1
|
Weingarten MFJ, Scholz M, Wohland T, Horn K, Stumvoll M, Kovacs P, Tönjes A. Circulating Oxytocin Is Genetically Determined and Associated With Obesity and Impaired Glucose Tolerance. J Clin Endocrinol Metab 2019; 104:5621-5632. [PMID: 31361301 DOI: 10.1210/jc.2019-00643] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Accepted: 07/22/2019] [Indexed: 01/01/2023]
Abstract
CONTEXT Despite the emerging evidence on the role of oxytocin (OXT) in metabolic diseases, there is a lack of well-powered studies addressing the relationship of circulating OXT with obesity and diabetes. OBJECTIVES AND DESIGN Here, we measured OXT in a study cohort (n = 721; 396 women, 325 men; mean age ± SD, 47.7 ± 15.2 years) with subphenotypes related to obesity, including anthropometric traits such as body mass index [BMI (mean ± SD), 26.8 ± 4.6 kg/m2], waist-to-hip ratio (WHR; 0.88 ± 0.09), blood parameters (glucose, 5.32 ± 0.50 mmol/L; insulin, 5.3 ± 3.3 µU/mL), and oral glucose tolerance test to clarify the association with OXT. We also tested in a genome-wide association study (GWAS) whether the interindividual variation in OXT serum levels might be explained by genetic variation. RESULTS The OXT concentration was increased in subjects with elevated BMI and positively correlated with WHR, waist circumference, and triglyceride levels. The OXT concentration in subjects with BMI <25 kg/m2 was significantly lower (n = 256; 78.6 pg/mL) than in subjects with a BMI between 25 and 30 kg/m2 (n = 314; 98.5 pg/mL, P = 6 × 10-6) and with BMI >30 kg/m2 (n = 137; 106.4 pg/mL, P = 8 × 10-6). OXT levels were also positively correlated with plasma glucose and insulin and were elevated in subjects with impaired glucose tolerance (P = 4.6 × 10-3). Heritability of OXT was estimated at 12.8%. In a GWAS, two hits in linkage disequilibrium close (19 kb) to the OXT reached genome-wide significant association (top-hit rs12625893, P = 3.1 × 10-8, explained variance 3%). CONCLUSIONS Our data show that OXT is genetically affected by a variant near OXT and is associated with obesity and impaired glucose tolerance.
Collapse
Affiliation(s)
| | - Markus Scholz
- Institute for Medical Informatics, Statistics, and Epidemiology, University of Leipzig, Leipzig, Germany
- LIFE Research Center, University of Leipzig, Leipzig, Germany
| | - Tobias Wohland
- IFB Adiposity Diseases, University of Leipzig Medical Center, Leipzig, Germany
| | - Katrin Horn
- Institute for Medical Informatics, Statistics, and Epidemiology, University of Leipzig, Leipzig, Germany
- LIFE Research Center, University of Leipzig, Leipzig, Germany
| | - Michael Stumvoll
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany
| | - Peter Kovacs
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany
- IFB Adiposity Diseases, University of Leipzig Medical Center, Leipzig, Germany
| | - Anke Tönjes
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, Leipzig, Germany
| |
Collapse
|
2
|
Chang HH, Chang WH, Chi MH, Peng YC, Huang CC, Yang YK, Chen PS. The OXTR Polymorphism Stratified the Correlation of Oxytocin and Glucose Homeostasis in Non-Diabetic Subjects. Diabetes Metab Syndr Obes 2019; 12:2707-2713. [PMID: 31908511 PMCID: PMC6927562 DOI: 10.2147/dmso.s226245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 11/19/2019] [Indexed: 01/10/2023] Open
Abstract
OBJECTIVE Previous animal studies have shown that the oxytocin system might affect glucose homeostasis through the hypothalamus-pituitary-adrenal (HPA) axis and peripheral organs. Moreover, whether the effect is stratified by the polymorphism of oxytocin receptor gene (OXTR) remains unclear. METHODS In this study, we recruited 89 non-diabetic participants. Their plasma oxytocin and serum insulin profiles were obtained, and the polymorphism of OXTR rs53576 was genotyped. RESULTS There were significant correlations between the oxytocin level and fasting glucose level (r = -0.29, P <0.01), insulin level (r = -0.26, P = 0.01), and homeostasis model assessment-estimated insulin resistance (HOMA-IR) (r = -0.25, P = 0.01), when adjusted for age, gender, and body mass index (BMI). When further considering the stratification effects of OXTR variation, we found that the oxytocin level was significantly correlated with the fasting glucose level (r = -0.25, P = 0.04), insulin level (r = -0.35, P = 0.03), and HOMA-IR (r = -0.35, P < 0.01) in subjects with the OXTR A allele (n = 75) after adjustment for age, gender, and BMI. In addition, the oxytocin level in those with the GG genotype of OXTR was significantly negatively correlated with the leptin level (n = 14, r = -0.66, P = 0.02). CONCLUSION The results demonstrated that the polymorphism of OXTR plays an important role in individual differences in the correlation of oxytocin and glucose homeostasis in non-diabetic subjects.
