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Morehouse NJ, Flewelling AJ, Liu DY, Cavanagh H, Linington RG, Johnson JA, Gray CA. Tolypocaibols: Antibacterial Lipopeptaibols from a Tolypocladium sp. Endophyte of the Marine Macroalga Spongomorpha arcta. JOURNAL OF NATURAL PRODUCTS 2023; 86:1529-1535. [PMID: 37313957 DOI: 10.1021/acs.jnatprod.3c00233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Two new lipopeptaibols, tolypocaibols A (1) and B (2), and the mixed NRPS-polyketide-shikimate natural product maximiscin [(P/M)-3)] were isolated from a Tolypocladium sp. fungal endophyte of the marine alga Spongomorpha arcta. Analysis of NMR and mass spectrometry data revealed the amino acid sequences of the lipopeptaibols, which both comprise 11 residues with a valinol C-terminus and a decanoyl acyl chain at the N-terminus. The configuration of the amino acids was determined by Marfey's analysis. Tolypocaibols A (1) and B (2) showed moderate, selective inhibition against Gram-positive and acid-fast bacterial strains, while maximiscin [(P/M)-3)] showed moderate, broad-spectrum antibiotic activity.
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Affiliation(s)
- Nicholas J Morehouse
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick E2K 5E2, Canada
| | - Andrew J Flewelling
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick E2K 5E2, Canada
| | - Dennis Y Liu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Hannah Cavanagh
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Roger G Linington
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - John A Johnson
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick E2K 5E2, Canada
| | - Christopher A Gray
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick E2K 5E2, Canada
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
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Morehouse NJ, Clark TN, Kerr RG, Johnson JA, Gray CA. Caryophyllene Sesquiterpenes from a Chaetomium globosum Endophyte of the Canadian Medicinal Plant Empetrum nigrum. JOURNAL OF NATURAL PRODUCTS 2023; 86:1615-1619. [PMID: 37267043 DOI: 10.1021/acs.jnatprod.2c01159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Punctaporonins T (1) and U (2), new caryophyllene sesquiterpenes, were isolated with three known punctaporonins, A (3), B (4), and C (5), from the endophytic fungus Chaetomium globosum (TC2-041). The structures and relative configurations of punctaporonins T and U were elucidated based on a combination of HRESIMS, 1D/2D NMR spectroscopic analysis, and X-ray diffraction analysis, while their absolute configuration is presumed to be consistent with the co-isolated 3-5 on biogenetic arguments. Compound 1 showed weak inhibitory activity against both Mycobacterium tuberculosis and Staphylococcus aureus.
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Affiliation(s)
- Nicholas J Morehouse
- Department of Biological Sciences, University of New Brunswick, 100 Tucker Park Road, Saint John, NB E2L 4L5, Canada
| | - Trevor N Clark
- Department of Biological Sciences, University of New Brunswick, 100 Tucker Park Road, Saint John, NB E2L 4L5, Canada
| | - Russell G Kerr
- Nautilus Biosciences Canada Inc., 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
- Department of Biomedical Sciences, Atlantic Veterinary College, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
| | - John A Johnson
- Department of Biological Sciences, University of New Brunswick, 100 Tucker Park Road, Saint John, NB E2L 4L5, Canada
| | - Christopher A Gray
- Department of Biological Sciences, University of New Brunswick, 100 Tucker Park Road, Saint John, NB E2L 4L5, Canada
- Department of Chemistry, University of New Brunswick, 30 Dineen Drive, Fredericton, NB E3B 5A3, Canada
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Bio-Guided Isolation of New Compounds from Baccharis spp. as Antifungal against Botrytis cinerea. Metabolites 2022; 12:metabo12121292. [PMID: 36557330 PMCID: PMC9781812 DOI: 10.3390/metabo12121292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/11/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Baccharis genus Asteraceae is widely used in traditional treatment against fever, headache, hepatobiliary disorders, skin ulcers, diabetes, and rheumatism, as well as an antispasmodic and diuretic. Its phytochemistry mainly shows the presence of flavonoids and terpenoids such as monoterpenes, sesquiterpenes, diterpenes, and triterpenes. Some of them have been evaluated for biological activities presenting allelopathic, antimicrobial, cytotoxic, and anti-inflammatory properties. In this paper, our research group reported the isolation, characterization, and antifungal evaluation of several molecules isolated from the dichloromethane extract from Baccharis prunifolia, Baccharis trinervis, and Baccharis zumbadorensis against the phytopathogen fungus Botrytis cinerea. The isolated compounds have not previously been tested against Botrytis, revealing an important source of antifungals in the genus Baccharis. Six known flavones were isolated from B. prunifolia. The dichloromethane extracts of B. trinervis and B. zumbadorensis were subjected to a bio-guided isolation, obtaining three known flavones, an α-hydroxidihydrochalcone mixture, one labdane, one triterpene, and two norbisabolenes from the most active fractions. The compounds 4'-methoxy-α-hydroxydihydrochalcone (7A), 3β,15-dihydroxylabdan-7-en-17-al (8), and 13-nor-11,12-dihydroxybisabol-2-enone (11) are novel. The most active compounds were the Salvigenin (5) and 1,2-dihydrosenedigital-2-one (10) with an IC50 of 13.5 and 3.1 μg/mL, respectively.
