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New Insights on the Regulation of the Insulin-Degrading Enzyme: Role of microRNAs and RBPs. Cells 2022; 11:cells11162538. [PMID: 36010613 PMCID: PMC9406717 DOI: 10.3390/cells11162538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/04/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022] Open
Abstract
The evident implication of the insulin-degrading enzyme (IDE) in Alzheimer’s disease (AD) and type 2 diabetes mellitus (T2DM), among its capacity to degrade insulin and amyloid-β peptide (Aβ), suggests that IDE could be an essential link in the relation between hyperinsulinemia, insulin resistance and AD. However, little is known about the cellular and molecular regulation of IDE expression, and even less has been explored regarding the post-transcriptional regulation of IDE, although it represents a great molecular target of interest for therapeutic treatments. We recently described that miR-7, a novel candidate for linking AD and T2DM at the molecular level, regulates IDE and other key genes in both pathologies, including some key genes involved in the insulin signaling pathway. Here, we explored whether other miRNAs as well as other post-transcriptional regulators, such as RNA binding proteins (RBP), could potentially participate in the regulation of IDE expression in vitro. Our data showed that in addition to miR-7, miR-125, miR-490 and miR-199 regulate IDE expression at the post-transcriptional level. Moreover, we also found that IDE contains multiple potential binding sites for several RBPs, and a narrow-down prediction analysis led us to speculate on a novel regulation of IDE by RALY and HuD. Taken together, these results demonstrate the novel players controlling IDE expression that could represent potential therapeutical targets to treat several metabolic diseases with a high impact on human health, including AD and T2DM.
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Voica C, Nechita C, Iordache AM, Roba C, Zgavarogea R, Ionete RE. ICP-MS Assessment of Essential and Toxic Trace Elements in Foodstuffs with Different Geographic Origins Available in Romanian Supermarkets. Molecules 2021; 26:molecules26237081. [PMID: 34885663 PMCID: PMC8658825 DOI: 10.3390/molecules26237081] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 02/07/2023] Open
Abstract
The present study was conducted to quantify the daily intake and target hazard quotient of four essential elements, namely, chromium, cobalt, nickel, and copper, and four toxic trace elements, mercury, cadmium, lead, and arsenic. Thirty food items were assigned to five food categories (seeds, leaves, powders, beans, and fruits) and analyzed using inductively coupled plasma-mass spectrometry. Factor analysis after principal component extraction revealed common metal patterns in all foodstuffs, and using hierarchical cluster analysis, an association map was created to illustrate their similarity. The results indicate that the internationally recommended dietary allowance was exceeded for Cu and Cr in 27 and 29 foodstuffs, respectively. According to the tolerable upper level for Ni and Cu, everyday consumption of these elements through repeated consumption of seeds (fennel, opium poppy, and cannabis) and fruits (almond) can have adverse health effects. Moreover, a robust correlation between Cu and As (p < 0.001) was established when all samples were analyzed. Principal component analysis (PCA) demonstrated an association between Pb, As, Co, and Ni in one group and Cr, Cu, Hg, and Cd in a second group, comprising 56.85% of the total variance. For all elements investigated, the cancer risk index was within safe limits, highlighting that lifetime consumption does not increase the risk of carcinogens.
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Affiliation(s)
- Cezara Voica
- National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Str., 400293 Cluj-Napoca, Romania;
| | - Constantin Nechita
- National Research and Development Institute for Forestry “Marin Drăcea”—INCDS, 725100 Câmpulung Moldovenesc, Romania
- Correspondence: (C.N.); (A.M.I.); (R.Z.)
| | - Andreea Maria Iordache
- National Research and Development Institute of Cryogenics and Isotopic Technologies—ICSI Rm. Valcea, 4 Uzinei Str., 240050 Rm. Valcea, Romania;
- Correspondence: (C.N.); (A.M.I.); (R.Z.)
