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Di Sarli Gutiérrez L, Castro MC, Farromeque Vásquez S, Villagarcía HG, González Arbeláez L, Rojano B, Schinella G, Maiztegui B, Francini F. Protective Effect of Monoterpene Isoespintanol in a Rat Model of Prediabetes Induced by Fructose. Pharmaceuticals (Basel) 2023; 17:47. [PMID: 38256882 PMCID: PMC10819293 DOI: 10.3390/ph17010047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 01/24/2024] Open
Abstract
A high-fructose diet (HFD) induces murine alterations like those recorded in human prediabetes. Protective effects of isoespintanol (monoterpene isolated from Oxandra cf. xylopioides) on changes induced by HFD were evaluated. Animals were maintained for 21 days with a standard diet (C), 10% fructose (F), and F plus isoespintanol (FI, 10 mg/kg, i.p.). Glycemia, triglyceridemia, total and HDL-cholesterol, and insulin resistance index (IRX) were determined. Intraperitoneal glucose tolerance test (IGTT) was performed. In the liver, we measured glycogen, lipogenic gene expression (SREBP-1c, GPAT, FAS, and CPT1), oxidative stress (GSH and 3'-nitrotyrosine content), inflammation markers (iNOS, TNF-α, and PAI-1 gene expression; iNOS and COX-2 protein levels), p-eNOS, p-Akt, and p-GSK3β protein levels. Isoespintanol corrected enhanced triglycerides, lipogenic genes, and IRX, and reduced HDL-cholesterol induced by HFD. Increased liver glycogen and inflammatory markers and decreased GSH, p-Akt, and p-GSK3β measured in F rats were reversed by isoespintanol, and p-eNOS/e-NOS and iNOS/GADPH ratios were normalized. Isoespintanol restored glucose tolerance (IGTT) compared to F rats. These results demonstrate for the first time that isoespintanol prevents endocrine-metabolic alterations induced by HFD in prediabetic rats. These effects could be mediated by Akt/eNOS and Akt/GSK3β pathways, suggesting its possible use as a therapeutic tool for the prevention of diabetes at early stages of its development (prediabetes).
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Affiliation(s)
- Luciana Di Sarli Gutiérrez
- CENEXA (Centre for Experimental and Applied Endocrinology, UNLP CONICET CCT La Plata, CEAS CICPBA), School of Medicine, Street 60 and 120, La Plata 1900, Argentina; (L.D.S.G.); (M.C.C.); (S.F.V.); (H.G.V.); (B.M.)
| | - María Cecilia Castro
- CENEXA (Centre for Experimental and Applied Endocrinology, UNLP CONICET CCT La Plata, CEAS CICPBA), School of Medicine, Street 60 and 120, La Plata 1900, Argentina; (L.D.S.G.); (M.C.C.); (S.F.V.); (H.G.V.); (B.M.)
| | - Sherley Farromeque Vásquez
- CENEXA (Centre for Experimental and Applied Endocrinology, UNLP CONICET CCT La Plata, CEAS CICPBA), School of Medicine, Street 60 and 120, La Plata 1900, Argentina; (L.D.S.G.); (M.C.C.); (S.F.V.); (H.G.V.); (B.M.)
| | - Hernán Gonzalo Villagarcía
- CENEXA (Centre for Experimental and Applied Endocrinology, UNLP CONICET CCT La Plata, CEAS CICPBA), School of Medicine, Street 60 and 120, La Plata 1900, Argentina; (L.D.S.G.); (M.C.C.); (S.F.V.); (H.G.V.); (B.M.)
| | - Luisa González Arbeláez
- CIC (Centre for Cardiovascular Research, UNLP CONICET CCT La Plata), School of Medicine, Street 60 and 120, La Plata 1900, Argentina;
| | - Benjamín Rojano
- Food Science Laboratory, Faculty of Sciences, National University of Colombia, Medellín Campus, Medellin 050034, Colombia;
| | - Guillermo Schinella
- School of Medicine, UNLP, Street 60 and 120, La Plata 1900, Argentina;
- Institute of Health Sciences, UNAJ-CICPBA, Av. Calchaquí 6200, Florencio Varela 1888, Argentina
| | - Bárbara Maiztegui
- CENEXA (Centre for Experimental and Applied Endocrinology, UNLP CONICET CCT La Plata, CEAS CICPBA), School of Medicine, Street 60 and 120, La Plata 1900, Argentina; (L.D.S.G.); (M.C.C.); (S.F.V.); (H.G.V.); (B.M.)
| | - Flavio Francini
- CENEXA (Centre for Experimental and Applied Endocrinology, UNLP CONICET CCT La Plata, CEAS CICPBA), School of Medicine, Street 60 and 120, La Plata 1900, Argentina; (L.D.S.G.); (M.C.C.); (S.F.V.); (H.G.V.); (B.M.)
