal Herrera-CEU, CEU Universities C/Ramón y Cajal s/n, 46115 Alfara del Patriarca (Valencia), Spain; (P.A.A.-L.); (R.M.-A.); (M.J.D.); (G.M.A.-F.)
| | - Pedro A. Alemán-López
- Departamento de Farmacia, Universidad Cardenal Herrera-CEU, CEU Universities C/Ramón y Cajal s/n, 46115 Alfara del Patriarca (Valencia), Spain; (P.A.A.-L.); (R.M.-A.); (M.J.D.); (G.M.A.-F.)
| | - Beatriz Suay-García
- ESI International Chair@CEU-UCH, Departamento de Matemáticas, Física y Ciencias Tecnológicas, Universidad Cardenal Herrera-CEU, CEU Universities San Bartolomé 55, 46115 Alfara del Patriarca (Valencia), Spain; (B.S.-G.); (A.F.)
| | - Rafael Martín-Algarra
- Departamento de Farmacia, Universidad Cardenal Herrera-CEU, CEU Universities C/Ramón y Cajal s/n, 46115 Alfara del Patriarca (Valencia), Spain; (P.A.A.-L.); (R.M.-A.); (M.J.D.); (G.M.A.-F.)
| | - Maria J. Duart
- Departamento de Farmacia, Universidad Cardenal Herrera-CEU, CEU Universities C/Ramón y Cajal s/n, 46115 Alfara del Patriarca (Valencia), Spain; (P.A.A.-L.); (R.M.-A.); (M.J.D.); (G.M.A.-F.)
| | - Antonio Falcó
- ESI International Chair@CEU-UCH, Departamento de Matemáticas, Física y Ciencias Tecnológicas, Universidad Cardenal Herrera-CEU, CEU Universities San Bartolomé 55, 46115 Alfara del Patriarca (Valencia), Spain; (B.S.-G.); (A.F.)
| | - Gerardo M. Antón-Fos
- Departamento de Farmacia, Universidad Cardenal Herrera-CEU, CEU Universities C/Ramón y Cajal s/n, 46115 Alfara del Patriarca (Valencia), Spain; (P.A.A.-L.); (R.M.-A.); (M.J.D.); (G.M.A.-F.)
| |
Collapse
|
24
|
Appetecchia F, Consalvi S, Scarpecci C, Biava M, Poce G. SAR Analysis of Small Molecules Interfering with Energy-Metabolism in Mycobacterium tuberculosis. Pharmaceuticals (Basel) 2020; 13:E227. [PMID: 32878317 PMCID: PMC7557483 DOI: 10.3390/ph13090227] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 08/28/2020] [Accepted: 08/28/2020] [Indexed: 12/13/2022] Open
Abstract
Tuberculosis remains the world's top infectious killer: it caused a total of 1.5 million deaths and 10 million people fell ill with TB in 2018. Thanks to TB diagnosis and treatment, mortality has been falling in recent years, with an estimated 58 million saved lives between 2000 and 2018. However, the emergence of multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mtb strains is a major concern that might reverse this progress. Therefore, the development of new drugs acting upon novel mechanisms of action is a high priority in the global health agenda. With the approval of bedaquiline, which targets mycobacterial energy production, and delamanid, which targets cell wall synthesis and energy production, the energy-metabolism in Mtb has received much attention in the last decade as a potential target to investigate and develop new antimycobacterial drugs. In this review, we describe potent anti-mycobacterial agents targeting the energy-metabolism at different steps with a special focus on structure-activity relationship (SAR) studies of the most advanced compound classes.
Collapse
Affiliation(s)
| | | | | | | | - Giovanna Poce
- Department of Chemistry and Technologies of Drug, Sapienza University of Rome, piazzale A. Moro 5, 00185 Rome, Italy; (F.A.); (S.C.); (C.S.); (M.B.)
| |
Collapse
|
25
|
Heinen F, Engelage E, Cramer CJ, Huber SM. Hypervalent Iodine(III) Compounds as Biaxial Halogen Bond Donors. J Am Chem Soc 2020; 142:8633-8640. [PMID: 32286829 PMCID: PMC7252947 DOI: 10.1021/jacs.9b13309] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
![]()
“Hypervalent”
iodine(III) derivatives have been established as powerful reagents
in organic transformations, but so far only a handful of studies have
addressed their potential use as halogen-bonding noncovalent Lewis
acids. In contrast to “classical” halogen-bond donors
based on iodine(I) compounds, iodine(III) salts feature two directional
electrophilic axes perpendicular to each other. Herein we present
the first systematic investigation on biaxial binding to such Lewis
acids in solution. To this end, hindered and unhindered iodolium species
were titrated with various substrates, including diesters and diamides,
via 1H NMR spectroscopy and isothermal titration calorimetry.
