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Yang Q, Zou Y, Wei X, Ye P, Wu Y, Ai H, Zhang Z, Tan J, Zhou J, Yang Y, Dai Q, Dou C, Luo F. PTP1B knockdown alleviates BMSCs senescence via activating AMPK-mediated mitophagy and promotes osteogenesis in senile osteoporosis. Biochim Biophys Acta Mol Basis Dis 2023:166795. [PMID: 37385514 DOI: 10.1016/j.bbadis.2023.166795] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 06/09/2023] [Accepted: 06/21/2023] [Indexed: 07/01/2023]
Abstract
The senescence of bone marrow mesenchymal stem cells (BMSCs) is the basis of senile osteoporosis (SOP). Targeting BMSCs senescence is of paramount importance for developing anti-osteoporotic strategy. In this study, we found that protein tyrosine phosphatase 1B (PTP1B), an enzyme responsible for tyrosine dephosphorylation, was significantly upregulated in BMSCs and femurs with advancing chronological age. Therefore, the potential role of PTP1B in BMSCs senescence and senile osteoporosis was studied. Firstly, significantly upregulated PTP1B expression along with impaired osteogenic differentiation capacity was observed in D-galactose (D-gal)-induced BMSCs and naturally-aged BMSCs. Furthermore, PTP1B silencing could effectively alleviate senescence, improve mitochondrial dysfunction, and restore osteogenic differentiation in aged BMSCs, which was attributable to enhanced mitophagy mediated by PKM2/AMPK pathway. In addition, hydroxychloroquine (HCQ), an autophagy inhibitor, significantly reversed the protective effects from PTP1B knockdown. In SOP animal model, transplantation of LVsh-PTP1B-transfected D-gal-induced BMSCs harvested double protective effects, including increased bone formation and reduced osteoclastogenesis. Similarly, HCQ treatment remarkably suppressed osteogenesis of LVsh-PTP1B-transfected D-gal-induced BMSCs in vivo. Taken together, our data demonstrated that PTP1B silencing protects against BMSCs senescence and mitigates SOP via activating AMPK-mediated mitophagy. Targeting PTP1B may represent a promising interventional strategy to attenuate SOP.
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Affiliation(s)
- QianKun Yang
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - YuChi Zou
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - XiaoYu Wei
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Peng Ye
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - YuTong Wu
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - HongBo Ai
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Zhao Zhang
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China; Orthopedics Department, The General Hospital of Western Theater Command PLA, Chengdu 610083, Sichuan Province, China
| | - JiuLin Tan
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Jiangling Zhou
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - YuSheng Yang
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - QiJie Dai
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Ce Dou
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Fei Luo
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China.
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Maccari R, Ottanà R. Can Allostery Be a Key Strategy for Targeting PTP1B in Drug Discovery? A Lesson from Trodusquemine. Int J Mol Sci 2023; 24:ijms24119621. [PMID: 37298571 DOI: 10.3390/ijms24119621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
Protein tyrosine phosphatase 1B (PTP1B) is an enzyme crucially implicated in aberrations of various signaling pathways that underlie the development of different human pathologies, such as obesity, diabetes, cancer, and neurodegenerative disorders. Its inhibition can prevent these pathogenetic events, thus providing a useful tool for the discovery of novel therapeutic agents. The search for allosteric PTP1B inhibitors can represent a successful strategy to identify drug-like candidates by offering the opportunity to overcome some issues related to catalytic site-directed inhibitors, which have so far hampered the development of drugs targeting this enzyme. In this context, trodusquemine (MSI-1436), a natural aminosterol that acts as a non-competitive PTP1B inhibitor, appears to be a milestone. Initially discovered as a broad-spectrum antimicrobial agent, trodusquemine exhibited a variety of unexpected properties, ranging from antidiabetic and anti-obesity activities to effects useful to counteract cancer and neurodegeneration, which prompted its evaluation in several preclinical and clinical studies. In this review article, we provide an overview of the main findings regarding the activities and therapeutic potential of trodusquemine and their correlation with PTP1B inhibition. We also included some aminosterol analogues and related structure-activity relationships that could be useful for further studies aimed at the discovery of new allosteric PTP1B inhibitors.
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Affiliation(s)
- Rosanna Maccari
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Rosaria Ottanà
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
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Zehra SA, Bhattarai P, Zhang J, Liu Y, Parveen Z, Sajid M, Zhu L. In Vitro and In Vivo Evaluation of the Antidiabetic Activity of Solidago virgaurea Extracts. CURRENT BIOACTIVE COMPOUNDS 2022; 19:e150622206034. [PMID: 37900701 PMCID: PMC10601339 DOI: 10.2174/1573407218666220615143502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/12/2022] [Accepted: 05/09/2022] [Indexed: 10/31/2023]
Abstract
Background Solidago virgaurea (Asteraceae) has been used for more than 700 years for treating cystitis, chronic nephritis, urolithiasis, rheumatism, and inflammatory diseases. However, the antidiabetic activity of Solidago virgaurea has been rarely studied. Methods Three extracts of Solidago virgaurea were prepared, and their antidiabetic potentials were evaluated by various cell-free, cell-based, and in vivo studies. Results We found that the Solidago virgaurea contained multiple bioactive phytochemicals based on the GC-MS analysis. The Solidago virgaurea extracts effectively inhibited the functions of the carbohydrate digestive enzyme (α-glucosidase) and protein tyrosine phosphatase 1B (PTP1B), as well as decreased the amount of advanced glycation end products (AGEs). In the L6 myotubes, the Solidago virgaurea methanolic extract remarkably enhanced the glucose uptake via the upregulation of glucose transporter type 4 (GLUT4). The extract also significantly downregulated the expression of PTP1B. In the streptozotocin-nicotinamide induced diabetic mice, the daily intraperitoneal injection of 100 mg/kg Solidago virgaurea methanolic extract for 24 days, substantially lowered the postprandial blood glucose level with no obvious toxicity. The extract's anti-hyperglycemic effect was comparable to that of the glibenclamide treatment. Conclusion Our findings suggested that the Solidago virgaurea extract might have great potential in the prevention and treatment of diabetes.
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Affiliation(s)
- Syeda Andleeb Zehra
- Department of Pharmaceutical Sciences, Irma Lerma Rangel School of Pharmacy, Texas A&M University, College Station, 78363, USA
- Department of Biochemistry, Faculty of Health Sciences, Hazara University, Mansehra, 21300, Pakistan
| | - Prapanna Bhattarai
- Department of Pharmaceutical Sciences, Irma Lerma Rangel School of Pharmacy, Texas A&M University, College Station, 78363, USA
| | - Jian Zhang
- Department of Pharmaceutical Sciences, Irma Lerma Rangel School of Pharmacy, Texas A&M University, College Station, 78363, USA
| | - Yin Liu
- Department of Pharmaceutical Sciences, Irma Lerma Rangel School of Pharmacy, Texas A&M University, College Station, 78363, USA
| | - Zahida Parveen
- Department of Biochemistry, Abdul Wali Khan University, Mardan, 23200, Pakistan
| | - Muhammad Sajid
- Department of Biochemistry, Faculty of Health Sciences, Hazara University, Mansehra, 21300, Pakistan
| | - Lin Zhu
- Department of Pharmaceutical Sciences, Irma Lerma Rangel School of Pharmacy, Texas A&M University, College Station, 78363, USA
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Behl T, Gupta A, Sehgal A, Albarrati A, Albratty M, Meraya AM, Najmi A, Bhatia S, Bungau S. Exploring protein tyrosine phosphatases (PTP) and PTP-1B inhibitors in management of diabetes mellitus. Biomed Pharmacother 2022; 153:113405. [DOI: 10.1016/j.biopha.2022.113405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 07/07/2022] [Accepted: 07/08/2022] [Indexed: 11/02/2022] Open
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Sukanya S, Choudhary BS, Mehta P, Filipek S, Malik R. Identification of CNS compatible small molecules as glycogen synthase kinase-3β (GSK-3β) inhibitors through structure-based virtual screening. Med Chem Res 2022. [DOI: 10.1007/s00044-022-02912-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Mannino GC, Averta C, Fiorentino TV, Succurro E, Spiga R, Mancuso E, Miceli S, Perticone M, Sciacqua A, Andreozzi F, Sesti G. The TRIB3 R84 variant is associated with increased left ventricular mass in a sample of 2426 White individuals. Cardiovasc Diabetol 2021; 20:115. [PMID: 34051802 PMCID: PMC8164223 DOI: 10.1186/s12933-021-01308-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 05/24/2021] [Indexed: 11/15/2022] Open
Abstract
Background Prior studies in animal models showed that increased cardiac expression of TRIB3 has a pathogenic role in inducing left ventricular mass (LVM). Whether alterations in TRIB3 expression or function have a pathogenic role in inducing LVM increase also in humans is still unsettled. In order to address this issue, we took advantage of a nonsynonymous TRIB3 Q84R polymorphism (rs2295490), a gain-of-function amino acid substitution impairing insulin signalling, and action in primary human endothelial cells which has been associated with insulin resistance, and early vascular atherosclerosis. Methods SNP rs2295490 was genotyped in 2426 White adults in whom LVM index (LVMI) was assessed by validated echocardiography-derived measures. Results After adjusting for age and sex, LVMI progressively and significantly increased from 108 to 113, to 125 g/m2 in Q84Q, Q84R, and R84R individuals, respectively (Q84R vs. Q84Q, P = 0.03; R84R vs. Q84Q, P < 0.0001). The association between LVMI and the Q84R and R84R genotype remained significant after adjusting for blood pressure, smoking habit, fasting glucose levels, glucose tolerance status, anti-hypertensive treatments, and lipid-lowering therapy (Q84R vs. Q84Q, P = 0.01; R84R vs. Q84Q, P < 0.0001). Conclusions We found that the gain-of-function TRIB3 Q84R variant is significantly associated with left ventricular mass in a large sample of White nondiabetic individual of European ancestry.
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Affiliation(s)
- Gaia Chiara Mannino
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Carolina Averta
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Teresa Vanessa Fiorentino
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Elena Succurro
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Rosangela Spiga
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Elettra Mancuso
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Sofia Miceli
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Maria Perticone
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Angela Sciacqua
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Francesco Andreozzi
- Department of Medical and Surgical Sciences, University "Magna Graecia" of Catanzaro, Viale Europa, 88100, Catanzaro, Italy.
| | - Giorgio Sesti
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Viale Regina Elena, 324, 00161, Rome, Italy.
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Wang L, Umezawa K. Cellular Signal Transductions and Their Inhibitors Derived from Deep-Sea Organisms. Mar Drugs 2021; 19:md19040205. [PMID: 33916424 PMCID: PMC8065634 DOI: 10.3390/md19040205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 03/30/2021] [Accepted: 04/02/2021] [Indexed: 12/11/2022] Open
Abstract
Not only physiological phenomena but also pathological phenomena can now be explained by the change of signal transduction in the cells of specific tissues. Commonly used cellular signal transductions are limited. They consist of the protein-tyrosine kinase dependent or independent Ras-ERK pathway, and the PI3K-Akt, JAK-STAT, SMAD, and NF-κB-activation pathways. In addition, biodegradation systems, such as the ubiquitin-proteasome pathway and autophagy, are also important for physiological and pathological conditions. If we can control signaling for each by a low-molecular-weight agent, it would be possible to treat diseases in new ways. At present, such cell signaling inhibitors are mainly looked for in plants, soil microorganisms, and the chemical library. The screening of bioactive metabolites from deep-sea organisms should be valuable because of the high incidence of finding novel compounds. Although it is still an emerging field, there are many successful examples, with new cell signaling inhibitors. In this review, we would like to explain the current view of the cell signaling systems important in diseases, and show the inhibitors found from deep-sea organisms, with their structures and biological activities. These inhibitors are possible candidates for anti-inflammatory agents, modulators of metabolic syndromes, antimicrobial agents, and anticancer agents.
