1
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Engle K, Kumar G. Tackling multi-drug resistant fungi by efflux pump inhibitors. Biochem Pharmacol 2024; 226:116400. [PMID: 38945275 DOI: 10.1016/j.bcp.2024.116400] [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: 02/06/2024] [Revised: 06/22/2024] [Accepted: 06/27/2024] [Indexed: 07/02/2024]
Abstract
The emergence of multidrug-resistant fungi is of grave concern, and its infections are responsible for significant deaths among immunocompromised patients. The treatment of fungal infections primarily relies on a clinical class of antibiotics, including azoles, polyenes, echinocandins, polyketides, and a nucleotide analogue. However, the incidence of fungal infections is increasing as the treatment for human and plant fungal infections overlaps with antifungal drugs. The need for new antifungal agents acting on different targets than known targets is undeniable. Also, the pace at which loss of fungal susceptibility to antibiotics cannot be undermined. There are several modes by which fungi can develop resistance to antibiotics, including reduced drug uptake, drug target alteration, and a reduction in the cellular concentration of the drug due to active extrusions and biofilm formation. The efflux pump's overexpression in the fungi primarily reduced the antibiotic's concentration to a sub-lethal concentration, thus responsible for developing resistant fungus strains. Several strategies are used to check antibiotic resistance in multi-drug resistant fungi, including synthesizing antibiotic analogs and giving antibiotics in combination therapies. Among them, the efflux pump protein inhibitors are considered potential adjuvants to antibiotics and can block the efflux of antibiotics by inhibiting efflux pump protein transporters. Moreover, it can sensitize the antifungal drugs to multi-drug resistant fungi with overexpressed efflux pump proteins. This review discusses the natural lead molecules, repurposable drugs, and formulation strategies to overcome the efflux pump activity in the fungi.
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Affiliation(s)
- Kritika Engle
- Department of Natural Products, Chemical Sciences, National Institute of Pharmaceutical Education and Research-Hyderabad, Hyderabad, Balanagar 500037, India
| | - Gautam Kumar
- Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India.
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2
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Zhang W, Ran Q, Li H, Lou H. Endolichenic Fungi: A Promising Medicinal Microbial Resource to Discover Bioactive Natural Molecules-An Update. J Fungi (Basel) 2024; 10:99. [PMID: 38392771 PMCID: PMC10889713 DOI: 10.3390/jof10020099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 02/24/2024] Open
Abstract
Lichens are some of the most unique fungi and are naturally encountered as symbiotic biological organisms that usually consist of fungal partners (mycobionts) and photosynthetic organisms (green algae and cyanobacteria). Due to their distinctive growth environments, including hot deserts, rocky coasts, Arctic tundra, toxic slag piles, etc., they produce a variety of biologically meaningful and structurally novel secondary metabolites to resist external environmental stresses. The endofungi that live in and coevolve with lichens can also generate abundant secondary metabolites with novel structures, diverse skeletons, and intriguing bioactivities due to their mutualistic symbiosis with hosts, and they have been considered as strategically significant medicinal microresources for the discovery of pharmaceutical lead compounds in the medicinal industry. They are also of great importance in the fundamental research field of natural product chemistry. In this work, we conducted a comprehensive review and systematic evaluation of the secondary metabolites of endolichenic fungi regarding their origin, distribution, structural characteristics, and biological activity, as well as recent advances in their medicinal applications, by summarizing research achievements since 2015. Moreover, the current research status and future research trends regarding their chemical components are discussed and predicted. A systematic review covering the fundamental chemical research advances and pharmaceutical potential of the secondary metabolites from endolichenic fungi is urgently required to facilitate our better understanding, and this review could also serve as a critical reference to provide valuable insights for the future research and promotion of natural products from endolichenic fungi.
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Affiliation(s)
- Wenge Zhang
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Qian Ran
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Hehe Li
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Hongxiang Lou
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
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3
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Zhu L, Gan D, Dong SH, He BJ, Li CZ, Wang CY, Cai L, Su JW, Cai L, Ding ZT. Guided isolation of secondary metabolites from Nectria sp. MHHJ-3 by molecular network strategy. Fitoterapia 2023; 171:105668. [PMID: 37683876 DOI: 10.1016/j.fitote.2023.105668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/03/2023] [Accepted: 09/05/2023] [Indexed: 09/10/2023]
Abstract
The fungus Nectria sp. MHHJ-3 was isolated from Illigera rhodantha. A molecular networking-guided the secondary metabolites investigation of Nectria sp. MHHJ-3 led to the isolation of ten metabolites (1-10), including two new naphthalenone derivatives, nectrianaphthalenones A (1) and B (2), and two new steroids, nectriasteroids A (3) and B (4). Their structures were elucidated by extensive spectroscopic analysis including the HRESIMS, 1D/2D NMR and electronic circular dichroism (ECD) spectra. A plausible biosynthetic pathway for 1-2 was proposed. Compounds 1 and 2 exhibited moderate acetylcholinesterase (AChE) inhibitory activities. Compounds 3 and 4 showed significant cytotoxic activity against selected tumor cells. Particularly, compound 3 exhibited the strongest activity against A549 cells with an IC50 value of 13.73 ± 0.03 μM, which was at the same grade with that of positive control cisplatin.
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Affiliation(s)
- Li Zhu
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Dong Gan
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Shu-Hui Dong
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Bi-Jian He
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Chen-Zhe Li
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Cheng-Yao Wang
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Lan Cai
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Jin-Wei Su
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Le Cai
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Zhong-Tao Ding
- Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China; Yunnan University of Chinese Medicine, Kunming 650091, People's Republic of China.
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4
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Liu Y, Brown MK. Photosensitized [2 + 2]-Cycloadditions of Dioxaborole: Reactivity Enabled by Boron Ring Constraint Strategy. J Am Chem Soc 2023; 145:25061-25067. [PMID: 37939224 PMCID: PMC11041673 DOI: 10.1021/jacs.3c08105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
A strategy to achieve photosensitized [2 + 2] cycloadditions by means of temporary ring constraint is reported. Specifically, a dioxaborole is prepared that undergoes [2 + 2] cycloadditions with a wide variety of alkenes. This strategy overcomes some challenges with the cycloaddition of acyclic substrates. The products can be easily transformed into cyclobutyl diols or 1,4-dicarbonyl compounds; the latter represents a formal alkene vicinal diacylation. The synthetic utility of this method is shown in the synthesis of valuable heterocycles and biatriosporin D.
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Affiliation(s)
- Yanyao Liu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
| | - M Kevin Brown
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
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5
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Lei X, Feng J, Guo Q, Li Y, Shi J. Synthesis of Polysubstituted Furans via Rh(II)-Catalyzed [2 + 3] Annulation of N-Sulfonyl-1,2,3-triazoles with Enaminones. Org Lett 2023; 25:7338-7343. [PMID: 37767967 DOI: 10.1021/acs.orglett.3c02771] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
An unprecedented [2 + 3] annulation of N-sulfonyl-1,2,3-triazoles with enaminones is reported for the access of polysubstituted furans. The key to the success of the transformations lies in the use of Rh(II)-Brønsted acid as cooperative catalysts. Unlike the conventional annulations of N-sulfony-l-1,2,3-triazoles, the Rh(II)-azavinyl carbenes species play dual functions in this work, enabled by the cleavage of the C(sp2)-N bond. The mechanism studies suggested that an intermolecular rearrangement of the TsNH- group is crucial to the annulation process.
