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Zou G, Yang W, Chen T, Liu Z, Chen Y, Li T, Said G, Sun B, Wang B, She Z. Griseofulvin enantiomers and bromine-containing griseofulvin derivatives with antifungal activity produced by the mangrove endophytic fungus Nigrospora sp. QQYB1. MARINE LIFE SCIENCE & TECHNOLOGY 2024; 6:102-114. [PMID: 38433970 PMCID: PMC10902243 DOI: 10.1007/s42995-023-00210-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 10/08/2023] [Indexed: 03/05/2024]
Abstract
Marine microorganisms have long been recognized as potential sources for drug discovery. Griseofulvin was one of the first antifungal natural products and has been used as an antifungal agent for decades. In this study, 12 new griseofulvin derivatives [(±)-1-2, (+)-3, (±)-4, 10-12, and 14-15] and two new griseofulvin natural products (9 and 16) together with six known analogues [(-)-3, 5-8, and 13] were isolated from the mangrove-derived fungus Nigrospora sp. QQYB1 treated with 0.3% NaCl or 2% NaBr in rice solid medium. Their 2D structures and absolute configurations were established by extensive spectroscopic analysis (1D and 2D NMR, HRESIMS), ECD spectra, computational calculation, DP4 + analysis, and X-ray single-crystal diffraction. Compounds 1-4 represent the first griseofulvin enantiomers with four absolute configurations (2S, 6'S; 2R, 6'R; 2S, 6'R; 2R, 6'S), and compounds 9-12 represent the first successful production of brominated griseofulvin derivatives from fungi via the addition of NaBr to the culture medium. In the antifungal assays, compounds 6 and 9 demonstrated significant inhibitory activities against the fungi Colletotrichum truncatum, Microsporum gypseum, and Trichophyton mentagrophyte with inhibition zones varying between 28 and 41 mm (10 μg/disc). The structure-activity relationship (SAR) was analyzed, which showed that substituents at C-6, C-7, C-6' and the positions of the carbonyl and double bond of griseofulvin derivatives significantly affected the antifungal activity. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-023-00210-0.
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Affiliation(s)
- Ge Zou
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
| | - Wencong Yang
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
| | - Tao Chen
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
| | - Zhaoming Liu
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070 China
| | - Yan Chen
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
- School of Pharmacy, Anhui Medical University, Hefei, 230032 China
| | - Taobo Li
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
| | - Gulab Said
- Department of Chemistry, Women University Swabi, Swabi, 23430 Pakistan
| | - Bing Sun
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
| | - Bo Wang
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
| | - Zhigang She
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275 China
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2
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Karami Y, Murail S, Giribaldi J, Lefranc B, Defontaine F, Lesouhaitier O, Leprince J, de Vries S, Tufféry P. Exploring a Structural Data Mining Approach to Design Linkers for Head-to-Tail Peptide Cyclization. J Chem Inf Model 2023; 63:6436-6450. [PMID: 37827517 PMCID: PMC10599322 DOI: 10.1021/acs.jcim.3c00865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Indexed: 10/14/2023]
Abstract
Peptides have recently regained interest as therapeutic candidates, but their development remains confronted with several limitations including low bioavailability. Backbone head-to-tail cyclization, i.e., setting a covalent peptide bond linking the last amino acid with the first one, is one effective strategy of peptide-based drug design to stabilize the conformation of bioactive peptides while preserving peptide properties in terms of low toxicity, binding affinity, target selectivity, and preventing enzymatic degradation. Starting from an active peptide, it usually requires the design of a linker of a few amino acids to make it possible to cyclize the peptide, possibly preserving the conformation of the initial peptide and not affecting its activity. However, very little is known about the sequence-structure relationship requirements of designing linkers for peptide cyclization in a rational manner. Recently, we have shown that large-scale data-mining of available protein structures can lead to the precise identification of protein loop conformations, even from remote structural classes. Here, we transpose this approach to linkers, allowing head-to-tail peptide cyclization. First we show that given a linker sequence and the conformation of the linear peptide, it is possible to accurately predict the cyclized peptide conformation. Second, and more importantly, we show that it seems possible to elaborate on the information inferred from protein structures to propose effective candidate linker sequences constrained by length and amino acid composition, providing the first framework for the rational design of head-to-tail cyclization linkers. Finally, we illustrate this for two peptides using a limited set of amino-acids likely not to interfere with peptide function. For a linear peptide derived from Nrf2, the peptide cyclized starting from the experimental structure showed a 26-fold increase in the binding affinity. For urotensin II, a peptide already cyclized by a disulfide bond that exerts a broad array of biological activities, we were able, starting from models of the structure, to design a head-to-tail cyclized peptide, the first synthesized bicyclic 14-residue long urotensin II analogue, showing a retention of in vitro activity. Although preliminary, our results strongly suggest that such an approach has strong potential for cyclic peptide-based drug design.
