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Lautt WW. Hepatalin: the missing link in prediabetes, obesity, and type 2 diabetes. Can J Physiol Pharmacol 2023; 101:117-135. [PMID: 36716439 DOI: 10.1139/cjpp-2022-0332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Hepatalin is a hormone secreted by the liver in response to pulses of insulin after a mixed nutrient meal, but only if the liver receives two permissive synergistic feeding signals from the stomach. Hepatalin stimulates glucose uptake and storage as glycogen in skeletal muscle, heart, and kidney but not liver, intestines, or adipocytes. Insulin acts primarily on liver and fat. Reduced hepatalin action results in postprandial hyperglycemia, compensatory elevation of insulin secretion, and a resultant shift in partitioning of nutrient energy storage from glycogen in muscle, to fat. Chronic hepatalin suppression leads to a predictable chronology of dysfunctions, first diagnosable as Absence of Meal-induced Insulin Sensitization (AMIS) which progresses to prediabetes, adiposity, and type 2 diabetes. The focus on nutrient partitioning and the role of hepatalin allows AMIS to be diagnosed, prevented, and treated, including through the use of lifestyle interventions.
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Affiliation(s)
- W Wayne Lautt
- Department of Pharmacology and Therapeutics, Max Rady Faculty of Health Sciences, University of Manitoba, 260 Brodie Center 727 McDermot Avenue, Winnipeg, MB R3E 3P5, Canada
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Chung YL, Hou YC, Wang IK, Lu KC, Yen TH. Organophosphate pesticides and new-onset diabetes mellitus: From molecular mechanisms to a possible therapeutic perspective. World J Diabetes 2021; 12:1818-1831. [PMID: 34888010 PMCID: PMC8613664 DOI: 10.4239/wjd.v12.i11.1818] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 05/27/2021] [Accepted: 09/23/2021] [Indexed: 02/06/2023] Open
Abstract
Organophosphate is a commonly used pesticide in the agricultural sector. The main action of organophosphate focuses on acetylcholinesterase inhibition, and it therefore contributes to acute cholinergic crisis, intermediate syndrome and delayed neurotoxicity. From sporadic case series to epidemiologic studies, organophosphate has been linked to hyperglycemia and the occurrence of new-onset diabetes mellitus. Organophosphate-mediated direct damage to pancreatic beta cells, insulin resistance related to systemic inflammation and excessive hepatic gluconeogenesis and polymorphisms of the enzyme governing organophosphate elimination are all possible contributors to the development of new-onset diabetes mellitus. To date, a preventive strategy for organophosphate-mediated new-onset diabetes mellitus is still lacking. However, lowering reactive oxygen species levels may be a practical method to reduce the risk of developing hyperglycemia.
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Affiliation(s)
- Ya-Ling Chung
- Department of Medical Laboratory, Cardinal-Tien Hospital, New Taipei City 231, Taiwan
| | - Yi-Chou Hou
- Department of Internal Medicine, Cardinal Tien Hospital, New Taipei City 231, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan
| | - I-Kuan Wang
- Department of Nephrology, China Medical University Hospital, Taichung 404, Taiwan
- College of Medicine, China Medical University, Taichung 404, Taiwan
| | - Kuo-Cheng Lu
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan
- Division of Nephrology, Department of Medicine, Fu Jen Catholic University Hospital, New Taipei City 242, Taiwan
- Division of Nephrology, Department of Medicine, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 231, Taiwan
| | - Tzung-Hai Yen
- Department of Nephrology, Chang Gung Memorial Hospital, Linkou 333, Taiwan
- School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
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Mohanty S, Rashid MHA, Mohanty C, Swayamsiddha S. Modern computational intelligence based drug repurposing for diabetes epidemic. Diabetes Metab Syndr 2021; 15:102180. [PMID: 34186343 DOI: 10.1016/j.dsx.2021.06.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 06/12/2021] [Accepted: 06/14/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIM Objectives are to explore recent advances in discovery of new antidiabetic agents using repurposing strategies and to discuss modern technologies used for drug repurposing highlighting diabetic specific web portal. METHODS Recent literature were studied and analyzed from various sources such as Scopus, PubMed, and IEEE Xplore databases. RESULTS Drugs like Niclosamideethanolamine, Methazolamide, Diacerein, Berberine, Clobetasol, etc. with possibility of repurposing to curb diabetes can be potential late-stage clinical candidates, providing access to information on pharmacology, formulation, and probable toxicity if any. CONCLUSIONS With collaboration of artificial intelligence (AI) with pharmacology, the efficiency of drug repurposing can improve significantly.
