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Rees SWP, Rees TA, van Rensburg M, Walker CS, Pilkington LI, Barker D. Investigation Into Novel Mukanadin B, Mukanadin D and Mukanadin F Derivatives as Antagonists of 5-HT 1A Signalling. ChemMedChem 2024; 19:e202400102. [PMID: 38661010 DOI: 10.1002/cmdc.202400102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 04/26/2024]
Abstract
Marine bromopyrrole alkaloids are a diverse family of natural products with a large array of biological applications. The mukanadin family is a group of molecules consisting of seven members (mukanadin A-G) that possess a range of biological activities. Inhibition of serotonergic signaling has been demonstrated by mukanadin B derivatives, presenting this chemical scaffold as a candidate for further SAR exploration. A library of thirteen novel mukanadin B and D derivatives with structural variation targeted at the pyrrole ring, central linker and hydantoin ring, were synthesized. These analogues were subsequently assessed for serotonergic antagonism, in addition to natural products, mukanadin B, D, F and 9-hydroxy mukanadin B. A collection of compounds exhibited significant 5-HT1A signaling, including five of the novel derivatives and two of the naturally occurring bromopyrroles, mukanadin B and F. Particular SAR information could be determined from these results, such as modification of the pyrrole ring being a well-tolerated strategy for improving serotonergic inhibition. Other changes to the pharmacophore led to significant reduction in activity such as saturation of the linker region, or no conclusive improvement in inhibitory activity such as a 9-OH group or replacement of the hydantoin ring with a triazole moiety.
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Affiliation(s)
- Shaun W P Rees
- School of Chemical Sciences, University of Auckland, Auckland, 1010, New Zealand
| | - Tayla A Rees
- School of Biological Science, University of Auckland, Auckland, 1010, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, 1010, New Zealand
| | | | - Christopher S Walker
- School of Biological Science, University of Auckland, Auckland, 1010, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, 1010, New Zealand
| | - Lisa I Pilkington
- School of Chemical Sciences, University of Auckland, Auckland, 1010, New Zealand
- Te Pūnaha Matatini, Auckland, 1142, New Zealand
| | - David Barker
- School of Chemical Sciences, University of Auckland, Auckland, 1010, New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, Wellington, 6012, New Zealand
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Li C, Shi D. Structural and Bioactive Studies of Halogenated Constituents from Sponges. Curr Med Chem 2020; 27:2335-2360. [PMID: 30417770 DOI: 10.2174/0929867325666181112092159] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 09/10/2018] [Accepted: 11/06/2018] [Indexed: 11/22/2022]
Abstract
Marine organisms are abundant sources of bioactive natural products. Among metabolites produced by sponges and their associated microbial communities, halogenated natural compounds accounted for an important part due to their potent biological activities. The present review updates and compiles a total of 258 halogenated organic compounds isolated in the past three decades, especially brominated derivatives derived from 31 genera of marine sponges. These compounds can be classified as the following classes: brominated polyunsaturated lipids, nitrogen compounds, brominated tyrosine derivatives and other halogenated compounds. These substances were listed together with their source organisms, structures and bioactivities. For this purpose, 84 references were consulted.
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Affiliation(s)
- Chao Li
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dayong Shi
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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Kovalerchik D, Singh RP, Schlesinger P, Mahajni A, Shefer S, Fridman M, Ilan M, Carmeli S. Bromopyrrole Alkaloids of the Sponge Agelas oroides Collected Near the Israeli Mediterranean Coastline. JOURNAL OF NATURAL PRODUCTS 2020; 83:374-384. [PMID: 32072810 DOI: 10.1021/acs.jnatprod.9b00863] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Chemical investigation of the Mediterranean Sea sponge, Agelas oroides, collected off the Tel Aviv coast, yielded eight new bromopyrrole metabolites, agesamine C (1), dioroidamide A (2), slagenin D (3), (-)-monobromoagelaspongin (4), (-)-11-deoxymonobromoagelaspongin (5), (-)-11-O-methylmonobromoagelaspongin (6), E-dispacamide (7), and pyrrolosine (8), along with 18 known bromopyrrole alkaloids and a known bromotyrosine derivative. The structures of the new metabolites were elucidated by analysis of the spectroscopic and spectrometric data, including 1D and 2D NMR, ECD, and high-resolution mass spectrometry. The sponge extract exhibited antimicrobial activity against pathogenic and environmental bacteria, and quorum sensing inhibitory activity (QSI) against Chromobacterium violaceum. QSI guided separation of the extract established oroidin, benzosceptrin C, and 4,5-dibromopyrrole-2-carboxamide as the active components. The latter compounds were tested for inhibition of growth and biofilm formation in Pseudomonas aeruginosa PAO1. The most active and available compound, oroidin, was assayed for inhibition of growth and biofilm formation in bacteria that were isolated from the sponge and its environment.
