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Ho CH, Yang TY, Tseng SP, Su PY. Antimicrobial efficacy and amino acid substitutions associated with susceptibility to the tellurium compound AS101 against Haemophilus influenzae and Haemophilus parainfluenzae. Int Microbiol 2024:10.1007/s10123-024-00558-y. [PMID: 38987387 DOI: 10.1007/s10123-024-00558-y] [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: 06/09/2024] [Revised: 07/04/2024] [Accepted: 07/05/2024] [Indexed: 07/12/2024]
Abstract
The tellurite toxicity in Haemophilus influenzae and H. parainfluenzae remains unclear. To understand the potential of tellurite as a therapeutic option for these bacteria, we investigated the antimicrobial efficacy of AS101, a tellurium compound, against H. influenzae and H. parainfluenzae and the molecular basis of their differences in AS101 susceptibility. Through broth microdilution, we examined the minimum inhibitory concentration (MIC) of AS101 in 51 H. influenzae and 28 H. parainfluenzae isolates. Whole-genome sequencing was performed on the H. influenzae isolates to identify genetic variations associated with AS101 susceptibility. The MICs of AS101 were ≦ 4, 16-32, and ≧ 64 μg/mL in 9 (17.6%), 12 (23.5%), and 30 (58.8%) H. influenzae isolates, respectively, whereas ≦ 0.5 μg/mL in all H. parainfluenzae isolates, including multidrug-resistant isolates. Time-killing kinetic assay and scanning electron microscopy revealed the in vitro bactericidal activity of AS101 against H. parainfluenzae. Forty variations in nine tellurite resistance-related genes were associated with AS101 susceptibility. Logistic regression, receiver operator characteristic curve analysis, Venn diagram, and protein sequence alignment indicated that Val195Ile substitution in TerC, Ser93Gly in Gor (glutathione reductase), Pro44Ala/Ala50Pro in NapB (nitrate reductase), Val307Leu in TehA (tellurite resistance protein), Cys105Arg in CysK (cysteine synthase), and Thr364Ser in Csd (Cysteine desulfurase) were strongly associated with reduced AS101 susceptibility, whereas Ser155Pro in TehA with increased AS101 susceptibility. In conclusions, the antimicrobial efficacy of AS101 is high against H. parainfluenzae but low against H. influenzae. Genetic variations and corresponding protein changes relevant to AS101 non-susceptibility in H. influenzae were identified.
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Affiliation(s)
- Cheng-Hsun Ho
- Department of Medical Laboratory Science, College of Medical Science and Technology, I-Shou University, No.8, Yida Road, Jiaosu Village, Yanchao District, Kaohsiung City, 82445, Taiwan.
| | - Tsung-Ying Yang
- Department of Medical Laboratory Science, College of Medical Science and Technology, I-Shou University, No.8, Yida Road, Jiaosu Village, Yanchao District, Kaohsiung City, 82445, Taiwan
| | - Sung-Pin Tseng
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
- Center for Tropical Medicine and Infectious Disease Research, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan
- Graduate Institute of Animal Vaccine Technology, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Pei-Yi Su
- Department of Laboratory Medicine, E-DA Hospital, Kaohsiung, Taiwan
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Li R, Shen X, Li Z, Shen J, Tang H, Xu H, Shen J, Xu Y. Combination of AS101 and Mefloquine Inhibits Carbapenem-Resistant Pseudomonas aeruginosa in vitro and in vivo. Infect Drug Resist 2023; 16:7271-7288. [PMID: 38023412 PMCID: PMC10664714 DOI: 10.2147/idr.s427232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/27/2023] [Indexed: 12/01/2023] Open
Abstract
Background In recent years, carbapenem-resistant Pseudomonas aeruginosa (CRPA) has spread around the world, leading to a high mortality and close attention of medical community. In this study, we aim to find a new strategy of treatment for CRPA infections. Methods Eight strains of CRPA were collected, and PCR detected the multi-locus sequence typing (MLST). The antimicrobial susceptibility test was conducted using the VITEK@2 compact system. The minimum inhibitory concentration (MIC) for AS101 and mefloquine was determined using the broth dilution method. Antibacterial activity was tested in vitro and in vivo through the chessboard assay, time killing assay, and a mouse model. The mechanism of AS101 combined with mefloquine against CRPA was assessed through the biofilm formation inhibition assay, electron microscopy, and detection of reactive oxygen species (ROS). Results The results demonstrated that all tested CRPA strains exhibited multidrug resistance. Moreover, our investigation revealed a substantial synergistic antibacterial effect of AS101-mefloquine in vitro. The assay for inhibiting biofilm formation indicated that AS101-mefloquine effectively suppressed the biofilm formation of CRPA-5 and CRPA-6. Furthermore, AS101-mefloquine were observed to disrupt the bacterial cell wall and enhance the permeability of the cell membrane. This effect was achieved by stimulating the production of ROS, which in turn hindered the growth of CRPA-3. To evaluate the therapeutic potential, a murine model of CRPA-3 peritoneal infection was established. Notably, AS101-mefloquine administration resulted in a significant reduction in bacterial load within the liver, kidney, and spleen of mice after 72 hours of treatment. Conclusion The present study showed that the combination of AS101 and mefloquine yielded a notable synergistic bacteriostatic effect both in vitro and in vivo, suggesting a potential clinical application of this combination in the treatment of CRPA.
