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Yang K, Song Y, Su Y, Li C, Ding N. Establishment and Validation of an Early Predictive Model for Severe Acute Pancreatitis. J Inflamm Res 2024; 17:3551-3561. [PMID: 38855164 PMCID: PMC11162219 DOI: 10.2147/jir.s457199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 05/14/2024] [Indexed: 06/11/2024] Open
Abstract
Objective The purpose of this study is to establishment and validation of an early predictive model for severe acute pancreatitis (SAP). Methods From January 2015 to August 2022, 2986 AP patients admitted to Changsha Central Hospital were enrolled in this study. They were randomly divided into a modeling group (n = 2112) and a validation group (n = 874). In the modeling group, identify risk factors through logistic regression models and draw column charts. Use internal validation method to verify the accuracy of column chart prediction. Apply calibration curves to evaluate the consistency between nomograms and ideal observations. Draw a DCA curve to evaluate the net benefits of the prediction model. Results Nine variables including respiratory rate, heart rate, WBC, PDW, PT, SCR, AMY, CK, and TG are the risk factors for SAP. The column chart risk prediction model which was constructed based on these 9 independent factors has high prediction accuracy (modeling group AUC = 0.788, validation group AUC = 7.789). The calibration curve analysis shows that the prediction probabilities of the modeling and validation groups are consistent with the observation probabilities. By drawing a DCA curve, it shows that the model has a wide threshold range (0.01-0.88). Conclusion The study developed an intuitive nomogram containing readily available laboratory parameters to predict the incidence rate of SAP.
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Affiliation(s)
- Kongzhi Yang
- Department of Emergency Medicine, the Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, People’s Republic of China
| | - Yaqin Song
- Department of Emergency Medicine, the Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, People’s Republic of China
| | - Yingjie Su
- Department of Emergency Medicine, the Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, People’s Republic of China
| | - Changluo Li
- Department of Emergency Medicine, the Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, People’s Republic of China
| | - Ning Ding
- Department of Emergency Medicine, the Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, People’s Republic of China
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Xu M, Feng Y, Xiang X, Liu L, Tang G. MZB1 regulates cellular proliferation, mitochondrial dysfunction, and inflammation and targets the PI3K-Akt signaling pathway in acute pancreatitis. Cell Signal 2024; 118:111143. [PMID: 38508349 DOI: 10.1016/j.cellsig.2024.111143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 03/03/2024] [Accepted: 03/14/2024] [Indexed: 03/22/2024]
Abstract
BACKGROUND Acute pancreatitis (AP) is a pathological condition characterized by the premature release and activation of trypsinogens and other enzyme precursors. In severe cases, the mortality rates are in the range of 20-30% and may even be as high as 50%. Though various prophylaxes are available for AP, the mechanism of its progression is unclear. Marginal zone B and B-1 cell-specific protein 1 (MZB1) is found in the endoplasmic reticulum (ER) where it is expressed exclusively in the B cells there. MZB1 promotes proliferation, inhibits apoptosis, invasion, and inflammation, and mitigates mitochondrial damage in cells. However, the importance of MZB1 in AP has not yet been determined. METHODS Differentially expressed genes (DEGs) between healthy pancreatic cells and those affected by AP were identified using datasets from Gene Expression Omnibus (GEO) datasets. Relative differences in MZB1 expression between normal and diseased tissues and cells were validated in vivo using a rat AP model induced with 4% (w/v) sodium taurocholate and in vitro using the AR42J rat pancreatic cell line exposed to caerulein (CAE). Cell Counting Kit-8 (CCK-8) and 5-ethynyl-2`-deoxyuridine (EdU) assays were performed to detect and compare normal and pathological cell proliferation. Flow cytometry was employed to assess and compare cellular apoptosis. Quantitative reverse transcription polymerase chain reaction (qRT-PCR) and western blot (WB) were applied to evaluate the apoptotic factors Bax and Bcl. The inflammatory factors interleukin (IL)-6 and IL-1β were quantified using Enzyme-linked immunosorbent assay (ELISA) and qRT-PCR techniques. Mitochondrial function was evaluated using assays for reactive oxygen species (ROS) and tetramethylrhodamine methyl ester (TMRM). WB and qRT-PCR were utilized to measure the expression levels of the PI3K-Akt signaling pathway, followed by a rescue experiment involving the inhibitor of wortmannin. RESULTS MZB1 was upregulated in the AP cases screened from the GEO datasets, the rat AP model, and the AR42J cells exposed to CAE. Overexpression of MZB1 enhanced the growth and supressed the cell death of AR42J cells while also activating the PI3K-Akt signaling pathway. MZB1 knockdown led to mitochondrial dysfunction and exacerbated inflammation. The rescue experiment demonstrated that MZB1 enhanced proliferation and inhibited apoptosis, mitochondrial dysfunction, and inflammation in pancreatic cells through the PI3K-Akt pathway. CONCLUSIONS AP cells and tissues exhibited markedly elevated levels of MZB1 expression compared to their healthy counterparts. MZB1 overexpression promoted proliferation and supressed apoptosis, mitochondrial dysfunction, and inflammation in pancreatic cells through the positive regulation of the PI3K-Akt signaling pathway.
