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Chen HW, Yan LH, Wang XJ, Zhao ZY, Wu X, Li J, Lei XS, Xiong J, Hu JF. Undescribed polyketides from endophytes associated with the critically endangered conifer Abies beshanzuensis. Fitoterapia 2024; 177:106104. [PMID: 38950637 DOI: 10.1016/j.fitote.2024.106104] [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: 04/20/2024] [Revised: 06/21/2024] [Accepted: 06/27/2024] [Indexed: 07/03/2024]
Abstract
Four undescribed polyketides, beshanzones A (1) and B (2) as well as beshanhexanols A (3) and B (4), along with three known ones (5-7) were isolated from the rice fermentation of two endophytic fungi associated with the critically endangered Chinese endemic conifer Abies beshanzuensis. γ-Butyrolactone derivatives 1, 2, and 5 were isolated from Phomopsis sp. BSZ-AZ-2, an interesting strain that drawn our attention this time. The cyclohexanol derivatives 3, 4, 6, and 7 were obtained during a follow-up investigation on Penicillium commune BSZ-P-4-1. The chemical structures including absolute configurations of compounds 1-4 were determined by spectroscopic methods, Mo2(OAc)4 induced electronic circular dichroism (IECD), GIAO NMR calculations and DP4+ probability analyses. In particular, compound 2 contains a novel 5/5 bicyclic ring system, which might be biogenetically derived from the known compound 5 through hydrolysis followed by an Aldol reaction. All isolates were evaluated for their antimicrobial activities against a small panel of bacterial and fungal pathogens. Compounds 6 and 7 showed moderate inhibitory activities against Candida albicans, with MIC values of 16 and 32 μg/mL, respectively.
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Affiliation(s)
- Hao-Wei Chen
- School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Zhejiang 318000, PR China; School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Li-Hong Yan
- School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Zhejiang 318000, PR China
| | - Xue-Jiao Wang
- School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Zhejiang 318000, PR China; School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Ze-Yu Zhao
- School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Zhejiang 318000, PR China; School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Xiying Wu
- School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Zhejiang 318000, PR China; School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Jiyang Li
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Xin-Sheng Lei
- School of Pharmacy, Fudan University, Shanghai 201203, PR China
| | - Juan Xiong
- School of Pharmacy, Fudan University, Shanghai 201203, PR China.
| | - Jin-Feng Hu
- School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Zhejiang 318000, PR China; School of Pharmacy, Fudan University, Shanghai 201203, PR China.
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2
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Zhou B, Tong Q, Zang Y, Zhu H. Two new α-pyrone-containing polyketides isolated from the fungus Aspergillus aureoterreus. Nat Prod Res 2023; 37:3207-3213. [PMID: 35412412 DOI: 10.1080/14786419.2022.2062753] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 03/28/2022] [Accepted: 03/31/2022] [Indexed: 10/18/2022]
Abstract
Two undescribed α-pyrone-containing polyketide derivatives designated aurovertins V (1) and W (2), and a known analogue (3), were isolated from the fungus Aspergillus aureoterreus. Their structures including the absolute configuration were elucidated on the basis of extensive spectroscopic methods and theoretical ECD calculation. Compound 1 is the first example of aurovertins with a 7R configuration, whereas 2 comprises a S configuration for C-6 and a Z geometry of the double bond Δ8. Both 1 and 2 showed no cytotoxicity against human cancer cell lines HL-60, SU-DHL-2 and U266) at the concentration of 20.0 μM.