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Affiliation(s)
- Rongrong Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, People’s Republic of China
- Provincial Laboratories of Pathogen Biology and Zoonoses, Anhui Medical University, Hefei, People’s Republic of China
| | - Xuhang Shen
- Department of Gastroenterology, The First Affiliated Hospital of Anhui Medical University, Hefei, People’s Republic of China
| | - Zhengyuan Li
- Orthopedics, The First Affiliated Hospital of Anhui Medical University, Hefei, People’s Republic of China
| | - Jilong Shen
- Provincial Laboratories of Pathogen Biology and Zoonoses, Anhui Medical University, Hefei, People’s Republic of China
| | - Hao Tang
- Department of Clinical Laboratory, the Second Affiliated Hospital of Anhui Medical University, Hefei, People’s Republic of China
| | - Huaming Xu
- Department of Clinical Laboratory, the First Affiliated Hospital of Anhui University of Traditional Chinese Medicine, Hefei, People’s Republic of China
| | - Jilu Shen
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, People’s Republic of China
- Anhui Public Health Clinical Center, Hefei, People’s Republic of China
| | - Yuanhong Xu
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, People’s Republic of China
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Yang TY, Hung WC, Tsai TH, Lu PL, Wang SF, Wang LC, Lin YT, Tseng SP. Potentials of organic tellurium-containing compound AS101 to overcome carbapenemase-producing Escherichia coli. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2023; 56:1016-1025. [PMID: 37516546 DOI: 10.1016/j.jmii.2023.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 06/11/2023] [Accepted: 07/06/2023] [Indexed: 07/31/2023]
Abstract
BACKGROUND The issue of carbapenem-resistant Escherichia coli was aggravated yearly. The previous studies reported the varied but critical epidemiology of carbapenem-resistant E. coli among which the carbapenemase-producing strains were regarded as one of the most notorious issues. AS101, an organic tellurium-containing compound undergoing clinical trials, was revealed with antibacterial activities. However, little is known about the antibacterial effect of AS101 against carbapenemase-producing E. coli (CPEC). MATERIALS AND METHODS The minimum inhibitory concentration (MIC) of AS101 against the 15 isolates was examined using a broth microdilution method. The scanning electron microscopy, pharmaceutical manipulations, reactive oxygen species level, and DNA fragmentation assay were carried out to investigate the antibacterial mechanism. The sepsis mouse model was employed to assess the in vivo treatment effect. RESULTS The blaNDM (33.3%) was revealed as the dominant carbapenemase gene among the 15 CPEC isolates, followed by the blaKPC gene (26.7%). The MICs of AS101 against the 15 isolates ranged from 0.5 to 32 μg/ml, and 99.9% of bacterial eradication was observed at 8 h, 4 h, and 2 h for 1×, 2×, and 4 × MIC, respectively. The mechanistic investigations suggest that AS101 would enter the bacterial cell, and induce ROS generation, leading to DNA fragmentation. The in vivo study exhibited that AS101 possessed a steady treatment effect in a sepsis mouse model, with an up to 83.3% of survival rate. CONCLUSION The in vitro activities, mechanisms, and in vivo study of AS101 against CPEC were unveiled. Our finding provided further evidence for the antibiotic development of AS101.
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Affiliation(s)
- Tsung-Ying Yang
- Department of Medical Laboratory Science, I-Shou University, Kaohsiung, Taiwan; Research Organization for Nano and Life Innovation, Future Innovation Institute, Waseda University, Japan; Research Institute for Science and Engineering, Waseda University, Japan; School of Education, Waseda University, Japan
| | - Wei-Chun Hung
- Department of Microbiology and Immunology, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Tsung-Han Tsai
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Po-Liang Lu
- Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung, Taiwan; Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Sheng-Fan Wang
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Liang-Chun Wang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Yu-Tzu Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan.
| | - Sung-Pin Tseng
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan; Graduate Institute of Animal Vaccine Technology, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan; Center for Tropical Medicine and Infectious Disease Research, Kaohsiung Medical University, Kaohsiung, Taiwan.
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Tripathi A, Khan A, Kiran P, Shetty H, Srivastava R. Screening of AS101 analog, organotellurolate (IV) compound 2 for its in vitro biocompatibility, anticancer, and antibacterial activities. Amino Acids 2023:10.1007/s00726-023-03280-7. [PMID: 37227510 DOI: 10.1007/s00726-023-03280-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/10/2023] [Indexed: 05/26/2023]
Abstract
Organotellurium compounds are being well researched as potential candidates for their functional roles in therapeutic and clinical biology. Here, we report the in vitro anticancer and antibacterial activities of an AS101 analog, cyclic zwitterionic organotellurolate (IV) compound 2 [Te-{CH2CH(NH3+)COO}(Cl)3]. Different concentrations of compound 2 were exposed to fibroblast L929 and breast cancer MCF-7 cell lines to study its effect on cell viability. The fibroblast cells with good viability confirmed the biocompatibility, and compound 2 also was less hemolytic on RBCs. A cytotoxic effect on MCF-7 breast cancer cell line investigated compound 2 to be anti-cancerous with IC50 value of 2.86 ± 0.02 µg/mL. The apoptosis was confirmed through the cell cycle phase arrest of the organotellurolate (IV) compound 2. Examination of the antibacterial potency compound 2 was done based on the agar disk diffusion, minimum inhibitory concentration, and time-dependent assay for the Gram-positive Bacillus subtilis and Gram-negative Pseudomonas putida. For both bacterial strains, tests were performed with the concentration range of 3.9-500 μg/mL, and the minimum inhibition concentration value was found to be 125 μg/mL. The time-dependent assay suggested the bactericidal activity of organotellurolate (IV) compound, 2 against the bacterial strains.
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Affiliation(s)
- Abhishek Tripathi
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Amreen Khan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
- Center for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Pallavi Kiran
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Harsha Shetty
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Rohit Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076, India.
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Yang TY, Tseng SP, Ho HC, Chen LH, Hsueh PR, Lu PL, Lin CH, Wang LC. In Vitro Evaluation of Tellurium-Based AS101 Compound against Neisseria gonorrhoeae Infectivity. Microbiol Spectr 2023; 11:e0149622. [PMID: 36877078 PMCID: PMC10100759 DOI: 10.1128/spectrum.01496-22] [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: 04/28/2022] [Accepted: 02/06/2023] [Indexed: 03/07/2023] Open
Abstract
Neisseria gonorrhoeae (GC) is a obligate human pathogen responsible for gonorrhea, one of the most common sexually transmitted infections. The yearly increased multidrug resistance in GC has led to treatment failure clinically, suggesting an urgent need for novel therapy to combat this global health issue. AS101 [ammonium trichloro(dioxoethylene-O,O'-)tellurate], a tellurium-based compound previously used as an immunomodulatory agent, was found to have antimicrobial effects against Klebsiella pneumoniae via a high-throughput drug screening and showed antibacterial activity against Acinetobacter spp. This study aimed to evaluate the in vitro anti-gonococcal activity of AS101, including its antimicrobial activity, biofilm and infectivity inhibition, and potential underlying mechanisms. The agar-dilution-based MIC was used. The inhibition of GC microcolony formation and continual growth by AS101 was assessed by microscopy. The effect of AS101 on GC infectivity was evaluated by infecting endocervical ME180 and colorectal T84 epithelial cell lines. The mode of action was evaluated by a time-killing curve, transmission electron microscopy (TEM), and the level of reactive oxygen species (ROS). The MICs of MS11 and WHO GC isolates were both found to be 0.05 μg/mL. The biofilm formation, continual growth, and infectivity of two epithelial cell lines were significantly decreased with AS101 treatment. The time-kill curve, similar to that of azithromycin, suggested that AS101 is a bacteriostatic antimicrobial. However, TEM and ROS levels implied a mode of action different from that of azithromycin. Our findings highlighted the robust anti-gonococcal activities of AS101, which potentiates its use as a future antimicrobial for GC. IMPORTANCE Neisseria gonorrhoeae is an obligate human pathogen responsible for gonorrhea, one of the most common sexually transmitted infections. The yearly increased multidrug resistance in GC has led to treatment failure clinically, suggesting an urgent need for novel therapy to combat the global health issue. This study aimed to evaluate the in vitro anti-gonococcal activity of a previous immunomodulatory agent, AS101, and its underlying mechanisms. Here, we report that AS101 possesses remarkable anti-gonococcal activity. These findings supported further studies on in vivo experiments and formulations for the clinical application of AS101 as an anti-gonococcal agent.
