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Aliper A, Belikov AV, Garazha A, Jellen L, Artemov A, Suntsova M, Ivanova A, Venkova L, Borisov N, Buzdin A, Mamoshina P, Putin E, Swick AG, Moskalev A, Zhavoronkov A. In search for geroprotectors: in silico screening and in vitro validation of signalome-level mimetics of young healthy state. Aging (Albany NY) 2017; 8:2127-2152. [PMID: 27677171 PMCID: PMC5076455 DOI: 10.18632/aging.101047] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 09/10/2016] [Indexed: 12/19/2022]
Abstract
Populations in developed nations throughout the world are rapidly aging, and the search for geroprotectors, or anti-aging interventions, has never been more important. Yet while hundreds of geroprotectors have extended lifespan in animal models, none have yet been approved for widespread use in humans. GeroScope is a computational tool that can aid prediction of novel geroprotectors from existing human gene expression data. GeroScope maps expression differences between samples from young and old subjects to aging-related signaling pathways, then profiles pathway activation strength (PAS) for each condition. Known substances are then screened and ranked for those most likely to target differential pathways and mimic the young signalome. Here we used GeroScope and shortlisted ten substances, all of which have lifespan-extending effects in animal models, and tested 6 of them for geroprotective effects in senescent human fibroblast cultures. PD-98059, a highly selective MEK1 inhibitor, showed both life-prolonging and rejuvenating effects. Natural compounds like N-acetyl-L-cysteine, Myricetin and Epigallocatechin gallate also improved several senescence-associated properties and were further investigated with pathway analysis. This work not only highlights several potential geroprotectors for further study, but also serves as a proof-of-concept for GeroScope, Oncofinder and other PAS-based methods in streamlining drug prediction, repurposing and personalized medicine.
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Affiliation(s)
- Alexander Aliper
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA
| | - Aleksey V Belikov
- Moscow Institute of Physics and Technology, Dolgoprudny, 141700, Russia
| | - Andrew Garazha
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA.,Moscow Institute of Physics and Technology, Dolgoprudny, 141700, Russia.,Center for Biogerontology and Regenerative Medicine, Moscow, 121099, Russia
| | - Leslie Jellen
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA.,Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Artem Artemov
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA
| | - Maria Suntsova
- D. Rogachev Federal Research and Clinical Center for Pediatric Hematology, Oncology, and Immunology, Moscow, 117997, Russia
| | - Alena Ivanova
- D. Rogachev Federal Research and Clinical Center for Pediatric Hematology, Oncology, and Immunology, Moscow, 117997, Russia
| | - Larisa Venkova
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA.,Pathway Pharmaceuticals, Ltd, Hong Kong, Hong Kong
| | - Nicolas Borisov
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA.,Pathway Pharmaceuticals, Ltd, Hong Kong, Hong Kong
| | - Anton Buzdin
- Pathway Pharmaceuticals, Ltd, Hong Kong, Hong Kong
| | - Polina Mamoshina
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA
| | - Evgeny Putin
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA
| | | | - Alexey Moskalev
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA.,Moscow Institute of Physics and Technology, Dolgoprudny, 141700, Russia.,Laboratory of Molecular Radiobiology and Gerontology, Institute of Biology of Komi Science Center of Ural Branch of Russian Academy of Sciences, Syktyvkar, 167982, Russia.,School of Systems Biology, George Mason University (GMU), Fairfax, VA 22030, USA.,Engelhardt Institute of Molecular Biology of Russian Academy of Sciences, Moscow, 119991, Russia
| | - Alex Zhavoronkov
- Insilico Medicine, Inc, Research Department, Baltimore, MD 21218, USA.,The Biogerontology Research Foundation, Oxford, UK
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352
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Myricetin Possesses Potential Protective Effects on Diabetic Cardiomyopathy through Inhibiting I κB α/NF κB and Enhancing Nrf2/HO-1. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:8370593. [PMID: 29147465 PMCID: PMC5632894 DOI: 10.1155/2017/8370593] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/18/2017] [Accepted: 07/26/2017] [Indexed: 12/11/2022]
Abstract
