1
|
Kleks G, Holland DC, Kennedy EK, Avery VM, Carroll AR. Antiplasmodial Alkaloids from the Australian Bryozoan Amathia lamourouxi. JOURNAL OF NATURAL PRODUCTS 2020; 83:3435-3444. [PMID: 33105995 DOI: 10.1021/acs.jnatprod.0c00929] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An extract from the bryozoan Amathia lamourouxi with antiplasmodial activity was identified through high-throughput screening of an Australian marine invertebrate extract library against Plasmodium falciparum. Chemical investigation of A. lamourouxi resulted in the isolation of six new brominated alkaloids, convolutamines K and L (1 and 2), volutamides F-H (3-5), and 2,5-dibromo-1-methyl-1H-indole-3-carbaldehyde (6). Three of the compounds (2-4) displayed moderate to potent antiplasmodial activity against both the chloroquine-sensitive (3D7) and chloroquine-resistant (Dd2) parasite strains of Plasmodium falciparum with an IC50 range of 0.57-1.7 μM and a high selectivity index against a human cell line (HEK293).
Collapse
Affiliation(s)
- Guy Kleks
- Environmental Futures Research Institute, Griffith University, Gold Coast, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Darren C Holland
- Environmental Futures Research Institute, Griffith University, Gold Coast, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Emily K Kennedy
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
- Discovery Biology, Griffith University, Brisbane, QLD 4111, Australia
| | - Vicky M Avery
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
- Discovery Biology, Griffith University, Brisbane, QLD 4111, Australia
| | - Anthony R Carroll
- Environmental Futures Research Institute, Griffith University, Gold Coast, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| |
Collapse
|
2
|
Shen Y, Chen BL, Zhang QX, Zheng YZ, Fu Q. Traditional uses, secondary metabolites, and pharmacology of Celastrus species - a review. JOURNAL OF ETHNOPHARMACOLOGY 2019; 241:111934. [PMID: 31129308 DOI: 10.1016/j.jep.2019.111934] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 05/02/2019] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Plants of genus Celastrus (Celastraceae) have been widely used in traditional Chinese medicine (TCM) and Indian medicine to treat cognitive dysfunction, epilepsy, insomnia, rheumatism, gout, and dyspepsia for thousands of years. AIM OF STUDY We critically summarized the current evidence on the botanic characterization and distribution, ethnopharmacology, secondary metabolites, pharmacological activities, qualitative and quantitative analysis, and toxicology of Celastrus species to provide perspectives for developing more attractive pharmaceuticals of plant origin. MATERIALS AND METHODS The relevant information on Celastrus species was gathered from worldwide accepted scientific databases via electronic search (Web of Science, SciFinder, PubMed, Elsevier, SpringerLink, Wiley Online, China Knowledge Resource Integrated, and Google Scholar). Information was also obtained from the literature and books as well as PhD and MSc dissertations. Plant names were validated by "The Plant List" (www.theplantlist.org). RESULTS Comprehensive analysis of the above mentioned databases and other sources confirmed that ethnomedical uses of plants of Celastrus genus had been recorded in China, India, and other countries in Southern Asia. The phytochemical investigation revealed the presence of β-dihydroagarofuranoids, diterpenoids, triterpenoids, tetraterpenes, phenylpropanoids, alkaloids, flavonoids, lignans, and others. The crude extracts and isolated constituents have exhibited a wide range of in vitro and in vivo pharmacological effects, including antitumor, cytotoxic, insecticidal, antimicrobial, anti-rheumatoid arthritis (RA), anti-inflammatory, anti-ageing and antioxidative, and neuroprotective activities. CONCLUSION Plants of genus Celastrus have been confirmed to show a strong potential for therapeutic and health-maintaining effects, in light of their long traditional use and the phytochemical and pharmacological studies summarized here. Currently, pharmacological studies of this genus mainly focus on Celastrus paniculatus Willd. and Celastrus orbiculatus Thunb. Therefore, more pharmacological investigations should be implemented to support traditional uses of other medicinal plants of the genus Celastrus. Moreover, studies on the toxicity, bioavailability, and pharmacokinetics, in addition to clinical trials, are indispensable for assessing the safety and efficacy of the secondary metabolites or extracts obtained from plants belonging to this genus.