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Affiliation(s)
- Tsung-Ying Yang
- Department of Medical Laboratory Science, I-Shou University, Kaohsiung, Taiwan
- Research Organization for Nano and Life Innovation, Future Innovation Institute, Waseda University, Tokyo, Japan
- Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
- School of Education, Waseda University, Tokyo, Japan
| | - Sung-Pin Tseng
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
- Graduate Institute of Animal Vaccine Technology, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Han-Chen Ho
- Department of Anatomy, College of Medicine, Tzu Chi University, Hualian, Taiwan
| | - Li-Hsuan Chen
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Po-Ren Hsueh
- Department of Laboratory Medicine, China Medical University Hospital, School of Medicine, China Medical University, Taichung, Taiwan
- Department of Internal Medicine, China Medical University Hospital, School of Medicine, China Medical University, Taichung, Taiwan
| | - Po-Liang Lu
- Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung, Taiwan
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chia-Hsuan Lin
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Liang-Chun Wang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
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Chiaverini L, Marzo T, La Mendola D. AS101: An overview on a leading tellurium-based prodrug. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Synergistic Combination of AS101 and Azidothymidine against Clinical Isolates of Carbapenem-Resistant Klebsiella pneumoniae. Pathogens 2021; 10:pathogens10121552. [PMID: 34959507 PMCID: PMC8706163 DOI: 10.3390/pathogens10121552] [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: 10/23/2021] [Revised: 11/19/2021] [Accepted: 11/25/2021] [Indexed: 11/17/2022] Open
Abstract
Owing to the over usage of carbapenems, carbapenem resistance has become a vital threat worldwide, and, thus, the World Health Organization announced the carbapenem-resistant Enterobacteriaceae (CRE) as the critical priority for antibiotic development in 2017. In the current situation, combination therapy would be one solution against CRE. Azidothymidine (AZT), a thymidine analog, has demonstrated its synergistically antibacterial activities with other antibiotics. The unexpected antimicrobial activity of the immunomodulator ammonium trichloro(dioxoethylene-o,o')tellurate (AS101) has been reported against carbapenem-resistant Klebsiella pneumoniae (CRKP). Here, we sought to investigate the synergistic activity between AS101 and AZT against 12 CRKP clinical isolates. According to the gene detection results, the blaOXA-1 (7/12, 58.3%), blaDHA (7/12, 58.3%), and blaKPC (7/12, 58.3%) genes were the most prevalent ESBL, AmpC, and carbapenemase genes, respectively. The checkerboard analysis demonstrated the remarkable synergism between AS101 and AZT, with the observable decrease in the MIC value for two agents and the fractional inhibitory concentration (FIC) index ≤0.5 in all strains. Hence, the combination of AS101 and azidothymidine could be a potential treatment option against CRKP for drug development.
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Souza JPA, Menezes LRA, Garcia FP, Scariot DB, Bandeira PT, Bespalhok MB, Giese SOK, Hughes DL, Nakamura CV, Barison A, Oliveira ARM, Campos RB, Piovan L. Synthesis, Mechanism Elucidation and Biological Insights of Tellurium(IV)-Containing Heterocycles. Chemistry 2021; 27:14427-14437. [PMID: 34406689 DOI: 10.1002/chem.202102287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Indexed: 11/08/2022]
Abstract
Inspired by the synthetic and biological potential of organotellurium substances, a series of five- and six-membered ring organotelluranes containing a Te-O bond were synthesized and characterized. Theoretical calculations elucidated the mechanism for the oxidation-cyclization processes involved in the formation of the heterocycles, consistent with chlorine transfer to hydroxy telluride, followed by a cyclization step with simultaneous formation of the new Te-O bond and deprotonation of the OH group. Moreover, theoretical calculations also indicated anti-diastereoisomers to be major products for two chirality center-containing compounds. Antileishmanial assays against Leishmania amazonensis promastigotes disclosed 1,2λ4 -oxatellurane LQ50 (IC50 =4.1±1.0; SI=12), 1,2λ4 -oxatellurolane LQ04 (IC50 =7.0±1.3; SI=7) and 1,2λ4 -benzoxatellurole LQ56 (IC50 =5.7±0.3; SI=6) as more powerful and more selective compounds than the reference, being up to four times more active. A stability study supported by 125 Te NMR analyses showed that these heterocycles do not suffer structural modifications in aqueous-organic media or at temperatures up to 65 °C.
