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Ke X, Duan L, Gong F, Zhang Y, Deng K, Yao Y, Wang L, Feng F, Xing B, Pan H, Zhu H. A study on serum pro-neurotensin (PNT), furin, and zinc alpha-2-glycoprotein (ZAG) levels in patients with acromegaly. J Endocrinol Invest 2022; 45:1945-1954. [PMID: 35670958 DOI: 10.1007/s40618-022-01827-1] [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: 02/03/2022] [Accepted: 05/18/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE Acromegaly caused by growth hormone cell adenoma is commonly associated with abnormal glucolipid metabolism, which may result from changes in adipocytokine secretion. This study aims to investigate serum adipokine levels, including pro-neurotensin (PNT), furin, and zinc alpha-2-glycoprotein (ZAG), in acromegalic patients and the correlation between the levels of these three adipokines and GH levels and glucolipid metabolism indices. METHODS Sixty-eight acromegalic patients and 121 controls were included, and their clinical data were recorded from electronic medical record system. Serum PNT, furin and ZAG levels were measured by ELISA. RESULTS Serum PNT levels in acromegalic patients were significantly higher than controls (66.60 ± 12.36 vs. 46.68 ± 20.54 pg/ml, P < 0.001), and acromegaly was an independent influencing factor of PNT levels (P < 0.001). Moreover, subjects with the highest tertile of PNT levels had a close correlation with acromegaly (OR = 22.200, 95% CI 7.156 ~ 68.875, P < 0.001), even in Model 1 adjusted for gender and age and Model 2 adjusted for gender, age and BMI. Additionally, serum PNT levels were positively correlated with BMI (r = 0.220, P = 0.002) and triglycerides (TGs, r = 0.295, P < 0.001), and TGs were an independent influencing factor of serum PNT levels in acromegalic subjects (P < 0.001). Furthermore, serum PNT levels in obese acromegalic patients were significantly higher than those with normal BMI (P < 0.05). However, serum furin levels were lower in acromegalic patients than controls (0.184 ± 0.036 vs. 0.204 ± 0.061 ng/ml, P < 0.001). CONCLUSION This study is the first to demonstrate that acromegalic patients have increased serum PNT levels. Moreover, serum PNT plays a potential role in abnormal lipid metabolism of acromegalic patients.
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Affiliation(s)
- X Ke
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - L Duan
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - F Gong
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - Y Zhang
- Central Research Laboratory, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - K Deng
- Department of Neurosurgery, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - Y Yao
- Department of Neurosurgery, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - L Wang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - F Feng
- Department of Radiology, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - B Xing
- Department of Neurosurgery, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - H Pan
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China
| | - H Zhu
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, 100730, China.
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Abstract
CONTEXT Resistance exercise training has recently been considered as an effective type of training to increase energy metabolism and insulin sensitivity. However, mechanisms of the resistance training-induced improvements in energy metabolism and insulin sensitivity have not been fully understood. Zinc-α2-glycoprotein (ZAG), which is a novel adipokine, has beneficial effects on energy metabolism and insulin sensitivity. OBJECTIVE We investigated the effect of a single bout of resistance exercise on the ZAG concentration. METHODS Nine healthy men were enrolled. They performed a single bout of resistance exercise (bench press and leg press) consisting of 10 repetitions of five sets at 70% of maximum strength with 90-s rests in between sets. Blood samples were obtained before and after acute resistance exercise to measure the ZAG concentration. RESULTS The serum ZAG concentration significantly increased following acute resistance exercise. CONCLUSION This result suggests that a single bout of resistance exercise may enhance the ZAG concentration.