Collapse
Affiliation(s)
- Yue Shen
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture Rural Affairs, College of Pharmacy and Biological Engineering, Chengdu University, Chengdu, 610106, China
| | - Bi-Lian Chen
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture Rural Affairs, College of Pharmacy and Biological Engineering, Chengdu University, Chengdu, 610106, China
| | - Qin-Xiu Zhang
- School of Medical and Life Sciences, Chengdu University of TCM, Chengdu, 610072, China
| | - Yu-Zhong Zheng
- School of Food Engineering and Biotechnology, Hanshan Normal University, Chaozhou, 521041, China
| | - Qiang Fu
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture Rural Affairs, College of Pharmacy and Biological Engineering, Chengdu University, Chengdu, 610106, China.
| |
Collapse
|
3
|
Review of bioactive secondary metabolites from marine bryozoans in the progress of new drugs discovery. Future Med Chem 2018; 10:1497-1514. [PMID: 29788787 DOI: 10.4155/fmc-2018-0012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Marine bryozoans play an important role for the discovery of novel bioactive compounds among marine organisms. In this review, we summarize 164 new secondary metabolites including macrocyclic lactones, sterols, alkaloids, sphingolipids and so forth from 24 marine bryozoans in the last two decades. The structural features, bioactivity, structure-activity relationship, mechanism and strategies to address the resupply of these scarce secondary metabolites are discussed. The structural and bioactive diversity of the secondary metabolites from marine bryozoans indicated the possibility of using these compounds, especially bryostatin 1 (1), bryostatin analog (BA1), alkaloids (50, 53, 127-128 and 134-139), sphingolipids sulfates (148 and 149) and sulfur-containing aromatic compound (160), as the starting points for new drug discovery.
Collapse
|
4
|
Nalini S, Sandy Richard D, Mohammed Riyaz SU, Kavitha G, Inbakandan D. Antibacterial macro molecules from marine organisms. Int J Biol Macromol 2018; 115:696-710. [PMID: 29702164 DOI: 10.1016/j.ijbiomac.2018.04.110] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 04/21/2018] [Accepted: 04/21/2018] [Indexed: 11/29/2022]
Abstract
Marine ecosystem comprises of microorganisms, plants, invertebrates and vertebrates which were rich source of diverse antimicrobial products, which were structurally unique belonging to a known class of macromolecules like peptides, terpenes, alkaloids and proteins, etc. Natural macromolecules from marine ecological niches are a promising source of antibacterial agents against several drug resistant strains of pathogenic microorganisms; whereas rest of the metabolites were derived from marine flora and fauna while some arise from microbes associated with living organisms. >30,000 natural macromolecules have been identified and reported from marine organisms, however only few macromolecules are being explored and validated. The discovery of marine antibacterial macromolecules plays a significant part in the field of drug discovery and biomedical research. Despite the fact that literatures were documented on the antifungal, antiviral, antimalarial and anticancer properties, this review exclusively highlights the different antibacterial natural macromolecules from marine sources like bacteria, fungi, sponge, algae, bryozoans, tunicates, corals, cnidarians, arthropods and echinoderm along with their mode of action.
Collapse
Affiliation(s)
- S Nalini
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai 600119, India
| | - D Sandy Richard
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai 600119, India
| | - S U Mohammed Riyaz
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai 600119, India
| | - G Kavitha
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai 600119, India
| | - D Inbakandan
- Centre for Ocean Research, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai 600119, India.