Collapse
Affiliation(s)
- Hui Hua Chang
- Institute of Clinical Pharmacy and Pharmaceutical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- School of Pharmacy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Pharmacy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Pharmacy, National Cheng Kung University Hospital, Dou-Liou Branch, Yunlin, Taiwan
| | - Wei Hung Chang
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Mei Hung Chi
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yi Chin Peng
- Institute of Clinical Pharmacy and Pharmaceutical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chih-Chun Huang
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yen Kuang Yang
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Behavioral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Psychiatry, National Cheng Kung University Hospital, Dou-Liou Branch, Yunlin, Taiwan
| | - Po See Chen
- Department of Psychiatry, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Behavioral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Correspondence: Po See Chen Department of Psychiatry, National Cheng Kung University Hospital, 138 Sheng Li Road, North District, Tainan70403, TaiwanTel +886-6-2353535 ext. 5189Fax +886-6-2759259 Email
| |
Collapse
|
3
|
Roh S, Kimura N, Sakamoto K, Nishihara K, Suzuki K, Katoh K. Effects of butyrate supplementation in antibiotic-free milk replacer and starter on growth performance in suckling calves. Anim Sci J 2018; 89:1486-1491. [DOI: 10.1111/asj.13096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 05/30/2018] [Accepted: 06/24/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Sanggun Roh
- Laboratory of Animal Physiology; Graduate School of Agricultural Science; Tohoku University; Sendai Miyagi Japan
- Laboratory of Function and Development Science of Livestock Production; Graduate School of Agricultural Science; Tohoku University; Sendai Miyagi Japan
| | - Nobuhiro Kimura
- Kimura Animal Professional Engineers Office; Midori Saitama Japan
- Nippon Veterinary and Life Science University; Musashino Tokyo Japan
| | | | - Koki Nishihara
- Laboratory of Animal Physiology; Graduate School of Agricultural Science; Tohoku University; Sendai Miyagi Japan
| | - Keiichi Suzuki
- Laboratory of Function and Development Science of Livestock Production; Graduate School of Agricultural Science; Tohoku University; Sendai Miyagi Japan
| | - Kazuo Katoh
- Laboratory of Animal Physiology; Graduate School of Agricultural Science; Tohoku University; Sendai Miyagi Japan
- Laboratory of Function and Development Science of Livestock Production; Graduate School of Agricultural Science; Tohoku University; Sendai Miyagi Japan
| |
Collapse
|
4
|
Nishihara K, Kobayashi R, Suzuki Y, Sato K, Katoh K, Roh S. Post-prandial decrease in plasma growth hormone levels is not related to the increase in plasma insulin levels in goats. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2017; 30:1696-1701. [PMID: 28728377 PMCID: PMC5666172 DOI: 10.5713/ajas.16.0965] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 04/11/2017] [Accepted: 05/27/2017] [Indexed: 12/11/2022]
Abstract
Objective In the present study, we examined whether the post-prandial reduction in plasma growth hormone (GH) levels is related to the increase in plasma insulin levels in ruminants. Methods We performed two experiments: intravenous bolus injection of insulin (0.2 IU/kg body weight) or glucose (1.0 mmol/kg body weight) was administered to increase the plasma insulin levels in male Shiba goats. Results In the insulin injection experiment, significant (p<0.05) increase in GH concentrations was observed, 15 to 20 min after the injection; it was accompanied with a significant (p<0.01) increase in cortisol concentrations at 45 to 90 min, when compared to the concentrations in the saline-injected controls. The glucose injection significantly (p<0.05) increased the plasma GH concentration at 20 to 45 min; this was not accompanied by significantly higher cortisol concentrations than were observed for the saline-injected control. Hypoglycemia induced by the insulin injection, which causes the excitation of the adrenal cortex, might be involved in the increase in insulin levels. Conclusion Based on these results, we conclude that post-prandial increases in plasma insulin or glucose levels do not induce a decrease in GH concentration after feeding in the ruminants.
