1
|
Zhu L, Dou Z, Wu W, Hou Q, Wang S, Yuan Z, Li B, Liu J. Ghrelin/GHSR Axis Induced M2 Macrophage and Alleviated Intestinal Barrier Dysfunction in a Sepsis Rat Model by Inactivating E2F1/NF- κB Signaling. Can J Gastroenterol Hepatol 2023; 2023:1629777. [PMID: 38187112 PMCID: PMC10769719 DOI: 10.1155/2023/1629777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 10/20/2023] [Accepted: 12/11/2023] [Indexed: 01/09/2024] Open
Abstract
Sepsis is an inflammatory reaction disorder state that is induced by infection. The activation and regulation of the immune system play an essential role in the development of sepsis. Our previous studies have shown that ghrelin ameliorates intestinal dysfunction in sepsis. Very little is known about the mechanism of ghrelin and its receptor (GHSR) on the intestinal barrier and the immune function of macrophage regulation. Our research is to investigate the regulatory effect and molecular mechanism of the ghrelin/GHSR axis on intestinal dysfunction and macrophage polarization in septic rats. A rat model of sepsis was established by cecal ligation and puncture (CLP) operation. Then, the sepsis rats were treated with a ghrelin receptor agonist (TZP-101) or ghrelin inhibitor (obestatin). The results suggested that TZP-101 further enhanced ghrelin and GHSR expressions in the colon and spleen of septic rats and obestatin showed the opposite results. Ghrelin/GHSR axis ameliorated colonic structural destruction and intestinal epithelial tight junction injury in septic rats. In addition, the ghrelin/GHSR axis promoted M2-type polarization of macrophages, which was characterized by the decreases of IL-1β, IL-6, and TNF-α, as well as the increase of IL-10. Mechanistically, the ghrelin/GHSR axis promoted E2F2 expression and suppressed the activation of the NF-κB signaling pathway in septic rats. Collectively, targeting ghrelin/GHSR during sepsis may represent a novel therapeutic approach for the treatment of intestinal barrier injury.
Collapse
Affiliation(s)
- Lei Zhu
- Department of Intensive Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Zhimin Dou
- Department of Intensive Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Wei Wu
- Department of Intensive Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Qiliang Hou
- Department of Intensive Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Sen Wang
- Department of Intensive Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Ziqian Yuan
- Department of Intensive Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Bin Li
- Department of Intensive Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Jian Liu
- Department of Intensive Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
2
|
Duan J, Cheng M, Xu Y, Tang S, Li X, Chen Y, Lu H, Gao T, Yu W. Comparison of the effects of different calorie amounts of enteral nutrition in hypercatabolism associated with ghrelin-POMC in endotoxemic rats. Nutr Metab (Lond) 2022; 19:28. [PMID: 35428321 PMCID: PMC9013094 DOI: 10.1186/s12986-022-00663-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 03/30/2022] [Indexed: 11/12/2022] Open
Abstract
Background Hypercatabolism often occurs in critically ill patients, and it increases infection rates and mortality in these patients. Enteral nutrition (EN) is commonly used in case of hypercatabolism. However, the effect of amount of calories in EN on hypercatabolism remains unexplored. Objective Here, we compared the effect of low-calorie, medium-calorie and high-calorie EN on hypercatabolism in the acute phase of endotoxemia, which is associated with gastrointestinal hormones and hypothalamic neuropeptide proopiomelanocortin (POMC).
Methods Overall 84 adult male Sprague–Dawley rats were used for research. A set of rats were divided into 5 groups, Control (NS) and lipopolysaccharide (LPS) groups were fed a standard chow diet; LPS + L (LPS + 40 kcal/kg/day EN), LPS + M (LPS + 80 kcal/kg/day EN) and LPS + H (LPS + 120 kcal/kg/day EN) groups received EN through a gastric tube for 3 days. Another set of rats were used for parallel control experiment and divided into 5 groups: NS + F (saline + fasting) and LPS + F (LPS + fasting) groups were given no food, NS + L (saline + 40 kcal/kg/day EN), NS + M (saline + 80 kcal/kg/day EN) and NS + H (saline + 120 kcal/kg/day EN) groups received EN through a gastric tube for 3 days. Hypercatabolism was evaluated by assessing skeletal muscle protein synthesis and atrophy, insulin resistance, and corticosterone levels. Moreover, serum inflammatory factors, gastrointestinal hormones, hypothalamic ghrelin, growth hormone secretagogue receptor-1α, hypothalamic neuropeptide, and intestinal injury indicators were detected. Results Low-calorie EN effectively increased serum and hypothalamic ghrelin possibly due to slight intestinal barrier damage, thereby decreasing hypothalamic POMC expression; consequently, it alleviated rat insulin resistance, reduced blood cortisol levels and muscle atrophy, and improved the survival rate of rats in the acute phase of endotoxemia. Interestingly, with an increase in calories in enteral nutrition, the aforementioned effects did not increase. Conclusions Low-calorie EN could effectively increase gastrointestinal hormone ghrelin by reducing intestinal damage and suppressing POMC expression to ameliorate hypercatabolism when compared with medium-calorie and high-calorie EN. Therefore Low-calorie EN may be preferred for providing EN in the acute stage of endotoxemia. Supplementary Information The online version contains supplementary material available at 10.1186/s12986-022-00663-7.
