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Prebble DW, Holland DC, Ferretti F, Hayton JB, Avery VM, Mellick GD, Carroll AR. α-Synuclein Aggregation Inhibitory and Antiplasmodial Activity of Constituents from the Australian Tree Eucalyptus cloeziana. JOURNAL OF NATURAL PRODUCTS 2023; 86:2171-2184. [PMID: 37610242 DOI: 10.1021/acs.jnatprod.3c00458] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Amyloid protein aggregates are linked to the progression of neurodegenerative conditions and may play a role in life stages of Plasmodium falciparum, the parasite responsible for malaria. We hypothesize that amyloid protein aggregation inhibitors may show antiplasmodial activity and vice versa. To test this hypothesis, we screened antiplasmodial active extracts from 25 Australian eucalypt flowers using a binding affinity mass spectrometry assay to identify molecules that bind to the Parkinson's disease-implicated protein α-syn. Myrtucommulone P (1) from a flower extract of Eucalyptus cloeziana was shown to have α-syn affinity and antiplasmodial activity and to inhibit α-syn aggregation. 1 exists as a mixture of four interconverting rotamers. Assignment of the NMR resonances of all four rotamers allowed us to define the relative configuration, conformations, and ratios of rotamers in solution. Four additional new compounds, cloeziones A-C (2-4) and cloeperoxide (5), along with three known compounds were also isolated from E. cloeziana. The structures of all compounds were elucidated using HRMS and NMR analysis, and the absolute configurations for 2-4 were determined by comparison of TDDFT-calculated and experimental ECD data. Compounds 1-3 displayed antiplasmodial activities between IC50 6.6 and 16 μM. The α-syn inhibitory and antiplasmodial activity of myrtucommulone P (1) supports the hypothesized link between antiamyloidogenic and antiplasmodial activity.
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Affiliation(s)
- Dale W Prebble
- School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland 4111, Australia
| | - Darren C Holland
- School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland 4111, Australia
| | - Francesca Ferretti
- School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland 4111, Australia
| | - Joshua B Hayton
- School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland 4111, Australia
| | - Vicky M Avery
- School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland 4111, Australia
- Discovery Biology, Centre for Cellular Phenomics, Griffith University, Brisbane, Queensland 4111, Australia
- Infectious Diseases and Immunology, Menzies Health Institute Queensland, Griffith University, Gold Coast, Queensland 4111, Australia
| | - George D Mellick
- School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland 4111, Australia
| | - Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland 4111, Australia
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Rivai B, Umar AK. Neuroprotective compounds from marine invertebrates. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2023; 12:71. [DOI: 10.1186/s43088-023-00407-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 07/22/2023] [Indexed: 09/01/2023] Open
Abstract
Abstract
Background
Neuroinflammation is a key pathological feature of a wide variety of neurological disorders, including Parkinson’s, multiple sclerosis, Alzheimer’s, and Huntington’s disease. While current treatments for these disorders are primarily symptomatic, there is a growing interest in developing new therapeutics that target the underlying neuroinflammatory processes.
Main body
Marine invertebrates, such as coral, sea urchins, starfish, sponges, and sea cucumbers, have been found to contain a wide variety of biologically active compounds that have demonstrated potential therapeutic properties. These compounds are known to target various key proteins and pathways in neuroinflammation, including 6-hydroxydopamine (OHDH), caspase-3 and caspase-9, p-Akt, p-ERK, p-P38, acetylcholinesterase (AChE), amyloid-β (Aβ), HSF-1, α-synuclein, cellular prion protein, advanced glycation end products (AGEs), paraquat (PQ), and mitochondria DJ-1.
Short conclusion
This review focuses on the current state of research on the neuroprotective effects of compounds found in marine invertebrates and the potential therapeutic implications of these findings for treating neuroinflammatory disorders. We also discussed the challenges and limitations of using marine-based compounds as therapeutics, such as sourcing and sustainability concerns, and the need for more preclinical and clinical studies to establish their efficacy and safety.
Graphical abstract
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Smith JK, Mellick GD, Sykes AM. The role of the endolysosomal pathway in α-synuclein pathogenesis in Parkinson's disease. Front Cell Neurosci 2023; 16:1081426. [PMID: 36704248 PMCID: PMC9871505 DOI: 10.3389/fncel.2022.1081426] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 12/12/2022] [Indexed: 01/11/2023] Open
Abstract
Parkinson's disease (PD) is a chronic neurodegenerative disease that is characterized by a loss of dopaminergic neurons in the substantia nigra pars compacta of the midbrain (SNpc). Extensive studies into genetic and cellular models of PD implicate protein trafficking as a prominent contributor to the death of these dopaminergic neurons. Considerable evidence also suggests the involvement of α-synuclein as a central component of the characteristic cell death in PD and it is a major structural constituent of proteinaceous inclusion bodies (Lewy bodies; LB). α-synuclein research has been a vital part of PD research in recent years, with newly discovered evidence suggesting that α-synuclein can propagate through the brain via prion-like mechanisms. Healthy cells can internalize toxic α-synuclein species and seed endogenous α-synuclein to form large, pathogenic aggregates and form LBs. A better understanding of how α-synuclein can propagate, enter and be cleared from the cell is vital for therapeutic strategies.
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Abstract
Covering: 2020This review covers the literature published in 2020 for marine natural products (MNPs), with 757 citations (747 for the period January to December 2020) 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 (1407 in 420 papers for 2020), together with the relevant biological activities, source organisms and country of origin. Pertinent reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. A meta analysis of bioactivity data relating to new MNPs reported over the last five years is also presented.
