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Si Y, Zhu J, Xu X, Xu Y, Lee J, Park YD. Diphenolic boldine, an aporphine alkaloid: inhibitory effect evaluation on α-glucosidase by molecular dynamics integrating enzyme kinetics. J Biomol Struct Dyn 2024:1-13. [PMID: 38189319 DOI: 10.1080/07391102.2024.2301769] [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: 03/29/2023] [Accepted: 12/30/2023] [Indexed: 01/09/2024]
Abstract
Screening α-glucosidase inhibitors with novel structures is an important field in the development of anti-diabetic drugs due to their application in postprandial hyperglycemia control. Boldine is one of the potent natural antioxidants with a wide range of pharmacological activities. Virtual screening and biochemical inhibition kinetics combined with molecular dynamics simulations were conducted to verify the inactivation function of boldine on α-glucosidase. A series of inhibition kinetics and spectrometry detections were conducted to analyze the α-glucosidase inhibition. Computational simulations of molecular dynamics/docking analyses were conducted to detect boldine docking sites' details and evaluate the key binding residues. Boldine displayed a typical reversible and mixed-type inhibition manner. Measurements of circular dichroism and fluorescence spectrum showed boldine changed the secondary structure and loosened the tertiary conformation of target α-glucosidase. The computational molecular dynamics showed that boldine could block the active pocket site through close interaction with binding key residues, and two phenolic hydroxyl groups of boldine play a core function in α-glucosidase inhibition via ligand binding. This investigation reveals the boldine function on interaction with the α-glucosidase active site, which provides a new inhibitor candidate.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Yuexiu Si
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, P.R. China
- Key Labortary of Blood-Stasis-Toxin Syndrome of Zhejiang Province, Hangzhou, P.R. China
| | - Jiabo Zhu
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, P.R. China
| | - Xia Xu
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, P.R. China
| | - Yueyuan Xu
- School of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, P.R. China
| | - Jinhyuk Lee
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea
- Department of Bioinformatics, KRIBB School of Bioscience, University of Science and Technology (UST), Daejeon, Korea
| | - Yong-Doo Park
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, P.R. China
- Skin Diseases Research Center, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, P.R. China
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, P.R. China
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Atpadkar PP, Gopavaram S, Chaudhary S. Natural-product-inspired bioactive alkaloids agglomerated with potential antioxidant activity: Recent advancements on structure-activity relationship studies and future perspectives. VITAMINS AND HORMONES 2023; 121:355-393. [PMID: 36707140 DOI: 10.1016/bs.vh.2022.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Alkaloids derived from natural sources have been shown to have substantial antioxidant activity, suggesting that these natural-product-inspired bioactive entities may have major beneficial influence on human health and food processing sector. The primary process intricates in the etiology of several disorders such as neurodegenerative, inflammatory cardiovascular, and other chronic diseases appear to be either oxidative injury or a cellular damage caused by reactive oxygen species (ROS) or free-radicals. The alkaloid class of bio-heterocycles have been divided into numerous groups based on their biosynthetic precursor and heterocyclic ring systems i.e., piperidine, imidazole, purine, pyrrolizidine, indole, quinolozidine, isoquinoline, tropane, and pyrrolidine alkaloids. Distinct biological properties have been attributed to various compounds belonging to this chemical groups, including antirheumatic, cardiovascular, antispasmodic, anti-ulcer, anti-inflammatory, antibacterial, antinociceptive etc. For many years, natural products and their analogs have been recognized as a possible source of medicinal agents. Recently, research has been concentrated on the synthesis, separation/purification, and identification of new alkaloids derived from a variety of natural sources. This book chapter aims to summarize on the latest developments on the current knowledge on the relationship between the structural features of promising class of bioactive alkaloids with their antioxidant activities.