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Affiliation(s)
- João Pedro A Souza
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, PR, 81.931-480, Brazil
| | - Leociley R A Menezes
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, PR, 81.931-480, Brazil
| | - Francielle P Garcia
- Health Sciences Center, Universidade Estadual de Maringá, Maringá, PR, 87.020-900, Brazil
| | - Débora B Scariot
- Health Sciences Center, Universidade Estadual de Maringá, Maringá, PR, 87.020-900, Brazil
| | - Pamela T Bandeira
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, PR, 81.931-480, Brazil
| | - Mateus B Bespalhok
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, PR, 81.931-480, Brazil
| | - Siddhartha O K Giese
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, PR, 81.931-480, Brazil
| | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, UK
| | - Celso V Nakamura
- Health Sciences Center, Universidade Estadual de Maringá, Maringá, PR, 87.020-900, Brazil
| | - Andersson Barison
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, PR, 81.931-480, Brazil
| | - Alfredo R M Oliveira
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, PR, 81.931-480, Brazil
| | - Renan B Campos
- Academic Department of Chemistry and Biology, Universidade Tecnológica Federal do Paraná, Curitiba, PR, 81.280-340, Brazil
| | - Leandro Piovan
- Department of Chemistry, Universidade Federal do Paraná, Curitiba, PR, 81.931-480, Brazil
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Yang TY, Tseng SP, Dlamini HN, Lu PL, Lin L, Wang LC, Hung WC. In Vitro and In Vivo Activity of AS101 against Carbapenem-Resistant Acinetobacter baumannii. Pharmaceuticals (Basel) 2021; 14:ph14080823. [PMID: 34451920 PMCID: PMC8399104 DOI: 10.3390/ph14080823] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/16/2021] [Accepted: 08/16/2021] [Indexed: 01/02/2023] Open
Abstract
The increasing trend of carbapenem-resistant Acinetobacter baumannii (CRAB) worldwide has become a concern, limiting therapeutic alternatives and increasing morbidity and mortality rates. The immunomodulation agent ammonium trichloro (dioxoethylene-O,O′-) tellurate (AS101) was repurposed as an antimicrobial agent against CRAB. Between 2016 and 2018, 27 CRAB clinical isolates were collected in Taiwan. The in vitro antibacterial activities of AS101 were evaluated using broth microdilution, time-kill assay, reactive oxygen species (ROS) detection and electron microscopy. In vivo effectiveness was assessed using a sepsis mouse infection model. The MIC range of AS101 for 27 CRAB isolates was from 0.5 to 32 µg/mL, which is below its 50% cytotoxicity (approximately 150 µg/mL). Bactericidal activity was confirmed using a time-kill assay. The antibacterial mechanism of AS101 was the accumulation of the ROS and the disruption of the cell membrane, which, in turn, results in cell death. The carbapenemase-producing A. baumannii mouse sepsis model showed that AS101 was a better therapeutic effect than colistin. The mice survival rate after 120 h was 33% (4/12) in the colistin-treated group and 58% (7/12) in the high-dose AS101 (3.33 mg/kg/day) group. Furthermore, high-dose AS101 significantly decreased bacterial population in the liver, kidney and spleen (all p < 0.001). These findings support the concept that AS101 is an ideal candidate for further testing in future studies.
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Affiliation(s)
- Tsung-Ying Yang
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-Y.Y.); (S.-P.T.); (H.N.D.)
| | - Sung-Pin Tseng
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-Y.Y.); (S.-P.T.); (H.N.D.)
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Graduate Institute of Animal Vaccine Technology, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 912, Taiwan
| | - Heather Nokulunga Dlamini
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-Y.Y.); (S.-P.T.); (H.N.D.)
| | - Po-Liang Lu
- Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
- Department of Internal Medicine, Division of Infectious Diseases, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
- School of Post-Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Lin Lin
- Department of Culinary Art, I-Shou University, Kaohsiung 84001, Taiwan;
| | - Liang-Chun Wang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;
| | - Wei-Chun Hung
- Department of Microbiology and Immunology, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Correspondence: ; Tel.: +886-7-312-1101 (ext. 2150-16)
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Yang TY, Kao HY, Lu PL, Chen PY, Wang SC, Wang LC, Hsieh YJ, Tseng SP. Evaluation of the Organotellurium Compound AS101 for Treating Colistin- and Carbapenem-Resistant Klebsiella pneumoniae. Pharmaceuticals (Basel) 2021; 14:ph14080795. [PMID: 34451891 PMCID: PMC8400984 DOI: 10.3390/ph14080795] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/01/2021] [Accepted: 08/09/2021] [Indexed: 01/21/2023] Open
Abstract
Colistin- and carbapenem-resistant Enterobacteriaceae cases are increasing at alarming rates worldwide. Drug repurposing is receiving greater attention as an alternative approach in light of economic and technical barriers in antibiotics research. The immunomodulation agent ammonium trichloro(dioxoethylene-O,O’-)tellurate (AS101) was repurposed as an antimicrobial agent against colistin- and carbapenem-resistant Klebsiella pneumoniae (CRKP). 134 CRKP isolates were collected between 2012 and 2015 in Taiwan. The in vitro antibacterial activities of AS101 was observed through broth microdilution, time-kill assay, and electron microscopy. Pharmaceutical manipulation and RNA microarray were applied to investigate these antimicrobial mechanisms. Caenorhabditis elegans, a nematode animal model, and the Institute for Cancer Research (ICR) mouse model was employed for the evaluation of in vivo efficacy. The in vitro antibacterial results were found for AS101 against colistin- and CRKP isolates, with minimum inhibitory concentration (MIC) values ranging from <0.5 to 32 μg/mL. ROS-mediated antibacterial activity eliminated 99.9% of bacteria within 2–4 h. AS101 also extended the median survival time in a C. elegans animal model infected with a colistin-resistant CRKP isolate and rescued lethally infected animals in a separate mouse model of mono-bacterial sepsis by eliminating bacterial organ loads. These findings support the use of AS101 as an antimicrobial agent for addressing the colistin and carbapenem resistance crisis.
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Affiliation(s)
- Tsung-Ying Yang
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-Y.Y.); (P.-Y.C.); (S.-C.W.)
| | - Hao-Yun Kao
- Department of Healthcare Administration and Medical Informatics, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
| | - Po-Liang Lu
- Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
- School of Post-Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Pei-Yu Chen
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-Y.Y.); (P.-Y.C.); (S.-C.W.)
| | - Shu-Chi Wang
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-Y.Y.); (P.-Y.C.); (S.-C.W.)
- Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
- Center for Cancer Research, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Liang-Chun Wang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;
| | - Ya-Ju Hsieh
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
- Correspondence: (Y.-J.H.); (S.-P.T.); Tel.: +886-7-312-1101 (ext. 2350) (Y.-J.H.); +886-7-312-1101 (ext. 2356-22) (S.-P.T.)
| | - Sung-Pin Tseng
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; (T.-Y.Y.); (P.-Y.C.); (S.-C.W.)