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Affiliation(s)
- Xiaoqiang Lei
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Juan Feng
- School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
| | - Qinglan Guo
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Yuanhe Li
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), College of Chemistry and the Peking University, Beijing 100871, China
| | - Jiangong Shi
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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6
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Saisin S, Panthong K, Hongthong S, Kuhakarn C, Thanasansurapong S, Chairoungdua A, Suksen K, Akkarawongsapat R, Napaswad C, Prabpai S, Nuntasaen N, Reutrakul V. Pyranonaphthoquinones and Naphthoquinones from the Stem Bark of Ventilago harmandiana and Their Anti-HIV-1 Activity. JOURNAL OF NATURAL PRODUCTS 2023; 86:498-507. [PMID: 36787536 PMCID: PMC10043937 DOI: 10.1021/acs.jnatprod.2c00980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Indexed: 06/18/2023]
Abstract
Seven previously undescribed compounds, including five pyranonaphthoquinones (ventilanones L-P) and two naphthoquinones (ventilanones Q and R), along with 15 known compounds were isolated from the stem bark of Ventilago harmandiana (Rhamnaceae). The structures were established by extensive analysis of their spectroscopic data. The absolute configuration of ventilanone L was established from single crystal X-ray crystallographic analysis using Cu Kα radiation and from its electronic circular dichroism data. Anti-HIV-1 activity using a syncytium inhibition assay and the cytotoxic activities of some isolated compounds were evaluated. Compounds 12, 13, 15, and 16 showed activity against syncytium formation with half maximal effective concentration (EC50) values ranging from 9.9 to 47 μM (selectivity index (SI) 2.4-4.5).
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Affiliation(s)
- Suwannee Saisin
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry
(PERCH-CIC), Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
| | - Kanda Panthong
- Division
of Physical Sciences and Center of Excellence for Innovation in Chemistry
(PERCH-CIC), Faculty of Science, Prince
of Songkla University, Songkhla 90112, Thailand
| | - Sakchai Hongthong
- Division
of Chemistry, Faculty of Science and Technology, Rajabhat Rajanagarindra University, Chachoengsao 24000, Thailand
| | - Chutima Kuhakarn
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry
(PERCH-CIC), Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
| | - Sariyarach Thanasansurapong
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry
(PERCH-CIC), Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
| | - Arthit Chairoungdua
- Department
of Physiology, Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
| | - Kanoknetr Suksen
- Department
of Physiology, Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
| | - Radeekorn Akkarawongsapat
- Department
of Microbiology, Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
| | - Chanita Napaswad
- Department
of Microbiology, Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
| | - Samran Prabpai
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry
(PERCH-CIC), Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
| | - Narong Nuntasaen
- The Forest
Herbarium National Park, Wildlife and Plant Conservation Department, Ministry of Natural Resources and Environment, Bangkok 10900, Thailand
| | - Vichai Reutrakul
- Department
of Chemistry and Center of Excellence for Innovation in Chemistry
(PERCH-CIC), Faculty of Science, Mahidol
University, Rama VI Road, Bangkok 10400, Thailand
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7
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Manna T, De A, Nurjamal K, Husain SM. Asymmetric synthesis of (+)-teratosphaerone B, its non-natural analogue and (+)-xylarenone using an ene- and naphthol reductase cascade. Org Biomol Chem 2022; 20:7410-7414. [PMID: 36093846 DOI: 10.1039/d2ob01262f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a one-pot bienzymatic cascade containing an ene and a naphthol reductase is developed. It is applied for the synthesis of (+)-(3R,4R)-teratosphaerone B, its non-natural regioisomer in both cis- and trans-forms and (+)-xylarenone by the reduction of chemically synthesized naphthoquinone precursors in high yields (76-92%) and excellent ee (>99%). This work implies similar biosynthetic steps in the formation of the synthesized natural products.
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Affiliation(s)
- Tanaya Manna
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Arijit De
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Khondekar Nurjamal
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Syed Masood Husain
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
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8
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Fungal Naphthalenones; Promising Metabolites for Drug Discovery: Structures, Biosynthesis, Sources, and Pharmacological Potential. Toxins (Basel) 2022; 14:toxins14020154. [PMID: 35202181 PMCID: PMC8879409 DOI: 10.3390/toxins14020154] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 12/10/2022] Open
Abstract
Fungi are well-known for their abundant supply of metabolites with unrivaled structure and promising bioactivities. Naphthalenones are among these fungal metabolites, that are biosynthesized through the 1,8-dihydroxy-naphthalene polyketide pathway. They revealed a wide spectrum of bioactivities, including phytotoxic, neuro-protective, cytotoxic, antiviral, nematocidal, antimycobacterial, antimalarial, antimicrobial, and anti-inflammatory. The current review emphasizes the reported naphthalenone derivatives produced by various fungal species, including their sources, structures, biosynthesis, and bioactivities in the period from 1972 to 2021. Overall, more than 167 references with 159 metabolites are listed.
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9
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Daniela SV, Gabriela OM, Andrea PM. A state-of-the-art review and prospective therapeutic applications of prenyl flavonoids as chemosensitizers against antifungal multidrug resistance in Candida albicans. Curr Med Chem 2022; 29:4251-4281. [PMID: 35139777 DOI: 10.2174/0929867329666220209103538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/01/2021] [Accepted: 12/17/2021] [Indexed: 11/22/2022]
Abstract
Multidrug resistance (MDR) in the opportunistic pathogen Candida albicans is defined as non-susceptibility to at least one agent in two or more drug classes. This phenomenon has been increasingly reported since the rise in the incidence of fungal infections in immunocompromised patients at the end of the last century. After the discovery of efflux pump overexpression as a principal mechanism causing MDR in Candida strains, drug discovery targeting fungal efflux transporters has had a growing impact. Chemosensitization aims to enhance azole intracellular concentrations through combination therapy with transporter inhibitors. Consequently, the use of drug efflux inhibitors combined with the antifungal agent will sensitize the pathogen. As a result, the use of lower drug concentrations will reduce possible adverse effects on the host. Through an extensive revision of the literature, this review aims to provide an exhaustive and critical analysis of the studies carried out in the past two decades, regarding the chemosensitization strategy to cope with multidrug resistance in C. albicans. This work provides a deep analysis of the research about the inhibition of drug-efflux membrane transporters by prenylated flavonoids and the interactions of these phytocompounds with azole antifungals as an approach to chemosensitize multidrug-resistant C. albicans strains. We highlight the importance of prenylflavonoids and their particular chemical and pharmacological characteristics that make them excellent candidates with therapeutic potential as chemosensitizers. Finally, we propose the need for further research of prenyl flavonoids as inhibitors of drug-efflux mediated fungal resistance.
