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Rasapalli S, Huang Y, Sammeta VR, Alshehry R, Anver F, Golen JA, Krishnamoorthy S, Chavan SP. Diversity oriented total synthesis (DOTS) of pyridoquinazolinone alkaloids and their analogues. TETRAHEDRON CHEM 2024; 9:100062. [PMID: 39329156 PMCID: PMC11426416 DOI: 10.1016/j.tchem.2024.100062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 09/28/2024]
Abstract
A short diversity oriented total synthesis (DOTS) of substituted rutaecarpines, homo-luotonins, homo-vasicinone, homo-isaindigotones and homo-vasnetine has been achieved from the key tricyclic intermediate. The [6,6,6] tricyclic ketone, the mackinazolindione, was accessed from simple substrates i.e., quinazolinone diester obtained from the disubstituted anthranilamide which in turn was prepared from the coupling of amino acid ester and ethyl oxalyl chloride with isatoic anhydride and Dieckmann condensation chemistry.
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Affiliation(s)
- Sivappa Rasapalli
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, 285 Old Westport Rd, North Dartmouth, MA-02747, USA
| | - Yanchang Huang
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, 285 Old Westport Rd, North Dartmouth, MA-02747, USA
| | - Vamshikrishna Reddy Sammeta
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, 285 Old Westport Rd, North Dartmouth, MA-02747, USA
| | - Reem Alshehry
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, 285 Old Westport Rd, North Dartmouth, MA-02747, USA
| | - Fazmina Anver
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, 285 Old Westport Rd, North Dartmouth, MA-02747, USA
| | - James A Golen
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, 285 Old Westport Rd, North Dartmouth, MA-02747, USA
| | | | - Subhash P Chavan
- Organic Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
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Guo X, Fan A, Qi X, Liu D, Huang J, Lin W. Indoloquinazoline alkaloids suppress angiogenesis and inhibit metastasis of melanoma cells. Bioorg Chem 2023; 141:106873. [PMID: 37734192 DOI: 10.1016/j.bioorg.2023.106873] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 09/10/2023] [Accepted: 09/17/2023] [Indexed: 09/23/2023]
Abstract
Metastasis is the leading cause of cancer-related mortality, targeting angiogenesis emerges as a therapeutic strategy for the treatment of melanoma metastasis. Discovery of new antiangiogenic compounds with specific mechanism of action is still desired. In present study, a bioassay-guidance uncovers the EtOAc extract of a marine-derived fungus Aspergillus clavutus LZD32-24 with significant inhibitory activity against the angiogenesis in Tg (fli1a: EGFP) zebrafish model. Extensive chromatographic fractionation led to the isolation of 48 indoloquinazoline alkaloids, including 21 new analogues namely clavutoines A-U (1-21). Their structures were determined by the spectroscopic data, including the ECD, single crystal X-ray diffraction and quantum chemical calculation for the configurational assignments. Among the bioactive analogues, quinadoline B (QB) showed the most efficacy to suppress the zebrafish vascular outgrowth in zebrafish embryos. QB markedly inhibited the migration, invasion and tube formation with weak cytotoxicity in human umbilical vein endothelial cells (HUVECs). Investigation of the mode of action revealed QB suppressed the ROCK/MYPT1/MLC2/coffin and FAK /Src signaling pathways, and subsequently disrupted actin cytoskeletal organization. In addition, QB reduced the number of new vessels sprouting from the ex vivo chick chorioallantoic membrane (CAM), and inhibited the metastasis of B16F10 melanoma cells in lung of C57BL/6 mice through suppressing angiogenesis. These findings suggest that QB is a potential lead for the development of new antiangiogenic agent to inhibit melanoma metastasis.
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Affiliation(s)
- Xingchen Guo
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, PR China
| | - Aili Fan
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, PR China
| | - Xinyi Qi
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, PR China
| | - Dong Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, PR China
| | - Jian Huang
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, PR China.
| | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, PR China; Ningbo Institute of Marine Medicine, Peking University, Beijing 100191, PR China.
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Alkafaas SS, Abdallah AM, Hussien AM, Bedair H, Abdo M, Ghosh S, Elkafas SS, Apollon W, Saki M, Loutfy SA, Onyeaka H, Hessien M. A study on the effect of natural products against the transmission of B.1.1.529 Omicron. Virol J 2023; 20:191. [PMID: 37626376 PMCID: PMC10464336 DOI: 10.1186/s12985-023-02160-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
BACKGROUND The recent outbreak of the Coronavirus pandemic resulted in a successful vaccination program launched by the World Health Organization. However, a large population is still unvaccinated, leading to the emergence of mutated strains like alpha, beta, delta, and B.1.1.529 (Omicron). Recent reports from the World Health Organization raised concerns about the Omicron variant, which emerged in South Africa during a surge in COVID-19 cases in November 2021. Vaccines are not proven completely effective or safe against Omicron, leading to clinical trials for combating infection by the mutated virus. The absence of suitable pharmaceuticals has led scientists and clinicians to search for alternative and supplementary therapies, including dietary patterns, to reduce the effect of mutated strains. MAIN BODY This review analyzed Coronavirus aetiology, epidemiology, and natural products for combating Omicron. Although the literature search did not include keywords related to in silico or computational research, in silico investigations were emphasized in this study. Molecular docking was implemented to compare the interaction between natural products and Chloroquine with the ACE2 receptor protein amino acid residues of Omicron. The global Omicron infection proceeding SARS-CoV-2 vaccination was also elucidated. The docking results suggest that DGCG may bind to the ACE2 receptor three times more effectively than standard chloroquine. CONCLUSION The emergence of the Omicron variant has highlighted the need for alternative therapies to reduce the impact of mutated strains. The current review suggests that natural products such as DGCG may be effective in binding to the ACE2 receptor and combating the Omicron variant, however, further research is required to validate the results of this study and explore the potential of natural products to mitigate COVID-19.