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Affiliation(s)
- Michihiro Kon
- School of International Liberal Studies, Chukyo University, Nagoya, Japan
- Department of Sports Sciences, Japan Institute of Sports Sciences, Tokyo, Japan
| | - Yasuhiro Suzuki
- Department of Sports Research, Japan Institute of Sports Sciences, Tokyo, Japan
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Caputo M, Pigni S, Agosti E, Daffara T, Ferrero A, Filigheddu N, Prodam F. Regulation of GH and GH Signaling by Nutrients. Cells 2021; 10:1376. [PMID: 34199514 PMCID: PMC8227158 DOI: 10.3390/cells10061376] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/27/2021] [Accepted: 05/28/2021] [Indexed: 02/06/2023] Open
Abstract
Growth hormone (GH) and insulin-like growth factor-1 (IGF-I) are pleiotropic hormones with important roles in lifespan. They promote growth, anabolic actions, and body maintenance, and in conditions of energy deprivation, favor catabolic feedback mechanisms switching from carbohydrate oxidation to lipolysis, with the aim to preserve protein storages and survival. IGF-I/insulin signaling was also the first one identified in the regulation of lifespan in relation to the nutrient-sensing. Indeed, nutrients are crucial modifiers of the GH/IGF-I axis, and these hormones also regulate the complex orchestration of utilization of nutrients in cell and tissues. The aim of this review is to summarize current knowledge on the reciprocal feedback among the GH/IGF-I axis, macro and micronutrients, and dietary regimens, including caloric restriction. Expanding the depth of information on this topic could open perspectives in nutrition management, prevention, and treatment of GH/IGF-I deficiency or excess during life.
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Affiliation(s)
- Marina Caputo
- SCDU of Endocrinology, University Hospital Maggiore della Carità, 28100 Novara, Italy; (M.C.); (S.P.); (T.D.); (A.F.)
- Department of Health Sciences, Università del Piemonte Orientale, 28100 Novara, Italy;
| | - Stella Pigni
- SCDU of Endocrinology, University Hospital Maggiore della Carità, 28100 Novara, Italy; (M.C.); (S.P.); (T.D.); (A.F.)
| | - Emanuela Agosti
- Department of Health Sciences, Università del Piemonte Orientale, 28100 Novara, Italy;
| | - Tommaso Daffara
- SCDU of Endocrinology, University Hospital Maggiore della Carità, 28100 Novara, Italy; (M.C.); (S.P.); (T.D.); (A.F.)
| | - Alice Ferrero
- SCDU of Endocrinology, University Hospital Maggiore della Carità, 28100 Novara, Italy; (M.C.); (S.P.); (T.D.); (A.F.)
| | - Nicoletta Filigheddu
- Department of Translational Medicine, Università del Piemonte Orientale, 28100 Novara, Italy;
| | - Flavia Prodam
- SCDU of Endocrinology, University Hospital Maggiore della Carità, 28100 Novara, Italy; (M.C.); (S.P.); (T.D.); (A.F.)
- Department of Health Sciences, Università del Piemonte Orientale, 28100 Novara, Italy;
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Poklukar K, Čandek-Potokar M, Vrecl M, Batorek-Lukač N, Fazarinc G, Kress K, Stefanski V, Škrlep M. Adipose Tissue Gene Expression of Entire Male, Immunocastrated and Surgically Castrated Pigs. Int J Mol Sci 2021; 22:1768. [PMID: 33578947 PMCID: PMC7916650 DOI: 10.3390/ijms22041768] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/01/2021] [Accepted: 02/06/2021] [Indexed: 12/13/2022] Open
Abstract
Differences in adipose tissue deposition and properties between pig male sex categories, i.e., entire males (EM), immunocastrates (IC) and surgical castrates (SC) are relatively well-characterized, whereas the underlying molecular mechanisms are still not fully understood. To gain knowledge about the genetic regulation of the differences in adipose tissue deposition, two different approaches were used: RNA-sequencing and candidate gene expression by quantitative PCR. A total of 83 differentially expressed genes were identified between EM and IC, 15 between IC and SC and 48 between EM and SC by RNA-sequencing of the subcutaneous adipose tissue. Comparing EM with IC or SC, upregulated genes related to extracellular matrix dynamics and adipogenesis, and downregulated genes involved in the control of lipid and carbohydrate metabolism were detected. Differential gene expression generally indicated high similarity between IC and SC as opposed to EM, except for several heat shock protein genes that were upregulated in EM and IC compared with SC. The candidate gene expression approach showed that genes involved in lipogenesis were downregulated in EM compared with IC pigs, further confirming RNA-sequencing results.