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Jiang XY, Ren ZY, Zhang NK, Yang KC, Wang GX, Jiang HF. Screening and evaluating honokiol from Magnolia officinalis against Nocardia seriolae infection in largemouth bass (Micropterus Salmoides). JOURNAL OF FISH DISEASES 2022; 45:1599-1607. [PMID: 35801398 DOI: 10.1111/jfd.13683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 06/21/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
Nocardiosis caused by Nocardia seriolae is a major threat to the aquaculture industry. Given that prolonged therapy administration can lead to a growth of antibiotic resistant strains, new antibacterial agents and alternative strategies are urgently needed. In this study, 80 medicinal plants were selected for antibacterial screening to obtain potent bioactive compounds against N. seriolae infection. The methanolic extracts of Magnolia officinalis exhibited the strongest antibacterial activity against N. seriolae with the minimal inhibitory concentration (MIC) of 12.5 μg/ml. Honokiol and magnolol as the main bioactive components of M. officinalis showed higher activity with the MIC value of 3.12 and 6.25 μg/ml, respectively. Sequentially, the evaluation of antibacterial activity of honokiol in vivo showed that honokiol had good biosafety, and could significantly reduce the bacterial load of nocardia-infected largemouth bass (p < .001). Furthermore, the survival rate of nocardia-infected fish fed with 100 mg/kg honokiol was obviously improved (p < .05). Collectively, these results suggest that medicinal plants represent a promising reservoir for discovering active components against Nocardia, and honokiol has great potential to be developed as therapeutic agents to control nocardiosis in aquaculture.
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Affiliation(s)
- Xin-Yuan Jiang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Zong-Yi Ren
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Nian-Kun Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Ke-Chen Yang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Gao-Xue Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Hai-Feng Jiang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
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Morehouse NJ, Flewelling AJ, Johnson JA, Gray CA. Halogenated Bianthrones From Penicillium roseopurpureum: a Fungal Endophyte of the Marine Alga Petalonia fascia. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20901405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
An extract of the fungus Penicillium roseopurpureum (KP1-135C) isolated from the marine alga Petalonia fascia showed selective antimicrobial activity against Staphylococcus aureus and Mycobacterium tuberculosis H37Ra. Bioassay-guided fractionation revealed that three halogenated bianthrones, neobulgarone D, neobulgarone E, and neobulgarone F, were responsible for the observed activity of the extract. The stereochemistry of the neobulgarones was unambiguously assigned based on polarimetric data and the analysis of 1H-nuclear magnetic resonance data obtained for the three bianthrones.
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Affiliation(s)
| | - Andrew J. Flewelling
- Department of Biological Sciences, University of New Brunswick, Saint John, Canada
| | - John A. Johnson
- Department of Biological Sciences, University of New Brunswick, Saint John, Canada
| | - Christopher A. Gray
- Department of Biological Sciences, University of New Brunswick, Saint John, Canada
- Department of Chemistry, University of New Brunswick, Fredericton, Canada
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Morehouse NJ, Flewelling AJ, Johnson JA, Gray CA. Isolation of Antibiotic 3R,5R-Dihydroxyhexanoate Polymers From Endophytic Fungi. Nat Prod Commun 2019. [DOI: 10.1177/1934578x19896661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The extracts of two isolates in our library of fungal endophytes, Annulohypoxylon multiforme (TC2-046) from the medicinal plant Juniperus communis and a sterile filamentous isolate (KP1-131DD) from the marine alga Scytosiphon lomentaria, displayed similar antimicrobial bioactivity profiles with notable high activity against Staphylococcus aureus. Bioassay-guided fractionation led to the isolation of poly(3 R,5 R-dihydroxyhexanoic acid) oligomers ranging from the trimer to the 29-mer that exhibited significant and selective inhibition of S. aureus and Mycobacterium tuberculosis H37Ra in vitro.