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Affiliation(s)
- Liyan Wang
- Shenzhen Key Laboratory of Marine Bioresource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China;
| | - Kazuo Umezawa
- Molecular Target Medicine, School of Medicine, Aichi Medical University, Nagakute 480-1195, Japan
- Correspondence: ; Tel.: +81-561-611-959
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Saeting O, Chandarajoti K, Phongphisutthinan A, Hongsprabhas P, Sae-tan S. Water Extract of Mungbean ( Vigna radiata L.) Inhibits Protein Tyrosine Phosphatase-1B in Insulin-Resistant HepG2 Cells. Molecules 2021; 26:molecules26051452. [PMID: 33800074 PMCID: PMC7962124 DOI: 10.3390/molecules26051452] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/26/2021] [Accepted: 03/03/2021] [Indexed: 12/27/2022] Open
Abstract
The present study aimed to investigate the effects of mungbean water extract (MWE) on insulin downstream signaling in insulin-resistant HepG2 cells. Whole seed mungbean was extracted using boiling water, mimicking a traditional cooking method. Vitexin and isovitexin were identified in MWE. The results showed that MWE inhibited protein tyrosine phosphatase (PTP)-1B (IC50 = 10 μg/mL), a negative regulator of insulin signaling. MWE enhanced cellular glucose uptake and altered expression of genes involved in glucose metabolism, including forkhead box O1 (FOXO1), phosphoenolpyruvate carboxykinase (PEPCK), and glycogen synthase kinase (GSK)-3β in the insulin-resistant HepG2 cells. In addition, MWE inhibited both α-amylase (IC50 = 36.65 mg/mL) and α-glucosidase (IC50 = 3.07 mg/mL). MWE also inhibited the formation of advanced glycation end products (AGEs) (IC50 = 2.28 mg/mL). This is the first study to show that mungbean water extract increased cellular glucose uptake and improved insulin sensitivity of insulin-resistant HepG2 cells through PTP-1B inhibition and modulating the expression of genes related to glucose metabolism. This suggests that mungbean water extract has the potential to be a functional ingredient for diabetes.
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Affiliation(s)
- Orathai Saeting
- Department of Food Science and Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand; (O.S.); (P.H.)
| | - Kasemsiri Chandarajoti
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand;
- Drug Delivery System Excellence Center, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Angsuma Phongphisutthinan
- Division of Pharmaceutical Sciences, Faculty of Pharmacy, Thammasat University, Rangsit Center, Pathumthani 12121, Thailand;
| | - Parichat Hongsprabhas
- Department of Food Science and Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand; (O.S.); (P.H.)
| | - Sudathip Sae-tan
- Department of Food Science and Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand; (O.S.); (P.H.)
- Correspondence: ; Tel.: +66-2562-5037
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Chen S, Sbuh N, Veedu RN. Antisense Oligonucleotides as Potential Therapeutics for Type 2 Diabetes. Nucleic Acid Ther 2020; 31:39-57. [PMID: 33026966 DOI: 10.1089/nat.2020.0891] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Type 2 diabetes (T2D) is a chronic metabolic disorder characterized by persistent hyperglycemia resulting from inefficient signaling and insufficient production of insulin. Conventional management of T2D has largely relied on small molecule-based oral hypoglycemic medicines, which do not halt the progression of the disease due to limited efficacy and induce adverse effects as well. To this end, antisense oligonucleotide has attracted immense attention in developing antidiabetic agents because of their ability to downregulate the expression of disease-causing genes at the RNA and protein level. To date, seven antisense agents have been approved by the United States Food and Drug Administration for therapies of a variety of human maladies, including genetic disorders. Herein, we provide a comprehensive review of antisense molecules developed for suppressing the causative genes believed to be responsible for insulin resistance and hyperglycemia toward preventing and treating T2D.
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Affiliation(s)
- Suxiang Chen
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, Australia.,Perron Institute for Neurological and Translational Science, Perth, Australia
| | - Nabayet Sbuh
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, Australia.,Perron Institute for Neurological and Translational Science, Perth, Australia
| | - Rakesh N Veedu
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, Australia.,Perron Institute for Neurological and Translational Science, Perth, Australia
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Iwaloye O, Elekofehinti OO, Oluwarotimi EA, Kikiowo BI, Fadipe TM. Insight into glycogen synthase kinase-3β inhibitory activity of phyto-constituents from Melissa officinalis: in silico studies. In Silico Pharmacol 2020; 8:2. [PMID: 32968615 PMCID: PMC7487069 DOI: 10.1007/s40203-020-00054-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 09/02/2020] [Indexed: 02/07/2023] Open
Abstract
Over activity of Glycogen synthase kinase-3β (GSK-3β), a serine/threonine-protein kinase has been implicated in a number of diseases including stroke, type II diabetes and Alzheimer disease (AD). This study aimed to find novel inhibitors of GSK-3β from phyto-constituents of Melissa officinalis with the aid of computational analysis. Molecular docking, induced-fit docking (IFD), calculation of binding free energy via the MM-GBSA approach and Lipinski's rule of five (RO5) were employed to filter the compounds and determine their druggability. Most importantly, the compounds pIC50 were predicted by machine learning-based model generated by AutoQSAR algorithm. The generated model was validated to affirm its predictive model. The best model obtained was Model kpls_desc_38 (R2 = 0.8467 and Q2 = 0.8069), and this external validated model was utilized to predict the bioactivities of the lead compounds. While a number of characterized compounds from Melissa officinalis showed better docking score, binding free energy alongside adherence to RO5 than co-cystallized ligand, only three compounds (salvianolic acid C, ellagic acid and naringenin) showed more satisfactory pIC50. The results obtained in this study can be useful to design potent inhibitors of GSK-3β.
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Affiliation(s)
- Opeyemi Iwaloye
- Bioinformatics and Molecular Biology Unit, Department of Biochemistry, Federal University of Technology, Akure, Ondo State Nigeria
| | - Olusola Olalekan Elekofehinti
- Bioinformatics and Molecular Biology Unit, Department of Biochemistry, Federal University of Technology, Akure, Ondo State Nigeria
| | - Emmanuel Ayo Oluwarotimi
- Bioinformatics and Molecular Biology Unit, Department of Biochemistry, Federal University of Technology, Akure, Ondo State Nigeria
| | - Babatom iwa Kikiowo
- Bioinformatics and Molecular Biology Unit, Department of Biochemistry, Federal University of Technology, Akure, Ondo State Nigeria
| | - Toyin Mary Fadipe
- Bioinformatics and Molecular Biology Unit, Department of Biochemistry, Federal University of Technology, Akure, Ondo State Nigeria
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Tan Y, Zhang Z, Zheng C, Wintergerst KA, Keller BB, Cai L. Mechanisms of diabetic cardiomyopathy and potential therapeutic strategies: preclinical and clinical evidence. Nat Rev Cardiol 2020; 17:585-607. [PMID: 32080423 PMCID: PMC7849055 DOI: 10.1038/s41569-020-0339-2] [Citation(s) in RCA: 354] [Impact Index Per Article: 88.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/16/2020] [Indexed: 02/07/2023]
Abstract
The pathogenesis and clinical features of diabetic cardiomyopathy have been well-studied in the past decade, but effective approaches to prevent and treat this disease are limited. Diabetic cardiomyopathy occurs as a result of the dysregulated glucose and lipid metabolism associated with diabetes mellitus, which leads to increased oxidative stress and the activation of multiple inflammatory pathways that mediate cellular and extracellular injury, pathological cardiac remodelling, and diastolic and systolic dysfunction. Preclinical studies in animal models of diabetes have identified multiple intracellular pathways involved in the pathogenesis of diabetic cardiomyopathy and potential cardioprotective strategies to prevent and treat the disease, including antifibrotic agents, anti-inflammatory agents and antioxidants. Some of these interventions have been tested in clinical trials and have shown favourable initial results. In this Review, we discuss the mechanisms underlying the development of diabetic cardiomyopathy and heart failure in type 1 and type 2 diabetes mellitus, and we summarize the evidence from preclinical and clinical studies that might provide guidance for the development of targeted strategies. We also highlight some of the novel pharmacological therapeutic strategies for the treatment and prevention of diabetic cardiomyopathy.
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Affiliation(s)
- Yi Tan
- Pediatric Research Institute, Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY, USA.
- Wendy Novak Diabetes Center, University of Louisville, Norton Children's Hospital, Louisville, KY, USA.
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA.
| | - Zhiguo Zhang
- Department of Cardiology, The First Hospital of Jilin University, Changchun, China
| | - Chao Zheng
- The Second Affiliated Hospital Center of Chinese-American Research Institute for Diabetic Complications, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Kupper A Wintergerst
- Pediatric Research Institute, Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY, USA
- Wendy Novak Diabetes Center, University of Louisville, Norton Children's Hospital, Louisville, KY, USA
- Division of Endocrinology, Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY, USA
| | - Bradley B Keller
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA
- Kosair Charities Pediatric Heart Research Program, Cardiovascular Innovation Institute, University of Louisville, Louisville, KY, USA
| | - Lu Cai
- Pediatric Research Institute, Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY, USA.
- Wendy Novak Diabetes Center, University of Louisville, Norton Children's Hospital, Louisville, KY, USA.
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, USA.
- Department of Radiation Oncology, University of Louisville School of Medicine, Louisville, KY, USA.
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Govindaraju K, Suganya KSU. In vitro anti-diabetic assessment of guavanoic acid functionalized gold nanoparticles in regulating glucose transport using L6 rat skeletal muscle cells. RSC Med Chem 2020; 11:814-822. [PMID: 33479677 DOI: 10.1039/d0md00125b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 04/27/2020] [Indexed: 12/22/2022] Open
Abstract
Guavanoic acid functionalized gold nanoparticles exhibit anti-diabetic potential by improving insulin dependent glucose uptake in L6 rat skeletal muscle cells. The mode of action of the gold nanoparticles was established from the glucose uptake assay in the presence and absence of genistein and wortmannin. The anti-diabetic efficacy of guavanoic acid functionalized gold nanoparticles was put forth by in vitro assays like for PTP 1B, α-amylase and α-glucosidase enzyme activities. Studies on cytotoxicity revealed 50% inhibition of cells at 265 ± 0.01 μg mL-1. In the LDH enzyme release assay on differentiated L6 myoblasts treated with different concentrations (1-100 μg mL-1) of guavanoic acid functionalized gold nanoparticles, a viability of 75% at 100 μg mL-1 was observed.