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Affiliation(s)
- Klavdija Poklukar
- Agricultural Institute of Slovenia, Hacquetova ulica 17, 1000 Ljubljana, Slovenia; (K.P.); (M.Č.-P.); (N.B.-L.)
| | - Marjeta Čandek-Potokar
- Agricultural Institute of Slovenia, Hacquetova ulica 17, 1000 Ljubljana, Slovenia; (K.P.); (M.Č.-P.); (N.B.-L.)
- Faculty of Agriculture and Life Sciences, University of Maribor, Pivola 10, 2311 Hoče, Slovenia
| | - Milka Vrecl
- Institute of Preclinical Sciences, Veterinary Faculty, University of Ljubljana, Gerbičeva ulica 60, 1000 Ljubljana, Slovenia; (M.V.); (G.F.)
| | - Nina Batorek-Lukač
- Agricultural Institute of Slovenia, Hacquetova ulica 17, 1000 Ljubljana, Slovenia; (K.P.); (M.Č.-P.); (N.B.-L.)
| | - Gregor Fazarinc
- Institute of Preclinical Sciences, Veterinary Faculty, University of Ljubljana, Gerbičeva ulica 60, 1000 Ljubljana, Slovenia; (M.V.); (G.F.)
| | - Kevin Kress
- Behavioural Physiology of Livestock, Institute of Animal Science, University of Hohenheim, Garbenstrasse 17, 70599 Stuttgart, Germany; (K.K.); (V.S.)
| | - Volker Stefanski
- Behavioural Physiology of Livestock, Institute of Animal Science, University of Hohenheim, Garbenstrasse 17, 70599 Stuttgart, Germany; (K.K.); (V.S.)
| | - Martin Škrlep
- Agricultural Institute of Slovenia, Hacquetova ulica 17, 1000 Ljubljana, Slovenia; (K.P.); (M.Č.-P.); (N.B.-L.)
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Expression and Function of Zinc-α2-Glycoprotein. Neurosci Bull 2019; 35:540-550. [PMID: 30610461 DOI: 10.1007/s12264-018-00332-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 09/26/2018] [Indexed: 12/13/2022] Open
Abstract
Zinc-α2-glycoprotein (ZAG), encoded by the AZGP1 gene, is a major histocompatibility complex I molecule and a lipid-mobilizing factor. ZAG has been demonstrated to promote lipid metabolism and glucose utilization, and to regulate insulin sensitivity. Apart from adipose tissue, skeletal muscle, liver, and kidney, ZAG also occurs in brain tissue, but its distribution in brain is debatable. Only a few studies have investigated ZAG in the brain. It has been found in the brains of patients with Krabbe disease and epilepsy, and in the cerebrospinal fluid of patients with Alzheimer disease, frontotemporal lobe dementia, and amyotrophic lateral sclerosis. Both ZAG protein and AZGP1 mRNA are decreased in epilepsy patients and animal models, while overexpression of ZAG suppresses seizure and epileptic discharges in animal models of epilepsy, but knowledge of the specific mechanism of ZAG in epilepsy is limited. In this review, we summarize the known roles and molecular mechanisms of ZAG in lipid metabolism and glucose metabolism, and in the regulation of insulin sensitivity, and discuss the possible mechanisms by which it suppresses epilepsy.
