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Sun M, Abdelwahab MF, Zhang J, Samy MN, Mohamed NM, Abdel-Rahman IM, Alsenani F, Abdelmohsen UR, Mahmoud BK. Cytotoxic metabolites from Sinularia levi supported by network pharmacology. PLoS One 2024; 19:e0294311. [PMID: 38319945 PMCID: PMC10846738 DOI: 10.1371/journal.pone.0294311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 10/29/2023] [Indexed: 02/08/2024] Open
Abstract
The in-vitro anti-proliferative evaluation of Sinularia levi total extract against three cell lines revealed its potent effect against Caco-2 cell line with IC50 3.3 μg/mL, followed by MCF-7 and HepG-2 with IC50 6.4 μg/mL and 8.5 μg/mL, respectively, in comparison to doxorubicin. Metabolic profiling of S. levi total extract using liquid chromatography coupled with high-resolution electrospray ionization mass spectrometry (LC-HR-ESI-MS) revealed the presence of phytoconstituents clusters consisting mainly of steroids and terpenoids (1-20), together with five metabolites 21-25, which were additionally isolated and identified through the phytochemical investigation of S. levi total extract through various chromatographic and spectroscopic techniques. The isolated metabolites included one sesquiterpene, two steroids and two diterpenes, among which compounds prostantherol (21) and 12-hydroperoxylsarcoph-10-ene (25) were reported for the first time in Sinularia genus. The cytotoxic potential evaluation of the isolated compounds revealed variable cytotoxic effects against the three tested cell lines. Compound 25 was the most potent with IC50 value of 2.13 ± 0.09, 3.54 ± 0.07 and 5.67 ± 0.08 μg/mL against HepG-2, MCF-7 and Caco-2, respectively, followed by gorgosterol (23) and sarcophine (24). Additionally, network analysis showed that cyclin-dependent kinase 1 (CDK1) was encountered in the mechanism of action of the three cancer types. Molecular docking analysis revealed that CDK1 inhibition could possibly be the reason for the cytotoxic potential.
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Affiliation(s)
- Mingna Sun
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, The NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Miada F. Abdelwahab
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Jianye Zhang
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, The NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Mamdouh Nabil Samy
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Nada M. Mohamed
- Department of Pharmaceutical Chemistry, Modern University for Technology and Information (MTI), Cairo, Egypt
| | - Islam M. Abdel-Rahman
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Deraya University, New-Minia, Minia, Egypt
| | - Faisal Alsenani
- Department of Pharmacognosy, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, New Minia, Egypt
| | - Basma Khalaf Mahmoud
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
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2
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Holland I, Bakri YM, Sakoff J, Zaleta Pinet D, Motti C, van Altena I. Bioactive α,β-conjugated 3-keto-steroids from the Australian brown alga Cystophora xiphocarpa. PHYTOCHEMISTRY 2021; 188:112798. [PMID: 34020274 DOI: 10.1016/j.phytochem.2021.112798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 04/24/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
As part of our ongoing study of the specialised metabolites present in brown algae belonging to the Cystophora genus, eight new steroids including three pairs of diastereoisomers were isolated from Cystophora xiphocarpa (Harvey) (Sargassacea, Fucales). The metabolites identified by standard spectrometric methods are (16S,22S)-16,22-dihydroxyergosta-4,24(28)-dien-3-one and (16S,22R)-16,22-dihydroxyergosta-4,24(28)-dien-3-one, (16S,22S,24R)-16,22,24-trihydroxyporifera-4,28-dien-3-one and (16S,22S,24S)-16,22,24-trihydroxystigma-4,28-dien-3-one along with (16S,22S,24E)-16,22-dihydroxystigma-4,24(28)-dien-3-one and (16S,20S)-16,20-dihydroxyergosta-4,24(28)-dien-3-one. (16S,22S,24E)-16,22-Dihydroxystigma-4,24(28)-dien-3-one possessed the most potent cytotoxicity of the steroids in this series with cell growth inhibitions of GI50 8.7 ± 0.7 μM against colon cancer HT29, GI50 5.6 ± 0.8 μM against the breast cancer line MCF-7 and GI50 4.5 ± 0.2 μM against the ovarian cancer cell line A2780. (16S,22R)-16,22-dihydroxyergosta-4,24(28)-dien-3-one was found to be active against the ovarian cancer cell line A2780 with a GI50 of 6.2 ± 0.1 μM.
