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Shahab F, Hameed A, Ali A, Imad R, Hafizur RM. Apigenin potentiates glucose-stimulated insulin secretion through the PKA-MEK kinase signaling pathway independent of K-ATP channels. Biomed Pharmacother 2024; 177:116986. [PMID: 38906017 DOI: 10.1016/j.biopha.2024.116986] [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: 02/22/2024] [Revised: 06/04/2024] [Accepted: 06/15/2024] [Indexed: 06/23/2024] Open
Abstract
AIM Apigenin, a natural bioflavonoid, is reported as an anti-diabetic agent since it possesses the ability to inhibit α-glucosidase activity, cause stimulation of insulin action and secretion, manage ROS, and prevent diabetes complications. Apigenin was identified as a new insulin secretagogue that enhances glucose-stimulated insulin secretion and seems like a better antidiabetic drug candidate. Here we explored the insulinotropic mechanism(s) of apigenin in vitro in mice islets and in vivo in diabetic rats. METHODS Size-matched pancreatic islets were divided into groups and incubated in the presence or absence of apigenin and agonists or antagonists of major insulin signaling pathways. The secreted insulin was measured by ELISA. The intracellular cAMP was estimated by cAMP acetylation assay. The acute and chronic effects of apigenin were evaluated in diabetic rats. RESULTS apigenin dose-dependently enhanced insulin secretion in isolated mice islets, and its insulinotropic effect was exerted at high glucose concentrations distinctly different from glibenclamide. Furthermore, apigenin amplified glucose-induced insulin secretion in depolarized and glibenclamide-treated islets. Apigenin showed no effect on intracellular cAMP concentration; however, an additive effect was observed by apigenin in both forskolin and IBMX-induced insulin secretion. Interestingly, H89, a PKA inhibitor, and U0126, a MEK kinase inhibitor, significantly inhibited apigenin-induced insulin secretion; however, no significant effect was observed by using ESI-05, an epac2 inhibitor. Apigenin improved glucose tolerance and increased glucose-stimulated plasma insulin levels in diabetic rats. Apigenin also lowered blood glucose in diabetic rats upon chronic treatment. CONCLUSION Apigenin exerts glucose-stimulated insulin secretion by modulating the PKA-MEK kinase signaling cascade independent of K-ATP channels.
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Affiliation(s)
- Falak Shahab
- Ziauddin College of Molecular Medicine, Ziauddin University Karachi, Pakistan
| | - Abdul Hameed
- Ziauddin College of Molecular Medicine, Ziauddin University Karachi, Pakistan; Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
| | - Akhtar Ali
- Department of Pharmacology, Ziauddin University Karachi, Pakistan
| | - Rehan Imad
- Ziauddin College of Molecular Medicine, Ziauddin University Karachi, Pakistan
| | - Rahman M Hafizur
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Department of Biochemistry and Molecular Biology, Dhaka International University, Dhaka, Bangladesh; Daffodil International University, Daffodil Smart City, Birulia, Savar, Dhaka 1216, Bangladesh
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Shahwar D, Baqai S, Khan F, Khan MI, Javaid S, Hameed A, Raza A, Saleem Uddin S, Hazrat H, Rahman MH, Musharraf SG, Chotani MA. Proteomic Analysis of Rap1A GTPase Signaling-Deficient C57BL/6 Mouse Pancreas and Functional Studies Identify an Essential Role of Rap1A in Pancreas Physiology. Int J Mol Sci 2024; 25:8013. [PMID: 39125590 PMCID: PMC11312117 DOI: 10.3390/ijms25158013] [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: 06/07/2024] [Revised: 07/11/2024] [Accepted: 07/14/2024] [Indexed: 08/12/2024] Open
Abstract
Ras-related Rap1A GTPase is implicated in pancreas β-cell insulin secretion and is stimulated by the cAMP sensor Epac2, a guanine exchange factor and activator of Rap1 GTPase. In this study, we examined the differential proteomic profiles of pancreata from C57BL/6 Rap1A-deficient (Null) and control wild-type (WT) mice with nanoLC-ESI-MS/MS to assess targets of Rap1A potentially involved in insulin regulation. We identified 77 overlapping identifier proteins in both groups, with 8 distinct identifier proteins in Null versus 56 distinct identifier proteins in WT mice pancreata. Functional enrichment analysis showed four of the eight Null unique proteins, ERO1-like protein β (Ero1lβ), triosephosphate isomerase (TP1), 14-3-3 protein γ, and kallikrein-1, were exclusively involved in insulin biogenesis, with roles in insulin metabolism. Specifically, the mRNA expression of Ero1lβ and TP1 was significantly (p < 0.05) increased in Null versus WT pancreata. Rap1A deficiency significantly affected glucose tolerance during the first 15-30 min of glucose challenge but showed no impact on insulin sensitivity. Ex vivo glucose-stimulated insulin secretion (GSIS) studies on isolated Null islets showed significantly impaired GSIS. Furthermore, in GSIS-impaired islets, the cAMP-Epac2-Rap1A pathway was significantly compromised compared to the WT. Altogether, these studies underscore an essential role of Rap1A GTPase in pancreas physiological function.
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Affiliation(s)
- Durrey Shahwar
- Molecular Signaling Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (D.S.); (S.B.); (S.J.); (A.R.); (S.S.U.); (H.H.)
| | - Sadaf Baqai
- Molecular Signaling Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (D.S.); (S.B.); (S.J.); (A.R.); (S.S.U.); (H.H.)
| | - Faisal Khan
- Mass Spectrometry Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (F.K.); (S.G.M.)
- Husein Ebrahim Jamal (H.E.J.) Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - M. Israr Khan
- Molecular Diabetology Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (M.I.K.); (M.H.R.)
| | - Shafaq Javaid
- Molecular Signaling Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (D.S.); (S.B.); (S.J.); (A.R.); (S.S.U.); (H.H.)
| | - Abdul Hameed
- Ziauddin College of Molecular Medicine, Ziauddin University, Clifton, Karachi 75600, Pakistan;
| | - Aisha Raza
- Molecular Signaling Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (D.S.); (S.B.); (S.J.); (A.R.); (S.S.U.); (H.H.)
| | - Sadaf Saleem Uddin
- Molecular Signaling Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (D.S.); (S.B.); (S.J.); (A.R.); (S.S.U.); (H.H.)
| | - Hina Hazrat
- Molecular Signaling Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (D.S.); (S.B.); (S.J.); (A.R.); (S.S.U.); (H.H.)
| | - M. Hafizur Rahman
- Molecular Diabetology Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (M.I.K.); (M.H.R.)
- Daffodil International University, Birulia, Savar, Dhaka 1216, Bangladesh
- Dhaka International University, Satarkul, Badda, Dhaka 1212, Bangladesh
| | - Syed Ghulam Musharraf
- Mass Spectrometry Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (F.K.); (S.G.M.)
- Husein Ebrahim Jamal (H.E.J.) Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Maqsood A. Chotani
- Molecular Signaling Laboratory, Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD), International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (D.S.); (S.B.); (S.J.); (A.R.); (S.S.U.); (H.H.)
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Olatunji OJ, Zuo J, Olatunde OO. Securidaca inappendiculata stem extract confers robust antioxidant and antidiabetic effects against high fructose/streptozotocin induced type 2 diabetes in rats. Exploration of bioactive compounds using UHPLC-ESI-QTOF-MS. Arch Physiol Biochem 2023; 129:1187-1199. [PMID: 33983859 DOI: 10.1080/13813455.2021.1921811] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 04/20/2021] [Indexed: 10/21/2022]
Abstract
Diabetes mellitus is the most deadly and most prevalent metabolic disease of contemporary times. This study evaluated the antidiabetic, antioxidant, and pancreato-protective effects of Securidaca inappendiculata extract (SIE) in high-fructose/streptozotocin-induced type 2 diabetes. SIE (50, 100, and 200 mg/kg) was administered to diabetic rats for 8 weeks, thereafter glycaemic parameters, pancreatic β cell function, lipid profile, hepatorenal function, and antioxidant parameters were evaluated in diabetic rats treated SIE. The results indicated that treatment with SIE markedly lowered blood glucose, lipid parameters, hepatorenal function parameters, and lipid peroxidation at the end of the intervention. Additionally, serum insulin levels were significantly increased as supported by restoration of pancreatic β-cell cells in the H&E staining. Moreover, SIE also upregulated serum antioxidant enzyme activities in the treated diabetic rats. The results revealed that SIE possesses potent antihyperglycemic and antihyperlipidemic and antioxidant effects with the considerable restoration of pancreatic β-cells function.