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Mokari-Yamchi A, Sharifi A, Kheirouri S. Increased serum levels of S100A1, ZAG, and adiponectin in cachectic patients with COPD. Int J Chron Obstruct Pulmon Dis 2018; 13:3157-3163. [PMID: 30349224 PMCID: PMC6183696 DOI: 10.2147/copd.s172996] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background COPD is a common irreversible obstructive airway disease. S100A1, ZAG, and adiponectin are important regulators of energy metabolism and body weight. Therefore, the aim of this study was to assess resting metabolic rate (RMR) and its association with serum levels of S100A1, ZAG, and adiponectin in cachectic and noncachectic COPD patients. Patients and methods Ninety men with COPD, aged 40–70 years, were enrolled in the study. Patients were divided into the following two groups based on the unintentional weight loss of .7.5% in previous 6 months: noncachectic (n=45) and cachectic (n=45). The groups were matched based on age and body mass index (BMI). RMR was measured by indirect calorimetry method. Anthropometric indices and body composition were also measured. Serum levels of S100A1, ZAG, and adiponectin were measured by ELISA. Results Cachectic patients had significantly higher RMR than controls (P<0.001). Serum levels of ZAG, S100A1, and adiponectin were significantly higher in the cachexia group (P<0.0001). RMR was not significantly associated with S100A1, ZAG, and adiponectin levels. However, weight loss of patients was significantly associated with serum levels of ZAG and adiponectin (both, β=0.22, P=0.03). Strong and positive association were found between the serum levels of S100A1 and ZAG (β=0.88, P<0.0001), S100A1 and adiponectin (β=0.86, P<0.0001), and also ZAG and adiponectin (β=0.83, P<0.0001). Conclusion The potential role of these factors in the wasting process is considerable. Also, the association between serum levels of S100A1, ZAG, and adiponectin represents that these three proteins are probably related to specific functions.
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Affiliation(s)
- Amin Mokari-Yamchi
- Department of Community Nutrition, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran,
| | - Akbar Sharifi
- Tuberculosis and Lung Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sorayya Kheirouri
- Department of Community Nutrition, Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran,
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Boschetti M, Agosti S, Albanese V, Casalino L, Teti C, Bezante GP, Brunelli C, Albertelli M, Ferone D. One-year GH replacement therapy reduces early cardiac target organ damage (TOD) in adult GHD patients. Endocrine 2017; 55:573-581. [PMID: 27075720 DOI: 10.1007/s12020-016-0951-4] [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: 12/07/2015] [Accepted: 04/02/2016] [Indexed: 10/22/2022]
Abstract
Hypopituitarism reduces life expectancy and increases the risk of cardiovascular and cerebrovascular diseases, as well as death. Abnormalities in the cardiovascular system may be independently related to GH deficiency (GHD). The aim of this study was to prospectively investigate coronary flow reserve and diastolic function in GHD adult patients at diagnosis and after 1 year of GH replacement therapy. As control group, an age- and sex-matched population was chosen. All patients and controls were non-smokers, non-diabetic, and normotensive, with no history of vascular disease. 14 patients with adult-onset GHD and 17 controls represent the two study groups. Anthropometric data, blood pressure, lipid profile, glycosylated hemoglobin (HbA1c) and IGF-I plasma levels, coronary flow reserve (CFR), and LV diastolic function (evaluated by E/A) were collected in all subjects before and after 12 months of GH replacement therapy. Compared with controls, systolic and diastolic blood pressure and LDL cholesterol levels were significantly higher at baseline and return, comparable to controls after 1 year of GH replacement (GHRT). GHD patients showed a blunted CFR at baseline (P < 0.001) and a significant improvement after GHRT, returning to values comparable with those recorded in the control group. In addition, after therapy a significant (P < 0.001) improvement in E/A was recorded. One year of GH therapy improves CFR and E/A in the patient population analyzed, thereby encouraging the early start of GHRT.
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Affiliation(s)
- Mara Boschetti
- Endocrinology Unit (DiMI), Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Viale Benedetto XV, 6, 16132, Genoa, Italy.
- Center of Excellence for Biomedical Research, University of Genoa, Genoa, Italy.