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Affiliation(s)
- Ian Holland
- Chemistry, School of Environmental and Life Sciences, Faculty of Science, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Yuhanis Mhd Bakri
- Chemistry, School of Environmental and Life Sciences, Faculty of Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim, 35900, Perak, Malaysia
| | - Jennette Sakoff
- Chemistry, School of Environmental and Life Sciences, Faculty of Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Department of Medical Oncology, Calvary Mater Newcastle Hospital, NSW, 2298, Australia
| | - Diana Zaleta Pinet
- Chemistry, School of Environmental and Life Sciences, Faculty of Science, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Cheri Motti
- Australian Institute of Marine Science, PMB 3, Townsville MC, 4810, QLD, Australia
| | - Ian van Altena
- Chemistry, School of Environmental and Life Sciences, Faculty of Science, The University of Newcastle, Callaghan, NSW, 2308, Australia.
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3
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Nguyen HM, Ito T, Win NN, Vo HQ, Nguyen HT, Morita H. A new sterol from the Vietnamese marine sponge Xestospongia testudinaria and its biological activities. Nat Prod Res 2018; 33:1175-1181. [DOI: 10.1080/14786419.2018.1465057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Hien Minh Nguyen
- Institute of Natural Medicine, University of Toyama , Toyama, Japan
| | - Takuya Ito
- Institute of Natural Medicine, University of Toyama , Toyama, Japan
| | - Nwet Nwet Win
- Institute of Natural Medicine, University of Toyama , Toyama, Japan
- Department of Chemistry, University of Yangon , Yangon, Myanmar
| | - Hung Quoc Vo
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University , Hue City, Vietnam
| | - Hoai Thi Nguyen
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University , Hue City, Vietnam
| | - Hiroyuki Morita
- Institute of Natural Medicine, University of Toyama , Toyama, Japan
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Ngoc NT, Huong PTM, Thanh NV, Chi NTP, Dang NH, Cuong NX, Nam NH, Thung DC, Kiem PV, Minh CV. Cytotoxic Steroids from the Vietnamese Soft Coral Sinularia conferta. Chem Pharm Bull (Tokyo) 2017; 65:300-305. [PMID: 28077809 DOI: 10.1248/cpb.c16-00881] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Twelve steroids, including five new compounds 1-5, were isolated and structurally elucidated from a methanol extract of the Vietnamese soft coral Sinularia conferta. Their cytotoxic effects against three human cancer cell lines, lung carcinoma (A-549), cervical adenocarcinoma (HeLa), and pancreatic epithelioid carcinoma (PANC-1), were evaluated using 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide (MTT) assays. Among isolated compounds, 10 exhibited potent cytotoxic effects on all three tested cell lines with IC50 values of 3.64±0.18, 19.34±0.42, and 1.78±0.69 µM, respectively.
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Affiliation(s)
- Ninh Thi Ngoc
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
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5
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Thanh NV, Ngoc NT, Anh HLT, Thung DC, Thao DT, Cuong NX, Nam NH, Kiem PV, Minh CV. Steroid constituents from the soft coral Sinularia microspiculata. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2016; 18:938-944. [PMID: 27151101 DOI: 10.1080/10286020.2016.1173676] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 03/28/2016] [Indexed: 06/05/2023]
Abstract
A methanol extract of the soft coral Sinularia microspiculata revealed five sterols, including two new compounds. Using combined chromatographic and spectroscopic experiments, the new compounds were found to be 7-oxogorgosterol (1) and 16α-hydroxysarcosterol (2). Their structures were determined on the basis of spectroscopic data ((1)H and (13)C NMR, HSQC, HMBC, (1)H-(1)H COSY, NOESY, and FT-ICR-MS) and by comparing obtained results to the values indicated in previous studies. Among the isolated compounds, 3 showed weak cytotoxic effects against HL-60 (IC50 = 89.02 ± 9.93 μM) cell line, whereas 5 was weakly active against HL-60 (IC50 = 82.80 ± 13.65 μM) and SK-Mel2 (IC50 = 72.32 ± 1.30 μM) cell lines.