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Affiliation(s)
| | - Jian Zuo
- Department of Traditional Chinese Medicine, The first Affiliated Hospital of Wannan Medical College (Yijishan Hospital), Wuhu, China
| | - Oladipupo Odunayo Olatunde
- International Center of Excellence in Seafood Science and Innovation, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Thailand
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Sahu N, Singh N, Arya KR, Reddy SS, Rai AK, Shukla V, Pandey J, Narender T, Tamrakar AK, Kumar B, Rajak BK, Malik S, Rustagi S. Assessment of the dual role of Lyonia ovalifolia (Wall.) Drude in inhibiting AGEs and enhancing GLUT4 translocation through LC-ESI-QTOF-MS/MS determination and in silico studies. Front Pharmacol 2023; 14:1073327. [PMID: 37050897 PMCID: PMC10083281 DOI: 10.3389/fphar.2023.1073327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 02/13/2023] [Indexed: 03/28/2023] Open
Abstract
Introduction: Diabetes mellitus (DM) is a metabolic disorder that results in glucose accumulation in the blood, accompanied by the production of advanced glycation end products (AGEs) through glycation of cellular proteins. These AGEs interfere with insulin signaling and prevent GLUT4 membrane translocation, thereby promoting the accumulation of more glucose in the blood and causing post-diabetic complications.Methods: In this study, we examine the anti-diabetic potential of Lyonia ovalifolia (Wall.) Drude, a well-known ethnomedicinal plant of the Indian Himalayas. Considering its various medicinal properties, we analyzed its ethanolic extract and various solvent fractions for in vitro antiglycation activity and antidiabetic potential, i.e., stimulation of GLUT4 translocation.Result and Discussions: The results showed that the extract and fractions exhibited increased antiglycation activity and an increased level of GLUT4 translocation. Analysis of a further 12 bioactive compounds of ethanolic extract, identified through LC-ESI-QTOF-MS/MS, revealed the presence of three new compounds: leucothol B, rhodoterpenoids A, and leucothol A. Moreover, we performed molecular docking of identified compounds against key proteins of diabetes mellitus: the sirtuin family of NAD (+)-dependent protein deacetylases 6 (SIRT6), aldose reductase (AR), and tyrosine kinase (TK). The results showed that flavonoid luteolin showed the best binding affinity ((−12.3 kcal/mol), followed by eriodictyol, astilbin, and syringaresinol. An ADMET study showed that luteolin, eriodictyol, astilbin, and syringaresinol may be promising drug candidates belonging to the flavonoid class of compounds, with no harmful effects and complying with all the drug-likeness guidelines. Furthermore, molecular dynamics (MD) simulations on a 50 ns timescale revealed that AR protein was most stable with luteolin throughout the simulation period. Therefore, this study reveals for the first time that L. ovalifolia plays an important role in insulin homeostasis, as shown in in vitro and in silico studies.
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Affiliation(s)
- Neha Sahu
- Department of Botany, University of Lucknow, Lucknow, India
- Botany Division, CSIR-Central Drug Research Institute, Lucknow, India
- *Correspondence: Neha Sahu,
| | - Nitesh Singh
- Department of Plant Pathology, Faculty of Agriculture Sciences, SGT University, Gurugram, India
| | - Kamal Ram Arya
- Botany Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Sabbu Sathish Reddy
- Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, India
| | - Amit Kumar Rai
- Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Vijaya Shukla
- Sophisticated Analytical Instrument Facility, CSIR-Central Drug Research Institute, Lucknow, India
| | - Jyotsana Pandey
- Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow, India
| | - Tadigoppula Narender
- Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, India
| | | | - Brijesh Kumar
- Sophisticated Analytical Instrument Facility, CSIR-Central Drug Research Institute, Lucknow, India
| | - Bikash Kumar Rajak
- Department of Bioinformatics, Central University of South Bihar, Gaya, India
| | - Sumira Malik
- Amity Institute of Biotechnology, Amity University, Ranchi, Jharkhand, India
| | - Sarvesh Rustagi
- Department of Food Technology, School of Applied and Life sciences, Uttaranchal University, Dehradun, Uttarakhand, India
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Pérez-Ramírez IF, Herrera MD, Mora O, Ramos-Gómez M, Martínez-Alarcón D, Reynoso-Camacho R. Effect of different pigmented cooked common beans on glucose and lipid metabolism in obese rats and 3T3 L1 cells. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Vigbedor BY, Osei Akoto C, Neglo D. Isolation and Identification of Flavanone Derivative Eriodictyol from the Methanol Extract of Afzelia africana Bark and Its Antimicrobial and Antioxidant Activities. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2023; 2023:9345047. [PMID: 37200890 PMCID: PMC10188263 DOI: 10.1155/2023/9345047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/27/2023] [Accepted: 03/16/2023] [Indexed: 05/20/2023]
Abstract
Background Afzelia africana is a plant species with well-documented ethnobotanical and medicinal properties. The plant is reported to have various secondary metabolites and had been applied for the treatment of various diseased conditions. Objectives The study objectives include fractionation, isolation, purification, and characterization of eriodictyol from the bark of A. africana, and the determination of its antimicrobial and antioxidant activities. Methodology. The series of methodologies that were employed include fractionations and purification (column chromatography), characterization (HPLC, LC-MS, IR, 1H, 13C, DEPT-135, HSQC, and HMBC), antimicrobial assays (microbroth dilution and checkerboard assay), and antioxidant activities assays (ABTS and DPPH scavenging capacity). Results The study reports the identification and characterization of eriodictyol from the bark of A. africana which exhibited potent antioxidant activities against ABTS and DPPH radicals with scavenging capacities (SC50) of 2.14 ± 0.05 and 2.51 ± 0.06 µg/mL, respectively. The compound exhibited its antimicrobial activity by reporting good bacteriostatic activities (MBC/MIC > 4) against Staphylococcus aureus (SA), methicillin-resistant Staphylococcus aureus (MRSA), and fluconazole-resistant Candida albicans (CA2). Moreover, a broad spectrum of bactericidal effects (MBC/MIC ≤ 4) was reported against Streptococcus mutans (SM), Escherichia coli (EC), Bacillus subtilis (BS), Klebsiella pneumonia (KP), Pseudomonas aeruginosa (PA), Salmonella typhi (ST), and standard Candida albicans (CA1). The compound further exhibited synergistic effects against EC, KP, ST, and MRSA; ST; and CA2 when combined with ciprofloxacin, tetracycline, and nystatin, respectively. However, antagonistic effects were observed against PA and CA1 when combined with ciprofloxacin and ketoconazole, respectively. Conclusion The study reports for the first time the identification of eriodictyol from the bark of A. africana which exhibited significant antioxidant and antimicrobial properties.