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Affiliation(s)
- Samar Sami Alkafaas
- Molecular Cell Biology Unit, Division of Biochemistry, Department of Chemistry, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
| | - Abanoub Mosaad Abdallah
- Narcotic Research Department, National Center for Social and Criminological Research (NCSCR), Giza, 11561, Egypt
| | - Aya Misbah Hussien
- Biotechnology Department at Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Heba Bedair
- Botany Department, Faculty of Science, Tanta University, Tanta, Egypt
| | - Mahmoud Abdo
- Division of Biochemistry, Department of Chemistry, Faculty of Science, Tanta University, Tanta, 31527, Egypt
| | - Soumya Ghosh
- Department of Genetics, Faculty of Natural and Agricultural Sciences, University of the Free State, Bloemfontein, 9301, South Africa.
| | - Sara Samy Elkafas
- Production Engineering and Mechanical Design Department, Faculty of Engineering, Menofia University, Menofia, Egypt
| | - Wilgince Apollon
- Department of Agricultural and Food Engineering, Faculty of Agronomy, Universidad Autónoma de Nuevo León, Francisco Villa S/N, Ex-Hacienda El Canadá, 66050, General Escobedo, Nuevo León, Mexico
| | - Morteza Saki
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Samah A Loutfy
- Virology and Immunology Unit, Cancer Biology Department, National Cancer Institute, Cairo University, Cairo, Egypt
- Nanotechnology Research Center, British University, Cairo, Egypt
| | - Helen Onyeaka
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
| | - Mohamed Hessien
- Molecular Cell Biology Unit, Division of Biochemistry, Department of Chemistry, Faculty of Science, Tanta University, Tanta, 31527, Egypt
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Long XM, Zhu QF, Wang B, Chen GG, Li KY, He X, Liao SG, Xu GB. Chemical constituents of Aspergillus udagawae isolated from the soil of the Xingren coal areas and their antibacterial activities. Nat Prod Res 2023; 37:2841-2848. [PMID: 36282894 DOI: 10.1080/14786419.2022.2137798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 10/05/2022] [Accepted: 10/12/2022] [Indexed: 10/31/2022]
Abstract
A new helvolic acid derivative (1), together with nine known compounds (2-10) were isolated from the metabolites of Aspergillus udagawae MST1-10 with the bioassay-guided fractionation method. Their structures were identified on the basis of spectroscopic analysis. The absolute configuration of compound 1 was elucidated through NOESY and ECD spectra. Compound 2 displayed significant antibacterial activities against Stenotrophomonas maltophilia with MIC value of 2 μg/mL (Trimethoprim, MIC = 64 μg/mL), and with biofilm inhibition rates of 96.41%, 87.77%, and 41.70% at 4MIC, 2MIC, and MIC, respectively.
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Affiliation(s)
- Xing-Mei Long
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Ministry of Education, Guiyang, Guizhou, China
| | - Qin-Feng Zhu
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
| | - Bing Wang
- School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, China
| | - Guang-Gui Chen
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
| | - Kai-Yu Li
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
| | - Xun He
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
| | - Shang-Gao Liao
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Ministry of Education, Guiyang, Guizhou, China
| | - Guo-Bo Xu
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmacy, Guizhou Medical University, Guiyang, Guizhou, China
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM, Ministry of Education, Guiyang, Guizhou, China
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Oparina LA, Kolyvanov NA, Ushakov IA, Nikitina LP, Petrova OV, Sobenina LN, Petrushenko KB, Trofimov BA. Contributing to Biochemistry and Optoelectronics: Pyrrolo[1',2':2,3]imidazo[1,5- a]indoles and Cyclohepta[4,5]pyrrolo[1,2- c]pyrrolo[1,2- a]imidazoles via [3+2] Annulation of Acylethynylcycloalka[ b]pyrroles with Δ 1-Pyrrolines. Int J Mol Sci 2023; 24:ijms24043404. [PMID: 36834813 PMCID: PMC9959468 DOI: 10.3390/ijms24043404] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 02/02/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023] Open
Abstract
Available pyrrolylalkynones with tetrahydroindolyl, cycloalkanopyrrolyl, and dihydrobenzo[g]indolyl moieties, acylethynylcycloalka[b]pyrroles, are readily annulated with Δ1-pyrrolines (MeCN/THF, 70 °C, 8 h) to afford a series of novel pyrrolo[1',2':2,3]imidazo[1,5-a]indoles and cyclohepta[4,5]pyrrolo[1,2-c]pyrrolo[1,2-a]imidazoles functionalized with an acylethenyl group in up to an 81% yield. This original synthetic approach contributes to the arsenal of chemical methods promoting drug discovery. Photophysical studies show that some of the synthesized compounds, e.g., benzo[g]pyrroloimidazoindoles, are prospective candidates for TADF emitters of OLED.
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Oparina LA, Belyaeva KV, Kolyvanov NA, Ushakov IA, Gotsko MD, Sobenina LN, Vashchenko AV, Trofimov BA. Catalyst-Free Annulation of Acylethynylpyrroles with 1-Pyrrolines: A Straightforward Access to Tetrahydrodipyrrolo[1,2- a:1',2'- c]imidazoles. J Org Chem 2022; 87:9518-9531. [PMID: 35849567 DOI: 10.1021/acs.joc.2c00476] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Acylethynylpyrroles undergo facile (rt, MeCN or MeOH, 24-72 h) catalyst-free annulation with 1-pyrrolines to afford acylmethylenetetrahydrodipyrrolo[1,2-a:1',2'-c]imidazoles in up to 93% yield and 90% E-stereoselectivity of the olefin moiety.
