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Mir-338-3P Functions As a Tumor Suppressor in Gastric Cancer by Targeting PTP1B
Sun et al. Cell Death and Disease DOI 10.1038/s41419-018-0611-0 Cell Death & Disease ARTICLE Open Access miR-338-3p functions as a tumor suppressor in gastric cancer by targeting PTP1B Feng Sun1, Mengchao Yu2,JingYu2, Zhijian Liu1,XinyanZhou2,YanqingLiu2, Xiaolong Ge3,HaidongGao2, Mei Li4, Xiaohong Jiang2,SongLiu1,XiChen2 and Wenxian Guan 1 Abstract Gastric cancer (GC) is one of the most common malignant tumors and peritoneal metastasis is the primary cause for advanced GC’s mortality. Protein-tyrosine phosphatase 1B (PTP1B) functions as an oncogene and involves in carcinogenesis and cancer dissemination. However, the function and regulation of PTP1B in GC remain poorly understood. In this study, we found that PTP1B was upregulated in GC tissues and overexpression of PTP1B in vitro promoted cell migration and prevented apoptosis. Then, we predicted that PTP1B was a target of miR-338-3p and we revealed an inverse correlation between miR-338-3p levels and PTP1B protein levels in GC tissues. Next, we verified that PTP1B was inhibited by miR-338-3p via direct targeting to its 3′-untranslated regions. Moreover, overexpression of miR-338-3p in vitro attenuated GC cell migration and promoted apoptosis, and these effects could be partially reversed by reintroduction of PTP1B. Finally, we established an orthotopic xenograft model and a peritoneal dissemination model of GC to demonstrate that miR-338-3p restrained tumor growth and dissemination in vivo by targeting PTP1B. Taken together, our results highlight that PTP1B is an oncogene and is negatively regulated by miR- 1234567890():,; 1234567890():,; 338-3p in GC, which may provide new insights into novel molecular therapeutic targets for GC. -
The Antidiabetic Drug Lobeglitazone Has the Potential to Inhibit PTP1B T Activity ⁎ Ruth F
Bioorganic Chemistry 100 (2020) 103927 Contents lists available at ScienceDirect Bioorganic Chemistry journal homepage: www.elsevier.com/locate/bioorg The antidiabetic drug lobeglitazone has the potential to inhibit PTP1B T activity ⁎ Ruth F. Rochaa, Tiago Rodriguesc, Angela C.O. Menegattia,b, , Gonçalo J.L. Bernardesc,d, Hernán Terenzia a Centro de Biologia Molecular Estrutural, Departamento de Bioquímica, Universidade Federal de Santa Catarina, Campus Trindade, 88040-900 Florianópolis, SC, Brazil b Universidade Federal do Piauí, CPCE, 64900-000 Bom Jesus, PI, Brazil c Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisbon, Portugal d Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK ARTICLE INFO ABSTRACT Keywords: Protein tyrosine phosphatase 1B (PTP1B) is considered a potential therapeutic target for the treatment of type 2 Thiazolidinediones diabetes mellitus (T2DM), since this enzyme plays a significant role to down-regulate insulin and leptin sig- Lobeglitazone nalling and its over expression has been implicated in the development of insulin resistance, T2DM and obesity. PPAR-γ Some thiazolidinediones (TZD) derivatives have been reported as promising PTP1B inhibitors with anti hy- PTP1B perglycemic effects. Recently, lobeglitazone, a new TZD, was described as an antidiabetic drug that targetsthe Non-competitive inhibitors PPAR-γ (peroxisome γ proliferator-activated receptor) pathway, but no information on its effects on PTP1B have been reported to date. We investigated the effects of lobeglitazone on PTP1B activity in vitro. Surprisingly, lobeglitazone led to moderate inhibition on PTP1B (IC50 42.8 ± 3.8 µM) activity and to a non-competitive reversible mechanism of action. -
Trace Amine-Associated Receptor 1 Activation Regulates Glucose-Dependent