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Affiliation(s)
- Mengtao Xu
- Department of Gastroenterology, First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, Guangxi, China.
| | - Yong Feng
- Department of Gastroenterology, First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, Guangxi, China
| | - Xuelian Xiang
- Department of Gastroenterology, First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, Guangxi, China
| | - Li Liu
- Department of Gastroenterology, First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, Guangxi, China
| | - Guodu Tang
- Department of Gastroenterology, First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, Guangxi, China.
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Chen YY, Hu LY, Zhang K, Zhang XP, Cao Y, Yang L, Wu BB, Zhou WH, Wang J. [A case of neonatal-onset type I hyperlipoproteinemia with bloody ascites]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2023; 25:1293-1298. [PMID: 38112150 PMCID: PMC10731962 DOI: 10.7499/j.issn.1008-8830.2307113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 10/11/2023] [Indexed: 12/20/2023]
Abstract
This report presents a case of a male infant, aged 32 days, who was admitted to the hospital due to 2 days of bloody stools and 1 day of fever. Upon admission, venous blood samples were collected, which appeared pink. Blood biochemistry tests revealed elevated levels of triglycerides and total cholesterol. The familial whole genome sequencing revealed a compound heterozygous variation in the LPL gene, with one variation inherited from the father and the other from the mother. The patient was diagnosed with lipoprotein lipase deficiency-related hyperlipoproteinemia. Acute symptoms including bloody stools, fever, and bloody ascites led to the consideration of acute pancreatitis, and the treatment involved fasting, plasma exchange, and whole blood exchange. Following the definitive diagnosis based on the genetic results, the patient was given a low-fat diet and received treatment with fat-soluble vitamins and trace elements, as well as adjustments to the feeding plan. After a 4-week hospitalization, the patient's condition improved and he was discharged. Follow-up showed a decrease in triglycerides and total cholesterol levels. At the age of 1 year, the patient's growth and psychomotor development were normal. This article emphasizes the multidisciplinary diagnosis and treatment of familial hyperlipoproteinemia presenting with symptoms suggestive of acute pancreatitis, including bloody ascites, in the neonatal period.
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Affiliation(s)
- Yuan-Yuan Chen
- Department of Neonatology, Children's Hospital of Fudan University/National Children's Medical Center, Shanghai 201102, China (Wang J, . cn)
| | - Li-Yuan Hu
- Department of Neonatology, Children's Hospital of Fudan University/National Children's Medical Center, Shanghai 201102, China (Wang J, . cn)
| | - Ke Zhang
- Department of Neonatology, Children's Hospital of Fudan University/National Children's Medical Center, Shanghai 201102, China (Wang J, . cn)
| | - Xue-Ping Zhang
- Department of Neonatology, Children's Hospital of Fudan University/National Children's Medical Center, Shanghai 201102, China (Wang J, . cn)
| | - Yun Cao
- Department of Neonatology, Children's Hospital of Fudan University/National Children's Medical Center, Shanghai 201102, China (Wang J, . cn)
| | | | | | - Wen-Hao Zhou
- Department of Neonatology, Children's Hospital of Fudan University/National Children's Medical Center, Shanghai 201102, China (Wang J, . cn)
| | - Jin Wang
- Department of Neonatology, Children's Hospital of Fudan University/National Children's Medical Center, Shanghai 201102, China (Wang J, . cn)
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Li G, Liu L, Lu T, Sui Y, Zhang C, Wang Y, Zhang T, Xie Y, Xiao P, Zhao Z, Cheng C, Hu J, Chen H, Xue D, Chen H, Wang G, Kong R, Tan H, Bai X, Li Z, McAllister F, Li L, Sun B. Gut microbiota aggravates neutrophil extracellular traps-induced pancreatic injury in hypertriglyceridemic pancreatitis. Nat Commun 2023; 14:6179. [PMID: 37794047 PMCID: PMC10550972 DOI: 10.1038/s41467-023-41950-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 09/21/2023] [Indexed: 10/06/2023] Open
Abstract
Hypertriglyceridemic pancreatitis (HTGP) is featured by higher incidence of complications and poor clinical outcomes. Gut microbiota dysbiosis is associated with pancreatic injury in HTGP and the mechanism remains unclear. Here, we observe lower diversity of gut microbiota and absence of beneficial bacteria in HTGP patients. In a fecal microbiota transplantation mouse model, the colonization of gut microbiota from HTGP patients recruits neutrophils and increases neutrophil extracellular traps (NETs) formation that exacerbates pancreatic injury and systemic inflammation. We find that decreased abundance of Bacteroides uniformis in gut microbiota impairs taurine production and increases IL-17 release in colon that triggers NETs formation. Moreover, Bacteroides uniformis or taurine inhibits the activation of NF-κB and IL-17 signaling pathways in neutrophils which harness NETs and alleviate pancreatic injury. Our findings establish roles of endogenous Bacteroides uniformis-derived metabolic and inflammatory products on suppressing NETs release, which provides potential insights of ameliorating HTGP through gut microbiota modulation.