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Affiliation(s)
- Santi V Daniela
- Farmacognosia, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Haya de la torre y Medina Allende, Edificio Ciencias II, X5000HUA Córdoba, Argentina
- Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET), Ciudad Universitaria. X5000HUA Córdoba, Argentina
| | - Ortega María Gabriela
- Farmacognosia, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Haya de la torre y Medina Allende, Edificio Ciencias II, X5000HUA Córdoba, Argentina
- Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET), Ciudad Universitaria. X5000HUA Córdoba, Argentina
| | - Peralta Mariana Andrea
- Farmacognosia, Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Haya de la torre y Medina Allende, Edificio Ciencias II, X5000HUA Córdoba, Argentina
- Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET), Ciudad Universitaria. X5000HUA Córdoba, Argentina
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10
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Song J, Xie F, Luan X, Xu K, Qian L, Lu J, Chang W, Wang X, Lou H. Perylenequinone derivatives from the endolichenic fungus Phialocephala fortinii. Nat Prod Res 2022; 37:1527-1535. [PMID: 35007177 DOI: 10.1080/14786419.2021.2025366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Five undescribed perylenequinone derivatives (PQDs) phialocephalarins H - L (1 - 5), together with two known PQDs phialocephalarins A - B (6, 7) and one known spirobisnaphthalene palmarumycin P3 (8) were isolated from the endolichenic fungus Phialocephala fortinii. Their structures were elucidated on the basis of NMR and HRESIMS data as well as electronic circular dichroism (ECD) calculations. Compounds 1, 2, 4, and 6 - 8 were evaluated for cytotoxic activities against NCI-H460, NCI-H446, PC3, and EC109 cell lines. The results showed that compounds 1, 2, 6, and 8 showed cytotoxic activities against EC109 cells with IC50 values ranging from 24.5 to 33.3 μM.
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Affiliation(s)
- Jintong Song
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China
| | - Fei Xie
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China.,Department of Pharmacy, Qilu Hospital of Shandong University, Jinan, P.R. China
| | - Xiaoyi Luan
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China
| | - Ke Xu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China.,The Second Hospital of Shandong University, Jinan, P.R. China
| | - Lilin Qian
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China
| | - Jinghui Lu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China
| | - Wenqiang Chang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China
| | - Xiaoning Wang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China
| | - Hongxiang Lou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, P.R. China
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11
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Xu K, Li R, Zhu R, Li X, Xu Y, He Q, Xie F, Qiao Y, Luan X, Lou H. Xylarins A-D, Two Pairs of Diastereoisomeric Isoindoline Alkaloids from the Endolichenic Fungus Xylaria sp. Org Lett 2021; 23:7751-7754. [PMID: 34605655 DOI: 10.1021/acs.orglett.1c02730] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two pairs of diastereoisomeric isoindoline alkaloids, xylarins A-D (1-4), were isolated from the endolichenic fungus Xylaria sp. Xylarins A and B (1 and 2) possess a previously undescribed 5/6/5-5/6 polycyclic scaffold, featuring a combination of a novel dihydrobenzofurone unit and an isoindoline unit, while xylarins C and D (3 and 4) contain an additional N,N-dimethylaniline at the C-3' position. Their structures were elucidated by comprehensive spectroscopic analyses combined with single-crystal X-ray diffraction and electronic circular dichroism calculations. The plausible biosynthetic pathways and gene clusters for 1-4 were proposed. Compound 1 exhibited significant antithrombotic activity.
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Affiliation(s)
- Ke Xu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China.,Department of Clinical Pharmacy, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, People's Republic of China
| | - Ruijuan Li
- Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, People's Republic of China
| | - Rongxiu Zhu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Xiaobin Li
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250103, People's Republic of China
| | - Yuliang Xu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Qiaobian He
- Department of Natural Product Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Fei Xie
- Department of Natural Product Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Yanan Qiao
- Department of Natural Product Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Xiaoyi Luan
- Department of Natural Product Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Hongxiang Lou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
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12
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Sun FJ, Li M, Gu L, Wang ML, Yang MH. Recent progress on anti-Candida natural products. Chin J Nat Med 2021; 19:561-579. [PMID: 34419257 DOI: 10.1016/s1875-5364(21)60057-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Indexed: 12/18/2022]
Abstract
Candida is an intractable life-threatening pathogen. Candida infection is extremely difficult to eradicate, and thus is the major cause of morbidity and mortality in immunocompromised individuals. Morevover, the rapid spread of drug-resistant fungi has led to significant decreases in the therapeutic effects of clinical drugs. New anti-Candida agents are urgently needed to solve the complicated medical problem. Natural products with intricate structures have attracted great attention of researchers who make every endeavor to discover leading compounds for antifungal agents. Their novel mechanisms and diverse modes of action expand the variety of fungistatic agents and reduce the emergence of drug resistance. In recent decades, considerable effort has been devoted to finding unique antifungal agents from nature and revealing their unusual mechanisms, which results in important progress on the development of new antifungals, such as the novel cell wall inhibitors YW3548 and SCY-078 which are being tested in clinical trials. This review will present a brief summary on the landscape of anti-Candida natural products within the last decade. We will also discuss in-depth the research progress on diverse natural fungistatic agents along with their novel mechanisms.
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Affiliation(s)
- Fu-Juan Sun
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Min Li
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Liang Gu
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Ming-Ling Wang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Ming-Hua Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China.
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13
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Wethalawe AN, Alwis YV, Udukala DN, Paranagama PA. Antimicrobial Compounds Isolated from Endolichenic Fungi: A Review. Molecules 2021; 26:molecules26133901. [PMID: 34202392 PMCID: PMC8271976 DOI: 10.3390/molecules26133901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/02/2021] [Accepted: 06/05/2021] [Indexed: 12/25/2022] Open
Abstract
A lichen is a symbiotic relationship between a fungus and a photosynthetic organism, which is algae or cyanobacteria. Endolichenic fungi are a group of microfungi that resides asymptomatically within the thalli of lichens. Endolichenic fungi can be recognized as luxuriant metabolic artists that produce propitious bioactive secondary metabolites. More than any other time, there is a worldwide search for new antibiotics due to the alarming increase in microbial resistance against the currently available therapeutics. Even though a few antimicrobial compounds have been isolated from endolichenic fungi, most of them have moderate activities, implying the need for further structural optimizations. Recognizing this timely need and the significance of endolichenic fungi as a promising source of antimicrobial compounds, the activity, sources and the structures of 31 antibacterial compounds, 58 antifungal compounds, two antiviral compounds and one antiplasmodial (antimalarial) compound are summarized in this review. In addition, an overview of the common scaffolds and structural features leading to the corresponding antimicrobial properties is provided as an aid for future studies. The current challenges and major drawbacks of research related to endolichenic fungi and the remedies for them have been suggested.