Diabetic cardiomyopathy (DCM) is associated with a greater risk of mortality in patients with diabetes mellitus. Currently, no specific treatment has been suggested for DCM treatment. This study demonstrated that myricetin (M) attenuated DCM-associated cardiac injury in mice subjected to streptozotocin (SZT) and in neonatal rat cardiomyocytes (NRCM) challenged with high glucose. In vivo investigation demonstrated 6 months of M treatment (200 mg/kg/d) significantly alleviated cardiac hypertrophy, apoptosis, and interstitial fibrosis. Mechanically, M treatment significantly increased the activity of Nrf2/HO-1 pathway, strengthening antioxidative stress capacity evidenced by reversed activities of GPx and SOD, and decreased MDA production. M treatment also inhibited IκBα/NF-κB pathway, resulting in reduced secretion of inflammation cytokines including IL-1β, TNF-α, and IL-6. Besides, the TGFβ/Smad3 signaling was also blunted in DCM mice treated with M. These beneficial effects of M treatment protected cardiomyocytes from apoptosis as shown by decreased TUNEL-positive nucleus, c-caspase 3, and Bax. Similar effects of M treatment could be reproduced in NRCM treated with high glucose. Furthermore, through silencing Nrf2 in NRCM, we found that the regulation of IκBα/NFκB by M was independent on its function on Nrf2. Thus, we concluded that M possesses potential protective effects on DCM through inhibiting IκBα/NFκB and enhancing Nrf2/HO-1.
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353
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Mureşan-Pop M, Pop M, Borodi G, Todea M, Nagy-Simon T, Simon S. Solid dispersions of Myricetin with enhanced solubility: Formulation, characterization and crystal structure of stability-impeding Myricetin monohydrate crystals. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.04.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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354
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Myricetin improves endurance capacity and mitochondrial density by activating SIRT1 and PGC-1α. Sci Rep 2017; 7:6237. [PMID: 28740165 PMCID: PMC5524912 DOI: 10.1038/s41598-017-05303-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 05/26/2017] [Indexed: 01/07/2023] Open
Abstract
Robust mitochondrial respiration provides energy to support physical performance and physiological well-being, whereas mitochondrial malfunction is associated with various pathologies and reduced longevity. In the current study, we tested whether myricetin, a natural flavonol with diverse biological activities, may impact mitochondrial function and longevity. The mice were orally administered myricetin (50 mg/kg/day) for 3 weeks. Myricetin significantly potentiated aerobic capacity in mice, as evidenced by their increased running time and distance. The elevated mitochondrial function was associated with induction of genes for oxidative phosphorylation and mitochondrial biogenesis in metabolically active tissues. Importantly, myricetin treatment led to decreased PGC-1α acetylation through SIRT1 activation. Furthermore, myricetin significantly improved the healthspan and lifespan of wild-type, but not Sir-2.1-deficient, C. elegans. These results demonstrate that myricetin enhances mitochondrial activity, possibly by activating PGC-1α and SIRT1, to improve physical endurance, strongly suggesting myricetin as a mitochondria-activating agent.
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355
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Estrela JM, Mena S, Obrador E, Benlloch M, Castellano G, Salvador R, Dellinger RW. Polyphenolic Phytochemicals in Cancer Prevention and Therapy: Bioavailability versus Bioefficacy. J Med Chem 2017; 60:9413-9436. [PMID: 28654265 DOI: 10.1021/acs.jmedchem.6b01026] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Natural polyphenols are organic chemicals which contain phenol units in their structures. They show antitumor properties. However, a key problem is their short half-life and low bioavailability under in vivo conditions. Still, definitively demonstrating the human benefits of isolated polyphenolic compounds (alone or in combination) using modern scientific methodology has proved challenging. The most common discrepancy between experimental and clinical observations is the use of nonphysiologically relevant concentrations of polyphenols in mechanistic studies. Thus, it remains highly controversial how applicable underlying mechanisms are with bioavailable concentrations and biological half-life. The present Perspective analyses proposed antitumor mechanisms, in vivo reported antitumor effects, and possible mechanisms that may explain discrepancies between bioavailability and bioefficacy. Polyphenol metabolism and possible toxic side effects are also considered. Our main conclusion emphasizes that these natural molecules (and their chemical derivatives) indeed can be very useful, not only as cancer chemopreventive agents but also in oncotherapy.
