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Ajiboye AT, Asekun OT, Ayipo YO, Mordi MN, Familoni OB, Ali Z, Khan IA. Phytochemicals and enzymes inhibitory potentials of leaves and rootbarks of Sarcocephallus latifolius (smith): In vitro and in silico investigations. Fitoterapia 2024; 176:106037. [PMID: 38801897 DOI: 10.1016/j.fitote.2024.106037] [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: 02/05/2024] [Revised: 05/17/2024] [Accepted: 05/24/2024] [Indexed: 05/29/2024]
Abstract
In this study, bioactive compounds were isolated and characterized from the leaves and root-barks extracts of S.latifolius, with subsequent in vitro experimental investigations for antihyperglycemic potentials on α-amylase and α-glucosidase enzymes. Thirteen bioactive compounds were identified, including 10-Hydroxystrictosamide (2) and Quinovic acid-3-O-α-L-rhamnosyl-28-O-β-d-glucopyranosyl ester (8), using chromatographic, nuclear magnetic resonance spectroscopy (NMR), and mass spectrometry (MS) techniques. Experimental assays revealed that compounds 1-4 exhibited potent inhibition of α-amylase and α-glucosidase, with compound 2 demonstrating the most potent α-amylase inhibition (IC50 value of 0.52 ± 0.003 μg/mL). Compound 8 showed a lower IC50 value (0.098 ± 0.016 μg/mL) against α-glucosidase compared to compound 2 and acarbose. Synergistic effects among the compounds could enhance their inhibitory actions on the enzymes, positioning them as potential anti-hyperglycemia agents. Compound 2 displayed the highest binding affinity (-7.970 kcal/mol) when docked against α-amylase (PDB ID: 2QV4), comparable to acarbose (-8.515 kcal/mol). It also ranked among the top ligands against α-glucosidase (PDB ID 3TOP), although compound 13 and acarbose had higher docking scores. All compounds exhibited ideal ADMET properties, suggesting good bioavailability and low toxicity. In conclusion, the isolated compounds exhibit promising antihyperglycemic potential and favourable safety profiles for further exploration.
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Affiliation(s)
- Abdulfatai Temitope Ajiboye
- Department of Chemistry and Industrial Chemistry, Faculty of Pure and Applied Sciences, PMB 1530, Kwara State University, Malete, Nigeria; Department of Chemistry, Faculty of Science, University of Lagos, Nigeria; National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, United States.
| | | | - Yusuf Oloruntoyin Ayipo
- Department of Chemistry and Industrial Chemistry, Faculty of Pure and Applied Sciences, PMB 1530, Kwara State University, Malete, Nigeria; Centre for Drug Research, Universiti Sains Malaysia, USM, 11800, Pulau Pinang, Malaysia
| | - Mohd Nizam Mordi
- Centre for Drug Research, Universiti Sains Malaysia, USM, 11800, Pulau Pinang, Malaysia
| | | | - Zulfiqar Ali
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, United States
| | - Ikhlas A Khan
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, United States
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Umer SM, Solangi M, Khan KM, Saleem RSZ. Indole-Containing Natural Products 2019-2022: Isolations, Reappraisals, Syntheses, and Biological Activities. Molecules 2022; 27:7586. [PMID: 36364413 PMCID: PMC9655573 DOI: 10.3390/molecules27217586] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/28/2022] [Accepted: 11/02/2022] [Indexed: 07/30/2023] Open
Abstract
Indole alkaloids represent a large subset of natural products, with more than 4100 known compounds. The majority of these alkaloids are biologically active, with some exhibiting excellent antitumor, antibacterial, antiviral, antifungal, and antiplasmodial activities. Consequently, the natural products of this class have attracted considerable attention as potential leads for novel therapeutics and are routinely isolated, characterized, and profiled to gauge their biological potential. However, data on indole alkaloids, their various structures, and bioactivities are complex due to their diverse sources, such as plants, fungi, bacteria, sponges, tunicates, and bryozoans; thus, isolation methods produce an incredible trove of information. The situation is exacerbated when synthetic derivatives, as well as their structures, bioactivities, and synthetic schemes, are considered. Thus, to make such data comprehensive and inform researchers about the current field's state, this review summarizes recent reports on novel indole alkaloids. It deals with the isolation and characterization of 250 novel indole alkaloids, a reappraisal of previously reported compounds, and total syntheses of indole alkaloids. In addition, several syntheses and semi-syntheses of indole-containing derivatives and their bioactivities are reported between January 2019 and July 2022.