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Affiliation(s)
- Yasaman Karami
- Université
Paris Cité, CNRS UMR 8251,
INSERM ERL U1133, 75013 Paris, France
| | - Samuel Murail
- Université
Paris Cité, CNRS UMR 8251,
INSERM ERL U1133, 75013 Paris, France
| | - Julien Giribaldi
- Institut
des Biomolécules Max Mousseron, UMR 5247, Université de Montpellier-CNRS, 34293 Montpellier, France
| | - Benjamin Lefranc
- Université
de Rouen Normandie, INSERM U1239 NorDiC, Neuroendocrine, Endocrine and Germinal Differentiation and Communication,
INSERM US51 HeRacLeS, F-76000 Rouen, France
| | - Florian Defontaine
- Université
de Rouen Normandie, UR CBSA, Research Unit
Bacterial Communication and Anti-infectious Strategies, 27000 Evreux, France
| | - Olivier Lesouhaitier
- Université
de Rouen Normandie, UR CBSA, Research Unit
Bacterial Communication and Anti-infectious Strategies, 27000 Evreux, France
| | - Jérôme Leprince
- Université
de Rouen Normandie, INSERM U1239 NorDiC, Neuroendocrine, Endocrine and Germinal Differentiation and Communication,
INSERM US51 HeRacLeS, F-76000 Rouen, France
| | - Sjoerd de Vries
- Université
Paris Cité, CNRS UMR 8251,
INSERM ERL U1133, 75013 Paris, France
| | - Pierre Tufféry
- Université
Paris Cité, CNRS UMR 8251,
INSERM ERL U1133, 75013 Paris, France
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3
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Synthesis, Anticancer, and Antimicrobial Evaluation of Integerrimide-A. BIOMED RESEARCH INTERNATIONAL 2023. [DOI: 10.1155/2023/9289141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Integerrimide-A (IG-A) is a cyclic heptapeptide that was recently synthesized after being recovered from the latex of the Jatropha integerrima tree. This was achieved by first coupling a tetrapeptide unit (Boc-Gly-L-Leu-L-Leu-L-Leu-OMe) with a tripeptide unit (L-Thr-L-Pro-L-Trp-OMe). The characterization was done by using spectral techniques like FT-IR, 1H-NMR, mass spectrometry, and elemental analysis of the newly synthesized cyclic molecule. Antimicrobial and anticancer properties of IG-A were tested using a biological screening. Gram +ve bacteria (B. subtilis and S. aureus) and Gram -ve bacteria (P. aeruginosa and E. coli) were used in the antibacterial testing. Fungal strains such as C. albicans, A. niger, T. mentagrophytes, and M. audouinii were used to test the antifungal activities. Antimicrobial activity analysis revealed that cyclic peptide—IG-A (8)—has modest antibacterial activity and antifungal activities, when compared with the standard drugs ciprofloxacin and griseofulvin, respectively. Comparable MTT assays were performed on HCT116 (human colon carcinoma) and B16F10 (melanoma cells) cell lines with doxorubicin as the standard drug to determine the cytotoxic activity of the synthesized cyclic peptide. Inhibition of growth of HCT116 and B16F10 cell lines was used to calculate the cytotoxic effect. At a dosage of 120 μg/mL, the cyclopeptide IG-A (8) inhibited cell proliferation by 87.5 and 72.5 percent, respectively. Cyclopeptide IG-A had CTC50 values of 77.65 μM and 68.63 μM against HCT116 and B16F10, respectively. The % growth inhibitions at lesser levels are 72.5 and 50 at 60 μg/mL, respectively. The standard drug inhibited growth by 100 percent with CTC50 values of 48.63 μM and 43.25 μM against HCT116 and B16F10, respectively. From the results, it is concluded that IG-A has considerable antimicrobial and cytotoxic effects. Internucleosomal DNA fragmentation may be the underlying mechanism in HCT116 cells, whereas the suppression of eumelanin synthesis in B16F10 cells is another possibility.
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Marine Cyclic Peptides: Antimicrobial Activity and Synthetic Strategies. Mar Drugs 2022; 20:md20060397. [PMID: 35736200 PMCID: PMC9230156 DOI: 10.3390/md20060397] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/06/2022] [Accepted: 06/13/2022] [Indexed: 01/29/2023] Open
Abstract
Oceans are a rich source of structurally unique bioactive compounds from the perspective of potential therapeutic agents. Marine peptides are a particularly interesting group of secondary metabolites because of their chemistry and wide range of biological activities. Among them, cyclic peptides exhibit a broad spectrum of antimicrobial activities, including against bacteria, protozoa, fungi, and viruses. Moreover, there are several examples of marine cyclic peptides revealing interesting antimicrobial activities against numerous drug-resistant bacteria and fungi, making these compounds a very promising resource in the search for novel antimicrobial agents to revert multidrug-resistance. This review summarizes 174 marine cyclic peptides with antibacterial, antifungal, antiparasitic, or antiviral properties. These natural products were categorized according to their sources—sponges, mollusks, crustaceans, crabs, marine bacteria, and fungi—and chemical structure—cyclic peptides and depsipeptides. The antimicrobial activities, including against drug-resistant microorganisms, unusual structural characteristics, and hits more advanced in (pre)clinical studies, are highlighted. Nocathiacins I–III (91–93), unnarmicins A (114) and C (115), sclerotides A (160) and B (161), and plitidepsin (174) can be highlighted considering not only their high antimicrobial potency in vitro, but also for their promising in vivo results. Marine cyclic peptides are also interesting models for molecular modifications and/or total synthesis to obtain more potent compounds, with improved properties and in higher quantity. Solid-phase Fmoc- and Boc-protection chemistry is the major synthetic strategy to obtain marine cyclic peptides with antimicrobial properties, and key examples are presented guiding microbiologist and medicinal chemists to the discovery of new antimicrobial drug candidates from marine sources.