| | - Sergio Agosti
- Cardiology Unit, Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Genoa, Italy
| | - Valeria Albanese
- Endocrinology Unit (DiMI), Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Viale Benedetto XV, 6, 16132, Genoa, Italy
| | - Laura Casalino
- Cardiology Unit, Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Genoa, Italy
| | - Claudia Teti
- Endocrinology Unit (DiMI), Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Viale Benedetto XV, 6, 16132, Genoa, Italy
| | - Gian Paolo Bezante
- Cardiology Unit, Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Genoa, Italy
| | - Claudio Brunelli
- Cardiology Unit, Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Genoa, Italy
| | - Manuela Albertelli
- Endocrinology Unit (DiMI), Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Viale Benedetto XV, 6, 16132, Genoa, Italy
- Center of Excellence for Biomedical Research, University of Genoa, Genoa, Italy
| | - Diego Ferone
- Endocrinology Unit (DiMI), Department of Internal Medicine & Medical Specialties, IRCCS AOU San Martino-IST, University of Genoa, Viale Benedetto XV, 6, 16132, Genoa, Italy
- Center of Excellence for Biomedical Research, University of Genoa, Genoa, Italy
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Balaž M, Ukropcova B, Kurdiova T, Vlcek M, Surova M, Krumpolec P, Vanuga P, Gašperíková D, Klimeš I, Payer J, Wolfrum C, Ukropec J. Improved adipose tissue metabolism after 5-year growth hormone replacement therapy in growth hormone deficient adults: The role of zinc-α2-glycoprotein. Adipocyte 2015; 4:113-22. [PMID: 26167410 DOI: 10.4161/21623945.2014.973772] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 09/14/2014] [Accepted: 10/02/2014] [Indexed: 01/17/2023] Open
Abstract
Growth hormone (GH) supplementation therapy to adults with GH deficiency has beneficial effects on adipose tissue lipid metabolism, improving thus adipocyte functional morphology and insulin sensitivity. However, molecular nature of these effects remains unclear. We therefore tested the hypothesis that lipid-mobilizing adipokine zinc-α2-glycoprotein is causally linked to GH effects on adipose tissue lipid metabolism. Seventeen patients with severe GH deficiency examined before and after the 5-year GH replacement therapy were compared with age-, gender- and BMI-matched healthy controls. Euglycemic hyperinsulinemic clamp was used to assess whole-body and adipose tissue-specific insulin sensitivity. Glucose tolerance was determined by oGTT, visceral and subcutaneous abdominal adiposity by MRI, adipocyte size morphometrically after collagenase digestion, lipid accumulation and release was studied in differentiated human primary adipocytes in association with GH treatment and zinc-α2-glycoprotein gene silencing. Five-year GH replacement therapy improved glucose tolerance, adipose tissue insulin sensitivity and reduced adipocyte size without affecting adiposity and whole-body insulin sensitivity. Adipose tissue zinc-α2-glycoprotein expression was positively associated with whole-body and adipose tissue insulin sensitivity and negatively with adipocyte size. GH treatment to adipocytes in vitro increased zinc-α2-glycoprotein expression (>50%) and was paralleled by enhanced lipolysis and decreased triglyceride accumulation (>35%). Moreover, GH treatment improved antilipolytic action of insulin in cultured adipocytes. Most importantly, silencing zinc-α2-glycoprotein eliminated all of the GH effects on adipocyte lipid metabolism. Effects of 5-year GH supplementation therapy on adipose tissue lipid metabolism and insulin sensitivity are associated with zinc-α2-glycoprotein. Presence of this adipokine is required for the GH action on adipocyte lipid metabolism in vitro.
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Key Words
- ACC1, acetyl-CoA carboxylase 1
- BSA, bovine serum albumin
- DGAT, diacylglycerol acyltransferase
- DMEM, Dulbecco's Modified Eagle Medium
- EHC, euglycemic hyperinsulinemic clamp
- FABP4, fatty acid binding protein 4
- FAS, fatty acid synthase
- FBS, fetal bovine serum
- FFA, free fatty acids
- GAPDH, glyceraldehyde-3-phosphate dehydrogenase
- GH, growth hormone
- GHD, growth hormone deficiency
- GLUT4, glucose transporter 4
- HSL, hormone sensitive lipase
- IGF-1, insulin-like growth factor 1
- IRS1, insulin receptor substrate 1
- MRI, magnetic resonance imaging
- PPARGC1A, peroxisome proliferator-activated receptor 1 gamma coactivator 1 α
- RPL13A, ribosomal protein L13a
- TG, triglycerides
- ZAG, zinc-α2-glycoprotein.
- adipocyte size
- adipose tissue
- glucose tolerance
- growth hormone deficiency
- growth hormone replacement therapy
- insulin sensitivity
- lipolysis
- oGTT, oral glucose tolerance test
- rhGH, recombinant human growth hormone
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