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Franco C, Canzoniero LMT. Zinc homeostasis and redox alterations in obesity. Front Endocrinol (Lausanne) 2024; 14:1273177. [PMID: 38260166 PMCID: PMC10800374 DOI: 10.3389/fendo.2023.1273177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 12/18/2023] [Indexed: 01/24/2024] Open
Abstract
Impairment of both cellular zinc and redox homeostasis is a feature of several chronic diseases, including obesity. A significant two-way interaction exists between redox metabolism and the relatively redox-inert zinc ion. Redox metabolism critically influences zinc homeostasis and controls its cellular availability for various cellular functions by regulating zinc exchange from/to zinc-binding proteins. Zinc can regulate redox metabolism and exhibits multiple pro-antioxidant properties. On the other hand, even minor disturbances in zinc status and zinc homeostasis affect systemic and cellular redox homeostasis. At the cellular level, zinc homeostasis is regulated by a multi-layered machinery consisting of zinc-binding molecules, zinc sensors, and two selective families of zinc transporters, the Zinc Transporter (ZnT) and Zrt, Irt-like protein (ZIP). In the present review, we summarize the current state of knowledge on the role of the mutual interaction between zinc and redox homeostasis in physiology and pathophysiology, pointing to the role of zinc in the alterations responsible for redox stress in obesity. Since zinc transporters primarily control zinc homeostasis, we describe how changes in the expression and activity of these zinc-regulating proteins are associated with obesity.
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Paez DT, Mendes Garrido Abregú F, Ciancio Del Giudice N, Soria D, Fariña G, Álvarez JH, Fasoli HJ, Zago V, Elesgaray R, Caniffi C, Arranz C, Tomat AL. Zinc deficiency and a high-fat diet during growth: Metabolic and adipocyte alterations in rats. Nutr Metab Cardiovasc Dis 2023; 33:1808-1816. [PMID: 37419750 DOI: 10.1016/j.numecd.2023.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 05/26/2023] [Accepted: 06/05/2023] [Indexed: 07/09/2023]
Abstract
BACKGROUND AND AIMS To evaluate the effects of a high-fat diet during post-weaning growth on intermediate metabolism and retroperitoneal adipose tissue, in adult male rats exposed to adequate or deficient zinc intake during prenatal and postnatal life. METHODS AND RESULTS Female Wistar rats were fed low- or control-zinc diets from pregnancy to offspring weaning. Male offspring born from control mothers were fed either control or high-fat, control-zinc diets for 60 days. Male offspring born from zinc deficient mothers were fed either low-zinc or high-fat, low-zinc diets for 60 days. At 74 days of life, oral glucose tolerance test was performed. In 81-day-old offspring, blood pressure, lipid profile, plasmatic lipid peroxidation and serum adiponectin level were determined. In retroperitoneal adipose tissue, we evaluated oxidative stress, morphology and adipocytokines mRNA expression. Low-zinc diet induced adipocytes hypertrophy, increased oxidative stress, and decreased adiponectin mRNA expression in adipose tissue. Low-zinc diet increased systolic blood pressure, triglyceridemia, plasmatic lipid peroxidation and glycemia at 3 h after glucose overload. Animals fed high-fat or high-fat, low-zinc diets showed adipocytes hypertrophy, decreased adiponectin mRNA expression, and increased leptin mRNA expression and oxidative stress in adipose tissue. They also exhibited decreased serum adiponectin levels, increased triglyceridemia, plasmatic lipid peroxidation and area under the oral glucose tolerance curve. High-fat, low-zinc diet induced greater alterations in adipocyte hypertrophy, leptin mRNA expression and glucose tolerance test than high-fat diet. CONCLUSION Zinc deficiency since early stages of intrauterine life could increase susceptibility to metabolic alterations induced by high-fat diets during postnatal life.
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Affiliation(s)
- Diamela T Paez
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Fisiología, Junín 956, Piso 7, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Junín 956, Piso 2, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina
| | - Facundo Mendes Garrido Abregú
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Fisiología, Junín 956, Piso 7, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Junín 956, Piso 2, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina
| | - Nicolas Ciancio Del Giudice
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Fisiología, Junín 956, Piso 7, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Junín 956, Piso 2, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina
| | - Damián Soria
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Fisiología, Junín 956, Piso 7, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Junín 956, Piso 2, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina
| | - Gregorio Fariña
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Bioquímica Clínica, Laboratorio de Lípidos y Aterosclerosis, Instituto de Fisiopatología y Bioquímica Clínica (INFIBIOC), Av. Córdoba 2351 Piso 1º, Ciudad Autónoma de Buenos Aires, Argentina
| | - Juan H Álvarez
- Universidad de la Defensa Nacional (UNDEF), Facultad de Ingeniería del Ejército, Cabildo 15, CP 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Héctor J Fasoli
- Universidad de la Defensa Nacional (UNDEF), Facultad de Ingeniería del Ejército, Cabildo 15, CP 1428, Ciudad Autónoma de Buenos Aires, Argentina
| | - Valeria Zago
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Bioquímica Clínica, Laboratorio de Lípidos y Aterosclerosis, Instituto de Fisiopatología y Bioquímica Clínica (INFIBIOC), Av. Córdoba 2351 Piso 1º, Ciudad Autónoma de Buenos Aires, Argentina
| | - Rosana Elesgaray
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Fisiología, Junín 956, Piso 7, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Junín 956, Piso 2, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina
| | - Carolina Caniffi
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Fisiología, Junín 956, Piso 7, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Junín 956, Piso 2, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina
| | - Cristina Arranz
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Fisiología, Junín 956, Piso 7, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Junín 956, Piso 2, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina
| | - Analía L Tomat
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Fisiología, Junín 956, Piso 7, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Instituto de la Química y Metabolismo del Fármaco (IQUIMEFA), Junín 956, Piso 2, CP 1113, Ciudad Autónoma de Buenos Aires, Argentina.