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Affiliation(s)
- Beiping Zhou
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
- Key Laboratory of Agricultural Microbiomics and Precision Application-Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Microbial Culture Center (GDMCC), Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Qingyi Tong
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Zang
- Key Laboratory of Agricultural Microbiomics and Precision Application-Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Microbial Culture Center (GDMCC), Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Honghui Zhu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
- Key Laboratory of Agricultural Microbiomics and Precision Application-Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Microbial Culture Center (GDMCC), Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
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3
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Two New 4-Hydroxy-2-pyridone Alkaloids with Antimicrobial and Cytotoxic Activities from Arthrinium sp. GZWMJZ-606 Endophytic with Houttuynia cordata Thunb. Molecules 2023; 28:molecules28052192. [PMID: 36903438 PMCID: PMC10005160 DOI: 10.3390/molecules28052192] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/22/2023] [Accepted: 02/22/2023] [Indexed: 03/02/2023] Open
Abstract
Two new 4-hydroxy-2-pyridone alkaloids furanpydone A and B (1 and 2), along with two known compounds N-hydroxyapiosporamide (3) and apiosporamide (4) were isolated from the endophytic fungus Arthrinium sp. GZWMJZ-606 in Houttuynia cordata Thunb. Furanpydone A and B had unusual 5-(7-oxabicyclo[2.2.1]heptane)-4-hydroxy-2-pyridone skeleton. Their structures including absolute configurations were determined on the basis of spectroscopic analysis, as well as the X-ray diffraction experiment. Compound 1 showed inhibitory activity against ten cancer cell lines (MKN-45, HCT116, K562, A549, DU145, SF126, A-375, 786O, 5637, and PATU8988T) with IC50 values from 4.35 to 9.72 µM. Compounds 1, 3 and 4 showed moderate inhibitory effects against four Gram-positive strains (Staphylococcus aureus, methicillin-resistant S. aureus, Bacillus Subtilis, Clostridium perfringens) and one Gram-negative strain (Ralstonia solanacarum) with MIC values from 1.56 to 25 µM. However, compounds 1-4 showed no obvious inhibitory activity against two Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa) and two pathogenic fungi (Candida albicans and Candida glabrata) at 50 µM. These results show that compounds 1-4 are expected to be developed as lead compounds for antibacterial or anti-tumor drugs.
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Zhu YX, Ding W, Hu JF, Xiong J, Li J. Beshanzuamide A, an unprecedented prenylated indole alkaloid produced by Aspergillus sp. Y-2 from the critically endangered conifer Abies beshanzuensis. RSC Adv 2022; 12:10534-10539. [PMID: 35425024 PMCID: PMC8985211 DOI: 10.1039/d2ra01578a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 03/30/2022] [Indexed: 12/25/2022] Open
Abstract
A structurally unprecedented prenylated indole alkaloid, beshanzuamide A (1), together with five known analogues (2–6) were isolated and identified from the endophytic fungus derived from the needles of the critically endangered conifer Abies beshanzuensis. The new structure was determined by extensive spectroscopic methods and quantum chemical calculations of NMR and electronic circular dichroism (ECD) data. Compound 1 features a unique N,O-spiroketal/δ-lactone motif connected to a pyranoindole-derived bicyclo[2.2.2]diazaoctane ring. A plausible biogenetic pathway for the assembly of 1 was proposed. A structurally unprecedented prenylated indole alkaloid, together with five known analogues, was isolated from an endophytic fungus associated with the endangered conifer Abies beshanzuensis.![]()
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Affiliation(s)
- Yuan-Xing Zhu
- Department of Biological Medicines, School of Pharmacy, Fudan University Shanghai 201203 China
| | - Wenxin Ding
- Department of Biological Medicines, School of Pharmacy, Fudan University Shanghai 201203 China
| | - Jin-Feng Hu
- Department of Natural Medicines, School of Pharmacy, Fudan University Shanghai 201203 China
| | - Juan Xiong
- Department of Natural Medicines, School of Pharmacy, Fudan University Shanghai 201203 China
| | - Jiyang Li
- Department of Biological Medicines, School of Pharmacy, Fudan University Shanghai 201203 China
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Deshmukh SK, Dufossé L, Chhipa H, Saxena S, Mahajan GB, Gupta MK. Fungal Endophytes: A Potential Source of Antibacterial Compounds. J Fungi (Basel) 2022; 8:164. [PMID: 35205918 PMCID: PMC8877021 DOI: 10.3390/jof8020164] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 02/04/2022] [Accepted: 02/05/2022] [Indexed: 02/04/2023] Open
Abstract
Antibiotic resistance is becoming a burning issue due to the frequent use of antibiotics for curing common bacterial infections, indicating that we are running out of effective antibiotics. This has been more obvious during recent corona pandemics. Similarly, enhancement of antimicrobial resistance (AMR) is strengthening the pathogenicity and virulence of infectious microbes. Endophytes have shown expression of various new many bioactive compounds with significant biological activities. Specifically, in endophytic fungi, bioactive metabolites with unique skeletons have been identified which could be helpful in the prevention of increasing antimicrobial resistance. The major classes of metabolites reported include anthraquinone, sesquiterpenoid, chromone, xanthone, phenols, quinones, quinolone, piperazine, coumarins and cyclic peptides. In the present review, we reported 451 bioactive metabolites isolated from various groups of endophytic fungi from January 2015 to April 2021 along with their antibacterial profiling, chemical structures and mode of action. In addition, we also discussed various methods including epigenetic modifications, co-culture, and OSMAC to induce silent gene clusters for the production of noble bioactive compounds in endophytic fungi.