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Affiliation(s)
- K Govindaraju
- Centre for Ocean Research (DST-FIST Sponsored Centre) , Sathyabama Institute of Science and Technology , Chennai-600 119 , India . ;
| | - K S Uma Suganya
- Centre for Ocean Research (DST-FIST Sponsored Centre) , Sathyabama Institute of Science and Technology , Chennai-600 119 , India . ; .,Department of Biotechnology and Biochemical Engineering , Sree Chitra Thirunal College of Engineering , Pappanamcode , Thiruvananthapuram , Kerala-695018 , India
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13
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He Z, Han S, Wu C, Liu L, Zhu H, Liu A, Lu Q, Huang J, Du X, Li N, Xie Q, Wan L, Ni J, Chen L, Yang X, Liu Q. Bis(ethylmaltolato)oxidovanadium(iv) inhibited the pathogenesis of Alzheimer's disease in triple transgenic model mice. Metallomics 2020; 12:474-490. [PMID: 31970356 DOI: 10.1039/c9mt00271e] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Vanadium compounds have been reported to mimic the anti-diabetes effects of insulin on rodent models, but their effects on Alzheimer's disease (AD) have rarely been explored. In this paper, 9-month-old triple transgenic AD model mice (3×Tg-AD) received bis(ethylmaltolato)oxidovanadium(iv) (BEOV) at doses of 0.2 mmol L-1 (68.4 μg mL-1) and 1.0 mmol L-1 (342 μg mL-1) for 3 months. BEOV at both doses was found to improve contextual memory and spatial learning in AD mice. It also improved glucose metabolism and protected neuronal synapses in the AD brain, as evidenced respectively by 18F-labeled fluoro-deoxyglucose positron emission tomography (18F-FDG-PET) scanning and by transmission electron microscopy. Inhibitory effects of BEOV on β-amyloid (Aβ) plaques and neuronal impairment in the cortex and hippocampus of fluorescent AD mice were visualized three-dimensionally by applying optical clearing technology to brain slices before confocal laser scanning microscopy. Western blot analysis semi-quantitatively revealed the altered levels of Aβ42 in the brains of wildtype, AD, and AD treated with 0.2 and 1.0 mmol L-1 BEOV mice (70.3%, 100%, 83.2% and 56.8% in the hippocampus; 82.4%, 100%, 66.9% and 42% in the cortex, respectively). The mechanism study showed that BEOV increased the expression of peroxisome proliferator-activated receptor γ (PPARγ) (140%, 100%, 142% and 160% in the hippocampus; 167%, 100%, 124% and 133% in the cortex) to inactivate the JAK2/STAT3/SOCS-1 pathway and to block the amyloidogenesis cascade, thus attenuating Aβ-induced insulin resistance in AD models. BEOV also reduced protein tyrosine phosphatase 1B (PTP1B) expression (74.8%, 100%, 76.5% and 53.8% in the hippocampus; 71.8%, 100%, 94.2% and 81.8% in cortex) to promote insulin sensitivity and to stimulate the PI3K/Akt/GSK3β pathway, subsequently reducing tau hyperphosphorylation (phosphorylated tau396 levels were 51.1%, 100%, 56.1% and 50.2% in the hippocampus; 22.2%, 100%, 36.1%, and 24% in the cortex). Our results suggested that BEOV reduced the pathological hallmarks of AD by targeting the pathways of PPARγ and PTP1B in 3×Tg AD mice.
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Affiliation(s)
- Zhijun He
- Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China.
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14
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Softic S, Stanhope KL, Boucher J, Divanovic S, Lanaspa MA, Johnson RJ, Kahn CR. Fructose and hepatic insulin resistance. Crit Rev Clin Lab Sci 2020; 57:308-322. [PMID: 31935149 DOI: 10.1080/10408363.2019.1711360] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Excessive caloric intake in a form of high-fat diet (HFD) was long thought to be the major risk factor for development of obesity and its complications, such as fatty liver disease and insulin resistance. Recently, there has been a paradigm shift and more attention is attributed to the effects of sugar-sweetened beverages (SSBs) as one of the culprits of the obesity epidemic. In this review, we present the data invoking fructose intake with development of hepatic insulin resistance in human studies and discuss the pathways by which fructose impairs hepatic insulin action in experimental animal models. First, we described well-characterized pathways by which fructose metabolism indirectly leads to hepatic insulin resistance. These include unequivocal effects of fructose to promote de novo lipogenesis (DNL), impair fatty acid oxidation (FAO), induce endoplasmic reticulum (ER) stress and trigger hepatic inflammation. Additionally, we entertained the hypothesis that fructose can directly impede insulin signaling in the liver. This appears to be mediated by reduced insulin receptor and insulin receptor substrate 2 (IRS2) expression, increased protein-tyrosine phosphatase 1B (PTP1b) activity, whereas knockdown of ketohexokinase (KHK), the rate-limiting enzyme of fructose metabolism, increased insulin sensitivity. In summary, dietary fructose intake strongly promotes hepatic insulin resistance via complex interplay of several metabolic pathways, at least some of which are independent of increased weight gain and caloric intake. The current evidence shows that the fructose, but not glucose, component of dietary sugar drives metabolic complications and contradicts the notion that fructose is merely a source of palatable calories that leads to increased weight gain and insulin resistance.
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Affiliation(s)
- Samir Softic
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of Kentucky College of Medicine and Kentucky Children's Hospital, Lexington, KY, USA.,Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Boston, MA, USA
| | - Kimber L Stanhope
- Department of Molecular Biosciences, University of California, Davis, Davis, CA, USA
| | - Jeremie Boucher
- Bioscience Metabolism, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden.,The Lundberg Laboratory for Diabetes Research, University of Gothenburg, Gothenburg, Sweden.,Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Senad Divanovic
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Miguel A Lanaspa
- Division of Renal Diseases and Hypertension, University of Colorado, Aurora, CO, USA
| | - Richard J Johnson
- Division of Renal Diseases and Hypertension, University of Colorado, Aurora, CO, USA
| | - C Ronald Kahn
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Boston, MA, USA
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15
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Neuronal Protein Tyrosine Phosphatase 1B Hastens Amyloid β-Associated Alzheimer's Disease in Mice. J Neurosci 2020; 40:1581-1593. [PMID: 31915254 DOI: 10.1523/jneurosci.2120-19.2019] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 12/12/2019] [Accepted: 12/20/2019] [Indexed: 01/03/2023] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disorder, resulting in the progressive decline of cognitive function in patients. Familial forms of AD are tied to mutations in the amyloid precursor protein, but the cellular mechanisms that cause AD remain unclear. Inflammation and amyloidosis from amyloid β (Aβ) aggregates are implicated in neuron loss and cognitive decline. Inflammation activates the protein-tyrosine phosphatase 1B (PTP1B), and this could suppress many signaling pathways that activate glycogen synthase kinase 3β (GSK3β) implicated in neurodegeneration. However, the significance of PTP1B in AD pathology remains unclear. Here, we show that pharmacological inhibition of PTP1B with trodusquemine or selective ablation of PTP1B in neurons prevents hippocampal neuron loss and spatial memory deficits in a transgenic AD mouse model with Aβ pathology (hAPP-J20 mice of both sexes). Intriguingly, while systemic inhibition of PTP1B reduced inflammation in the hippocampus, neuronal PTP1B ablation did not. These results dissociate inflammation from neuronal loss and cognitive decline and demonstrate that neuronal PTP1B hastens neurodegeneration and cognitive decline in this model of AD. The protective effect of PTP1B inhibition or ablation coincides with the restoration of GSK3β inhibition. Neuronal ablation of PTP1B did not affect cerebral amyloid levels or plaque numbers, but reduced Aβ plaque size in the hippocampus. In summary, our preclinical study suggests that targeting PTP1B may be a new strategy to intervene in the progression of AD.SIGNIFICANCE STATEMENT Familial forms of Alzheimer's disease (AD) are tied to mutations in the amyloid precursor protein, but the cellular mechanisms that cause AD remain unclear. Here, we used a mouse model expressing human amyloid precursor protein bearing two familial mutations and asked whether activation of a phosphatase PTP1B participates in the disease process. Systemic inhibition of this phosphatase using a selective inhibitor prevented cognitive decline, neuron loss in the hippocampus, and attenuated inflammation. Importantly, neuron-targeted ablation of PTP1B also prevented cognitive decline and neuron loss but did not reduce inflammation. Therefore, neuronal loss rather than inflammation was critical for AD progression in this mouse model, and that disease progression could be ameliorated by inhibition of PTP1B.
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16
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Scotti L, Monteiro AFM, de Oliveira Viana J, Mendonça Junior FJB, Ishiki HM, Tchouboun EN, Santos R, Scotti MT. Multi-Target Drugs Against Metabolic Disorders. Endocr Metab Immune Disord Drug Targets 2020; 19:402-418. [PMID: 30556507 DOI: 10.2174/1871530319666181217123357] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/18/2018] [Accepted: 06/27/2018] [Indexed: 01/13/2023]
Abstract
BACKGROUND Metabolic disorders are a major cause of illness and death worldwide. Metabolism is the process by which the body makes energy from proteins, carbohydrates, and fats; chemically breaking these down in the digestive system towards sugars and acids which constitute the human body's fuel for immediate use, or to store in body tissues, such as the liver, muscles, and body fat. OBJECTIVE The efficiency of treatments for multifactor diseases has not been proved. It is accepted that to manage multifactor diseases, simultaneous modulation of multiple targets is required leading to the development of new strategies for discovery and development of drugs against metabolic disorders. METHODS In silico studies are increasingly being applied by researchers due to reductions in time and costs for new prototype synthesis; obtaining substances that present better therapeutic profiles. DISCUSSION In the present work, in addition to discussing multi-target drug discovery and the contributions of in silico studies to rational bioactive planning against metabolic disorders such as diabetes and obesity, we review various in silico study contributions to the fight against human metabolic pathologies. CONCLUSION In this review, we have presented various studies involved in the treatment of metabolic disorders; attempting to obtain hybrid molecules with pharmacological activity against various targets and expanding biological activity by using different mechanisms of action to treat a single pathology.