| |
Collapse
|
5
|
Chadha N, Silakari O. Indoles as therapeutics of interest in medicinal chemistry: Bird's eye view. Eur J Med Chem 2017; 134:159-184. [DOI: 10.1016/j.ejmech.2017.04.003] [Citation(s) in RCA: 258] [Impact Index Per Article: 36.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 03/09/2017] [Accepted: 04/02/2017] [Indexed: 01/01/2023]
|
6
|
Abstract
This review covers the literature published in 2011 for marine natural products, with 870 citations (558 for the period January to December 2011) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1152 for 2011), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
Collapse
Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | | | | | | | | |
Collapse
|
7
|
|
8
|
Carroll AR, Wild SJ, Duffy S, Avery VM. Kororamide A, a new tribrominated indole alkaloid from the Australian bryozoan Amathia tortuosa. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.126] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
9
|
Abstract
Once considered to be isolation artifacts or chemical "mistakes" of nature, the number of naturally occurring organohalogen compounds has grown from a dozen in 1954 to >5000 today. Of these, at least 25% are halogenated alkaloids. This is not surprising since nitrogen-containing pyrroles, indoles, carbolines, tryptamines, tyrosines, and tyramines are excellent platforms for biohalogenation, particularly in the marine environment where both chloride and bromide are plentiful for biooxidation and subsequent incorporation into these electron-rich substrates. This review presents the occurrence of all halogenated alkaloids, with the exception of marine bromotyrosines where coverage begins where it left off in volume 61 of The Alkaloids. Whereas the biological activity of these extraordinary compounds is briefly cited for some examples, a future volume of The Alkaloids will present full coverage of this topic and will also include selected syntheses of halogenated alkaloids. Natural organohalogens of all types, especially marine and terrestrial halogenated alkaloids, comprise a rapidly expanding class of natural products, in many cases expressing powerful biological activity. This enormous proliferation has several origins: (1) a revitalization of natural product research in a search for new drugs, (2) improved compound characterization methods (multidimensional NMR, high-resolution mass spectrometry), (3) specific enzyme-based and other biological assays, (4) sophisticated collection methods (SCUBA and remote submersibles for deep ocean marine collections), (5) new separation and purification techniques (HPLC and countercurrent separation), (6) a greater appreciation of traditional folk medicine and ethobotany, and (7) marine bacteria and fungi as novel sources of natural products. Halogenated alkaloids are truly omnipresent in the environment. Indeed, one compound, Q1 (234), is ubiquitous in the marine food web and is found in the Inuit from their diet of whale blubber. Given the fact that of the 500,000 estimated marine organisms--which are the source of most halogenated alkaloids--only a small percentage have been investigated for their chemical content, it is certain that myriad new halogenated alkaloids are awaiting discovery. For example, it is estimated that nearly 4000 species of bryozoans have not been examined for their chemical content. The few species that have been studied contain some extraordinary halogenated alkaloids, such as hinckdentine A (610) and the chartellines (611-613). Of the estimated 1.5 million species of fungi, secondary metabolites have been characterized from only 5000 species. The future seems bright for the collector of halogenated alkaloids!
Collapse
Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire, USA.
| |
Collapse
|
10
|
Sperry J. Concise syntheses of 5,6-dibromotryptamine and 5,6-dibromo-N,N-dimethyltryptamine en route to the antibiotic alternatamide D. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.05.126] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
11
|
Derouaux A, Turk S, Olrichs NK, Gobec S, Breukink E, Amoroso A, Offant J, Bostock J, Mariner K, Chopra I, Vernet T, Zervosen A, Joris B, Frère JM, Nguyen-Distèche M, Terrak M. Small molecule inhibitors of peptidoglycan synthesis targeting the lipid II precursor. Biochem Pharmacol 2011; 81:1098-105. [PMID: 21356201 DOI: 10.1016/j.bcp.2011.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 02/10/2011] [Accepted: 02/14/2011] [Indexed: 11/19/2022]
Abstract
Bacterial peptidoglycan glycosyltransferases (GTs) of family 51 catalyze the polymerization of the lipid II precursor into linear peptidoglycan strands. This activity is essential to bacteria and represents a validated target for the development of new antibacterials. Application of structure-based virtual screening to the National Cancer Institute library using eHits program and the structure of the glycosyltransferase domain of the Staphylococcus aureus penicillin-binding protein 2 resulted in the identification of two small molecules analogues 5, a 2-[1-[(2-chlorophenyl)methyl]-2-methyl-5-methylsulfanylindol-3-yl]ethanamine and 5b, a 2-[1-[(3,4-dichlorophenyl)methyl]-2-methyl-5-methylsulfanylindol-3-yl]ethanamine that exhibit antibacterial activity against several Gram-positive bacteria but were less active on Gram-negative bacteria. The two compounds inhibit the activity of five GTs in the micromolar range. Investigation of the mechanism of action shows that the compounds specifically target peptidoglycan synthesis. Unexpectedly, despite the fact that the compounds were predicted to bind to the GT active site, compound 5b was found to interact with the lipid II substrate via the pyrophosphate motif. In addition, this compound showed a negatively charged phospholipid-dependent membrane depolarization and disruption activity. These small molecules are promising leads for the development of more active and specific compounds to target the essential GT step in cell wall synthesis.