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Affiliation(s)
- A. Nethma Wethalawe
- Institute of Chemistry Ceylon, College of Chemical Sciences, Rajagiriya 10100, Sri Lanka; (A.N.W.); (Y.V.A.); (D.N.U.)
| | - Y. Vindula Alwis
- Institute of Chemistry Ceylon, College of Chemical Sciences, Rajagiriya 10100, Sri Lanka; (A.N.W.); (Y.V.A.); (D.N.U.)
| | - Dinusha N. Udukala
- Institute of Chemistry Ceylon, College of Chemical Sciences, Rajagiriya 10100, Sri Lanka; (A.N.W.); (Y.V.A.); (D.N.U.)
| | - Priyani A. Paranagama
- Department of Chemistry, University of Kelaniya, Kelaniya 11600, Sri Lanka
- Correspondence:
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14
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New naphthyl derivatives from Aspergillus californicus. J Antibiot (Tokyo) 2020; 74:111-114. [PMID: 32999431 DOI: 10.1038/s41429-020-00372-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/20/2020] [Accepted: 08/21/2020] [Indexed: 11/08/2022]
Abstract
Two new naphthyl-products calinaphthyltriol A (1) and calinaphthalenone A (2) were isolated from Aspergillus californicus IBT 16748 together with one known compound ophiobolin X (3). Their structures were elucidated by extensive spectroscopic analyses. The absolute configuration of 2 was solved by comparing its optical rotation with data for the known compounds 4, 5, and 6 as well as theoretical calculations. The antibacterial and cytotoxic activities of 1 and 3 were evaluated. Both compounds did not show antibacterial activity (MIC > 96 µg·ml-1) against a few selected clinically relevant Gram positive and Gram negative bacterial strains. However, they showed moderate cytotoxicity against HL-60 cell line with IC50 values of 18 and 24 µg·ml-1, respectively.
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15
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Xie F, Luan XY, Gao Y, Xu K, Lou HX. Cytotoxic Heptaketides from the Endolichenic Fungus Ulospora bilgramii. JOURNAL OF NATURAL PRODUCTS 2020; 83:1623-1633. [PMID: 32394716 DOI: 10.1021/acs.jnatprod.0c00108] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Eleven new metabolites including nine heptaketides, ulosporin A-G (1a-7b), one diphenyl compound, ulophenol (8), and one spirobisnaphthalene, palmarumycin P5 (9), were isolated from the endolichenic fungus Ulospora bilgramii, which inhabits the lichen Umbilicaria sp. The structures of these compounds were elucidated based on comprehensive analysis of their spectroscopic, electronic circular dichroism (ECD), and single-crystal X-ray diffraction data. Ulosporin G (7) inhibited the growth of the human cancer cell lines A549, MCF-7, and KB with IC50 values of 1.3, 1.3, and 3.0 μM, respectively. Additionally, it induced A549 cell apoptosis through G0/G1 cell cycle arrest caused by DNA damage.
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Affiliation(s)
- Fei Xie
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
- Department of Pharmacy, Qilu Hospital of Shandong University, Jinan250012, People's Republic of China
| | - Xiao-Yi Luan
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Yun Gao
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Ke Xu
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
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16
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Luan XY, Xie F, Xu K, Gao Y, Lu JH, Lou HX. (±)-Ulodione A, a pair of unprecedented cyclopentanones from Ulospora bilgramii. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Xu X, Shao M, Yin C, Mao Z, Shi J, Yu X, Wang Y, Sun F, Zhang Y. Diversity, Bacterial Symbionts, and Antimicrobial Potential of Termite-Associated Fungi. Front Microbiol 2020; 11:300. [PMID: 32231643 PMCID: PMC7082625 DOI: 10.3389/fmicb.2020.00300] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/10/2020] [Indexed: 11/13/2022] Open
Abstract
The phylogenetic diversity of fungi isolated from the Odontotermes formosanus was investigated by dilution-plate method, combined with morphological characteristics and 5.8S rDNA sequencing. Thirty-nine fungi were isolated and purified from O. formosanus, which were belonging to two phyla and four classes (Sordariomycetes, Dothideomycetes, Eurotiomycetes, Agaricomycetes). Furthermore, nine bacterial 16S rRNA sequences were obtained from total fungal genomic DNA. All bacterial symbionts were segmented into four genera: Bacillus, Methylobacterium, Paenibacillus, and Trabulsiella. The antimicrobial activities of all endophytic fungi extracts were tested by using the filter paper method against Escherichia coli (ATCC 8739), Bacillus subtilis (ATCC 6633), Staphylococcus aureus (ATCC 6538), and Canidia albicans (ATCC 10231). The results exhibited that 25 extracts (64%) exhibited antibacterial activity against at least one of the tested bacterial strains. Furthermore, the secondary metabolites 1 [5-hydroxyramulosin (1a):biatriosporin M (1b) = 2:1] from the Pleosporales sp. BYCDW4 exhibited potent antimicrobial activities against E. coli, C. albicans, B. subtilis, and S. aureus with the inhibition zone diameter (IZD) of 13.67, 14.33, 12.17, and 11.33 mm, respectively, which were comparable with those of the positive control. 1-(2,5-Dihydroxyphenyl)-3-hydroxybutan-1-one (2) from the Microdiplodia sp. BYCDW8 showed medium inhibitory activities against B. subtilis and S. aureus, with the IZD range of 8.32–9.13 mm. In conclusion, the study showed the diversity of insect symbionts could be expected to develop the resource of new species and antibiotics.
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Affiliation(s)
- Xiao Xu
- School of Life Sciences, Anhui Agricultural University, Hefei, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Mingwei Shao
- School of Life Sciences, Anhui Agricultural University, Hefei, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Caiping Yin
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Zhenchuan Mao
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jingjing Shi
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Xinyuan Yu
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Ying Wang
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Feifei Sun
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
| | - Yinglao Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, China
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18
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Xu K, Li G, Zhu R, Xie F, Li Y, Yang W, Xu L, Shen T, Zhao Z, Lou H. Polyketides from the endolichenic fungus Eupenicillium javanicum and their anti-inflammatory activities. PHYTOCHEMISTRY 2020; 170:112191. [PMID: 31731236 DOI: 10.1016/j.phytochem.2019.112191] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/24/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
Seven undescribed polyketides javanicols A-E, 5-epi-citreoviridin and 5-epi-isocitreoviridin, together with five known compounds, were isolated from the endolichenic fungus Eupenicillium javanicum. The structures of these polyketides were determined by means of extensive spectroscopic analyses, electronic circular dichroism (ECD) calculations and gauge-independent atomic orbital (GIAO) NMR shift calculations. These compounds were evaluated for potential anti-inflammatory activity against LPS-activated RAW 264.7 cells. Javanicol E and (+)-terrein displayed moderate inhibitory effects on NO production, with IC50 values of 17.00 and 13.46 μM, respectively.
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Affiliation(s)
- Ke Xu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Gang Li
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao 266021, People's Republic of China
| | - Rongxiu Zhu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Fei Xie
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Yuelan Li
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Wenjing Yang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Lintao Xu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Tao Shen
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Zuntian Zhao
- College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan 250014, People's Republic of China
| | - Hongxiang Lou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China.