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Affiliation(s)
- Ludmila A Oparina
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Kseniya V Belyaeva
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Nikita A Kolyvanov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Igor A Ushakov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Maxim D Gotsko
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Lyubov' N Sobenina
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Alexander V Vashchenko
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Boris A Trofimov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
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Li K, Chen S, Pang X, Cai J, Zhang X, Liu Y, Zhu Y, Zhou X. Natural products from mangrove sediments-derived microbes: Structural diversity, bioactivities, biosynthesis, and total synthesis. Eur J Med Chem 2022; 230:114117. [PMID: 35063731 DOI: 10.1016/j.ejmech.2022.114117] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/28/2021] [Accepted: 01/09/2022] [Indexed: 12/25/2022]
Abstract
The mangrove forests are a complex ecosystem, and the microbial communities in mangrove sediments play a critical role in the biogeochemical cycles of mangrove ecosystems. Mangrove sediments-derived microbes (MSM), as a rich reservoir of natural product diversity, could be utilized in the exploration of new antibiotics or drugs. To understand the structural diversity and bioactivities of the metabolites of MSM, this review for the first time provides a comprehensive overview of 519 natural products isolated from MSM with their bioactivities, up to 2021. Most of the structural types of these compounds are alkaloids, lactones, xanthones, quinones, terpenoids, and steroids. Among them, 210 compounds are obtained from bacteria, most of which are from Streptomyces, while 309 compounds are from fungus, especially genus Aspergillus and Penicillium. The pharmacological mechanisms of some representative lead compounds are well studied, revealing that they have important medicinal potentials, such as piericidins with anti-renal cell cancer effects, azalomycins with anti-MRSA activities, and ophiobolins as antineoplastic agents. The biosynthetic pathways of representative natural products from MSM have also been summarized, especially ikarugamycin, piericidins, divergolides, and azalomycins. In addition, the total synthetic strategies of representative secondary metabolites from MSM are also reviewed, such as piericidin A and borrelidin. This review provides an important reference for the research status of natural products isolated from MSM and the lead compounds worthy of further development, and reveals that MSM have important medicinal values and are worthy of further development.
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Affiliation(s)
- Kunlong Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Department of Emergency Medicine, Shandong Provincial Clinical Research Center for Emergency and Critical Care Medicine, Institute of Emergency and Critical Care Medicine of Shandong University, Chest Pain Center, Key Laboratory of Emergency and Critical Care Medicine of Shandong Province, Key Laboratory of Cardiopulmonary-Cerebral Resuscitation Research of Shandong Province, Shandong Provincial Engineering Laboratory for Emergency and Critical Care Medicine, The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese Ministry of Health and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Siqiang Chen
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China
| | - Xiaoyan Pang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Jian Cai
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Xinya Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Yonghong Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China
| | - Yiguang Zhu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Sanya Institute of Oceanology, SCSIO, Sanya, 572000, China.
| | - Xuefeng Zhou
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China.
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Singla RK, He X, Chopra H, Tsagkaris C, Shen L, Kamal MA, Shen B. Natural Products for the Prevention and Control of the COVID-19 Pandemic: Sustainable Bioresources. Front Pharmacol 2021; 12:758159. [PMID: 34925017 PMCID: PMC8671886 DOI: 10.3389/fphar.2021.758159] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 10/27/2021] [Indexed: 02/05/2023] Open
Abstract
Background: The world has been unprecedentedly hit by a global pandemic which broke the record of deadly pandemics that faced humanity ever since its existence. Even kids are well-versed in the terminologies and basics of the SARS-CoV-2 virus and COVID-19 now. The vaccination program has been successfully launched in various countries, given that the huge global population of concern is still far behind to be vaccinated. Furthermore, the scarcity of any potential drug against the COVID-19-causing virus forces scientists and clinicians to search for alternative and complementary medicines on a war-footing basis. Aims and Objectives: The present review aims to cover and analyze the etiology and epidemiology of COVID-19, the role of intestinal microbiota and pro-inflammatory markers, and most importantly, the natural products to combat this deadly SARS-CoV-2 virus. Methods: A primary literature search was conducted through PubMed and Google Scholar using relevant keywords. Natural products were searched from January 2020 to November 2020. No timeline limit has been imposed on the search for the biological sources of those phytochemicals. Interactive mapping has been done to analyze the multi-modal and multi-target sources. Results and Discussion: The intestinal microbiota and the pro-inflammatory markers that can serve the prognosis, diagnosis, and treatment of COVID-19 were discussed. The literature search resulted in yielding 70 phytochemicals and ten polyherbal formulations which were scientifically analyzed against the SARS-CoV-2 virus and its targets and found significant. Retrospective analyses led to provide information about 165 biological sources that can also be screened if not done earlier. Conclusion: The interactive analysis mapping of biological sources with phytochemicals and targets as well as that of phytochemical class with phytochemicals and COVID-19 targets yielded insights into the multitarget and multimodal evidence-based complementary medicines.
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Affiliation(s)
- Rajeev K. Singla
- Institutes for Systems Genetics, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
- iGlobal Research and Publishing Foundation, New Delhi, India
| | - Xuefei He
- Institutes for Systems Genetics, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Hitesh Chopra
- Chitkara College of Pharmacy, Chitkara University, Rajpura, India
| | | | - Li Shen
- Institutes for Systems Genetics, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Mohammad Amjad Kamal
- West China School of Nursing/Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
- Enzymoics; Novel Global Community Educational Foundation, Hebersham, NSW, Australia
| | - Bairong Shen
- Institutes for Systems Genetics, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
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Liu SS, Yang L, Kong FD, Zhao JH, Yao L, Yuchi ZG, Ma QY, Xie QY, Zhou LM, Guo MF, Dai HF, Zhao YX, Luo DQ. Three New Quinazoline-Containing Indole Alkaloids From the Marine-Derived Fungus Aspergillus sp. HNMF114. Front Microbiol 2021; 12:680879. [PMID: 34149672 PMCID: PMC8206283 DOI: 10.3389/fmicb.2021.680879] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 04/15/2021] [Indexed: 11/20/2022] Open
Abstract
By feeding tryptophan to the marine-derived fungus Aspergillus sp. HNMF114 from the bivalve mollusk Sanguinolaria chinensis, 3 new quinazoline-containing indole alkaloids, named aspertoryadins H–J (1–3), along with 16 known ones (4–19), were obtained. The structures of the new compounds were elucidated by the analysis of spectroscopic data combined with quantum chemical calculations of nuclear magnetic resonance (NMR) chemical shifts and electron capture detector (ECD) spectra. Structurally, compound 3 represents the first example of this type of compound, bearing an amide group at C-3. Compounds 10 and 16 showed potent α-glucosidase inhibitory activity with IC50 values of 7.18 and 5.29 μM, and compounds 13 and 14 showed a clear activation effect on the ryanodine receptor from Spodoptera frugiperda (sfRyR), which reduced the [Ca2+]ER by 37.1 and 36.2%, respectively.