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Affiliation(s)
- Bright Yaw Vigbedor
- Department of Basic Sciences, School of Basic and Biomedical Sciences, University of Health and Allied Sciences, Ho, Ghana
| | - Clement Osei Akoto
- Department of Chemistry, Faculty of Physical and Computational Sciences, College of Science, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana
| | - David Neglo
- Department of Basic Sciences, School of Basic and Biomedical Sciences, University of Health and Allied Sciences, Ho, Ghana
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Gangadhariah M, Pardhi T, Ravilla J, Chandra S, Singh SA. Citrus nutraceutical eriocitrin and its metabolites are partial agonists of peroxisome proliferator-activated receptor gamma (PPARγ): a molecular docking and molecular dynamics study. J Biomol Struct Dyn 2022; 41:11373-11393. [PMID: 36576222 DOI: 10.1080/07391102.2022.2162127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 12/18/2022] [Indexed: 12/29/2022]
Abstract
Peroxisome proliferator-activated receptor gamma (PPARγ) agonists are potent insulin sensitizers in treating type 2 diabetes. Despite being very effective in the fight against diabetes-mediated complications, PPARγ agonists are accompanied by severe side effects leading to complicated health problems, making the discovery of novel safe ligands highly pertinent. A significant intense research effort is in progress to explore the PPARγ activating potential of a wide range of natural compounds. Lemon (Citrus limon) contains various bioactive flavonoids, and eriocitrin is the major flavonoid. It possesses substantial antioxidant and anticancer, lipid-lowering activities and prevents obesity-associated metabolic diseases. Eriocitrin is metabolized to eriodictyol in the intestine, and the absorbed eriodictyol undergoes conversion to numerous metabolites in vivo. It is unclear if eriocitrin or its metabolites are responsible for their beneficial effects. We have used molecular docking, ADMET properties, drug-likeness score and molecular dynamics simulation study to find if eriocitrin and its metabolites are potent binders for PPARγ. Docking studies revealed that eriocitrin binds to PPARγ with the highest binding energy, but ADMET properties and in vivo studies show that the bioavailability of eriocitrin is very poor. Molecular dynamics studies were carried out to validate the docking results, and multiple parameters like RMSD, RMSF, Radius of gyration, SASA, hydrogen bond analysis, interaction energy, principal component analysis, Gibbs free energy and MM-PBSA were calculated. Based on our studies, eriodictyol, eriodictyol 7-O-glucuronide, eriodictyol 3'-O-glucuronide, homoeriodictyol and homoeriodictyol 7-O-glucuronide which are metabolites of eriocitrin appear to be potent partial agonists of PPARγ under physiological conditions.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mahesha Gangadhariah
- Department of Traditional Foods and Applied Nutrition, CSIR-Central Food Technological Research Institute, Mysuru, Karnataka, India
| | - Triveni Pardhi
- Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland, OH, USA
| | - Jahnavi Ravilla
- Department of Traditional Foods and Applied Nutrition, CSIR-Central Food Technological Research Institute, Mysuru, Karnataka, India
| | - Subhash Chandra
- Computational Biology & Biotechnology Laboratory Department of Botany, Soban Singh Jeena University S.S.J. Campus, Almora, Uttarakhand, India
| | - Sridevi Annapurna Singh
- Department of Traditional Foods and Applied Nutrition, CSIR-Central Food Technological Research Institute, Mysuru, Karnataka, India
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In vitro ovicidal activity of Brongniartia montalvoana against small ruminant gastrointestinal nematodes. Exp Parasitol 2022; 240:108336. [PMID: 35850275 DOI: 10.1016/j.exppara.2022.108336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 07/07/2022] [Accepted: 07/12/2022] [Indexed: 11/22/2022]
Abstract
Several plants of the Fabaceae family have been assessed regarding their high nutritional value and anthelmintic properties. The ovicidal effect of the hydroalcoholic extract (Bm-HAE) and subfractions from the aerial parts of Brongniartia montalvoana (Fabaceae) against a mixed strain of gastrointestinal nematodes (GIN) (Haemonchus spp., Trichostrongylus spp. and Oesophagostomum spp.) resistant to albendazole sulfoxide, ivermectin and levamisole was evaluated by the egg hatch test (EHT). The Bm-HAE was subjected to liquid-liquid chemical separation with ethyl acetate giving two fractions, an aqueous (Bm-Aq) and an organic (Bm-EtOAct). The purification of the bioactive fraction (Bm-EtOAct) through chromatographic separation resulted in four bioactive subfractions (BmR6, BmR7, BmR8 and BmR10). The treatments were designed as follows: Bm-HAE at 800, 1,500, 3,000 and 6,000 μg/mL, and Bm-Aq, Bm-EtOAct and subfractions (BmR6, BmR7, BmR8 and BmR10) at 100, 200, 400 and 800 μg/mL. Two properly negative controls (distilled water and 2% methanol) and thiabendazole (100 μg/mL) as a positive control were used for each bioassay. The chemical identification of the extract, fractions and subfractions was performed through chromatographic processes like open column chromatography, thin-layer chromatography (TLC) and high-performance liquid chromatography (HPLC-PDA). Additionally, the GIN eggs exposed to the bioactive compounds were observed through confocal laser scanning microscopy (CLSM). The Bm-HAE showed 99.5% egg hatching inhibition (EHI) at 6,000 μg/mL with a lethal concentration (LC50) of 1110 μg/mL. The Bm-EtOAc fraction displayed 99.1% EHI at 800 μg/mL with LC50 = 180 μg/mL. The ovicidal activity of the four subfractions was similar at 800 μg/mL: BmR6 (92% EHI); BmR7 (100% EHI); BmR8 (97.8%); and BmR10 (99.1%). The HPLC-PDA analysis of the bioactive subfractions allowed identification of p-coumaric acid, ferulic acid and coumarin derivatives as major compounds. The CLSM analysis allowed observation of morphological alterations in unhatched larvae caused by bioactive compounds present in the Bm-EtOAc and BmR10. In addition, the flavonoids eriodyctiol, luteolin and cynaroside were described for the first time for B. montalvoana.
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Mahmoud AM, Sayed AM, Ahmed OS, Abdel-Daim MM, Hassanein EHM. The role of flavonoids in inhibiting IL-6 and inflammatory arthritis. Curr Top Med Chem 2022; 22:746-768. [PMID: 34994311 DOI: 10.2174/1568026622666220107105233] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/21/2021] [Accepted: 10/28/2021] [Indexed: 11/22/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease that primarily affects the synovial joints. RA has well-known clinical manifestations and can cause progressive disability and premature death along with socioeconomic burdens. Interleukin-6 (IL-6) has been implicated in the pathology of RA where it can stimulate pannus formation, osteoclastogenesis, and oxidative stress. Flavonoids are plant metabolites with beneficial pharmacological effects, including anti-inflammatory, antioxidant, antidiabetic, anticancer, and others. Flavonoids are polyphenolic compounds found in a variety of plants, vegetables, and fruits. Many flavonoids have demonstrated anti-arthritic activity mediated mainly through the suppression of pro-inflammatory cytokines. This review thoroughly discusses the accumulate data on the role of flavonoids on IL-6 in RA.
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Affiliation(s)
- Ayman M Mahmoud
- Physiology Division, Zoology Department, Faculty of Science, Beni-Suef University, Egypt
| | - Ahmed M Sayed
- Biochemistry Laboratory, Chemistry Department, Faculty of Science, Assiut University, Egypt
| | - Osama S Ahmed
- Faculty of Pharmacy, Al-Azhar University-Assiut Branch, Egypt
| | - Mohamed M Abdel-Daim
- Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Egypt
| | - Emad H M Hassanein
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Al-Azhar University-Assiut Branch, Egypt
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da Silva LC, Viganó J, de Souza Mesquita LM, Dias ALB, de Souza MC, Sanches VL, Chaves JO, Pizani RS, Contieri LS, Rostagno MA. Recent advances and trends in extraction techniques to recover polyphenols compounds from apple by-products. FOOD CHEMISTRY-X 2021; 12:100133. [PMID: 34632369 PMCID: PMC8493574 DOI: 10.1016/j.fochx.2021.100133] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/03/2021] [Accepted: 09/22/2021] [Indexed: 12/24/2022]
Abstract
Apple by-products are a source of phenolic compounds associated with bioactivities. Apple processing industries generate by-products that could be better used. This work provides an up-to-date literature overview on extraction techniques. Gaps and future trends related to apple by-products are critically presented.
Apple is one of the most consumed fruits worldwide and has recognized nutritional properties. Besides being consumed fresh, it is the raw material for several food products, whose production chain generates a considerable amount of by-products that currently have an underestimated use. These by-products are a rich source of chemical compounds with several potential applications. Therefore, new ambitious platforms focused on reusing are needed, targeting a process chain that achieves well-defined products and mitigates waste generation. This review covers an essential part of the apple by-products reuse chain. The apple composition regarding phenolic compounds subclasses is addressed and related to biological activities. The extraction processes to recover apple biocompounds have been revised, and an up-to-date overview of the scientific literature on conventional and emerging extraction techniques adopted over the past decade is reported. Finally, gaps and future trends related to the management of apple by-products are critically presented.
