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Volume 38 Issue 9
Sep.  2022
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Article Navigation >  Journal of Clinical Hepatology  > 2022  >  38(9): 2099-2105

Changes and formation mechanism of plasma endothelial microparticles in patients with acute pancreatitis

DOI: 10.3969/j.issn.1001-5256.2022.09.027

  • Department of Gastroenterology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China

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  • Corresponding author: MEI Qiao, meiqiao@hotmail.com(ORCID: 0000-0002-0635-6564)
  • Received Date: 2022-01-17
  • Accepted Date: 2022-02-20
  • Published Date: 2022-09-20
    Abstract
  •   Objective  To investigate the changes and formation mechanism of plasma endothelial microparticles (EMPs) in patients with acute pancreatitis (AP).  Methods  Blood samples were collected from 60 patients with AP who were treated in The First Affiliated Hospital of Anhui Medical University from August 2020 to June 2021, and these patients were divided into mild acute pancreatitis (MAP) group with 23 patients, moderate-severe acute pancreatitis (MSAP) group with 23 patients, and severe acute pancreatitis (SAP) group with 14 patients; 20 individuals who underwent physical examination were enrolled as control group.Differential centrifugation was used to obtain platelet-poor plasma, flow cytometry was used to measure the level of CD31+CD41-EMPs, and ELISA was used to measure the levels of endothelin-1(ET-1), von Willebrand factor (vWF), nitric oxide (NO), and vascular cell adhesion molecule-1(VCAM-1).HUVECs were stimulated by the plasma of AP patients, and then flow cytometry and qRT-PCR were used to measure the changes in EMPs, reactive oxygen species (ROS), and mitochondrial membrane potential and the expression of endothelial nitric oxide synthase (eNOS), inducible nitric oxide synthase (iNOS), intercellular adhesion molecule-1(ICAM-1), VCAM-1, NADPH oxidase, and P-selectin.A one-way analysis of variance was used for comparison of normally distributed continuous data between multiple groups, and the least significant difference t-test was used for further comparison between two groups.The Kruskal-Wallis H test was used for comparison of non-normally distributed continuous data between groups and within each group.The chi-square test was used for comparison of categorical data between groups, and the Pearson correlation test was used for correlation analysis.  Results  Compared with the control group, the MAP, MSAP, and SAP groups had a significant increase in the level of EMPs (all P < 0.05).Compared with the MAP and MSAP groups, the SAP group had a significant increase in the level of EMPs (both P < 0.05).In the patients with AP, the level of EMPs was negatively correlated with Acute Physiology and Chronic Health Evaluation Ⅱ score, Bedside Index for Severity in Acute Pancreatitis, Ranson score, CT score, and C-reactive protein (r=0.686 2, 0.777 3, 0.713 8, 0.771 8, and 0.473 9, all P < 0.01).Compared with the control group, the MAP, MSAP, and SAP groups had significant increases in the levels of ET-1, vWF, and VCAM-1 and a significant reduction in the level of NO (all P < 0.05).Compared with the control group, the MSAP and SAP groups had the plasma that promoted the release of a large amount of EMPs (both P < 0.05).Compared with the control group, all the other groups, except the MAP group in terms of VCAM-1 and eNOS, had significant increases in the mRNA expression levels of eNOS, iNOS, ICAM-1, P-selectin, VCAM-1, and NADPH oxidase (all P < 0.05).Compared with the HC group, the MAP, MSAP, and SAP groups and the LPS group had a significant increase in the level of ROS and a significant reduction in mitochondrial membrane potential in HUVECs (all P < 0.05).  Conclusion  There is a significant increase in the plasma level of EMPs in AP patients, which is correlated with the severity of pancreatitis.Meanwhile, the plasma of AP patients can promote the formation of EMPs in HUVECs in vitro, which may be associated with cell oxidative injury.

     

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