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Newberry C, Kumar S. Dietary and nutrition considerations in caring for patients with nonalcoholic fatty liver disease: Updates for the practicing clinician. Nutr Clin Pract 2023; 38:70-79. [PMID: 36183354 DOI: 10.1002/ncp.10917] [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: 06/01/2022] [Revised: 08/10/2022] [Accepted: 09/02/2022] [Indexed: 01/11/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the leading cause of chronic liver disease worldwide, affecting up to one-third of the global population. The disease is defined by excess fat deposition in the liver and has a strong correlation with metabolic syndrome, which, in turn, is also a risk factor for disease progression, including the development of steatohepatitis, advanced fibrosis, cirrhosis, and hepatocellular carcinoma. Although a number of medications are being explored for disease mitigation, nothing is currently approved, and the mainstay of therapy remains dietary and lifestyle intervention that promotes weight loss as well as management of comorbid conditions. The landscape that guides care for patients with NAFLD continues to evolve. Clinicians caring for these patients need to consider underlying disease state and nutrition risk in addition to concurrent related diagnoses, such as insulin resistance and hyperlipidemia, when formulating treatment plans. The following is a comprehensive review of the current dietary and nutrition considerations in the management of patients with NAFLD, with a special emphasis on implications for the practicing clinician.
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Affiliation(s)
- Carolyn Newberry
- Division of Gastroenterology, Innovative Center for Health and Nutrition in Gastroenterology (ICHANGE), Weill Cornell Medical Center, New York, New York, USA
| | - Sonal Kumar
- Division of Gastroenterology, Innovative Center for Health and Nutrition in Gastroenterology (ICHANGE), Weill Cornell Medical Center, New York, New York, USA
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Long KZ, Beckmann J, Lang C, Seelig H, Nqweniso S, Probst-Hensch N, Müller I, Pühse U, Steinmann P, du Randt R, Walter C, Utzinger J, Gerber M. Impact of a school-based health intervention program on body composition among South African primary schoolchildren: results from the KaziAfya cluster-randomized controlled trial. BMC Med 2022; 20:27. [PMID: 35081959 PMCID: PMC8793158 DOI: 10.1186/s12916-021-02223-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 12/20/2021] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The prevalence of overweight and obesity is increasing among African children potentially predisposing them to greater obesity and non-communicable diseases (NCDs) in adulthood. This risk may be higher among growth-impaired children who may have greater fat mass. Therefore, we examined the effects of school-based physical activity (PA) promotion and multi-micronutrient supplementation (MMNS) on body composition among South African children enrolled in a longitudinal school-based randomized controlled trial. METHODS Children were cluster-randomized by class to one of four groups: (a) a physical activity group (PA), (b) a multi-micronutrient supplementation group (MMNS), (c) a physical activity + multi-micronutrient supplementation group (PA + MMNS), and (d) control group, and were being followed for 3 years. Linear random effects regression models with random intercepts for school classes tested the associations of each intervention arm with overall fat mass (FM), fat-free mass (FFM), truncal fat mass (TrFM), and truncal fat-free mass (TrFFM) at 9 months (T2) for boys and girls. These differences were then explored among children who differed in height velocity (HV). RESULTS A total of 1304 children (614 girls, 667 boys) in twelve clusters were assessed at baseline and after 9 months follow-up (T2). At baseline, approximately 15% of children were classified as overweight or obese while approximately 38% of children were classified as mildly stunted or moderately/severely stunted. Among girls, promotion of PA was associated with reduced FM and TrFM at T2 while MMNS was associated with increased FFM. Children with reduced HV in the PA arm had reduced FM while children in the MMNS arm with lower HV had increased FM compared to children in the control arm. Similarly, children with lower HV in the MM and PA groups had reduced TrFM compared to children in the control arm. CONCLUSIONS Our study suggests that the promotion of school-based physical activity programs and micronutrient supplementation can reduce childhood adiposity and so reduce the risk of obesity and chronic diseases later in adulthood. TRIAL REGISTRATION ISRCTN, ISRCTN29534081 . Registered on August 9, 2018. The trial was designed, analyzed, and interpreted based on the CONSORT protocol (Additional file 1: CONSORT checklist for randomized trial).
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Affiliation(s)
- Kurt Z Long
- Swiss Tropical and Public Health Institute, University of Basel, Socinstrasse 57, 4051, Basel, Switzerland.
| | - Johanna Beckmann
- Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland
| | - Christin Lang
- Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland
| | - Harald Seelig
- Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland
| | - Siphesihle Nqweniso
- Department of Human Movement Science, Nelson Mandela University, Port Elizabeth, South Africa
| | - Nicole Probst-Hensch
- Swiss Tropical and Public Health Institute, University of Basel, Socinstrasse 57, 4051, Basel, Switzerland
| | - Ivan Müller
- Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland
| | - Uwe Pühse
- Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland
| | - Peter Steinmann
- Swiss Tropical and Public Health Institute, University of Basel, Socinstrasse 57, 4051, Basel, Switzerland
| | - Rosa du Randt
- Department of Human Movement Science, Nelson Mandela University, Port Elizabeth, South Africa
| | - Cheryl Walter
- Department of Human Movement Science, Nelson Mandela University, Port Elizabeth, South Africa
| | - Jürg Utzinger
- Swiss Tropical and Public Health Institute, University of Basel, Socinstrasse 57, 4051, Basel, Switzerland
| | - Markus Gerber
- Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland
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Zohal M, Jam-Ashkezari S, Namiranian N, Moosavi A, Ghadiri-Anari A. Association between selected trace elements and body mass index and waist circumference: A cross sectional study. Diabetes Metab Syndr 2019; 13:1293-1297. [PMID: 31336480 DOI: 10.1016/j.dsx.2019.01.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 01/17/2019] [Indexed: 11/20/2022]
Abstract
BACKGROUND The prevalence of obesity has increased worldwide. Abnormal plasma level of some trace elements may be associated with obesity. The present study was designed to compare the plasma level of zinc, phosphate, calcium and magnesium with the degree of body mass index and waist circumference. MATERIAL AND METHODS In this cross sectional study 149 persons (20-60 years old) from March 2014 till April 2017 were included. Definition of central obesity was waist circumference (WC)≥ 102 cm and ≥88 cm in men and women, respectively. Also BMI categorized to: normal weight: 18.50-24.99, overweight: 25.00-29.99 and obese: ≥30 kg/m2 respectively. Mg, Ca, P and Zinc in plasma was checked after12 h fasting in each persons. Comparison between the level of Mg, P, Ca and Zinc by three categories of BMI or waist circumference performed. The data were analyzed by independent T-test and one-way ANOVA. Scheffe method was used to determine post-hoc pair-wise comparisons. The relationship between BMI and concentration of elements was detected by linear correlation and Cubic model. A p ≤ 0.05 were considered statistically significant. Statistical analyses were executed by SPSS version 20. RESULTS In this study, 32.2% male and remainder female, mean age of 42.26 ± 13.03 were participated. 40.9% were normal and 59.1% obese base on waist circumference. Also 24.8% normal,44.3% overweight and remainder was obese according to BMI. Obese subjects base on waist circumference had significantly lower serum Zinc(pvalue:0.002), Ca (pvalue:0.0001)and Mg(pvalue:0.042) concentration. Whereas, P concentration was significantly higher in obese cases in comparison with normal subjects(pvalue:0.012). Also normal cases had significantly higher serum Zinc (pvalue: 0.0001), Ca (pvalue:0.0001), and Mg(pvalue:0.006) concentration compared to overweight and obese subjects according to BMI categorizes. CONCLUSION Inverse correlation present between plasma zinc, calcium and magnesium level and BMI and waist circumference, but positive correlation seen between P level and waist circumference. Further studies are needed to evaluate the effect of dietary or supplemental interventions on obesity and central obesity.