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Affiliation(s)
- Laise C da Silva
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
| | - Juliane Viganó
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
| | - Leonardo M de Souza Mesquita
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
| | - Arthur L Baião Dias
- Laboratory of High Pressure in Food Engineering, School of Food Engineering (FEA), University of Campinas (UNICAMP), Rua Monteiro Lobato 80, 13083-862 Campinas, SP, Brazil
| | - Mariana C de Souza
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
| | - Vitor L Sanches
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
| | - Jaisa O Chaves
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
| | - Rodrigo S Pizani
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
| | - Leticia S Contieri
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
| | - Mauricio A Rostagno
- Multidisciplinary Laboratory of Food and Health (LabMAS), School of Applied Sciences (FCA), University of Campinas (UNICAMP), Rua Pedro Zaccaria 1300, 13484-350 Limeira, SP, Brazil
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Helesbeux JJ, Carro L, McCarthy FO, Moreira VM, Giuntini F, O’Boyle N, Matthews SE, Bayraktar G, Bertrand S, Rochais C, Marchand P. 29th Annual GP2A Medicinal Chemistry Conference. Pharmaceuticals (Basel) 2021; 14:ph14121278. [PMID: 34959677 PMCID: PMC8708472 DOI: 10.3390/ph14121278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 11/18/2021] [Indexed: 11/16/2022] Open
Abstract
The 29th Annual GP2A (Group for the Promotion of Pharmaceutical chemistry in Academia) Conference was a virtual event this year due to the COVID-19 pandemic and spanned three days from Wednesday 25 to Friday 27 August 2021. The meeting brought together an international delegation of researchers with interests in medicinal chemistry and interfacing disciplines. Abstracts of keynote lectures given by the 10 invited speakers, along with those of the 8 young researcher talks and the 50 flash presentation posters, are included in this report. Like previous editions, the conference was a real success, with high-level scientific discussions on cutting-edge advances in the fields of pharmaceutical chemistry.
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Affiliation(s)
| | - Laura Carro
- School of Pharmacy, University College London, London WC1N 1AX, UK;
| | - Florence O. McCarthy
- School of Chemistry, Analytical and Biological Chemistry Research Facility, University College Cork, College Road, T12 K8AF Cork, Ireland;
| | - Vânia M. Moreira
- Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal;
- Center for Neuroscience and Cell Biology, Faculty of Medicine, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal
| | - Francesca Giuntini
- School of Pharmacy and Biomolecular Sciences, Byrom Street Campus, Liverpool John Moores University, Liverpool L3 3AF, UK;
| | - Niamh O’Boyle
- School of Pharmacy and Pharmaceutical Sciences, Panoz Institute, Trinity College Dublin, D02 R590 Dublin, Ireland;
| | - Susan E. Matthews
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK;
| | - Gülşah Bayraktar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ege University, Izmir 35100, Turkey;
| | - Samuel Bertrand
- Institut des Substances et Organismes de la Mer, ISOmer, Nantes Université, UR 2160, F-44000 Nantes, France;
| | - Christophe Rochais
- UNICAEN, CERMN (Centre d’Etudes et de Recherche sur le Médicament de Normandie), Normandie Univ., F-14032 Caen, France;
| | - Pascal Marchand
- Cibles et Médicaments des Infections et du Cancer, IICiMed, Nantes Université, UR 1155, F-44000 Nantes, France
- Correspondence: ; Tel.: +33-253-009-155
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Plants Secondary Metabolites as Blood Glucose-Lowering Molecules. Molecules 2021; 26:molecules26144333. [PMID: 34299610 PMCID: PMC8307461 DOI: 10.3390/molecules26144333] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/06/2021] [Accepted: 07/07/2021] [Indexed: 02/06/2023] Open
Abstract
Recently, significant advances in modern medicine and therapeutic agents have been achieved. However, the search for effective antidiabetic drugs is continuous and challenging. Over the past decades, there has been an increasing body of literature related to the effects of secondary metabolites from botanical sources on diabetes. Plants-derived metabolites including alkaloids, phenols, anthocyanins, flavonoids, stilbenoids, saponins, tannins, polysaccharides, coumarins, and terpenes can target cellular and molecular mechanisms involved in carbohydrate metabolism. In addition, they can grant protection to pancreatic beta cells from damage, repairing abnormal insulin signaling, minimizing oxidative stress and inflammation, activating AMP-activated protein kinase (AMPK), and inhibiting carbohydrate digestion and absorption. Studies have highlighted many bioactive naturally occurring plants' secondary metabolites as candidates against diabetes. This review summarizes the current knowledge compiled from the latest studies published during the past decade on the mechanism-based action of plants-derived secondary metabolites that can target various metabolic pathways in humans against diabetes. It is worth mentioning that the compiled data in this review will provide a guide for researchers in the field, to develop candidates into environment-friendly effective, yet safe antidiabetics.
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Magozwi DK, Dinala M, Mokwana N, Siwe-Noundou X, Krause RWM, Sonopo M, McGaw LJ, Augustyn WA, Tembu VJ. Flavonoids from the Genus Euphorbia: Isolation, Structure, Pharmacological Activities and Structure-Activity Relationships. Pharmaceuticals (Basel) 2021; 14:428. [PMID: 34063311 PMCID: PMC8147481 DOI: 10.3390/ph14050428] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 12/16/2022] Open
Abstract
Plants of the genus Euphorbia are widely distributed across temperate, tropical and subtropical regions of South America, Asia and Africa with established Ayurvedic, Chinese and Malay ethnomedical records. The present review reports the isolation, occurrence, phytochemistry, biological properties, therapeutic potential and structure-activity relationship of Euphorbia flavonoids for the period covering 2000-2020, while identifying potential areas for future studies aimed at development of new therapeutic agents from these plants. The findings suggest that the extracts and isolated flavonoids possess anticancer, antiproliferative, antimalarial, antibacterial, anti-venom, anti-inflammatory, anti-hepatitis and antioxidant properties and have different mechanisms of action against cancer cells. Of the investigated species, over 80 different types of flavonoids have been isolated to date. Most of the isolated flavonoids were flavonols and comprised simple O-substitution patterns, C-methylation and prenylation. Others had a glycoside, glycosidic linkages and a carbohydrate attached at either C-3 or C-7, and were designated as d-glucose, l-rhamnose or glucorhamnose. The structure-activity relationship studies showed that methylation of the hydroxyl groups on C-3 or C-7 reduces the activities while glycosylation loses the activity and that the parent skeletal structure is essential in retaining the activity. These constituents can therefore offer potential alternative scaffolds towards development of new Euphorbia-based therapeutic agents.
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Affiliation(s)
- Douglas Kemboi Magozwi
- Department of Chemistry, Tshwane University of Technology, Pretoria 0001, South Africa; (M.D.); (N.M.); (W.A.A.)
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa;
| | - Mmabatho Dinala
- Department of Chemistry, Tshwane University of Technology, Pretoria 0001, South Africa; (M.D.); (N.M.); (W.A.A.)
| | - Nthabiseng Mokwana
- Department of Chemistry, Tshwane University of Technology, Pretoria 0001, South Africa; (M.D.); (N.M.); (W.A.A.)
| | | | - Rui W. M. Krause
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa;
| | - Molahlehi Sonopo
- Radiochemistry, South African Nuclear Energy Corporation, Pelindaba, Brits R104, South Africa;
| | - Lyndy J. McGaw
- Phytomedicine Programme, Department of Paraclinical Sciences, University of Pretoria, Private Bag X04 Onderstepoort 0110, Pretoria 0001, South Africa;
| | - Wilma A. Augustyn
- Department of Chemistry, Tshwane University of Technology, Pretoria 0001, South Africa; (M.D.); (N.M.); (W.A.A.)
| | - Vuyelwa Jacqueline Tembu
- Department of Chemistry, Tshwane University of Technology, Pretoria 0001, South Africa; (M.D.); (N.M.); (W.A.A.)