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Affiliation(s)
- Sunil K Deshmukh
- TERI-Deakin Nano Biotechnology Centre, The Energy and Resources Institute, Darbari Seth Block, IHC Complex, Lodhi Road, New Delhi 110003, Delhi, India
- Agpharm Bioinnovations LLP, Incubatee: Science and Technology Entrepreneurs Park (STEP), Thapar Institute of Engineering and Technology, Patiala 147004, Punjab, India
| | - Laurent Dufossé
- Chimie et Biotechnologie des Produits Naturels (CHEMBIOPRO Lab) & ESIROI Agroalimentaire, Université de la Réunion, 15 Avenue René Cassin, 97744 Saint-Denis, France
| | - Hemraj Chhipa
- College of Horticulture and Forestry, Agriculture University Kota, Jhalawar 322360, Rajasthan, India
| | - Sanjai Saxena
- Agpharm Bioinnovations LLP, Incubatee: Science and Technology Entrepreneurs Park (STEP), Thapar Institute of Engineering and Technology, Patiala 147004, Punjab, India
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Patiala 147004, Punjab, India
| | - Girish B Mahajan
- HiMedia Laboratories Pvt. Ltd., Mumbai 400086, Maharashtra, India
| | - Manish Kumar Gupta
- SGT College of Pharmacy, SGT University, Gurugram 122505, Haryana, India
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Hao Y, Wei L, Li L, Wang Y, Li N, Pan Y, Sun Y. New cytotoxic ergosterols from a plant-associated fungus Colletotrichum magnisporum. Nat Prod Res 2022; 36:5606-5613. [PMID: 34994267 DOI: 10.1080/14786419.2021.2022670] [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
Three new ergosterols, colletosterols A-C (1-3), together with two known analogues 4 and 5, were isolated from the endophytic fungus Colletotrichum magnisporum associated with the leaves of Rauvolfia verticillata by a bioassay-guided fractionation method. The new structures were elucidated on the basis of extensive spectroscopic analyses and electronic circular dichroism (ECD) calculations. All the ergosterols were evaluated for their cytotoxic activities against A549 and HeLa cell lines. Compounds 1-3 exhibited notable cytotoxicity with the IC50 values of 3.76-11.18 μM.
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Affiliation(s)
- Yanqi Hao
- School of Traditional Chinese Materia Medica, Shengyang Pharmaceutical University, Shenyang, PR China.,Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, PR China
| | - Lan Wei
- School of Traditional Chinese Materia Medica, Shengyang Pharmaceutical University, Shenyang, PR China
| | - Li Li
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, PR China
| | - Yanlei Wang
- School of Traditional Chinese Materia Medica, Shengyang Pharmaceutical University, Shenyang, PR China.,Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, PR China
| | - Ning Li
- School of Traditional Chinese Materia Medica, Shengyang Pharmaceutical University, Shenyang, PR China
| | - Yingni Pan
- School of Traditional Chinese Materia Medica, Shengyang Pharmaceutical University, Shenyang, PR China
| | - Yi Sun
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, PR China
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Chen HW, Jiang CX, Li J, Li N, Zang Y, Wu XY, Chen WX, Xiong J, Li J, Hu JF. Beshanzoides A-D, unprecedented cycloheptanone-containing polyketides from Penicillium commune P-4-1, an endophytic fungus of the endangered conifer Abies beshanzuensis. RSC Adv 2021; 11:39781-39789. [PMID: 35494150 PMCID: PMC9044568 DOI: 10.1039/d1ra08377e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 12/07/2021] [Indexed: 12/18/2022] Open
Abstract
A number of previously undescribed (1–7) and structurally related known (8–17) isobenzofuran-type polyketides were obtained from the fermentation of Penicillium commune P-4-1, an endophytic fungus isolated from the fresh trunk bark of the critically endangered conifer Abies beshanzuensis. Beshanzoides A–D (1–4, resp.) feature a cycloheptanone-containing isobenzofuran ring system hitherto unknown, which might be biosynthesized via two steps of aldol reactions starting from a common co-occurring isobenzofuran-type polyketide as the precursor. The new structures were elucidated by spectroscopic methods, electronic circular dichroism data, and single crystal X-ray diffraction analyses. Beshanzoide E (5) showed antimicrobial activity (MIC: 16 μg mL−1) against Staphylococcus aureus, whereas (±)-strobide A (10) inhibited (MIC: 16 μg mL−1) Candida albicans. Cyclopaldic acid (12) and 3-O-methyl-cyclopaldic acid (13) exhibited inhibitory effects against acetyl-CoA carboxylase 1 (ACC1) with IC50 values of 0.96 and 11.77 μM, respectively. Compound 12 also inhibited (IC50: 7.56 μM) ATP-citrate lyase (ACL). Four unprecedented cycloheptanone-containing and some related known bioactive polyketides were isolated from an endophytic fungus associated with the critically endangered conifer Abies beshanzuensis.![]()
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Affiliation(s)
- Hao-Wei Chen
- Department of Natural Medicine, School of Pharmacy, Fudan University Shanghai 201203 PR China .,School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Zhejiang 318000 PR China
| | - Chun-Xiao Jiang