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Affiliation(s)
- Nguyen Van Thanh
- a Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam
| | - Ninh Thi Ngoc
- a Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam
| | - Hoang Le Tuan Anh
- a Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam
| | - Do Cong Thung
- b Institute of Marine Environment and Resources (IMER), VAST , Haiphong , Vietnam
| | - Do Thi Thao
- c Institute of Biotechnology (IBT), VAST , Hanoi , Vietnam
| | - Nguyen Xuan Cuong
- a Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam
| | - Nguyen Hoai Nam
- a Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam
| | - Phan Van Kiem
- a Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam
| | - Chau Van Minh
- a Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam
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6
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Cheng Z, Liu D, de Voogd NJ, Proksch P, Lin W. New Sterol Derivatives from the Marine SpongeXestospongiasp. Helv Chim Acta 2016. [DOI: 10.1002/hlca.201600021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhongbin Cheng
- State Key Laboratory of Natural and Biomimetic Drugs; Institute of Ocean Research; Peking University; Beijing 100191 P. R. China
| | - Dong Liu
- State Key Laboratory of Natural and Biomimetic Drugs; Institute of Ocean Research; Peking University; Beijing 100191 P. R. China
| | - Nicole J. de Voogd
- Department Marine Zoology; Naturalis Biodiversity Center; Darwinweg 2 2333 CR Leiden The Netherlands
| | - Peter Proksch
- Institute für Pharmazeutische Biologie und Biotechnologie; Heinrich-Heine - Universität Düsseldorf; 40225 Düsseldorf Germany
| | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs; Institute of Ocean Research; Peking University; Beijing 100191 P. R. China
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7
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Hanh TTH, Vien LT, Vinh LB, Thanh NV, Cuong NX, Nam NH, Thung DC, Kiem PV, Minh CV. Further Highly Hydroxylated Steroids from the Vietnamese Starfish Archaster typicus. Chem Pharm Bull (Tokyo) 2016; 64:1523-1527. [DOI: 10.1248/cpb.c16-00445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Tran Thi Hong Hanh
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
| | - Le Thi Vien
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
| | - Le Ba Vinh
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
| | - Nguyen Van Thanh
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
| | - Nguyen Xuan Cuong
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
| | - Nguyen Hoai Nam
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
| | | | - Phan Van Kiem
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
| | - Chau Van Minh
- Advanced Center for Bioorganic Chemistry, Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
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8
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Wang W, Lee TG, Patil RS, Mun B, Yang I, Kim H, Hahn D, Won DH, Lee J, Lee Y, Choi H, Nam SJ, Kang H. Monanchosterols A and B, bioactive bicyclo[4.3.1]steroids from a Korean sponge Monanchora sp. JOURNAL OF NATURAL PRODUCTS 2015; 78:368-373. [PMID: 25455409 DOI: 10.1021/np500760v] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Chemical investigation of a Korean marine sponge, Monanchora sp., led to the isolation of three new steroids (1-3). Compounds 1 and 2, designated as monanchosterols A and B, respectively, represent the first examples of steroids possessing the bicyclo[4.3.1] A/B ring system from a natural source. Compounds 1-3 were investigated for their anti-inflammatory activity by evaluating their inhibitory effects on the mRNA expression of IL-6, TNF-α, and COX-2 in the LPS-stimulated murine RAW264.7 macrophage cells. Compounds 2 and 3 exhibited significant inhibitory effects on the mRNA expression of IL-6 without notable cytotoxicity to the cells in a dose-dependent manner.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Hyukjae Choi
- ‡College of Pharmacy, Yeungnam University, 214-1 Dae-dong, Gyeongsan, 712-749, Korea
| | - Sang-Jip Nam
