Journal of Inflammation Research (Apr 2021)
Research on Correlation Between Psychological Factors, Mast Cells, and PAR-2 Signal Pathway in Irritable Bowel syndrome
Abstract
Guanqun Chao,1 Zhaojun Wang,2 Shuo Zhang3 1Department of General Practice, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, People’s Republic of China; 2The First Clinical Medical College of Zhejiang Chinese Medicine University, Hangzhou, People’s Republic of China; 3Department of Gastroenterology, The First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, People’s Republic of ChinaCorrespondence: Shuo ZhangDepartment of Gastroenterology, The First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, People’s Republic of ChinaTel +86 13957192066Email [email protected]: The study aimed to explore the level of psychological stress factors, mast cell (MC), and neuropeptide in the occurrence of irritable bowel syndrome (IBS) and the correlation among them, and to identify representative and effective indicators for the pathogenesis and clinical medication development of IBS.Subjects and Methods: Twenty-eight patients (20– 64 years old) with diarrhea-predominant IBS (IBS-D) were included in the IBS-D group and 8 healthy subjects (35– 63 years old) were enrolled in the control group. All subjects accepted the colonoscopic biopsies, self-rating depression scale (SDS) and self-rating anxiety scale (SAS) assessment. MC degranulation, neuropeptide S (NPS), neuropeptide Y (NPY), NPY receptor 2 (NPY2R) and Protease-activated receptor 2 (PAR-2) in colon tissues were performed by Strept Avidin-Biot complex (SABC) immunohistochemistry. Enzyme-linked immunosorbent assay (ELISA) detection was used to test the expression of NPS and NPY in peripheral blood plasma and colon tissues. Western blot was applied to examine the level of NPY2R and PAR-2.Results: The level of anxiety and depression of patients with IBS-D was more serious than that in the control. The expression of NPS, NPY and NPY2R was down-regulated in the IBS-D. The total MC and tryptase-positive MC increased significantly in the colon tissue of IBS-D and the expression level of PAR-2 was significantly up-regulated.Conclusion: There has been a close connection among those indicators that the activated MC may up-regulate the function of PAR-2, resulting in the change of neuropeptide (NPS and NPY), successively leading to clinical symptoms and psychological negative changes in the IBS.Keywords: Irritable bowel syndrome, diarrhea, neuropeptide, protease-activated receptor 2, mast cell
