Effects of β‑hydroxybutyric acid and ghrelin on the motility and inflammation of gastric antral smooth muscle cells involving the regulation of growth hormone secretagogue receptor
| Autor: | Juan Wu, Chang-Hua Hu, Zong-Hui Wu, Xiao-Lin Hu, Li You, Xiao-Yan He, Wen-Jie Huang, Min Ai |
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| Rok vydání: | 2019 |
| Předmět: |
Male
0301 basic medicine Cancer Research RHOA Growth hormone secretagogue receptor β-hydroxybutyric acid Biochemistry 0302 clinical medicine Cell Movement Receptors Ghrelin 3-Hydroxybutyric Acid biology Chemistry digestive oral and skin physiology Transforming Protein RhoA Articles Ghrelin Oncology 030220 oncology & carcinogenesis Molecular Medicine Female Disease Susceptibility Oxidation-Reduction hormones hormone substitutes and hormone antagonists motility and inflammation medicine.medical_specialty Myosin light-chain kinase Cell Survival Myocytes Smooth Muscle Motility Superoxide dismutase 03 medical and health sciences Internal medicine Genetics medicine Animals Humans Viability assay Molecular Biology growth hormone secretagogue receptor Rats 030104 developmental biology Endocrinology Gene Expression Regulation biology.protein gastric antral smooth muscle cells Gastrointestinal Motility Reactive Oxygen Species Biomarkers |
| Zdroj: | Molecular Medicine Reports |
| ISSN: | 1791-3004 1791-2997 |
| DOI: | 10.3892/mmr.2019.10739 |
| Popis: | Ghrelin is an orexigenic hormone that is produced by gastric cells. Ghrelin stimulates food intake and increases gastric movement. In rat model, injected β-hydroxybutyric acid (β-HB) leads to a decrease in body weight. It has been reported that patients with gastric erosions are slower to evacuate the stomach. The aim of the present study was to investigate the effects of ghrelin and β-HB on motility and inflammation in rat gastric antral smooth muscle cells (GASMCs). GASMCs were extracted from rat gastric antrum. Cell viability was determined using the Cell Counting Kit-8 assay. A reactive oxygen species (ROS) assay kit was used to analyze the levels of ROS using flow cytometry. Protein levels were determined using western blotting, and the expression levels of mRNAs were evaluated using reverse transcription-quantitative PCR. β-HB inhibited the expression of myosin regulatory light polypeptide 9 (MYL9), myosin light chain kinase (MLCK), transforming protein RhoA (RhoA), Rho-associated protein kinase-1 (ROCK-1) and growth hormone secretagogue receptor (GHS-R). By contrast, ghrelin increased the expression of MYL9, MLCK, RhoA, ROCK-1 and GHS-R in β-HB-treated GASMCs. β-HB increased the levels of tumor necrosis factor (TNF)-α, interleukin (IL)-6 and ROS, and decreased the levels of manganese (Mn) superoxide dismutase (SOD), copper/zinc (Cu/Zn)SOD and catalase. Ghrelin decreased the expression of TNF-α, IL-6, ROS and catalase, whereas ghrelin promoted the expression of MnSOD and Cu/ZnSOD in β-HB-treated GASMCs. Short interfering RNA targeting GHS-R inhibited the expression of MYL9, MLCK, RhoA and ROCK-1, and increased the levels of TNF-α, IL-6 and ROS in β-HB-treated or ghrelin-treated GASMCs. The present study provided preliminary evidence that β-HB inhibits the motility of GASMCs and promotes inflammation in GASMCs, whereas ghrelin decreases these effects. GHS-R acted as a primary regulator of motility and inflammation in GASMCs treated with β-HB and ghrelin. |
| Databáze: | OpenAIRE |
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