- §Department of Chemistry and Nano Science, Global Top 5 Program, Ewha Womans University, Seoul, 120-750, Korea
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9
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Bioactive Steroids from a Marine-Derived Fungus Penicillium sp. from the South China Sea. Chem Nat Compd 2014. [DOI: 10.1007/s10600-014-1020-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Thao NP, Cuong NX, Luyen BTT, Nam NH, Cuong PV, Thanh NV, Nhiem NX, Hanh TTH, Kim EJ, Kang HK, Kiem PV, Minh CV, Kim YH. Steroidal constituents from the starfish Astropecten polyacanthus and their anticancer effects. Chem Pharm Bull (Tokyo) 2014; 61:1044-51. [PMID: 24088696 DOI: 10.1248/cpb.c13-00490] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Using various chromatographic methods, four new steroids, astropectenols A-D (1-4), along with three known compounds (5-7) were isolated from a methanol extract of the starfish Astropecten polyacanthus. The structure elucidation was confirmed by spectroscopic methods, including one dimensional (1D)-, 2D-NMR and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). The CH2Cl2 fraction and compound 7 exhibit potent cytotoxic effects against HL-60 human leukemia cells with the IC50 of 8.29 µg/mL and 2.70 µM, respectively, comparing to the positive control, mitoxantrone (IC50=6.80 µM). When HL-60 cells were treated with the CH₂Cl₂ fraction or compound 7, several apoptosis events like chromatin condensation and the increase of the population of sub-G1 hypodiploid cells were observed. Investigations for the possible mechanism underlying the induction of apoptosis showed that CH₂Cl₂ fraction or compound 7 induced apoptosis through down-regulation of Bcl-2, up-regulation of Bax, cleavage of caspase-9, cleavage of caspase-3 and cleavage of poly(ADP-ribose) polymerase (PARP) in HL-60 cells. Furthermore, the apoptosis induction of HL-60 cell by CH₂Cl₂ fraction or compound 7 was attended by the decreasing of phospho-extracellular signal-regulated kinase (ERK) 1/2 and C-myc. These results indicated that the CH₂Cl₂ fraction and compound 7 could induce the apoptosis of HL-60 cells via the inactivation of ERK 1/2 and the decrease of C-myc. Our finding suggested the potential using of the CH₂Cl₂ fraction and compound 7 for leukemia treatment.
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Affiliation(s)
- Nguyen Phuong Thao
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST)
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11
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Nguyen XC, Longeon A, Pham VC, Urvois F, Bressy C, Trinh TTV, Nguyen HN, Phan VK, Chau VM, Briand JF, Bourguet-Kondracki ML. Antifouling 26,27-cyclosterols from the Vietnamese marine sponge Xestospongia testudinaria. JOURNAL OF NATURAL PRODUCTS 2013; 76:1313-1318. [PMID: 23829580 DOI: 10.1021/np400288j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Three new C29 sterols with a cyclopropane ring cyclized between C-26 and C-27 of the side chain, aragusterol I (1), 21-O-octadecanoyl-xestokerol A (4), and 7β-hydroxypetrosterol (5b), were isolated from the Vietnamese marine sponge Xestospongia testudinaria, along with the known compounds, aragusterol B (2), xestokerol A (3), 7α-hydroxypetrosterol (5a), 7-oxopetrosterol (6), and petrosterol (7). The structures of the new compounds were established by analysis of spectroscopic data including 1D and 2D NMR, and high-resolution electrospray ionization mass spectrometry (HRESIMS). Their capacity to inhibit the adhesion of isolated bacteria from marine biofilms was evaluated against the bacterial strains Pseudoalteromonas sp. D41, Pseudoalteromonas sp. TC8, and Polaribacter sp. TC5. Aragusterol B (2) and 21-O-octadecanoyl-xestokerol A (4) exhibited the most potent antifouling activity with EC50 values close to these reported in the literature for tributyltin oxide, a marine anti-biofouling agent now considered to be a severe marine pollutant. Due to its comparable activity to tributyltin oxide and its absence of toxicity, the new 26,27-cyclosterol, 21-O-octadecanoyl-xestokerol A (4) constitutes a promising scaffold for further investigations.