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Affiliation(s)
| | - Andrew J. Flewelling
- Department of Biological Sciences, University of New Brunswick, Saint John, Canada
| | - John A. Johnson
- Department of Biological Sciences, University of New Brunswick, Saint John, Canada
| | - Christopher A. Gray
- Department of Biological Sciences, University of New Brunswick, Saint John, Canada
- Department of Chemistry, University of New Brunswick, Fredericton, Canada
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Mazlun MH, Sabran SF, Mohamed M, Abu Bakar MF, Abdullah Z. Phenolic Compounds as Promising Drug Candidates in Tuberculosis Therapy. Molecules 2019; 24:molecules24132449. [PMID: 31277371 PMCID: PMC6651284 DOI: 10.3390/molecules24132449] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/27/2019] [Accepted: 05/28/2019] [Indexed: 02/06/2023] Open
Abstract
Tuberculosis (TB), caused by Mycobacterium tuberculosis (MTB) remains one of the deadliest, infectious diseases worldwide. The detrimental effects caused by the existing anti-TB drugs to TB patients and the emergence of resistance strains of M. tuberculosis has driven efforts from natural products researchers around the globe in discovering novel anti-TB drugs that are more efficacious and with less side effects. There were eleven main review publications that focused on natural products with anti-TB potentials. However, none of them specifically emphasized antimycobacterial phenolic compounds. Thus, the current review’s main objective is to highlight and summarize phenolic compounds found active against mycobacteria from 2000 to 2017. Based on the past studies in the electronic databases, the present review also focuses on several test organisms used in TB researches and their different distinct properties, a few types of in vitro TB bioassay and comparison between their strengths and drawbacks, different methods of extraction, fractionation and isolation, ways of characterizing and identifying isolated compounds and the mechanism of actions of anti-TB phenolic compounds as reported in the literature.
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Affiliation(s)
- Muhamad Harith Mazlun
- Department of Technology and Natural Resources, Faculty of Applied Sciences and Technology, Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Educational Hub, Pagoh 84600, Muar, Johor, Malaysia
- Centre of Research for Sustainable Uses of Natural Resources (CoR-SUNR), Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Educational Hub, Pagoh 84600, Muar, Johor, Malaysia
| | - Siti Fatimah Sabran
- Department of Technology and Natural Resources, Faculty of Applied Sciences and Technology, Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Educational Hub, Pagoh 84600, Muar, Johor, Malaysia.
- Centre of Research for Sustainable Uses of Natural Resources (CoR-SUNR), Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Educational Hub, Pagoh 84600, Muar, Johor, Malaysia.
| | - Maryati Mohamed
- Department of Technology and Natural Resources, Faculty of Applied Sciences and Technology, Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Educational Hub, Pagoh 84600, Muar, Johor, Malaysia
- Centre of Research for Sustainable Uses of Natural Resources (CoR-SUNR), Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Educational Hub, Pagoh 84600, Muar, Johor, Malaysia
| | - Mohd Fadzelly Abu Bakar
- Department of Technology and Natural Resources, Faculty of Applied Sciences and Technology, Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Educational Hub, Pagoh 84600, Muar, Johor, Malaysia
- Centre of Research for Sustainable Uses of Natural Resources (CoR-SUNR), Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Educational Hub, Pagoh 84600, Muar, Johor, Malaysia
| | - Zunoliza Abdullah
- Natural Products Division, Forest Research Institute Malaysia (FRIM), Kepong 52109, Selangor, Malaysia
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Sasikumar K, Ghosh AR, Dusthackeer A. Antimycobacterial potentials of quercetin and rutin against Mycobacterium tuberculosis H37Rv. 3 Biotech 2018; 8:427. [PMID: 30305996 DOI: 10.1007/s13205-018-1450-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 09/24/2018] [Indexed: 11/30/2022] Open
Abstract
Quercetin and rutin, two flavonoids were examined for antimycobacterial activities against M. tuberculosis H37Rv (ATCC 27294). The quercetin exhibited (99.30 ± 0.268%) in (LRP) assay at 200 µg/ml and 56.21 ± 0.97% inhibition in (BMD) at 50 µg/ml, whereas rutin exhibited (90.40 ± 0.68%) in LRP assay at 200 µg/ml and 56.10 ± 0.67% inhibition in BMD at 50 µg/ml. The minimum inhibitory concentration (MIC) was found to be 6.25 µg ml-1 and 25 µg ml-1 respectively. The current investigation suggests that quercetin has better inhibitory activity than rutin.