Trace amine-associated receptor 1 activation regulates glucose-dependent insulin secretion in pancreatic beta cells in vitro by ©Arun Kumar A thesis submitted to the School of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science Department of Biochemistry, Faculty of Science Memorial University of Newfoundland FEBRUARY 2021 St. John’s, Newfoundland and Labrador i Abstract Trace amines are a group of endogenous monoamines which exert their action through a family of G protein-coupled receptors known as trace amine-associated receptors (TAARs). TAAR1 has been reported to regulate insulin secretion from pancreatic beta cells in vitro and in vivo. This study investigates the mechanism(s) by which TAAR1 regulates insulin secretion. The insulin secreting rat INS-1E -cell line was used for the study. Cells were pre-starved (30 minutes) and then incubated with varying concentrations of glucose (2.5 – 20 mM) or KCl (3.6 – 60 mM) for 2 hours in the absence or presence of various concentrations of the selective TAAR1 agonist RO5256390. Secreted insulin per well was quantified using ELISA and normalized to the total protein content of individual cultures. RO5256390 significantly (P < 0.0001) increased glucose- stimulated insulin secretion in a dose-dependent manner, with no effect on KCl-stimulated insulin secretion. Affymetrix-microarray data analysis identified genes (Gnas, Gng7, Gngt1, Gria2, Cacna1e, Kcnj8, and Kcnj11) whose expression was associated with changes in TAAR1 in response to changes in insulin secretion in pancreatic beta cell function. The identified potential links to TAAR1 supports the regulation of glucose-stimulated insulin secretion through KATP ion channels. -
Edinburgh Research Explorer
Edinburgh Research Explorer International Union of Basic and Clinical Pharmacology. LXXXVIII. G protein-coupled receptor list Citation for published version: Davenport, AP, Alexander, SPH, Sharman, JL, Pawson, AJ, Benson, HE, Monaghan, AE, Liew, WC, Mpamhanga, CP, Bonner, TI, Neubig, RR, Pin, JP, Spedding, M & Harmar, AJ 2013, 'International Union of Basic and Clinical Pharmacology. LXXXVIII. G protein-coupled receptor list: recommendations for new pairings with cognate ligands', Pharmacological reviews, vol. 65, no. 3, pp. 967-86. https://doi.org/10.1124/pr.112.007179 Digital Object Identifier (DOI): 10.1124/pr.112.007179 Link: Link to publication record in Edinburgh Research Explorer Document Version: Publisher's PDF, also known as Version of record Published In: Pharmacological reviews Publisher Rights Statement: U.S. Government work not protected by U.S. copyright General rights Copyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policy The University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorer content complies with UK legislation. If you believe that the public display of this file breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 02. Oct. 2021 1521-0081/65/3/967–986$25.00 http://dx.doi.org/10.1124/pr.112.007179 PHARMACOLOGICAL REVIEWS Pharmacol Rev 65:967–986, July 2013 U.S. -
Dualism of Peroxisome Proliferator-Activated Receptor Α/Γ: a Potent Clincher in Insulin Resistance
AEGAEUM JOURNAL ISSN NO: 0776-3808 Dualism of Peroxisome Proliferator-Activated Receptor α/γ: A Potent Clincher in Insulin Resistance Mr. Ravikumar R. Thakar1 and Dr. Nilesh J. Patel1* 1Faculty of Pharmacy, Shree S. K. Patel College of Pharmaceutical Education & Research, Ganpat University, Gujarat, India. [email protected] Abstract: Diabetes mellitus is clinical syndrome which is signalised by augmenting level of sugar in blood stream, which produced through lacking of insulin level and defective insulin activity or both. As per worldwide epidemiology data suggested that the numbers of people with T2DM living in developing countries is increasing with 80% of people with T2DM. Peroxisome proliferator-activated receptors are a family of ligand-activated transcription factors; modulate the expression of many genes. PPARs have three isoforms namely PPARα, PPARβ/δ and PPARγ that play a central role in regulating glucose, lipid and cholesterol metabolism where imbalance can lead to obesity, T2DM and CV ailments. It have pathogenic role in diabetes. PPARα is regulates the metabolism of lipids, carbohydrates, and amino acids, activated by ligands such as polyunsaturated fatty acids, and drugs used as Lipid lowering agents. PPAR β/δ could envision as a therapeutic option for the correction of diabetes and a variety of inflammatory conditions. PPARγ is well categorized, an element of the PPARs, also pharmacological effective as an insulin resistance lowering agents, are used as a remedy for insulin resistance integrated with type- 2 diabetes mellitus. There are mechanistic role of PPARα, PPARβ/δ and PPARγ in diabetes mellitus and insulin resistance. From mechanistic way, it revealed that dual PPAR-α/γ agonist play important role in regulating both lipids as well as glycemic levels with essential safety issues. -