| | - Carmen Roba
- Faculty of Environmental Science and Engineering, Babeş-Bolyai University, 30 Fantanele Str., 400294 Cluj-Napoca, Romania;
| | - Ramona Zgavarogea
- National Research and Development Institute of Cryogenics and Isotopic Technologies—ICSI Rm. Valcea, 4 Uzinei Str., 240050 Rm. Valcea, Romania;
- Correspondence: (C.N.); (A.M.I.); (R.Z.)
| | - Roxana Elena Ionete
- National Research and Development Institute of Cryogenics and Isotopic Technologies—ICSI Rm. Valcea, 4 Uzinei Str., 240050 Rm. Valcea, Romania;
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Spears JW, Lloyd KE, Siciliano P, Pratt-Phillips S, Goertzen EW, McLeod SJ, Moore J, Krafka K, Hyda J, Rounds W. Chromium propionate increases insulin sensitivity in horses following oral and intravenous carbohydrate administration. J Anim Sci 2020; 98:skaa095. [PMID: 32211767 PMCID: PMC7323256 DOI: 10.1093/jas/skaa095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 03/20/2020] [Indexed: 11/13/2022] Open
Abstract
Forty-eight Quarter Horse geldings (3 to 8 yr of age) were used to determine the effects of dietary chromium (Cr), in the form of Cr propionate (Cr Prop) on insulin sensitivity. Horses were blocked by age, body condition score, and glucose response to concentrate feeding on day 0 and randomly assigned to treatments. Treatments consisted of 0, 2, 4, or 8 mg Cr/d from Cr Prop. Horses were fed daily a concentrate mix at a rate of 0.2 kg/100 kg body weight (BW) and grass hay at 1.75 to 2.0 kg/100 kg BW. All horses were fed the control diet for 7 d prior to the initiation of the study. After an overnight fast, blood samples from the jugular vein were obtained at 0, 2, and 4 h after concentrate feeding on days 0 and 28 for the determination of glucose, nonesterified fatty acids, and insulin. A glucose tolerance test (GTT) was conducted on day 42. Glucose was infused via jugular vein catheters, and blood samples were collected at various times relative to dosing for glucose and insulin determination. Plasma glucose on day 28 was affected (P < 0.05) by treatment, time, and treatment × time. Horses fed 4 mg Cr/d had lesser (P < 0.05) plasma glucose concentrations than those in the other treatments at 0 h. At 2 h post-feeding glucose concentrations were greater (P < 0.05) in horses fed 0 or 8 mg Cr/d than in those given 4 mg Cr. Horses fed 2 mg Cr/d had lesser (P < 0.05) plasma glucose at 4 h post feeding compared with those fed 0 or 8 mg Cr. Plasma glucose did not differ among horses receiving 2 or 4 mg Cr/d at 2 or 4 h. Serum insulin was affected (P < 0.05) by treatment, time, and treatment × time. Insulin concentrations were greater (P < 0.05) in horses fed 0 or 2 mg Cr/d than in those given 4 or 8 mg Cr at 0 h. At 4 h post-feeding insulin concentrations were greater (P < 0.05) in horses given 0 or 8 mg Cr than in those fed 2 or 4 mg Cr/d. Plasma glucose was affected (P < 0.05) by treatment and time, but not by treatment × time following the GTT. Mean plasma glucose (across sampling times) concentrations were greater (P < 0.05) in controls than in horses fed 2 or 4 mg Cr/d. Glucose concentrations following the GTT did not differ among controls and horses given 8 mg Cr/d. Following glucose infusion, serum insulin concentrations were greater (P < 0.05) in horses fed 2 or 4 mg Cr and tended to be greater in those fed 8 mg Cr/d compared with controls. The results of this study indicate that 2 or 4 mg Cr/d from Cr Prop increased insulin sensitivity in adult horses following oral carbohydrate consumption.