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Synthesis, In-vitro evaluation and molecular docking studies of oxoindolin phenylhydrazine carboxamides as potent and selective inhibitors of ectonucleoside triphosphate diphosphohydrolase (NTPDase). Bioorg Chem 2021; 112:104957. [PMID: 34020240 DOI: 10.1016/j.bioorg.2021.104957] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/13/2021] [Accepted: 04/28/2021] [Indexed: 12/13/2022]
Abstract
Members of the ectonucleoside triphosphate diphosphohydrolases (NTPDases) constitute the major family of enzymes responsible for the maintenance of extracellular levels of nucleotides and nucleosides by catalyzing the hydrolysis of nucleoside triphosphate (NTP) and nucleoside diphosphates (NDP) to nucleoside monophosphate (NMP). Although, NTPDase inhibitors can act as potential drug candidates for the treatment of various diseases, there is lack of potent as well as selective inhibitors of NTPDases. The current study describes the synthesis of a number of carboxamide derivatives that were tested on recombinant human (h) NTPDases. The most promising inhibitors were 2h (h-NTPDase1, IC50: 0.12 ± 0.03 µM), 2d (h-NTPDase2, IC50: 0.15 ± 0.01 µM) and 2a (h-NTPDase3, IC50: 0.30 ± 0.04 µM; h-NTPDase8, IC50: 0.16 ± 0.02 µM). Four compounds (2e, 2f, 2g and 2h) were associated with the selective inhibition of h-NTPDase1 while 2b was identified as a selective h-NTPDase3 inhibitor. Considering the importance of NTPDase3 in the regulation of insulin release, the NTPDase3 inhibitors were further investigated to elucidate their role in the insulin release. The obtained data suggested that compound 2a was actively participating in regulating the insulin release without producing any effect on NTPDase3 mRNA. Moreover, the most potent inhibitors were docked within the active site of respective enzyme and the observed interactions were in compliance with in vitro results. Hence, these compounds can be used as pharmacological tool to further investigate the role of NTPDase3 coupled to insulin release.
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Lv F, Du Q, Li L, Xi X, Liu Q, Li W, Liu S. Eriodictyol inhibits glioblastoma migration and invasion by reversing EMT via downregulation of the P38 MAPK/GSK-3β/ZEB1 pathway. Eur J Pharmacol 2021; 900:174069. [PMID: 33811837 DOI: 10.1016/j.ejphar.2021.174069] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022]
Abstract
Eriodictyol (ERD) is a natural flavonoid that exists in many vegetables and fruits, especially citrus fruits. It has been proven to have many pharmacological effects, such as antioxidative, anti-inflammatory and neuroprotective effects. Our previous study showed that eriodictyol could inhibit the proliferation and induce the apoptosis of glioblastoma cells by downregulating the PI3K/Akt/NF-κB pathway and restraining its migration and invasion. However, the mechanism by which eriodictyol prevents glioblastoma metastasis is still unknown. Epithelial-mesenchymal transition (EMT) is a key process for many cancer metastases; it also confers locomotivity to tumor cells, including glioblastoma. In this study, we found that eriodictyol can suppress the migration and invasion of glioblastoma A172 and U87 MG cell lines by suppressing the EMT markers - N-cadherin and E-cadherin through Wound healing and Transwell assays, Western blot, RT-qPCR, immunofluorescence and immunohistochemistry. Further research revealed that the mechanism could be connected with downregulation of the P38 MAPK/GSK-3β/ZEB1 signaling pathway. These findings can provide a new idea for the treatment of glioblastoma.
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Affiliation(s)
- Feng Lv
- Department of Pharmacy, The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, 401120, PR China
| | - Qian Du
- Department of Pharmacy, The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, 401120, PR China
| | - Lin Li
- Department of Pharmacy, The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, 401120, PR China
| | - Xin Xi
- Department of Pharmacy, The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, 401120, PR China
| | - Qinglong Liu
- Department of Pharmacy, The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, 401120, PR China
| | - Wenjun Li
- Department of Pharmacy, The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, 401120, PR China.
| | - Songqing Liu
- Department of Pharmacy, The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, 401120, PR China.
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Al Duhaidahawi D, Hasan SA, Al Zubaidy HFS. Flavonoids in the Treatment of Diabetes: Clinical Outcomes and Mechanism to Ameliorate Blood Glucose Levels. Curr Diabetes Rev 2021; 17:e120720188794. [PMID: 33290200 DOI: 10.2174/1573399817666201207200346] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 09/25/2020] [Accepted: 10/08/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND For thousands of years, natural food products have been used as a medicine for treating diseases that affect the human body, including diabetes mellitus (DM). Lately, several investigations have been performed on the flavonoid derivatives of plant origin, and their biological activity has been extensively studied. METHODS Given our need to know more mechanisms for treating DM, we performed a thorough research review on treating diabetes mellitus based on flavonoids, their therapeutic potential, and biological action. RESULTS Flavonoids reduce complications in addition to their vital role as effective supplements for preventing diabetes mellitus by regulating glucose metabolism, lipid profile, liver enzyme activity, a protein kinase inhibitor, PPAR, and AMPK with NF-κB. CONCLUSION The articles that we reviewed showed the positive role of flavonoids, which in a certain way reduce diabetes, but their side effects still need to be studied further.This review is focused on describing the different types of dietary flavonoids along with their mechanisms of reducing blood glucose and enhancing insulin sensitivity, as well as their side effects.
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Affiliation(s)
- Dunya Al Duhaidahawi
- Faculty of Pharmacy, Department of Pharmacognacy, University of Kufa, AL-Najaf, Iraq
| | - Samer A Hasan
- Pharmacognacy, Pharmacy, University of Kufa, AL-Najaf, Iraq
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Pharmacological Activity of Eriodictyol: The Major Natural Polyphenolic Flavanone. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:6681352. [PMID: 33414838 PMCID: PMC7752289 DOI: 10.1155/2020/6681352] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/01/2020] [Accepted: 12/02/2020] [Indexed: 01/17/2023]
Abstract
Eriodictyol is a flavonoid that belongs to a subclass of flavanones and is widespread in citrus fruits, vegetables, and medicinally important plants. Eriodictyol has been anticipated to explain the method of its activity via multiple cellular signaling cascades. Eriodictyol is an effective natural drug source to maintain higher health standards due to its excellent therapeutic roles in neuroprotection, cardioprotective activity, hepatoprotective activity, antidiabetes and obesity, and skin protection and having highly analgesic, antioxidant, and anti-inflammatory effects, antipyretic and antinociceptive actions, antitumor activity, and much more. This review aims to highlight the modes of action of eriodictyol against various diseases via multiple cellular signaling pathways.
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Afzal S, Al-Rashida M, Hameed A, Pelletier J, Sévigny J, Iqbal J. Functionalized Oxoindolin Hydrazine Carbothioamide Derivatives as Highly Potent Inhibitors of Nucleoside Triphosphate Diphosphohydrolases. Front Pharmacol 2020; 11:585876. [PMID: 33328992 PMCID: PMC7734281 DOI: 10.3389/fphar.2020.585876] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/13/2020] [Indexed: 12/13/2022] Open
Abstract
Ectonucleoside triphosphate diphosphohydrolases (NTPDases) are ectoenzymes that play an important role in the hydrolysis of nucleoside triphosphate and diphosphate to nucleoside monophosphate. NTPDase1, -2, -3 and -8 are the membrane bound members of this enzyme family that are responsible for regulating the levels of nucleotides in extracellular environment. However, the pathophysiological functions of these enzymes are not fully understood due to lack of potent and selective NTPDase inhibitors. Herein, a series of oxoindolin hydrazine carbothioamide derivatives is synthesized and screened for NTPDase inhibitory activity. Four compounds were identified as selective inhibitors of h-NTPDase1 having IC50 values in lower micromolar range, these include compounds 8b (IC50 = 0.29 ± 0.02 µM), 8e (IC50 = 0.15 ± 0.009 µM), 8f (IC50 = 0.24 ± 0.01 µM) and 8l (IC50 = 0.30 ± 0.03 µM). Similarly, compound 8k (IC50 = 0.16 ± 0.01 µM) was found to be a selective h-NTPDase2 inhibitor. In case of h-NTPDase3, most potent inhibitors were compounds 8c (IC50 = 0.19 ± 0.02 µM) and 8m (IC50 = 0.38 ± 0.03 µM). Since NTPDase3 has been reported to be associated with the regulation of insulin secretion, we evaluated our synthesized NTPDase3 inhibitors for their ability to stimulate insulin secretion in isolated mice islets. Promising results were obtained showing that compound 8m potently stimulated insulin secretion without affecting the NTPDase3 gene expression. Molecular docking studies of the most potent compounds were also carried out to rationalize binding site interactions. Hence, these compounds are useful tools to study the role of NTPDase3 in insulin secretion.