Combination Treatment with Pioglitazone and Fenofibrate
179 Combination treatment with pioglitazone and fenofibrate attenuates pioglitazone-mediated acceleration of bone loss in ovariectomized rats Rana Samadfam, Malaika Awori, Agnes Be´nardeau1, Frieder Bauss2, Elena Sebokova1, Matthew Wright1 and Susan Y Smith Charles River Laboratories, 22022 Transcanadienne, Senneville, Montre´al, Que´bec, Canada H9X 3R3 1F. Hoffmann-La Roche AG, Basel, CH-4070 Switzerland 2Roche Diagnostics GmbH, Penzberg, DE-82377 Germany (Correspondence should be addressed to S Y Smith; Email: [email protected]) Abstract Peroxisome proliferator-activated receptor (PPAR) g ago- mineral content (w45%) and bone mineral density (BMD; nists, such as pioglitazone (Pio), improve glycemia and lipid w60%) at the lumbar spine. Similar effects of treatments were profile but are associated with bone loss and fracture risk. Data observed at the femur, most notably at sites rich in trabecular regarding bone effects of PPARa agonists (including bone. At the proximal tibial metaphysis, concomitant fenofibrate (Feno)) are limited, although animal studies treatment with PioCFeno prevented Pio exacerbation of suggest that Feno may increase bone mass. This study ovariectomy-induced loss of trabecular bone, resulting in investigated the effects of a 13-week oral combination BMD values in the PioCFeno group comparable to OVX treatment with Pio (10 mg/kg per day)CFeno (25 mg/kg controls. Discontinuation of Pio or Feno treatment of per day) on body composition and bone mass parameters OVX rats was associated with partial reversal of effects on compared with Pio or Feno alone in adult ovariectomized bone loss or bone mass gain, respectively, while values in the (OVX) rats, with a 4-week bone depletion period, followed PioCFeno group remained comparable to OVX controls. -
Comparative Transcriptional Network Modeling of Three PPAR-A/C Co-Agonists Reveals Distinct Metabolic Gene Signatures in Primary Human Hepatocytes
Comparative Transcriptional Network Modeling of Three PPAR-a/c Co-Agonists Reveals Distinct Metabolic Gene Signatures in Primary Human Hepatocytes Rene´e Deehan1, Pia Maerz-Weiss2, Natalie L. Catlett1, Guido Steiner2, Ben Wong1, Matthew B. Wright2*, Gil Blander1¤a, Keith O. Elliston1¤b, William Ladd1, Maria Bobadilla2, Jacques Mizrahi2, Carolina Haefliger2, Alan Edgar{2 1 Selventa, Cambridge, Massachusetts, United States of America, 2 F. Hoffmann-La Roche AG, Basel, Switzerland Abstract Aims: To compare the molecular and biologic signatures of a balanced dual peroxisome proliferator-activated receptor (PPAR)-a/c agonist, aleglitazar, with tesaglitazar (a dual PPAR-a/c agonist) or a combination of pioglitazone (Pio; PPAR-c agonist) and fenofibrate (Feno; PPAR-a agonist) in human hepatocytes. Methods and Results: Gene expression microarray profiles were obtained from primary human hepatocytes treated with EC50-aligned low, medium and high concentrations of the three treatments. A systems biology approach, Causal Network Modeling, was used to model the data to infer upstream molecular mechanisms that may explain the observed changes in gene expression. Aleglitazar, tesaglitazar and Pio/Feno each induced unique transcriptional signatures, despite comparable core PPAR signaling. Although all treatments inferred qualitatively similar PPAR-a signaling, aleglitazar was inferred to have greater effects on high- and low-density lipoprotein cholesterol levels than tesaglitazar and Pio/Feno, due to a greater number of gene expression changes in pathways related to high-density and low-density lipoprotein metabolism. Distinct transcriptional and biologic signatures were also inferred for stress responses, which appeared to be less affected by aleglitazar than the comparators. In particular, Pio/Feno was inferred to increase NFE2L2 activity, a key component of the stress response pathway, while aleglitazar had no significant effect. -
Corporate Presentation June 2019 Disclaimer