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Affiliation(s)
- Syed Muhammad Umer
- Department of Chemistry and Chemical Engineering, SBASSE, Lahore University of Management Sciences, Sector-U, DHA, Lahore 54792, Pakistan
| | - Mehwish Solangi
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Khalid Mohammed Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
- Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 31441, Dammam 31441, Saudi Arabia
| | - Rahman Shah Zaib Saleem
- Department of Chemistry and Chemical Engineering, SBASSE, Lahore University of Management Sciences, Sector-U, DHA, Lahore 54792, Pakistan
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Sakamoto J, Ishikawa H. Bioinspired Transformations Using Strictosidine Aglycones: Divergent Total Syntheses of Monoterpenoid Indole Alkaloids in the Early Stage of Biosynthesis. Chemistry 2021; 28:e202104052. [PMID: 34854134 DOI: 10.1002/chem.202104052] [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: 11/10/2021] [Indexed: 11/11/2022]
Abstract
A series of bioinspired transformations that are applied to convert strictosidine aglycones into monoterpenoid indole alkaloids is reported. The highly reactive key intermediates, strictosidine aglycones, were prepared in situ by simple removal of a silyl protecting group from the silyl ether derivatives, and converted selectively via bioinspired transformations under substrate control into heteroyohimbine- and corynantheine-type, and akagerine and naucleaoral related alkaloids. Thus, concise, divergent total syntheses of 13 monoterpenoid indole alkaloids, (-)-cathenamine, (-)-tetrahydroalstonine, (+)-dihydrocorynantheine, (-)-corynantheidine, (-)-akagerine, (-)-dihydrocycloakagerine, (-)-naucleaoral B, (+)-naucleidinal, (-)-naucleofficines D and III, (-)-nauclefiline, and (-)-naucleamides A and E, were accomplished in fewer than 13 steps.
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Affiliation(s)
- Jukiya Sakamoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Hayato Ishikawa
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan
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Yan Y, Li X, Zhang C, Lv L, Gao B, Li M. Research Progress on Antibacterial Activities and Mechanisms of Natural Alkaloids: A Review. Antibiotics (Basel) 2021; 10:antibiotics10030318. [PMID: 33808601 PMCID: PMC8003525 DOI: 10.3390/antibiotics10030318] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 12/29/2022] Open
Abstract
Alkaloids are nitrogen-containing heterocyclic compounds typically isolated from plants. They represent one of the most important types of natural products because of their large number and structural diversity and complexity. Based on their chemical core structures, alkaloids are classified as isoquinolines, quinolines, indoles, piperidine alkaloids, etc. In-depth analyses of alkaloids have revealed their antibacterial activities. To date, due to the widespread use of antibiotics, the problem of drug-resistant bacterial infections has been gradually increasing, which severely affects the clinical efficacy of antibacterial therapies and patient safety. Therefore, significant research efforts are focused on alkaloids because they represent a potentially new type of natural antibiotic with a wide antibacterial spectrum, rare adverse reactions, and a low tendency to produce drug resistance. Their main antibacterial mechanisms include inhibition of bacterial cell wall synthesis, change in cell membrane permeability, inhibition of bacterial metabolism, and inhibition of nucleic acid and protein synthesis. This article reviews recent reports about the chemical structures and the antibacterial activities and mechanisms of alkaloids. The purpose is to solve the problem of bacterial resistance and to provide a certain theoretical basis and research ideas for the development of new antibacterial drugs.