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Affiliation(s)
- Luciana Scotti
- Teaching and Research Management - University Hospital, Federal University of Paraíba, João Pessoa, PB, Brazil.,Postgraduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, Joao Pessoa, PB, Brazil
| | - Alex France Messias Monteiro
- Postgraduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, Joao Pessoa, PB, Brazil
| | - Jéssika de Oliveira Viana
- Postgraduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, Joao Pessoa, PB, Brazil
| | - Francisco Jaime Bezerra Mendonça Junior
- Postgraduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, Joao Pessoa, PB, Brazil.,Laboratory of Synthesis and Drug Delivery, Department of Biological Science, State University of Paraiba, Joao Pessoa, PB, Brazil
| | - Hamilton M Ishiki
- University of Western Sao Paulo (Unoeste), Presidente Prudente, SP, Brazil
| | | | - Rodrigo Santos
- Laboratory of Synthesis and Drug Delivery, Department of Biological Science, State University of Paraiba, Joao Pessoa, PB, Brazil
| | - Marcus Tullius Scotti
- Postgraduate Program in Natural and Synthetic Bioactive Products, Federal University of Paraiba, Joao Pessoa, PB, Brazil
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17
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Mohammed A, Ibrahim MA, Tajuddeen N, Aliyu AB, Isah MB. Antidiabetic potential of anthraquinones: A review. Phytother Res 2019; 34:486-504. [DOI: 10.1002/ptr.6544] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 10/03/2019] [Accepted: 10/19/2019] [Indexed: 01/03/2023]
Affiliation(s)
- Aminu Mohammed
- Department of BiochemistryAhmadu Bello University Zaria Nigeria
| | | | - Nasir Tajuddeen
- Department of ChemistryAhmadu Bello University Zaria Nigeria
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18
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Alam F, Shafique Z, Amjad ST, Bin Asad MHH. Enzymes inhibitors from natural sources with antidiabetic activity: A review. Phytother Res 2018; 33:41-54. [DOI: 10.1002/ptr.6211] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/10/2018] [Accepted: 09/13/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Fiaz Alam
- Department of Pharmacy COMSATS University Islamabad Pakistan
| | - Zainab Shafique
- Department of Pharmacy COMSATS University Islamabad Pakistan
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19
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Ito Y, Fukui M, Kanda M, Morishita K, Shoji Y, Kitao T, Hinoi E, Shirahase H. Therapeutic effects of the allosteric protein tyrosine phosphatase 1B inhibitor KY-226 on experimental diabetes and obesity via enhancements in insulin and leptin signaling in mice. J Pharmacol Sci 2018; 137:38-46. [DOI: 10.1016/j.jphs.2018.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 02/13/2018] [Accepted: 02/26/2018] [Indexed: 01/14/2023] Open
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20
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Wu J, Tao WW, Chong DY, Lai SS, Wang C, Liu Q, Zhang TY, Xue B, Li CJ. Early growth response-1 negative feedback regulates skeletal muscle postprandial insulin sensitivity via activating Ptp1b transcription. FASEB J 2018. [PMID: 29543533 DOI: 10.1096/fj.201701340r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Postprandial insulin desensitization plays a critical role in maintaining whole-body glucose homeostasis by avoiding the excessive absorption of blood glucose; however, the detailed mechanisms that underlie how the major player, skeletal muscle, desensitizes insulin action remain to be elucidated. Herein, we report that early growth response gene-1 ( Egr-1) is activated by insulin in skeletal muscle and provides feedback inhibition that regulates insulin sensitivity after a meal. The inhibition of the transcriptional activity of Egr-1 enhanced the phosphorylation of the insulin receptor (InsR) and Akt, thus increasing glucose uptake in L6 myotubes after insulin stimulation, whereas overexpression of Egr-1 decreased insulin sensitivity. Furthermore, deletion of Egr-1 in the skeletal muscle improved systemic insulin sensitivity and glucose tolerance, which resulted in lower blood glucose levels after refeeding. Mechanistic analysis demonstrated that EGR-1 inhibited InsR phosphorylation and glucose uptake in skeletal muscle by binding to the proximal promoter region of protein tyrosine phosphatase-1B (PTP1B) and directly activating transcription. PTP1B knockdown largely restored insulin sensitivity and enhanced glucose uptake, even under conditions of EGR-1 overexpression. Our results indicate that EGR-1/PTP1B signaling negatively regulates postprandial insulin sensitivity and suggest a potential therapeutic target for the prevention and treatment of excessive glucose absorption.-Wu, J., Tao, W.-W., Chong, D.-Y., Lai, S.-S., Wang, C., Liu, Q., Zhang, T.-Y., Xue, B., Li, C.-J. Early growth response-1 negative feedback regulates skeletal muscle postprandial insulin sensitivity via activating Ptp1b transcription.
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Affiliation(s)
- Jing Wu
- Medicine School of Nanjing University, Nanjing, China
| | - Wei-Wei Tao
- Model Animal Research Center, Nanjing University, Nanjing, China
| | - Dan-Yang Chong
- Model Animal Research Center, Nanjing University, Nanjing, China
| | - Shan-Shan Lai
- Model Animal Research Center, Nanjing University, Nanjing, China
| | - Chuang Wang
- Medicine School of Nanjing University, Nanjing, China
| | - Qi Liu
- Medicine School of Nanjing University, Nanjing, China
| | - Tong-Yu Zhang
- Model Animal Research Center, Nanjing University, Nanjing, China
| | - Bin Xue
- Medicine School of Nanjing University, Nanjing, China
| | - Chao-Jun Li
- Medicine School of Nanjing University, Nanjing, China.,Model Animal Research Center, Nanjing University, Nanjing, China
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21
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Jabeen M, Ahmad S, Shahid K, Sadiq A, Rashid U. Ursolic Acid Hydrazide Based Organometallic Complexes: Synthesis, Characterization, Antibacterial, Antioxidant, and Docking Studies. Front Chem 2018; 6:55. [PMID: 29594100 PMCID: PMC5857580 DOI: 10.3389/fchem.2018.00055] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 02/22/2018] [Indexed: 11/29/2022] Open
Abstract
In thecurrent research work,eleven metal complexes were synthesized from the hydrazide derivative of ursolic acid. Metal complexes of tin, antimony and iron were synthesized and characterized by FT-IR and NMR spectroscopy. The antibacterial and antioxidant activities were performed for these complexes, which revealed that the metal complexes synthesized are more potent than their parent compounds. We observed that antioxidant activity showed by triphenyltin complex was significant and least activity have been shown by antimony trichloride complex. The synthesized metal complexes were then evaluated against two Gram-negative and two Gram-positive bacterial strains. Triphenyl tin complex emerged as potent antibacterial agent with MIC value of 8 μg/ml each against Shigellaspp, Salmonella typhi and Staphylococcus aureus. While, the MIC value against Streptococcus pneumoniae is 4 μg/ml. Computational docking studies were carried out on molecular targets to interpret the results of antioxidant and antibacterial activities. Based on the results, it may be inferred that the metal complexes of ursolic acid are more active as compared to the parent drug and may be proved for some other pharmacological potential by further analysis.
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Affiliation(s)
- Muafia Jabeen
- Department of Pharmaceutical Chemistry, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan
| | - Sajjad Ahmad
- Department of Pharmacy, University of Malakand, Chakdara, Pakistan
| | - Khadija Shahid
- Department of Pharmaceutical Chemistry, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan
| | - Abdul Sadiq
- Department of Pharmacy, University of Malakand, Chakdara, Pakistan
| | - Umer Rashid
- Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad, Pakistan
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22
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Insulin resistance in 3T3-L1 adipocytes by TNF-α is improved by punicic acid through upregulation of insulin signalling pathway and endocrine function, and downregulation of proinflammatory cytokines. Biochimie 2018; 146:79-86. [DOI: 10.1016/j.biochi.2017.11.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 11/21/2017] [Indexed: 01/26/2023]
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23
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Duan X, Meng Q, Wang C, Liu Z, Sun H, Huo X, Sun P, Ma X, Peng J, Liu K. Effects of calycosin against high-fat diet-induced nonalcoholic fatty liver disease in mice. J Gastroenterol Hepatol 2018; 33:533-542. [PMID: 28699662 DOI: 10.1111/jgh.13884] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 07/03/2017] [Accepted: 07/10/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIM Nonalcoholic fatty liver disease (NAFLD) has become a major health concern worldwide. The present study was designed to investigate the effects of calycosin against high-fat diet (HFD)-induced NAFLD in mice. METHODS C57BL/6 J male mice were fed with HFD to induce NAFLD model and treated with or without calycosin for 12 weeks. The levels of ALT, AST, insulin, and adiponectin were measured using biochemical methods. Hemotoxylin and eosin staining and Oil Red O staining were used to determine the liver histopathology changes and measure the degree of lipid accumulation respectively. Glucose tolerance tests and insulin tolerance tests were performed followed by quantitative insulin sensitivity check index determination. Western blot and quantitative real-time polymerase chain reaction were used to explore the potential mechanism involved in the beneficial effects of calycosin. RESULTS Calycosin effectively decreased the levels of ALT and AST, increased the levels of adiponectin and insulin. Hemotoxylin and eosin staining indicated calycosin treatment remarkably improved liver injury. Oil Red O staining indicated calycosin treatment remarkably improved lipid accumulation. Quantitative insulin sensitivity check index in HFD fed mice was significantly lower than in the standard chow fed mice. Further, calycosin suppressed phosphoenolpyruvate carboxykinase, glucose-6-phosphatase, sterol-regulatory element binding protein 1c, and FASN involved in gluconeogenesis and triglyceride synthesis. Calycosin increased glycogen synthase kinase 3 beta, glucose transporter 4, and phosphorylated insulin receptor substrates 1 and 2 expressions involved in glucose metabolism. The aforementioned beneficial effects of calycosin against HFD-induced NAFLD may be attributed to farnesoid X receptor activation. CONCLUSION Calycosin could produce the favorable effects against HFD-induced NAFLD in mice.
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Affiliation(s)
- Xingping Duan
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Department of Pharmacy, Maternal and Child Health Care Hospital of Zigong, Zigong, Sichuan, China
| | - Qiang Meng
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, China
| | - Changyuan Wang
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, China
| | - Zhihao Liu
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, China
| | - Huijun Sun
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, China
| | - Xiaokui Huo
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, China
| | - Pengyuan Sun
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, China
| | - Xiaodong Ma
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China
| | - Jinyong Peng
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, China
| | - Kexin Liu
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, China.,Provincial Key Laboratory for Pharmacokinetics and Transport, Liaoning, China
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24
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García-Ruiz I, Solís-Muñoz P, Fernández-Moreira D, Grau M, Muñoz-Yagüe MT, Solís-Herruzo JA. Omentectomy Prevents Metabolic Syndrome By Reducing Appetite and Body Weight In A Diet-Induced Obesity Rat Model. Sci Rep 2018; 8:1540. [PMID: 29367725 PMCID: PMC5784083 DOI: 10.1038/s41598-018-19973-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 10/11/2017] [Indexed: 12/17/2022] Open
Abstract
Visceral fat deposition is associated with impairment of glucose and lipid metabolism while leptin levels are frequently related to subcutaneous fat area. At present, there is considerable controversy regarding the role of visceral adipose tissue accumulation in the development of metabolic syndrome (MS). Here we show the effects of omentectomy on the liver and MS in a diet induced obesity rat model. Our results reveal that undergoing omentectomy previously the establishment of the diet-induced-obesity reduced significantly body weight gain and avoid the development of MS, including non-alcoholic fatty liver disease. Intriguingly, the significantly lower body weight gain was due to decreased food intake. Omentum drives obesity progression through leptin resistance mediated by C-reactive protein, Interleucin (IL)-6 and high lipolysis activity. Omentum removal reversed immediately the increased plasma levels of CRP and IL-6 and gradually food intake, weight gain, and features of MS in diet-induced-obesity. Omentectomy caused no changes in normal-weigh-rats. This report displays causal mechanism by which omentum promotes obesity and propose omentectomy as a promising procedure in MS prevention.