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Saharan R, Kumar S, Khokra SL, Singh S, Tiwari A, Tiwari V, Sahoo BM, Kumar M. A Comprehensive Review on Therapeutic Potentials of Natural Cyclic Peptides. CURRENT NUTRITION & FOOD SCIENCE 2022. [DOI: 10.2174/1573401318666220114153509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
Cyclic peptides have emerged as a promising class of organic compounds that possess polypeptide chains with a cyclic ring structure. There is a circular sequence of bonds in which the ring structure is formed via linkage between one end of the peptide bond and the other end with an amide bond or any other chemically stable bonds like ether, thioether, lactone, and disulfide. Generally, the cyclic peptides are isolated from natural resources like invertebrate animals, micro-organisms of marine habitats, and higher plants. These cyclic peptides possess unique structures with diverse pharmacological activities. Now a day, cyclic peptides possess superior therapeutic value due to several reasons such as greater resistance to enzymatic degradation (in vivo) and higher bio-availability. Some of these cyclic peptides are rich in leucine, proline while some have other amino acids as their major constituents. Numerous novel cyclic peptides isolated from natural sources are successfully developed as bioactive products. Recently, cyclic peptides derived from natural resources have attracted attention for exploring their numerous beneficial effects. Moreover, it is reported that natural cyclic peptides exhibit various therapeutic activities like an anthelmintic, ACE inhibitor, anti-tumor, microtubule inhibitor, anti-fungal, anti-malarial, and platelet aggregation inhibiting activity. In this review, various cyclic peptides are reported with structures and biological activities that are isolated from various natural sources. The natural cyclic peptides possess a wide spectrum of biological activities and can become a drug of the future for replacing the existing drugs which develop resistance
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Affiliation(s)
- Renu Saharan
- Maharishi Markandeshwar Deemed to be University, Mullana, Ambala-133207, Haryana, India
| | - Suresh Kumar
- Bharat Institute of Pharmacy, Pehladpur, Babain, Kurukshetra- 136156, Haryana, India
| | - Sukhbir Lal Khokra
- Department of Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra, Haryana-136119, India
| | - Sunil Singh
- Department of Pharmaceutical Chemistry, Shri Sai College of Pharmacy, Handia, Prayagraj-136119, U.P., India
| | - Abhishek Tiwari
- Department of Pharmacy, Devsthali Vidyapeeth College of Pharmacy, Lalpur, Rudrapur (U.S. Nagar), Uttrakhand-236148, India
| | - Varsha Tiwari
- Department of Pharmacy, Devsthali Vidyapeeth College of Pharmacy, Lalpur, Rudrapur (U.S. Nagar), Uttrakhand-236148, India
| | - Biswa Mohan Sahoo
- Roland Institute of Pharmaceutical Sciences, Berhampur-760010, Odisha, India
| | - Manish Kumar
- Maharishi Markandeshwar Deemed to be University, Mullana, Ambala-133207, Haryana, India
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6
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Zhang X, Qiao J, Liu W, Qi L. l-Proline-methyl ester derivative-modulated synthesis of gold nanoclusters with promoted peroxidase-mimic activity for monitoring of ofloxacin. Analyst 2022; 147:3924-3929. [DOI: 10.1039/d2an01015a] [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
Ligands greatly affect the catalytic-properties of AuNCs-nanozymes in TMB oxidation. Adding ofloxacin enhanced the POD-mimic-activity of POMe@AuNCs upon greater ROS yield. A protocol was proposed for monitoring serum ofloxacin.