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Affiliation(s)
- José M Estrela
- Department of Physiology, University of Valencia , 46010 Valencia, Spain
| | - Salvador Mena
- Department of Physiology, University of Valencia , 46010 Valencia, Spain
| | - Elena Obrador
- Department of Physiology, University of Valencia , 46010 Valencia, Spain
| | - María Benlloch
- Department of Health and Functional Valorization, San Vicente Martir Catholic University , 46008 Valencia, Spain
| | - Gloria Castellano
- Department of Health and Functional Valorization, San Vicente Martir Catholic University , 46008 Valencia, Spain
| | - Rosario Salvador
- Department of Physiology, University of Valencia , 46010 Valencia, Spain
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356
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Abstract
Mitochondria play a key role in ATP generation, redox homeostasis and regulation of apoptosis. Due to the essential role of mitochondria in metabolism and cell survival, targeting mitochondria in cancer cells is considered as an attractive therapeutic strategy. However, metabolic flexibility in cancer cells may enable the upregulation of compensatory pathways, such as glycolysis to support cancer cell survival when mitochondrial metabolism is inhibited. Thus, compounds capable of both targeting mitochondria and inhibiting glycolysis may be particularly useful to overcome such drug-resistant mechanism. This review provides an update on recent development in the field of targeting mitochondria and novel compounds that impact mitochondria, glycolysis or both. Key challenges in this research area and potential solutions are also discussed.
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357
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Mármol I, Sánchez-de-Diego C, Jiménez-Moreno N, Ancín-Azpilicueta C, Rodríguez-Yoldi MJ. Therapeutic Applications of Rose Hips from Different Rosa Species. Int J Mol Sci 2017; 18:ijms18061137. [PMID: 28587101 PMCID: PMC5485961 DOI: 10.3390/ijms18061137] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 05/15/2017] [Accepted: 05/18/2017] [Indexed: 12/20/2022] Open
Abstract
Rosa species, rose hips, are widespread wild plants that have been traditionally used as medicinal compounds for the treatment of a wide variety of diseases. The therapeutic potential of these plants is based on its antioxidant effects caused by or associated with its phytochemical composition, which includes ascorbic acid, phenolic compounds and healthy fatty acids among others. Over the last few years, medicinal interest in rose hips has increased as a consequence of recent research that has studied its potential application as a treatment for several diseases including skin disorders, hepatotoxicity, renal disturbances, diarrhoea, inflammatory disorders, arthritis, diabetes, hyperlipidaemia, obesity and cancer. In this review, the role of different species of Rosa in the prevention of treatment of various disorders related to oxidative stress, is examined, focusing on new therapeutic approaches from a molecular point of view.
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Affiliation(s)
- Inés Mármol
- Department of Pharmacology and Physiology, University of Zaragoza, Zaragoza 50013, Spain.
| | | | - Nerea Jiménez-Moreno
- Department of Applied Chemistry, Public University of Navarra, Pamplona 31006, Spain.