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Affiliation(s)
- Inmaculada García-Ruiz
- Gastroenterology and Hepatology Laboratory, Research Institute, University Hospital "12 de Octubre". Universidad Complutense, 28041, Madrid, Spain. .,Translational Oncology, Instituto de Investigación Hospital 12 de Octubre (i+12), Avda de Córdoba s/n, 28041, Madrid, Spain.
| | - Pablo Solís-Muñoz
- Institute of Liver Studies, King's College Hospital, SE5 9RS, London, United Kingdom
| | - Daniel Fernández-Moreira
- Department of Bromatology and Food Hygiene, Military Center of Veterinary of Defense, 28024, Madrid, Spain
| | - Montserrat Grau
- Gastroenterology and Hepatology Laboratory, Research Institute, University Hospital "12 de Octubre". Universidad Complutense, 28041, Madrid, Spain
| | - Maria Teresa Muñoz-Yagüe
- Gastroenterology and Hepatology Laboratory, Research Institute, University Hospital "12 de Octubre". Universidad Complutense, 28041, Madrid, Spain
| | - José A Solís-Herruzo
- Gastroenterology and Hepatology Laboratory, Research Institute, University Hospital "12 de Octubre". Universidad Complutense, 28041, Madrid, Spain
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25
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Yang Z, Wu F, He Y, Zhang Q, Zhang Y, Zhou G, Yang H, Zhou P. A novel PTP1B inhibitor extracted fromGanoderma lucidumameliorates insulin resistance by regulating IRS1-GLUT4 cascades in the insulin signaling pathway. Food Funct 2018; 9:397-406. [PMID: 29215104 DOI: 10.1039/c7fo01489a] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A schematic diagram showing the IRS1-GLUT4 insulin signaling pathway influenced by PTP1B and FYGL in L6 cells.
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Affiliation(s)
- Zhou Yang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Fan Wu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Yanming He
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 200437
- P. R. China
| | - Qiang Zhang
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 200437
- P. R. China
| | - Yuan Zhang
- Department of Medicine
- St Vincent's Hospital
- University of Melbourne
- Fitzroy
- Australia
| | - Guangrong Zhou
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
| | - Hongjie Yang
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine
- Shanghai University of Traditional Chinese Medicine
- Shanghai 200437
- P. R. China
| | - Ping Zhou
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- P. R. China
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26
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Vieira MNN, Lima-Filho RAS, De Felice FG. Connecting Alzheimer's disease to diabetes: Underlying mechanisms and potential therapeutic targets. Neuropharmacology 2017; 136:160-171. [PMID: 29129775 DOI: 10.1016/j.neuropharm.2017.11.014] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/07/2017] [Accepted: 11/08/2017] [Indexed: 12/31/2022]
Abstract
Alzheimer's disease (AD) is a risk factor for type 2 diabetes and vice versa, and a growing body of evidence indicates that these diseases are connected both at epidemiological, clinical and molecular levels. Recent studies have begun to reveal common pathogenic mechanisms shared by AD and type 2 diabetes. Impaired neuronal insulin signaling and endoplasmic reticulum (ER) stress are present in animal models of AD, similar to observations in peripheral tissue in T2D. These findings shed light into novel diabetes-related mechanisms leading to brain dysfunction in AD. Here, we review the literature on selected mechanisms shared between these diseases and discuss how the identification of such mechanisms may lead to novel therapeutic targets in AD. This article is part of the Special Issue entitled 'Metabolic Impairment as Risk Factors for Neurodegenerative Disorders.'
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Affiliation(s)
- Marcelo N N Vieira
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil.
| | - Ricardo A S Lima-Filho
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil.
| | - Fernanda G De Felice
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil; Centre for Neuroscience Studies, Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada.
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Exploring sulfonate esters of 5-arylidene thiazolidine-2,4-diones as PTP1B inhibitors with anti-hyperglycemic activity. Med Chem Res 2017. [DOI: 10.1007/s00044-017-2074-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Sharma BR, Kim HJ, Rhyu DY. Caulerpa lentillifera inhibits protein-tyrosine phosphatase 1B and protects pancreatic beta cell via its insulin mimetic effect. Food Sci Biotechnol 2017; 26:495-499. [PMID: 30263570 DOI: 10.1007/s10068-017-0068-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/28/2016] [Accepted: 01/12/2017] [Indexed: 12/28/2022] Open
Abstract
The aim of this study was to determine whether Caulerpa lentillifea extract (CLE) can protect pancreatic beta cells and enhance insulin signaling in adipocytes. We measured the protein tyrosine phosphatase (PTP)-1B inhibitory effect of CLE using an in-vitro enzyme assay. Proteins involved in the pancreatic beta-cell death and insulin signaling were measured by western blotting. Oil-red O staining was used to measure the insulin mimetic effect of CLE. CLE strongly inhibited the PTP1B enzyme. In rat insulinoma (RIN)-m5F cells, CLE decreased the activation of extracellular regulated kinase (ERK)-1/2, P38 mitogen activated protein kinase (P38), c-Jun NH2-terminal kinase (JNK), and nuclear factor kappa-light-chain-enhancer of the activated B cells (NF-κB). Furthermore, CLE showed insulin-mimetic effect and enhanced the activation of insulin-signaling molecules including IRS, AKT, PI3K, and GSK-3β in 3T3-L1 adipocytes. Our results suggested that CLE-inhibited PTP1B, protected the pancreatic beta cells, and enhanced insulin sensitization in the adipocytes.
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Affiliation(s)
- Bhesh Raj Sharma
- 1Department of Oriental Medicine Resources and Institute of Korean Medicine Industry, Mokpo National University, Muan, Jeonnam, 58554 Korea
| | - Hyun Jung Kim
- 2College of Pharmacy, Mokpo National University, Muan, Jeonnam, 58554 Korea
| | - Dong Young Rhyu
- 1Department of Oriental Medicine Resources and Institute of Korean Medicine Industry, Mokpo National University, Muan, Jeonnam, 58554 Korea
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Vieira MNN, Lyra E Silva NM, Ferreira ST, De Felice FG. Protein Tyrosine Phosphatase 1B (PTP1B): A Potential Target for Alzheimer's Therapy? Front Aging Neurosci 2017; 9:7. [PMID: 28197094 PMCID: PMC5281585 DOI: 10.3389/fnagi.2017.00007] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 01/12/2017] [Indexed: 01/21/2023] Open
Abstract
Despite significant advances in current understanding of mechanisms of pathogenesis in Alzheimer's disease (AD), attempts at drug development based on those discoveries have failed to translate into effective, disease-modifying therapies. AD is a complex and multifactorial disease comprising a range of aberrant cellular/molecular processes taking part in different cell types and brain regions. As a consequence, therapeutics for AD should be able to block or compensate multiple abnormal pathological events. Here, we examine recent evidence that inhibition of protein tyrosine phosphatase 1B (PTP1B) may represent a promising strategy to combat a variety of AD-related detrimental processes. Besides its well described role as a negative regulator of insulin and leptin signaling, PTB1B recently emerged as a modulator of various other processes in the central nervous system (CNS) that are also implicated in AD. These include signaling pathways germane to learning and memory, regulation of synapse dynamics, endoplasmic reticulum (ER) stress and microglia-mediated neuroinflammation. We propose that PTP1B inhibition may represent an attractive and yet unexplored therapeutic approach to correct aberrant signaling pathways linked to AD.
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Affiliation(s)
- Marcelo N N Vieira
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de JaneiroRio de Janeiro, Brazil; Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de JaneiroRio de Janeiro, Brazil
| | - Natalia M Lyra E Silva
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Sergio T Ferreira
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de JaneiroRio de Janeiro, Brazil; Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de JaneiroRio de Janeiro, Brazil
| | - Fernanda G De Felice
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de JaneiroRio de Janeiro, Brazil; Centre for Neuroscience Studies, Department of Biomedical and Molecular Sciences, Queen's UniversityKingston, ON, Canada
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Mahapatra MK, Kumar R, Kumar M. Synthesis, biological evaluation and in silico studies of 5-(3-methoxybenzylidene)thiazolidine-2,4-dione analogues as PTP1B inhibitors. Bioorg Chem 2017; 71:1-9. [PMID: 28126289 DOI: 10.1016/j.bioorg.2017.01.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 10/05/2016] [Accepted: 01/15/2017] [Indexed: 02/07/2023]
Abstract
PTP1B (protein tyrosine phosphatase 1B) dephosphorylates the insulin receptor substrate and thus acts as a negative regulator of the insulin and leptin signalling pathway. Recently, it has been considered as a new therapeutic target of intervention for the treatment of type2 diabetes. A series of aryl/alkylsulfonyloxy-5-(3-methoxybenzylidene)thiazolidine-2,4-dione derivatives were synthesized, screened in vitro for their PTP1B inhibitory activity and in vivo for anti-hyperglycaemic activity. Docking results further helped in understanding the nature of interactions governing the binding mode of ligands inside the active site of PTP1B. Among the synthesized compounds, 13 and 16 were found to be potent PTP1B inhibitors having IC50 of 7.31 and 8.73μM respectively. Significant lowering of blood glucose level was observed in some of the synthesized compounds in in vivo study.
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Affiliation(s)
- Manoj Kumar Mahapatra
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India
| | - Rajnish Kumar
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India
| | - Manoj Kumar
- University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160014, India.
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Wang L, Cheng J, Wang S, Zhang X, Cai, X. Screening of inhibitors of Taenia solium glycogen synthase Kinase-3β. RSC Adv 2017. [DOI: 10.1039/c7ra05873j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
A flow chart of the screening of lead compounds.
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Affiliation(s)
- Li Wang
- College of Veterinary Medicine
- Jilin University
- Changchun 130062
- China
- State Key Laboratory of Veterinary Etiological Biology
| | - Jiagao Cheng
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Shuai Wang
- State Key Laboratory of Veterinary Etiological Biology
- Lanzhou Veterinary Research Institute
- Chinese Academy of Agricultural Sciences
- Lanzhou 730046
- China
| | - Xichen Zhang
- College of Veterinary Medicine
- Jilin University
- Changchun 130062
- China
| | - Xuepeng Cai,
- College of Veterinary Medicine
- Jilin University
- Changchun 130062
- China
- State Key Laboratory of Veterinary Etiological Biology
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Promising Inhibitory Effects of Anthraquinones, Naphthopyrone, and Naphthalene Glycosides, from Cassia obtusifolia on α-Glucosidase and Human Protein Tyrosine Phosphatases 1B. Molecules 2016; 22:molecules22010028. [PMID: 28035984 PMCID: PMC6155831 DOI: 10.3390/molecules22010028] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 12/22/2016] [Accepted: 12/23/2016] [Indexed: 11/18/2022] Open
Abstract
The present work aims to evaluate the anti-diabetic potentials of 16 anthraquinones, two naphthopyrone glycosides, and one naphthalene glycoside from Cassia obtusifolia via inhibition against the protein tyrosine phosphatases 1B (PTP1B) and α-glucosidase. Among them, anthraquinones emodin and alaternin exhibited the highest inhibitory activities on PTP1B and α-glucosidase, respectively. Moreover, we examined the effects of alaternin and emodin on stimulation of glucose uptake by insulin-resistant human HepG2 cells. The results showed that alaternin and emodin significantly increased the insulin-provoked glucose uptake. In addition, our kinetic study revealed that alaternin competitively inhibited PTP1B, and showed mixed-type inhibition against α-glucosidase. In order to confirm enzyme inhibition, we predicted the 3D structure of PTP1B using Autodock 4.2 to simulate the binding of alaternin. The docking simulation results demonstrated that four residues of PTP1B (Gly183, Arg221, Ile219, Gly220) interact with three hydroxyl groups of alaternin and that the binding energy was negative (−6.30 kcal/mol), indicating that the four hydrogen bonds stabilize the open form of the enzyme and potentiate tight binding of the active site of PTP1B, resulting in more effective PTP1B inhibition. The results of the present study clearly demonstrate that C. obtusifolia and its constituents have potential anti-diabetic activity and can be used as a functional food for the treatment of diabetes and associated complications.