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Affiliation(s)
- Jerry W Spears
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | - Karen E Lloyd
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | - Paul Siciliano
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | | | - Ellen W Goertzen
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | - Sarah J McLeod
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | - Jennifer Moore
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | | | - Jill Hyda
- Kemin AgriFoods North America, Inc., Des Moines, IA
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New insight into the mechanisms of achieving antiretroviral therapy-free HIV-1 control. AIDS 2018; 32:2839-2840. [PMID: 30407254 DOI: 10.1097/qad.0000000000002009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chang GR, Chen WK, Hou PH, Mao FC. Isoproterenol exacerbates hyperglycemia and modulates chromium distribution in mice fed with a high fat diet. J Trace Elem Med Biol 2017; 44:315-321. [PMID: 28965593 DOI: 10.1016/j.jtemb.2017.09.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 08/23/2017] [Accepted: 09/13/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND PURPOSE Isoproterenol (ISO), a nonselective β-adrenoceptor agonist for treating bradycardia and asthma, has been proposed to raise blood glucose level. Little is known regarding the relationship between ISO treatment, the induced chromium (Cr) redistribution, and changes in glucose metabolism. We aimed to characterize the effects of a single dose of ISO on glucose homeostasis and Cr level changes in an obesity mouse model. METHODS Mice (C57BL6/j strain) were first fed for a continuous period of 12 weeks with either a high fat diet (HFD), to develop an obesity animal model, or a standard diet (SD), to develop a lean animal model as controls. These groups were each separated into two subgroups to receive either a single dose of ISO or saline (control). We measured in vivo their metabolic parameters, fasting glucose level, area under the curve (AUC) for glucose level time profile, insulin level time profile, insulin sensitivity index, and chromium distribution. RESULTS After a single dose of ISO, the SD-fed mice had slightly higher blood glucose levels compared with the SD controls, when the level was measured 30 and 60min after injection. By contrast, the ISO-treated HFD-fed mice had significantly higher blood glucose levels and AUC during the entire 120min following one administration compared with the HFD control group. Additionally, they had a substantially lower HOMA-IR index, whereas insulin levels remained unchanged. The Cr level in their bones and liver was decreased, and loss of Cr through urinary excretion was elevated. CONCLUSION The results demonstrated that ISO exacerbated hyperglycemic syndrome in the obesity animal model. ISO induced a net negative Cr balance as a result of increased urinary excretion, leading to Cr mobilization that was not desirable to overcome the hyperglycemia.
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Affiliation(s)
- Geng-Ruei Chang
- Department of Veterinary Medicine, National Chiayi University, 580 Xinmin Road, Chiayi 60054, Taiwan, ROC; Department of Veterinary Medicine, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 40227, Taiwan, ROC
| | - Wen-Kai Chen
- Department of Veterinary Medicine, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 40227, Taiwan, ROC
| | - Po-Hsun Hou
- Department of Veterinary Medicine, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 40227, Taiwan, ROC; Department of Psychiatry, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4, Taichung 40705, Taiwan, ROC
| | - Frank Chiahung Mao
- Department of Veterinary Medicine, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 40227, Taiwan, ROC.
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Tundo GR, Di Muzio E, Ciaccio C, Sbardella D, Di Pierro D, Polticelli F, Coletta M, Marini S. Multiple allosteric sites are involved in the modulation of insulin-degrading-enzyme activity by somatostatin. FEBS J 2016; 283:3755-3770. [PMID: 27579517 DOI: 10.1111/febs.13841] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/18/2016] [Accepted: 08/30/2016] [Indexed: 11/30/2022]
Abstract
Somatostatin is a cyclic peptide, released in the gastrointestinal system and the central nervous system, where it is involved in the regulation of cognitive and sensory functions, motor activity and sleep. It is a substrate of insulin-degrading enzyme (IDE), as well as a modulator of its activity and expression. In the present study, we have investigated the modulatory role of somatostatin on IDE activity at 37 °C and pH 7.3 for various substrates [i.e. insulin, β-amyloid (Aβ)1-40 and bradykinin], aiming to quantitatively characterize the correlation between the specific features of the substrates and the regulatory mechanism. Functional data indicate that somatostatin, in addition to the catalytic site of IDE (being a substrate), is also able to bind to two additional exosites, which play different roles according to the size of the substrate and its binding mode to the IDE catalytic cleft. In particular, one exosite, which displays high affinity for somatostatin, regulates only the interaction of IDE with larger substrates (such as insulin and Aβ1-40 ) in a differing fashion according to their various modes of binding to the enzyme. A second exosite, which is involved in the regulation of enzymatic processing by IDE of all substrates investigated (including a 10-25 amino acid long amyloid-like peptide, bradykinin and somatostatin itself, which had been studied previously), probably acts through the alteration of an 'open-closed' equilibrium.