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19
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Yang HX, Peng XP, Gao H, Zhang HM, Wang ZR, Li G, Lou HX. Pleosporalins H and I, two new heptaketides from the endophytic fungus Pleosporales sp. F46 by using OSMAC strategy. Nat Prod Res 2019; 35:3307-3313. [DOI: 10.1080/14786419.2019.1698573] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Hong-Xia Yang
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Xiao-Ping Peng
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Han Gao
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Hui-Min Zhang
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Zi-Ru Wang
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Gang Li
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Hong-Xiang Lou
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, People’s Republic of China
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20
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Liu Y, Ruan Q, Jiang S, Qu Y, Chen J, Zhao M, Yang B, Liu Y, Zhao Z, Cui H. Cytochalasins and polyketides from the fungus Diaporthe sp. GZU-1021 and their anti-inflammatory activity. Fitoterapia 2019; 137:104187. [DOI: 10.1016/j.fitote.2019.104187] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/27/2019] [Accepted: 05/27/2019] [Indexed: 12/22/2022]
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21
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Liao HX, Zheng CJ, Huang GL, Mei RQ, Nong XH, Shao TM, Chen GY, Wang CY. Bioactive Polyketide Derivatives from the Mangrove-Derived Fungus Daldinia eschscholtzii HJ004. JOURNAL OF NATURAL PRODUCTS 2019; 82:2211-2219. [PMID: 31373815 DOI: 10.1021/acs.jnatprod.9b00241] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Five new tetralones, daldiniones A-E (1-5), three new chromones, 7-hydroxy-5-methoxy-2,3-dimethylchromone (9), 5-methoxy-2-propylchromone (10), and 7-ethyl-8-hydroxy-6-methoxy-2,3-dimethylchromone (11), and two new lactones, helicascolides D and E (16 and 17), together with nine known metabolites (6-8, 12-15, and 18-19) were isolated from the mangrove-derived fungus Daldinia eschscholtzii HJ004. The structures and absolute configurations of the new compounds were determined by analyzing MS and NMR data and utilizing GIAO based 13C NMR chemical shift calculations and quantum chemical electronic circular dichroism (ECD) calculations. Compounds 9, 13, and 18 showed inhibitory activities against α-glucosidase with IC50 values of 13, 15, and 16 μM, respectively.
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Affiliation(s)
- Hai-Xia Liao
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering , Hainan Normal University , Haikou , Hainan 571158 , People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province , Haikou , Hainan 571158 , People's Republic of China
- Key Laboratory of Marine Drugs, the Ministry of Education of China, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , People's Republic of China
- Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science , Yulin Normal University , Yulin , Guangxi 537000 , People's Republic of China
| | - Cai-Juan Zheng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering , Hainan Normal University , Haikou , Hainan 571158 , People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province , Haikou , Hainan 571158 , People's Republic of China
| | - Guo-Lei Huang
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering , Hainan Normal University , Haikou , Hainan 571158 , People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province , Haikou , Hainan 571158 , People's Republic of China
| | - Rong-Qing Mei
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering , Hainan Normal University , Haikou , Hainan 571158 , People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province , Haikou , Hainan 571158 , People's Republic of China
| | - Xu-Hua Nong
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering , Hainan Normal University , Haikou , Hainan 571158 , People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province , Haikou , Hainan 571158 , People's Republic of China
| | - Tai-Ming Shao
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering , Hainan Normal University , Haikou , Hainan 571158 , People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province , Haikou , Hainan 571158 , People's Republic of China
- Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science , Yulin Normal University , Yulin , Guangxi 537000 , People's Republic of China
| | - Guang-Ying Chen
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering , Hainan Normal University , Haikou , Hainan 571158 , People's Republic of China
- Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province , Haikou , Hainan 571158 , People's Republic of China
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, the Ministry of Education of China, School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , People's Republic of China
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22
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Li YL, Gao Y, Liu CY, Sun CJ, Zhao ZT, Lou HX. Asperunguisins A-F, Cytotoxic Asperane Sesterterpenoids from the Endolichenic Fungus Aspergillus unguis. JOURNAL OF NATURAL PRODUCTS 2019; 82:1527-1534. [PMID: 31117521 DOI: 10.1021/acs.jnatprod.8b01066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Six new asperane-type sesterterpenoids, asperunguisins A-F (1-6), were isolated from the endolichenic fungus Aspergillus unguis, together with a known analogue, aspergilloxide (7); these are rare asperane-type sesterterpenoids, characterized by a unique hydroxylated 7/6/6/5 tetracyclic system. The structures of asperunguisins A-F (1-6) were elucidated on the basis of spectroscopic methods (NMR and HRESIMS), X-ray single-crystal diffraction analysis, ECD calculations, and biogenetic considerations. Asperunguisin C (3) showed cytotoxicity against the human cancer cell line A549 with an IC50 value of 6.2 μM. Further investigation revealed that the observed cell death was a result of G0/G1 cell cycle arrest via DNA damage followed by cellular apoptosis.
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Affiliation(s)
- Yue-Lan Li
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , Jinan 250012 , People's Republic of China
| | - Yun Gao
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , Jinan 250012 , People's Republic of China
| | - Chun-Yu Liu
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , Jinan 250012 , People's Republic of China
| | - Chun-Jing Sun
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , Jinan 250012 , People's Republic of China
| | - Zun-Tian Zhao
- College of Life Sciences , Shandong Normal University , Jinan 250014 , People's Republic of China
| | - Hong-Xiang Lou
- Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , Jinan 250012 , People's Republic of China
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23
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Shi HZ, Chang WQ, Zhang M, Lou HX. Two natural molecules preferentially inhibit azole-resistant Candida albicans with MDR1 hyperactivation. Chin J Nat Med 2019; 17:209-217. [PMID: 30910057 DOI: 10.1016/s1875-5364(19)30023-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Indexed: 11/25/2022]
Abstract
Antifungal drug resistance is a significant clinical problem, and antifungal agents that can evade resistance are urgently needed. In infective niches, resistant organisms often co-existed with sensitive ones, or a subpopulation of antibiotic-susceptible organisms may evolve into resistant ones during antibiotic treatment and eventually dominate the whole population. In this study, we established a co-culture assay in which an azole-resistant Candida albicans strain was mixed with a susceptible strain labeled with green fluorescent protein to mimic in vivo conditions and screen for antifungal drugs. Fluconazole was used as a positive control to verify the validity of this co-culture assay. Five natural molecules exhibited antifungal activity against both susceptible and resistant C. albicans. Two of these compounds, retigeric acid B (RAB) and riccardin D (RD), preferentially inhibited C. albicans strains in which the efflux pump MDR1 was activated. This selectivity was attributed to greater intracellular accumulation of the drugs in the resistant strains. Changes in sterol and lipid compositions were observed in the resistant strains compared to the susceptible strain, and might increase cell permeability to RAB and RD. In addition, RAB and RD interfered with the sterol pathway, further aggregating the decrease in ergosterol in the sterol synthesis pathway in the MDR1-activated strains. Our findings here provide an alternative for combating resistant pathogenic fungi.
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Affiliation(s)
- Hong-Zhuo Shi
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Wen-Qiang Chang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Ming Zhang
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China.
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24
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Mishra UK, Patel K, Ramasastry SSV. Synthesis of Cyclopropanoids via Substrate-Based Cyclization Pathways. Org Lett 2019; 21:175-179. [PMID: 30543443 DOI: 10.1021/acs.orglett.8b03537] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A series of unexpected reactions triggered by the dimethyloxosulfonium methylide led to the discovery of unconventional approaches for the synthesis of cyclopropa-fused tetralones and indeno-spirocyclopropanes. These highly functionalized structures were further elaborated in one step to privileged scaffolds such as tetralones, indenones, and fluorenones. As a whole, the results presented herein establish new diversity-oriented folding pathways.