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Affiliation(s)
- Sweta Mohanty
- School of Applied Science, KIIT University, Bhubaneswar, Odisha, India
| | | | - Chandana Mohanty
- School of Applied Science, KIIT University, Bhubaneswar, Odisha, India.
| | - Swati Swayamsiddha
- School of Electronics Engineering, KIIT University, Bhubaneswar, Odisha, India.
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Lovat NEJ, Legare DJ, Gieni RS, Lautt WW. Gestational postprandial insulin sensitivity in the Sprague Dawley rat: the putative role of hepatic insulin sensitizing substance in glucose partitioning in pregnancy. Can J Physiol Pharmacol 2020; 98:541-547. [PMID: 32453968 DOI: 10.1139/cjpp-2019-0575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pregnancy requires adaptation of maternal insulin sensitivity. In the fed state, a pulse of insulin stimulates glucose uptake and nutrient energy storage via insulin-dependent as well as hepatic insulin sensitizing substance (HISS)-dependent action. HISS is released by the liver in the fed state in the presence of signals integrated through the liver and a pulse of insulin. HISS promotes glucose storage as glycogen in heart, kidney, and skeletal muscle but not in gut, liver, or adipose tissue. HISS is also responsible for the vasodilatory action previously attributed to insulin. The rapid insulin sensitivity test (RIST), a dynamic euglycemic clamp, can quantitate both HISS-dependent and insulin-dependent glucose uptake. The RIST was used to characterize postprandial insulin sensitivity in the Sprague Dawley rat and the changes in the partitioning of nutrient energy throughout gestation. Early pregnancy demonstrated increased insulin sensitivity attributable to HISS-dependent glucose uptake with unchanged insulin-dependent glucose uptake, preserved plasma insulin concentration, and reduced plasma triglyceride concentration compared to the virgin. In late pregnancy, there was reduced HISS-dependent and insulin-dependent glucose uptake accompanied by increased plasma insulin and triglyceride concentration compared to the virgin. These results suggest an important role for HISS in glucose partitioning in pregnancy.
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Affiliation(s)
- Nicole E J Lovat
- University of Manitoba College of Medicine, Max Rady Faculty of Health Sciences, 119 Main Street South, Winnipeg, MB R3E 3P5, Canada.,Providence Medical Group, P.O. Box 421, Liberty Lake, WA 99019-0421, USA
| | - Dallas J Legare
- SciMar Ltd., 119 Main Street South, Dauphin, MB R7N 1K4, Canada
| | - Randall S Gieni
- SciMar Ltd., 119 Main Street South, Dauphin, MB R7N 1K4, Canada
| | - W Wayne Lautt
- University of Manitoba College of Medicine, Max Rady Faculty of Health Sciences, 119 Main Street South, Winnipeg, MB R3E 3P5, Canada.,SciMar Ltd., 119 Main Street South, Dauphin, MB R7N 1K4, Canada
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Zhang M, Luo H, Xi Z, Rogaeva E. Drug repositioning for diabetes based on 'omics' data mining. PLoS One 2015; 10:e0126082. [PMID: 25946000 PMCID: PMC4422696 DOI: 10.1371/journal.pone.0126082] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 03/29/2015] [Indexed: 01/08/2023] Open
Abstract
