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Sciacca C, Cardullo N, Pulvirenti L, Travagliante G, D'Urso A, D'Agata R, Peri E, Cancemi P, Cornu A, Deffieux D, Pouységu L, Quideau S, Muccilli V. Synthesis of obovatol and related neolignan analogues as α-glucosidase and α-amylase inhibitors. Bioorg Chem 2024; 147:107392. [PMID: 38723423 DOI: 10.1016/j.bioorg.2024.107392] [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: 12/08/2023] [Revised: 04/12/2024] [Accepted: 04/21/2024] [Indexed: 05/18/2024]
Abstract
Diabetes mellitus is a metabolic disease characterized by hyperglycemia, which can be counteracted by the inhibition of α-glucosidase (α-Glu) and α-amylase (α-Amy), enzymes responsible for the hydrolysis of carbohydrates. In recent decades, many natural compounds and their bioinspired analogues have been studied as α-Glu and α-Amy inhibitors. However, no studies have been devoted to the evaluation of α-Glu and α-Amy inhibition by the neolignan obovatol (1). In this work, we report the synthesis of 1 and a library of new analogues. The synthesis of these compounds was achieved by implementing methodologies based on: phenol allylation, Claisen/Cope rearrangements, methylation, Ullmann coupling, demethylation, phenol oxidation and Michael-type addition. Obovatol (1) and ten analogues were evaluated for their in vitro inhibitory activity towards α-Glu and α-Amy. Our investigation highlighted that the naturally occurring 1 and four neolignan analogues (11, 22, 26 and 27) were more effective inhibitors than the hypoglycemic drug acarbose (α-Amy: 34.6 µM; α-Glu: 248.3 µM) with IC5O value of 6.2-23.6 µM toward α-Amy and 39.8-124.6 µM toward α-Glu. Docking investigations validated the inhibition outcomes, highlighting optimal compatibility between synthesized neolignans and both the enzymes. Concurrently circular dichroism spectroscopy detected the conformational changes in α-Glu induced by its interaction with the studied neolignans. Detailed studies through fluorescence measurements and kinetics of α-Glu and α-Amy inhibition also indicated that 1, 11, 22, 26 and 27 have the greatest affinity for α-Glu and 1, 11 and 27 for α-Amy. Surface plasmon resonance imaging (SPRI) measurements confirmed that among the compounds studied, the neolignan 27 has the greater affinity for both enzymes, thus corroborating the results obtained by kinetics and fluorescence quenching. Finally, in vitro cytotoxicity of the investigated compounds was tested on human colon cancer cell line (HCT-116). All these results demonstrate that these obovatol-based neolignan analogues constitute promising candidates in the pursuit of developing novel hypoglycemic drugs.
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Affiliation(s)
- Claudia Sciacca
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Nunzio Cardullo
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Luana Pulvirenti
- CNR-ICB, Consiglio Nazionale delle Ricerche-Istituto di Chimica Biomolecolare, via Paolo Gaifami 18, Catania 95126, Italy
| | - Gabriele Travagliante
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Alessandro D'Urso
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Roberta D'Agata
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
| | - Emanuela Peri
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Palermo 90128, Italy
| | - Patrizia Cancemi
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Palermo 90128, Italy
| | - Anaëlle Cornu
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération, Talence Cedex, France
| | - Denis Deffieux
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération, Talence Cedex, France
| | - Laurent Pouységu
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération, Talence Cedex, France
| | - Stéphane Quideau
- Univ. Bordeaux, ISM (CNRS-UMR 5255), 351 cours de la Libération, Talence Cedex, France; Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 05, France.
| | - Vera Muccilli
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy.
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2
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Grossi G, Scarano N, Musumeci F, Tonelli M, Kanov E, Carbone A, Fossa P, Gainetdinov RR, Cichero E, Schenone S. Discovery of a Novel Chemo-Type for TAAR1 Agonism via Molecular Modeling. Molecules 2024; 29:1739. [PMID: 38675561 PMCID: PMC11052455 DOI: 10.3390/molecules29081739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 03/27/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
The search for novel effective TAAR1 ligands continues to draw great attention due to the wide range of pharmacological applications related to TAAR1 targeting. Herein, molecular docking studies of known TAAR1 ligands, characterized by an oxazoline core, have been performed in order to identify novel promising chemo-types for the discovery of more active TAAR1 agonists. In particular, the oxazoline-based compound S18616 has been taken as a reference compound for the computational study, leading to the development of quite flat and conformationally locked ligands. The choice of a "Y-shape" conformation was suggested for the design of TAAR1 ligands, interacting with the protein cavity delimited by ASP103 and aromatic residues such as PHE186, PHE195, PHE268, and PHE267. The obtained results allowed us to preliminary in silico screen an in-house series of pyrimidinone-benzimidazoles (1a-10a) as a novel scaffold to target TAAR1. Combined ligand-based (LBCM) and structure based (SBCM) computational methods suggested the biological evaluation of compounds 1a-10a, leading to the identification of derivatives 1a-3a (hTAAR1 EC50 = 526.3-657.4 nM) as promising novel TAAR1 agonists.