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Affiliation(s)
- Xuan Cuong Nguyen
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam
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12
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Nguyen PT, Nguyen HN, Nguyen XC, Bui HT, Tran HQ, Nguyen TTN, Bui TTL, Yang SY, Choi CH, Kim S, Chae D, Koh YS, Phan VK, Chau VM, Kim YH. Steroidal Constituents from the Soft Coral Sinularia dissecta and Their Inhibitory Effects on Lipopolysaccharide-Stimulated Production of Pro-inflammatory Cytokines in Bone Marrow-Derived Dendritic Cells. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.3.949] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Zhou X, Xu T, Yang XW, Huang R, Yang B, Tang L, Liu Y. Chemical and Biological Aspects of Marine Sponges of the Genus Xestospongia. Chem Biodivers 2010; 7:2201-27. [DOI: 10.1002/cbdv.201000024] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Holland IP, McCluskey A, Sakoff JA, Gilbert J, Chau N, Robinson PJ, Motti CA, Wright AD, van Altena IA. Steroids from an Australian sponge Psammoclema sp. JOURNAL OF NATURAL PRODUCTS 2009; 72:102-106. [PMID: 19132863 DOI: 10.1021/np800688f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Investigation of an extract of the Australian marine sponge Psammoclema sp. for dynamin I inhibitory activity led to the isolation of four new trihydroxysterols (1-4) related to aragusterol G. These compounds were largely identified by 1D and 2D NMR spectroscopic methods. While 1 was found to be inactive in the dynamin bioassay, bioassays did reveal that compounds 1-4 inhibited the growth of colorectal, breast, ovarian, and prostate cancer cell lines (GI(50) 5-27 microM). The additional insight that these new compounds give to previous SAR studies is discussed briefly.
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Affiliation(s)
- Ian P Holland
- Chemistry, School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia
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15
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Rodríguez Brasco MF, Genzano GN, Palermo JA. New C-secosteroids from the gorgonian Tripalea clavaria. Steroids 2007; 72:908-13. [PMID: 17889913 DOI: 10.1016/j.steroids.2007.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2007] [Revised: 07/25/2007] [Accepted: 07/27/2007] [Indexed: 02/01/2023]
Abstract
Seven new C-secosteroids were isolated from the gorgonian Tripalea clavaria collected from the South Atlantic. These compounds have a Delta(5), 9,11-secosteroid nucleus together with a 22S hydroxyl group. The absolute configuration of the 22-hydroxyl group was determined with the help of COSY spectra of the Mosher esters of the compounds.
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Affiliation(s)
- María F Rodríguez Brasco
- UMYMFOR-Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab 2 (1428), Buenos Aires, Argentina
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16
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Luo X, Li F, Shinde PB, Hong J, Lee CO, Im KS, Jung JH. 26,27-cyclosterols and other polyoxygenated sterols from a marine sponge Topsentia sp. JOURNAL OF NATURAL PRODUCTS 2006; 69:1760-8. [PMID: 17190456 DOI: 10.1021/np0604026] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Thirty sterols (1-30) were isolated from bioactive fractions of a marine sponge Topsentia sp., of which 16 were new (1, 2, 8, 10-14, 16, 17, 19, 21, 24, 25, 27, and 30). They were characterized as sterols with 10 different side chains and as having various functionalities including 5alpha,8alpha-epidioxy (1-9), 5alpha,6alpha-epoxy-7-ol (10-15), 5,8-dien-7-one (24-28), 5-en-3beta-ol (29), and 1(10-->6)abeo-5,7,9-triene-3alpha,11alpha-diol (30) units and included polyoxygenated sterols (16-23). One of the key features of these new sterols is the presence of the (24R,25R,27R)-26,27-cyclo-24,27-dimethylcholestane side chain, whose absolute stereochemistry was defined by an acid-catalyzed ring-opening method and by comparison with the four synthetic isomers of known absolute stereochemistry. The occurrence of several known fungal sterols and relevant new sterols in this sponge suggested their possible origin from symbiotic fungi. Selected compounds were tested against a panel of five human solid tumor cell lines and displayed moderate to marginal cytotoxicity.