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Affiliation(s)
- Saira Afzal
- Centre for Advanced Drug Research, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
| | - Mariya Al-Rashida
- Department of Chemistry, Forman Christian College (A Chartered University), Lahore, Pakistan
| | - Abdul Hameed
- Centre for Advanced Drug Research, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
| | - Julie Pelletier
- Centre de Recherche du CHU de Québec-Université Laval, Québec City, QC, Canada
| | - Jean Sévigny
- Centre de Recherche du CHU de Québec-Université Laval, Québec City, QC, Canada.,Département de Microbiologie-Infectiologie et d'Immunologie, Faculté de Médecine, Université Laval, Québec City, QC, Canada
| | - Jamshed Iqbal
- Centre for Advanced Drug Research, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
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Abstract
Polyphenols constitute a diverse array of naturally occurring secondary metabolites found in plants which, when consumed, have been shown to promote human health. Greater consumption may therefore aid in the fight against diseases such as obesity, diabetes, heart disease, cancer, etc. Tree bark is polyphenol-rich and has potential to be used in food supplements. However, it is important to gain insight into the polyphenol profile of different barks to select the material with greatest concentration and diversity. Ultra-performance liquid chromatography (UPLC) was coupled with an ion mobility time-of-flight high-definition/high-resolution mass spectrometer (UPLC-HDMSE) to profile ethanol extracts of three common tree barks (Pinus contorta, Pinus sylvestris, Quercus robur) alongside a commercial reference (Pycnogenol® extracted from Pinus pinaster). Through the use of Progenesis QI informatics software, 35 high scoring components with reported significance to health were tentatively identified across the three bark extracts following broadly the profile of Pycnogenol®. Scots Pine had generally higher compound abundances than in the other two extracts. Oak bark extract showed the lowest abundances but exhibited higher amounts of naringenin and 3-O-methylrosmarinic acid. We conclude that forestry bark waste provides a rich source of extractable polyphenols suitable for use in food supplements and so can valorise this forestry waste stream.
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Zhang H, Zheng X, Zheng G, Teng Y, Zhou J, Yao G. Chemical constituents from the leaves of Lyonia ovalifolia var. hebecarpa. BIOCHEM SYST ECOL 2020. [DOI: 10.1016/j.bse.2020.104129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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The pharmacological and biological roles of eriodictyol. Arch Pharm Res 2020; 43:582-592. [PMID: 32594426 DOI: 10.1007/s12272-020-01243-0] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 06/24/2020] [Indexed: 12/25/2022]
Abstract
Eriodictyol is a flavonoid in the flavanones subclass. It is abundantly present in a wide range of medicinal plants, citrus fruits, and vegetables that are considered to have potential health importance. Having the considerable medicinal properties, eriodictyol has been predicted to clarify the mode of action in various cellular and molecular pathways. Evidence for the existing therapeutic roles of eriodictyol includes antioxidant, anti-inflammatory, anti-cancer, neuroprotective, cardioprotective, anti-diabetic, anti-obesity, hepatoprotective, and miscellaneous. Therefore, this review aims to present the recent evidence regarding the mechanisms of action of eriodictyol in different signaling pathways in a specific disease condition. In view of the immense therapeutic effects, eriodictyol may serve as a potential drug source to enhance community health standards.
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Ahmed S, Nur-E-Alam M, Parveen I, Coles SJ, Hafizur RM, Hameed A, Orton JB, Threadgill MD, Yousaf M, Alqahtani AM, Al-Rehaily AJ. Stimulation of insulin secretion by 5-methylcoumarins and its sulfur analogues isolated from Clutia lanceolata Forssk. PHYTOCHEMISTRY 2020; 170:112213. [PMID: 31786408 DOI: 10.1016/j.phytochem.2019.112213] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/14/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
Clutia lanceolata Forssk. (C. lanceolata) is a medicinal plant native to sub-Saharan Africa and the Arabian Peninsula. Phytochemical investigation of the aerial parts of C. lanceolata yielded twenty-one coumarins including methylthio and methylsulfinyl-coumarins. Thirteen of these compounds are reported here for the first time, named as cluteolin A to M. The remaining eight compounds are known but have not been associated previously with C. lanceolata. The structures of the undescribed compounds were elucidated from their 2D NMR and MS spectra. Single crystal X-ray analyses confirmed the structures of eleven compounds. As, in Saudi Arabian tradition, C. lanceolata has been reported to have anti-diabetic and anti-fungal properties, the coumarins were examined for their biological activity. Seven compounds strongly enhanced the glucose-triggered release of insulin by murine pancreatic islets, with two compounds showing more than two-fold enhancement of insulin secretion, compared with the standard drug glimepiride.
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Affiliation(s)
- Sarfaraz Ahmed
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Mohammad Nur-E-Alam
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Ifat Parveen
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth, SY23 3DA, United Kingdom
| | - Simon J Coles
- UK National Crystallography Service, School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, United Kingdom
| | - Rahman M Hafizur
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Abdul Hameed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - James B Orton
- UK National Crystallography Service, School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, United Kingdom
| | - Michael D Threadgill
- Institute of Biological, Environmental & Rural Sciences (IBERS), Aberystwyth University, Aberystwyth, SY23 3DA, United Kingdom; Department of Pharmacy & Pharmacology, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom
| | - Muhammad Yousaf
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Abdulaziz M Alqahtani
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Adnan J Al-Rehaily
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia.
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Dinda B, Dinda M, Roy A, Dinda S. Dietary plant flavonoids in prevention of obesity and diabetes. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2019; 120:159-235. [PMID: 32085882 DOI: 10.1016/bs.apcsb.2019.08.006] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Obesity and diabetes are the most prevailing chronic metabolic diseases worldwide from mainly lipid and glucose metabolic dysfunctions and their incidence is increasing at an alarming high rate. Obesity is characterized by excess fat accumulation in WAT and liver and is the central player of insulin resistance in the peripheral tissues from chronic inflammation, lipotoxicity and gut dysbiosis, and plays a key role for development of type 2 diabetes (T2DM) and vascular diseases. Diabetes mellitus, known as diabetes, is chiefly characterized by hyperglycaemia from impaired insulin secretion and insulin resistance. Several identified mutant genes in insulin secretion and resistance and various environmental factors are considered responsible for the onset of this disease. Currently available oral synthetic drugs, biguanides, incretin mimetic, GLP-1R and PPAR agonists and DPP-4 inhibitors for management of obesity and diabetes have several adverse effects in patients on long-term use. Emerging evidence supports the efficacy of dietary plant flavonoids in prevention and attenuation of obesity and diabetes by the protection and proliferation of pancreatic beta-cells and improvement of their insulin secretory function via activation of cAMP/PKA signaling pathway as well as in the improvement of insulin sensitivity in the peripheral metabolic tisssues for glucose uptake and utilization via inhibition of inflammation, lipotoxicity and oxidative stress. These flavonoids improve GLUT-4 expression and translocation to plasma membrane by activation of insulin-sensitive PI3K/Akt signaling and insulin-independent AMPK, SIRT-1 and MOR activation pathways for regulation of glucose homeostasis, and improve fat oxidation and reduce lipid synthesis by regulation of related genes for lipid homeostasis in the body of obese diabetic animals. In this chapter, we have highlighted all these beneficial anti-obesity and antidiabetic potentials of some dietary plant flavonoids along with their molecular actions, bioavailability and pharmacokinetics. In addition, the present understanding and management of obesity and diabetes are also focused.