Drug repositioning has shorter developmental time, lower cost and less safety risk than traditional drug development process. The current study aims to repurpose marketed drugs and clinical candidates for new indications in diabetes treatment by mining clinical ‘omics’ data. We analyzed data from genome wide association studies (GWAS), proteomics and metabolomics studies and revealed a total of 992 proteins as potential anti-diabetic targets in human. Information on the drugs that target these 992 proteins was retrieved from the Therapeutic Target Database (TTD) and 108 of these proteins are drug targets with drug projects information. Research and preclinical drug targets were excluded and 35 of the 108 proteins were selected as druggable proteins. Among them, five proteins were known targets for treating diabetes. Based on the pathogenesis knowledge gathered from the OMIM and PubMed databases, 12 protein targets of 58 drugs were found to have a new indication for treating diabetes. CMap (connectivity map) was used to compare the gene expression patterns of cells treated by these 58 drugs and that of cells treated by known anti-diabetic drugs or diabetes risk causing compounds. As a result, 9 drugs were found to have the potential to treat diabetes. Among the 9 drugs, 4 drugs (diflunisal, nabumetone, niflumic acid and valdecoxib) targeting COX2 (prostaglandin G/H synthase 2) were repurposed for treating type 1 diabetes, and 2 drugs (phenoxybenzamine and idazoxan) targeting ADRA2A (Alpha-2A adrenergic receptor) had a new indication for treating type 2 diabetes. These findings indicated that ‘omics’ data mining based drug repositioning is a potentially powerful tool to discover novel anti-diabetic indications from marketed drugs and clinical candidates. Furthermore, the results of our study could be related to other disorders, such as Alzheimer’s disease.
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Affiliation(s)
- Ming Zhang
- Department of Medicine, Division of Neurology, Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, 60 Leonard Street, Toronto, Ontario, M5T 2S8, Canada
- * E-mail:
| | - Heng Luo
- University of Arkansas at Little Rock/University of Arkansas for Medical Sciences Bioinformatics Graduate Program, 2801 S. University Ave., Little Rock, AR, 72204, United States of America
| | - Zhengrui Xi
- Department of Medicine, Division of Neurology, Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, 60 Leonard Street, Toronto, Ontario, M5T 2S8, Canada
| | - Ekaterina Rogaeva
- Department of Medicine, Division of Neurology, Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, 60 Leonard Street, Toronto, Ontario, M5T 2S8, Canada
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Chowdhury KK, Legare DJ, Lautt WW. Lifestyle impact on meal-induced insulin sensitization in health and prediabetes: A focus on diet, antioxidants, and exercise interventions. Can J Physiol Pharmacol 2013; 91:91-100. [DOI: 10.1139/cjpp-2012-0228] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The augmented whole-body glucose uptake response to insulin during the postprandial state is described as meal-induced insulin sensitization (MIS). MIS occurs when the presence of food in the upper gastrointestinal tract activates 2 feeding signals (activation of hepatic parasympathetic nerves and elevation of hepatic glutathione level), and causes insulin to release hepatic insulin sensitizing substance (HISS), which stimulates glucose uptake in skeletal muscle, heart, and kidneys. HISS action results in nutrient storage, primarily as glycogen. Impairment of HISS release results in the absence of meal-induced insulin sensitization (AMIS), which causes postprandial hyperglycemia and hyperinsulinemia, and chronically leads to the progression to a cluster of metabolic, vascular, and cardiac dysfunctions, which we refer to as components of the AMIS syndrome. Manipulation of the MIS process in health and in disease, by pharmacological and nonpharmacological interventions, is outlined in this review. High fat or sugar supplemented diet reduces MIS; exercise elevates MIS; and antioxidants protect MIS against reductions associated with diet and age.