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Chen L, Tian G, Tang W, Luo W, Liu P, Ma Z. Protective effect of luteolin on streptozotocin-induced diabetic renal damage in mice via the regulation of RIP140/NF-кB pathway and insulin signalling pathway. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.01.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Khodabandehloo H, Gorgani-Firuzjaee S, Panahi G, Meshkani R. Molecular and cellular mechanisms linking inflammation to insulin resistance and β-cell dysfunction. Transl Res 2016; 167:228-56. [PMID: 26408801 DOI: 10.1016/j.trsl.2015.08.011] [Citation(s) in RCA: 193] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 08/29/2015] [Accepted: 08/31/2015] [Indexed: 12/13/2022]
Abstract
Obesity is a major public health problem worldwide, and it is associated with an increased risk of developing type 2 diabetes. It is now commonly accepted that chronic inflammation associated with obesity induces insulin resistance and β-cell dysfunction in diabetic patients. Obesity-associated inflammation is characterized by increased abundance of macrophages and enhanced production of inflammatory cytokines in adipose tissue. Adipose tissue macrophages are suggested to be the major source of local and systemic inflammatory mediators such as tumor necrosis factor α, interleukin (IL)-1β, and IL-6. These cytokines induce insulin resistance in insulin target tissues by activating the suppressors of cytokine signaling proteins, several kinases such as c-Jun N-terminal kinase, IκB kinase β, and protein kinase C, inducible nitric oxide synthase, extracellular signal-regulated kinase, and protein tyrosine phosphatases such as protein tyrosine phosphatase 1B. These activated factors impair the insulin signaling at the insulin receptor and the insulin receptor substrates levels. The same process most likely occurs in the pancreas as it contains a pool of tissue-resident macrophages. High concentrations of glucose or palmitate via the chemokine production promote further immune cell migration and infiltration into the islets. These events ultimately induce inflammatory responses leading to the apoptosis of the pancreatic β cells. In this review, the cellular and molecular players that participate in the regulation of obesity-induced inflammation are discussed, with particular attention being placed on the roles of the molecular players linking inflammation to insulin resistance and β-cell dysfunction.
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Affiliation(s)
- Hadi Khodabandehloo
- Department of Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Sattar Gorgani-Firuzjaee
- Department of Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Ghodratollah Panahi
- Department of Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Reza Meshkani
- Department of Biochemistry, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran.
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Chen PJ, Cai SP, Huang C, Meng XM, Li J. Protein tyrosine phosphatase 1B (PTP1B): A key regulator and therapeutic target in liver diseases. Toxicology 2015; 337:10-20. [PMID: 26299811 DOI: 10.1016/j.tox.2015.08.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 08/12/2015] [Accepted: 08/15/2015] [Indexed: 12/11/2022]
Abstract
Phosphorylation of tyrosine residues within proteins, which is controlled by the reciprocal action of protein tyrosine kinases and protein tyrosine phosphatases, plays a key role in regulating almost all physiological responses. Therefore, it comes as no surprise that once the balance of tyrosine phosphorylation is disturbed, drastic effects can occur. Protein tyrosine phosphatase 1B (PTP1B), a classical non-transmembrane tyrosine phosphatase, is a pivotal regulator and promising drug target in type 2 diabetes and obesity. Recently it has received renewed attention in liver diseases and represents an intriguing opportunity as a drug target by modulating hepatocyte death and survival, hepatic lipogenesis and so on. Here, the multiple roles of PTP1B in liver diseases will be presented, with respect to liver regeneration, drug-induced liver disease, non-alcoholic fatty liver disease (NAFLD) and hepatocellular carcinoma.
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Affiliation(s)
- Pei-Jie Chen
- School of Pharmacy, Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Shuang-Peng Cai
- School of Pharmacy, Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Cheng Huang
- School of Pharmacy, Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Xiao-Ming Meng
- School of Pharmacy, Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Jun Li
- School of Pharmacy, Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China.
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Altaf QA, Barnett AH, Tahrani AA. Novel therapeutics for type 2 diabetes: insulin resistance. Diabetes Obes Metab 2015; 17:319-34. [PMID: 25308775 DOI: 10.1111/dom.12400] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 09/23/2014] [Accepted: 10/04/2014] [Indexed: 12/19/2022]
Abstract
Insulin resistance (IR) plays an important role in the pathogenesis of type 2 diabetes (T2D) and cardiovascular disease. Hence improving IR is a major target of treatment in patients with T2D. Obesity and lack of exercise are major causes of IR. However, recent evidence implicates sleep disorders and disorders of the circadian rhythm in the pathogenesis of IR. Weight loss and lifestyle changes are the cornerstone and most effective treatments of IR, but adherence and patient's acceptability are poor. Bariatric surgery results in significant and sustainable long-term weight loss associated with beneficial impact on IR and glucose metabolism, making this an attractive treatment option for patients with T2D. Currently available pharmacological options targeting IR (such as metformin and thiazolidinediones) do not maintain glycaemic measures within targets long term and can be associated with significant side effects. Over the last two decades, many pharmacological agents targeting different aspects of the insulin signalling pathway were developed to improve IR, but only a minority reached clinical trials. Such treatments need to be specific and reversible as many of the components of the insulin signalling pathway are involved in other cellular functions such as apoptosis. Recent evidence highlighted the role of circadian rhythm and sleep-related disorders in the pathogenesis of IR. In this article, we review the latest developments in the pharmacological and non-pharmacological interventions targeting IR including bariatric surgery. We will also review the role of circadian rhythm and sleep-related disorders in the development and treatment of IR.
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Affiliation(s)
- Q-A Altaf
- Department of Diabetes and Endocrinology, Heart of England NHS Foundation Trust, Birmingham, UK; Centre of Endocrinology, Diabetes and Metabolism, University of Birmingham, Birmingham, UK
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Liu ZQ, Liu T, Chen C, Li MY, Wang ZY, Chen RS, Wei GX, Wang XY, Luo DQ. Fumosorinone, a novel PTP1B inhibitor, activates insulin signaling in insulin-resistance HepG2 cells and shows anti-diabetic effect in diabetic KKAy mice. Toxicol Appl Pharmacol 2015; 285:61-70. [PMID: 25796170 DOI: 10.1016/j.taap.2015.03.011] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 03/03/2015] [Accepted: 03/10/2015] [Indexed: 10/23/2022]
Abstract
Insulin resistance is a characteristic feature of type 2 diabetes mellitus (T2DM) and is characterized by defects in insulin signaling. Protein tyrosine phosphatase 1B (PTP1B) is a key negative regulator of the insulin signaling pathways, and its increased activity and expression are implicated in the pathogenesis of insulin resistance. Therefore, the inhibition of PTP1B is anticipated to become a potential therapeutic strategy to treat T2DM. Fumosorinone (FU), a new natural product isolated from insect fungi Isaria fumosorosea, was found to inhibit PTP1B activity in our previous study. Herein, the effects of FU on insulin resistance and mechanism in vitro and in vivo were investigated. FU increased the insulin-provoked glucose uptake in insulin-resistant HepG2 cells, and also reduced blood glucose and lipid levels of type 2 diabetic KKAy mice. FU decreased the expression of PTP1B both in insulin-resistant HepG2 cells and in liver tissues of diabetic KKAy mice. Furthermore, FU increased the phosphorylation of IRβ, IRS-2, Akt, GSK3β and Erk1/2 in insulin-resistant HepG2 cells, as well as the phosphorylation of IRβ, IRS-2, Akt in liver tissues of diabetic KKAy mice. These results showed that FU increased glucose uptake and improved insulin resistance by down-regulating the expression of PTP1B and activating the insulin signaling pathway, suggesting that it may possess antidiabetic properties.
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Affiliation(s)
- Zhi-Qin Liu
- College of Life Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, PR China; College of Pharmaceutical Sciences, key laboratory of pharmaceutical quality control of Hebei province, Hebei University, Baoding 071002, PR China
| | - Ting Liu
- College of Life Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, PR China
| | - Chuan Chen
- College of Life Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, PR China
| | - Ming-Yan Li
- College of Pharmaceutical Sciences, key laboratory of pharmaceutical quality control of Hebei province, Hebei University, Baoding 071002, PR China
| | - Zi-Yu Wang
- College of Pharmaceutical Sciences, key laboratory of pharmaceutical quality control of Hebei province, Hebei University, Baoding 071002, PR China
| | - Ruo-Song Chen
- College of Pharmaceutical Sciences, key laboratory of pharmaceutical quality control of Hebei province, Hebei University, Baoding 071002, PR China
| | - Gui-Xiang Wei
- College of Pharmaceutical Sciences, key laboratory of pharmaceutical quality control of Hebei province, Hebei University, Baoding 071002, PR China
| | - Xiao-Yi Wang
- College of Pharmaceutical Sciences, key laboratory of pharmaceutical quality control of Hebei province, Hebei University, Baoding 071002, PR China
| | - Du-Qiang Luo
- College of Life Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, PR China.
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MATYSZEWSKI ARTUR, CZARNECKA ANNAM, SOLAREK WOJCIECH, KORZEŃ PIOTR, SAFIR ILANJ, KUKWA WOJCIECH, SZCZYLIK CEZARY. Molecular basis of carcinogenesis in diabetic patients (Review). Int J Oncol 2015; 46:1435-43. [DOI: 10.3892/ijo.2015.2865] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 12/10/2014] [Indexed: 11/05/2022] Open
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Gurzov EN, Stanley WJ, Brodnicki TC, Thomas HE. Protein tyrosine phosphatases: molecular switches in metabolism and diabetes. Trends Endocrinol Metab 2015; 26:30-9. [PMID: 25432462 DOI: 10.1016/j.tem.2014.10.004] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 10/28/2014] [Accepted: 10/30/2014] [Indexed: 02/06/2023]
Abstract
Protein tyrosine phosphatases (PTPs) are a large family of enzymes that generally oppose the actions of protein tyrosine kinases (PTKs). Genetic polymorphisms for particular PTPs are associated with altered risk of both type 1 diabetes (T1D) and type 2 diabetes (T2D). Moreover, recent evidence suggests that PTPs play crucial roles in metabolism. They can act as regulators of liver homeostasis, food intake, or immune-mediated pancreatic b cell death. In this review we describe the mechanisms by which different members of the non-receptor PTP (PTPN) family influence metabolic physiology. This 'metabolic job' of PTPs is discussed in depth and the role of these proteins in different cell types compared. Understanding the pathways regulated by PTPs will provide novel therapeutic strategies for the treatment of diabetes.