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Affiliation(s)
- Pooja Prakash Atpadkar
- Laboratory of Bioactive heterocycles and Catalysis (BHC Lab), Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Lucknow, UP, India
| | - Sumanth Gopavaram
- Laboratory of Bioactive heterocycles and Catalysis (BHC Lab), Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Lucknow, UP, India
| | - Sandeep Chaudhary
- Laboratory of Bioactive heterocycles and Catalysis (BHC Lab), Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Lucknow, UP, India; Laboratory of Organic and Medicinal Chemistry (OMC Lab), Department of Chemistry, Malaviya National Institute of Technology, Jaipur, India.
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Silva LCL, de Souza GH, Pateis VDO, Ames-Sibin AP, Silva BP, Bracht L, Comar JF, Peralta RM, Bracht A, Sá-Nakanishi AB. Inhibition of Gluconeogenesis by Boldine in the Perfused Liver: Therapeutical Implication for Glycemic Control. Int J Hepatol 2023; 2023:1283716. [PMID: 37056327 PMCID: PMC10089784 DOI: 10.1155/2023/1283716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/03/2023] [Accepted: 03/14/2023] [Indexed: 04/15/2023] Open
Abstract
The alkaloid boldine occurs in the Chilean boldo tree (Peumus boldus). It acts as a free radical scavenger and controls glycemia in diabetic rats. Various mechanisms have been proposed for this effect, including inhibited glucose absorption, stimulated insulin secretion, and increased expression of genes involved in glycemic control. Direct effects on glucose synthesis and degradation were not yet measured. To fill this gap, the present study is aimed at ensuring several metabolic pathways linked to glucose metabolism (e.g., gluconeogenesis) in the isolated perfused rat liver. In order to address mechanistic issues, energy transduction in isolated mitochondria and activities of gluconeogenic key enzymes in tissue preparations were also measured. Boldine diminished mitochondrial ROS generation, with no effect on energy transduction in isolated mitochondria. It inhibited, however, at least three enzymes of the gluconeogenic pathway, namely, phosphoenolpyruvate carboxykinase, fructose-bisphosphatase-1, and glucose 6-phosphatase, starting at concentrations below 50 μM. Consistently, in the perfused liver, boldine decreased lactate-, alanine-, and fructose-driven gluconeogenesis with IC50 values of 71.9, 85.2, and 83.6 μM, respectively. Conversely, the compound also increased glycolysis from glycogen-derived glucosyl units. The hepatic ATP content was not affected by boldine. It is proposed that the direct inhibition of hepatic gluconeogenesis by boldine, combined with the increase of glycolysis, could be an important event behind the diminished hyperglycemia observed in boldine-treated diabetic rats.
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Affiliation(s)
- Laís Cristina Lima Silva
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
| | - Gustavo Henrique de Souza
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
| | - Vanesa de Oliveira Pateis
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
| | - Ana Paula Ames-Sibin
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
| | - Beatriz Paes Silva
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
| | - Lívia Bracht
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
| | - Jurandir Fernando Comar
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
| | - Rosane Marina Peralta
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
| | - Adelar Bracht
- Department of Biochemistry, Labor of Hepatic Metabolism, State University of Maringá, Maringá, PR, Brazil
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GC-MS Analysis of Bioactive Compounds in Methanolic Extracts of Papaver decaisnei and Determination of Its Antioxidants and Anticancer Activities. J FOOD QUALITY 2022. [DOI: 10.1155/2022/1405157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The Papaver L. plant (Papaver decaisnei) has ethnobotanical records in many countries including Iraqi Kurdistan. The current study investigates the methanol (99.9%) extracts (10 μg/mL) of roots, leaves, and flowers of Papaver decaisnei in terms of phytochemistry by gas chromatography-mass spectrophotometry GC-MS, in vitro antioxidant activity by radical scavenging and reducing power assays, and finally, the anticancer actions as IC50 (inhibitory concentration at 50%) against human colorectal adenocarcinoma (Caco-2), mammary cancer cells (MCF-7), and human cervical carcinoma (HeLa) cells. The results showed 22, 19, and 17 chemicals for roots, leaves, and flowers of P. decaisnei, respectively. The prevalent organic compounds of P. decaisnei were alkaloids (62.03%), phenolics (55.43%), fatty acids (42.51%), esters (32.08%), terpenoids (25.59%), and phytosterols (15.68%), namely, roemerine (70.44%), 9,12,15-octadecatrien-1-ol (37.45%), hexadecanoic acid (33.72%), decarbomethoxytabersonine (24.49%), and γ-sitosterol (11.22%). The antioxidant activity of plant organs was within 39.1–143.5 μg/mL for DPPH, 135.4–276.4 μg/mL for ABTS, 12.4–34.3 μg/mL for FRAP, and 42.6–75.8 μg/mL for CUPRAC assays. The anticancer of P. decaisnei was found as 125.3–388.4 μg/mL against all tested cell lines (Caco-2, MCF-7, and HeLa). The detected alkaloids and bioactivity of P. decaisnei encourage future isolation of those remarkable alkaloids (reomerine) for potential usage in the pharmaceutical industry.