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Affiliation(s)
- Kandasamy Sasikumar
- 1Department of Integrative Biology, School of BioSciences and Technology (SBST), VIT University, Vellore, Tamilnadu 632014 India
| | - Asit Ranjan Ghosh
- 1Department of Integrative Biology, School of BioSciences and Technology (SBST), VIT University, Vellore, Tamilnadu 632014 India
| | - Azger Dusthackeer
- 2Department of Bacteriology, National Institute for Research in Tuberculosis (NIRT-ICMR), Chennai, Tamilnadu 600031 India
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Sng LH, Peh JWL, Kee MTL, Ya'akob NBM, Ong RTH, Wong CW, Chee CBE, Wang YT. Clofazimine drug susceptibility testing for Mycobacterium tuberculosis: the case of using the right diluent. Pathology 2018; 50:549-553. [PMID: 29891191 DOI: 10.1016/j.pathol.2018.01.006] [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: 09/14/2017] [Revised: 01/05/2018] [Accepted: 01/22/2018] [Indexed: 11/19/2022]
Abstract
Accurate and reliable drug susceptibility testing (DST) is essential for the effective treatment and control of tuberculosis. With the increase in drug-resistant organisms, newer and less conventional antimicrobial agents are used for treatment. Recently, we found an unprecedented rise in the number of clofazimine-resistant Mycobacterium tuberculosis isolates in our laboratory. An investigation found that this phenomenon was due to a change in the method of drug preparation. We performed studies to assess the impact of water and dimethyl sulfoxide (DMSO) as a final diluent for clofazimine drug testing. Based on our findings, the use of DMSO as a solvent for M. tuberculosis DST was optimised using the BACTEC MGIT 960 platform.
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Affiliation(s)
- Li-Hwei Sng
- Central Tuberculosis Laboratory, Singapore General Hospital, Singapore.
| | | | | | | | - Rick Twee-Hee Ong
- Saw Swee Hock School of Public Health, National University Health Singapore, National University of Singapore, Singapore
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Sieniawska E, Sawicki R, Golus J, Swatko-Ossor M, Ginalska G, Skalicka-Wozniak K. Nigella damascena L. Essential Oil-A Valuable Source of β-Elemene for Antimicrobial Testing. Molecules 2018; 23:molecules23020256. [PMID: 29382097 PMCID: PMC6017462 DOI: 10.3390/molecules23020256] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/24/2018] [Accepted: 01/26/2018] [Indexed: 11/16/2022] Open
Abstract
The most commonly used plant source of β-elemene is Curcuma wenyujin Y. H. Chen & C. Ling (syn. of Curcuma aromatic Salisb.) with its content in supercritical CO₂ extract up to 27.83%. However, the other rich source of this compound is Nigella damascena L. essential oil, in which β-elemene accounts for 47%. In this work, the effective protocol for preparative isolation of β-elemene from a new source-N. damascena essential oil-using high performance counter-current chromatography HPCCC was elaborated. Furthermore, since sesquiterpens are known as potent antimicrobials, the need for finding new agents designed to combat multi-drug resistant strains was addressed and the purified target compound and the essential oil were tested for its activity against a panel of Gram-positive and Gram-negative bacteria, fungi, and mycobacterial strains. The application of the mixture of petroleum ether, acetonitrile, and acetone in the ratio 2:1.5:0.5 (v/v) in the reversed phase mode yielded β-elemene with high purity in 70 min. The results obtained for antimicrobial assay clearly indicated that N. damascena essential oil and isolated β-elemene exert action against Mycobacterium tuberculosis strain H37Ra.
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Affiliation(s)
- Elwira Sieniawska
- Department of Pharmacognosy with Medicinal Plant Unit, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland;
- Correspondence: (E.S.); (R.S.); Tel.: +48-81448-7080 (E.S.); +48-81448-7025 (R.S.)
| | - Rafal Sawicki
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland; (J.G.); (M.S.-O.); (G.G.)
- Correspondence: (E.S.); (R.S.); Tel.: +48-81448-7080 (E.S.); +48-81448-7025 (R.S.)
| | - Joanna Golus
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland; (J.G.); (M.S.-O.); (G.G.)
| | - Marta Swatko-Ossor
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland; (J.G.); (M.S.-O.); (G.G.)
| | - Grazyna Ginalska
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland; (J.G.); (M.S.-O.); (G.G.)