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358
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Ajayi AM, Martins DTDO, Balogun SO, Oliveira RGD, Ascêncio SD, Soares IM, Barbosa RDS, Ademowo OG. Ocimum gratissimum L. leaf flavonoid-rich fraction suppress LPS-induced inflammatory response in RAW 264.7 macrophages and peritonitis in mice. JOURNAL OF ETHNOPHARMACOLOGY 2017; 204:169-178. [PMID: 28400288 DOI: 10.1016/j.jep.2017.04.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 04/07/2017] [Accepted: 04/07/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ocimum gratissimum L. is a herbaceous plant that has been reported in several ethnopharmacological surveys as a plant readily accessible to the communities and widely used for the treatment of inflammatory diseases. The main goal of this study was to investigate the in vitro and in vivo anti-inflammatory activity and mechanism of action of the ethylacetate fraction of O. gratissimum leaf (EAFOg) and to chemically characterize this fraction. MATERIALS AND METHODS EAFOg was obtained from a sequential methanol extract. The safety profile was evaluated on RAW 264.7 cells, using the alamarBlue® assay. Phenolic contents were determined by spectrophotometry, and metabolites quantified by high performance liquid chromatography. The anti-inflammatory activity of EAFOg and its ability to acts on leucocytes infiltration, inflammatory mediators as NO, IL-1β, TNF-α, and IL-10 in lipopolysaccharide-induced peritonitis in mice and LPS-stimulated RAW 264.7 macrophage were evaluated. In addition, the anti-inflammatory activity of EAFOg was also investigated in arachidonic acid-related enzymes. RESULTS Total phenolic and flavonoid contents of EAFOg were 139.76±1.07mg GAE/g and 109.95±0.05mg RE/g respectively. HPLC analysis revealed the presence of rutin, ellagic acid, myricetin and morin. The fraction exhibited no cytotoxic effects on the RAW 264.7 cells. The EAFOg (10, 50 and 200mg/kg) significantly reduced (p<0.05) neutrophils (38.8%, 58.9%, and 66.5%) and monocytes (38.9%, 58.0% and 72.8%) in LPS-induced peritonitis. Also, EAFOg (5, 20 and 100µg/mL) produced significant reduction in NO, IL-1β, and TNF-α in RAW 264.7 cells. However, IL-10 level was not affected by the EAFOg, and it preferentially inhibits COX-2 (IC50 =48.86±0.02µg/mL) than COX-1 and 15-LO (IC50 >100µg/mL). CONCLUSION The flavonoid-rich fraction of O. gratissimum leaves demonstrated anti-inflammatory activity via mechanisms that involves inhibition of leucocytes influx, NO, IL-1β, and TNF-α in vivo and in vitro, thus supporting its therapeutic potential in slowing down inflammatory processes in chronic diseases.
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Affiliation(s)
- Abayomi Mayowa Ajayi
- Department of Basic Health Sciences, Faculty of Medicine, Federal University of Mato Grosso (UFMT), Av. Fernando Correa da Costa, no. 2367, Coxipó, Boa Esperança, Cuiabá 78060-900, Mato Grosso, Brazil; Natural Products Research Laboratory, Faculty of Medicine, Federal University of Tocantins (UFT), Av. NS15, Palmas 77020-210, Tocantins, Brazil
| | - Domingos Tabajara de Oliveira Martins
- Department of Basic Health Sciences, Faculty of Medicine, Federal University of Mato Grosso (UFMT), Av. Fernando Correa da Costa, no. 2367, Coxipó, Boa Esperança, Cuiabá 78060-900, Mato Grosso, Brazil
| | - Sikiru Olaitan Balogun
- Department of Basic Health Sciences, Faculty of Medicine, Federal University of Mato Grosso (UFMT), Av. Fernando Correa da Costa, no. 2367, Coxipó, Boa Esperança, Cuiabá 78060-900, Mato Grosso, Brazil; Curso da Farmácia, AJES, Faculdades de Vale do Juruena. Avenida Gabriel Müller, s/n AJES - Módulo I, 78320-000, Juína Mato Grosso, Brazil
| | - Ruberlei Godinho de Oliveira
- Department of Basic Health Sciences, Faculty of Medicine, Federal University of Mato Grosso (UFMT), Av. Fernando Correa da Costa, no. 2367, Coxipó, Boa Esperança, Cuiabá 78060-900, Mato Grosso, Brazil
| | - Sérgio Donizeti Ascêncio
- Natural Products Research Laboratory, Faculty of Medicine, Federal University of Tocantins (UFT), Av. NS15, Palmas 77020-210, Tocantins, Brazil
| | - Ilsamar Mendes Soares
- Natural Products Research Laboratory, Faculty of Medicine, Federal University of Tocantins (UFT), Av. NS15, Palmas 77020-210, Tocantins, Brazil
| | - Robson Dos Santos Barbosa
- Natural Products Research Laboratory, Faculty of Medicine, Federal University of Tocantins (UFT), Av. NS15, Palmas 77020-210, Tocantins, Brazil
| | - Olusegun George Ademowo
- Department of Pharmacology & Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Oyo - State, Nigeria.