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Affiliation(s)
- Biswanath Dinda
- Department of Chemistry, Tripura University, Agartala, Tripura, India
| | - Manikarna Dinda
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, United States
| | - Arup Roy
- Chemical Science & Technology Division, CSIR - North East Institute of Science and Technology, Jorhat, Assam, India
| | - Subhajit Dinda
- Department of Chemistry, Dasaratha Deb Memorial College, Khowai, Tripura, India
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Hameed A, Raza SA, Israr Khan M, Baral J, Adhikari A, Nur-E-Alam M, Ahmed S, Al-Rehaily AJ, Ashraf S, Ul-Haq Z, Hafizur RM. Tambulin from Zanthoxylum armatum acutely potentiates the glucose-induced insulin secretion via K ATP-independent Ca 2+-dependent amplifying pathway. Biomed Pharmacother 2019; 120:109348. [PMID: 31629954 DOI: 10.1016/j.biopha.2019.109348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/30/2019] [Accepted: 08/07/2019] [Indexed: 12/30/2022] Open
Abstract
Tambulin, a flavonol isolated from Zanthoxylum armatum, showed potent insulin secretory activity in our preliminary anti-diabetic screening. Here, we explored the insulin secretory mechanism(s) of tambulin focusing in glucose-dependent, KATP ‒ and Ca2+‒channels dependent, and cAMP-PKA pathways. Mice islets and MIN6 cells were incubated with tambulin in the presence of pharmacological agonists/antagonists and the secreted insulin was measured using mouse insulin ELISA kit. The intracellular cAMP was measured by an acetylation cAMP ELISA kit. Tambulin (200 μM) showed potent insulin secretory activity only at stimulatory glucose (11-25 mM) concentrations; however, no change in insulin release was observed at basal glucose both in mice islets and MIN6 cells. Notably, in the presence of diazoxide, a KATP channel opener; the incomplete inhibition of tambulin-induced insulin secretion was observed whereas, complete inhibition was found using verapamil, an L-type Ca2+ channel blocker. Furthermore, the insulinotropic potential of tambulin was amplified in tolbutamide treated, and depolarized islets suggest tambulin's target other than tolbutamide. Tambulin showed no additive effect in the IBMX-induced intracellular cAMP; whereas, exerted an additive effect in the IBMX-induced insulin secretion. Furthermore, tambulin-induced insulin secretion was dramatically inhibited by PKA inhibitor (H-89), while moderate inhibition was found by using PKC inhibitor (calphostin C). Molecular docking studies also showed the best binding affinities of tambulin with PKA suggest the PKA dependent signaling cascade is involved more in tambulin-induced insulin secretion. Based on these findings, it is concluded that tambulin stimulates insulin secretion in a Ca2+ channel-dependent but KATP channel-independent manner, most likely by activating the cAMP-PKA pathway.
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Affiliation(s)
- Abdul Hameed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Centre for Advanced Drug Research (CADR), COMSATS University Islamabad (CUI), Abbottabad 22060, Pakistan
| | - Sayed Ali Raza
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - M Israr Khan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Janaki Baral
- Central Department of Chemistry, Tribhuvan University, Kathmandu, Nepal
| | - Achyut Adhikari
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Central Department of Chemistry, Tribhuvan University, Kathmandu, Nepal
| | - Mohammad Nur-E-Alam
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box. 2457, Riyadh 11451, Saudi Arabia
| | - Sarfaraz Ahmed
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box. 2457, Riyadh 11451, Saudi Arabia
| | - Adnan J Al-Rehaily
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box. 2457, Riyadh 11451, Saudi Arabia
| | - Sajda Ashraf
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Zaheer Ul-Haq
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Rahman M Hafizur
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
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Al-Ishaq RK, Abotaleb M, Kubatka P, Kajo K, Büsselberg D. Flavonoids and Their Anti-Diabetic Effects: Cellular Mechanisms and Effects to Improve Blood Sugar Levels. Biomolecules 2019; 9:E430. [PMID: 31480505 PMCID: PMC6769509 DOI: 10.3390/biom9090430] [Citation(s) in RCA: 263] [Impact Index Per Article: 52.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/14/2019] [Accepted: 08/22/2019] [Indexed: 12/19/2022] Open
Abstract
Diabetes mellitus (DM) is a prevailing global health metabolic disorder, with an alarming incidence rate and a huge burden on health care providers. DM is characterized by the elevation of blood glucose due either to a defect in insulin synthesis, secretion, binding to receptor, or an increase of insulin resistance. The internal and external factors such as obesity, urbanizations, and genetic mutations could increase the risk of developing DM. Flavonoids are phenolic compounds existing as secondary metabolites in fruits and vegetables as well as fungi. Their structure consists of 15 carbon skeletons and two aromatic rings (A and B) connected by three carbon chains. Flavonoids are furtherly classified into 6 subclasses: flavonols, flavones, flavanones, isoflavones, flavanols, and anthocyanidins. Naturally occurring flavonoids possess anti-diabetic effects. As in vitro and animal model's studies demonstrate, they have the ability to prevent diabetes and its complications. The aim of this review is to summarize the current knowledge addressing the antidiabetic effects of dietary flavonoids and their underlying molecular mechanisms on selected pathways: Glucose transporter, hepatic enzymes, tyrosine kinase inhibitor, AMPK, PPAR, and NF-κB. Flavonoids improve the pathogenesis of diabetes and its complications through the regulation of glucose metabolism, hepatic enzymes activities, and a lipid profile. Most studies illustrate a positive role of specific dietary flavonoids on diabetes, but the mechanisms of action and the side effects need more clarification. Overall, more research is needed to provide a better understanding of the mechanisms of diabetes treatment using flavonoids.
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Affiliation(s)
- Raghad Khalid Al-Ishaq
- Department of Physiology and Biophysics, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha 24144, Qatar
| | - Mariam Abotaleb
- Department of Physiology and Biophysics, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha 24144, Qatar
| | - Peter Kubatka
- Department of Medical Biology and Department of Experimental Carcinogenesis, Division of Oncology, Biomedical Center Martin, Jessenius Faculty of Medicine, Comenius University in Bratislava, 03601 Martin, Slovak Republic
| | - Karol Kajo
- Department of Pathology, St. Elizabeth Cancer Institute Hospital, 81250 Bratislava, Slovak Republic
- Biomedical Research Centre, Slovak Academy of Sciences, 81439 Bratislava, Slovak Republic
| | - Dietrich Büsselberg
- Department of Physiology and Biophysics, Weill Cornell Medicine-Qatar, Education City, Qatar Foundation, Doha 24144, Qatar.
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Bai J, Wang Y, Zhu X, Shi J. Eriodictyol inhibits high glucose-induced extracellular matrix accumulation, oxidative stress, and inflammation in human glomerular mesangial cells. Phytother Res 2019; 33:2775-2782. [PMID: 31373419 DOI: 10.1002/ptr.6463] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 05/24/2019] [Accepted: 07/11/2019] [Indexed: 12/16/2022]
Abstract
Diabetic nephropathy (DN) is one of the major complications of diabetes mellitus. The progression of DN has been found to be associated with high glucose (HG)-induced oxidative stress and inflammation in diabetes mellitus. Eriodictyol is a flavonoid that possesses antioxidant and anti-inflammatory effects. However, the effect of eriodictyol on DN remains unknown. In the present study, we evaluated the role of eriodictyol in mesangial cells (MCs) in response to HG condition. The results showed that eriodictyol repressed cell proliferation of HG-stimulated MCs. Treatment with eriodictyol attenuated oxidative stress, which was evidenced by increased superoxide dismutase activity as well as decreased production of reactive oxygen species (ROS) and malondialdehyde. Besides, eriodictyol suppressed the expressions of two NADPH oxidase (NOX) isoforms, NOX2 and NOX4, which are responsible for the generation of ROS. Eriodictyol suppressed the production of extracellular matrix proteins including fibronectin and Collagen IV, as well as the secretion of inflammatory cytokines including TNF-α, IL-1β, and IL-6 in HG-induced MCs. Moreover, the HG-induced activation of Akt/NF-κB pathway was mitigated by eriodictyol. In conclusion, eriodictyol protected MCs from HG stimulation though inhibition of Akt/NF-κB pathway.