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Affiliation(s)
- Giancarlo Grossi
- Department of Pharmacy, Section of Medicinal Chemistry, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy; (G.G.); (N.S.); (F.M.); (M.T.); (A.C.); (P.F.); (S.S.)
| | - Naomi Scarano
- Department of Pharmacy, Section of Medicinal Chemistry, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy; (G.G.); (N.S.); (F.M.); (M.T.); (A.C.); (P.F.); (S.S.)
| | - Francesca Musumeci
- Department of Pharmacy, Section of Medicinal Chemistry, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy; (G.G.); (N.S.); (F.M.); (M.T.); (A.C.); (P.F.); (S.S.)
| | - Michele Tonelli
- Department of Pharmacy, Section of Medicinal Chemistry, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy; (G.G.); (N.S.); (F.M.); (M.T.); (A.C.); (P.F.); (S.S.)
| | - Evgeny Kanov
- Institute of Translational Biomedicine, St. Petersburg State University, 199034 St. Petersburg, Russia (R.R.G.)
- St. Petersburg University Hospital, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Anna Carbone
- Department of Pharmacy, Section of Medicinal Chemistry, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy; (G.G.); (N.S.); (F.M.); (M.T.); (A.C.); (P.F.); (S.S.)
| | - Paola Fossa
- Department of Pharmacy, Section of Medicinal Chemistry, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy; (G.G.); (N.S.); (F.M.); (M.T.); (A.C.); (P.F.); (S.S.)
| | - Raul R. Gainetdinov
- Institute of Translational Biomedicine, St. Petersburg State University, 199034 St. Petersburg, Russia (R.R.G.)
- St. Petersburg University Hospital, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Elena Cichero
- Department of Pharmacy, Section of Medicinal Chemistry, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy; (G.G.); (N.S.); (F.M.); (M.T.); (A.C.); (P.F.); (S.S.)
| | - Silvia Schenone
- Department of Pharmacy, Section of Medicinal Chemistry, School of Medical and Pharmaceutical Sciences, University of Genoa, Viale Benedetto XV, 3, 16132 Genoa, Italy; (G.G.); (N.S.); (F.M.); (M.T.); (A.C.); (P.F.); (S.S.)
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Khalili Ghomi M, Noori M, Mirahmad M, Iraji A, Sadr AS, Dastyafteh N, Asili P, Gholami M, Javanshir S, Lotfi M, Mojtabavi S, Faramarzi MA, Asadi M, Nasli-Esfahani E, Palimi M, Larijani B, Meshkatalsadat MH, Mahdavi M. Evaluation of novel 2-(quinoline-2-ylthio)acetamide derivatives linked to diphenyl-imidazole as α-glucosidase inhibitors: Insights from in silico, in vitro, and in vivo studies on their anti-diabetic properties. Eur J Med Chem 2024; 269:116332. [PMID: 38508120 DOI: 10.1016/j.ejmech.2024.116332] [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: 07/28/2023] [Revised: 03/05/2024] [Accepted: 03/13/2024] [Indexed: 03/22/2024]
Abstract
The inhibition of the α-glucosidase enzyme is crucial for targeting type 2 diabetes mellitus (DM). This study introduces a series of synthetic analogs based on thiomethylacetamide-quinoline derivatives linked to diphenyl-imidazole as highly potential α-glucosidase inhibitors. Twenty derivatives were synthesized and screened in vitro against α-glucosidase, revealing IC50 values ranging from 0.18 ± 0.00 to 2.10 ± 0.07 μM, in comparison to the positive control, acarbose. Among these derivatives, compound 10c (IC50 = 0.180 μM) demonstrated the highest potency and revealed a competitive inhibitory mechanism in kinetic studies (Ki = 0.15 μM). Docking and molecular dynamic evaluations elucidated the binding mode of 10c with the active site residues of the α-glucosidase enzyme. Moreover, in vivo assessments on a rat model of DM affirmed the anti-diabetic efficacy of 10c, evidenced by reduced fasting and overall blood glucose levels. The histopathological evaluation enhanced pancreatic islet architecture and hepatocytes in liver sections. In conclusion, novel 2-(quinoline-2-ylthio)acetamide derivatives as potent α-glucosidase inhibitors were developed. Compound 10c emerged as a promising candidate for diabetes management, warranting further investigation for potential clinical applications and mechanistic insights.