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Affiliation(s)
- Uttam K Mishra
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences , Indian Institute of Science Education and Research (IISER) Mohali , Sector 81 , Manauli PO, S. A. S. Nagar, Punjab 140306 , India
| | - Kaushalendra Patel
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences , Indian Institute of Science Education and Research (IISER) Mohali , Sector 81 , Manauli PO, S. A. S. Nagar, Punjab 140306 , India
| | - S S V Ramasastry
- Organic Synthesis and Catalysis Lab, Department of Chemical Sciences , Indian Institute of Science Education and Research (IISER) Mohali , Sector 81 , Manauli PO, S. A. S. Nagar, Punjab 140306 , India
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25
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Li G, Xu K, Chen WQ, Guo ZH, Liu YT, Qiao YN, Sun Y, Sun G, Peng XP, Lou HX. Heptaketides from the endophytic fungus Pleosporales sp. F46 and their antifungal and cytotoxic activities. RSC Adv 2019; 9:12913-12920. [PMID: 35520807 PMCID: PMC9063763 DOI: 10.1039/c9ra01956a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 04/12/2019] [Indexed: 11/21/2022] Open
Abstract
New bioactive heptaketide derivatives were isolated and characterized from an endophytic fungus, Pleosporales sp. F46.
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Del Frari G, Gobbi A, Aggerbeck MR, Oliveira H, Hansen LH, Ferreira RB. Characterization of the Wood Mycobiome of Vitis vinifera in a Vineyard Affected by Esca. Spatial Distribution of Fungal Communities and Their Putative Relation With Leaf Symptoms. FRONTIERS IN PLANT SCIENCE 2019; 10:910. [PMID: 31354777 PMCID: PMC6640213 DOI: 10.3389/fpls.2019.00910] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 06/26/2019] [Indexed: 05/12/2023]
Abstract
Esca is a disease complex belonging to the grapevine trunk diseases cluster. It comprises five syndromes, three main fungal pathogenic agents and several symptoms, both internal (i.e., affecting woody tissue) and external (e.g., affecting leaves and bunches). The etiology and epidemiology of this disease complex remain, in part, unclear. Some of the points that are still under discussion concern the sudden rise in disease incidence, the simultaneous presence of multiple wood pathogens in affected grapevines, the causal agents and the discontinuity in time of leaf symptoms manifestation. The standard approach to the study of esca has been mostly through culture-dependent studies, yet, leaving many questions unanswered. In this study, we used Illumina® next-generation amplicon sequencing to investigate the mycobiome of grapevines wood in a vineyard with history of esca. We characterized the wood mycobiome composition, investigated the spatial dynamics of the fungal communities in different areas of the stem and in canes, and assessed the putative link between mycobiome and leaf symptoms. An unprecedented diversity of fungi is presented (289 taxa), including five genera reported for the first time in association with grapevines wood (Debaryomyces, Trematosphaeria, Biatriospora, Lopadostoma, and Malassezia) and numerous hitherto unreported species. Esca-associated fungi Phaeomoniella chlamydospora and Fomitiporia sp. dominate the fungal community, and numerous other fungi associated with wood syndromes are also encountered (e.g., Eutypa spp., Inonotus hispidus). The spatial analysis revealed differences in diversity, evenness and taxa abundances, the unique presence of certain fungi in specific areas of the plants, and tissue specificity. Lastly, the mycobiome composition of the woody tissue in proximity to leaves manifesting 'tiger stripes' symptoms of esca, as well as in leaf-symptomatic canes, was highly similar to that of plants not exhibiting any leaf symptomatology. This observation supports the current understanding that leaf symptoms are not directly linked with the fungal communities in the wood. This work builds to the understanding of the microbial ecology of the grapevines wood, offering insights and a critical view on the current knowledge of the etiology of esca.
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Affiliation(s)
- Giovanni Del Frari
- LEAF – Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, University of Lisbon, Lisbon, Portugal
- *Correspondence: Giovanni Del Frari,
| | - Alex Gobbi
- Environmental Microbial Genomics Group, Section for Environmental Microbiology and Biotechnology, Department of Environmental Science, Aarhus University, Roskilde, Denmark
| | - Marie Rønne Aggerbeck
- Environmental Microbial Genomics Group, Section for Environmental Microbiology and Biotechnology, Department of Environmental Science, Aarhus University, Roskilde, Denmark
| | - Helena Oliveira
- LEAF – Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, University of Lisbon, Lisbon, Portugal
| | - Lars Hestbjerg Hansen
- Environmental Microbial Genomics Group, Section for Environmental Microbiology and Biotechnology, Department of Environmental Science, Aarhus University, Roskilde, Denmark
| | - Ricardo Boavida Ferreira
- LEAF – Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, University of Lisbon, Lisbon, Portugal
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Li YL, Zhu RX, Li G, Wang NN, Liu CY, Zhao ZT, Lou HX. Secondary metabolites from the endolichenic fungus Ophiosphaerella korrae. RSC Adv 2019; 9:4140-4149. [PMID: 35520149 PMCID: PMC9060614 DOI: 10.1039/c8ra10329a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 01/12/2019] [Indexed: 12/28/2022] Open
Abstract
The isolation of the cytotoxic fractions from the endolichenic fungus Ophiosphaerella korrae yielded six new metabolites, including five polyketides (ophiofuranones A (1) and B (2), with unusual furopyran-3,4-dione-fused heterocyclic skeletons, ophiochromanone (3), ophiolactone (4), and ophioisocoumarin (5)), one sesquiterpenoid ophiokorrin (10), and nine known compounds. Their structures were established on the basis of the analysis of HRESIMS and NMR spectroscopic data. ECD calculations, GIAO NMR shift calculations and single-crystal X-ray diffraction were employed for the stereo-structure determination. A plausible biogenetic pathway for the ophiofuranones A (1) and B (2) was proposed. The cytotoxic assay suggested that the five known perylenequinones mainly contributed to the cytoxicity of the extract. Further phytotoxic studies indicated that ophiokorrin inhibited root elongation in the germination of Arabidopsis thaliana with an IC50 value of 18.06 μg mL−1. Six new metabolites were isolated from the endolichenic fungus Ophiosphaerella korrae. Ophiokorrin inhibited root elongation in the germination of Arabidopsis thaliana.![]()
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Affiliation(s)
- Yue-Lan Li
- Department of Natural Product Chemistry
- Key Lab of Chemical Biology (MOE)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
| | - Rong-Xiu Zhu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Gang Li
- Department of Natural Medicinal Chemistry and Pharmacognosy
- School of Pharmacy
- Qingdao University
- Qingdao 266021
- People's Republic of China
| | - Ning-Ning Wang
- Department of Natural Product Chemistry
- Key Lab of Chemical Biology (MOE)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
| | - Chun-Yu Liu
- Department of Natural Product Chemistry
- Key Lab of Chemical Biology (MOE)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
| | - Zun-Tian Zhao
- College of Life Sciences
- Shandong Normal University
- Jinan 250014
- People's Republic of China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry
- Key Lab of Chemical Biology (MOE)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
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28
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Xu K, Gao Y, Li YL, Xie F, Zhao ZT, Lou HX. Cytotoxic p-Terphenyls from the Endolichenic Fungus Floricola striata. JOURNAL OF NATURAL PRODUCTS 2018; 81:2041-2049. [PMID: 30137985 DOI: 10.1021/acs.jnatprod.8b00362] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Eleven new p-terphenyls, floricolins K-U (1-11), together with 13 biosynthetically related known compounds (12-24) were isolated from an endolichenic fungus, Floricola striata. Their structures were elucidated by extensive spectroscopic analyses and single-crystal X-ray diffraction measurements. The newly isolated p-terphenyls inhibited the growth of A2780, MCF-7, and A549 cell lines. Further evaluation for the multidrug resistance (MDR) reversal activity of compound 5 revealed it enhanced the sensitivity of MCF-7/ADR cells toward adriamycin 39-fold at 10 μM through modulating P-glycoprotein-mediated drug exclusion.