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Affiliation(s)
- Mahnaz Zohal
- Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Saeedeh Jam-Ashkezari
- Diabetes Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Nasim Namiranian
- Diabetes Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Amin Moosavi
- Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Akram Ghadiri-Anari
- Diabetes Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
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Metabolic Effects of Oral Phenelzine Treatment on High-Sucrose-Drinking Mice. Int J Mol Sci 2018; 19:ijms19102904. [PMID: 30257452 PMCID: PMC6213466 DOI: 10.3390/ijms19102904] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 09/13/2018] [Accepted: 09/20/2018] [Indexed: 01/01/2023] Open
Abstract
Phenelzine has been suggested to have an antiobesity effect by inhibiting de novo lipogenesis, which led us to investigate the metabolic effects of oral chronic phenelzine treatment in high-sucrose-drinking mice. Sucrose-drinking mice presented higher body weight gain and adiposity versus controls. Phenelzine addition did not decrease such parameters, even though fat pad lipid content and weights were not different from controls. In visceral adipocytes, phenelzine did not impair insulin-stimulated de novo lipogenesis and had no effect on lipolysis. However, phenelzine reduced the mRNA levels of glucose transporters 1 and 4 and phosphoenolpyruvate carboxykinase in inguinal white adipose tissue (iWAT), and altered circulating levels of free fatty acids (FFA) and glycerol. Interestingly, glycemia was restored in phenelzine-treated mice, which also had higher insulinaemia. Phenelzine-treated mice presented higher rectal temperature, which was associated to reduced mRNA levels of uncoupling protein 1 in brown adipose tissue. Furthermore, unlike sucrose-drinking mice, hepatic malondialdehyde levels were not altered. In conclusion, although de novo lipogenesis was not inhibited by phenelzine, the data suggest that the ability to re-esterify FFA is impaired in iWAT. Moreover, the effects on glucose homeostasis and oxidative stress suggest that phenelzine could alleviate obesity-related alterations and deserves further investigation in obesity models.
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Pickett-Blakely O, Young K, Carr RM. Micronutrients in Nonalcoholic Fatty Liver Disease Pathogenesis. Cell Mol Gastroenterol Hepatol 2018; 6:451-462. [PMID: 30294653 PMCID: PMC6170520 DOI: 10.1016/j.jcmgh.2018.07.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 07/19/2018] [Indexed: 02/06/2023]
Abstract
Micronutrients include electrolytes, minerals, vitamins, and carotenoids, and are required in microgram or milligram quantities for cellular metabolism. The liver plays an important role in micronutrient metabolism and this metabolism often is altered in chronic liver diseases. Here, we review how the liver contributes to micronutrient metabolism; how impaired micronutrient metabolism may be involved in the pathogenesis of nonalcoholic fatty liver disease (NAFLD), a systemic disorder of energy, glucose, and lipid homeostasis; and how insights gained from micronutrient biology have informed NAFLD therapeutics. Finally, we highlight some of the challenges and opportunities that remain with investigating the contribution of micronutrients to NAFLD pathology and suggest strategies to incorporate our understanding into the care of NAFLD patients.
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Affiliation(s)
| | | | - Rotonya M. Carr
- Division of Gastroenterology and Hepatology, University of Pennsylvania, Philadelphia, Pennsylvania
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Tahara A, Takasu T, Yokono M, Imamura M, Kurosaki E. Antidiabetic and antiobesity effects of SGLT2 inhibitor ipragliflozin in type 2 diabetic mice fed sugar solution. Eur J Pharmacol 2017; 818:545-553. [PMID: 29154936 DOI: 10.1016/j.ejphar.2017.11.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 10/18/2017] [Accepted: 11/13/2017] [Indexed: 01/14/2023]
Abstract
Obesity due to excessive calorie intake is a known aggravating factor contributing to the development and progression of type 2 diabetes. Recently, excessive intake of sugar-sweetened beverages has presented challenges in stemming the tide of obesity. Here, we investigated the possible effects of sugar solution intake on the antidiabetic effects of sodium-glucose cotransporter 2 (SGLT2) inhibitor ipragliflozin in type 2 diabetic mice that were fed ordinary drinking water, water + glucose solution, or water + sucrose solution. Under all feeding conditions, all mice exhibited type 2 diabetic symptoms, including hyperglycemia, hyperinsulinemia, and obesity; ipragliflozin subsequently improved these symptoms through increases in urinary glucose excretion. Effective dose of and response to ipragliflozin for diabetes improvement did not significantly differ by feeding condition. Further, under all feeding conditions, ipragliflozin administration resulted in significantly increased intake of both water and sugar solutions in association with increased urine volume resulting from increased urinary glucose excretion. In sugar solution-fed diabetic mice, ipragliflozin administration tended to slightly increase the proportion of sugar solution intake in total drinking volume, although not significantly so. In addition, ipragliflozin significantly decreased calorie balance, as calculated using calorie intake from food and sugar solution and calorie excretion via urinary glucose excretion. Our observation that the antidiabetic and antiobesity effects of the SGLT2 inhibitor ipragliflozin were not greatly affected by sugar solution intake in type 2 diabetic mice suggests that, in a clinical setting, ipragliflozin will remain an effective treatment for type 2 diabetic patients with excessive intake of carbohydrates.