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Affiliation(s)
- Guanqun Li
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China
| | - Liwei Liu
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China
| | - Tianqi Lu
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China
| | - Yuhang Sui
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China
| | - Can Zhang
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China
| | - Yongwei Wang
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Tao Zhang
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Yu Xie
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Peng Xiao
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Zhongjie Zhao
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Chundong Cheng
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Jisheng Hu
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China
| | - Hongze Chen
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China
| | - Dongbo Xue
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Hua Chen
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Gang Wang
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Rui Kong
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China
| | - Hongtao Tan
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Xuewei Bai
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Zhibo Li
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Florencia McAllister
- Department of Clinical Cancer Prevention, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Clinical Cancer Genetics Program, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Le Li
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China.
| | - Bei Sun
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, Harbin, 150001, China.
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Wei B, Su Z, Yang H, Feng Y, Meng C, Liang Z. Inhibition of TRAF6 improves hyperlipidemic acute pancreatitis by alleviating pyroptosis in vitro and in vivo rat models. Biol Direct 2023; 18:23. [PMID: 37165439 PMCID: PMC10170794 DOI: 10.1186/s13062-023-00380-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 05/01/2023] [Indexed: 05/12/2023] Open
Abstract
OBJECTIVE Hypertriglyceridemia (HTG) is one of the common causes of acute pancreatitis (AP). Hyperlipidemic acute pancreatitis (HTG-AP) is associated with higher mortality owing to its tendency for greater severity and rapid progression. The purpose of this study was to explore the mechanism of involvement of tumor necrosis factor receptor-related factor 6 (TRAF6) in pyroptosis during HTG-AP. METHODS The HTG environment was simulated with palmitic acid treatment in vitro and a high-fat diet in vivo. Cerulein was used to establish the HTG-AP model, followed by genetic and pharmacological inhibition of TRAF6. Pyroptosis activation, inflammatory reaction, and the interaction between TRAF6 and pyroptosis in HTG-AP were assessed. RESULTS HTG was found to aggravate the development of pancreatitis, accompanied by increased pyroptosis and enhanced inflammatory response in HTG-AP models. Mechanistically, TRAF6 downregulation decreased the activation of pyroptosis in cerulein-induced HTG-AP. CONCLUSION Collectively, inhibition of TRAF6 improved HTG-AP and the associated inflammation by alleviating pyroptosis.
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Affiliation(s)
- Biwei Wei
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, No. 6 Shuangyong Road, 530021, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Zhou Su
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, No. 6 Shuangyong Road, 530021, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Huiying Yang
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, No. 6 Shuangyong Road, 530021, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Yong Feng
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, No. 6 Shuangyong Road, 530021, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Chunmei Meng
- Life Sciences Institute, Guangxi Medical University, Nanning, China
| | - Zhihai Liang
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, No. 6 Shuangyong Road, 530021, Nanning, Guangxi Zhuang Autonomous Region, China.