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Affiliation(s)
- Jin Bai
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, China
| | - Yi Wang
- Department of Cardiothoracic and Vascular Surgery, Huaihe Hospital of Henan University, Kaifeng, China
| | - Xiaoguang Zhu
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, China
| | - Jun Shi
- Department of Nephrology, Huaihe Hospital of Henan University, Kaifeng, China
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27
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Hammadi R, Kúsz N, Mwangi PW, Kulmány Á, Zupkó I, Orvos P, Tálosi L, Hohmann J, Vasas A. Isolation and Pharmacological Investigation of Compounds From Euphorbia matabelensis. Nat Prod Commun 2019. [DOI: 10.1177/1934578x19863509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This work deals with the isolation and pharmacological investigations of compounds of Euphorbia matabelensis. After multiple separation process, including thin layer chromatography (TLC), vacuum liquid chromatography, preparative TLC, and high-performance liquid chromatography, 1 diterpene (ingenol) and 2 flavonoids (naringenin and eriodictyol) were obtained from the methanol extracts prepared from the stems and roots of the plant. The structures of the isolated compounds were determined by nuclear magnetic resonance (NMR) and MS measurements and comparison with literature data. All compounds were isolated for the first time from the plant. Eriodictyol was detected for the first time from a Euphorbia species. The compounds were tested for their antiproliferative (on HeLa, C33a, MCF-7, and MDA-MB-231 cell lines) and GIRK channel blocking activities. None of the compounds proved to be active in these test systems.
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Affiliation(s)
- Reham Hammadi
- Department of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Hungary
| | - Norbert Kúsz
- Department of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Hungary
| | | | - Ágnes Kulmány
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Hungary
| | - István Zupkó
- Department of Pharmacodynamics and Biopharmacy, University of Szeged, Hungary
| | - Péter Orvos
- Department of Ophthalmology, University of Szeged, Hungary
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Hungary
| | - László Tálosi
- Department of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Hungary
| | - Judit Hohmann
- Department of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Hungary
- Interdisciplinary Centre of Natural Products, University of Szeged, Hungary
| | - Andrea Vasas
- Department of Pharmacognosy, Interdisciplinary Excellence Centre, University of Szeged, Hungary
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Hameed A, Hafizur RM, Khan MI, Jawed A, Wang H, Zhao M, Matsunaga K, Izumi T, Siddiqui S, Khan F, Adhikari A, Sharma KR. Coixol amplifies glucose-stimulated insulin secretion via cAMP mediated signaling pathway. Eur J Pharmacol 2019; 858:172514. [PMID: 31265841 DOI: 10.1016/j.ejphar.2019.172514] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 06/25/2019] [Accepted: 06/28/2019] [Indexed: 12/20/2022]
Abstract
Recently, we reported the role of coixol (6-methoxy-2(3H)-benzoxazolone), an alkaloid from Scoparia dulcis, in glucose-dependent insulin secretion; however, its insulin secretory mechanism(s) remained unknown. Here, we explored the insulinotropic mechanism(s) of coixol in vitro and in vivo. Mice islets were batch incubated, perifused with coixol in the presence of agonists/antagonists, and insulin secretion was measured by ELISA. Intracellular cAMP levels were measured using enzyme immunoassay. K+- and Ca2+-currents were recorded in MIN6 cells using whole-cell patch-clamp technique. The in vivo glucose tolerance and the insulinogenic index were evaluated in diabetic rats treated with coixol at 25 and 50 mg/kg, respectively. Coixol, unlike sulfonylurea, enhanced insulin secretion in batch incubated and perifused islets at high glucose, with no effect at basal glucose concentrations. Coixol showed no pronounced effect on the inward rectifying K+- and Ca2+-currents in whole-cell patch recordings. Moreover, coixol-induced insulin secretion was further amplified in the depolarized islets. Coixol showed an additive effect with forskolin (10 μM)-induced cAMP level, and in insulin secretion; however, no additive effect was observed with isobutylmethylxanthine (IBMX, 100 μM)-induced cAMP level, nor in insulin secretion. The PKA inhibitor H-89 (50 μM), and Epac2 inhibitor MAY0132 (50 μM) significantly inhibited the coixol-induced insulin secretion (P < 0.01). Furthermore, insulin secretory kinetics revealed that coixol potentiates insulin secretion in both early and late phases of insulin secretion. In diabetic animals, coixol showed significant improvement in glucose tolerance and on fasting blood glucose levels. These data suggest that coixol amplifies glucose-stimulated insulin secretion by cAMP-mediated signaling pathways.
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Affiliation(s)
- Abdul Hameed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan; Centre for Advanced Drug Research (CADR), COMSATS University Islamabad (CUI), Abbottabad, 22060, Pakistan
| | - Rahman M Hafizur
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan.
| | - M Israr Khan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Abira Jawed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Hao Wang
- Laboratory of Molecular Endocrinology and Metabolism, Department of Molecular Medicine, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan
| | - Miaomiao Zhao
- Laboratory of Molecular Endocrinology and Metabolism, Department of Molecular Medicine, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan
| | - Kohichi Matsunaga
- Laboratory of Molecular Endocrinology and Metabolism, Department of Molecular Medicine, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan
| | - Tetsuro Izumi
- Laboratory of Molecular Endocrinology and Metabolism, Department of Molecular Medicine, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan
| | - Sonia Siddiqui
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Faisal Khan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Achyut Adhikari
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan; Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Khaga Raj Sharma
- Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
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29
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Li L, Feng X, Chen Y, Li S, Sun Y, Zhang L. A comprehensive study of eriocitrin metabolism in vivo and in vitro based on an efficient UHPLC-Q-TOF-MS/MS strategy. RSC Adv 2019; 9:24963-24980. [PMID: 35528661 PMCID: PMC9069865 DOI: 10.1039/c9ra03037a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 08/01/2019] [Indexed: 01/17/2023] Open
Abstract
Eriocitrin, a main flavonoid in lemons, possesses strong antioxidant, lipid-lowering and anticancer activities and has long been used in food, beverages and wine. However, its metabolism in vivo and in vitro is still unclear. In this study, an efficient strategy was developed to detect and identify metabolites of eriocitrin by using ultra-high-performance liquid chromatography coupled with hybrid triple quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS) based on online data acquisition and multiple data processing techniques. A total of 32 metabolites in vivo and 27 metabolites in vitro were obtained based on the above method. Furthermore, the main metabolic pathways of eriocitrin included reduction, hydrogenation, N-acetylation, ketone formation, oxidation, methylation, sulfate conjugation, glutamine conjugation, glycine conjugation, desaturation and demethylation to carboxylic acid. This study will lay a foundation for further studies on the metabolic mechanisms of eriocitrin. 41 metabolites of eriocitrin in vivo and in vitro was identified based on the efficient UHPLC-Q-TOF-MS/MS strategy.![]()
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Affiliation(s)
- Luya Li
- Department of Pharmaceutical Analysis
- School of Pharmacy
- Hebei Medical University
- Shijiazhuang 050017
- P. R. China
| | - Xue Feng
- Department of Pharmaceutical Analysis
- School of Pharmacy
- Hebei Medical University
- Shijiazhuang 050017
- P. R. China
| | - Yuting Chen
- Department of Pharmaceutical Analysis
- School of Pharmacy
- Hebei Medical University
- Shijiazhuang 050017
- P. R. China
| | - Shenghao Li
- Department of Pathobiology and Immunology
- Hebei University of Chinese Medicine
- Shijiazhuang 050000
- P. R. China
| | - Yupeng Sun
- Department of Pharmaceutical Analysis
- School of Pharmacy
- Hebei Medical University
- Shijiazhuang 050017
- P. R. China
| | - Lantong Zhang
- Department of Pharmaceutical Analysis
- School of Pharmacy
- Hebei Medical University
- Shijiazhuang 050017
- P. R. China
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30
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Hameed A, Ashraf S, Israr Khan M, Hafizur RM, Ul-Haq Z. Protein kinase A-dependent insulinotropic effect of selected flavonoids. Int J Biol Macromol 2018; 119:149-156. [DOI: 10.1016/j.ijbiomac.2018.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 06/26/2018] [Accepted: 07/04/2018] [Indexed: 01/21/2023]
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