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Graduate Institute of Animal Vaccine Technology, College of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung 900391, Taiwan
- Correspondence: (Y.-J.H.); (S.-P.T.); Tel.: +886-7-312-1101 (ext. 2350) (Y.-J.H.); +886-7-312-1101 (ext. 2356-22) (S.-P.T.)
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11
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Strike a Balance: Between Metals and Non-Metals, Metalloids as a Source of Anti-Infective Agents. INORGANICS 2021. [DOI: 10.3390/inorganics9060046] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Most of the commercially available anti-infective agents are organic molecules. In fact, though, during the pioneering times of modern medicine, at the beginning of the 20th century, several inorganic compounds of transition metals were used for medicinal application, to date, only a small number of inorganic drugs are used in clinical practice. Beyond the transition metals, metalloids—or semimetals—offer a rich chemistry in between that of metallic and non-metallic elements, and accordingly, peculiar features for their exploitation in medicinal chemistry. A few important examples of metalloid-based drugs currently used for the treatment of various diseases do exist. However, the use of this group of elements could be further expanded on the basis of their current applications and the clinical trials they entered. Considering that metalloids offer the opportunity to expand the “chemical-space” for developing novel anti-infective drugs and protocols, in this paper, we briefly recapitulate and discuss the current applications of B-, Si-, As-, Sb- and Te-based anti-infective drugs.
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12
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Qian W, Fu Y, Liu M, Wang T, Zhang J, Yang M, Sun Z, Li X, Li Y. In Vitro Antibacterial Activity and Mechanism of Vanillic Acid against Carbapenem-Resistant Enterobacter cloacae. Antibiotics (Basel) 2019; 8:antibiotics8040220. [PMID: 31766130 PMCID: PMC6963763 DOI: 10.3390/antibiotics8040220] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/08/2019] [Accepted: 11/09/2019] [Indexed: 12/20/2022] Open
Abstract
Vanillic acid (VA) is a flavoring agent found in edible plants and fruits. Few recent studies exhibited robust antibacterial activity of VA against several pathogen microorganisms. However, little was reported about the effect of VA on carbapenem-resistant Enterobacter cloacae (CREC). The purpose of the current study was to assess in vitro antimicrobial and antibiofilm activities of VA against CREC. Here, minimum inhibitory concentrations (MIC) of VA against CREC was determined via gradient diffusion method. Furthermore, the antibacterial mode of VA against CREC was elucidated by measuring changes in intracellular adenosine triphosphate (ATP) concentration, intracellular pH (pHin), cell membrane potential and membrane integrity. In addition, antibiofilm formation of VA was measured by crystal violet assay and visualized with field emission scanning electron microscopy (FESEM) and confocal laser scanning microscopy (CLSM). The results showed that MIC of VA against E. cloacae was 600 μg/mL. VA was capable of inhibiting the growth of CREC and destroying the cell membrane integrity of CREC, as confirmed by the decrease of intracellular ATP concentration, pHin and membrane potential as well as distinctive variation in cellular morphology. Moreover, crystal violet staining, FESEM and CLSM results indicated that VA displayed robust inhibitory effects on biofilm formation of CREC and inactivated biofilm-related CREC cells. These findings revealed that VA exhibits potent antibacterial activity against CREC, and thus has potential to be exploited as a natural preservative to control the CREC associated infections.
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Affiliation(s)
- Weidong Qian
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.F.); (M.L.); (J.Z.); (Z.S.); (X.L.)
- Correspondence: (W.Q.); (T.W.); Tel.: +86-29-86168583 (W.Q. & T.W.)
| | - Yuting Fu
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.F.); (M.L.); (J.Z.); (Z.S.); (X.L.)
| | - Miao Liu
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.F.); (M.L.); (J.Z.); (Z.S.); (X.L.)
| | - Ting Wang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.F.); (M.L.); (J.Z.); (Z.S.); (X.L.)
- Correspondence: (W.Q.); (T.W.); Tel.: +86-29-86168583 (W.Q. & T.W.)
| | - Jianing Zhang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.F.); (M.L.); (J.Z.); (Z.S.); (X.L.)
| | - Min Yang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.F.); (M.L.); (J.Z.); (Z.S.); (X.L.)
| | - Zhaohuan Sun
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.F.); (M.L.); (J.Z.); (Z.S.); (X.L.)
| | - Xiang Li
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (Y.F.); (M.L.); (J.Z.); (Z.S.); (X.L.)
| | - Yongdong Li
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China;
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13
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Sato RH, Kosaka PM, Omori ÁT, Ferreira EA, Petri DFS, Malvar Ó, Domínguez CM, Pini V, Ahumada Ó, Tamayo J, Calleja M, Cunha RLOR, Fiorito PA. Development of a methodology for reversible chemical modification of silicon surfaces with application in nanomechanical biosensors. Biosens Bioelectron 2019; 137:287-293. [PMID: 31125818 DOI: 10.1016/j.bios.2019.04.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 04/09/2019] [Accepted: 04/14/2019] [Indexed: 10/26/2022]
Abstract
Hypervalent tellurium compounds have a particular reactivity towards thiol compounds which are related to their biological properties. In this work, this property was assembled to tellurium-functionalized surfaces. These compounds were used as linkers in the immobilization process of thiolated biomolecules (such as DNA) on microcantilever surfaces. The telluride derivatives acted as reversible binding agents due to their redox properties, providing the regeneration of microcantilever surfaces and allowing their reuse for further biomolecules immobilizations, recycling the functional surface. Initially, we started from the synthesis of 4-((3-((4-methoxyphenyl) tellanyl) phenyl) amino)-4-oxobutanoic acid, a new compound, which was immobilized on a silicon surface. In nanomechanical systems, the detection involved a hybridization study of thiolated DNA sequences. Fluorescence microscopy technique was used to confirm the immobilization and removal of the telluride-DNA system and provided revealing results about the potentiality of applying redox properties to chalcogen derivatives at surfaces.