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Affiliation(s)
- Sha-Sha Liu
- College of Life Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding, China
| | - Li Yang
- Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou, China
| | - Fan-Dong Kong
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning, China
| | - Jia-Hui Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Li Yao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Zhi-Guang Yuchi
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Qing-Yun Ma
- Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou, China
| | - Qing-Yi Xie
- Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou, China
| | - Li-Man Zhou
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning, China
| | - Meng-Fei Guo
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning, China
| | - Hao-Fu Dai
- Hainan Institute for Tropical Agricultural Resources, CATAS, Haikou, China
| | - You-Xing Zhao
- Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou, China
| | - Du-Qiang Luo
- College of Life Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding, China
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Chen JJ, Wang SW, Chiang YR, Pang KL, Kuo YH, Shih TY, Lee TH. Highly Oxygenated Constituents from a Marine Alga-Derived Fungus Aspergillus giganteus NTU967. Mar Drugs 2020; 18:md18060303. [PMID: 32517237 PMCID: PMC7374281 DOI: 10.3390/md18060303] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 05/26/2020] [Accepted: 06/04/2020] [Indexed: 12/24/2022] Open
Abstract
Agar-based disc diffusion antimicrobial assay has shown that the ethyl acetate extract of the fermented broth of Aspergillusgiganteus NTU967 isolated from Ulva lactuca exhibited significant antimicrobial activity in our preliminary screening of bioactive fungal strains. Therefore, column chromatography of the active principles from liquid- and solid–state fermented products of the fungal strain was carried out, and which had led to isolation of eleven compounds. Their structures were determined by spectral analysis to be seven new highly oxygenated polyketides, namely aspergilsmins A–G (1–7), along with previously reported patulin, deoxytryptoquivaline, tryptoquivaline and quinadoline B. Among these, aspergilsmin C (3) and patulin displayed promising anticancer activities against human hepatocellular carcinoma SK-Hep-1 cells and prostate cancer PC-3 cells with IC50 values between 2.7–7.3 μM. Furthermore, aspergilsmin C (3) and patulin exhibited significant anti-angiogenic functions by impeding cell growth and tube formation of human endothelial progenitor cells without any cytotoxicity.
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Affiliation(s)
- Jih-Jung Chen
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang-Ming University, Taipei 11221, Taiwan;
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404, Taiwan
| | - Shih-Wei Wang
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan;
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yin-Ru Chiang
- Biodiversity Research Center, Academia Sinica, Taipei 11529, Taiwan;
| | - Ka-Lai Pang
- Institute of Marine Biology and Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan;
| | - Yueh-Hsiung Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung 40447, Taiwan;
- Department of Biotechnology, Asia University, Taichung 41354, Taiwan
- Chinese Medical Research Center, China Medical University, Taichung 40447, Taiwan
| | - Tsai-Yen Shih
- Institute of Fisheries Science, National Taiwan University, Taipei 10617, Taiwan;
| | - Tzong-Huei Lee
- Institute of Fisheries Science, National Taiwan University, Taipei 10617, Taiwan;
- Correspondence: ; Tel.: +886-2-3366-1828
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11
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Li CJ, Chen PN, Li HJ, Mahmud T, Wu DL, Xu J, Lan WJ. Potential Antidiabetic Fumiquinazoline Alkaloids from the Marine-Derived Fungus Scedosporium apiospermum F41-1. JOURNAL OF NATURAL PRODUCTS 2020; 83:1082-1091. [PMID: 32130008 DOI: 10.1021/acs.jnatprod.9b01096] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Fumiquinazoline alkaloids have attracted much attention from medicinal and natural product chemists due to their interesting structures and biological potential. In this study, three new and 12 known fumiquinazoline alkaloids were isolated and characterized from the marine fungus Scedosporium apiospermum F41-1. The structures of the new compounds and their absolute configurations were determined using NMR spectroscopy, ECD, and OR calculations. The compounds were evaluated for their antidiabetic potential by determining their triglyceride-promoting activity using 3T3-L1 adipocytes. One of the new compounds, scequinadoline J (14), as well as scequinadolines D (9) and E (10), was found to promote triglyceride accumulation in 3T3-L1 cells. Scequinadoline D (9) demonstrated the most potent activity, with an EC50 value of 0.27 ± 0.03 μM. Quantitative polymerase chain reaction experiments suggested that scequinadoline D (9) acts through activation of the PPARγ pathway. It stimulated the mRNA expression of PPARγ, AMPKα, C/EBPα, LXRα, SCD-1, and FABP4. In addition, its triglyceride-promoting efficacy could be blocked by a double dose of the PPARγ antagonist GW9662. These results indicated that scequinadoline D (9) is a potent insulin sensitizer that targets adipocytes and may be useful for the treatment of type 2 diabetes mellitus after further investigation.
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Affiliation(s)
- Chan-Juan Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Pei-Nan Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Hou-Jin Li
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
| | - Taifo Mahmud
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon 97331, United States
| | - Dong-Lan Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Jun Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
| | - Wen-Jian Lan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People's Republic of China
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12
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Zaman KHAU, Hu Z, Wu X, Cao S. Tryptoquivalines W and X, two new compounds from a Hawaiian fungal strain and their biological activities. Tetrahedron Lett 2020; 61:151730. [PMID: 33281236 PMCID: PMC7709959 DOI: 10.1016/j.tetlet.2020.151730] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Two new compounds tryptoquivalines W (1) and X (2) were isolated from a Hawaiian soil fungal strain Aspergillus terreus FS107. The soil sample was collected on the top of Mauna Kea, the tallest mountain in Hawaii. The structures of compounds 1 and 2 were determined on the basis of MS spectroscopic and NMR analysis, and NMR calculation. The absolute configuration (AC) was determined by ECD calculations. Compounds 4 and 5 showed inhibition against NF-κB with IC50 values of 3.45 and 6.76 μM, respectively.