| | - Krystyna Skalicka-Wozniak
- Department of Pharmacognosy with Medicinal Plant Unit, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland;
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Gupta VK, Kumar MM, Bisht D, Kaushik A. Plants in our combating strategies against Mycobacterium tuberculosis: progress made and obstacles met. PHARMACEUTICAL BIOLOGY 2017; 55:1536-1544. [PMID: 28385088 PMCID: PMC6130758 DOI: 10.1080/13880209.2017.1309440] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 03/03/2017] [Accepted: 03/17/2017] [Indexed: 06/01/2023]
Abstract
CONTEXT Traditionally used plants for treating chest-related problems/tuberculosis (TB) have not been evaluated in detail and hence a thorough study is needed in this regard. This knowledge may find application in developing new anti-TB drugs. OBJECTIVE This article elaborates on studying the activity of medicinal plants against different forms of Mycobacterium tuberculosis (Mtb) using different model strains, in vitro and ex vivo assays for studying the tuberculocidal activity and discusses the results from different studies on the activity against different forms of Mtb and human immunodeficiency virus-tuberculosis (HIV-TB) co-infection. METHODS Scientific databases such as PubMed, Elsevier, Scopus, Google scholar, were used to retrieve the information from 86 research articles (published from 1994 to 2016) related to the topic of this review. RESULTS Twenty-three plant species have been reported to possess active molecules against multi-drug resistant (MDR) isolates of Mtb. Seven plants were found to be active against intracellular Mtb and six against dormant bacilli. Seven plants were synergistically effective when combined with anti-TB drugs. Six studies suggest that the beneficial effects of plant extracts are due to their wide array of immuno-modulatory effects manifested by the higher expression of cytokines. Some studies have also shown the dual activity (anti-HIV and anti-TB) of plants. CONCLUSION We emphasize on identifying plants based on traditional uses and testing their extracts/phytomolecules against MDR strains, intracellular Mtb as well as against dormant Mtb. This will help in future to shorten the current therapeutic regimens for TB and also for treating HIV-TB co-infection.
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Affiliation(s)
- Vivek Kumar Gupta
- Department of Biochemistry, National JALMA Institute for Leprosy & Other Mycobacterial Diseases (ICMR), Agra, India
| | - M. Madhan Kumar
- Department of Immunology, National JALMA Institute for Leprosy & Other Mycobacterial Diseases (ICMR), Agra, India
| | - Deepa Bisht
- Department of Biochemistry, National JALMA Institute for Leprosy & Other Mycobacterial Diseases (ICMR), Agra, India
| | - Anupam Kaushik
- Department of Biochemistry, National JALMA Institute for Leprosy & Other Mycobacterial Diseases (ICMR), Agra, India
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Li H, Cowie A, Johnson JA, Webster D, Martyniuk CJ, Gray CA. Determining the mode of action of anti-mycobacterial C17 diyne natural products using expression profiling: evidence for fatty acid biosynthesis inhibition. BMC Genomics 2016; 17:621. [PMID: 27514659 PMCID: PMC4981992 DOI: 10.1186/s12864-016-2949-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 07/18/2016] [Indexed: 11/10/2022] Open
Abstract
Background The treatment of microbial infections is becoming increasingly challenging because of limited therapeutic options and the growing number of pathogenic strains that are resistant to current antibiotics. There is an urgent need to identify molecules with novel modes of action to facilitate the development of new and more effective therapeutic agents. The anti-mycobacterial activity of the C17 diyne natural products falcarinol and panaxydol has been described previously; however, their mode of action remains largely undetermined in microbes. Gene expression profiling was therefore used to determine the transcriptomic response of Mycobacterium smegmatis upon treatment with falcarinol and panaxydol to better characterize the mode of action of these C17 diynes. Results Our analyses identified 704 and 907 transcripts that were differentially expressed in M. smegmatis after treatment with falcarinol and panaxydol respectively. Principal component analysis suggested that the C17 diynes exhibit a mode of action that is distinct to commonly used antimycobacterial drugs. Functional enrichment analysis and pathway enrichment analysis revealed that cell processes such as ectoine biosynthesis and cyclopropane-fatty-acyl-phospholipid synthesis were responsive to falcarinol and panaxydol treatment at the transcriptome level in M. smegmatis. The modes of action of the two C17 diynes were also predicted through Prediction of Activity Spectra of Substances (PASS). Based upon convergence of these three independent analyses, we hypothesize that the C17 diynes inhibit fatty acid biosynthesis, specifically phospholipid synthesis, in mycobacteria. Conclusion Based on transcriptomic responses, it is suggested that the C17 diynes act differently than other anti-mycobacterial compounds in M. smegmatis, and do so by inhibiting phospholipid biosynthesis. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2949-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Haoxin Li
- Department of Biological Sciences, University of New Brunswick, PO Box 5050, 100 Tucker Park Road, E2L 4L5, Saint John, NB, Canada
| | - Andrew Cowie
- Department of Biological Sciences, University of New Brunswick, PO Box 5050, 100 Tucker Park Road, E2L 4L5, Saint John, NB, Canada
| | - John A Johnson
- Department of Biological Sciences, University of New Brunswick, PO Box 5050, 100 Tucker Park Road, E2L 4L5, Saint John, NB, Canada
| | - Duncan Webster
- Department of Medicine, Division of Infectious Diseases, Saint John Regional Hospital, 400 University Ave, E2L 4L4, Saint John, NB, Canada
| | - Christopher J Martyniuk
- Department of Biological Sciences, University of New Brunswick, PO Box 5050, 100 Tucker Park Road, E2L 4L5, Saint John, NB, Canada.,Present address: Center for Environmental and Human Toxicology & Department of Physiological Sciences, UF Genetics Institute, College of Veterinary Medicine, University of Florida, 1333 Center Drive, 32610-0144, Gainesville, FL, USA
| | - Christopher A Gray
- Department of Biological Sciences, University of New Brunswick, PO Box 5050, 100 Tucker Park Road, E2L 4L5, Saint John, NB, Canada. .,Department of Chemistry, University of New Brunswick, PO Box 4400, 30 Dineen Drive, E3B 5A3, Fredericton, NB, Canada.