Clear evidence for biaxial binding was obtained in two model systems,
and the association strengths increased by 2 orders of magnitude.
These findings were corroborated by density functional theory calculations
(which reproduced the trend well but underestimated the absolute binding
constants) and a cocrystal featuring biaxial coordination of a diamide
to the unhindered iodolium compound.
Collapse
Affiliation(s)
- Flemming Heinen
- Fakultät für Chemie und Biochemie, Organische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150,44801 Bochum, Germany
| | - Elric Engelage
- Fakultät für Chemie und Biochemie, Organische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150,44801 Bochum, Germany
| | - Christopher J Cramer
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis 55455-0431, Minnesota, United States
| | - Stefan M Huber
- Fakultät für Chemie und Biochemie, Organische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150,44801 Bochum, Germany
| |
Collapse
|
26
|
NU-6027 Inhibits Growth of Mycobacterium tuberculosis by Targeting Protein Kinase D and Protein Kinase G. Antimicrob Agents Chemother 2019; 63:AAC.00996-19. [PMID: 31285226 DOI: 10.1128/aac.00996-19] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 06/30/2019] [Indexed: 12/31/2022] Open
Abstract
Tuberculosis (TB) is a global health concern, and this situation has further worsened due to the emergence of drug-resistant strains and the failure of BCG vaccine to impart protection. There is an imperative need to develop highly sensitive, specific diagnostic tools, novel therapeutics, and vaccines for the eradication of TB. In the present study, a chemical screen of a pharmacologically active compound library was performed to identify antimycobacterial compounds. The phenotypic screen identified a few novel small-molecule inhibitors, including NU-6027, a known CDK-2 inhibitor. We demonstrate that NU-6027 inhibits Mycobacterium bovis BCG growth in vitro and also displayed cross-reactivity with Mycobacterium tuberculosis protein kinase D (PknD) and protein kinase G (PknG). Comparative structural and sequence analysis along with docking simulation suggest that the unique binding site stereochemistry of PknG and PknD accommodates NU-6027 more favorably than other M. tuberculosis Ser/Thr protein kinases. Further, we also show that NU-6027 treatment induces the expression of proapoptotic genes in macrophages. Finally, we demonstrate that NU-6027 inhibits M. tuberculosis growth in both macrophage and mouse tissues. Taken together, these results indicate that NU-6027 can be optimized further for the development of antimycobacterial agents.
Collapse
|
27
|
Saiki K, Urano-Tashiro Y, Konishi K, Takahashi Y. A screening system using minimal media identifies a flavin-competing inhibitor of Porphyromonas gingivalis growth. FEMS Microbiol Lett 2019; 366:5580286. [PMID: 31578552 DOI: 10.1093/femsle/fnz204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 09/29/2019] [Indexed: 12/14/2022] Open
Abstract
Chronic periodontitis is caused by dysbiosis of human oral commensals and especially by increase in Porphyromonas gingivalis. Inhibitors of P. gingivalis growth are expected to serve as effective drugs for the periodontal therapy. In the present study, we isolated new growth inhibitors of P. gingivalis using minimal media for P. gingivalis. The minimal media included the previously reported Globulin-Albumin (GA) and the newly developed Lactalbumin-Ferric chloride (LF) and Globulin-Calcium chloride (GC); all supported growth of the wild-type strain of P. gingivalis but did not support the growth of a mutant defective for a type IX secretion system. GC contains CaCl2, indicating that P. gingivalis requires a calcium ion for growth. Using LF and GA, we screened about 100 000 compounds and identified 73 that strongly inhibited the growth of P. gingivalis. More than half of these candidates would not have been obtained if these minimal media had not been used in our screen. One of our candidate inhibitors was diphenyleneiodonium chloride (DPIC), which showed strong bactericidal activity against P. gingivalis. Excess amounts of flavin adenine dinucleotide or flavin mononucleotide suppressed the inhibitory activity of DPIC, suggesting that DPIC would be a novel potent growth inhibitor.