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Affiliation(s)
- Atsuo Tahara
- Drug Discovery Research, Astellas Pharma Inc., Ibaraki, Japan.
| | | | - Masanori Yokono
- Drug Discovery Research, Astellas Pharma Inc., Ibaraki, Japan
| | | | - Eiji Kurosaki
- Drug Discovery Research, Astellas Pharma Inc., Ibaraki, Japan
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Zinc Prevents the Development of Diabetic Cardiomyopathy in db/db Mice. Int J Mol Sci 2017; 18:ijms18030580. [PMID: 28272348 PMCID: PMC5372596 DOI: 10.3390/ijms18030580] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 02/23/2017] [Accepted: 02/26/2017] [Indexed: 01/04/2023] Open
Abstract
Diabetic cardiomyopathy (DCM) is highly prevalent in type 2 diabetes (T2DM) patients. Zinc is an important essential trace metal, whose deficiency is associated with various chronic ailments, including vascular diseases. We assessed T2DM B6.BKS(D)-Leprdb/J (db/db) mice fed for six months on a normal diet containing three zinc levels (deficient, adequate, and supplemented), to explore the role of zinc in DCM development and progression. Cardiac function, reflected by ejection fraction, was significantly decreased, along with increased left ventricle mass and heart weight to tibial length ratio, in db/db mice. As a molecular cardiac hypertrophy marker, atrial natriuretic peptide levels were also significantly increased. Cardiac dysfunction and hypertrophy were accompanied by significantly increased fibrotic (elevated collagen accumulation as well as transforming growth factor β and connective tissue growth factor levels) and inflammatory (enhanced expression of tumor necrosis factor alpha, interleukin-1β, caspase recruitment domain family member 9, and B-cell lymphoma/leukemia 10, and activated p38 mitogen-activated protein kinase) responses in the heart. All these diabetic effects were exacerbated by zinc deficiency, and not affected by zinc supplementation, respectively. Mechanistically, oxidative stress and damage, mirrored by the accumulation of 3-nitrotyrosine and 4-hydroxy-2-nonenal, was significantly increased along with significantly decreased expression of Nrf2 and its downstream antioxidants (NQO-1 and catalase). This was also exacerbated by zinc deficiency in the db/db mouse heart. These results suggested that zinc deficiency promotes the development and progression of DCM in T2DM db/db mice. The exacerbated effects by zinc deficiency on the heart of db/db mice may be related to further suppression of Nrf2 expression and function.
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Nakajima S, Hira T, Iwaya H, Hara H. Zinc directly stimulates cholecystokinin secretion from enteroendocrine cells and reduces gastric emptying in rats. Mol Cell Endocrinol 2016; 430:108-14. [PMID: 27107934 DOI: 10.1016/j.mce.2016.04.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 04/06/2016] [Accepted: 04/19/2016] [Indexed: 12/27/2022]
Abstract
Zinc, an essential mineral element, regulates various physiological functions such as immune responses and hormone secretion. Cholecystokinin (CCK), a gut hormone, has a role in protective immunity through the regulation of gastrointestinal motility, appetite, and inflammatory response. Here, we examined the effect of zinc on CCK secretion in STC-1 cells, an enteroendocrine cell line derived from murine duodenum, and in rats. Extracellular zinc triggered CCK secretion accompanied with increased intracellular Ca(2+) and Zn(2+) mobilization in STC-1 cells. Zinc-induced CCK secretion was abolished in the absence of intracellular Zn(2+) or extracellular calcium. Upon inhibition of transient receptor potential ankyrin 1 (TRPA1), extracellular zinc failed to increase intracellular Ca(2+) and subsequent CCK secretion. In rats, oral zinc administration decreased gastric emptying through the activation of CCK signaling. These results suggest that zinc is a novel stimulant for CCK secretion through the activation of TRPA1 related to intracellular Zn(2+) and Ca(2+) mobilization.
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Affiliation(s)
- Shingo Nakajima
- Research Faculty of Health Science, Hokkaido University, Japan; Research Faculty of Agriculture, Hokkaido University, Japan
| | - Tohru Hira
- Research Faculty of Agriculture, Hokkaido University, Japan.
| | - Hitoshi Iwaya
- Research Faculty of Agriculture, Hokkaido University, Japan; La Jolla Institute for Allergy & Immunology, USA
| | - Hiroshi Hara
- Research Faculty of Agriculture, Hokkaido University, Japan
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Azab SFA, Saleh SH, Elsaeed WF, Elshafie MA, Sherief LM, Esh AMH. Serum trace elements in obese Egyptian children: a case-control study. Ital J Pediatr 2014; 40:20. [PMID: 24555483 PMCID: PMC3936780 DOI: 10.1186/1824-7288-40-20] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 02/12/2014] [Indexed: 01/06/2023] Open
Abstract
Background To date, only a few studies on child obesity concerned Trace Elements (TE). TE is involved in the pathogenesis of obesity and obesity related diseases. We tried to assess trace elements status [zinc (Zn), copper (Cu), selenium (Se), iron (Fe), and chromium (Cr)] in obese Egyptian children and their relationships with serum leptin and metabolic risk factors of obesity. Methods This was a case–control study performed with 80 obese children (BMI ≥ 95thcentile for age and gender) and 80 healthy non-obese children with comparable age and gender as the control group. For all subjects, serum Zn, Cu, Se, Fe, ferritin and Cr as well as biochemical parameters including lipid profile, serum glucose and homeostasis model assessment of insulin resistance (HOMA-IR) were assessed. Levels of serum leptin were measured by (enzyme-linked immunosorbent assay [ELISA] method), and serum insulin was measured by an electrochemiluminesce immunoassay. Results Compared to the control group, serum Zn, Se, and Fe levels were significantly lower (all P < 0.01) and serum Cu level was significantly higher (P < 0.01) in the obese children. Meanwhile, no significant differences were observed in serum ferritin or Cr levels (P > 0.05). A significant negative correlation was found between serum leptin and zinc levels in the obese children (r = −0.746; P < 0.01). Further, serum Zn showed significant negative correlations with total cholesterol TC levels (P < 0.05) and were positively correlated with high density lipoprotein- cholesterol HDL-C levels (P < 0.01) in the obese children. In addition, serum Se levels showed significant positive correlations with HOMA-IR values in the obese children (P < 0.01). Conclusion The obese children may be at a greater risk of developing imbalance (mainly deficiency) of trace elements which may be playing an important role in the pathogenesis of obesity and related metabolic risk factors.
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Affiliation(s)
- Seham F A Azab
- Faculty of Medicine, Zagazig University, 18 Omar Bin Elkhattab St, Al Qawmia, Zagazig City, Sharkia Governorate, Egypt.