- Department of Natural Medicine, School of Pharmacy, Fudan University Shanghai 201203 PR China .,School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Zhejiang 318000 PR China
| | - Jiyang Li
- Department of Natural Medicine, School of Pharmacy, Fudan University Shanghai 201203 PR China
| | - Na Li
- School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Zhejiang 318000 PR China
| | - Yi Zang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences Shanghai 201203 PR China
| | - Xi-Ying Wu
- Department of Natural Medicine, School of Pharmacy, Fudan University Shanghai 201203 PR China .,Shanghai Skin Disease Hospital, School of Medicine, Tongji University Shanghai 200443 PR China
| | - Wen-Xue Chen
- Department of Chemistry, Fudan University Shanghai 200438 PR China
| | - Juan Xiong
- Department of Natural Medicine, School of Pharmacy, Fudan University Shanghai 201203 PR China
| | - Jia Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences Shanghai 201203 PR China
| | - Jin-Feng Hu
- Department of Natural Medicine, School of Pharmacy, Fudan University Shanghai 201203 PR China .,School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University Zhejiang 318000 PR China
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8
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Chen S, Cai R, Liu Z, Cui H, She Z. Secondary metabolites from mangrove-associated fungi: source, chemistry and bioactivities. Nat Prod Rep 2021; 39:560-595. [PMID: 34623363 DOI: 10.1039/d1np00041a] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Covering 1989 to 2020The mangrove forests are a complex ecosystem occurring at tropical and subtropical intertidal estuarine zones and nourish a diverse group of microorganisms including fungi, actinomycetes, bacteria, cyanobacteria, algae, and protozoa. Among the mangrove microbial community, mangrove associated fungi, as the second-largest ecological group of the marine fungi, not only play an essential role in creating and maintaining this biosphere but also represent a rich source of structurally unique and diverse bioactive secondary metabolites, attracting significant attention of organic chemists and pharmacologists. This review summarizes the discovery relating to the source and characteristics of metabolic products isolated from mangrove-associated fungi over the past thirty years (1989-2020). Its emphasis included 1387 new metabolites from 451 papers, focusing on bioactivity and the unique chemical diversity of these natural products.
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Affiliation(s)
- Senhua Chen
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Runlin Cai
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,College of Science, Shantou University, Shantou 515063, China
| | - Zhaoming Liu
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,State Key Laboratory of Applied Microbiology Southern China, Guangdong Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Hui Cui
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Zhigang She
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.
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Prajapati J, Goswami D, Rawal RM. Endophytic fungi: A treasure trove of novel anticancer compounds. CURRENT RESEARCH IN PHARMACOLOGY AND DRUG DISCOVERY 2021; 2:100050. [PMID: 34909676 PMCID: PMC8663939 DOI: 10.1016/j.crphar.2021.100050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 08/18/2021] [Accepted: 08/31/2021] [Indexed: 12/18/2022] Open
Abstract
Cancer is a multifactorial disease with a convoluted genesis and progression. The emergence of multidrug resistance to presently be offered drug and relapse is by far, the most critical concern to tackle this deteriorating disease. Henceforth, there is undeniably an inflated necessity for safe, promising, and less harmful new anticancer drugs. Natural compounds from various sources like plants, animals, and microorganisms have occupied a center stage in drug discovery due to their tremendous chemical diversity and potential as therapeutic agents. Endophytic microbes are symbiotically associated with plants and have been proven to produce novel or analogues of host bioactive metabolites exhibiting a variety of biological activities including anticancer activity. This review emphasizes on structurally diverse unprecedented anticancer natural compounds that have been reported exclusively from endophytic fungi from 2016 to 2020. It covers chemical nature of metabolites, its fungal source associated with terrestrial, as well as marine plants and anticancer activity based on their cytotoxicity profile against various cancer cell lines. Many of these fungal metabolites with promising anticancer activity can be used as lead molecules for in silico experiments and deserve special attention from scientists for further in vitro and clinical research.
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Affiliation(s)
- Jignesh Prajapati
- Department of Biochemistry & Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Dweipayan Goswami
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Rakesh M. Rawal
- Department of Biochemistry & Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
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