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I Azzam Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel

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S Gilad Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel

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R Limor Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel

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N Stern Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel
Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel

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Y Greenman Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Tel Aviv, Israel
Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel

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Introduction Ghrelin is a major regulator of food intake, energy balance and body weight ( 1 ). The active form of ghrelin, acyl-ghrelin, is the endogenous ligand for the growth hormone secretagogue receptor (GHSR)1a ( 2 ). Since its cloning

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Metin Guclu Health Sciences University, Bursa Yuksek Ihtisas Education and Training Hospital, Department of Endocrinology and Metabolism, Bursa, Turkey

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Sinem Kiyici Health Sciences University, Bursa Yuksek Ihtisas Education and Training Hospital, Department of Endocrinology and Metabolism, Bursa, Turkey

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Zulfiye Gul Department of Pharmacology, Uludag University Medical Faculty, Bursa, Turkey

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Sinan Cavun Department of Pharmacology, Uludag University Medical Faculty, Bursa, Turkey

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mechanism of how GLP-1 agonists promote weight loss is not clearly understood. Ghrelin, which is a potent gut–brain orexigenic peptide, plays an important role in the stimulation of food intake and long-term regulation of body weight ( 6 , 7

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Caishun Zhang Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Junhua Yuan Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Qian Lin Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Manwen Li Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Liuxin Wang Hyperbaric Oxygen Therapy Department, Yuhuangding Hospital Affiliated to Qingdao University, Yantai, China

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Rui Wang Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Xi Chen Physiology Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Zhengyao Jiang Physiology Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Kun Zhu Intensive Care Unit Department, Affiliated Hospital of Qingdao University, Qingdao, China

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Xiaoli Chang Institute of Acupuncture, Shandong University of Traditional Chinese Medicine, Jinan, China

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Bin Wang Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, China
Medical Microbiology Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Jing Dong Special Medicine Department, College of Basic Medicine, Qingdao University, Qingdao, China
Physiology Department, College of Basic Medicine, Qingdao University, Qingdao, China

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Introduction Ghrelin is a 28 amino acids acylated peptide, which was first discovered as an endogenous natural ligand for the growth hormone secretagogue receptor(GHSR) 1α by Kojima et al . in 1999 ( 1 ). Ghrelin was first described to

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Jiaxi Li Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China

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Pu Huang Department of Health Management Center, Changsha Central Hospital, University of South China, Changsha, Hunan, China

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Jing Xiong Department of Endocrinology, Xiangya Third Hospital, Central South University, Changsha, Hunan, China

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Xinyue Liang Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China

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Mei Li Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China

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Hao Ke Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China

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Chunli Chen Department of Dermatology, Xiangya Third Hospital, Central South University, Changsha, Hunan, China

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Yang Han Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China

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Yanhong Huang Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China

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Yan Zhou Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China

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Ziqiang Luo Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha, Hunan, China

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Dandan Feng Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha, Hunan, China

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Chen Chen School of Biomedical Sciences, University of Queensland, St Lucia, Brisbane, Queensland, Australia

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Introduction Ghrelin is a gastrointestinal tract-derived hormone containing 28 amino acids. It was first discovered in 1999 as an endogenous growth hormone secretagogue (GHS) to promote the secretion of GH ( 1 ). According to its acylation

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Mardia López-Alarcón Unidad de Investigación Médica en Nutrición, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México, Mexico

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Jessie N Zurita-Cruz Unidad de Investigación Médica en Nutrición, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México, Mexico

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Alonso Torres-Rodríguez Escuela Española de Desarrollo Transpersonal, Madrid, España

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Karla Bedia-Mejía Unidad de Investigación Médica en Nutrición, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México, Mexico

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Manuel Pérez-Güemez Unidad de Investigación Médica en Nutrición, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México, Mexico

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Leonel Jaramillo-Villanueva Departamento de Psiquiatría, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México, Mexico

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Mario E Rendón-Macías Universidad Panamericana, Facultad de Ciencias de la Salud, Escuela de Medicina, México, Mexico

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Jose R Fernández Departments of Nutrition Sciences and Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama, USA

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Patricia Martínez-Maroñas Escuela Española de Desarrollo Transpersonal, Madrid, España

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stress, mindfulness may affect cortisol ( 11 ), which secondarily may affect some hormones involved in appetite regulation such as insulin ( 12 ), leptin and ghrelin ( 13 ). However, the results of these investigations are controversial ( 7 , 8 , 9

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Esben Thyssen Vestergaard Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark
Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark
Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark

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Morten B Krag Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark

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Morten M Poulsen Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark

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Steen B Pedersen Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark