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Affiliation(s)
- KH Ahammad Uz Zaman
- Daniel K. Inouye College of Pharmacy, University of Hawaii at Hilo, 200 West Kawili Street, Hilo, HI 96720, United States
| | - Zhenquan Hu
- Warshel Institute for Computational Biology, The Chinese University of Hong Kong, Shenzhen, People’s Republic of China
- School of Chemistry and Materials Science, University of Science and Technology of China, People’s Republic of China
| | - Xiaohua Wu
- Daniel K. Inouye College of Pharmacy, University of Hawaii at Hilo, 200 West Kawili Street, Hilo, HI 96720, United States
| | - Shugeng Cao
- Daniel K. Inouye College of Pharmacy, University of Hawaii at Hilo, 200 West Kawili Street, Hilo, HI 96720, United States
- Cancer Biology Program, University of Hawaii Cancer Center, 701 Ilalo Street, Honolulu, HI 96813, United States
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13
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Kong FD, Zhang SL, Zhou SQ, Ma QY, Xie QY, Chen JP, Li JH, Zhou LM, Yuan JZ, Hu Z, Dai HF, Huang XL, Zhao YX. Quinazoline-Containing Indole Alkaloids from the Marine-Derived Fungus Aspergillus sp. HNMF114. JOURNAL OF NATURAL PRODUCTS 2019; 82:3456-3463. [PMID: 31823605 DOI: 10.1021/acs.jnatprod.9b00845] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Seven new quinazoline-containing indole alkaloids (1-7) named aspertoryadins A-G, along with nine known ones (8-16), were isolated from the marine-derived fungus Aspergillus sp. HNMF114 from the bivalve mollusk Sanguinolaria chinensis. The structures of the new compounds were elucidated from spectroscopic data, X-ray diffraction analysis, ECD spectra analysis, and ECD calculations. Compound 1 bears an aminosulfonyl group in the structure, which is rarely encountered in natural products. Compounds 6, 7, and 13 exhibited quorum sensing inhibitory activity against Chromobacterium violaceum CV026 with MIC values of 32, 32, and 16 μg/well, respectively.
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Affiliation(s)
- Fan-Dong Kong
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
| | - Sheng-Liang Zhang
- Key Laboratory of Tropical Biological Resources of the Ministry of Education , Hainan University , Haikou 570228 , People's Republic of China
| | - Shuang-Qing Zhou
- Key Laboratory of Tropical Biological Resources of the Ministry of Education , Hainan University , Haikou 570228 , People's Republic of China
| | - Qing-Yun Ma
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
| | - Qing-Yi Xie
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
| | - Jin-Ping Chen
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
| | - Jiu-Hui Li
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
| | - Li-Man Zhou
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
| | - Jing-Zhe Yuan
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
| | - Zhong Hu
- Department of Biology, College of Science , Shantou University , Shantou 515063 , People's Republic of China
| | - Hao-Fu Dai
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
| | - Xiao-Long Huang
- Key Laboratory of Tropical Biological Resources of the Ministry of Education , Hainan University , Haikou 570228 , People's Republic of China
| | - You-Xing Zhao
- Hainan Key Laboratory for Research and Development of Natural Product from Li Folk Medicine , Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences , Haikou 571101 , People's Republic of China
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14
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Resende DISP, Boonpothong P, Sousa E, Kijjoa A, Pinto MMM. Chemistry of the fumiquinazolines and structurally related alkaloids. Nat Prod Rep 2019; 36:7-34. [DOI: 10.1039/c8np00043c] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This review covers the isolation, structure elucidation, biological activities, biosynthetic pathways, and synthetic studies of the 77 fumiquinazolines and structurally related alkaloids described up to 2018.
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Affiliation(s)
- Diana I. S. P. Resende
- Laboratory of Organic and Pharmaceutical Chemistry
- Faculty of Pharmaceutical Sciences
- University of Porto
- 4050-313 Porto
- Portugal
| | - Papichaya Boonpothong
- Laboratory of Organic and Pharmaceutical Chemistry
- Faculty of Pharmaceutical Sciences
- University of Porto
- 4050-313 Porto
- Portugal
| | - Emília Sousa
- Laboratory of Organic and Pharmaceutical Chemistry
- Faculty of Pharmaceutical Sciences
- University of Porto
- 4050-313 Porto
- Portugal
| | - Anake Kijjoa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR)
- Terminal de Cruzeiros do Porto de Leixões
- Matosinhos
- Portugal
- ICBAS-Instituto de Ciências Biomédicas Abel Salazar
| | - Madalena M. M. Pinto
- Laboratory of Organic and Pharmaceutical Chemistry
- Faculty of Pharmaceutical Sciences
- University of Porto
- 4050-313 Porto
- Portugal
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15
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Kobayashi K, Ohte S, Ohshiro T, Ugaki N, Tomoda H. A Mixture of Atropisomers Enhances Neutral Lipid Degradation in Mammalian Cells with Autophagy Induction. Sci Rep 2018; 8:12099. [PMID: 30108268 PMCID: PMC6092391 DOI: 10.1038/s41598-018-30679-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 07/26/2018] [Indexed: 01/22/2023] Open
Abstract
Atropisomers with a biaryl dihydronaphthopyranone structure, dinapinones A1 (DPA1) (M position) and A2 (DPA2) (P position), were isolated from the fungus culture broth of Talaromyces pinophilus FKI-3864 as inhibitors of [14C]neutral lipid ([14C]triacylglycerol (TG) and [14C]cholesteryl ester (CE)) synthesis from [14C]oleic acid in Chinese hamster ovary-K1 (CHO-K1) cells. DPA2 inhibited [14C]TG and [14C]CE synthesis (IC50s, 0.65 and 5.6 μM, respectively), but DPA1 had no inhibitory activity on [14C]TG and [14C]CE synthesis even at 12 μM. However, a 1:1 mixture of DPA1 and DPA2 (DPAmix) had the most potent inhibitory activity on [14C]TG and [14C]CE synthesis (IC50s, 0.054 and 0.18 μM, respectively). The mechanism of action of DPAmix was investigated. DPAmix had no effects on the enzymes involved in neutral lipid synthesis, while DPAmix enhanced the degradation of [14C]neutral lipids with concomitant decrease in cytosolic lipid droplets accumulated in CHO-K1 cells. From analysis of autophagy marker proteins, DPAmix caused dose-dependent induction of microtubule-associated protein light chain 3-II (LC3-II) and degradation of p62. In the autophagic flux assay using bafilomycin A1, DPAmix upregulated autophagosome turnover. These results reveal that DPAmix enhances neutral lipid degradation together with induction of autophagy.