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Morrison SA, Li H, Webster D, Johnson JA, Gray CA. Antimycobacterial triterpenes from the Canadian medicinal plant Sarracenia purpurea. JOURNAL OF ETHNOPHARMACOLOGY 2016; 188:200-3. [PMID: 27174081 DOI: 10.1016/j.jep.2016.04.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 04/21/2016] [Accepted: 04/28/2016] [Indexed: 05/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The purple pitcher plant, Sarracenia purpurea, is a medicinal plant used by the Canadian First Nations to treat a wide variety of illnesses. The Mi'kmaq and Wolastoqiyik (Maliseet) peoples of Eastern Canada have traditionally used infusions of S. purpurea for the treatment of tuberculosis-like symptoms. Previous investigations have shown methanolic extracts of S. purpurea to possess antimycobacterial activity. AIM OF THE STUDY To isolate and identify antimycobacterial constituents from S. purpurea. MATERIALS AND METHODS Methanolic extracts of S. purpurea were subjected to bioassay guided fractionation using the microplate resazurin assay (MRA) to assess inhibitory activity against Mycobacterium tuberculosis strain H37Ra. The antimycobacterial constituents were identified by NMR, MS and polarimetry. RESULTS The triterpenes betulinaldehyde, β-sitosterol, betulinic acid, and ursolic acid were isolated from S. purpurea. Betulinaldehyde, betulinic acid, and ursolic acid exhibited MICs of 450, 950, and 450μM and IC50s of 98, 169, and 93μM against M. tuberculosis H37Ra respectively whilst β-sitosterol was inactive (MIC and IC50 of >1000μM). CONCLUSIONS Betulinaldehyde, betulinic acid, and ursolic acid were identified as the principal constituents responsible for the antimycobacterial activity of S. purpurea. This work is consistent with the ethnopharmacological use of S. purpurea by Canadian First Nations as a treatment against infectious diseases.
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Affiliation(s)
- Steven A Morrison
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5
| | - Haoxin Li
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5
| | - Duncan Webster
- Division of Infectious Diseases, Department of Medicine, Saint John Regional Hospital, Saint John, New Brunswick, Canada E2L 4L2
| | - John A Johnson
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5
| | - Christopher A Gray
- Department of Biological Sciences, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5; Department of Chemistry, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5.
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Li H, Jean S, Webster D, Robichaud GA, Calhoun LA, Johnson JA, Gray CA. Dibenz[b,f]oxepin and Antimycobacterial Chalcone Constituents of Empetrum nigrum. JOURNAL OF NATURAL PRODUCTS 2015; 78:2837-2840. [PMID: 26473275 DOI: 10.1021/acs.jnatprod.5b00627] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Two new dibenz[b,f]oxepins, empetroxepins A and B (1 and 2), and seven known compounds (3-9) were isolated from an extract of the Canadian medicinal plant Empetrum nigrum that significantly inhibited the growth of Mycobacterium tuberculosis H37Ra. The structures of 1 and 2 were established through analysis of NMR and MS data. The antimycobacterial activity of the plant extract was attributed primarily to the presence of two chalcone derivatives (6 and 7) that exhibited selective antimycobacterial activity (IC50 values of 23.8 and 32.8 μM, respectively) in comparison to mammalian (HEK 293) cells (IC50 values of 109 and 249 μM, respectively).