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Meshkani R, Sadeghi A, Taheripak G, Zarghooni M, Gerayesh-Nejad S, Bakhtiyari S. Rosiglitazone, a PPARγagonist, ameliorates palmitate-induced insulin resistance and apoptosis in skeletal muscle cells. Cell Biochem Funct 2014; 32:683-91. [DOI: 10.1002/cbf.3072] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 10/04/2014] [Accepted: 10/06/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Reza Meshkani
- Department of Biochemistry, Faculty of Medicine; Tehran University of Medical Sciences; Tehran IR Iran
| | - Asie Sadeghi
- Department of Biochemistry, Faculty of Medicine; Tehran University of Medical Sciences; Tehran IR Iran
| | - Gholamreza Taheripak
- Department of Biochemistry, Faculty of Medicine; Tehran University of Medical Sciences; Tehran IR Iran
| | | | - Siavash Gerayesh-Nejad
- Department of Biochemistry, Faculty of Medicine; Tehran University of Medical Sciences; Tehran IR Iran
| | - Salar Bakhtiyari
- Department of Clinical Biochemistry, Faculty of Medicine; Ilam University of Medical Sciences; Ilam IR Iran
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Xiao P, Wang X, Wang HM, Fu XL, Cui FA, Yu X, Wen SS, Bi WX, Sun JP. The second-sphere residue T263 is important for the function and catalytic activity of PTP1B via interaction with the WPD-loop. Int J Biochem Cell Biol 2014; 57:84-95. [PMID: 25450460 DOI: 10.1016/j.biocel.2014.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 09/21/2014] [Accepted: 10/04/2014] [Indexed: 10/24/2022]
Abstract
Protein tyrosine phosphatases have diverse substrate specificities and intrinsic activities that lay the foundations for the fine-tuning of a phosphorylation network to precisely regulate cellular signal transduction. All classical PTPs share common catalytic mechanisms, and the important catalytic residues in the first sphere of their active sites have been well characterized. However, little attention has been paid to the second-sphere residues that are potentially important in defining the intrinsic activity and substrate specificity of PTPs. Here, we find that a conserved second-sphere residue, Thr263, located in the surface Q-loop is important for both the function and activity of PTPs. Using PTP1B as a study model, we found that mutations of Thr263 impaired the negative regulation role of PTP1B in insulin signaling. A detailed mechanistic study utilizing steady-state kinetics, Brønsted analysis and pH dependence in the presence of pNPP or phosphopeptide substrates revealed that Thr263 is required for the stabilization of the leaving group during catalysis. Further crystallographic studies and structural comparison revealed that Thr263 regulates the general acid function through modulation of the WPD-loop by the T263:F182/Y/H interaction pair, which is conserved in 26 out of 32 classical PTPs. In addition, the hydrophobic interaction between Thr263 and Arg1159 of the insulin receptor contributes to the substrate specificity of PTP1B. Taken together, our findings demonstrate the general role of the second-sphere residue Thr263 in PTP catalysis. Our findings suggest that the second sphere residues of PTP active site may play important roles in PTP-mediated function in both normal and diseased states.
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Affiliation(s)
- Peng Xiao
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, Shandong University, School of Medicine, Jinan, Shandong, China; Shandong Provincial School Key Laboratory for Protein Science of Chronic Degenerative Diseases, Jinan, Shandong, China
| | - Xiao Wang
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, Shandong University, School of Medicine, Jinan, Shandong, China; Shandong Provincial School Key Laboratory for Protein Science of Chronic Degenerative Diseases, Jinan, Shandong, China
| | - Hong-Mei Wang
- Shandong Provincial School Key Laboratory for Protein Science of Chronic Degenerative Diseases, Jinan, Shandong, China; Department of Physiology, Shandong University, School of Medicine, Jinan, Shandong, China
| | - Xiao-Lei Fu
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, Shandong University, School of Medicine, Jinan, Shandong, China; Shandong Provincial School Key Laboratory for Protein Science of Chronic Degenerative Diseases, Jinan, Shandong, China; Department of Public Health, Shandong University, School of Medicine, Jinan, Shandong, China
| | - Fu-ai Cui
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, Shandong University, School of Medicine, Jinan, Shandong, China
| | - Xiao Yu
- Shandong Provincial School Key Laboratory for Protein Science of Chronic Degenerative Diseases, Jinan, Shandong, China; Department of Public Health, Shandong University, School of Medicine, Jinan, Shandong, China
| | - Shi-shuai Wen
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, Shandong University, School of Medicine, Jinan, Shandong, China; Shandong Provincial School Key Laboratory for Protein Science of Chronic Degenerative Diseases, Jinan, Shandong, China
| | - Wen-Xiang Bi
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, Shandong University, School of Medicine, Jinan, Shandong, China.
| | - Jin-Peng Sun
- Key Laboratory Experimental Teratology of the Ministry of Education and Department of Biochemistry and Molecular Biology, Shandong University, School of Medicine, Jinan, Shandong, China; Shandong Provincial School Key Laboratory for Protein Science of Chronic Degenerative Diseases, Jinan, Shandong, China; Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China.
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Ding H, Zhang Y, Xu C, Hou D, Li J, Zhang Y, Peng W, Zen K, Zhang CY, Jiang X. Norathyriol reverses obesity- and high-fat-diet-induced insulin resistance in mice through inhibition of PTP1B. Diabetologia 2014; 57:2145-54. [PMID: 24985145 DOI: 10.1007/s00125-014-3315-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/06/2014] [Indexed: 12/17/2022]
Abstract
AIM/HYPOTHESIS Protein tyrosine phosphatase 1B (PTP1B) negatively regulates insulin signalling. PTP1B deficiency improves obesity-induced insulin resistance and consequently improves type 2 diabetes in mice. Here, the small molecule norathyriol reversed obesity- and high-fat-diet-induced insulin resistance by inhibiting PTP1B. METHODS The inhibitory mode of PTP1B was evaluated by using the double-reciprocal substrate in the presence of norathyriol. Primary cultured hepatocytes, myoblasts and white adipocytes were used to investigate the effect of norathyriol on insulin signalling. Glucose homeostasis and insulin sensitivity were characterised by glucose and insulin tolerance tests. RESULTS Norathyriol was identified as a competitive inhibitor of PTP1B, with an IC50 of 9.59 ± 0.39 μmol/l. In cultured hepatocytes and myoblasts, norathyriol treatment blocked the PTP1B-mediated dephosphorylation of the insulin receptor. Intraperitoneal injection of norathyriol inhibited liver and muscle PTP1B activity in mice, thus contributing to the improved glucose homeostasis and insulin sensitivity. However, these beneficial effects were abolished in PTP1B-deficient mice. Notably, oral administration of norathyriol protected mice from diet-induced obesity and insulin resistance through inhibition of hypothalamic PTP1B activity. CONCLUSIONS/INTERPRETATION Our results indicate that the small molecule norathyriol is a potent PTP1B inhibitor with good cell permeability and oral availability.
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Affiliation(s)
- Hanying Ding
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, Nanjing, Jiangsu, People's Republic of China
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Chromium-containing traditional Chinese medicine, Tianmai Xiaoke Tablet improves blood glucose through activating insulin-signaling pathway and inhibiting PTP1B and PCK2 in diabetic rats. JOURNAL OF INTEGRATIVE MEDICINE-JIM 2014; 12:162-70. [PMID: 24735788 DOI: 10.1016/s2095-4964(14)60020-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Chromium is an essential mineral that is thought to be necessary for normal glucose homeostasis. Numerous studies give evidence that chromium picolinate can modulate blood glucose and insulin resistance. The main ingredient of Tianmai Xiaoke (TMXK) Tablet is chromium picolinate. In China, TMXK Tablet is used to treat type 2 diabetes. This study investigated the effect of TMXK on glucose metabolism in diabetic rats to explore possible underlying molecular mechanisms for its action. METHODS Diabetes was induced in rats by feeding a high-fat diet and subcutaneously injection with a single dose of streptozotocin (50 mg/kg, tail vein). One week after streptozotocin-injection, model rats were divided into diabetic group, low dose of TMXK group and high dose of TMXK group. Eight normal rats were used as normal control. After 8 weeks of treatment, skeletal muscle was obtained and was analyzed using Roche NimbleGen mRNA array and quantitative polymerase chain reaction (qPCR). Fasting blood glucose, oral glucose tolerance test and homeostasis model assessment of insulin resistance (HOMA-IR) index were also measured. RESULTS The authors found that the administration of TMXK Tablet can reduce the fasting blood glucose and fasting insulin level and HOMA-IR index. The authors also found that 2 223 genes from skeletal muscle of the high-dose TMXK group had significant changes in expression (1 752 increased, 471 decreased). Based on Kyoto encyclopedia of genes and genomes pathway analysis, the most three significant pathways were "insulin signaling pathway", "glycolysis/gluconeogenesis" and "citrate cycle (TCA)". qPCR showed that relative levels of forkhead box O3 (FoxO3), phosphoenolpyruvate carboxykinase 2 (Pck2), and protein tyrosine phosphatase 1B (Ptp1b) were significantly decreased in the high-dose TMXK group, while v-akt murine thymoma viral oncogene homolog 1 (Akt1) and insulin receptor substrate 2 (Irs2) were increased. CONCLUSION Our data show that TMXK Tablet reduces fasting glucose level and improves insulin resistance in diabetic rats. The mechanism may be linked to the inactivation of PTP1B and PCK enzymes, or through intracellular pathways, such as the insulin signaling pathway.
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Shao M, Lu X, Cong W, Xing X, Tan Y, Li Y, Li X, Jin L, Wang X, Dong J, Jin S, Zhang C, Cai L. Multiple low-dose radiation prevents type 2 diabetes-induced renal damage through attenuation of dyslipidemia and insulin resistance and subsequent renal inflammation and oxidative stress. PLoS One 2014; 9:e92574. [PMID: 24651118 PMCID: PMC3961432 DOI: 10.1371/journal.pone.0092574] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Accepted: 02/24/2014] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Dyslipidemia and lipotoxicity-induced insulin resistance, inflammation and oxidative stress are the key pathogeneses of renal damage in type 2 diabetes. Increasing evidence shows that whole-body low dose radiation (LDR) plays a critical role in attenuating insulin resistance, inflammation and oxidative stress. OBJECTIVE The aims of the present study were to investigate whether LDR can prevent type 2 diabetes-induced renal damage and the underlying mechanisms. METHODS Mice were fed with a high-fat diet (HFD, 40% of calories from fat) for 12 weeks to induce obesity followed by a single intraperitoneal injection of streptozotocin (STZ, 50 mg/kg) to develop a type 2 diabetic mouse model. The mice were exposed to LDR at different doses (25, 50 and 75 mGy) for 4 or 8 weeks along with HFD treatment. At each time-point, the kidney weight, renal function, blood glucose level and insulin resistance were examined. The pathological changes, renal lipid profiles, inflammation, oxidative stress and fibrosis were also measured. RESULTS HFD/STZ-induced type 2 diabetic mice exhibited severe pathological changes in the kidney and renal dysfunction. Exposure of the mice to LDR for 4 weeks, especially at 50 and 75 mGy, significantly improved lipid profiles, insulin sensitivity and protein kinase B activation, meanwhile, attenuated inflammation and oxidative stress in the diabetic kidney. The LDR-induced anti-oxidative effect was associated with up-regulation of renal nuclear factor E2-related factor-2 (Nrf-2) expression and function. However, the above beneficial effects were weakened once LDR treatment was extended to 8 weeks. CONCLUSION These results suggest that LDR exposure significantly prevented type 2 diabetes-induced kidney injury characterized by renal dysfunction and pathological changes. The protective mechanisms of LDR are complicated but may be mainly attributed to the attenuation of dyslipidemia and the subsequent lipotoxicity-induced insulin resistance, inflammation and oxidative stress.