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Affiliation(s)
- Keisuke Kobayashi
- Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Satoshi Ohte
- Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Taichi Ohshiro
- Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Narihiro Ugaki
- Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Hiroshi Tomoda
- Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
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16
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Wu DL, Li HJ, Smith DR, Jaratsittisin J, Xia-Ke-Er XFKT, Ma WZ, Guo YW, Dong J, Shen J, Yang DP, Lan WJ. Polyketides and Alkaloids from the Marine-Derived Fungus Dichotomomyces cejpii F31-1 and the Antiviral Activity of Scequinadoline A against Dengue Virus. Mar Drugs 2018; 16:md16070229. [PMID: 29986460 PMCID: PMC6071211 DOI: 10.3390/md16070229] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 06/27/2018] [Accepted: 07/03/2018] [Indexed: 12/30/2022] Open
Abstract
In our continuous chemical investigation on the marine-derived fungus Dichotomomyces cejpii F31-1, two new polyketides dichocetides B-C (1, 2), two new alkaloids dichotomocejs E-F (3, 4), and three known fumiquinozalines: scequinadoline A (5), quinadoline A (6), and scequinadoline E (7) were discovered from the culture broth and the mycelium in the culture medium, by the addition of l-tryptophan and l-phenylalanine. Their chemical structures were established by one dimensional (1D), two dimensional (2D) nuclear magnetic resonance (NMR) and high resolution mass spectrometry (HR-MS) data. Among them, scequinadoline A (5) exhibited significant inhibitory activity against dengue virus serotype 2 production by standard plaque assay, equivalent to the positive control andrographlide. Scequinadoline A (5) possesses the potential for further development as a dengue virus inhibitor.
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Affiliation(s)
- Dong-Lan Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Hou-Jin Li
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China.
| | - Duncan R Smith
- Institute of Molecular Bioscience, Mahidol University, Bangkok 10700, Thailand.
| | | | | | - Wen-Zhe Ma
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Avenida Wai Long, Taipa 519020, Macau, China.
| | - Yong-Wei Guo
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Jun Dong
- School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China.
| | - Juan Shen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - De-Po Yang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Wen-Jian Lan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
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17
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Huang LH, Xu MY, Li HJ, Li JQ, Chen YX, Ma WZ, Li YP, Xu J, Yang DP, Lan WJ. Amino Acid-Directed Strategy for Inducing the Marine-Derived Fungus Scedosporium apiospermum F41-1 to Maximize Alkaloid Diversity. Org Lett 2017; 19:4888-4891. [PMID: 28837349 DOI: 10.1021/acs.orglett.7b02238] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
By feeding various amino acids to the marine fungus Scedosporium apiospermum F41-1, 22 diverse alkaloids, including 14 new compounds, were obtained. Scedapins A-E (1-5) possess a rare skeleton of a pyrazinoquinazolinedione and an imidazoindolone/indolone linked by a tetrahydrofuran ring. Scedapin C (3) is the first example of fumiquinazoline that contains an aminosulfonyl group. Their structures were determined by HRMS, NMR, ECD calculations and X-ray single-crystal diffraction analysis. The biosynthetic pathways of fumiquinazolines 1-18 were proposed. Scedapin C (3) and scequinadoline D (8) displayed significant antiviral activity against hepatitis C.
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Affiliation(s)
- Li-Hong Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, China.,Guangdong Technology Research Center for Advanced Chinese Medicine , Guangzhou 510006, China
| | - Meng-Yang Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, China
| | - Hou-Jin Li
- School of Chemistry, Sun Yat-sen University , Guangzhou 510275, China
| | - Jin-Qian Li
- Institute of Human Virology and Zhongshan School of Medicine, Sun Yat-sen University , Guangzhou 510080, China
| | - Yan-Xiu Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, China.,Guangdong Technology Research Center for Advanced Chinese Medicine , Guangzhou 510006, China
| | - Wen-Zhe Ma
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology , Avenida Wai Long, Taipa 519020, Macau (SAR), China
| | - Yi-Ping Li
- Institute of Human Virology and Zhongshan School of Medicine, Sun Yat-sen University , Guangzhou 510080, China
| | - Jun Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, China
| | - De-Po Yang
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, China.,Guangdong Technology Research Center for Advanced Chinese Medicine , Guangzhou 510006, China
| | - Wen-Jian Lan
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, China.,Guangdong Technology Research Center for Advanced Chinese Medicine , Guangzhou 510006, China
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18
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Sun Z, Tian S, Li S, Liu Y, Zhang Y, Li Y. Facile synthesis of thiochromanyl-spirooxindoles via K 2 CO 3 catalyzed tandem sulfa-Michael/Aldol reaction. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.07.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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19
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Modugu NR, Pittala PK. Polyethylene glycol (PEG-400) promoted as an efficient and recyclable reaction medium for the one-pot eco-friendly synthesis of functionalized isoxazole substituted spirooxindole derivatives. NEW J CHEM 2017. [DOI: 10.1039/c7nj03515b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient, inexpensive and environmentally friendly synthesis of novel isoxazole substituted spirooxindole-pyridopyrimidine/indenopyridine/chromenopyridine/naphthyridine/quinoline derivatives has been developed.
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Affiliation(s)
- Nagi Reddy Modugu
- Division of Natural Products Chemistry (CSIR)
- Indian Institute of Chemical Technology
- Hyderabad
- India
| | - Praveen Kumar Pittala
- Division of Natural Products Chemistry (CSIR)
- Indian Institute of Chemical Technology
- Hyderabad
- India
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20
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Rajachan OA, Kanokmedhakul K, Sanmanoch W, Boonlue S, Hannongbua S, Saparpakorn P, Kanokmedhakul S. Chevalone C analogues and globoscinic acid derivatives from the fungus Neosartorya spinosa KKU-1NK1. PHYTOCHEMISTRY 2016; 132:68-75. [PMID: 27680770 DOI: 10.1016/j.phytochem.2016.09.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 09/06/2016] [Accepted: 09/12/2016] [Indexed: 06/06/2023]
Abstract
Four meroterpenoids, 1-hydroxychevalone C, 1-acetoxychevalone C, 1,11-dihydroxychevalone C, and 11-hydroxychevalone C and two ester epimers, 2S,4S-spinosate and 2S,4R-spinosate, together with seven known compounds, chevalones B, C, and E, tryptoquivaline, nortryptoquivaline, tryptoquivaline L, and quinadoline A were isolated from the fungus Neosartorya spinosa. Their structures were established based on spectroscopic data analyses. The theoretical ECD spectra of epimers, 2S,4S-spinosate and 2S,4R-spinosate were calculated to support the experimental results of their CD spectra. 1-hydroxychevalone C exhibited antimycobacterial activity against Mycobacterium tuberculosis with a MIC value of 26.4 μM. 1-Acetoxychevalone C and tryptoquivaline showed antimalarial activity against Plasmodium falciparum with IC50 values of 6.67 and 2.65 μM, respectively. In addition, 1-hydroxychevalone C, 1-acetoxychevalone C, 1,11-dihydroxychevalone C and quinadoline A showed cytotoxicity against KB and NCI-H187 cancer cell lines with IC50 values in the range of 32.7-103.3 μM.