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Affiliation(s)
- Xuan Luo
- College of Pharmacy, Pusan National University, Busan 609-735, Korea
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17
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Venkateswarlu Y, Ramesh P, Reddy NS, Rao TP. A Novel Polyhydroxylated Epoxy Steriod From the Soft Coral Sinularia Sp. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10575639908048484] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Y. Venkateswarlu
- a Natural Product Laboratory, Organic Chemistry Division-1 Indian Institute of Chemical Technology , Hyderabad , 500 007 , India
| | - P. Ramesh
- a Natural Product Laboratory, Organic Chemistry Division-1 Indian Institute of Chemical Technology , Hyderabad , 500 007 , India
| | - N. Srinivasa Reddy
- a Natural Product Laboratory, Organic Chemistry Division-1 Indian Institute of Chemical Technology , Hyderabad , 500 007 , India
| | - T. Prabhakara Rao
- a Natural Product Laboratory, Organic Chemistry Division-1 Indian Institute of Chemical Technology , Hyderabad , 500 007 , India
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19
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Williams JR, Gong H, Hoff N, Olubodun OI, Carroll PJ. α-Hydroxylation at C-15 and C-16 in Cholesterol: Synthesis of (25R)-5α-Cholesta-3β,15α,26-triol and (25R)-5α-Cholesta-3β,16α,26-triol from Diosgenin. Org Lett 2003; 6:269-71. [PMID: 14723545 DOI: 10.1021/ol036257u] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] (25R)-5alpha-cholesta-3beta,16alpha,26-triol 7b and (25R)-5alpha-cholesta-3beta,15alpha,26-triol 10b were synthesized, via (25R)-5alpha-cholesta-3beta,16beta,26-triol 5a, from diosgenin 3 in 52% yield over six steps and 47% yield over eight steps, respectively. An efficient method for inversion of a C-16beta hydroxyl to the C-16alpha position and a short method for transposition of a C-16beta hydroxyl to the C-15alpha position via the unexpected beta-reduction of a C-15 ketone in a steroid are reported.
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Affiliation(s)
- John R Williams
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122-2585, USA.
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20
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Mitome H, Shinohara M, Miyaoka H, Yamada Y. Synthesis and anti-tumor activity of new steroidal nuclear analogues of aragusterol A. Chem Pharm Bull (Tokyo) 2003; 51:640-5. [PMID: 12808239 DOI: 10.1248/cpb.51.640] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
3alpha,7alpha-Dihydroxy-5-epiaragusterol A (3) was synthesized from bile acid (cholic acid) as a new steroidal nuclear analogue of antitumor marine steroid aragusterol A. 7alpha-Hydroxyaragusterol A (4) was also derived from xestokerol B. The in vitro anti-proliferative activity of each of these analogues toward KB cells as well as in vivo anti-tumor activity of 5-epiaragusterol A (2) previously synthesized by the authors and 3 were assessed.
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Affiliation(s)
- Hidemichi Mitome
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Tokyo, Japan
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21
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Abstract
This paper describes the discovery and total synthesis of bioactive marine natural products conducted in our laboratory. Clavulone, chlorovulone, bromovulone, and iodovulone are antitumor marine prostanoids isolated from the Okinawan soft coral Clavularia viridis. The synthesis of clavulone and chlorovulone was achieved from chiral 4-hydroxy-2-cyclopentenone. Marine prostanoid punaglandins 3 and 4 were synthesized via similar methodology. The chemical structures of punaglandins 3 and 4 were revised by these syntheses. Dollaberane-type diterpenoid stolonidiol and claenone were isolated from Okinawan soft coral Clavularia sp. Stolonidiol showed potent choline acetyltransferase-inducible activity in cultured basal forebrain cells. The synthesis of stolondiol and claenone was conducted via sequential Michael reaction and retro-aldol reaction. Aragusterols, isolated from the Okinawan marine sponge Xestospongia sp., are structurally unique steroids possessing a rare 26,27-cyclo structure in the side chain. Aragusterols express potent in vivo antitumor activity against L1210 leukemia in mice. The synthesis of aragusterols was carried out via steroselective construction of the side chain and stereocontrolled coupling reaction with the steroid skeleton. Kalihinane-type diterpenoid kalihinol A, isolated by Scheuer, has remarkable in vitro antimalarial activity. The absolute configuration of kalihinol A was determined by applying the CD exciton chiral method. Synthesis of kalihinene X, a kalihinane-type diterpenoid, was achieved. This synthesis involves the regioselective coupling reaction of carbanion of alkyl sulfone with epoxyalcohol and construction of cis-decalin by an intramolecular Diels-Alder reaction.
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Affiliation(s)
- Yasuji Yamada
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan.