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Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. .,Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia.,School of Enivironment and Science, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
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Prebble DW, Er S, Xu M, Hlushchuk I, Domanskyi A, Airavaara M, Ekins MG, Mellick GD, Carroll AR. α-synuclein aggregation inhibitory activity of the bromotyrosine derivatives aerothionin and aerophobin-2 from the subtropical marine sponge Aplysinella sp. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Prebble DW, Xu M, Mellick GD, Carroll AR. Sycosterol A, an α-Synuclein Inhibitory Sterol from the Australian Ascidian Sycozoa cerebriformis. JOURNAL OF NATURAL PRODUCTS 2021; 84:3039-3043. [PMID: 34787419 DOI: 10.1021/acs.jnatprod.1c00768] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
During a recent biodiscovery study to identify new α-synuclein (α-syn) aggregation inhibitors, we screened 29 Australian marine sponge and ascidian extracts in an MS binding assay. This resulted in an extract from the ascidian Sycozoa cerebriformis showing activity toward α-syn. The bioassay and MS guided isolation process led to the identification of one new polyoxygenated sterol sulfate, sycosterol A (1). The structure of this low-yielding steroid was elucidated from HRMS and NMR analysis. Sycosterol A displayed moderate antiaggregation activity with 46.2% (±1.8) inhibition when screened against α-syn at a 5:1 (sycosterol A:α-syn) molar ratio. The α-syn antiaggregation activity displayed by 1 and the recent discovery of similar sterols with α-syn antiaggregation activity and potent antiprion activity suggest this unique class may be useful antineurodegenerative compounds.
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Affiliation(s)
- Dale W Prebble
- School of Environment and Science, Griffith University (Gold Coast Campus), Parklands Drive, Southport, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University (Brisbane Innovation Park), Don Young Road, Nathan, QLD 4111, Australia
| | - Mingming Xu
- Griffith Institute for Drug Discovery, Griffith University (Brisbane Innovation Park), Don Young Road, Nathan, QLD 4111, Australia
| | - George D Mellick
- School of Environment and Science, Griffith University (Gold Coast Campus), Parklands Drive, Southport, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University (Brisbane Innovation Park), Don Young Road, Nathan, QLD 4111, Australia
| | - Anthony R Carroll
- School of Environment and Science, Griffith University (Gold Coast Campus), Parklands Drive, Southport, QLD 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University (Brisbane Innovation Park), Don Young Road, Nathan, QLD 4111, Australia
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Hiranrat A, Holland DC, Mahabusarakam W, Hooper JNA, Avery VM, Carroll AR. Tedaniophorbasins A and B-Novel Fluorescent Pteridine Alkaloids Incorporating a Thiomorpholine from the Sponge Tedaniophorbas ceratosis. Mar Drugs 2021; 19:md19020095. [PMID: 33562248 PMCID: PMC7915533 DOI: 10.3390/md19020095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 02/02/2021] [Accepted: 02/03/2021] [Indexed: 11/30/2022] Open
Abstract
Two new fluorescent pteridine alkaloids, tedaniophorbasins A (1) and B (2), together with the known alkaloid N-methyltryptamine, were isolated, through application of mass directed purification, from the sponge Tedaniophorbas ceratosis collected from northern New South Wales, Australia. The structures of tedaniophorbasins A and B were deduced from the analysis of 1D/2D NMR and MS data and through application of 13C NMR DFT calculations. Tedaniophorbasin A possesses a novel 2-imino-1,3-dimethyl-2,3,7,8-tetrahydro-1H-[1,4]thiazino[3,2-g]pteridin-4(6H)-one skeleton, while tedaniophorbasin B is its 2-oxo derivative. The compounds show significant Stokes shifts (~14,000 cm−1) between excitation and emission wavelengths in their fluorescence spectra. The new compounds were tested for bioactivity against chloroquine-sensitive and chloroquine-resistant strains of the malaria parasite Plasmodium falciparum, breast and pancreatic cancer cell lines, and the protozoan parasite Trypanosoma brucei brucei but were inactive against all targets at 40 µM.
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Affiliation(s)
- Asadhawut Hiranrat
- School of Environment and Science, Griffith University, Gold Coast, QLD 4222, Australia; (A.H.); (D.C.H.)
- Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand;
- Natural Products Research Center, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Darren C. Holland
- School of Environment and Science, Griffith University, Gold Coast, QLD 4222, Australia; (A.H.); (D.C.H.)
- Griffith Institute for Drug Discovery Institute, Griffith University, Brisbane, QLD 4111, Australia; (J.N.A.H.); (V.M.A.)
| | - Wilawan Mahabusarakam
- Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand;
- Natural Products Research Center, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - John N. A. Hooper
- Griffith Institute for Drug Discovery Institute, Griffith University, Brisbane, QLD 4111, Australia; (J.N.A.H.); (V.M.A.)
- Queensland Centre for Biodiversity, Queensland Museum, South Brisbane, QLD 4101, Australia
| | - Vicky M. Avery
- Griffith Institute for Drug Discovery Institute, Griffith University, Brisbane, QLD 4111, Australia; (J.N.A.H.); (V.M.A.)
- Discovery Biology, Griffith University, Nathan, QLD 4111, Australia
| | - Anthony R. Carroll
- School of Environment and Science, Griffith University, Gold Coast, QLD 4222, Australia; (A.H.); (D.C.H.)
- Griffith Institute for Drug Discovery Institute, Griffith University, Brisbane, QLD 4111, Australia; (J.N.A.H.); (V.M.A.)
- Correspondence: ; Tel.: +61-7-5552-9187; Fax: +61-7-5552-9047
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