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Affiliation(s)
- Minglong Shao
- School of Public Health of Jilin University, Changchun, China; Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical University, Wenzhou, China; Ruian Center of Chinese-American Research Institute for Diabetic Complications, the Third Affiliated Hospital of the Wenzhou Medical University, Wenzhou, China
| | - Xuemian Lu
- Ruian Center of Chinese-American Research Institute for Diabetic Complications, the Third Affiliated Hospital of the Wenzhou Medical University, Wenzhou, China
| | - Weitao Cong
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical University, Wenzhou, China; School of Pharmacy, Wenzhou Medical College, Wenzhou, China
| | - Xiao Xing
- School of Public Health of Jilin University, Changchun, China; Changchun Institute for Food and Drug Control, Changchun, China
| | - Yi Tan
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical University, Wenzhou, China; Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville, Louisville, Kentucky, United States of America
| | - Yunqian Li
- Department of Neurosurgery, the First Hospital of Jilin University, Changchun, China
| | - Xiaokun Li
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical University, Wenzhou, China; School of Pharmacy, Wenzhou Medical College, Wenzhou, China
| | - Litai Jin
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical University, Wenzhou, China; School of Pharmacy, Wenzhou Medical College, Wenzhou, China
| | - Xiaojie Wang
- School of Pharmacy, Wenzhou Medical College, Wenzhou, China
| | - Juancong Dong
- School of Public Health of Jilin University, Changchun, China
| | - Shunzi Jin
- School of Public Health of Jilin University, Changchun, China
| | - Chi Zhang
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical University, Wenzhou, China; Ruian Center of Chinese-American Research Institute for Diabetic Complications, the Third Affiliated Hospital of the Wenzhou Medical University, Wenzhou, China
| | - Lu Cai
- Chinese-American Research Institute for Diabetic Complications, Wenzhou Medical University, Wenzhou, China; Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville, Louisville, Kentucky, United States of America
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Shi L, Zhang Q, Xu B, Jiang X, Dai Y, Zhang CY, Zen K. Sustained high protein-tyrosine phosphatase 1B activity in the sperm of obese males impairs the sperm acrosome reaction. J Biol Chem 2014; 289:8432-41. [PMID: 24519936 DOI: 10.1074/jbc.m113.517466] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Evidence of a causal link between male obesity and subfertility or infertility has been demonstrated previously. However, the mechanism underlying this link is incompletely understood. Here, we report that sustained high protein-tyrosine phosphatase 1B (PTP1B) activity in sperm of obese donors plays an essential role in coupling male obesity and subfertility or infertility. First, PTP1B level and activity were significantly higher in sperm from ob/ob mice than in wild-type littermates. High PTP1B level and activity in sperm was also observed in obese patients compared with non-obese donors. The enhanced sperm PTP1B level and activity in ob/ob mice and obese patients correlated with a defect of the sperm acrosome reaction (AR). Second, treating sperm from male ob/ob mice or obese men with a specific PTP1B inhibitor largely restored the sperm AR. Finally, blockade of sperm AR by enhanced PTP1B activity in male ob/ob mice or obese men was due to prolonged dephosphorylation of N-ethylmaleimide-sensitive factor by PTP1B, leading to the inability to reassemble the trans-SNARE complexes, which is a critical step in sperm acrosomal exocytosis. In summary, our study demonstrates for the first time that a sustained high PTP1B level or activity in the sperm of obese donors causes a defect of sperm AR and that PTP1B is a novel potential therapeutic target for male infertility treatment.
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Affiliation(s)
- Lei Shi
- From the Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China and
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Rajarajeshwari T, Shivashri C, Rajasekar P. Synthesis and characterization of biocompatible gymnemic acid–gold nanoparticles: a study on glucose uptake stimulatory effect in 3T3-L1 adipocytes. RSC Adv 2014. [DOI: 10.1039/c4ra07087a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An enhancedin vitroglucose utilization action of the biosynthesized GA–AuNPs.
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Affiliation(s)
- T. Rajarajeshwari
- Department of Biotechnology
- Rajalakshmi Engineering College
- Chennai-602 105, India
| | - C. Shivashri
- Department of Biotechnology
- Rajalakshmi Engineering College
- Chennai-602 105, India
| | - P. Rajasekar
- Department of Biotechnology
- Rajalakshmi Engineering College
- Chennai-602 105, India
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Ottanà R, Maccari R, Mortier J, Caselli A, Amuso S, Camici G, Rotondo A, Wolber G, Paoli P. Synthesis, biological activity and structure–activity relationships of new benzoic acid-based protein tyrosine phosphatase inhibitors endowed with insulinomimetic effects in mouse C2C12 skeletal muscle cells. Eur J Med Chem 2014; 71:112-27. [DOI: 10.1016/j.ejmech.2013.11.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 10/24/2013] [Accepted: 11/01/2013] [Indexed: 12/29/2022]
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Roberts CK, Hevener AL, Barnard RJ. Metabolic syndrome and insulin resistance: underlying causes and modification by exercise training. Compr Physiol 2013; 3:1-58. [PMID: 23720280 DOI: 10.1002/cphy.c110062] [Citation(s) in RCA: 264] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Metabolic syndrome (MS) is a collection of cardiometabolic risk factors that includes obesity, insulin resistance, hypertension, and dyslipidemia. Although there has been significant debate regarding the criteria and concept of the syndrome, this clustering of risk factors is unequivocally linked to an increased risk of developing type 2 diabetes and cardiovascular disease. Regardless of the true definition, based on current population estimates, nearly 100 million have MS. It is often characterized by insulin resistance, which some have suggested is a major underpinning link between physical inactivity and MS. The purpose of this review is to: (i) provide an overview of the history, causes and clinical aspects of MS, (ii) review the molecular mechanisms of insulin action and the causes of insulin resistance, and (iii) discuss the epidemiological and intervention data on the effects of exercise on MS and insulin sensitivity.
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Affiliation(s)
- Christian K Roberts
- Exercise and Metabolic Disease Research Laboratory, Translational Sciences Section, School of Nursing, University of California at Los Angeles, Los Angeles, California, USA.
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Owen C, Lees EK, Grant L, Zimmer DJ, Mody N, Bence KK, Delibegović M. Inducible liver-specific knockdown of protein tyrosine phosphatase 1B improves glucose and lipid homeostasis in adult mice. Diabetologia 2013; 56:2286-96. [PMID: 23832083 DOI: 10.1007/s00125-013-2992-z] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 06/14/2013] [Indexed: 12/19/2022]
Abstract
AIMS/HYPOTHESIS Protein tyrosine phosphatase 1B (PTP1B) is a key negative regulator of insulin signalling. Hepatic PTP1B deficiency, using the Alb-Cre promoter to drive Ptp1b deletion from birth in mice, improves glucose homeostasis, insulin sensitivity and lipid metabolism. The aim of this study was to investigate the therapeutic potential of decreasing liver PTP1B levels in obese and insulin-resistant adult mice. METHODS Inducible Ptp1b liver-specific knockout mice were generated using SA-Cre-ER(T2) mice crossed with Ptp1b floxed (Ptp1b(fl/fl)) mice. Mice were fed a high-fat diet (HFD) for 12 weeks to induce obesity and insulin resistance. Tamoxifen was administered in the HFD to induce liver-specific deletion of Ptp1b (SA-Ptp1b(-/-) mice). Body weight, glucose homeostasis, lipid homeostasis, serum adipokines, insulin signalling and endoplasmic reticulum (ER) stress were examined. RESULTS Despite no significant change in body weight relative to HFD-fed Ptp1b(fl/fl) control mice, HFD-fed SA-Ptp1b(-/-) mice exhibited a reversal of glucose intolerance as determined by improved glucose and pyruvate tolerance tests, decreased fed and fasting blood glucose and insulin levels, lower HOMA of insulin resistance, circulating leptin, serum and liver triacylglycerols, serum NEFA and decreased HFD-induced ER stress. This was associated with decreased glycogen synthase, eukaryotic translation initiation factor-2α kinase 3, eukaryotic initiation factor 2α and c-Jun NH2-terminal kinase 2 phosphorylation, and decreased expression of Pepck. CONCLUSIONS/INTERPRETATION Inducible liver-specific PTP1B knockdown reverses glucose intolerance and improves lipid homeostasis in HFD-fed obese and insulin-resistant adult mice. This suggests that knockdown of liver PTP1B in individuals who are already obese/insulin resistant may have relatively rapid, beneficial therapeutic effects.
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Affiliation(s)
- C Owen
- Institute of Medical Sciences, School of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
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Rusai K, Herzog R, Kuster L, Kratochwill K, Aufricht C. GSK-3β inhibition protects mesothelial cells during experimental peritoneal dialysis through upregulation of the heat shock response. Cell Stress Chaperones 2013; 18:569-79. [PMID: 23494401 PMCID: PMC3745257 DOI: 10.1007/s12192-013-0410-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 01/29/2013] [Accepted: 01/31/2013] [Indexed: 02/04/2023] Open
Abstract
Non-physiological components of peritoneal dialysis fluids (PDF) lead to the injury of peritoneal mesothelial cells resulting in the failure of peritoneal dialysis (PD) potentially via inadequate induction of the protective heat shock response (HSR). Glycogen synthase kinase-3β (GSK-3β) is a negative regulator of cell survival partly by suppression of the HSR and is influenced by stress stimuli also present in conventional PDF. The effects of PDF on GSK-3β activation and the impact of GSK-3β inhibition with lithium (LiCl) were investigated on cell survival with special regard to HSR, in particular to heat shock transcription factor 1 (HSF-1) activation and Hsp72 production in an in vitro model of PD using MeT-5A and primary mesothelial cells. Incubation of cells with the PDF Dianeal® (glucose-based, low pH, high glucose degradation products (GDP)) and Extraneal® (icodextrin-based, low pH, low GDP) caused activation of GSK-3β compared to the other tested PDF, i.e. Balance®, Physioneal® (normal pH, glucose-based, low GDP) and Nutrineal® (moderately acidic, amino acid-based). Inhibition of GSK-3β with LiCl in Dianeal® and Extraneal®-treated cells dose-dependently decreased cell damage and death rate and was paralleled by higher HSF-1 activation and Hsp72 expression. GSK-3β is activated by low pH GDP containing PDF with and without glucose as osmotic agent, indicating that GSK-3β is involved in mesothelial cell signalling in response to experimental PD. Inhibition of GSK-3β with LiCl ameliorated cell injury and improved HSR upon PDF exposure. Thus, GSK-3β inhibitors likely have therapeutic potential as cytoprotective additive for decreasing PDF toxicity.
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Affiliation(s)
- K. Rusai
- />Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - R. Herzog
- />Zytoprotec GmbH, 1010 Vienna, Austria
| | - L. Kuster
- />Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - K. Kratochwill
- />Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- />Zytoprotec GmbH, 1010 Vienna, Austria
| | - C. Aufricht
- />Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
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