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Affiliation(s)
- Roseli H Sato
- CCNH, Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, UFABC, Avenida dos Estados, 5001, 09210-580, Santo André, São Paulo, Brazil
| | - Priscila M Kosaka
- Instituto Micro y Nanotecnología (IMN-CNM), CSIC, Isaac Newton 8 (PTM), Tres Cantos, Madrid, Spain
| | - Álvaro T Omori
- CCNH, Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, UFABC, Avenida dos Estados, 5001, 09210-580, Santo André, São Paulo, Brazil
| | - Edgard A Ferreira
- Escola de Engenharia, Universidade Presbiteriana Mackenzie, 01302-907, São Paulo, SP, Brazil
| | - Denise F S Petri
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, P.O. Box 26077, São Paulo, SP, 05513-970, Brazil
| | - Óscar Malvar
- Instituto Micro y Nanotecnología (IMN-CNM), CSIC, Isaac Newton 8 (PTM), Tres Cantos, Madrid, Spain
| | - Carmen M Domínguez
- Instituto Micro y Nanotecnología (IMN-CNM), CSIC, Isaac Newton 8 (PTM), Tres Cantos, Madrid, Spain
| | - Valerio Pini
- Instituto Micro y Nanotecnología (IMN-CNM), CSIC, Isaac Newton 8 (PTM), Tres Cantos, Madrid, Spain
| | - Óscar Ahumada
- Mecwins S.A, Plaza de la Encina 10-11, Núcleo 5, 2 B, 28760, Tres Cantos, Madrid, Spain
| | - Javier Tamayo
- Instituto Micro y Nanotecnología (IMN-CNM), CSIC, Isaac Newton 8 (PTM), Tres Cantos, Madrid, Spain
| | - Montserrat Calleja
- Instituto Micro y Nanotecnología (IMN-CNM), CSIC, Isaac Newton 8 (PTM), Tres Cantos, Madrid, Spain
| | - Rodrigo L O R Cunha
- CCNH, Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, UFABC, Avenida dos Estados, 5001, 09210-580, Santo André, São Paulo, Brazil
| | - Pablo A Fiorito
- Centro de Investigaciones y Transferencia Villa María (CIT VM - CONICET), Instituto de Ciencias Básicas y Aplicadas, Universidad Nacional de Villa María, Av. Arturo Jauretche 1555, Villa María, C.P, 5900, Córdoba, Argentina.
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14
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D'Arcy K, Doyle AP, Kavanagh K, Ronconi L, Fresch B, Montagner D. Stability of antibacterial Te(IV) compounds: A combined experimental and computational study. J Inorg Biochem 2019; 198:110719. [PMID: 31174178 DOI: 10.1016/j.jinorgbio.2019.110719] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/07/2019] [Accepted: 05/13/2019] [Indexed: 11/28/2022]
Abstract
Inorganic Te(IV) compounds are important cysteine protease inhibitors and antimicrobial agents; AS-101 [ammonium trichloro (dioxoethylene-O,O')tellurate] is the first compound of a family with formula NH4[C2H4Cl3O2Te], where a Te(IV) centre is bound to a chelate ethylene glycol, and showed several protective therapeutic applications. This compound is lacking in stability performance and is subjected to hydrolysis reaction with displacement of the diol ligand. In this paper, we report the stability trend of a series of analogues complexes of AS-101 with generic formula NH4[(RC2H3O2)Cl3Te], where R is an alkyl group with different chain length and different electronic properties, in order to find a correlation between structure and stability in aqueous-physiological conditions. The stability was studied in solution via multinuclear NMR spectroscopy (1H, 13C, 125Te) and computationally at the Density Functional Theory level with an explicit micro solvation model. The combined experimental and theoretical work highlights the essential role of the solvating environment and provides mechanistic insights into the complex decomposition reaction. Antimicrobial activity of the compounds was assessed against different bacterial strains.
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Affiliation(s)
- Kenneth D'Arcy
- Department of Chemistry, Maynooth University, Maynooth, Ireland
| | | | - Kevin Kavanagh
- Department of Biology, Maynooth University, Maynooth, Ireland
| | - Luca Ronconi
- School of Chemistry, National University of Ireland Galway, Galway, Ireland
| | - Barbara Fresch
- Department of Chemical Science, University of Padova, Italy.
| | - Diego Montagner
- Department of Chemistry, Maynooth University, Maynooth, Ireland.
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15
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Teixeira ML, Menezes LRA, Barison A, de Oliveira ARM, Piovan L. Investigation of Chemical Stability of Dihalogenated Organotelluranes in Organic-Aqueous Media: The Protagonism of Water. J Org Chem 2018; 83:7341-7346. [PMID: 29373033 DOI: 10.1021/acs.joc.7b02971] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The biological activity of tellurium compounds is closely related to the tellurium oxidation state or some of their structural features. Hypervalent dihalogenated organotelluranes 1-[butyl(dichloro)-λ4-tellanyl]-2-(methoxymethyl)benzene (1a) and 1-[butyl(dibromide)-λ4-tellanyl]-2-(methoxymethyl)benzene (1b) have been described as inhibitors of proteases (cysteine and threonine) and tyrosine phosphatases. However, poor attention has been given to their physicochemical properties. Here, a detailed investigation of the stability in water of these organotelluranes is reported using 125Te NMR analysis. Dihalogenated organotelluranes 1a and 1b were both stable in DMSO- d6 (from 25 to 75 °C), demonstrating their thermal stability. However, the addition of a phosphate buffer solution (pH 2-8) to 1a or 1b resulted in an immediate conversion to a new Te species, assumed to be the corresponding telluroxide. Similar behavior was observed in pure water, demonstrating the low chemical stability of these dihalogenated species in the presence of water. These results allow concluding that previous biological activity reported for dihalogenated organotelluranes 1a and 1b could be attributed to the corresponding derivatives from the reaction with water. In the same way as for AS-101, we demonstrated that organotelluranes 1a and 1b are not stable in aqueous solution. It suggests a proactive role of these organotelluranes in previously reported biological activity.