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Affiliation(s)
- Yumei Yan
- Department of Pharmacy, Baotou Medical College, Baotou 014040, China; (Y.Y.); (X.L.); (C.Z.)
| | - Xing Li
- Department of Pharmacy, Baotou Medical College, Baotou 014040, China; (Y.Y.); (X.L.); (C.Z.)
| | - Chunhong Zhang
- Department of Pharmacy, Baotou Medical College, Baotou 014040, China; (Y.Y.); (X.L.); (C.Z.)
- Inner Mongolia Key Laboratory of Characteristic Geoherbs Resources Protection and Utilization, Baotou Medical College, Baotou 014040, China
- Inner Mongolia Engineering Research Center of the Planting and Development of Astragalus Membranaceus of the Geoherbs, Baotou Medical College, Baotou 014040, China
| | - Lijuan Lv
- Department of Basic Science, Tianjin Agricultural University, Tianjin 300384, China;
| | - Bing Gao
- Department of Pharmacy, Baotou Medical College, Baotou 014040, China; (Y.Y.); (X.L.); (C.Z.)
- Correspondence: (B.G.); (M.L.)
| | - Minhui Li
- Department of Pharmacy, Baotou Medical College, Baotou 014040, China; (Y.Y.); (X.L.); (C.Z.)
- Inner Mongolia Key Laboratory of Characteristic Geoherbs Resources Protection and Utilization, Baotou Medical College, Baotou 014040, China
- Inner Mongolia Engineering Research Center of the Planting and Development of Astragalus Membranaceus of the Geoherbs, Baotou Medical College, Baotou 014040, China
- Pharmaceutical Laboratory, Inner Mongolia Institute of Traditional Chinese Medicine, Hohhot 010020, China
- Correspondence: (B.G.); (M.L.)
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Liu Y, Cui Y, Lu L, Gong Y, Han W, Piao G. Natural indole-containing alkaloids and their antibacterial activities. Arch Pharm (Weinheim) 2020; 353:e2000120. [PMID: 32557757 DOI: 10.1002/ardp.202000120] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 12/13/2022]
Abstract
As the growth in resistance to bacterial infection treatments poses a grave threat to global health in the 21st century, there is a constant need to explore novel antibacterial agents that have the ability to overcome drug resistance. Indole-containing alkaloids are widely distributed in nature, and a variety of indole-containing alkaloids have already been applied in clinical practice, proving that indole-containing alkaloids are fascinating and privileged scaffolds for the development of novel drugs. Moreover, indole-containing alkaloids could exert their antibacterial activity through the inhibition of efflux pumps, the biofilm, filamentous temperature-sensitive protein Z, and methicillin-resistant Staphylococcus aureus pyruvate kinase; so, indole-containing alkaloids constitute an important source of novel antibacterial agents. This review is an endeavor to highlight the advances in the development of indole-containing alkaloids with antibacterial potential, covering articles published in the recent 10 years.
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Affiliation(s)
- Yang Liu
- The Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, China
| | - Ying Cui
- Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang, China
| | - Liyan Lu
- The Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, China
| | - Yufeng Gong
- The Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, China
| | - Wen Han
- The Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, China
| | - Guishun Piao
- The Second Affiliated Hospital of Mudanjiang Medical University, Mudanjiang, China
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Chen L, He J. DABCO-Catalyzed Michael/Alkylation Cascade Reactions Involving α-Substituted Ammonium Ylides for the Construction of Spirocyclopropyl Oxindoles: Access to the Powerful Chemical Leads against HIV-1. J Org Chem 2020; 85:5203-5219. [DOI: 10.1021/acs.joc.9b03164] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lin Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China
| | - Jin He
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China
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