Collapse
Affiliation(s)
- Keitarou Saiki
- Department of Microbiology, Nippon Dental University School of Life Dentistry at Tokyo, 1-9-20 Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan
| | - Yumiko Urano-Tashiro
- Department of Microbiology, Nippon Dental University School of Life Dentistry at Tokyo, 1-9-20 Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan
| | - Kiyoshi Konishi
- Department of Microbiology, Nippon Dental University School of Life Dentistry at Tokyo, 1-9-20 Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan
| | - Yukihiro Takahashi
- Department of Microbiology, Nippon Dental University School of Life Dentistry at Tokyo, 1-9-20 Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan
| |
Collapse
|
28
|
Kaul G, Shukla M, Dasgupta A, Chopra S. Update on drug-repurposing: is it useful for tackling antimicrobial resistance? Future Microbiol 2019; 14:829-831. [DOI: 10.2217/fmb-2019-0122] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow-226031, Uttar Pradesh, India
| | - Manjulika Shukla
- Division of Microbiology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow-226031, Uttar Pradesh, India
| | - Arunava Dasgupta
- Division of Microbiology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow-226031, Uttar Pradesh, India
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow-226031, Uttar Pradesh, India
| |
Collapse
|
29
|
Gatadi S, Gour J, Shukla M, Kaul G, Dasgupta A, Madhavi YV, Chopra S, Nanduri S. Synthesis and evaluation of new quinazolin-4(3H)-one derivatives as potent antibacterial agents against multidrug resistant Staphylococcus aureus and Mycobacterium tuberculosis. Eur J Med Chem 2019; 175:287-308. [PMID: 31096152 DOI: 10.1016/j.ejmech.2019.04.067] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/25/2019] [Accepted: 04/25/2019] [Indexed: 01/05/2023]
Abstract
Staphylococcus aureus and Mycobacterium tuberculosis are major causative agents responsible for serious nosocomial and community-acquired infections impacting healthcare systems globally. Over several decades, these pathogens have developed resistance to multiple antibiotics significantly affecting morbidity and mortality. Thus, these recalcitrant pathogens are amongst the most formidable microbial pathogens for which international healthcare agencies have mandated active identification and development of new antibacterial agents for chemotherapeutic intervention. In our present work, a series of new quinazolin-4(3H)-one derivatives were designed, synthesized and evaluated for their antibacterial activity against ESKAP pathogens and pathogenic mycobacteria. The experiments revealed that 4'c, 4'e, 4'f and 4'h displayed selective and potent inhibitory activity against Staphylococcus aureus with MIC values ranging from 0.03-0.25 μg/mL. Furthermore, compounds 4'c and 4'e were found to be benign to Vero cells (CC50 = >5 μg/mL) and displayed promising selectivity index (SI) > 167 and > 83.4 respectively. Additionally, 4'c and 4'e demonstrated equipotent MIC against multiple drug-resistant strains of S. aureus including VRSA, concentration dependent bactericidal activity against S. aureus and synergized with FDA approved drugs. Moreover, compound 4'c exhibited more potent activity in reducing the biofilm and exhibited a PAE of ∼2 h at 10X MIC which is comparable to levofloxacin and vancomycin. In vivo efficacy of 4'c in murine neutropenic thigh infection model revealed that 4'c caused a similar reduction in cfu as vancomycin. Gratifyingly, compounds 4d, 4e, 9a, 9b, 14a, 4'e and 4'f also exhibited anti-mycobacterial activity with MIC values in the range of 2-16 μg/mL. In addition, the compounds were found to be less toxic to Vero cells (CC50 = 12.5->100 μg/mL), thus displaying a favourable selectivity index. The interesting results obtained here suggest the potential utilization of these new quinazolin-4(3H)-one derivatives as promising antibacterial agents for treating MDR-Staphylococcal and mycobacterial infections.
Collapse
Affiliation(s)
- Srikanth Gatadi
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500037, India
| | - Jitendra Gour
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500037, India
| | - Manjulika Shukla
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Arunava Dasgupta
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Y V Madhavi
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500037, India
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India.
| | - Srinivas Nanduri
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500037, India.
| |
Collapse
|
30
|
Jung B, Li T, Ji S, Lee J. Efficacy of Diphenyleneiodonium Chloride (DPIC) Against Diverse Plant Pathogens. MYCOBIOLOGY 2019; 47:105-111. [PMID: 31001452 PMCID: PMC6452913 DOI: 10.1080/12298093.2018.1559122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 12/04/2018] [Accepted: 12/04/2018] [Indexed: 06/09/2023]
Abstract
Many of the fungicides and antibiotics currently available against plant pathogens are of limited use due to the emergence of resistant strains. In this study, we examined the effects of diphenyleneiodonium chloride (DPIC), an inhibitor of the superoxide producing enzyme NADPH oxidase, against fungal and bacterial plant pathogens. We found that DPIC inhibits fungal spore germination and bacterial cell proliferation. In addition, we demonstrated the potent antibacterial activity of DPIC using rice heads infected with the bacterial pathogen Burkholderia glumae which causes bacterial panicle blight (BPB). We found that treatment with DPIC reduced BPB when applied during the initial flowering stage of the rice heads. These results suggest that DPIC could serve as a new and useful antimicrobial agent in agriculture.