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Affiliation(s)
- Haoxin Li
- Department of Biology, University of New Brunswick , Saint John, New Brunswick, Canada E2L 4L5
| | - Stéphanie Jean
- Department of Chemistry and Biochemistry, Université de Moncton , Moncton, New Brunswick, Canada E1A 3E9
- Atlantic Cancer Research Institute , Moncton, New Brunswick, Canada E1C 8X3
| | - Duncan Webster
- Department of Medicine, Division of Infectious Diseases, Saint John Regional Hospital , Saint John, New Brunswick, Canada E2L 4L2
| | - Gilles A Robichaud
- Department of Chemistry and Biochemistry, Université de Moncton , Moncton, New Brunswick, Canada E1A 3E9
- Atlantic Cancer Research Institute , Moncton, New Brunswick, Canada E1C 8X3
| | - Larry A Calhoun
- Department of Chemistry, University of New Brunswick , 30 Dineen Drive, Fredericton, New Brunswick, Canada E3B 5A3
| | - John A Johnson
- Department of Biology, University of New Brunswick , Saint John, New Brunswick, Canada E2L 4L5
| | - Christopher A Gray
- Department of Biology, University of New Brunswick , Saint John, New Brunswick, Canada E2L 4L5
- Department of Chemistry, University of New Brunswick , 30 Dineen Drive, Fredericton, New Brunswick, Canada E3B 5A3
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Clark TN, Ellsworth KT, Jean S, Webster D, Robichaud GA, Johnson JA, Graya CA. Isolation of Phomopsolide A and 6(E)-Phomopsolide A as Antimycobacterial Products from an Unidentified Endophyte of the Canadian Medicinal Plant Heracleum maximum. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An extract of an unidentified endophyte from the Canadian medicinal plant Heracleum maximum exhibited a unique metabolomic profile and significant antimycobacterial activity against Mycobacterium tuberculosis H37Ra. Bioassay guided fractionation of the extract led to the isolation of phomopsolide A (1) and 6(E’)-phomopsolide A (2). This is the first report of antimycobacterial activity for 1 and 2.
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Affiliation(s)
- Trevor N. Clark
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
| | - Katelyn T. Ellsworth
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
| | - Stephanie Jean
- Department of Chemistry and Biochemistry, Universite de Moncton, Moncton, New Brunswick, Canada El A 3E9
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada E1C 8X3
| | - Duncan Webster
- Department of Medicine, Division of Infectious Diseases, Saint John Regional Hospital, Saint John, New Brunswick, Canada E2L 4L2
| | - Gilles A. Robichaud
- Department of Chemistry and Biochemistry, Universite de Moncton, Moncton, New Brunswick, Canada El A 3E9
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada E1C 8X3
| | - John A. Johnson
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
| | - Christopher A. Graya
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
- Department of Chemistry, University of New Brunswick, 30 Dineen Dr, Fredericton, NB, Canada, E3B 5A3
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Li H, Doucet B, Flewelling AJ, Jean S, Webster D, Robichaud GA, Johnson JA, Gray CA. Antimycobacterial Natural Products from Endophytes of the Medicinal Plant Aralia nudicaulis. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Antimycobacterial extracts of a Penicillium sp. (isolate HL4-159-41B) and a Coniothyrium sp. (isolate HL6-097-027B) isolated from the rhizomes of the Canadian medicinal plant Aralia nudicaulis were found to contain palitantin (1) and botrallin (2), craterellin C (3), mycosporulone (4), spiromassaritone (5), and massarigenin D (6) respectively. Bioassays against Mycobacterium tuberculosis H37Ra revealed that 1-4 possess moderate antimycobacterial activity.
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Affiliation(s)
- Haoxin Li
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada E2L 4L5
| | - Brandon Doucet
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada E2L 4L5
| | - Andrew J. Flewelling
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada E2L 4L5
| | - Stephanie Jean
- Department of Chemistry and Biochemistry, Universite de Moncton, Moncton, New Brunswick, Canada El A 3E9
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada E1C 8X3
| | - Duncan Webster
- Department of Medicine, Division of Infectious Diseases, Saint John Regional Hospital, Saint John, New Brunswick, Canada E2L 4L2
| | - Gilles A. Robichaud
- Department of Chemistry and Biochemistry, Universite de Moncton, Moncton, New Brunswick, Canada El A 3E9
- Atlantic Cancer Research Institute, Moncton, New Brunswick, Canada E1C 8X3
| | - John A. Johnson
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada E2L 4L5
| | - Christopher A. Gray
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada E2L 4L5
- Department of Chemistry, University of New Brunswick, 30 Dineen Dr, Fredericton, NB, Canada E3B 5A3
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Flewelling AJ, Bishop AL, Johnson JA, Gray CA. Polyketides from an Endophytic Aspergillus fumigatus Isolate Inhibit the Growth of Mycobacterium tuberculosis and MRSA. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The crude extract of Aspergillus fumigatus isolate AF3-093A, an endophyte of the brown algaFucus vesiculosus, showed significant antimicrobial activity in initial bioactivity screens. Bioassay-guided fractionation of the extract led to the isolation of flavipin, chaetoglobosin A and chaetoglobosin B, all of which inhibited the growth of Staphylococcus aureus, methicillin-resistant S. aureus and Mycobacterium tuberculosis H37Ra. The antimycobacterial activity of these compounds has not been previously reported.