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Haeri MR. Diabetes and diabesity in the view of proteomics, drug, and plant-derived remedies. JOURNAL OF RESEARCH IN MEDICAL SCIENCES : THE OFFICIAL JOURNAL OF ISFAHAN UNIVERSITY OF MEDICAL SCIENCES 2023; 28:77. [PMID: 38152069 PMCID: PMC10751518 DOI: 10.4103/jrms.jrms_487_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/08/2023] [Accepted: 07/31/2023] [Indexed: 12/29/2023]
Abstract
Diabetes and obesity are highly prevalent in the world. Proteomics is a promising approach to better understanding enzymes, proteins, and signaling molecules involved in diabetes processes which help recognize the basis of the disease better and find suitable new treatments. This study aimed to summarize the molecular mechanisms from the beginning of insulin secretion in response to stimuli to the pathology of the insulin signaling pathway and, finally, the mechanisms of drugs/chemicals remedies that affect this process. The titles and subtitles of this process were determined, and then for each of them, the articles searched in PubMed and ScienceDirect were used. This review article starts the discussion with the molecular basis of insulin biosynthesis, secretion, insulin's mechanism of action, and molecular aspect of diabetes and diabesity (a new term showing the relation between diabetes and obesity) and ends with the drug and plant-derived intervention for hyperglycemia.
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Affiliation(s)
- Mohammad Reza Haeri
- Department of Clinical Biochemistry, Faculty of Medicine, Qom University of Medical Sciences, Qom, Iran
- Reference Laboratory, Qom University of Medical Sciences, Qom, Iran
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Castro MC, Villagarcía HG, Schinella G, Massa ML, Francini F. Mechanism of preventive effects of exendin-4 and des-fluoro-sitagliptin in a murine model of fructose-induced prediabetes. Biochim Biophys Acta Mol Cell Biol Lipids 2023:159363. [PMID: 37429413 DOI: 10.1016/j.bbalip.2023.159363] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/23/2023] [Accepted: 07/05/2023] [Indexed: 07/12/2023]
Abstract
Protective effects of exendin-4 (glucagon-like peptide-1 -GLP-1- receptor agonist) and des-fluoro-sitagliptin (dipeptidyl peptidase-4 inhibitor) on fructose-induced hepatic disturbances were evaluated in prediabetic rats. Complementary, a possible direct effect of exendin-4 in human hepatoblastoma-derived cell line HepG2 incubated with fructose in presence/absence of exendin-9-39 (GLP-1 receptor antagonist) was investigated. In vivo, after 21 days of fructose rich diet, we determined: glycemia, insulinemia, and triglyceridemia; hepatic fructokinase, AMP-deaminase, and G-6-P dehydrogenase (G-6-P DH) activities; carbohydrate-responsive element-binding protein (ChREBP) expression; triglyceride content and lipogenic gene expression (glycerol-3-phosphate acyltransferase -GPAT-, fatty acid synthase -FAS-, sterol regulatory element-binding protein-1c -SREBP-1c); oxidative stress and inflammatory markers expression. In HepG2 cells we measured fructokinase activity and triglyceride content. Hypertriglyceridemia, hyperinsulinemia, enhanced liver fructokinase, AMP-deaminase, and G-6-P DH activities, increased ChREBP and lipogenic genes expression, enhanced triglyceride level, oxidative stress and inflammatory markers recorded in fructose fed animals, were prevented by co-administration of either exendin-4 or des-fluoro-sitagliptin. Exendin-4 prevented fructose-induced increase in fructokinase activity and triglyceride contain in HepG2 cells. These effects were blunted co-incubating with exendin-9-39. The results demonstrated for the first time that exendin-4/des-fluro-sitagliptin prevented fructose-induced endocrine-metabolic oxidative stress and inflammatory changes probably acting on the purine degradation pathway. Exendin 9-39 blunted in vitro protective exendin-4 effects, thereby suggesting a direct effect of this compound on hepatocytes through GLP-1 receptor. Direct effect on fructokinase and AMP-deaminase activities, with a key role in the pathogenesis of liver dysfunction induced by fructose, suggests purine degradation pathway constitute a potential therapeutic objective for GLP-1 receptor agonists.
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Affiliation(s)
- María Cecilia Castro
- Centro de Endocrinología Experimental y Aplicada - CENEXA (UNLP-CONICET CCT LA PLATA CEAS CICPBA), Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Street 60 and 120, La Plata 1900, Argentina.
| | - Hernán Gonzalo Villagarcía
- Centro de Endocrinología Experimental y Aplicada - CENEXA (UNLP-CONICET CCT LA PLATA CEAS CICPBA), Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Street 60 and 120, La Plata 1900, Argentina.
| | - Guillermo Schinella
- Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Street 60 and 120, La Plata 1900, Argentina; Instituto de Ciencias de la Salud, UNAJ-CICPBA, Street Avenue Calchaqui 6200, Florencio Varela 1888, Argentina.
| | - María Laura Massa
- Centro de Endocrinología Experimental y Aplicada - CENEXA (UNLP-CONICET CCT LA PLATA CEAS CICPBA), Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Street 60 and 120, La Plata 1900, Argentina.
| | - Flavio Francini
- Centro de Endocrinología Experimental y Aplicada - CENEXA (UNLP-CONICET CCT LA PLATA CEAS CICPBA), Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Street 60 and 120, La Plata 1900, Argentina.
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