Collapse
Affiliation(s)
- Boknam Jung
- Department of Applied Biology, Dong-A University, Busan, Korea
| | - Taiying Li
- Department of Applied Biology, Dong-A University, Busan, Korea
| | - Sungyeon Ji
- Department of Applied Biology, Dong-A University, Busan, Korea
| | - Jungkwan Lee
- Department of Applied Biology, Dong-A University, Busan, Korea
| |
Collapse
|
31
|
Synthesis and evaluation of new 4-oxoquinazolin-3(4H)-yl)benzoic acid and benzamide derivatives as potent antibacterial agents effective against multidrug resistant Staphylococcus aureus. Bioorg Chem 2019; 83:569-579. [DOI: 10.1016/j.bioorg.2018.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/27/2018] [Accepted: 11/06/2018] [Indexed: 01/22/2023]
|
32
|
Synthesis of new 3-phenylquinazolin-4(3H)-one derivatives as potent antibacterial agents effective against methicillin- and vancomycin-resistant Staphylococcus aureus (MRSA and VRSA). Bioorg Chem 2018; 81:175-183. [DOI: 10.1016/j.bioorg.2018.08.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/14/2018] [Accepted: 08/08/2018] [Indexed: 12/14/2022]
|
33
|
Gatadi S, Gour J, Shukla M, Kaul G, Das S, Dasgupta A, Malasala S, Borra RS, Madhavi YV, Chopra S, Nanduri S. Synthesis of 1,2,3-triazole linked 4(3H)-Quinazolinones as potent antibacterial agents against multidrug-resistant Staphylococcus aureus. Eur J Med Chem 2018; 157:1056-1067. [PMID: 30176536 DOI: 10.1016/j.ejmech.2018.08.070] [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: 05/24/2018] [Revised: 08/13/2018] [Accepted: 08/25/2018] [Indexed: 12/14/2022]
Abstract
Methicillin and vancomycin resistant Staphylococcus aureus infections are an emerging global health concern leading to increasing morbidity and mortality. Continuous increase in drug resistance has underlined the need for discovery and development of new antibacterial agents acting via novel mechanisms to overcome this pressing issue. In this context, a number of 1,2,3-triazole linked 4(3H)-quinazolinone derivatives were designed and synthesized as potent antibacterial agents. When evaluated against ESKAP pathogen panel, compounds 7a, 7b, 7c, 7e, 7f, 7g, 7h, 7i, 9a, 9c, 9d and 9e exhibited significantly selective inhibitory activities towards Staphylococcus aureus (MIC = 0.5-4 μg/mL). To understand and confirm the specificity of these compounds, the compounds 7a and 9a were tested against E. coli and A. baumannii in combination with sub-lethal concentrations of Polymyxin B nonapeptide (PMBN) and were found to be inactive. This clearly indicated that these compounds possess specific and potent activity towards S. aureus and are inactive against gram-negative pathogens. Encouragingly, the compounds were also found to be non toxic to Vero cells and displayed favourable selectivity index (SI = 40 to 80). Furthermore, 7a and 9a were found to possess potent inhibitory activity when tested against multidrug resistant S. aureus including strains resistant to vancomycin (MIC values 0.5-32 μg/mL), indicating that the compounds are able to escape current drug-resistance mechanisms. With the potent anti-bacterial activity exhibited the new series of 1,2,3-triazole linked 4(3H)-quinazolinones have emerged as promising candidates for treating multidrug resistant Staphylococcus aureus infections.
Collapse
Affiliation(s)
- Srikanth Gatadi
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, India
| | - Jitendra Gour
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, India
| | - Manjulika Shukla
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Grace Kaul
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Swetarka Das
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Arunava Dasgupta
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India
| | - Satyaveni Malasala
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, India
| | - Ramya Sri Borra
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, India
| | - Y V Madhavi
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, India
| | - Sidharth Chopra
- Division of Microbiology, CSIR-Central Drug Research Institute, Sitapur Road, Sector 10, Janakipuram Extension, Lucknow, 226031, Uttar Pradesh, India.
| | - Srinivas Nanduri
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, 500 037, India.
| |
Collapse
|
34
|
Kulkarni A, Sharma AK, Chakrapani H. Redox-guided small molecule antimycobacterials. IUBMB Life 2018; 70:826-835. [DOI: 10.1002/iub.1867] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 04/14/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Amogh Kulkarni
- Department of Chemistry; Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road; Pune Maharashtra India
| | - Ajay Kumar Sharma
- Department of Chemistry; Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road; Pune Maharashtra India
| | - Harinath Chakrapani
- Department of Chemistry; Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road; Pune Maharashtra India
| |
Collapse
|