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Affiliation(s)
- Minoo Khalili Ghomi
- Department of Chemistry, Qom University of Technology, Qom, Iran; Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Milad Noori
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran; Pharmaceutical and Heterocyclic Chemistry Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Maryam Mirahmad
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Aida Iraji
- Research Center for Traditional Medicine and History of Medicine, Department of Persian Medicine, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran; Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ahmad Shahir Sadr
- Computer Science Department, Mathematical Sciences Faculty, Shahid Beheshti University, Tehran, Iran; School of Biological Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
| | - Navid Dastyafteh
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran; Pharmaceutical and Heterocyclic Chemistry Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Pooria Asili
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Gholami
- Toxicology and Diseases Specialty Group, Pharmaceutical Sciences Research Center (PSRC), Tehran University of Medical Sciences, Tehran, Iran
| | - Shahrzad Javanshir
- Pharmaceutical and Heterocyclic Chemistry Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Maryam Lotfi
- Department of Pathology, Amir-Alam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Somayeh Mojtabavi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Faramarzi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Asadi
- Department of Medicinal Chemistry, School of Pharmacy-International Campus, Iran University of Medical Science, Tehran, Iran
| | - Ensieh Nasli-Esfahani
- Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdie Palimi
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
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4
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Lam TP, Tran NVN, Pham LHD, Lai NVT, Dang BTN, Truong NLN, Nguyen-Vo SK, Hoang TL, Mai TT, Tran TD. Flavonoids as dual-target inhibitors against α-glucosidase and α-amylase: a systematic review of in vitro studies. NATURAL PRODUCTS AND BIOPROSPECTING 2024; 14:4. [PMID: 38185713 PMCID: PMC10772047 DOI: 10.1007/s13659-023-00424-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 11/27/2023] [Indexed: 01/09/2024]
Abstract
Diabetes mellitus remains a major global health issue, and great attention is directed at natural therapeutics. This systematic review aimed to assess the potential of flavonoids as antidiabetic agents by investigating their inhibitory effects on α-glucosidase and α-amylase, two key enzymes involved in starch digestion. Six scientific databases (PubMed, Virtual Health Library, EMBASE, SCOPUS, Web of Science, and WHO Global Index Medicus) were searched until August 21, 2022, for in vitro studies reporting IC50 values of purified flavonoids on α-amylase and α-glucosidase, along with corresponding data for acarbose as a positive control. A total of 339 eligible articles were analyzed, resulting in the retrieval of 1643 flavonoid structures. These structures were rigorously standardized and curated, yielding 974 unique compounds, among which 177 flavonoids exhibited inhibition of both α-glucosidase and α-amylase are presented. Quality assessment utilizing a modified CONSORT checklist and structure-activity relationship (SAR) analysis were performed, revealing crucial features for the simultaneous inhibition of flavonoids against both enzymes. Moreover, the review also addressed several limitations in the current research landscape and proposed potential solutions. The curated datasets are available online at https://github.com/MedChemUMP/FDIGA .
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Affiliation(s)
- Thua-Phong Lam
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam
- Faculty of Pharmacy, Uppsala University, 75105, Uppsala, Sweden
| | - Ngoc-Vi Nguyen Tran
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam
- Faculty of Pharmacy, Uppsala University, 75105, Uppsala, Sweden
| | - Long-Hung Dinh Pham
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam
- Department of Chemistry, Imperial College London, London, W12 0BZ, UK
| | - Nghia Vo-Trong Lai
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam
| | - Bao-Tran Ngoc Dang
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam
| | - Ngoc-Lam Nguyen Truong
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam
| | - Song-Ky Nguyen-Vo
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam
| | - Thuy-Linh Hoang
- California Northstate University College of Pharmacy, California, 95757, USA
| | - Tan Thanh Mai
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam.
| | - Thanh-Dao Tran
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, 700000, Ho Chi Minh City, Vietnam.