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Affiliation(s)
- Grazia R Tundo
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Italy.,Interuniversity Consortium for the Research on Chemistry of Metals in Biological Systems, Bari, Italy
| | | | - Chiara Ciaccio
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Italy.,Interuniversity Consortium for the Research on Chemistry of Metals in Biological Systems, Bari, Italy
| | - Diego Sbardella
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Italy.,Interuniversity Consortium for the Research on Chemistry of Metals in Biological Systems, Bari, Italy
| | - Donato Di Pierro
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Italy
| | - Fabio Polticelli
- Department of Sciences, University of Roma Tre, Italy.,National Institute of Nuclear Physics, Roma Tre Section, Italy
| | - Massimo Coletta
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Italy.,Interuniversity Consortium for the Research on Chemistry of Metals in Biological Systems, Bari, Italy
| | - Stefano Marini
- Department of Clinical Sciences and Translational Medicine, University of Roma Tor Vergata, Italy. .,Interuniversity Consortium for the Research on Chemistry of Metals in Biological Systems, Bari, Italy.
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Ghadieh HE, Smiley ZN, Kopfman MW, Najjar MG, Hake MJ, Najjar SM. Chlorogenic acid/chromium supplement rescues diet-induced insulin resistance and obesity in mice. Nutr Metab (Lond) 2015; 12:19. [PMID: 26045713 PMCID: PMC4455985 DOI: 10.1186/s12986-015-0014-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 05/08/2015] [Indexed: 12/15/2022] Open
Abstract
Abdominal obesity is a major risk factor for insulin resistance, type 2 diabetes and cardiovascular diseases. Dietary fat induces insulin resistance in humans and rodents. The current study investigates whether a Chlorogenic acid/Chromium III supplement rescues obesity and insulin resistance caused by high-fat feeding of male C57BL/6 J mice for 7 weeks. Administering an oral daily dose of this supplement in the last 3 weeks of feeding reversed diet-induced body weight gain and insulin resistance, assessed by hyperglycemia, glucose intolerance and insulin intolerance. Indirect calorimetry analysis revealed that this effect is mediated at least partly, by increasing energy expenditure and spontaneous locomoter activity. These findings underscore the important role that chlorogenic acid and chromium play in maintaining glucose metabolism and insulin response in mice fed a high-fat diet.
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Affiliation(s)
- Hilda E Ghadieh
- Center for Diabetes and Endocrine Research (CeDER), College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA ; Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA
| | - Zachary N Smiley
- Center for Diabetes and Endocrine Research (CeDER), College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA ; Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA
| | - Melissa W Kopfman
- Center for Diabetes and Endocrine Research (CeDER), College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA ; Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA
| | - Mona G Najjar
- Center for Diabetes and Endocrine Research (CeDER), College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA ; Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA
| | - Michael J Hake
- Center for Diabetes and Endocrine Research (CeDER), College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA ; Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA
| | - Sonia M Najjar
- Center for Diabetes and Endocrine Research (CeDER), College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA ; Department of Physiology and Pharmacology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614 USA ; College of Medicine and Life Sciences, University of Toledo, Health Science Campus, 3000 Arlington Avenue, Mail stop 1009, Toledo, OH 43614 USA
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