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Affiliation(s)
- Oue-Artorn Rajachan
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Kwanjai Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
| | - Wareerat Sanmanoch
- Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sophon Boonlue
- Department of Microbiology, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Supa Hannongbua
- Department of Chemistry, Faculty of Science, Kasetsart University, Chatuchak, Bangkok, 10900, Thailand
| | - Patchreenart Saparpakorn
- Department of Chemistry, Faculty of Science, Kasetsart University, Chatuchak, Bangkok, 10900, Thailand
| | - Somdej Kanokmedhakul
- Natural Products Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
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21
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Hexafluoroisopropyl alcohol mediated synthesis of 2,3-dihydro-4H-pyrido[1,2-a]pyrimidin-4-ones. Sci Rep 2016; 6:36316. [PMID: 27805054 PMCID: PMC5090868 DOI: 10.1038/srep36316] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 10/13/2016] [Indexed: 02/08/2023] Open
Abstract
An efficient synthesis of novel 2,3-dihydro-4H-pyrido[1,2-a]pyrimidin-4-ones has been reported. Inexpensive and readily available substrates, environmentally benign reaction condition, and product formation up to quantitative yield are the key features of this methodology. Products are formed by the aza-Michael addition followed by intramolecular acyl substitution in a domino process. The polar nature and strong hydrogen bond donor capability of 1,1,1,3,3,3-hexafluoropropan-2-ol is pivotal in this cascade protocol.
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22
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Yu G, Zhou G, Zhu M, Wang W, Zhu T, Gu Q, Li D. Neosartoryadins A and B, Fumiquinazoline Alkaloids from a Mangrove-Derived Fungus Neosartorya udagawae HDN13-313. Org Lett 2015; 18:244-7. [PMID: 26713369 DOI: 10.1021/acs.orglett.5b02964] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Neosartoryadins A (1) and B (2), both with a unique 6/6/6/5 quinazoline ring system connected directly to a 6/5/5 imidazoindolone ring, together with three biogenetically related compounds 3-5, were isolated from the endophytic fungus Neosartorya udagawae HDN13-313. The absolute configurations of new compounds 1-4 were established. Compounds 1 and 2 displayed anti-influenza virus A (H1N1) activities with IC50 values of 66 and 58 μM, respectively (ribavirin as positive control, IC50 = 94 μM).
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Affiliation(s)
- Guihong Yu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of China
| | - Guoliang Zhou
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of China
| | - Meilin Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of China
| | - Wei Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of China
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of China
| | - Qianqun Gu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of China
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23
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Liu Y, Xue J, Sun Z, Liu D, Xing Y, Li Y. Substituent-Controlled Selective Synthesis of Spirooxindoles and Oxazolyloxindoles via Two Tandem Reactions. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500290] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yun Liu
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; 222 Tianshui South Rd. Lanzhou 730000, Gansu P. R. China
| | - Jijun Xue
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; 222 Tianshui South Rd. Lanzhou 730000, Gansu P. R. China
| | - Zhou Sun
- College of Chemical Science and Engineering; Qingdao University; 308 Ningxia Rd. Qingdao 266000, Shandong P. R. China
| | - Dongxue Liu
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; 222 Tianshui South Rd. Lanzhou 730000, Gansu P. R. China
| | - Yacheng Xing
- College of Chemical Science and Engineering; Qingdao University; 308 Ningxia Rd. Qingdao 266000, Shandong P. R. China
| | - Ying Li
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; 222 Tianshui South Rd. Lanzhou 730000, Gansu P. R. China
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Abstract
This review covers the literature published in 2013 for marine natural products (MNPs), with 982 citations (644 for the period January to December 2013) 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 (1163 for 2013), together with the relevant biological activities, source organisms and country of origin. Reviews, 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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25
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Filby PS, Rayat S. Mechanistic Investigation on the Formation of 2-Halo-3-aryl-4(3H)-quinazoliniminium Halides from Heteroenyne-allenes: A Computational Study. J Org Chem 2015; 80:4299-305. [PMID: 25867171 DOI: 10.1021/jo502664s] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Intramolecular cyclization of the heteroenyne-allene, 2-((phenylimino)methyleneamino)-benzonitrile (1) in the presence of HCl to produce 2-chloro-3-phenyl-4(3H)-quinazoliniminium chloride (Qz) involves the formation of two new bonds: a C-Cl bond and a C-N bond. We propose five pathways for this reaction. Four of these pathways involve chloride capture to form the C-Cl bond prior to the intramolecular nucleophilic attack to form the C-N bond, while one pathway involves ring closure to form the C-N bond prior to C-Cl bond formation. All calculations were carried out at B3LYP and MP2 levels of theory and employed the 6-311G* basis set. The solvent effects were considered using a Polarized Continuum Model with dichloromethane as the solvent. The calculations at both levels show that the mechanism involves initial protonation of 1, preferentially at Nα to give 2 which rapidly captures the chloride ion to form 5. This intermediate is protonated at the -CN group to form 8ROT, which then tautomerizes to its more stable isomer 9ROT. The latter undergoes intramolecular nucleophilic attack from Nβ to the protonated -CN group to form the cyclized intermediate 12, which tautomerizes to its most stable isomer 13. The coordination of Cl(-) ion present in the solution with 13 gives the final product Qz.