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Affiliation(s)
- Xinya Zhang
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, P. R. China
| | - Juan Qiao
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Wei Liu
- School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, P. R. China
| | - Li Qi
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
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7
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Dahiya S, Dahiya R. A comprehensive review of chemistry and pharmacological aspects of natural cyanobacterial azoline-based circular and linear oligopeptides. Eur J Med Chem 2021; 218:113406. [PMID: 33823395 DOI: 10.1016/j.ejmech.2021.113406] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 03/09/2021] [Accepted: 03/22/2021] [Indexed: 11/17/2022]
Abstract
The cyanobacterial oligopeptides are recognized for being highly selective, efficacious and relatively safer compounds with diverse bioactivities. Azoline-based natural compounds consist of heterocycles which are reduced analogues of five-membered heterocyclic azoles. Among other varieties of azoline-based natural compounds, the heteropeptides bearing oxazoline or thiazoline heterocycles possess intrinsic structural properties with captivating pharmacological profiles, representing excellent templates for the design of novel therapeutics. The specificity of heteropeptides has been translated into prominent safety, tolerability, and efficacy profiles in humans. These peptidic congeners serve as ideal intermediary between small molecules and biopharmaceuticals based on their typically low production complexity compared to the protein-based biopharmaceuticals. The distinct bioproperties and unique structures render these heteropeptides one of the most promising lead compounds for drug discovery. The high degree of chemical diversity in cyanobacterial secondary metabolites may constitute a prolific source of new entities leading to the development of new pharmaceuticals. This review focuses on the azoline-based natural oligopeptides with emphasis on distinctive structural features, stereochemical aspects, biological activities, structure activity relationship, synthetic and biosynthetic aspects as well as mode of action of cyanobacteria-derived peptides.
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Affiliation(s)
- Sunita Dahiya
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Puerto Rico, Medical Sciences Campus, San Juan, PR 00936, USA.
| | - Rajiv Dahiya
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad and Tobago, West Indies.
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8
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Dahiya R, Rampersad S, Ramnanansingh TG, Kaur K, Kaur R, Mourya R, Chennupati SV, Fairman R, Jalsa NK, Sharma A, Fuloria S, Fuloria NK. Synthesis and Bioactivity of a Cyclopolypeptide from Caribbean Marine Sponge. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2021; 19:156-170. [PMID: 33680019 PMCID: PMC7757994 DOI: 10.22037/ijpr.2020.15405.13075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Synthesis of a natural proline-rich cyclopolypeptide - rolloamide A was carried out by coupling of tri- and tetrapeptide units Boc-Phe-Pro-Val-OMe and Boc-Pro-Leu-Pro-Ile-OMe after proper deprotection at carboxyl and amino terminals using carbodiimide chemistry in alkaline environment followed by cyclization of linear heptapeptide segment in the presence of base. The structure of synthesized peptide was confirmed by spectral techniques including FTIR, 1H NMR, 13C NMR, MS analyses. Newly synthesized peptide was subjected to biological screening against pathogenic microbes and earthworms. Cyclopeptide 8 possessed promising activity against pathogenic fungi Candida albicans (ZOI: 24 mm, MIC: 6 μg/mL) and Gram-negative bacteria Pseudomonas aeruginosa (ZOI: 27 mm, MIC: 6 μg/mL) and Klebsiella pneumoniae (ZOI: 23 mm, MIC: 12.5 μg/mL), in comparison to reference drugs – griseofulvin (ZOI: 20 mm, MIC: 6 μg/mL) and ciprofloxacin (ZOI: 25 mm, MIC: 6 μg/mL/ZOI: 20 mm, MIC: 12.5 μg/mL). Also, newly synthesized heptacyclopeptide exhibited potent anthelmintic activity against earthworms Megascoplex konkanensis,Pontoscotex corethruses, and Eudrilus species (MPT/MDT ratio – 8.22-16.02/10.06-17.59 min), in comparison to standard drugs - mebendazole (MPT/MDT ratio – 10.52-18.02/12.57-19.49 min) and piperazine citrate (MPT/MDT ratio – 12.38-19.17/13.44-22.17 min).
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Affiliation(s)
- Rajiv Dahiya
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Stacy Rampersad
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Terry G Ramnanansingh
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Komalpreet Kaur
- Department of Pharmaceutical Chemistry, GHG Khalsa College of Pharmacy, Gurusar Sadhar, Ludhiana, Punjab, India
| | - Ramninder Kaur
- Department of Pharmaceutical Chemistry, GHG Khalsa College of Pharmacy, Gurusar Sadhar, Ludhiana, Punjab, India
| | - Rita Mourya
- School of Pharmacy, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Suresh V Chennupati
- Department of Pharmacy, College of Medical and Health Sciences, Wollega University, Nekemte, Ethiopia
| | - Richard Fairman
- Department of Chemistry, Faculty of Science and Technology, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Nigel K Jalsa
- Department of Chemistry, Faculty of Science and Technology, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Ajay Sharma
- Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi, India
| | - Shivkanya Fuloria
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, AIMST University, Semeling, Bedong, Kedah, Malaysia
| | - Neeraj Kumar Fuloria
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, AIMST University, Semeling, Bedong, Kedah, Malaysia
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9
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Dahiya R, Dahiya S, Shrivastava J, Fuloria NK, Gautam H, Mourya R, Fuloria S. Natural cyclic polypeptides as vital phytochemical constituents from seeds of selected medicinal plants. Arch Pharm (Weinheim) 2021; 354:e2000446. [PMID: 33522644 DOI: 10.1002/ardp.202000446] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/29/2020] [Accepted: 01/04/2021] [Indexed: 12/11/2022]
Abstract
Cyclopolypeptides are among the most predominant biomolecules in nature, especially those derived from plant seeds. This category of compounds has gained extraordinary attention due to remarkable variety of structures and valuable biofunctions. These congeners display enormous variation in terms of both structure and function and are the most significant biomolecules due to their widespread bioproperties. The estrogenic activity, immunosuppressive activity, cytotoxicity, vasorelaxant activity, and other properties possessed by cyclic peptides from seeds of plants make these congeners attractive leads for the drug discovery process. The current study covers the important structural features, structure-activity relationship, synthesis methods, and bioproperties of plant seeds-originated bioactive peptides from Vaccaria segetalis, Linum usitatissimum, and Goniothalamus leiocarpus, which may prove vital for the development of novel therapeutics based on a peptide skeleton.