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Niels Moller Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark
Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark

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Jens Otto Lunde Jorgensen Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark
Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark

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Niels Jessen Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark
Medical Research Laboratories, Department of Endocrinology and Diabetes, Department of Pediatrics, Department of Endocrinology and Diabetes, Institute of Clinical Medicine, Aarhus University, Norrebrogade 44, DK-8000 Aarhus C, Denmark

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Introduction GH release from the pituitary gland is considered to be regulated at the hypothalamic level by GH releasing hormone (GHRH) and somatostatin (1) . More recently, ghrelin, an endogenous ligand of the GH secretagogue receptor (GHS-R), has

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Roxanne C S van Adrichem Department of Internal Medicine, Sector of Endocrinology, ENETS Centre of Excellence for Neuroendocrine Tumors, Erasmus MC, Rotterdam, The Netherlands

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Aart Jan van der Lely Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands

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Martin Huisman Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands

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Piet Kramer Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands

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Richard A Feelders Department of Internal Medicine, Sector of Endocrinology, ENETS Centre of Excellence for Neuroendocrine Tumors, Erasmus MC, Rotterdam, The Netherlands

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Patric J D Delhanty Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands

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Wouter W de Herder Department of Internal Medicine, Sector of Endocrinology, ENETS Centre of Excellence for Neuroendocrine Tumors, Erasmus MC, Rotterdam, The Netherlands

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Introduction Ghrelin is a gut–brain hormone that is produced predominantly by gastric X/A-like neuroendocrine cells ( 1 , 2 ). Ghrelin exists in two forms: acylated ghrelin (AG) and unacylated ghrelin (UAG). About 50% of circulating ghrelin

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H Vlaardingerbroek Department of Pediatrics, Subdivision of Endocrinology, Erasmus University Medical Center-Sophia Children’s Hospital, Rotterdam, The Netherlands
Willem-Alexander Children’s Hospital, Department of Pediatrics, Division of Endocrinology, Leiden University Medical Center, Leiden, The Netherlands

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E L T van den Akker Department of Pediatrics, Subdivision of Endocrinology, Erasmus University Medical Center-Sophia Children’s Hospital, Rotterdam, The Netherlands

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A C S Hokken-Koelega Department of Pediatrics, Subdivision of Endocrinology, Erasmus University Medical Center-Sophia Children’s Hospital, Rotterdam, The Netherlands

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. Figure 1 Neuroendocrine factors and interactions in the hypothalamus. In the gastrointestinal tract, multiple neuroendocrine hormones are produced. Ghrelin is the only gut hormone that stimulates feeding. Other hormones, including cholecystokinin (CCK

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Peiwen Zheng School of Mental Health, Wenzhou Medical University, The Affiliated Kangning Hospital, Wenzhou, China

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Fan Wang Beijing Hui-Long-Guan Hospital, Peking University, Beijing, China

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Hui Li Psychosomatic Medicine Research Division, Inner Mongolia Medical University, Huhhot, China

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Hanlu Chen School of Mental Health, Wenzhou Medical University, The Affiliated Kangning Hospital, Wenzhou, China

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Mengtong Li School of Mental Health, Wenzhou Medical University, The Affiliated Kangning Hospital, Wenzhou, China

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Haozheng Ma School of Mental Health, Wenzhou Medical University, The Affiliated Kangning Hospital, Wenzhou, China

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Jue He School of Mental Health, Wenzhou Medical University, The Affiliated Kangning Hospital, Wenzhou, China

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Li Chen School of Mental Health, Wenzhou Medical University, The Affiliated Kangning Hospital, Wenzhou, China

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Yanlong Liu School of Mental Health, Wenzhou Medical University, The Affiliated Kangning Hospital, Wenzhou, China

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Haiyun Xu School of Mental Health, Wenzhou Medical University, The Affiliated Kangning Hospital, Wenzhou, China

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). In the present study, we compared AS and NS in levels of adiponectin, ghrelin, leptin, and orexin A in their CSF, in addition to demographic data and BMI of the two groups. All these hormones are involved in energy balance in humans. We also measured

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Cheryl M Isherwood Section of Chronobiology, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom

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M Denise Robertson Section of Metabolic Medicine, Food and Macronutrients, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom

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Debra J Skene Section of Chronobiology, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom

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Jonathan D Johnston Section of Chronobiology, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom

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the functional link between pancreatic clocks, insulin secretion and T2D ( 20 , 21 ). In addition, obesity has been associated with reduced amplitude in the daily rhythms of circulating hormones, such as leptin ( 22 ) and ghrelin ( 23 ). Reduced

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