Collapse
Affiliation(s)
- Jianfeng Duan
- Affiliated Drum Tower Hospital, Medical School of Nanjing University, 321st Zhongshan Road, Nanjing, Jiangsu, People's Republic of China.,Medical School, Nanjing University, 22nd Hankou Road, Nanjing, Jiangsu, People's Republic of China
| | - Minhua Cheng
- Affiliated Drum Tower Hospital, Medical School of Nanjing University, 321st Zhongshan Road, Nanjing, Jiangsu, People's Republic of China
| | - Yali Xu
- Affiliated Drum Tower Hospital, Medical School of Nanjing University, 321st Zhongshan Road, Nanjing, Jiangsu, People's Republic of China.,Medical School, Nanjing University, 22nd Hankou Road, Nanjing, Jiangsu, People's Republic of China
| | - Shaoqiu Tang
- Nanjing University Hospital, 22nd Hankou Road, Nanjing, Jiangsu, People's Republic of China
| | - Xiaoyao Li
- Affiliated Drum Tower Hospital, Medical School of Nanjing University, 321st Zhongshan Road, Nanjing, Jiangsu, People's Republic of China
| | - Yan Chen
- Affiliated Drum Tower Hospital, Medical School of Nanjing University, 321st Zhongshan Road, Nanjing, Jiangsu, People's Republic of China
| | - Huimin Lu
- Affiliated Drum Tower Hospital, Medical School of Nanjing University, 321st Zhongshan Road, Nanjing, Jiangsu, People's Republic of China.,Medical School, Nanjing University, 22nd Hankou Road, Nanjing, Jiangsu, People's Republic of China
| | - Tao Gao
- Affiliated Drum Tower Hospital, Medical School of Nanjing University, 321st Zhongshan Road, Nanjing, Jiangsu, People's Republic of China
| | - Wenkui Yu
- Affiliated Drum Tower Hospital, Medical School of Nanjing University, 321st Zhongshan Road, Nanjing, Jiangsu, People's Republic of China. .,Medical School, Nanjing University, 22nd Hankou Road, Nanjing, Jiangsu, People's Republic of China.
| |
Collapse
|
3
|
Mathur N, Mehdi SF, Anipindi M, Aziz M, Khan SA, Kondakindi H, Lowell B, Wang P, Roth J. Ghrelin as an Anti-Sepsis Peptide: Review. Front Immunol 2021; 11:610363. [PMID: 33584688 PMCID: PMC7876230 DOI: 10.3389/fimmu.2020.610363] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 12/09/2020] [Indexed: 12/15/2022] Open
Abstract
Sepsis continues to produce widespread inflammation, illness, and death, prompting intensive research aimed at uncovering causes and therapies. In this article, we focus on ghrelin, an endogenous peptide with promise as a potent anti-inflammatory agent. Ghrelin was discovered, tracked, and isolated from stomach cells based on its ability to stimulate release of growth hormone. It also stimulates appetite and is shown to be anti-inflammatory in a wide range of tissues. The anti-inflammatory effects mediated by ghrelin are a result of both the stimulation of anti-inflammatory processes and an inhibition of pro-inflammatory forces. Anti-inflammatory processes are promoted in a broad range of tissues including the hypothalamus and vagus nerve as well as in a broad range of immune cells. Aged rodents have reduced levels of growth hormone (GH) and diminished immune responses; ghrelin administration boosts GH levels and immune response. The anti-inflammatory functions of ghrelin, well displayed in preclinical animal models of sepsis, are just being charted in patients, with expectations that ghrelin and growth hormone might improve outcomes in patients with sepsis.
Collapse
Affiliation(s)
- Nimisha Mathur
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Syed F. Mehdi
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Manasa Anipindi
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Monowar Aziz
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
- Center for Immunology and Inflammation, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Sawleha A. Khan
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Hema Kondakindi
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Barbara Lowell
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Ping Wang
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
- Center for Immunology and Inflammation, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Jesse Roth
- Laboratory of Diabetes, Obesity, and Other Metabolic Disorders, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| |
Collapse
|