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Affiliation(s)
- Mariana L Teixeira
- Department of Chemistry , Universidade Federal do Paraná , Avenida Coronel Francisco Heráclito dos Santos, 100 - Jardim das Américas , Curitiba , Paraná 81531980 , Brazil
| | - Leociley R A Menezes
- Department of Chemistry , Universidade Federal do Paraná , Avenida Coronel Francisco Heráclito dos Santos, 100 - Jardim das Américas , Curitiba , Paraná 81531980 , Brazil
| | - Andersson Barison
- Department of Chemistry , Universidade Federal do Paraná , Avenida Coronel Francisco Heráclito dos Santos, 100 - Jardim das Américas , Curitiba , Paraná 81531980 , Brazil
| | - Alfredo R M de Oliveira
- Department of Chemistry , Universidade Federal do Paraná , Avenida Coronel Francisco Heráclito dos Santos, 100 - Jardim das Américas , Curitiba , Paraná 81531980 , Brazil
| | - Leandro Piovan
- Department of Chemistry , Universidade Federal do Paraná , Avenida Coronel Francisco Heráclito dos Santos, 100 - Jardim das Américas , Curitiba , Paraná 81531980 , Brazil
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16
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Vishwakarma P, Parmar N, Chandrakar P, Sharma T, Kathuria M, Agnihotri PK, Siddiqi MI, Mitra K, Kar S. Ammonium trichloro [1,2-ethanediolato-O,O']-tellurate cures experimental visceral leishmaniasis by redox modulation of Leishmania donovani trypanothione reductase and inhibiting host integrin linked PI3K/Akt pathway. Cell Mol Life Sci 2018; 75:563-588. [PMID: 28900667 PMCID: PMC11105478 DOI: 10.1007/s00018-017-2653-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/11/2017] [Accepted: 09/05/2017] [Indexed: 10/18/2022]
Abstract
In an endeavor to search for affordable and safer therapeutics against debilitating visceral leishmaniasis, we examined antileishmanial potential of ammonium trichloro [1,2-ethanediolato-O,O']-tellurate (AS101); a tellurium based non toxic immunomodulator. AS101 showed significant in vitro efficacy against both Leishmania donovani promastigotes and amastigotes at sub-micromolar concentrations. AS101 could also completely eliminate organ parasite load from L. donovani infected Balb/c mice along with significant efficacy against infected hamsters (˃93% inhibition). Analyzing mechanistic details revealed that the double edged AS101 could directly induce apoptosis in promastigotes along with indirectly activating host by reversing T-cell anergy to protective Th1 mode, increased ROS generation and anti-leishmanial IgG production. AS101 could inhibit IL-10/STAT3 pathway in L. donovani infected macrophages via blocking α4β7 integrin dependent PI3K/Akt signaling and activate host MAPKs and NF-κB for Th1 response. In silico docking and biochemical assays revealed AS101's affinity to form thiol bond with cysteine residues of trypanothione reductase in Leishmania promastigotes leading to its inactivation and inducing ROS-mediated apoptosis of the parasite via increased Ca2+ level, loss of ATP and mitochondrial membrane potential along with metacaspase activation. Our findings provide the first evidence for the mechanism of action of AS101 with excellent safety profile and suggest its promising therapeutic potential against experimental visceral leishmaniasis.
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Affiliation(s)
- Preeti Vishwakarma
- Division of Parasitology, CSIR-Central Drug Research Institute, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226031, India
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, New Delhi, India
| | - Naveen Parmar
- Division of Parasitology, CSIR-Central Drug Research Institute, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226031, India
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, New Delhi, India
| | - Pragya Chandrakar
- Division of Parasitology, CSIR-Central Drug Research Institute, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226031, India
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, New Delhi, India
| | - Tanuj Sharma
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Manoj Kathuria
- Electron Microscopy Unit, Sophisticated Analytical Instrument Facility, CSIR-Central Drug Research Institute, Lucknow, India
| | - Pramod K Agnihotri
- Division of Toxicology, CSIR-Central Drug Research Institute, Lucknow, India
| | - Mohammad Imran Siddiqi
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, New Delhi, India
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Kalyan Mitra
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, New Delhi, India
- Electron Microscopy Unit, Sophisticated Analytical Instrument Facility, CSIR-Central Drug Research Institute, Lucknow, India
| | - Susanta Kar
- Division of Parasitology, CSIR-Central Drug Research Institute, Jankipuram Extension, Sitapur Road, Lucknow, Uttar Pradesh, 226031, India.
- Academy of Scientific and Innovative Research, Anusandhan Bhawan, New Delhi, India.
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17
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Michael E, Nitzan Y, Langzam Y, Luboshits G, Cahan R. Effect of toluene on Pseudomonas stutzeri ST-9 morphology - plasmolysis, cell size, and formation of outer membrane vesicles. Can J Microbiol 2016; 62:682-91. [PMID: 27256870 DOI: 10.1139/cjm-2016-0099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Isolated toluene-degrading Pseudomonas stutzeri ST-9 bacteria were grown in a minimal medium containing toluene (100 mg·L(-1)) (MMT) or glucose (MMG) as the sole carbon source, with specific growth rates of 0.019 h(-1) and 0.042 h(-1), respectively. Scanning (SEM) as well as transmission (TEM) electron microscope analyses showed that the bacterial cells grown to mid-log phase in the presence of toluene possess a plasmolysis space. TEM analysis revealed that bacterial cells that were grown in MMT were surrounded by an additional "material" with small vesicles in between. Membrane integrity was analyzed by leakage of 260 nm absorbing material and demonstrated only 7% and 8% leakage from cultures grown in MMT compared with MMG. X-ray microanalysis showed a 4.3-fold increase in Mg and a 3-fold increase in P in cells grown in MMT compared with cells grown in MMG. Fluorescence-activated cell sorting (FACS) analysis indicated that the permeability of the membrane to propidium iodide was 12.6% and 19.6% when the cultures were grown in MMG and MMT, respectively. The bacterial cell length increased by 8.5% ± 0.1% and 17% ± 2%, as measured using SEM images and FACS analysis, respectively. The results obtained in this research show that the presence of toluene led to morphology changes, such as plasmolysis, cell size, and formation of outer membrane vesicles. However, it does not cause significant damage to membrane integrity.
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Affiliation(s)
- Esti Michael
- a Department of Chemical Engineering, Ariel University, Ariel 40700, Israel.,b The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Yeshayahu Nitzan
- b The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Yakov Langzam
- b The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Galia Luboshits
- a Department of Chemical Engineering, Ariel University, Ariel 40700, Israel
| | - Rivka Cahan
- a Department of Chemical Engineering, Ariel University, Ariel 40700, Israel
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18
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Zakrzewski J, Huras B, Kiełczewska A, Krawczyk M. Reactions of nitroxides 16. First nitroxides containing tellurium atom. RSC Adv 2016. [DOI: 10.1039/c6ra15880c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Five- and six-membered nitroxides with a tellurium containing moiety were synthesized by the addition of nitroxyl amines to phenyltellanyl alkylene isothiocyanates.