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Affiliation(s)
- Pamela S Filby
- Department of Chemistry, Ball State University, Cooper Physical Science Building, Muncie, Indiana 47304-0445, United States
| | - Sundeep Rayat
- Department of Chemistry, Ball State University, Cooper Physical Science Building, Muncie, Indiana 47304-0445, United States
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26
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Kshirsagar UA. Recent developments in the chemistry of quinazolinone alkaloids. Org Biomol Chem 2015; 13:9336-52. [DOI: 10.1039/c5ob01379h] [Citation(s) in RCA: 191] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This review focuses on the recent advances in the chemistry of quinazolinone alkaloids which covers the newly isolated quinazolinone alkaloids with their biological activities and the recently reported total syntheses of quinazolinone alkaloids from 2006 to 2015.
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Affiliation(s)
- U. A. Kshirsagar
- Department of Chemistry
- Savitribai Phule Pune University (Formerly: University of Pune)
- Pune 411007
- India
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27
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Alawode OE, Naganaboina VK, Liyanage T, Desper J, Rayat S. One-Pot Cascade Approach to Phenanthridine-Fused Quinazoliniminiums from Heteroenyne-Allenes. Org Lett 2014; 16:1494-7. [DOI: 10.1021/ol500314x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Olajide E. Alawode
- Department
of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
| | - Vijaya Kumar Naganaboina
- Department
of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
| | - Thakshila Liyanage
- Department
of Chemistry, Ball State University, Cooper Physical Science Building, Muncie, Indiana 47304-0445, United States
| | - John Desper
- Department
of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
| | - Sundeep Rayat
- Department
of Chemistry, Ball State University, Cooper Physical Science Building, Muncie, Indiana 47304-0445, United States
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28
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Takemoto Y, Tsukano C. Synthetic Approaches to Spiro-oxindoles and Iminoindolines Based on Formation of C2–C3 Bond. HETEROCYCLES 2014. [DOI: 10.3987/rev-14-805] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Wu M, Ma D. Total Syntheses of (±)-Spiroquinazoline, (−)-Alantryphenone, (+)-Lapatin A, and (−)-Quinadoline B. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303893] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Wu M, Ma D. Total Syntheses of (±)-Spiroquinazoline, (−)-Alantryphenone, (+)-Lapatin A, and (−)-Quinadoline B. Angew Chem Int Ed Engl 2013; 52:9759-62. [DOI: 10.1002/anie.201303893] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 06/17/2013] [Indexed: 11/08/2022]
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31
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Peng J, Lin T, Wang W, Xin Z, Zhu T, Gu Q, Li D. Antiviral alkaloids produced by the mangrove-derived fungus Cladosporium sp. PJX-41. JOURNAL OF NATURAL PRODUCTS 2013; 76:1133-40. [PMID: 23758051 DOI: 10.1021/np400200k] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Six new indole alkaloids including five new glyantrypine derivatives (1, 2a, 2b, 3, 4) and a new pyrazinoquinazoline derivative (5), together with eight known alkaloids (6-13), were isolated from the culture of the mangrove-derived fungus Cladosporium sp. PJX-41. Their structures were elucidated primarily by spectroscopic and physical data. The absolute configurations of compounds 1-9 were established on the basis of CD, NOESY data, and single-crystal X-ray diffraction analysis. Compounds 2b, 5, 7-9, and 11 exhibited significant activities against influenza virus A (H1N1), with IC50 values of 82-89 μM.
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Affiliation(s)
- Jixing Peng
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
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32
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Kobayashi K, Ohshiro T, Matsuda D, Jiang W, Hong B, Si S, Tomoda H. The mechanism of action of bufalin in inhibition of lipid droplet accumulation in mouse macrophages. Biol Pharm Bull 2013; 36:364-9. [PMID: 23449325 DOI: 10.1248/bpb.b12-00722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A cardiotonic glycoside, bufalin, originally isolated from the dried white venom of Chinese toad Bufo gargarizans, was found to inhibit lipid droplet accumulation in mouse macrophages. Bufalin selectively inhibited synthesis of [C]cholesteryl ester (CE), a main component of lipid droplet, from [C]oleic acid and [C]cholesterol with IC values of 8.6 µM and 10 µM, respectively. The postlysosomal metabolism of cholesterol to CE in macrophages was also inhibited by the compound with a similar IC value of 13.2 µM. However, the compound exhibited almost no effect on acyl-CoA : cholesterol acyltransferase, a key enzyme in CE synthesis localized in the endoplasmic reticulum (ER). From the fluorescent microscopic observation of cellular lipids, bufalin-treated macrophages increased the accumulation of free cholesterol in lysosomes and caused to enlarge the shape and volume of lysosomes as well as pregnenolone-treated macrophages. These findings suggest that bufalin inhibited the postlysosomal metabolism of cholesterol, leading to a reduction of lipid droplets in mouse macrophages without cytotoxicity.
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Affiliation(s)
- Keisuke Kobayashi
- Graduate School of Pharmaceutical Sciences, Kitasato University, 5–9–1 Shirokane, Minato-ku, Tokyo 108–8641, Japan
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33
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Bucar F, Wube A, Schmid M. Natural product isolation – how to get from biological material to pure compounds. Nat Prod Rep 2013; 30:525-45. [DOI: 10.1039/c3np20106f] [Citation(s) in RCA: 229] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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34
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Doveston RG, Taylor RJ. An expedient synthesis of the proposed biosynthetic precursor of the oxepine natural product, janoxepin. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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35
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Naganaboina VK, Chandra KL, Desper J, Rayat S. An Easy Entry into 2-Halo-3-aryl-4(3H)-quinazoliniminium Halides from Heteroenyne-allenes. Org Lett 2011; 13:3718-21. [DOI: 10.1021/ol201372n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vijaya Kumar Naganaboina
- Department of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
| | - Kusum Lata Chandra
- Department of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
| | - John Desper
- Department of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
| | - Sundeep Rayat
- Department of Chemistry, Kansas State University, 213 CBC Building, Manhattan, Kansas 66506-0401, United States
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36
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37
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Ishikura M, Yamada K, Abe T. Simple indole alkaloids and those with a nonrearranged monoterpenoid unit. Nat Prod Rep 2010; 27:1630-80. [DOI: 10.1039/c005345g] [Citation(s) in RCA: 210] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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38
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Russel JS, Pelkey ET, Yoon-Miller SJ. Chapter 5.2: Five-Membered Ring Systems: Pyrroles and Benzo Analogs. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/s0959-6380(09)70033-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
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