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Affiliation(s)
- Ke Xu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
| | - Yun Gao
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
| | - Yue-Lan Li
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
| | - Fei Xie
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
| | - Zun-Tian Zhao
- College of Life Sciences , Shandong Normal University , No. 88 East Wenhua Road , Jinan 250014 , People's Republic of China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
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30
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Padumadasa C, Xu YM, Wijeratne EMK, Espinosa-Artiles P, U'Ren JM, Arnold AE, Gunatilaka AAL. Cytotoxic and Noncytotoxic Metabolites from Teratosphaeria sp. FL2137, a Fungus Associated with Pinus clausa. JOURNAL OF NATURAL PRODUCTS 2018; 81:616-624. [PMID: 29373790 DOI: 10.1021/acs.jnatprod.7b00838] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new naphthoquinone, teratosphaerone A (1), four new naphthalenones, namely, teratosphaerone B (2), structurally related to 1, iso-balticol B (3), iso-balticol B-4,9-acetonide (4), and (+)-balticol C (5), a new furanonaphthalenone, (3a S,9 R,9a S)-1(9a),3(3a),9-hexahydromonosporascone (6), and the known metabolite monosporascone (7) were isolated from Teratosphaeria sp. FL2137, a fungal strain inhabiting the internal tissue of recently dead but undecomposed foliage of Pinus clausa. The structures of 1-6 were elucidated on the basis of their spectroscopic data including 2D NMR, and absolute configurations of 2, 3, and 6 were determined by the modified Mosher's ester method. When evaluated in a panel of five tumor cell lines, metabolites 1 and 7 isolated from a cytotoxic fraction of the extract exhibited moderate selectivity for metastatic breast adenocarcinoma cell line MDA-MB-231. Of these, 1 showed cytotoxicity to this cell line with an IC50 of 1.2 ± 0.1 μM.
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Affiliation(s)
- Chayanika Padumadasa
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
- Department of Chemistry, Faculty of Applied Sciences , University of Sri Jayewardenepura , Gangodawila, Nugegoda , Sri Lanka
| | - Ya-Ming Xu
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - E M Kithsiri Wijeratne
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - Patricia Espinosa-Artiles
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - Jana M U'Ren
- Department of Agricultural and Biosystems Engineering, College of Agriculture and Life Sciences , University of Arizona , Tucson , Arizona 85721 , United States
| | - A Elizabeth Arnold
- School of Plant Sciences, College of Agriculture and Life Sciences , University of Arizona , Tucson , Arizona 85721 , United States
| | - A A Leslie Gunatilaka
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
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31
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Li Y, Zhu R, Zhang J, Xie F, Wang X, Xu K, Qiao Y, Zhao Z, Lou H. Ophiosphaerellins A-I, Polyketide-Derived Compounds from the Endolichenic Fungus Ophiosphaerella korrae. ACS OMEGA 2018; 3:176-180. [PMID: 30023771 PMCID: PMC6045351 DOI: 10.1021/acsomega.7b01668] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 12/25/2017] [Indexed: 05/17/2023]
Abstract
Ophiosphaerellins A-I (1-9), the first example of bicyclo[4.1.0]heptenones, as well as their biosynthetic relatives ophiosphaerekorrins A-B (10-11) were isolated from the endolichenic fungus Ophiosphaerella korrae. Biosynthetically, they were derived from the polyketide pathway, and their absolute configurations were determined on the basis of the combination analysis of spectral data, circular dichroism calculations, and single-crystal X-ray diffraction measurement. Preliminary test with thin-layer chromatography bioautography found that this type of compounds showed moderate acetylcholinesterase (AChE) inhibitory effects.
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Affiliation(s)
- Yuelan Li
- Department
of Natural Products Chemistry, Key Lab of Chemical Biology (MOE),
School of Pharmaceutical Sciences, Shandong
University, No. 44 West
Wenhua Road, Jinan 250012, People’s Republic of China
| | - Rongxiu Zhu
- School
of Chemistry and Chemical Engineering, Shandong
University, No. 27 Shanda
Nanlu, Jinan 250100, People’s Republic of China
| | - Jiaozhen Zhang
- Department
of Natural Products Chemistry, Key Lab of Chemical Biology (MOE),
School of Pharmaceutical Sciences, Shandong
University, No. 44 West
Wenhua Road, Jinan 250012, People’s Republic of China
| | - Fei Xie
- Department
of Natural Products Chemistry, Key Lab of Chemical Biology (MOE),
School of Pharmaceutical Sciences, Shandong
University, No. 44 West
Wenhua Road, Jinan 250012, People’s Republic of China
| | - Xiaoning Wang
- Department
of Natural Products Chemistry, Key Lab of Chemical Biology (MOE),
School of Pharmaceutical Sciences, Shandong
University, No. 44 West
Wenhua Road, Jinan 250012, People’s Republic of China
| | - Ke Xu
- Department
of Natural Products Chemistry, Key Lab of Chemical Biology (MOE),
School of Pharmaceutical Sciences, Shandong
University, No. 44 West
Wenhua Road, Jinan 250012, People’s Republic of China
| | - Yanan Qiao
- Department
of Natural Products Chemistry, Key Lab of Chemical Biology (MOE),
School of Pharmaceutical Sciences, Shandong
University, No. 44 West
Wenhua Road, Jinan 250012, People’s Republic of China
| | - Zuntian Zhao
- College
of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan 250014, People’s Republic of China
| | - Hongxiang Lou
- Department
of Natural Products Chemistry, Key Lab of Chemical Biology (MOE),
School of Pharmaceutical Sciences, Shandong
University, No. 44 West
Wenhua Road, Jinan 250012, People’s Republic of China
- E-mail:
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32
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Qi B, Liu X, Mo T, Li SS, Wang J, Shi XP, Wang XH, Zhu ZX, Zhao YF, Jin HW, Tu PF, Shi SP. Nitric oxide inhibitory polyketides from Penicillium chrysogenum MT-12, an endophytic fungus isolated from Huperzia serrata. Fitoterapia 2017; 123:35-43. [PMID: 28958955 DOI: 10.1016/j.fitote.2017.09.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 09/13/2017] [Accepted: 09/19/2017] [Indexed: 11/17/2022]
Abstract
Twelve new polyketides, penicichrysogenins A-L (1-10, 11a, and 11b) along with five known compounds (12a, 12b, and 13-15) were isolated from the solid substrate fermentation cultures of a Huperzia serrata endophytic fungus Penicillium chrysogenum MT-12. The structures of the new compounds were established using extensive spectroscopic (1D and 2D NMR, IR, and HRESIMS) and calculated electronic circular dichroism (ECD) methods. Compounds 11a/11b and 12a/12b were two pairs of enantiomers successfully separated by chiral HPLC resolution. Compounds 4, 5, 8, 9, 11a/11b, and 12a/12b exhibited inhibition of nitric oxide production in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophage cells with IC50 values in the range of 17.5-98.4μM.