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Affiliation(s)
| | - Bogumiła Huras
- Institute of Industrial Organic Chemistry
- 03-236 Warsaw
- Poland
| | | | - Maria Krawczyk
- Institute of Industrial Organic Chemistry
- 03-236 Warsaw
- Poland
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19
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Gulati (nee Doomra) S, Pundir S, Kumar S, Bhasin KK. Synthesis and Characterization of 2-Fluoro-3-Pyridyl Tellurium Compounds: X-Ray Crystal Structure of Bis(2-Fluoro-3-Pyridyltelluro)Methane. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.996642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - Shikha Pundir
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Punjab University, Chandigarh- 160014, India
| | - Sanjeev Kumar
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Punjab University, Chandigarh- 160014, India
| | - Kuldip K. Bhasin
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Punjab University, Chandigarh- 160014, India
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20
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Chang HY, Cang J, Roy P, Chang HT, Huang YC, Huang CC. Synthesis and antimicrobial activity of gold/silver-tellurium nanostructures. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8305-8312. [PMID: 24832728 DOI: 10.1021/am501134h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Gold-tellurium nanostructures (Au-Te NSs), silver-tellurium nanostructures (Ag-Te NSs), and gold/silver-tellurium nanostructures (Au/Ag-Te NSs) have been prepared through galvanic reactions of tellurium nanotubes (Te NTs) with Au(3+), Ag(+), and both ions, respectively. Unlike the use of less environmentally friendly hydrazine, fructose as a reducing agent has been used to prepare Te NTs from TeO2 powders under alkaline conditions. The Au/Ag-Te NSs have highly catlaytic activity to convert nonfluorescent Amplex Red to form fluorescent product, revealing their great strength of generating reactive oxygen species (ROS). Au/Ag-Te NSs relative to the other two NSs exhibit greater antimicrobial activity toward the growth of E. coli, S. enteritidis, and S. aureus; the minimal inhibitory concentration (MIC) values of Au/Ag-Te NSs were much lower (>10-fold) than that of Ag-Te NSs and Au-Te NSs. The antibacterial activity of Au/Ag-Te NSs is mainly due to the release of Ag(+) ions and Te-related ions and also may be due to the generated ROS which destroys the bacteria membrane. In vitro cytotoxicity and hemolysis analyses have revealed their low toxicity in selected human cell lines and insignificant hemolysis in red blood cells. In addition, inhibition zone measurements using a Au/Ag-Te NSs-loaded konjac jelly film have suggested that it has great potential in practial application such as wound dressing for reducing bacterial wound infection. Having great antibacterial activitiy and excellent biocompatibility, the low-cost Au/Ag-Te NSs hold great potential as effective antimicrobial drugs.
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Affiliation(s)
- Hsiang-Yu Chang
- Department of Chemistry, National Taiwan University , Taipei 10617, Taiwan
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21
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Vázquez-Tato MP, Mena-Menéndez A, Feás X, Seijas JA. Novel microwave-assisted synthesis of the immunomodulator organotellurium compound ammonium trichloro(dioxoethylene-O,O')tellurate (AS101). Int J Mol Sci 2014; 15:3287-98. [PMID: 24566150 PMCID: PMC3958912 DOI: 10.3390/ijms15023287] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 02/11/2014] [Accepted: 02/17/2014] [Indexed: 12/17/2022] Open
Abstract
Ammonium trichloro[1,2-ethanediolato-O,O′]-tellurate (AS101) is the most important synthetic Te compound from the standpoint of its biological activity. It is a potent immunomodulator with a variety of potential therapeutic applications and antitumoral action in several preclinical and clinical studies. An experimental design has been used to develop and optimize a novel microwave-assisted synthesis (MAOS) of the AS101. In comparison to the results observed in the literature, refluxing Te(IV) chloride and ethylene glycol in acetonitrile (Method A), or by refluxing Te(IV) chloride and ammonium chloride in ethylene glycol (Method B), it was found that the developed methods in the present work are an effective alternative, because although performance slightly decreases compared to conventional procedures (75% vs. 79% by Method A, and 45% vs. 51% by Method B), reaction times decreased from 4 h to 30 min and from 4 h to 10 min, by Methods A and B respectively. MAOS is proving to be of value in the rapid synthesis of compounds with new and improved biological activities, specially based on the benefit of its shorter reaction times.
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Affiliation(s)
- M Pilar Vázquez-Tato
- Department of Organic Chemistry, Faculty of Science, University of Santiago de Compostela, E-27002 Lugo, Spain.
| | - Alberto Mena-Menéndez
- Department of Organic Chemistry, Faculty of Science, University of Santiago de Compostela, E-27002 Lugo, Spain.
| | - Xesús Feás
- Department of Organic Chemistry, Faculty of Science, University of Santiago de Compostela, E-27002 Lugo, Spain.
| | - Julio A Seijas
- Department of Organic Chemistry, Faculty of Science, University of Santiago de Compostela, E-27002 Lugo, Spain.
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Antibacterial effects of the tellurium compound OTD on E. coli isolates. Arch Microbiol 2013; 196:51-61. [PMID: 24322541 DOI: 10.1007/s00203-013-0941-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/21/2013] [Accepted: 11/05/2013] [Indexed: 11/27/2022]
Abstract
The antibacterial effects of a new organo-tellurium compound [Octa-O-bis-(R,R)-tartarate ditellurane (OTD)] on Escherichia coli isolates as a model are shown. OTD was found to be a bactericidal drug. It exhibits inhibition zones on a protein-rich agar medium but not in a protein-poor medium unless a thiol is added. When applied at the lag phase, OTD inhibits more efficiently than at the log phase. Thiols enhance the efficiency at the log phase. OTD inhibits biofilm formation of E. coli. X-ray microanalysis demonstrated damage caused to the Na⁺/K⁺ pumps and leakage of potassium and phosphorous. Scanning electron microscopy demonstrated an incomplete surface of the bacterial cell wall with a concavity in the center that looks like a hole. Transmission electron microscopy demonstrated severe damage, such as depletion, perforation, and holes in the inner membrane. These results indicate for the first time that the new tellurium compound has antibacterial activities.
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