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Landeros-Martínez LL, Campos-Almazán MI, Sánchez-Bojorge NA, Flores R, Palomares-Báez JP, Rodríguez-Valdez LM. Theoretical Studies for the Discovery of Potential Sucrase-Isomaltase Inhibitors from Maize Silk Phytochemicals: An Approach to Treatment of Type 2 Diabetes. Molecules 2023; 28:6778. [PMID: 37836621 PMCID: PMC10574772 DOI: 10.3390/molecules28196778] [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: 08/09/2023] [Revised: 09/15/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
A theoretical analysis of the potential inhibition of human sucrase-isomaltase (SI) by flavonoids was carried out with the aim of identifying potential candidates for an alternative treatment of type 2 diabetes. Two compounds from maize silks, maysin and luteolin, were selected to be studied with the structure-based density functional theory (DFT), molecular docking (MDock), and molecular dynamics (MD) approaches. The docking score and MD simulations suggested that the compounds maysin and luteolin presented higher binding affinities in N-terminal sucrase-isomaltase (NtSI) than in C-terminal sucrase-isomaltase (CtSI). The reactivity parameters, such as chemical hardness (η) and chemical potential (µ), of the ligands, as well as of the active site amino acids of the NtSI, were calculated by the meta-GGA M06 functional in combination with the 6-31G(d) basis set. The lower value of chemical hardness calculated for the maysin molecule indicated that this might interact more easily with the active site of NtSI, in comparison with the values of the acarbose and luteolin structures. Additionally, a possible oxidative process was proposed through the quantum chemical calculations of the electronic charge transfer values (∆N) between the active site amino acids of the NtSI and the ligands. In addition, maysin displayed a higher ability to generate more oxidative damage in the NtSI active site. Our results suggest that maysin and luteolin can be used to develop novel α-glucosidase inhibitors via NtSI inhibition.
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Affiliation(s)
| | | | | | | | | | - Luz María Rodríguez-Valdez
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua 31125, Mexico; (L.-L.L.-M.); (M.I.C.-A.); (N.-A.S.-B.); (R.F.); (J.P.P.-B.)
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6
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Wawoczny A, Gillner D. The Most Potent Natural Pharmaceuticals, Cosmetics, and Food Ingredients Isolated from Plants with Deep Eutectic Solvents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37433265 PMCID: PMC10375538 DOI: 10.1021/acs.jafc.3c01656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
There is growing interest in reducing the number of synthetic products or additives and replacing them with natural ones. The pharmaceutical, cosmetic, and food industries are especially focused on natural and bioactive chemicals isolated from plants or microorganisms. The main challenge here is to develop efficient and ecological methods for their isolation. According to the strategies and rules of sustainable development and green chemistry, green solvents and environmentally friendly technologies must be used. The application of deep eutectic solvents as efficient and biodegradable solvents seems to be a promising alternative to traditional methods. They are classified as being green and ecological but, most importantly, very efficient extraction media compared to organic solvents. The aim of this review is to present the recent findings on green extraction, as well as the biological activities and the possible applications of natural plant ingredients, namely, phenolics, flavonoids, terpenes, saponins, and some others. This paper thoroughly reviews modern, ecological, and efficient extraction methods with the use of deep eutectic solvents (DESs). The newest findings, as well as the factors influencing the efficiency of extraction, such as water content, and hydrogen bond donor and acceptor types, as well as the extraction systems, are also discussed. New solutions to the major problem of separating DESs from the extract and for solvent recycling are also presented.