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359
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Myricetin-induced brown adipose tissue activation prevents obesity and insulin resistance in db/db mice. Eur J Nutr 2017; 57:391-403. [DOI: 10.1007/s00394-017-1433-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 03/05/2017] [Indexed: 01/20/2023]
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360
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Chen S, Fan B. Myricetin protects cardiomyocytes from LPS-induced injury. Herz 2017; 43:265-274. [PMID: 28357449 DOI: 10.1007/s00059-017-4556-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 01/24/2017] [Accepted: 02/22/2017] [Indexed: 01/09/2023]
Abstract
BACKGROUND Sepsis-induced cardiomyopathy is a well-known cause of mortality. Recent evidence has highlighted the important role of myricetin in anti-inflammation and anti-oxidative stress. However, little is known about its effect on endotoxin-induced cardiomyopathy. We examined the effect of myricetin on lipopolysaccharide (LPS)-induced cardiomyocyte injury and the underlying mechanisms in vitro. METHODS mRNA expression of interleukin (IL)-1beta, IL-6, and tumor necrosis factor (TNF)-alpha was examined via reverse transcription-quantitative polymerase chain reaction (RT-qPCR). Protein expression levels of NF-κB/p65, IκB, IL-1beta, IL-6, and TNF-alpha were assesses via Western blotting. Immunofluorescence (IF) was used to determine the nuclear translocation of p65. Commercial kits were employed to detect the level of oxidative markers and to quantify NF-κB/p65 both in the cytoplasm and the nucleus. Finally, terminal deoxy-nucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) was performed to evaluate the apoptosis of H9c2 cardiomyocytes. RESULTS The results showed that myricetin blunted the overexpression of IL-1beta, IL-6, and TNF-alpha markedly by inhibiting the NF-κB/P65 signaling pathway. Furthermore, myricetin treatment led to the downregulation of reactive oxygen species (ROS) accompanied by increased expression of superoxide dismutase and glutathione peroxidase. TUNEL-positive nuclei were rarely detected following myricetin treatment. CONCLUSION Our findings suggest that myricetin is a valuable protective agent against endotoxin-induced early inflammatory responses in H9c2 cardiomyocytes, which involves regulation of ROS and the IκB/NF-κb signaling pathway.
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Affiliation(s)
- S Chen
- School of Pharmacy, Hubei University of Science and Technology, 437100, Hubei Xianning, China
| | - B Fan
- School of Pharmacy, Hubei University of Science and Technology, 437100, Hubei Xianning, China.
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361
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Li Y, Zheng X, Yi X, Liu C, Kong D, Zhang J, Gong M. Myricetin: a potent approach for the treatment of type 2 diabetes as a natural class B GPCR agonist. FASEB J 2017; 31:2603-2611. [PMID: 28270518 PMCID: PMC5434659 DOI: 10.1096/fj.201601339r] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 02/13/2017] [Indexed: 01/08/2023]
Abstract
The physiologic properties of glucagon-like peptide 1 (GLP-1) make it a potent candidate drug target in the treatment of type 2 diabetes mellitus (T2DM). GLP-1 is capable of regulating the blood glucose level by insulin secretion after administration of oral glucose. The advantages of GLP-1 for the avoidance of hypoglycemia and the control of body weight are attractive despite its poor stability. The clinical efficacies of long-acting GLP-1 derivatives strongly support discovery pursuits aimed at identifying and developing orally active, small-molecule GLP-1 receptor (GLP-1R) agonists. The purpose of this study was to identify and characterize a novel oral agonist of GLP-1R (i.e., myricetin). The insulinotropic characterization of myricetin was performed in isolated islets and in Wistar rats. Long-term oral administration of myricetin demonstrated glucoregulatory activity. The data in this study suggest that myricetin might be a potential drug candidate for the treatment of T2DM as a GLP-1R agonist. Further structural modifications on myricetin might improve its pharmacology and pharmacokinetics.-Li, Y., Zheng, X., Yi, X., Liu, C., Kong, D., Zhang, J., Gong, M. Myricetin: a potent approach for the treatment of type 2 diabetes as a natural class B GPCR agonist.