Collapse
Affiliation(s)
- Adeline Derouaux
- Centre d'Ingénierie des Protéines, Université de Liège, Allée de la chimie, B6a, B-4000, Sart Tilman, Liège, Belgium
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Parsons TB, Ghellamallah C, Male L, Spencer N, Grainger RS. Regioselective dibromination of methyl indole-3-carboxylate and application in the synthesis of 5,6-dibromoindoles. Org Biomol Chem 2011; 9:5021-3. [DOI: 10.1039/c1ob05522d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
13
|
Abstract
This Highlight covers the chemical ecology of bryozoans, primarily the ecological functions of bryozoan natural products. The Highlight is arranged taxonomically, according to the bryozoan Treatise classification (P. Bock, Bryozoa Homepage, 2006, http://bryozoa.net).
Collapse
Affiliation(s)
- Jasmine H Sharp
- Institute of Biological Sciences, University of Wales Aberystwyth, Aberystwyth, Ceredigion, Wales, UK
| | | | | |
Collapse
|
14
|
Yamamoto Y, Kurazono M. A new class of anti-MRSA and anti-VRE agents: Preparation and antibacterial activities of indole-containing compounds. Bioorg Med Chem Lett 2007; 17:1626-8. [PMID: 17254785 DOI: 10.1016/j.bmcl.2006.12.081] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2006] [Revised: 12/19/2006] [Accepted: 12/23/2006] [Indexed: 11/24/2022]
Abstract
A new class of indole-containing compounds were prepared by the use of three component reaction and their in vitro antibacterial activities (MIC) were evaluated against Staphylococcus aureus and Enterococcus faecium including MRSA and VRE.
Collapse
Affiliation(s)
- Yasuo Yamamoto
- Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd, 760 Morooka-cho, Kohoku-ku, Yokohama 222-8567, Japan.
| | | |
Collapse
|
15
|
|
16
|
Laus G. Biological activities of natural halogen compounds. BIOACTIVE NATURAL PRODUCTS (PART F) 2001. [DOI: 10.1016/s1572-5995(01)80022-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
17
|
Hashima H, Hayashi M, Kamano Y, Sato N. Synthesis and biological activities of the marine bryozoan alkaloids convolutamines A, C and F, and lutamides A and C. Bioorg Med Chem 2000; 8:1757-66. [PMID: 10976524 DOI: 10.1016/s0968-0896(00)00110-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Synthesis of convolutamines and lutamides, new 2,4,6-tribromo-3-methoxyphenethylamine alkaloids isolated from Floridian marine bryozoan Amathia convoluta, was accomplished by a sequence of reactions starting from 3-hydroxyphenethylamines. Cytotoxities of the synthetic lutamides, convolutamines and their de-O-methyl derivatives were examined using drug-sensitive and -resistant P388 as well as KB cell lines. The bioassay suggests that the 2,4,6-tribromo-3-methoxyphenethylamine is an indispensable unit for detection of the activities. Additionally, a reversal of drug resistance by those alkaloids is recognized.
Collapse
Affiliation(s)
- H Hashima
- Department of Biological Science, Kanagawa University, Hiratsuka, Japan
| | | | | | | |
Collapse
|
18
|
Gribble GW. The natural production of organobromine compounds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2000; 7:37-47. [PMID: 19153837 DOI: 10.1065/espr199910.002] [Citation(s) in RCA: 149] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Organobromine chemicals are produced naturally by an array of biological and other chemical processes in our environment. Some of these compounds are identical to man-made organobromine compounds, such as methyl bromide, bromoform, and bromophenols, but many others are entirely new moleclar entities, often possessing extraordinary and important biological properties. Although only a few natural organobromine compounds had been discovered up to 1968, this number as of early 1999 is more than 1,600, and new examples are being discovered continually. Organobromine compounds are produced naturally by marine creatures (sponges, corals, sea slugs, tunicates, sea fans) and seaweed, plants, fungi, lichen, algae, bacteria, microbes, and some mammals. Many of these organobromine compounds are used in chemical defense, to facilitate food gathering, or as hormones.
Collapse
Affiliation(s)
- G W Gribble
- Department of Chemistry, Dartmouth College, 6128 Burke Laboratory, 03755, Hanover, New Hampshire, USA.
| |
Collapse
|
19
|
Somei M, Hasegawa M, Yamada K, Nagahama Y. A Novel Methodology for Preparing 5-Chloro- and 5-Bromotryptamines and Tryptophanes, and Its Application to the Synthesis of (±)-Bromochelonin B. HETEROCYCLES 1999. [DOI: 10.3987/com-99-8721] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|