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Affiliation(s)
- Bowen Qi
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Xiao Liu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Ting Mo
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Shan-Shan Li
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Juan Wang
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Xiao-Ping Shi
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Xiao-Hui Wang
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Zhi-Xiang Zhu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Yun-Fang Zhao
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Hong-Wei Jin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Peng-Fei Tu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - She-Po Shi
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China.
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Hu CH, Zhou YH, Xie F, Li YL, Zhao ZT, Lou HX. Two new α-pyrone derivatives from an endolichenic fungus Tolypocladium sp. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2017; 19:786-792. [PMID: 28276758 DOI: 10.1080/10286020.2017.1283311] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 01/13/2017] [Indexed: 06/06/2023]
Abstract
Two new α-pyrone derivatives, tolypocladones A (1) and B (2), together with five known compounds were isolated from an endolichenic fungus Tolypocladium sp. (4259a). The structures of all the compounds were determined by analysis of their MS and NMR data. Among them, compound 1 was an enantiomeric mixture and the configuration was established by single-crystal X-ray diffraction analysis using Cu-Kα radiation. Also, this is the first report of the presence of compound 3 (glycine, N-(2,3-dihydroxybenzoyl)-methyl ester) and compound 4 (2H-pyran-2-one, 4-methoxy-6-(1,3-pentadienyl)) as natural products.
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Affiliation(s)
- Chu-Hong Hu
- a Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education , Shandong University , Jinan 250012 , China
| | - Yan-Hui Zhou
- a Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education , Shandong University , Jinan 250012 , China
| | - Fei Xie
- a Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education , Shandong University , Jinan 250012 , China
| | - Yue-Lan Li
- a Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education , Shandong University , Jinan 250012 , China
| | - Zun-Tian Zhao
- a Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education , Shandong University , Jinan 250012 , China
| | - Hong-Xiang Lou
- a Department of Natural Products Chemistry, Key Lab of Chemical Biology of Ministry of Education , Shandong University , Jinan 250012 , China
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34
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Pang X, Lin X, Tian Y, Liang R, Wang J, Yang B, Zhou X, Kaliyaperumal K, Luo X, Tu Z, Liu Y. Three new polyketides from the marine sponge-derived fungus Trichoderma sp. SCSIO41004. Nat Prod Res 2017; 32:105-111. [PMID: 28592143 DOI: 10.1080/14786419.2017.1338286] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Three new polyketides named trichbenzoisochromen A (1), 5,7-dihydroxy-3-methyl -2-(2-oxopropyl)naphthalene-1,4-dione (2) and 7-acetyl-1,3,6-trihydroxyanthracene-9,10- dione (3) together with six known compounds (4-9) were isolated from a sponge-derived fungus Trichoderma sp. SCSIO41004. The structures of three new polyketides (1-3) were determined by the extensive spectroscopic analysis, including 1D, 2D NMR and HRESIMS data. The absolute configuration of compound 1 was confirmed by the specific optical rotation value and CD spectra analyses. Compound 4 exhibited significant inhibitory activity against EV71 with the IC50 value of 25.7 μM.
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Affiliation(s)
- Xiaoyan Pang
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Xiuping Lin
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China
| | - Yongqi Tian
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Rui Liang
- c Drug Discovery Pipeline/Guangdong Provincial Key Laboratory of Biocomputing , Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences , Guangzhou , China
| | - Junfeng Wang
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China
| | - Bin Yang
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China
| | - Xuefeng Zhou
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China
| | - Kumaravel Kaliyaperumal
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China
| | - Xiaowei Luo
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Zhengchao Tu
- c Drug Discovery Pipeline/Guangdong Provincial Key Laboratory of Biocomputing , Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences , Guangzhou , China
| | - Yonghong Liu
- a CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou , China.,b University of Chinese Academy of Sciences , Beijing , China.,d South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center , Guangzhou , China
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Zhang M, Chang W, Shi H, Zhou Y, Zheng S, Li Y, Li L, Lou H. Biatriosporin D displays anti-virulence activity through decreasing the intracellular cAMP levels. Toxicol Appl Pharmacol 2017; 322:104-112. [PMID: 28286116 DOI: 10.1016/j.taap.2017.03.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 03/01/2017] [Accepted: 03/06/2017] [Indexed: 12/15/2022]
Abstract
Candidiasis has long been a serious human health problem, and novel antifungal approaches are greatly needed. During both superficial and systemic infection, C. albicans relies on a battery of virulence factors, such as adherence, filamentation, and biofilm formation. In this study, we found that a small phenolic compound, Biatriosporin D (BD), isolated from an endolichenic fungus, Biatriospora sp., displayed anti-virulence activity by inhibiting adhesion, hyphal morphogenesis and biofilm formation of C. albicans. Of note is the high efficacy of BD in preventing filamentation with a much lower dose than its MIC value. Furthermore, BD prolonged the survival of worms infected by C. albicans in vivo. Quantitative real-time PCR analysis, exogenous cAMP rescue experiments and intracellular cAMP measurements revealed that BD regulates the Ras1-cAMP-Efg1 pathway by reducing cAMP levels to inhibit the hyphal formation. Further investigation showed that BD could upregulate Dpp3 to synthesize much more farnesol, which could inhibit the activity of Cdc35 and reduce the generation of cAMP. Taken together, these findings indicate that BD stimulates the expression of Dpp3 to synthesize more farnesol that directly inhibits the Cdc35 activity, reducing intracellular cAMP and thereby disrupting the morphologic transition and attenuating the virulence of C. albicans. Our study uncovers the underlying mechanism of BD as a prodrug in fighting against pathogenic C. albicans and provides a potential application of BD in fighting clinically relevant fungal infections by targeting fungal virulence.
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Affiliation(s)
- Ming Zhang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, Shandong University, No. 44 West Wenhua Road, Jinan City, Shandong Province, China
| | - Wenqiang Chang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, Shandong University, No. 44 West Wenhua Road, Jinan City, Shandong Province, China
| | - Hongzhuo Shi
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, Shandong University, No. 44 West Wenhua Road, Jinan City, Shandong Province, China
| | - Yanhui Zhou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, Shandong University, No. 44 West Wenhua Road, Jinan City, Shandong Province, China
| | - Sha Zheng
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, Shandong University, No. 44 West Wenhua Road, Jinan City, Shandong Province, China
| | - Ying Li
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, Shandong University, No. 44 West Wenhua Road, Jinan City, Shandong Province, China
| | - Lin Li
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, Shandong University, No. 44 West Wenhua Road, Jinan City, Shandong Province, China
| | - Hongxiang Lou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, Shandong University, No. 44 West Wenhua Road, Jinan City, Shandong Province, China.
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