Corporate Presentation June 2019 Disclaimer Some of the statements contained in this presentation constitute forward-looking statements. Statements that are not historical facts are forward-looking statements. Forward-looking statements generally can be identified by the use of forward-looking terminology such as “may”, “will”, “expect”, “intend”, “estimate”, “anticipate”, “believe”, “continue” or similar terminology. These statements are based on the Company’s current strategy, plans, objectives, assumptions, estimates and projections. Investors should therefore not place undue reliance on those statements. The Company makes no representation, warranty or prediction that the results anticipated by such forward- looking statements will be achieved, and such forward-looking statements represent, in each case, only one of many possible scenarios and should not be viewed as the most likely or standard scenario. Forward-looking statements speak only as of the date that they are made and the Company does not undertake to update any forward-looking statements in light of new information or future events. Forward-looking statements involve inherent risks and uncertainties. The Company cautions that a number of important factors could cause actual results to differ materially from those contained in any forward-looking statement. 2 Well Diversified Mid-to-Late Stage Metabolic Pipeline for Large Market Opportunities Global partnerships secured for late stage clinical program in type 2 diabetes • Imeglimin: First in class oral drug candidate targeting -
Mechanism of Satellite Cell Regulation by Myokines
J Phys Fitness Sports Med, 6 (5): 311-316 (2017) DOI: 10.7600/jpfsm.6.311 JPFSM: Review Article Mechanism of satellite cell regulation by myokines Yasuro Furuichi* and Nobuharu L. Fujii Department of Health Promotion Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 193-0397, Japan Received: July 19, 2017 / Accepted: August 7, 2017 Abstract Skeletal muscle stem cells, known as satellite cells, participate in postnatal skeletal muscle growth, regeneration, and hypertrophy. They are quiescent in the resting state, but are activated after muscle injury, and subsequently replicate and fuse into existing myofibers. The behavior of satellite cells during muscle regeneration is regulated by extrinsic factors, such as the extracellular matrix, mechanical stimuli, and soluble factors. Myokines, muscle-derived secretory factors, are important regulators of satellite cell activation, proliferation, and differen- tiation. It is well known that muscle injury induces the release of various growth factors from myofibers, and these growth factors affect satellite cells. It has recently been shown that myo- kines secreted from myofibers without cell damage also regulate satellite cell functions. Here, we summarize myokines with known roles in the regulation of satellite cells and the mecha- nism underlying this regulatory process. Keywords : secretion, myogenesis, muscle regeneration regulation, but there are also molecules related to muscle Introduction regeneration or plasticity. In this review, we introduce the Skeletal muscle is a unique tissue that has a remarkable reported myokines involved in the regulation of satellite ability to regenerate after injury. In response to tissue cell behavior and its molecular mechanism. -
Negotiating Gender and Spirituality in Literary Representations of Rastafari
Negotiating Gender and Spirituality in Literary Representations of Rastafari Annika McPherson Abstract: While the male focus of early literary representations of Rastafari tends to emphasize the movement’s emergence, goals or specific religious practices, more recent depictions of Rasta women in narrative fiction raise important questions not only regarding the discussion of gender relations in Rastafari, but also regarding the functions of literary representations of the movement. This article outlines a dialogical ‘reasoning’ between the different negotiations of gender in novels with Rastafarian protagonists and suggests that the characters’ individual spiritual journeys are key to understanding these negotiations within the gender framework of Rastafarian decolonial practices. Male-centred Literary Representations of Rastafari Since the 1970s, especially, ‘roots’ reggae and ‘dub’ or performance poetry have frequently been discussed as to their relations to the Rastafari movement – not only based on their lyrical content, but often by reference to the artists or poets themselves. Compared to these genres, the representation of Rastafari in narrative fiction has received less attention to date. Furthermore, such references often appear to serve rather descriptive functions, e.g. as to the movement’s philosophy or linguistic practices. The early depiction of Rastafari in Roger Mais’s “morality play” Brother Man (1954), for example, has been noted for its favourable representation of the movement in comparison to the press coverage of -