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Affiliation(s)
- Andrew J. Flewelling
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
| | - Amanda L Bishop
- Department of Chemistry, University of New Brunswick, 30 Dineen Dr, Fredericton, NB, Canada, E3B 5A3
| | - John A. Johnson
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
| | - Christopher A. Gray
- Department of Biology, University of New Brunswick, 100 Tucker Park Rd, Saint John, NB, Canada, E2L 4L5
- Department of Chemistry, University of New Brunswick, 30 Dineen Dr, Fredericton, NB, Canada, E3B 5A3
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Li H, Webster D, Johnson JA, Gray CA. Anti-mycobacterial triterpenes from the Canadian medicinal plant Alnus incana. JOURNAL OF ETHNOPHARMACOLOGY 2015; 165:148-151. [PMID: 25725435 DOI: 10.1016/j.jep.2015.02.042] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 02/14/2015] [Accepted: 02/17/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Alnus incana, commonly known as the gray or speckled alder, is a medicinal plant used by some Canadian First Nations to treat symptoms associated with tuberculosis. The aim of this study was to assess the anti-mycobacterial activity of an Alnus incana bark extract and to identify the active constituents of the extract. MATERIALS AND METHODS Methanolic extracts of the bark of A. incana were subjected to bioassay guided fractionation using Mycobacterium tuberculosis (H37Ra). The active constituents were identified by NMR and MS. RESULTS Four pentacyclic lupane triterpenes were isolated and were identified as betulin, betulinic acid, betulone and lupenone. Betulin displayed a MIC of 12.5 μg/mL and an IC50 of 2.4 μg/mL against M. tuberculosis (H37Ra). Betulinic acid and betulone showed lower anti-mycobacterial activities with IC50 values of 84 and 57 μg/mL respectively. Lupenone was inactive against M. tuberculosis (H37Ra). CONCLUSIONS Betulin, betulinic acid and betulone were identified as the major anti-mycobacterial constituents in the bark of A. incana and the functionality at carbons 3 and 28 of the lupane skeleton would seem to be important in determining the anti-mycobacterial activity of the triterpenes. This work supports the ethnopharmacological use of A. incana by Canadian First Nations communities as a treatment for tuberculosis.
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Affiliation(s)
- Haoxin Li
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5
| | - Duncan Webster
- Department of Medicine, Division of Infectious Diseases, Saint John Regional Hospital, Saint John, New Brunswick, Canada E2L 4L2
| | - John A Johnson
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5
| | - Christopher A Gray
- Department of Biology, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5; Department of Chemistry, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5.
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Development of an Antioxidant Phytoextract of Lantana grisebachii with Lymphoprotective Activity against In Vitro Arsenic Toxicity. Adv Pharmacol Sci 2014; 2014:416761. [PMID: 25002868 PMCID: PMC4070537 DOI: 10.1155/2014/416761] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 05/05/2014] [Accepted: 05/16/2014] [Indexed: 12/02/2022] Open
Abstract
Phytochemicals have been presumed to possess prophylactic and curative properties in several pathologies, such as arsenic- (As-) induced immunosuppression. Our aim was to discover a lymphoprotective extract from Lantana grisebachii Stuck. (Verbenaceae) (LG). We assessed its bioactivity and chemical composition using cell-based assays. Fractions produced from a hexane extract acutely induced nitrite formation in T-activated cell cultures (P < 0.0001). Water extraction released a fraction lacking nitrite inducing activity in both lymphocyte types. Aqueous LG was found to be safe in proliferated and proliferating cells. The infusion-derived extract presented better antioxidant capacity in proportion to phenolic amount in lymphocytes (infusive LG-1i at 100 μg/mL), which protected them against in vitro As-induced lymphotoxicity (P < 0.0001). This infusive LG phytoextract contained 10.23 ± 0.43 mg/g of phenolics, with 58.46% being flavonoids. Among the phenolics, the only predominant compound was 0.723 mg of chlorogenic acid per gram of dry plant, in addition to 10 unknown minor compounds. A fatty acid profile was assessed. It contained one-third of saturated fatty acids, one-third of ω9, followed by ω6 (~24%) and ω3 (~4%), and scarce ω7. Summing up, L. grisebachii was a source of bioactive and lymphoprotective compounds, which could counteract As-toxicity. This supports its phytomedical use and research in order to reduce As-related dysfunctions.
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