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Affiliation(s)
- Agata Wawoczny
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland
- Biotechnology Centre, Silesian University of Technology, 44-100 Gliwice, Poland
| | - Danuta Gillner
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland
- Biotechnology Centre, Silesian University of Technology, 44-100 Gliwice, Poland
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Djeujo FM, Stablum V, Pangrazzi E, Ragazzi E, Froldi G. Luteolin and Vernodalol as Bioactive Compounds of Leaf and Root Vernonia amygdalina Extracts: Effects on α-Glucosidase, Glycation, ROS, Cell Viability, and In Silico ADMET Parameters. Pharmaceutics 2023; 15:pharmaceutics15051541. [PMID: 37242783 DOI: 10.3390/pharmaceutics15051541] [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: 03/27/2023] [Revised: 05/15/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023] Open
Abstract
The aqueous decoctions of Vernonia amygdalina (VA) leaves and roots are widely used in traditional African medicine as an antidiabetic remedy. The amount of luteolin and vernodalol in leaf and root extracts was detected, and their role was studied regarding α-glucosidase activity, bovine serum albumin glycation (BSA), reactive oxygen species (ROS) formation, and cell viability, together with in silico absorption, distribution, metabolism, excretion, and toxicity (ADMET) properties. Vernodalol did not affect α-glucosidase activity, whereas luteolin did. Furthermore, luteolin inhibited the formation of advanced glycation end products (AGEs) in a concentration-dependent manner, whereas vernodalol did not reduce it. Additionally, luteolin exhibited high antiradical activity, while vernodalol demonstrated a lower scavenger effect, although similar to that of ascorbic acid. Both luteolin and vernodalol inhibited HT-29 cell viability, showing a half-maximum inhibitory concentration (IC50) of 22.2 µM (-Log IC50 = 4.65 ± 0.05) and 5.7 µM (-Log IC50 = 5.24 ± 0.16), respectively. Finally, an in silico ADMET study showed that both compounds are suitable candidates as drugs, with appropriate pharmacokinetics. This research underlines for the first time the greater presence of vernodalol in VA roots compared to leaves, while luteolin is prevalent in the latter, suggesting that the former could be used as a natural source of vernodalol. Consequently, root extracts could be proposed for vernodalol-dependent antiproliferative activity, while leaf extracts could be suggested for luteolin-dependent effects, such as antioxidant and antidiabetic effects.
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Affiliation(s)
| | - Valentina Stablum
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Elisa Pangrazzi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Eugenio Ragazzi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Guglielmina Froldi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
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8
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Asproni B, Catto M, Loriga G, Murineddu G, Corona P, Purgatorio R, Cichero E, Fossa P, Scarano N, Martínez AL, Brea J, Pinna GA. Novel thienocycloalkylpyridazinones as useful scaffolds for acetylcholinesterase inhibition and serotonin 5-HT6 receptor interaction. Bioorg Med Chem 2023; 84:117256. [PMID: 37003157 DOI: 10.1016/j.bmc.2023.117256] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/10/2023] [Accepted: 03/17/2023] [Indexed: 03/31/2023]
Abstract
A library of eighteen thienocycloalkylpyridazinones was synthesized for human acetylcholinesterase (hAChE) and butyrylcholinesterase (hBChE) inhibition and serotonin 5-HT6 receptor subtype interaction by following a multitarget-directed ligand approach (MTDL), as a suitable strategy for treatment of Alzheimer's disease (AD). The novel compounds featured a tricyclic scaffold, namely thieno[3,2-h]cinnolinone, thienocyclopentapyridazinone and thienocycloheptapyridazinone, connected through alkyl chains of variable length to proper amine moieties, most often represented by N-benzylpiperazine or 1-(phenylsulfonyl)-4-(piperazin-1-ylmethyl)-1H-indole as structural elements addressing AChE and 5-HT6 interaction, respectively. Our study highlighted the versatility of thienocycloalkylpyridazinones as useful architectures for AChE interaction, with several N-benzylpiperazine-based analogues emerging as potent and selective hAChE inhibitors with IC50 in the 0.17-1.23 μM range, exhibiting low to poor activity for hBChE (IC50 = 4.13-9.70 μM). The introduction of 5-HT6 structural moiety phenylsulfonylindole in place of N-benzylpiperazine, in tandem with a pentamethylene linker, gave potent 5-HT6 thieno[3,2-h]cinnolinone and thienocyclopentapyridazinone-based ligands both displaying hAChE inhibition in the low micromolar range and unappreciable activity towards hBChE. While docking studies provided a rational structural explanation for AChE/BChE enzyme and 5-HT6 receptor interaction, in silico prediction of ADME properties of tested compounds suggested further optimization for development of such compounds in the field of MTDL for AD.