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Affiliation(s)
- Rajiv Dahiya
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago, West Indies
| | - Sunita Dahiya
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico, USA
| | - Jyoti Shrivastava
- Department of Pharmaceutical Chemistry, The Oxford College of Pharmacy, Bangalore, Karnataka, India
| | - Neeraj K Fuloria
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, AIMST University, Bedong, Kedah, Malaysia
| | - Hemendra Gautam
- Department of Pharmacy Practice, Arya College of Pharmacy, Bareilly, Uttar Pradesh, India
| | - Rita Mourya
- Department of Pharmaceutical Chemistry, Lakshmi Narain College of Pharmacy, Bhopal, Madhya Pradesh, India
| | - Shivkanya Fuloria
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, AIMST University, Bedong, Kedah, Malaysia
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10
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Dahiya R, Dahiya S. Natural bioeffective cyclooligopeptides from plant seeds of Annona genus. Eur J Med Chem 2021; 214:113221. [PMID: 33540356 DOI: 10.1016/j.ejmech.2021.113221] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/04/2021] [Accepted: 01/18/2021] [Indexed: 01/16/2023]
Abstract
The Annona L. is one of the most significant genus of the Annonaceae family due to its widespread medicinal properties. This genus has a variety of active metabolites, including alkaloids, isoquinolines, peptides, acetogenins, lectins, volatile oils etc. Due to the constitution of cyclopeptides with an expanded spectrum of distinctive bioproperties, this genus is predominantly preferred over other species. The cytotoxicity, vasorelaxant activity, anti-inflammatory and other properties exhibited by cyclooligopeptides from seeds of Annona genus plants make these metabolites attractive leads for the drug discovery process. The present review covers the structural characteristics, structure activity relationship, synthesis strategies, pharmacological properties of plant seeds-originated bioactive peptides from Annona genus, which may be vital for the development of novel therapeutics based on peptide skeleton.
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Affiliation(s)
- Rajiv Dahiya
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad and Tobago, West Indies.
| | - Sunita Dahiya
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Puerto Rico, Medical Sciences Campus, San Juan, PR, 00936, USA.
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11
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Sharma D, Bisht GS. Recent Updates on Antifungal Peptides. Mini Rev Med Chem 2020; 20:260-268. [PMID: 31556857 DOI: 10.2174/1389557519666190926112423] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 07/17/2018] [Accepted: 09/06/2019] [Indexed: 12/11/2022]
Abstract
The current trend of increment in the frequency of antifungal resistance has brought research into an era where new antifungal compounds with novel mechanisms of action are required. Natural antimicrobial peptides, which are ubiquitous components of innate immunity, represent their candidature for novel antifungal peptides. Various antifungal peptides have been isolated from different species ranging from small marine organisms to insects and from various other living species. Based on these peptides, various mimetics of antifungal peptides have also been synthesized using non-natural amino acids. Utilization of these antifungal peptides is somehow limited due to their toxic and unstable nature. This review discusses recent updates and future directions of antifungal peptides, for taking them to the shelf from the bench.
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Affiliation(s)
- Deepika Sharma
- Department of Pharmacy, Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, 173234, India
| | - Gopal Singh Bisht
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, 173234, India
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12
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Dahiya R, Dahiya S, Fuloria NK, Kumar S, Mourya R, Chennupati SV, Jankie S, Gautam H, Singh S, Karan SK, Maharaj S, Fuloria S, Shrivastava J, Agarwal A, Singh S, Kishor A, Jadon G, Sharma A. Natural Bioactive Thiazole-Based Peptides from Marine Resources: Structural and Pharmacological Aspects. Mar Drugs 2020; 18:md18060329. [PMID: 32599909 PMCID: PMC7345825 DOI: 10.3390/md18060329] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 12/11/2022] Open
Abstract
Peptides are distinctive biomacromolecules that demonstrate potential cytotoxicity and diversified bioactivities against a variety of microorganisms including bacteria, mycobacteria, and fungi via their unique mechanisms of action. Among broad-ranging pharmacologically active peptides, natural marine-originated thiazole-based oligopeptides possess peculiar structural features along with a wide spectrum of exceptional and potent bioproperties. Because of their complex nature and size divergence, thiazole-based peptides (TBPs) bestow a pivotal chemical platform in drug discovery processes to generate competent scaffolds for regulating allosteric binding sites and peptide–peptide interactions. The present study dissertates on the natural reservoirs and exclusive structural components of marine-originated TBPs, with a special focus on their most pertinent pharmacological profiles, which may impart vital resources for the development of novel peptide-based therapeutic agents.