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Affiliation(s)
- Dimitry Kovalerchik
- Raymond and Beverly Sackler School of Chemistry and Faculty of Exact Sciences , Tel Aviv University , Ramat-Aviv 69978 , Israel
| | - Ravindra Pal Singh
- School of Zoology, George S. Wise Faculty of Life Sciences , Tel Aviv University , Ramat Aviv 69978 , Israel
| | - Pnina Schlesinger
- Raymond and Beverly Sackler School of Chemistry and Faculty of Exact Sciences , Tel Aviv University , Ramat-Aviv 69978 , Israel
| | - Aseel Mahajni
- Raymond and Beverly Sackler School of Chemistry and Faculty of Exact Sciences , Tel Aviv University , Ramat-Aviv 69978 , Israel
| | - Sigal Shefer
- School of Zoology, George S. Wise Faculty of Life Sciences , Tel Aviv University , Ramat Aviv 69978 , Israel
- The Steinhardt Museum of Natural History , Tel Aviv University , Tel Aviv 6997801 , Israel
| | - Micha Fridman
- Raymond and Beverly Sackler School of Chemistry and Faculty of Exact Sciences , Tel Aviv University , Ramat-Aviv 69978 , Israel
| | - Micha Ilan
- School of Zoology, George S. Wise Faculty of Life Sciences , Tel Aviv University , Ramat Aviv 69978 , Israel
| | - Shmuel Carmeli
- Raymond and Beverly Sackler School of Chemistry and Faculty of Exact Sciences , Tel Aviv University , Ramat-Aviv 69978 , Israel
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van Rensburg M, Copp BR, Barker D. Synthesis and Absolute Stereochemical Reassignment of Mukanadin F: A Study of Isomerization of Bromopyrrole Alkaloids with Implications on Marine Natural Product Isolation. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800422] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Michelle van Rensburg
- School of Chemical Sciences; University of Auckland; Private Bag 92019 1142 Auckland New Zealand
| | - Brent R. Copp
- School of Chemical Sciences; University of Auckland; Private Bag 92019 1142 Auckland New Zealand
| | - David Barker
- School of Chemical Sciences; University of Auckland; Private Bag 92019 1142 Auckland New Zealand
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Zhu Y, Wang Y, Gu BB, Yang F, Jiao WH, Hu GH, Yu HB, Han BN, Zhang W, Shen Y, Lin HW. Antifungal bromopyrrole alkaloids from the South China Sea sponge Agelas sp. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.04.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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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!
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Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire, USA.
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Ebada SS, Edrada-Ebel R, de Voogd NJ, Wray V, Proksch P. Dibromopyrrole Alkaloids from the Marine Sponge Acanthostylotella sp. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900400112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Fourteen dibromopyrrole alkaloids were isolated from the marine sponge Acanthostylotella sp. collected in Indonesia. In addition to the known compounds 4,5-dibromo-N-(methoxy-methyl)-1 H-pyrrole-2-carboxamide (7), 4,5-dibromo-1 H-pyrrole-2-carboxamide (8), mukanadin D (9), (±)-longamide B methyl ester (10), (±)-longamide B (11), (±)-longamide (12), 3,4-dibromo-1 H-pyrrole-2-carboxamide (13), 2-cyano-4,5-dibromo-1 H-pyrrole (14), six compounds were isolated that proved to be new natural products including acanthamides A – D (1 – 4), methyl 3,4-dibromo-1 H-pyrrole-2-carboxylate (5) and 3,5-dibromo-1 H-pyrrole-2-carboxylic acid (6). The structures of the new compounds were unequivocally identified based on one and two dimensional NMR and on HRFTMS as well as by comparison with the literature.
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Affiliation(s)
- Sherif Saeed Ebada
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, Geb. 26.23, 40225 Düsseldorf, Germany
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmacy, Ain-Shams University, Abbasia, Cairo, Egypt
| | - RuAngelie Edrada-Ebel
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, The John Arbuthnott Building, 27 Taylor Street, Glasgow G4 0NR, United Kingdom
| | - Nicole J. de Voogd
- National Museum of Natural History, PO Box 9517 2300 RA Leiden, Netherlands
| | - Victor Wray
- Helmholtz Zentrum für Infektionsforschung, Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Peter Proksch
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, Geb. 26.23, 40225 Düsseldorf, Germany
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Abstract
This review covers the literature published in 2005 for marine natural products, with 704 citations (493 for the period January to December 2005) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, coelenterates, bryozoans, molluscs, tunicates and echinoderms. The emphasis is on new compounds (812 for 2005), together with their 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.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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