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Sciacca C, Cardullo N, Pulvirenti L, Di Francesco A, Muccilli V. Evaluation of honokiol, magnolol and of a library of new nitrogenated neolignans as pancreatic lipase inhibitors. Bioorg Chem 2023; 134:106455. [PMID: 36913880 DOI: 10.1016/j.bioorg.2023.106455] [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: 12/27/2022] [Revised: 02/16/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023]
Abstract
Obesity is a complex disease defined as an excessive amount of body fat. It is considered a risk factor for several pathologies; therefore, there is an increasing interest in its treatment. Pancreatic lipase (PL) plays a key role in fat digestion, and its inhibition is a preliminary step in the search for anti-obesity agents. For this reason, many natural compounds and their derivatives are studied as new PL inhibitors. This study reports the synthesis of a library of new compounds inspired by two natural neolignans, honokiol (1) and magnolol (2) and bearing amino or nitro groups linked to a biphenyl core. The synthesis of unsymmetrically substituted biphenyls was achieved through an optimisation of the Suzuki-Miyaura cross-coupling reaction followed by the insertion of allyl chains, thus furnishing the O- and/or N-allyl derivatives, and finally, a sigmatropic rearrangement yielding in some cases, the C-allyl analogues. Magnolol, honokiol and the twenty-one synthesised biphenyls were evaluated for their in vitro inhibitory activity toward PL. Three compounds (15b, 16 and 17b) were more effective inhibitors than the natural neolignans (magnolol IC50 = 158.7 µM and honokiol IC50 = 115.5 µM) with IC50 of 41-44 µM. Detailed studies through kinetics suggested better inhibitory activity of the synthetic analogues compared with the natural 1 and 2. Magnolol (Ki = 614.3 µM; K'i of 140.9 µM) and the synthetic biphenyls 15b (Ki = 286.4 µM; K'i = 36.6 µM) and 16 (Ki = 176.2 µM; K'i = 6.4 µM) are mixed-type inhibitors, whereas honokiol (Ki = 674.8 µM) and 17b (Ki = 249 µM) are competitive inhibitors. Docking studies corroborated these findings, showing the best fitting for intermolecular interaction between biphenyl neolignans and PL. The above outcomes highlighted how the proposed structures could be considered interesting candidates for future studies for the development of more effective PL inhibitors.
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Affiliation(s)
- Claudia Sciacca
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6. 95125, Catania, Italy
| | - Nunzio Cardullo
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6. 95125, Catania, Italy
| | - Luana Pulvirenti
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6. 95125, Catania, Italy
| | - Antonella Di Francesco
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6. 95125, Catania, Italy
| | - Vera Muccilli
- Department of Chemical Sciences, University of Catania, V.le A. Doria 6. 95125, Catania, Italy.
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Muruganathan N, Dhanapal AR, Baskar V, Muthuramalingam P, Selvaraj D, Aara H, Shiek Abdullah MZ, Sivanesan I. Recent Updates on Source, Biosynthesis, and Therapeutic Potential of Natural Flavonoid Luteolin: A Review. Metabolites 2022; 12:1145. [PMID: 36422285 PMCID: PMC9696498 DOI: 10.3390/metabo12111145] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/16/2022] [Accepted: 11/18/2022] [Indexed: 08/27/2023] Open
Abstract
Nature gives immense resources that are beneficial to humankind. The natural compounds present in plants provide primary nutritional values to our diet. Apart from food, plants also provide chemical compounds with therapeutic values. The importance of these plant secondary metabolites is increasing due to more studies revealing their beneficial properties in treating and managing various diseases and their symptoms. Among them, flavonoids are crucial secondary metabolite compounds present in most plants. Of the reported 8000 flavonoid compounds, luteolin is an essential dietary compound. This review discusses the source of the essential flavonoid luteolin in various plants and its biosynthesis. Furthermore, the potential health benefits of luteolins such as anti-cancer, anti-microbial, anti-inflammatory, antioxidant, and anti-diabetic effects and their mechanisms are discussed in detail. The activity of luteolin and its derivatives are diverse, as they help to prevent and control many diseases and their life-threatening effects. This review will enhance the knowledge and recent findings regarding luteolin and its therapeutic effects, which are certainly useful in potentially utilizing this natural metabolite.