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Numakawa T, Richards M, Nakajima S, Adachi N, Furuta M, Odaka H, Kunugi H. The role of brain-derived neurotrophic factor in comorbid depression: possible linkage with steroid hormones, cytokines, and nutrition. Front Psychiatry 2014; 5:136. [PMID: 25309465 PMCID: PMC4175905 DOI: 10.3389/fpsyt.2014.00136] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 09/12/2014] [Indexed: 01/09/2023] Open
Abstract
Increasing evidence demonstrates a connection between growth factor function (including brain-derived neurotrophic factor, BDNF), glucocorticoid levels (one of the steroid hormones), and the pathophysiology of depressive disorders. Because both BDNF and glucocorticoids regulate synaptic function in the central nervous system, their functional interaction is of major concern. Interestingly, alterations in levels of estrogen, another steroid hormone, may play a role in depressive-like behavior in postpartum females with fluctuations of BDNF-related molecules in the brain. BDNF and cytokines, which are protein regulators of inflammation, stimulate multiple intracellular signaling cascades involved in neuropsychiatric illness. Pro-inflammatory cytokines may increase vulnerability to depressive symptoms, such as the increased risk observed in patients with cancer and/or autoimmune diseases. In this review, we discuss the possible relationship between inflammation and depression, in addition to the cross-talk among cytokines, BDNF, and steroids. Further, since nutritional status has been shown to affect critical pathways involved in depression through both BDNF function and the monoamine system, we also review current evidence surrounding diet and supplementation (e.g., flavonoids) on BDNF-mediated brain functions.
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Affiliation(s)
- Tadahiro Numakawa
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience , Tokyo , Japan
| | - Misty Richards
- Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles , Los Angeles, CA , USA
| | - Shingo Nakajima
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience , Tokyo , Japan
| | - Naoki Adachi
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience , Tokyo , Japan
| | - Miyako Furuta
- Department of Physiology, St. Marianna University School of Medicine , Kanagawa , Japan
| | - Haruki Odaka
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience , Tokyo , Japan
| | - Hiroshi Kunugi
- Department of Mental Disorder Research, National Center of Neurology and Psychiatry, National Institute of Neuroscience , Tokyo , Japan
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Liu MJ, Bao S, Bolin ER, Burris DL, Xu X, Sun Q, Killilea DW, Shen Q, Ziouzenkova O, Belury MA, Failla ML, Knoell DL. Zinc deficiency augments leptin production and exacerbates macrophage infiltration into adipose tissue in mice fed a high-fat diet. J Nutr 2013; 143:1036-45. [PMID: 23700340 PMCID: PMC3681543 DOI: 10.3945/jn.113.175158] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Zinc (Zn) deficiency and obesity are global public health problems. Zn deficiency is associated with obesity and comorbid conditions that include insulin resistance and type 2 diabetes. However, the function of Zn in obesity remains unclear. Using a mouse model of combined high-fat and low-Zn intake (0.5-1.5 mg/kg), we investigated whether Zn deficiency exacerbates the extent of adiposity as well as perturbations in metabolic and immune function. C57BL/6 mice were randomly assigned to receive either a high-fat diet (HFD) or a control (C) diet for 6 wk, followed by further subdivision into 2 additional groups fed Zn-deficient diets (C-Zn, HFD-Zn), along with a C diet and an HFD, for 3 wk (n = 8-9 mice/group). The extent of visceral fat, insulin resistance, or systemic inflammation was unaffected by Zn deficiency. Strikingly, Zn deficiency significantly augmented circulating leptin concentrations (HFD-Zn vs. HFD: 3.15 ± 0.16 vs. 2.59 ± 0.12 μg/L, respectively) and leptin signaling in the liver of obese mice. Furthermore, gene expression of macrophage-specific markers ADAM8 (A disintegrin and metalloproteinase domain-containing protein 8) and CD68 (cluster of differentiation 68) was significantly greater in adipose tissue in the HFD-Zn group than in the HFD group, as confirmed by CD68 protein analysis, indicative of increased macrophage infiltration. Inspection of Zn content and mRNA profiles of all Zn transporters in the adipose tissue revealed alterations of Zn metabolism to obesity and Zn deficiency. Our results demonstrate that Zn deficiency increases leptin production and exacerbates macrophage infiltration into adipose tissue in obese mice, indicating the importance of Zn in metabolic and immune dysregulation in obesity.
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Affiliation(s)
- Ming-Jie Liu
- Dorothy M. Davis Heart and Lung Research Institute
| | | | | | | | - Xiaohua Xu
- Division of Environmental Health Sciences, College of Public Health
| | - Qinghua Sun
- Division of Environmental Health Sciences, College of Public Health
| | - David W. Killilea
- Nutrition and Metabolism Center, Children's Hospital Oakland Research Institute, Oakland, CA
| | - Qiwen Shen
- Department of Human Nutrition, College of Education and Human Ecology; and
| | | | - Martha A. Belury
- Department of Human Nutrition, College of Education and Human Ecology; and
| | - Mark L. Failla
- Department of Human Nutrition, College of Education and Human Ecology; and
| | - Daren L. Knoell
- Dorothy M. Davis Heart and Lung Research Institute,Department of Pharmacy, The Ohio State University, Columbus, OH; and,To whom correspondence should be addressed. E-mail:
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Bordalo LA, Teixeira TFS, Bressan J, Mourão DM. [Bariatric surgery: how and why to supplement]. Rev Assoc Med Bras (1992) 2013; 57:113-20. [PMID: 21390468 DOI: 10.1590/s0104-42302011000100025] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Accepted: 10/12/2010] [Indexed: 01/01/2023] Open
Abstract
Patients who have undergone bariatric surgery are at increased risk of developing nutritional deficiencies from limited food intake and absorption of different nutrients. A systematic review of several database websites (PubMed and ISI Web of Science) was conducted from September 1983 to April 2010 to identify literature related to micronutrient deficiencies occurring after bariatric surgery. Keywords used individually or in various combinations in the search were bariatric surgery, obesity, vitamin/mineral deficiencies, protein deficiency, nutrient absorption and nutrient supplementation. Literature suggests that to prevent or treat nutritional deficiencies resulting from anatomical changes due to surgical techniques nutritional supplementation is usually necessary. The success of oral nutritional supplementation to correct or prevent nutritional deficiencies depends on several factors. Thus, to understand how nutrients can be administered is very important for clinical practice. This review aims to provide help for the best selection of nutrients to ensure an adequate replacement of nutrients in patients who have undergone bariatric surgery.