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Affiliation(s)
- Rajiv Dahiya
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago; (S.J.); (S.M.); (S.S.)
- Correspondence: (R.D.); (S.D.); Tel.: +1-868-493-5655 (R.D.); +1-787-758-2525 (ext. 5413) (S.D.)
| | - Sunita Dahiya
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Puerto Rico, Medical Sciences Campus, San Juan, PR 00936, USA
- Correspondence: (R.D.); (S.D.); Tel.: +1-868-493-5655 (R.D.); +1-787-758-2525 (ext. 5413) (S.D.)
| | - Neeraj Kumar Fuloria
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, AIMST University, Semeling, Bedong 08100, Kedah, Malaysia; (N.K.F.); (S.F.)
| | - Suresh Kumar
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra 136119, Haryana, India;
| | - Rita Mourya
- School of Pharmacy, College of Medicine and Health Sciences, University of Gondar, P.O. Box 196, Gondar 6200, Ethiopia;
| | - Suresh V. Chennupati
- Department of Pharmacy, College of Medical and Health Sciences, Wollega University, P.O. Box 395, Nekemte, Ethiopia;
| | - Satish Jankie
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago; (S.J.); (S.M.); (S.S.)
| | - Hemendra Gautam
- Arya College of Pharmacy, Dr. A.P.J. Abdul Kalam Technical University, Nawabganj, Bareilly 243407, Uttar Pardesh, India;
| | - Sunil Singh
- Department of Pharmaceutical Chemistry, Ideal Institute of Pharmacy, Wada, Palghar 421303, Maharashtra, India;
| | - Sanjay Kumar Karan
- Department of Pharmaceutical Chemistry, Seemanta Institute of Pharmaceutical Sciences, Jharpokharia, Mayurbhanj 757086, Orissa, India;
| | - Sandeep Maharaj
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago; (S.J.); (S.M.); (S.S.)
| | - Shivkanya Fuloria
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, AIMST University, Semeling, Bedong 08100, Kedah, Malaysia; (N.K.F.); (S.F.)
| | - Jyoti Shrivastava
- Department of Pharmaceutical Chemistry, The Oxford College of Pharmacy, Hongasandra, Bangalore 560068, Karnataka, India;
| | - Alka Agarwal
- Department of Pharmaceutical Chemistry, U.S. Ostwal Institute of Pharmacy, Mangalwad, Chittorgarh 313603, Rajasthan, India;
| | - Shamjeet Singh
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago; (S.J.); (S.M.); (S.S.)
| | - Awadh Kishor
- Department of Pharmaceutical Biotechnology, Shrinathji Institute of Pharmacy, Nathdwara 313301, Rajsamand, Rajasthan, India;
| | - Gunjan Jadon
- Department of Pharmaceutical Chemistry, Shrinathji Institute of Pharmacy, Nathdwara 313301, Rajsamand, Rajasthan, India;
| | - Ajay Sharma
- Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi 110017, India;
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Wang N, Xu P, Wu C, Wu R, Shou D. Preparation of micro-cell membrane chromatographic columns with polyvinyl alcohol-modified polyether ether ketone tube as cellular membrane carrier. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1104:102-108. [PMID: 30448628 DOI: 10.1016/j.jchromb.2018.11.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 11/06/2018] [Accepted: 11/08/2018] [Indexed: 12/31/2022]
Abstract
Cell membrane chromatography is a promising technique for screening active components from complex matrices. Unfortunately, the large consumption of cells and low resolutions of analytes limit the applications of this method. Herein, we report polyether ether ketone tube as a novel cellular membrane carrier for cell membrane chromatography. Its inner surface is firstly coated by polyvinyl alcohol and then cell membranes are physically adsorbed onto the polyvinyl alcohol layer. To verify this approach, osteoclast and osteoblast micro-column were prepared and characterized by calcitonin and verapamil, respectively. Comparing with common cell membrane chromatographic column, the micro-cell membrane chromatographic columns showed about 1000-fold decrease of cell consumption and satisfactory retention behavior. The developed column was applied to screen potential active components from Cortex Phellodendri Chinensis. A total of 18 components in Cortex Phellodendri Chinensis extract were observed as having retention property of osteoclast micro-cell membrane chromatographic column, while 10 components retained on osteoblast micro-cell membrane chromatographic column. The results of in vitro assay showed that berberine, obacunoic acid and phellodendrine had an obvious inhibitory effect on osteoclast differentiation and function. Berberine and tetrahydropalmatine increased the osteoblast proliferations and mineralized nodules density. This cell membrane/polyvinyl alcohol column can be applied to various biological chromatography models.