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Affiliation(s)
- Kawshik K. Chowdhury
- Department of Pharmacology and Therapeutics, Faculty of Medicine, University of Manitoba, A210 – 753 McDermot Avenue, Winnipeg, MB R3E 0T6, Canada
| | - Dallas J. Legare
- Department of Pharmacology and Therapeutics, Faculty of Medicine, University of Manitoba, A210 – 753 McDermot Avenue, Winnipeg, MB R3E 0T6, Canada
| | - W. Wayne Lautt
- Department of Pharmacology and Therapeutics, Faculty of Medicine, University of Manitoba, A210 – 753 McDermot Avenue, Winnipeg, MB R3E 0T6, Canada
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Exercise enhancement of hepatic insulin-sensitising substance-mediated glucose uptake in diet-induced prediabetic rats. Br J Nutr 2012; 109:844-52. [DOI: 10.1017/s0007114512002267] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The sensitisation of insulin action in response to a meal (i.e. meal-induced insulin sensitisation, MIS) represents one of the major means of increased glucose disposal in peripheral tissues during the postprandial state. MIS occurs when the release of hepatic insulin-sensitising substance (HISS) stimulates skeletal muscle glucose uptake. Our previous study had demonstrated that the HISS pathway is impaired in age-associated insulin resistance, and in the rats which were part of that study, voluntary exercise improved the response to insulin by restoring HISS action. The present study tests the hypothesis that voluntary exercise would reverse insulin resistance in diet-induced models of insulin resistance, and that the benefits are attributed through the improvement in HISS action. In this study, two experimental diets, a high-fat diet (for 4 weeks) and 35 % sucrose solution (for 9 and 16 weeks), were used to induce insulin resistance in rats. These rats were assigned to the exercise/no-exercise intervention. The effect of 7 d voluntary running-wheel exercise was determined by measuring insulin- and HISS action in the exercised rats and comparing them with the non-exercised controls. Voluntary exercise reversed insulin resistance, caused by dietary manipulation, through restoration of the HISS action. The direct insulin action was not changed by either diet or exercise. The metabolic improvements and reduced adiposity correlated with the extent of reversal of HISS action induced by exercise. Exercise improves insulin sensitivity in diet-induced insulin resistance primarily by restoration of HISS-mediated glucose uptake.
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Fernandes AB, Guarino MP, Macedo MP. Understanding the in-vivo relevance of S-nitrosothiols in insulin action. Can J Physiol Pharmacol 2012; 90:887-94. [PMID: 22694074 DOI: 10.1139/y2012-090] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Insulin sensitivity is maximal in the postprandial state, decreasing with a fasting period through a mechanism that is dependent on the integrity of the hepatic parasympathetic nerves/nitric oxide (NO) production and increased hepatic glutathione (GSH) levels. GSH and NO react to form S-nitrosoglutathione (GSNO), an S-nitrosothiol (RSNO) for which the in-vivo effects are still being determined. The goal of this study was to test the hypothesis that in-vivo administration of RSNOs, GSNO, or S-nitroso-N-acetylpenicillamine (SNAP) increases insulin sensitivity in fasted or fed-denervated animals, but not in fed animals, where full postprandial insulin sensitivity is achieved. Fasted, fed, or fed-denervated male Wistar rats were used as models for different insulin sensitivity conditions. The rapid insulin sensitivity test (RIST) was used to measure insulin-stimulated glucose disposal before and after drug administration (GSNO, SNAP, or 3-morpholinosydnonimine (SIN-1), intravenous (i.v.) or to the portal vein (i.p.v.)). Fast insulin sensitivity was not altered by administration of SIN-1 (neither i.v. nor i.p.v.). Intravenous infusion of RSNOs in fasted and fed hepatic denervated rats increased insulin sensitivity by 126.35% ± 35.43% and 82.7% ± 12.8%, respectively. In fed animals, RSNOs decreased insulin sensitivity indicating a negative feedback mechanism. These results suggest that RSNOs incremental effect on insulin sensitivity represent a promising therapeutical tool in insulin resistance states.
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Affiliation(s)
- Ana B Fernandes
- CEDOC, Universidade Nova de Lisboa, Campo Mártires da Pátria, Portugal
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Delbro DS, Hallsberg L, Wallin M, Gustafsson BI, Friman S. Expression of the non-neuronal cholinergic system in rat liver. APMIS 2011; 119:227-8. [PMID: 21284743 DOI: 10.1111/j.1600-0463.2011.02719.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hasnain M, Vieweg WVR. Lower parasympathetic drive, insulin resistance, and depression. Am J Med 2010; 123:e7; author reply e9. [PMID: 20934675 DOI: 10.1016/j.amjmed.2010.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 05/13/2010] [Accepted: 05/15/2010] [Indexed: 10/19/2022]
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