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Abstract
Leptin is synthesized and released by the adipose tissue. Leptin, which carries the information about energy reserves of the body to the brain, controls food intake by acting on neuropeptide Y (NPY), which exercises a food-intake-increasing effect through relevant receptors in the hypothalamus. Zinc deficiency is claimed to result in anorexia, weight loss, poor food efficiency, and growth impairment. The fact that obese individuals have low zinc and high leptin levels suggests that there is a relation between zinc and nutrition, and consequently also between zinc and leptin. Leptin deficiency increases the predisposition to infections and this increase is associated with the impairments in the production of cytokines. Zinc has a key role in the sustenance of immune resistance against infections. Dietary zinc deficiency negatively affects CD(+) 4 cells, Th functions, and consequently, cell-mediated immunity by causing a decrease in the production of IL-2, IF-γ, and TNF-α, which are Th1 products. The relation between zinc and the concerned cytokines in particular, and the fact that leptin has a part in the immune responses mediated by these cytokines demonstrate that an interaction among cellular immunity, leptin and zinc is inevitable. An overall evaluation of the information presented above suggests that there are complex relations among food intake, leptin and zinc on one hand and among cellular immunity, leptin and zinc on the other. The aim of the present review was to draw attention to the possible relation between zinc and leptin in dietary regulation and cellular immunity.
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Affiliation(s)
| | - Rasim Mogulkoc
- Department of Physiology, Selcuklu Medical School, Selcuk University, Konya, Turkey
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Lobo JC, Aranha LN, Moraes C, Brito LC, Mafra D. Linking zinc and leptin in chronic kidney disease: future directions. Biol Trace Elem Res 2012; 146:1-5. [PMID: 21947794 DOI: 10.1007/s12011-011-9211-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Accepted: 09/12/2011] [Indexed: 02/05/2023]
Abstract
Anorexia is a common complication in patients with chronic kidney disease (CKD) and is associated with the development of malnutrition and an increased risk of mortality. Several compounds are linked to anorexia in these patients; however, the mechanisms are unknown. Zinc (Zn) deficiency is associated with decreased food intake and has been observed in CKD patients. In addition, leptin is an anorexigenic peptide, and patients with CKD present generally high levels of this hormone. Studies have suggested an association between Zn and leptin status in human and rats; however, the results are inconsistent. Some claimed that Zn supplementation does not change leptin release or that there is no significant relationship between Zn and leptin. Others have reported that Zn might be a mediator of leptin production. CKD patients have hyperleptinemia and hypozincemia, but the relationship between Zn deficiency and leptin levels in CKD patients has been poorly understood until now. The aim of this review is to integrate knowledge on leptin and Zn actions to provide a cohesive clinical perspective regarding their interactions in CKD patients.
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Affiliation(s)
- Julie Calixto Lobo
- Federal University of Rio de Janeiro, Institute of Biophysic Carlos Chagas Filho, Health Science Centre, Rio de Janeiro, Brazil
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Rosado JL, Garcia OP, Ronquillo D, Hervert-Hernández D, Caamaño MDC, Martínez G, Gutiérrez J, García S. Intake of Milk with Added Micronutrients Increases the Effectiveness of an Energy-Restricted Diet to Reduce Body Weight: A Randomized Controlled Clinical Trial in Mexican Women. ACTA ACUST UNITED AC 2011; 111:1507-16. [DOI: 10.1016/j.jada.2011.07.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2010] [Accepted: 05/09/2011] [Indexed: 12/24/2022]
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Voruganti VS, Cai G, Klohe DM, Jordan KC, Lane MA, Freeland-Graves JH. Short-term weight loss in overweight/obese low-income women improves plasma zinc and metabolic syndrome risk factors. J Trace Elem Med Biol 2010; 24:271-6. [PMID: 20692822 DOI: 10.1016/j.jtemb.2010.05.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Revised: 04/13/2010] [Accepted: 05/19/2010] [Indexed: 11/30/2022]
Abstract
Metabolic syndrome is a group of disorders involving obesity, insulin resistance, dyslipidemia and hypertension. Obesity is the most crucial risk factor of metabolic syndrome, because it is known to precede other risk factors. Obesity is also associated with disturbances in the metabolism of the trace mineral, zinc. The overall purpose of this study was to investigate the effects of short-term weight loss on plasma zinc and metabolic syndrome risk factors. An 8-week weight loss intervention study was conducted with 90 low-income overweight/obese mothers, whose youngest child was 1-3 years old. Plasma levels of zinc, glucose, insulin, leptin, triglycerides, total, high-density lipoprotein (HDL) and low-density lipoprotein (LDL) cholesterol were measured and compared at weeks 0 and 8 of the weight loss program. At pre-study, plasma zinc was low in 39% and, within normal values in 46%, of obese/overweight mothers. By the end of intervention, plasma zinc rose by 22% and only 5% of the mothers continued to exhibit low plasma zinc. At post-study, the metabolic syndrome risk factors of waist circumference, HDL cholesterol, and diastolic blood pressure (p<0.05) showed significant improvements. Plasma zinc increased by a greater margin (67%) in women with low zinc, as compared to those with normal zinc (18%); weight reduction was similar in both the groups. Finally, changes in % body fat were related negatively with changes in plasma zinc (r=- 0.28, p<0.05). The circulating levels of zinc, as well as the metabolic syndrome components, showed significant improvements in overweight/obese low-income women after weight loss.
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Affiliation(s)
- Venkata Saroja Voruganti
- Department of Genetics, Southwest Foundation for Biomedical Research, San Antonio, TX 78227, USA.
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Abstract
Micronutrient deficiencies have been found in obese individuals across age groups worldwide. While the effects of micronutrient deficiencies on human functions have been studied widely in different populations, there is limited information on how these micronutrient deficiencies affect obese populations. An examination of the available literature suggests associations exist between micronutrient deficiencies and obesity in different populations. These associations and possible mechanisms of the deficiencies' metabolic effects, such as their influence on leptin and insulin metabolism, are discussed here. Further studies are needed to clarify the roles of the different micronutrient deficiencies with respect to obesity and its comorbid conditions.
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Affiliation(s)
- Olga P García
- School of Natural Sciences, Universidad Autónoma de Querétaro, Juriquilla, Mexico.