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Affiliation(s)
- Nani Wang
- Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, Zhejiang 310007, China; School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Pingcui Xu
- School of Pharmacy, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Can Wu
- Department of Chemsitry, Zhejiang University, Hangzhou 310007, China
| | - Renjie Wu
- Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, Zhejiang 310007, China
| | - Dan Shou
- Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, Zhejiang 310007, China.
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14
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Dahiya R, Kumar S, Khokra SL, Gupta SV, Sutariya VB, Bhatia D, Sharma A, Singh S, Maharaj S. Toward the Synthesis and Improved Biopotential of an N-methylated Analog of a Proline-Rich Cyclic Tetrapeptide from Marine Bacteria. Mar Drugs 2018; 16:E305. [PMID: 30200225 PMCID: PMC6163976 DOI: 10.3390/md16090305] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 08/24/2018] [Accepted: 08/27/2018] [Indexed: 12/21/2022] Open
Abstract
An N-methylated analog of a marine bacteria-derived natural proline-rich tetracyclopeptide was synthesized by coupling the deprotected dipeptide fragments Boc-l-prolyl-l-N-methylleucine-OH and l-prolyl-l-N-methylphenylalanine-OMe. A coupling reaction was accomplished utilizing N,N'-Dicyclohexylcarbodidimde (DCC) and 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC·HCl) as coupling agents and Triethylamine (TEA) or N-methylmorpholine (NMM) as the base in the presence of the racemization suppressing agent. This was followed by the cyclization of the linear tetrapeptide fragment under alkaline conditions. The structure of the synthesized cyclooligopeptide was confirmed using quantitative elemental analysis, FTIR (Fourier-transform infrared spectroscopy), ¹H NMR (Nuclear magnetic resonance spectroscopy), 13C NMR, and mass spectrometry. From the bioactivity results, it was clear that the newly synthesized proline-rich tetracyclopeptide exhibited better anthelmintic potential against Megascoplex konkanensis, Pontoscotex corethruses, and Eudrilus eugeniae at a concentration of 2 mg/mL as well as improved antifungal activity against pathogenic dermatophytes Trichophyton mentagrophytes and Microsporum audouinii at a concentration of 6 μg/mL, as compared to non-methylated tetracyclopeptide. Moreover, N-methylated tetracyclopeptide displayed significant activity against pathogenic Candida albicans.
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Affiliation(s)
- Rajiv Dahiya
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, Saint Augustine, Trinidad and Tobago.
| | - Suresh Kumar
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra 136119, Haryana, India.
| | - Sukhbir Lal Khokra
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra 136119, Haryana, India.
| | - Sheeba Varghese Gupta
- Department of Pharmaceutical Sciences, USF College of Pharmacy, University of South Florida, Tampa, FL 33612-4749, USA.
| | - Vijaykumar B Sutariya
- Department of Pharmaceutical Sciences, USF College of Pharmacy, University of South Florida, Tampa, FL 33612-4749, USA.
| | - Deepak Bhatia
- Department of Pharmacogenomics, ICPH Fairfax Bernard J. Dunn School of Pharmacy, Shenandoah University, Fairfax, VA 22031, USA.
| | - Ajay Sharma
- Department of Pharmacognosy, Amity Institute of Pharmacy, Amity University, Gwalior 474020, Madhya Pradesh, India.
| | - Shamjeet Singh
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, Saint Augustine, Trinidad and Tobago.
| | - Sandeep Maharaj
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, Saint Augustine, Trinidad and Tobago.
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15
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Abstract
Covering: 2016. Previous review: Nat. Prod. Rep., 2017, 34, 235-294This review covers the literature published in 2016 for marine natural products (MNPs), with 757 citations (643 for the period January to December 2016) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1277 in 432 papers for 2016), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
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16
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Semreen MH, El-Gamal MI, Abdin S, Alkhazraji H, Kamal L, Hammad S, El-Awady F, Waleed D, Kourbaj L. Recent updates of marine antimicrobial peptides. Saudi Pharm J 2018; 26:396-409. [PMID: 29556131 PMCID: PMC5856950 DOI: 10.1016/j.jsps.2018.01.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 01/03/2018] [Indexed: 01/29/2023] Open
Abstract
Antimicrobial peptides are group of proteins showing broad-spectrum antimicrobial activity that have been known to be powerful agents against a variety of pathogens. This class of compounds contributed to solving the microbial resistance dilemma that limited the use of many potent antimicrobial agents. The marine environment is known to be one of the richest sources for antimicrobial peptides, yet this environment is not fully explored. Hence, the scientific research attention should be directed toward the marine ecosystem as enormous amount of useful discoveries could be brought to the forefront. In the current article, the marine antimicrobial peptides reported from mid 2012 to 2017 have been reviewed.