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Affiliation(s)
- Nandakumar Muruganathan
- Department of Plant Pathology and Microbiology, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Anand Raj Dhanapal
- Department of Biotechnology, Karpagam Academy of Higher Education, Coimbatore 641021, Tamil Nadu, India
- Centre for Plant Tissue Culture & Central Instrumentation Laboratory, Karpagam Academy of Higher Education, Coimbatore 641021, Tamil Nadu, India
| | - Venkidasamy Baskar
- Department of Oral & Maxillofacial Surgery, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai 600077, Tamil Nadu, India
| | - Pandiyan Muthuramalingam
- Division of Horticultural Science, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52725, Republic of Korea
| | - Dhivya Selvaraj
- Department of Computer Science and Engineering CSE-AI, Amrita School of Engineering, Chennai 601103, Tamil Nadu, India
| | - Husne Aara
- Department of Biotechnology, Karpagam Academy of Higher Education, Coimbatore 641021, Tamil Nadu, India
| | | | - Iyyakkannu Sivanesan
- Department of Bioresources and Food Science, Institute of Natural Science and Agriculture, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 05029, Republic of Korea
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11
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Froldi G, Djeujo FM, Bulf N, Caparelli E, Ragazzi E. Comparative Evaluation of the Antiglycation and Anti-α-Glucosidase Activities of Baicalein, Baicalin (Baicalein 7- O-Glucuronide) and the Antidiabetic Drug Metformin. Pharmaceutics 2022; 14:pharmaceutics14102141. [PMID: 36297576 PMCID: PMC9612222 DOI: 10.3390/pharmaceutics14102141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/03/2022] [Accepted: 10/04/2022] [Indexed: 11/05/2022] Open
Abstract
The discovery of new oral antidiabetic drugs remains a priority in medicine. This research aimed to evaluate the activity of the flavonoid baicalein and its natural glucuronide baicalin, compared to the antidiabetic drug metformin, as potential antiglycation, anti–radical, and anti-α–glucosidase agents, in order to assess their potential role in counteracting hyperglycemia-induced tissue damage. The study considered: (i) the BSA assay, to detect the formation of advanced glycation end products (AGEs), (ii) the GK peptide–ribose assay, which evaluates the cross–linking between the peptide and ribose, and (iii) the carbonyl content assay to detect the total carbonyl content, as a biomarker of tissue damage. In addition, to obtain a reliable picture of the antiglycation capacity of the investigated compounds, DPPH scavenging and oxygen radical absorbance capacity (ORAC) assays were performed. Furthermore, the anti–α–glucosidase activity of baicalein and baicalin was detected. Furthermore, to estimate cell permeability, preliminarily, the cytotoxicity of baicalein and baicalin was evaluated in HT–29 human colon adenocarcinoma cells using the MTT assay. Successively, the ability of the compounds to pass through the cytoplasmic membranes of HT–29 cells was detected as a permeability screen to predict in vivo absorption, showing that baicalein passes into cells even if it is quickly modified in various metabolites, being its main derivative baicalin. Otherwise, baicalin per se did not pass through cell membranes. Data show that baicalein is the most active compound in reducing glycation, α-glucosidase activity, and free radicals, while baicalin exhibited similar activities, but did not inhibit the enzyme α–glucosidase.
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De La Cruz-Jiménez L, Hernández-Torres MA, Monroy-García IN, Rivas-Morales C, Verde-Star MJ, Gonzalez-Villasana V, Viveros-Valdez E. Biological Activities of Seven Medicinal Plants Used in Chiapas, Mexico. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11141790. [PMID: 35890424 PMCID: PMC9316193 DOI: 10.3390/plants11141790] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/28/2022] [Accepted: 07/01/2022] [Indexed: 05/17/2023]
Abstract
Seven medicinal plants from Chiapas, Mexico, used by Native Americans were analyzed, aiming to improve the understanding of their medicinal properties through the evaluation of various biological activities, i.e., bactericidal, antioxidant, α-glucosidase inhibition, and toxicity, to provide a scientific basis for the management of infectious and hyperglycemic diseases in the Mexican southeast. Plant extracts were obtained from Cordia dodecandra, Gaultheria odorata, Heliotropium angiospermum, Justicia spicigera, Leucaena collinsii spp. collinsii, Tagetes nelsonii, and Talisia oliviformis through maceration techniques using methanol and chloroform (1:1). Minimum Inhibitory Concentration (MIC) was employed to determine the antibacterial activity against Staphylococcus aureus, Enterobacter faecalis, Escherichia coli, Enterobacter aerogenes, Enterobacter cloacae, Klebsiella pneumoniae, and Pseudomonas aeuroginosa. The antiradical/antioxidant activity was determined by the 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays and antihemolytic activity using the 2,2’-Azobis(2-amidinopropane) dihydrochloride radical (APPH). The anti-α-glucosidase activity was evaluated in vitro through the chromogenic PNPG assay. The toxicity was assessed using the brine shrimp lethality assay. The highest antimicrobial activity was displayed by T. nelsonii, mainly against E. faecalis and P. aeuroginosa. The extracts of L. collinsii, J. spicigera, and T. nelsonii possess antioxidant properties with EC50 < 50 μg/mL. J. spicigera and T. nelsonii extracts showed the highest antihemolytic activity with IC50 < 14 μg/mL. T. nelsonii exhibited a remarkable inhibitor effect on the α-glucosidase enzyme and the greatest toxic effect on Artemia salina with IC50 = 193 ± 20 μg/mL and LD50 = 14 ± 1 μg/mL, respectively. According to our results, G. odorata, J. spicigera, T. nelsonii, and T. oliviformis extracts contained active antimicrobial compounds. At the same time, T. nelsonii stands to be a possible source of effective antineoplastic and antihyperglycemic compounds.