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22
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Miyaoka H, Yamada Y. Total Synthesis of Bioactive Marine Terpenoids. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2002. [DOI: 10.1246/bcsj.75.203] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Mitome H, Miyaoka H, Yamada Y. Synthesis of the optically active bicyclo[4.3.0]nonane derivative, regarded as the CD ring moiety of 12-oxygenated steroids. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)01413-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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Ramesh P, Reddy VL, Reddy NS, Venkateswarlu Y. Synthesis of melithasterol A, a 5alpha,6alpha-epoxy-7alpha-hydroxy Delta(8)-steroid. JOURNAL OF NATURAL PRODUCTS 2000; 63:1420-1421. [PMID: 11076567 DOI: 10.1021/np000095i] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A short, first synthesis of melithasterol A (3) utilizing microwave irradiation-induced isomerization of 5alpha,8alpha-epidioxy steroid (1) as the key step has been achieved in 80% yield.
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Affiliation(s)
- P Ramesh
- Natural Products Laboratory, Organic Division-I, Indian Institute of Chemical Technology, Hyderabad, 500 007, India
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25
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Abstract
Oxygenated derivatives of cholesterol (oxysterols) present a remarkably diverse profile of biological activities, including effects on sphingolipid metabolism, platelet aggregation, apoptosis, and protein prenylation. The most notable oxysterol activities center around the regulation of cholesterol homeostasis, which appears to be controlled in part by a complex series of interactions of oxysterol ligands with various receptors, such as the oxysterol binding protein, the cellular nucleic acid binding protein, the sterol regulatory element binding protein, the LXR nuclear orphan receptors, and the low-density lipoprotein receptor. Identification of the endogenous oxysterol ligands and elucidation of their enzymatic origins are topics of active investigation. Except for 24, 25-epoxysterols, most oxysterols arise from cholesterol by autoxidation or by specific microsomal or mitochondrial oxidations, usually involving cytochrome P-450 species. Oxysterols are variously metabolized to esters, bile acids, steroid hormones, cholesterol, or other sterols through pathways that may differ according to the type of cell and mode of experimentation (in vitro, in vivo, cell culture). Reliable measurements of oxysterol levels and activities are hampered by low physiological concentrations (approximately 0.01-0.1 microM plasma) relative to cholesterol (approximately 5,000 microM) and by the susceptibility of cholesterol to autoxidation, which produces artifactual oxysterols that may also have potent activities. Reports describing the occurrence and levels of oxysterols in plasma, low-density lipoproteins, various tissues, and food products include many unrealistic data resulting from inattention to autoxidation and to limitations of the analytical methodology. Because of the widespread lack of appreciation for the technical difficulties involved in oxysterol research, a rigorous evaluation of the chromatographic and spectroscopic methods used in the isolation, characterization, and quantitation of oxysterols has been included. This review comprises a detailed and critical assessment of current knowledge regarding the formation, occurrence, metabolism, regulatory properties, and other activities of oxysterols in mammalian systems.
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Affiliation(s)
- G J Schroepfer
- Departments of Biochemistry, Rice University, Houston, Texas, USA.
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26
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Miyaoka H, Nakano M, Iguchi K, Yamada Y. Three new xenicane diterpenoids from Okinawan soft coral of the genus, Xenia. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00806-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Abstract
Chemical examination of the soft coral Sinularia dissecta furnished five steroids (1-5), which include four new polyhydroxy steroids (2-5). The structures of new compounds have been established by the study of their spectral data. Steroid 5 was a novel polyoxygenated epoxy steroid.
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Affiliation(s)
- P Ramesh
- Natural Products Laboratory, Organic Division-I, Indian Institute of Chemical Technology, Hyderabad
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28
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Abstract
Two sponges from the Philippines, one a Xestospongia sp. (Haplosclerida, Petrosiidae) and the other an unidentified haplosclerid sponge, both contained the unusual steroidal sulfamate esters, haplosamates A (1) and B (2), the structures of which were determined by interpretation of spectral data. Haplosamates A (1) and B (2) inhibit HIV-1 integrase with IC50's of 50μg/mL and 15μg/mL, respectively.
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29
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Venkateswarlu Y, Ramesh P, Reddy NS, Rao TP. A Novel Polyhydroxylated Epoxy Steriod From the Soft Coral Sinularia Dissecta. ACTA ACUST UNITED AC 1999. [DOI: 10.1080/10575639908048790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Antimalarial activity of kalihinol A and new relative diterpenoids from the Okinawan sponge, Acanthella sp. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00818-7] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Synthesis and evaluation of ruthenium catalysts containing diamine-based ligands in olefin cyclopropanation. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00608-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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