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Ali G, Cuny GD. 8-, 9-, and 11-Aryloxy Dimeric Aporphines and Their Pharmacological Activities. Molecules 2021; 26:4521. [PMID: 34361671 PMCID: PMC8347945 DOI: 10.3390/molecules26154521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/20/2021] [Accepted: 07/20/2021] [Indexed: 11/16/2022] Open
Abstract
Aporphines, a major group of aporphinoid alkaloids, exhibit interesting and diverse pharmacological activities. A set of dimeric aporphines with an aryloxy group at C8, C9, and C11 have been isolated from six genera and shown to elicit various biological activities such as antitumor, antimalarial, antimicrobial, antiplatelet aggregation, antifibrotic, immunosuppressive, and vasorelaxant properties. In this review, the nomenclature, chemical structures, botanical sources, pharmacological activities, and synthetic approaches of this set of dimeric alkaloids are presented.
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Affiliation(s)
- Ghada Ali
- Department of Chemistry, College of Natural Sciences and Mathematics, University of Houston, Houston, TX 77204, USA;
| | - Gregory D. Cuny
- Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX 77204, USA
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CERMANOVA J, PRASNICKA A, DOLEZELOVA E, ROZKYDALOVA L, HROCH M, CHLÁDEK J, TOMSIK P, KLOETING I, MICUDA S. Pharmacokinetics of Boldine in Control and Mrp2-Deficient Rats. Physiol Res 2016; 65:S489-S497. [DOI: 10.33549/physiolres.933520] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The aim of the present study was to describe the currently poorly understood pharmacokinetics (PK) of boldine in control rats (LW, Lewis rats), and Mrp2 transporter-deficient rats (TR-). Animals from the LW and TR- groups underwent a bolus dose study with 10 mg/kg of boldine applied either orally or intravenously in order to evaluate the major PK parameters. The TR- rats demonstrated significantly reduced total clearance with prolonged biological half-life (LW 12±4.6 versus TR- 20±4.4 min), decreased volume of distribution (LW 3.2±0.4 l/kg versus TR- 2.4±0.4 l/kg) and reduced bioavailability (LW 7 % versus TR- 4.5 %). Another set of LW and TR- rats were used for a clearance study with continuous intravenous administration of boldine. The LW rats showed that biliary and renal clearance formed less than 2 % of the total clearance of boldine. The treatment of samples with β glucuronidase showed at least a 38 % contribution of conjugation reactions to the overall clearance of boldine. The TR- rats demonstrated reduced biliary clearance of boldine and its conjugates, which was partly compensated by their increased renal clearance. In conclusion, this study presents the PK parameters of boldine and shows the importance of the Mrp2 transporter and conjugation reactions in the elimination of the compound.
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Affiliation(s)
| | | | | | | | | | | | | | | | - S. MICUDA
- Department of Pharmacology, Faculty of Medicine, Charles University, Hradec Kralove, Czech Republic
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