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Affiliation(s)
- Ying Li
- Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin Medical University, Tianjin, China
| | - Xuemin Zheng
- State Key Laboratory of Drug Delivery Technology and Pharmacokinetics, Tianjin Institute of Pharmaceutical Research, Tianjin, China
| | - Xiulin Yi
- State Key Laboratory of Drug Delivery Technology and Pharmacokinetics, Tianjin Institute of Pharmaceutical Research, Tianjin, China
| | - Changxiao Liu
- State Key Laboratory of Drug Delivery Technology and Pharmacokinetics, Tianjin Institute of Pharmaceutical Research, Tianjin, China
| | - Dexin Kong
- Department of Pharmacy, Tianjin Medical University, Tianjin, China
| | - Jianning Zhang
- Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin Medical University, Tianjin, China;
| | - Min Gong
- Department of Pharmacy, Tianjin Medical University, Tianjin, China; .,Department of Oncology, University of Oxford, Oxford, United Kingdom
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362
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Siddique Y, Ara G, Afzal M, Jyoti S. Effect of Myricetin on the Oxidative Stress Markers in the Brain of Transgenic Flies Expressing Human Alpha-Synuclein. ACTA ACUST UNITED AC 2017. [DOI: 10.4103/ijnpnd.ijnpnd_41_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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363
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Basu Mallik S, Pai A, Shenoy RR, Jayashree BS. Novel flavonol analogues as potential inhibitors of JMJD3 histone demethylase-A study based on molecular modelling. J Mol Graph Model 2016; 72:81-87. [PMID: 28064082 DOI: 10.1016/j.jmgm.2016.12.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 10/21/2016] [Accepted: 12/01/2016] [Indexed: 12/12/2022]
Abstract
Epigenetic modulation of gene expression has drawn enormous attention among researchers globally in the present scenario. Since their discovery, Jmj-C histone demethylases were identified as useful markers in understanding the role of epigenetics in inflammatory conditions and in cancer as well. This has created arousal of interest in search of suitable candidates. Potential inhibitors from various other scaffolds such as hydroxyquinolines, hydroxamic acids and triazolopyridines have already been identified and reported. In this direction, our present study attempts to target one of the important members of the family- namely JMJD3 (also known as KDM6B), that plays a pivotal role in inflammatory and immune reactions. Using molecular modeling approaches, myricetin analogues were identified as promising inhibitors of JMJD3. Extensive literature review showed myricetin as the most promising flavonol inhibitor for this enzyme. It served as a prototype for our study and modification of it's scaffold led to generation of analogues. The ZINC database was used as a repository for natural compounds and their analogues. Using similarity search options, 65 analogues of myricetin were identified and screened against JMJD3 (PDB ID: 4ASK), using the high throughput virtual screening and ligand docking tools in Maestro Molecular Modeling platform (version 10.5) from Schrödinger, LLC. 8 analogues out of 65 were identified as the most appropriate candidates which gave the best pose in ligand docking. Their binding mode and energy calculations were analysed using induced fit docking (IFD) and prime-MMGBSA tool, respectively. Thus, our findings highlight the most promising analogues of myricetin with comparable binding affinity as well as binding energy than their counterparts that could be taken for further optimisation as inhibitors of JMJD3 in both in vitro and in vivo screening studies.
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Affiliation(s)
- Sanchari Basu Mallik
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, 576104, India
| | - Aravinda Pai
- Department of Pharmaceutical Chemistry, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, 576104, India
| | - Rekha R Shenoy
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, 576104, India
| | - B S Jayashree
- Department of Pharmaceutical Chemistry, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal, 576104, India.