Collapse
Affiliation(s)
- Koki Nishihara
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai 980-0845, Japan
| | - Ryoko Kobayashi
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai 980-0845, Japan
| | - Yutaka Suzuki
- Graduate School of Agriculture, Hokkaido University, Sapporo, Hokkaido 060-8589, Japan
| | - Katsuyoshi Sato
- Department of Agribusiness, Faculty of Bioresource Scienes, Akita Prefectural University, Akita 010-0195, Japan
| | - Kazuo Katoh
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai 980-0845, Japan
| | - Sanggun Roh
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai 980-0845, Japan
| |
Collapse
|
5
|
Szulc P, Amri EZ, Varennes A, Panaia-Ferrari P, Fontas E, Goudable J, Chapurlat R, Breuil V. High serum oxytocin is associated with metabolic syndrome in older men - The MINOS study. Diabetes Res Clin Pract 2016; 122:17-27. [PMID: 27764720 DOI: 10.1016/j.diabres.2016.09.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 09/05/2016] [Accepted: 09/22/2016] [Indexed: 02/06/2023]
Abstract
AIM Oxytocin regulates food intake, carbohydrate and lipid metabolism, and urinary sodium excretion. We assessed the association between serum oxytocin levels and presence of metabolic syndrome (MetS) in older men. METHODS Cross-sectional study was performed in 540 volunteer men aged 50-85yrs from the MINOS cohort. Oxytocin was measured in fasting serum by radioimmunoassay (Oxytocin RIA, Phoenix Pharmaceuticals). MetS was diagnosed using the harmonized definition. RESULTS Serum oxytocin was higher in 166 men with MetS vs. controls (p<0.005). After adjustment for confounders including leptin, higher oxytocin was associated with higher odds of MetS (OR=1.38 per SD, 95%CI: 1.10-1.71, p<0.005). Men with serum oxytocin >0.74pg/mL (median) had higher odds of MetS vs. men with oxytocin ⩽0.74pg/mL (OR=2.06, 95%CI: 1.33-3.18, p<0.005). Higher oxytocin levels and low testosterone levels (total or free) were significantly associated with higher odds of MetS jointly and independently of each other. Men having oxytocin >0.74pg/mL and total testosterone <300ng/dL (<10.4nmol/L) had higher odds of MetS vs. men without these characteristics (OR=3.95, 95%CI: 1.65-9.46, p<0.005). Men having 25-hydroxycholecalciferol levels <30ng/mL and oxytocin >0.74pg/mL had higher odds of MetS vs. men without these characteristics (OR=2.86, 95%CI: 1.47-5.58, p<0.01). Men having oxytocin >0.74pg/mL and osteocalcin levels <14.6ng/mL (lowest quartile) had higher odds of MetS vs. men without these characteristics (OR=4.12, 95%CI: 2.07-8.20, p<0.001). CONCLUSION In older men, higher serum oxytocin levels are associated with higher odds of MetS regardless of potential confounders.
Collapse
Affiliation(s)
- Pawel Szulc
- INSERM UMR 1033, University of Lyon, Hospices Civils de Lyon, Lyon, France.
| | - Ez Zoubir Amri
- CNRS, iBV UMR 7277, Université Nice Sophia Antipolis, Parc Valrose Nice, France; INSERM, iBV, U1091, Nice, France
| | - Annie Varennes
- Department of Biochemistry and Molecular Biology, Laboratory of Medical Biology, Hospices Civils de Lyon, Lyon, France
| | | | - Eric Fontas
- Nice University Hospital, Cimiez Hospital, Department of Clinical Research, Nice, France
| | - Joëlle Goudable
- Dept. of Public Health, University of Lyon, Hospices Civils de Lyon, Lyon, France
| | - Roland Chapurlat
- INSERM UMR 1033, University of Lyon, Hospices Civils de Lyon, Lyon, France
| | - Véronique Breuil
- Nice University Hospital, Pasteur Hospital, Department of Rheumatology, Nice, France; UMR E-4320 MATOs CEA/iBEB/SBTN, Université Nice Sophia Antipolis, Faculté de Médecine, Nice, France
| |
Collapse
|
6
|
Abstract
Despite widespread reports that intranasal application of oxytocin has a variety of behavioral effects, very little of the huge amounts applied intranasally appears to reach the cerebrospinal fluid. However, peripheral concentrations are increased to supraphysiologic levels, with likely effects on diverse targets including the gastrointestinal tract, heart, and reproductive tract. The wish to believe in the effectiveness of intranasal oxytocin appears to be widespread and needs to be guarded against with scepticism and rigor. Preregistering trials, declaring primary and secondary outcomes in advance, specifying the statistical methods to be applied, and making all data openly available should minimize problems of publication bias and questionable post hoc analyses. Effects of intranasal oxytocin also need proper dose-response studies, and such studies need to include control subjects for peripheral effects, by administering oxytocin peripherally and by blocking peripheral actions with antagonists. Reports in the literature of oxytocin measurements include many that have been made with discredited methodology. Claims that peripheral measurements of oxytocin reflect central release are questionable at best.
Collapse
|