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Song MK, Rosenthal MJ, Song AM, Uyemura K, Yang H, Ament ME, Yamaguchi DT, Cornford EM. Body weight reduction in rats by oral treatment with zinc plus cyclo-(His-Pro). Br J Pharmacol 2009; 158:442-50. [PMID: 19422374 DOI: 10.1111/j.1476-5381.2009.00201.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND AND PURPOSE We have previously shown that treatment with zinc plus cyclo-(His-Pro) (CHP) significantly stimulated synthesis of the insulin degrading enzyme and lowered plasma insulin and blood glucose levels, alongside improving oral glucose tolerance in genetically type 2 diabetic Goto-Kakizaki (G-K) rats and in aged obese Sprague-Dawley (S-D) rats. Thus, we postulated that zinc plus CHP (ZC) treatment might also improve body weight control in these rats. We therefore determined the effects of ZC treatment on body weights in both genetically diabetic, mature G-K rats and non-diabetic, obese S-D rats. EXPERIMENTAL APPROACH G-K rats aged 1.5-10 months and non-diabetic overweight or obese S-D rats aged 6-18 months were treated with 0-6 mg CHP plus 0-10 mg zinc L(-1) drinking water for 2-4 weeks, and changes in weight, serum leptin and adiponectin levels, food and water intakes were measured. KEY RESULTS The optimal dose of CHP (in combination with zinc) to reduce weight and plasma leptin levels and to increase plasma adiponectin levels was close to 0.1 mg kg(-1) day(-1), in either mature G-K rats and aged overweight or obese S-D rats. Food and water intake significantly decreased in ZC treated rats in both aged S-D rats and mature G-K rats, but not in young S-D and G-K rats. CONCLUSIONS AND IMPLICATIONS ZC treatment improved weight control and may be a possible treatment for overweight and obesity.
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Affiliation(s)
- M K Song
- Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
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Arikan S, Akkus H, Halifeoglu I, Baltaci AK. Comparison of plasma leptin and zinc levels in elite athletes and sedentary people. Cell Biochem Funct 2008; 26:655-8. [DOI: 10.1002/cbf.1480] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Taneja SK, Mandal R. Assessment of minerals in obesity-related diseases in the Chandigarh (India) population. Biol Trace Elem Res 2008; 121:106-23. [PMID: 17952386 DOI: 10.1007/s12011-007-8035-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2007] [Revised: 08/30/2007] [Accepted: 10/01/2007] [Indexed: 10/22/2022]
Abstract
Excessive Zn but normal Cu and Mg in the staple food consumed by the people of Chandigarh (Union territory and capital of Punjab and Haryana States of India) has been considered to be the major risk factor for the prevalence of obesity (33.15%) and obesity-related diseases in this region. Therefore, in the present investigations, in obesity-related diseases, the status of these minerals was estimated in their tissues, including hair, nails, and blood serum and urine, and compared with those of normal subjects. They were grouped as: normal subjects in control Group A, middle-aged diabetics in Group D(M), older diabetics in Group D(O), and diabetics with osteoarthritis in Group D+ OA, osteoarthritis in Group OA and rheumatoid arthritis in Group RA, respectively. The results evaluated in the order as: hair Zn, group D+OA>D(M)>OA>A (control)>RA>D(O) (p < 0.001); hair Cu, group A (control)>D(M)>OA>D+OA>D(O)>RA (p < 0.001); hair Mg, group A (control)>D(M)>OA>D+OA>RA>D(O) (p < 0.001, 0.01); hair Mn, group A (control)>RA>OA>D-OA>D(M)>D(O) (p < 0.001); nail Zn, group D(M)>D+OA>OA>A (control)>RA>D(O) (p < 0.001, 0.05); nail Cu, group A (control)>OA>D(M)>D+OA>RA>D(O) (p < 0.001); nail Mg, group A (control)>OA>D(M)>D(O)>D+OA >RA (p < 0.001); nail Mn, group A (control) >RA>OA>D+OA>D(M)>D(O) (p < 0.01); urine Zn, group D(O)>D(M)>D+OA>A (control)>RA>OA (p < 0.01); urine Cu, group RA>D+OA>D(O)>OA> D(M)>A (control) (p<0.001); urine Mg, group RA>OA>D+OA>D(O)>D(M)>A (control; p < 0.001); urine Mn, group D(O)>D(M)>OA>D+OA>RA>A (control; p < 0.001), respectively. The analysis of the mineral status in serum of diabetics further showed their highly significant rise from lower mean age subgroup to higher mean age subgroup than their control counter parts (p < 0.001, 0.01, and 0.05) with coincident deficiencies of Cu, Mg, and Mn in their tissues. This study would be helpful considering the status of minerals in these obesity-related diseases depending on the choice of the food consumed to improve the quality of life and prognosis for the diseases.
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Baltaci AK, Mogulkoc R. Pinealectomy and melatonin administration in rats: their effects on plasma leptin levels and relationship with zinc. ACTA BIOLOGICA HUNGARICA 2007; 58:335-43. [PMID: 18277460 DOI: 10.1556/abiol.58.2007.4.1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The aim of this study was to examine effects of pinealectomy and melatonin administration plasma leptin levels and its relationship with zinc in rats. The study was conducted on 40 adult male Sprague-Dawley rats. They were divided into four groups each containing 10 animals. Group 1 served as control. Group 2 was pinealectomized group. Animals in Group 3 were pinealectomized and injected with melatonin (3 mg/kg/day, ip). Group 4 received melatonin alone (3 mg/kg/day, ip). At the end of the experiments, all animals were decapitated and trunk blood collected. Plasma leptin and zinc levels were determined by radioimmunoassay and Atomic Absorption Spectrophotometer methods, respectively. Although mean weights of the animals at the beginning were not significantly different among the groups, the mean weight of the pinealectomized group was found to be significantly lower than all other groups at the end of a six-month period (p < 0.01). Plasma leptin and zinc levels were the highest in melatonin-administered group (group 4; p < 0.01). The lowest plasma leptin and zinc levels were obtained in the pinealectomized group (group 2; p < 0.01). Changes in these two parameters were not statistically significant in groups 1 and 3. Our findings indicate that pinealectomy results in a decrease in leptin and zinc levels in rats, and that melatonin administration to pinealectomized rats prevents the decrease in the these parameters. In addition, long-term administration of melatonin to rats leads to an increase in both leptin and zinc concentrations.
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Affiliation(s)
- A K Baltaci
- Department of Physiology, Meram Medical School, Selcuk University, Konya, Turkey.