Scientific Evidence of Diets for Weight Loss
Nutrition 69 (2020) 110549 Contents lists available at ScienceDirect Nutrition journal homepage: www.nutritionjrnl.com Scientific evidence of diets for weight loss: Different macronutrient composition, intermittent fasting, and popular diets Rachel Freire Ph.D. * Mucosal Immunology and Biology Research Center and Center for Celiac Research and Treatment, Department of Pediatrics, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts, USA ARTICLE INFO ABSTRACT Article History: New dietary strategies have been created to treat overweight and obesity and have become popular and widely adopted. Nonetheless, they are mainly based on personal impressions and reports published in books and magazines, rather than on scientific evidence. Animal models and human clinical trials have been Keywords: employed to study changes in body composition and metabolic outcomes to determine the most effective Obesity diet. However, the studies present many limitations and should be carefully analyzed. The aim of this review Weight-loss was to discuss the scientific evidence of three categories of diets for weight loss. There is no one most effec- Popular diets tive diet to promote weight loss. In the short term, high-protein, low-carbohydrate diets and intermittent Fasting Macronutrient fasting are suggested to promote greater weight loss and could be adopted as a jumpstart. However, owing to adverse effects, caution is required. In the long term, current evidence indicates that different diets pro- moted similar weight loss and adherence to diets will predict their success. Finally, it is fundamental to adopt a diet that creates a negative energy balance and focuses on good food quality to promote health. © 2019 Elsevier Inc. -
Metabolite Sensing Gpcrs: Promising Therapeutic Targets for Cancer Treatment?
cells Review Metabolite Sensing GPCRs: Promising Therapeutic Targets for Cancer Treatment? Jesús Cosín-Roger 1,*, Dolores Ortiz-Masia 2 , Maria Dolores Barrachina 3 and Sara Calatayud 3 1 Hospital Dr. Peset, Fundación para la Investigación Sanitaria y Biomédica de la Comunitat Valenciana, FISABIO, 46017 Valencia, Spain 2 Departament of Medicine, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain; [email protected] 3 Departament of Pharmacology and CIBER, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain; [email protected] (M.D.B.); [email protected] (S.C.) * Correspondence: [email protected]; Tel.: +34-963851234 Received: 30 September 2020; Accepted: 21 October 2020; Published: 23 October 2020 Abstract: G-protein-coupled receptors constitute the most diverse and largest receptor family in the human genome, with approximately 800 different members identified. Given the well-known metabolic alterations in cancer development, we will focus specifically in the 19 G-protein-coupled receptors (GPCRs), which can be selectively activated by metabolites. These metabolite sensing GPCRs control crucial processes, such as cell proliferation, differentiation, migration, and survival after their activation. In the present review, we will describe the main functions of these metabolite sensing GPCRs and shed light on the benefits of their potential use as possible pharmacological targets for cancer treatment. Keywords: G-protein-coupled receptor; metabolite sensing GPCR; cancer 1. Introduction G-protein-coupled receptors (GPCRs) are characterized by a seven-transmembrane configuration, constitute the largest and most ubiquitous family of plasma membrane receptors, and regulate virtually all known physiological processes in humans [1,2]. This family includes almost one thousand genes that were initially classified on the basis of sequence homology into six classes (A–F), where classes D and E were not found in vertebrates [3].