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Affiliation(s)
- Liliana De La Cruz-Jiménez
- Department of Chemistry, College of Biological Sciences, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, San Nicolás de los Garza 66450, Nuevo León, Mexico; (L.D.L.C.-J.); (M.A.H.-T.); (I.N.M.-G.); (C.R.-M.); (M.J.V.-S.)
| | - Mario Alberto Hernández-Torres
- Department of Chemistry, College of Biological Sciences, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, San Nicolás de los Garza 66450, Nuevo León, Mexico; (L.D.L.C.-J.); (M.A.H.-T.); (I.N.M.-G.); (C.R.-M.); (M.J.V.-S.)
| | - Imelda N. Monroy-García
- Department of Chemistry, College of Biological Sciences, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, San Nicolás de los Garza 66450, Nuevo León, Mexico; (L.D.L.C.-J.); (M.A.H.-T.); (I.N.M.-G.); (C.R.-M.); (M.J.V.-S.)
- Tecnológico Nacional de México, Instiuto Tecnológico de Los Mochis, Departamento de Ingeniería Química y Bioquímica, Juan de Dios Bátiz y 20 de Noviembre, Los Mochis 81259, Sinaloa, Mexico
| | - Catalina Rivas-Morales
- Department of Chemistry, College of Biological Sciences, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, San Nicolás de los Garza 66450, Nuevo León, Mexico; (L.D.L.C.-J.); (M.A.H.-T.); (I.N.M.-G.); (C.R.-M.); (M.J.V.-S.)
| | - María Julia Verde-Star
- Department of Chemistry, College of Biological Sciences, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, San Nicolás de los Garza 66450, Nuevo León, Mexico; (L.D.L.C.-J.); (M.A.H.-T.); (I.N.M.-G.); (C.R.-M.); (M.J.V.-S.)
| | - Vianey Gonzalez-Villasana
- Department of Cellular Biology and Genetics, College of Biological Sciences, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, San Nicolás de los Garza 66450, Nuevo León, Mexico;
| | - Ezequiel Viveros-Valdez
- Department of Chemistry, College of Biological Sciences, Universidad Autónoma de Nuevo León, Av. Pedro de Alba S/N, San Nicolás de los Garza 66450, Nuevo León, Mexico; (L.D.L.C.-J.); (M.A.H.-T.); (I.N.M.-G.); (C.R.-M.); (M.J.V.-S.)
- Correspondence: ; Tel.: +52-(81)-14-93-9311
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In Vitro Alpha-Glucosidase Inhibitory Activity and the Isolation of Luteolin from the Flower of Gymnanthemum amygdalinum (Delile) Sch. Bip ex Walp. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072132. [PMID: 35408529 PMCID: PMC9000735 DOI: 10.3390/molecules27072132] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 11/24/2022]
Abstract
Diabetes mellitus is a major health issue that has posed a significant challenge over the years. Gymnanthemum amygdalinum is a well-known plant that can be potentially used to treat this disease. Therefore, this study aimed to evaluate the inhibitory effect of its root, stem bark, leaves, and flower extracts on alpha-glucosidase using an in vitro inhibition assay to isolate the bioactive compounds and determine their levels in the samples. The air-dried plant parts were extracted by maceration using methanol. The results showed that the flower extract had the greatest inhibitory effect (IC50 47.29 ± 1.12 µg/mL), followed by the leaves, roots, and stem bark. The methanolic flower extract was further fractionated with different solvents, and the ethyl acetate fraction showed the strongest activity (IC50 19.24 ± 0.12 µg/mL). Meanwhile, acarbose was used as a positive control (IC50 73.36 ± 3.05 µg/mL). Characterization based on UV, 1H-, and 13C-NMR established that the ethyl acetate fraction yielded two flavonoid compounds, namely, luteolin and 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-4H-chromen-4-on, which had IC50 values of 6.53 ± 0.16 µg/mL and 39.95 ± 1.59 µg/mL, respectively. The luteolin levels in the crude drug, methanolic extract, and ethyl acetate fraction were 3.4 ± 0.2 mg (0.3%), 32.4 ± 0.8 mg (3.2%), and 68.9 ± 3.4 mg (6.9%) per 1 g samples, respectively. These results indicated that the G. amygdalinum flower extract exerted potent inhibitory alpha-glucosidase activity.
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