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Kwun IS, Cho YE, Lomeda RAR, Kwon ST, Kim Y, Beattie JH. Marginal zinc deficiency in rats decreases leptin expression independently of food intake and corticotrophin-releasing hormone in relation to food intake. Br J Nutr 2007; 98:485-9. [PMID: 17475084 DOI: 10.1017/s0007114507730763] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Zn deficiency reduces food intake and growth rate in rodents. To determine the relationship between Zn deficiency and the regulation of food intake, we evaluated leptin gene expression in epididymal white adipose tissue (eWAT), and hypothalamic corticotropin-releasing hormone (hCRH) and hypothalamic neuropeptide Y (hNPY) of rats Zn-deficient only to show reduced food intake and growth rate but not food intake cycling. Growing male Sprague-Dawley rats (240 g) were randomly assigned to one of four dietary groups: Zn-adequate (ZA; 30 mg/kg diet), Zn-deficient (ZD; 3 mg/kg diet), pair-fed with ZD (PF; 30 mg/kg diet) and Zn-sufficient (ZS; 50 mg/kg diet) (n 8), and were fed for 3 weeks. Food intake and body weight were measured, as were blood mononuclear cells and pancreas Zn levels. eWAT leptin, hCRH and hNPY mRNA levels were determined. Food intake was decreased by about 10 % in ZD and PF rats compared to ZA and ZS rats. Growth and eWAT leptin mRNA levels were unaffected in PF rats but were significantly (P < 0·05) decreased in ZD rats. However, hNPY showed a tendency to increase, and hCRH significantly (P < 0·05) decreased, in both ZD and PF rats. These results suggest that while leptin gene expression may be directly affected by Zn, hNPY and hCRH are likely responding to reduced food intake caused by Zn deficiency.
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Affiliation(s)
- In-Sook Kwun
- Department of Food Science and Nutrition, Andong National University, Andong, Kyungpook, 760-749, South Korea.
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. OA, . AF. Effect of Dietary Zinc Sulphate Supplementation on Salt Induced Hypertension in Rats. INT J PHARMACOL 2006. [DOI: 10.3923/ijp.2006.485.491] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Baltaci AK, Mogulkoc R, Ozturk A. Testosterone and zinc supplementation in castrated rats: Effects on plasma leptin levels and relation with LH, FSH and testosterone. Life Sci 2005; 78:746-52. [PMID: 16150461 DOI: 10.1016/j.lfs.2005.05.098] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2005] [Accepted: 05/16/2005] [Indexed: 11/24/2022]
Abstract
The present study aims to examine how zinc and testosterone supplementation, in combination and separately, affect plasma LH, FSH and leptin levels in castrated rats. Eighty experimental animals used in the study were allocated to 8 groups, each containing an equal number of rats. Group 1, control group; Group 2, castration group; Group 3, testosterone group (5 mg/kg/day); Group 4, zinc-supplemented group (3 mg/kg/day); Group 5, testosterone and zinc-supplemented group; Group 6, zinc-supplemented castration group; Group 7, testosterone and castration group; and Group 8, zinc-supplemented, testosterone and castration group. Plasma zinc, leptin, LH, FSH and free and total testosterone levels were determined in the blood samples collected from the animals by decapitation. Group 2 had the highest leptin levels and together with group 6, it also showed the highest LH and FSH levels (p<0.01). The lowest leptin levels were observed in groups 3 and 7 (p<0.01). Leptin levels in groups 4 and 6 were higher than those in groups 1, 5 and 8 (p<0.01). LH levels in group 4 were lower than those in groups 2 and 6 and higher than those in all other groups (p<0.01). Free and total testosterone levels in groups 7 and 8 were lower than those in groups 3 and 5, but higher than those in all other groups (p<0.01). Plasma LH levels may be more effective than testosterone on plasma leptin and zinc may be an important mediator of the effect LH has on leptin.
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Hwang IK, Go VLW, Harris DM, Yip I, Song MK. Effects of arachidonic acid plus zinc on glucose disposal in genetically diabetic (ob/ob) mice. Diabetes Obes Metab 2002; 4:124-31. [PMID: 11940110 DOI: 10.1046/j.1463-1326.2002.00195.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIM The present study is designed to determine whether arachidonic acid (AA) plus zinc improves clinical signs of diabetes in genetically diabetic ob/ob mice. METHODS In the first study, effects of acute administration of AA plus zinc on glucose disposal were determined in ob/ob and lean mice (n = 6 each). In the second study, ob/ob and lean mice were treated with increasing doses of AA plus zinc for 2 weeks (n = 5 each). Postprandial and fasting blood glucose concentrations, three-hour-area-average above fasting glucose concentration (TAFGC), water and food intake, body weight and plasma insulin concentrations were measured. RESULTS Acute administration of AA plus zinc significantly increased glucose disposal in ob/ob mice. In the second study, postprandial and fasting blood glucose concentrations, TAFGC, and water and food intake in ob/ob mice treated with AA plus zinc for 2 weeks were significantly decreased compared with those in mice given no AA. Plasma insulin concentrations in both lean and ob/ob mice were not changed by AA treatment in drinking water. CONCLUSIONS AA plus zinc in drinking water is effective in decreasing blood glucose levels in obese mice. These results indicate that use of these compounds should be considered as a dietary supplement to control hyperglycaemia in patients with type II diabetes.
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Affiliation(s)
- I K Hwang
- UCLA Center for Human Nutrition, UCLA School of Medicine, Los Angeles, CA 90095-1742, USA
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Chen MD, Yang VC, Alexander PS, Lin PY, Song YM. Effects of selected minerals on leptin secretion in streptozotocin-induced hyperglycemic mice. Exp Biol Med (Maywood) 2001; 226:836-40. [PMID: 11568306 DOI: 10.1177/153537020122600905] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The effects of lithium, magnesium, vanadate, and zinc on leptinemia and leptin secretion by adipose tissue were investigated in streptozotocin- (STZ) induced hyperglycemic mice. After the administration of studied minerals in drinking water for 4 weeks, fasting serum leptin concentrations were elevated, accompanied by normoglycemia in STZ-injected mice, regardless which mineral was provided (P < 0.05). However, the in vitro administration of lithium, magnesium, and vanadate did not significantly influence the leptin secretion of adipose tissue. A low zinc treatment (0.1 mM) augmented, whereas both a pharmacological treatment of zinc (1 mM) and zinc depletion (1 mM TPEN) attenuated, leptin secretion (P < 0.05). The present study shows that STZ-induced hyperglycemic mice have hypoleptinemia and reduced leptin secretion by adipose tissue. Moreover, these defects can be improved by a moderate zinc administration.
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Affiliation(s)
- M D Chen
- Department of Medical Laboratories, Taichung Veterans General Hospital, 160 Taichung-Kang Road, Section 3, Taichung 40705, Taiwan
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