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364
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Xia SF, Le GW, Wang P, Qiu YY, Jiang YY, Tang X. Regressive Effect of Myricetin on Hepatic Steatosis in Mice Fed a High-Fat Diet. Nutrients 2016; 8:nu8120799. [PMID: 27973423 PMCID: PMC5188454 DOI: 10.3390/nu8120799] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 12/04/2016] [Accepted: 12/05/2016] [Indexed: 12/16/2022] Open
Abstract
Myricetin is an effective antioxidant in the treatment of obesity and obesity-related metabolic disorders. The objective of this study was to explore the regressive effect of myricetin on pre-existing hepatic steatosis induced by high-fat diet (HFD). C57BL/6 mice were fed either a standard diet or a HFD for 12 weeks and then half of the mice were treated with myricetin (0.12% in the diet, w/w) while on their respective diets for further 12 weeks. Myricetin treatment significantly alleviated HFD-induced steatosis, decreased hepatic lipid accumulation and thiobarbituric acid reactive substance (TBARS) levels, and increased antioxidative enzyme activities, including catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx) activities. Microarray analysis of hepatic gene expression profiles showed that myricetin significantly altered the expression profiles of 177 genes which were involved in 12 biological pathways, including the peroxisome proliferator activated receptor (PPAR) signaling pathway and peroxisome. Further research indicated that myricetin elevated hepatic nuclear Nrf2 translocation, increased the protein expression of heme oxygenase-1 (HO-1) and NAD(P)H quinone dehydrogenase 1 (NQO1), reduced the protein expression of PPARγ, and normalized the expressions of genes that were involved in peroxisome and the PPAR signaling pathway. Our data indicated that myricetin might represent an effective therapeutic agent to treat HFD-induced hepatic steatosis via activating the Nrf2 pathway and the PPAR signaling pathway.
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Affiliation(s)
- Shu-Fang Xia
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China.
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Guo-Wei Le
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Peng Wang
- COFCO Corporation Oilseeds Processing Division, Beijing 100020, China.
| | - Yu-Yu Qiu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China.
| | - Yu-Yu Jiang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China.
| | - Xue Tang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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365
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Pérez-Cano FJ, Castell M. Flavonoids, Inflammation and Immune System. Nutrients 2016; 8:nu8100659. [PMID: 27775647 PMCID: PMC5084045 DOI: 10.3390/nu8100659] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 10/19/2016] [Indexed: 01/21/2023] Open
Affiliation(s)
- Francisco J Pérez-Cano
- Departament de Bioquímica i Fisiologia, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona (UB), Av. Joan XXIII 27-31, 08028 Barcelona, Spain.
- Institut de Recerca en Nutrició i Seguretat Alimentària (INSA), C/Prat de la Riba 171, Santa Coloma de Gramenet, 08921 Barcelona, Spain.
| | - Margarida Castell
- Departament de Bioquímica i Fisiologia, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona (UB), Av. Joan XXIII 27-31, 08028 Barcelona, Spain.
- Institut de Recerca en Nutrició i Seguretat Alimentària (INSA), C/Prat de la Riba 171, Santa Coloma de Gramenet, 08921 Barcelona, Spain.
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366
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The Effect of Myricetin on Pharmacokinetics of Atomoxetine and its Metabolite 4-Hydroxyatomoxetine In Vivo and In Vitro. Eur J Drug Metab Pharmacokinet 2016; 42:261-268. [DOI: 10.1007/s13318-016-0347-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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367
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Kumar P, Chaudhary N, Sharma NK, Maurya PK. Detection of oxidative stress biomarkers in myricetin treated red blood cells. RSC Adv 2016. [DOI: 10.1039/c6ra15213a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Effect of myricetin on RBC membrane enzymes (Na+, K+-ATPase and Ca2+-ATPase) and Na+, H+exchanger.
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Affiliation(s)
- Prabhanshu Kumar
- Amity Institute of Biotechnology
- Amity University Uttar Pradesh
- Noida
- India
| | - Nidhee Chaudhary
- Amity Institute of Biotechnology
- Amity University Uttar Pradesh
- Noida
- India
| | - Narendra Kumar Sharma
- Division of Infectious Disease
- Department of Medicine
- Universidade Federal de Sao Paulo – UNIFESP
- Brazil
| | - Pawan Kumar Maurya
- Amity Institute of Biotechnology
- Amity University Uttar Pradesh
- Noida
- India
- Interdisciplinary Laboratory for Clinical Neuroscience (LiNC)
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