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Affiliation(s)
- Mohammad H Semreen
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Mohammed I El-Gamal
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates.,Department of Medicinal Chemistry, Faculty of Pharmacy, University of Mansoura, Mansoura 35516, Egypt
| | - Shifaa Abdin
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Hajar Alkhazraji
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Leena Kamal
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Saba Hammad
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Faten El-Awady
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Dima Waleed
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Layal Kourbaj
- College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
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17
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Kumar S, Dahiya R, Khokra SL, Mourya R, Chennupati SV, Maharaj S. Total Synthesis and Pharmacological Investigation of Cordyheptapeptide A. Molecules 2017; 22:E682. [PMID: 28554994 PMCID: PMC6152760 DOI: 10.3390/molecules22060682] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/17/2017] [Accepted: 04/18/2017] [Indexed: 12/24/2022] Open
Abstract
The present investigation reports the synthesis of a phenylalanine-rich N-methylated cyclopeptide, cordyheptapeptide A (8), previously isolated from the insect pathogenic fungus Cordyceps sp. BCC 1788, accomplished through the coupling of N-methylated tetrapeptide and tripeptide fragments followed by cyclization of the linear heptapeptide unit. Structure elucidation of the newly synthesized cyclopolypeptide was performed by means of FT-IR, ¹H-NMR, 13C-NMR, and fast atom bombardment mass spectrometry (FABMS), and screened for its antibacterial, antidermatophytic, and cytotoxic potential. According to the antimicrobial activity results, the newly synthesized N-Methylated cyclopeptide exhibited potent antibacterial activity against Gram-negative bacteria Pseudomonas aeruginosa and Klebsiella pneumoniae and antifungal activity against dermatophytes Trichophyton mentagrophytes and Microsporum audouinii at a concentration of 6 μg/mL, in comparison to the reference drugs, gatifloxacin and griseofulvin. In addition, cyclopolypeptide 8 displayed suitable levels of cytotoxicity against Dalton's lymphoma ascites (DLA) and Ehrlich's ascites carcinoma (EAC) cell lines.
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Affiliation(s)
- Suresh Kumar
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra 136119, Haryana, India.
| | - Rajiv Dahiya
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago, West Indies.
| | - Sukhbir Lal Khokra
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra 136119, Haryana, India.
| | - Rita Mourya
- School of Pharmacy, College of Medicine and Health Sciences, University of Gondar, P.O. Box 196, Gondar 6200, Ethiopia.
| | - Suresh V Chennupati
- Department of Pharmacy, College of Medical and Health Sciences, Wollega University, P.O. Box 395, Nekemte, Ethiopia.
| | - Sandeep Maharaj
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago, West Indies.
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18
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Dahiya R, Singh S. Toward the Synthesis and Pharmacological Screening of a Natural Cycloheptapeptide of Plant Origin. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The solution-phase synthesis of a proline and glycine-rich plant-derived cyclic heptapeptide, gypsophin E (8), is reported via coupling of a tetrapeptide unit Glycyl-L-leucyl-L-valyl-L-proline-OMe with a tripeptide unit Boc-L-isoleucyl-glycyl-L-proline-OH, followed by cyclization of the linear fragment having seven amino acid units. The structure of the newly synthesized cycloheptapeptide was confirmed by means of chemical and spectroscopic methods. The newly synthesized cyclopolypeptide displayed potent antifungal and anthelmintic activities against the pathogenic yeast Candida albicans, the dermatophytes Trichophyton mentagrophytes and Microsporum audouinii at the 6 μg/mL level, and the earthworms Megascoplex konkanensis, Pontoscotex corethruses and Eudrilus eugeniea at a concentration of 2 mg/mL.
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Affiliation(s)
- Rajiv Dahiya
- Laboratory of Peptide Research and Development, School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago, West Indies
| | - Sunil Singh
- Research Scholar, Department of Pharmacy, Mewar University, Gangrar, Chittorgarh, Rajasthan, India
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19
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Dahiya R, Singh S. Synthesis, Characterization, and Biological Activity Studies on Fanlizhicyclopeptide A. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2017; 16:1176-1184. [PMID: 29201105 PMCID: PMC5610772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The synthesis of a proline-rich cyclic heptapeptide, fanlizhicyclopeptide A (8), previously isolated from the fruits of Annona squamosa (sugar-apples), is described via coupling of tetrapeptide -prolyl--tyrosyl--leucyl--proline methyl ester with tripeptide Boc-glycyl--valyl--proline followed by cyclization of the linear fragment having seven amino acid units. Structure of the synthesized cyclooligopeptide was confirmed by the means of chemical and spectroscopic methods including FTIR, 1H NMR, 13C NMR, FABMS and further, subjected to the anthelmintic, antibacterial and the antifungal activity studies. Bioactivity results indicated that the newly synthesized cyclic peptide displayed potent anthelmintic activity against the three earthworm species Megascoplex konkanensis, Pontoscotex corethruses and Eudrilus eugeniae at 2 mg/mL and remarkable anti-dermatophytic activities against Trichophyton mentagrophytes and Microsporum audouinii at concentration of 6 µg/mL.
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Affiliation(s)
- Rajiv Dahiya
- Laboratory of Peptide Research and Development,School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago, West Indies.,Corresponding author: E-mail:
| | - Sunil Singh
- Research Scholar, Department of Pharmacy, Mewar University, Gangrar, Chittorgarh, Rajasthan, India.
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