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Deng W, Wang M, Li D, Wang Q, Liu L, Cai C. Analysis of influencing factors of low molecular weight heparin calcium and pancreatic endocrine function in patients with acute pancreatitis. Minerva Gastroenterol (Torino) 2022; 68:349-352. [PMID: 35112819 DOI: 10.23736/s2724-5985.21.02966-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Weihua Deng
- Department of Emergency, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
| | - Mingyang Wang
- Department of Emergency, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
| | - Dezhong Li
- Department of Emergency, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
| | - Qibing Wang
- Department of Emergency, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
| | - Liu Liu
- Department of Pediatrics, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, China
| | - Changsong Cai
- Department of General Surgery, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, China -
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Lv YC, Yao YH, Wu DB, Lei JJ. Value of BISAP score for predicting severity of hyperlipidemic acute pancreatitis: A meta-analysis. Shijie Huaren Xiaohua Zazhi 2022; 30:710-717. [DOI: 10.11569/wcjd.v30.i16.710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Early identification of hyperlipidemic acute pancreatitis (HLAP) patients at risk of developing potentially lethal complications is of great clinical significance. Studies have suggested that the bedside index for in acute pancreatitis (BISAP) score is associated with adverse outcomes.
AIM To assess the accuracy of BISAP score as a prognostic marker for severity of HLAP.
METHODS A systematic search of main computerized databases was performed to identify eligible cohort studies on the predictive value of BISAP score for severity of HLAP. The STATA software and Meta-disc software were applied to carry out the meta-analysis.
RESULTS Ten studies (n = 1591) were included. The overall sensitivity and specificity of BISAP score ≥ 3 for predicting mortality in HLAP were 0.85 (95% confidence interval [CI]: 0.65-0.96) and 0.86 (95%CI: 0.82-0.88), respectively; the area under the curve (AUC) was 0.937, and the diagnostic odds ratio (DOR) was 42.00 (95%CI: 12.86-139.12). Regarding the increase of BISAP score for prediction of severe acute pancreatitis (SAP), the pooled sensitivity was 0.69 (95%CI: 0.61-0.76), and the specificity was 0.82 (95%CI: 0.78-0.85), with AUC and DOR being 0.900 and 18.47 (95%CI: 6.82-42.03), respectively. The pooled sensitivity, specificity, and DOR for prediction of moderately severe acute pancreatitis (MASP) + SAP were 0.54 (95%CI: 0.50-0.63), 0.91 (95%CI: 0.89-0.93), and 15.55 (95%CI: 6.91-34.99), respectively; the AUC was 0.724. BISAP score was superior to APACH Ⅱ and Ranson score in predicting the severity of HLAP.
CONCLUSION BISAP score is a reliable tool to identify the severity of HLAP, but it has a suboptimal sensitivity for predicting SAP and SAP + MSAP.
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Affiliation(s)
- Yong-Cai Lv
- Department of Gastroenterology, Zhenning Buyi and Miao Autonomous County People's Hospital, Zhenning 561200, Guizhou Province, China
| | - Yan-Hua Yao
- Department of Ultrasound, Zhenning Buyi and Miao Autonomous County Traditional Chinese Hospital, Zhenning 561200, Guizhou Province, China
| | - De-Biao Wu
- Department of Gastroenterology, Zhenning Buyi and Miao Autonomous County People's Hospital, Zhenning 561200, Guizhou Province, China
| | - Jing-Jing Lei
- Department of Geriatric Medicine, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
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Yang HY, Liang ZH, Xie JL, Wu Q, Qin YY, Zhang SY, Tang GD. Gelsolin impairs barrier function in pancreatic ductal epithelial cells by actin filament depolymerization in hypertriglyceridemia‑induced pancreatitis in vitro. Exp Ther Med 2022; 23:290. [PMID: 35317441 PMCID: PMC8908475 DOI: 10.3892/etm.2022.11219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 01/25/2022] [Indexed: 11/23/2022] Open
Abstract
Gelsolin (GSN) is a calcium-regulated actin-binding protein that can sever actin filaments. Notably, actin dynamics affect the structure and function of epithelial barriers. The present study investigated the role of GSN in the barrier function of pancreatic ductal epithelial cells (PDECs) in hypertriglyceridemia-induced pancreatitis (HTGP). The human PDEC cell line HPDE6-C7 underwent GSN knockdown and was treated with caerulein (CAE) + triglycerides (TG). Intracellular calcium levels and the actin filament network were analyzed under a fluorescence microscope. The expression levels of GSN, E-cadherin, nectin-2, ZO-1 and occludin were evaluated by reverse transcription-quantitative polymerase chain reaction and western blotting. Ultrastructural changes in tight junctions were observed by transmission electron microscopy. Furthermore, the permeability of PDECs was analyzed by fluorescein isothiocyanate-dextran fluorescence. The results revealed that CAE + TG increased intracellular calcium levels, actin filament depolymerization and GSN expression, and increased PDEC permeability by decreasing the expression levels of E-cadherin, nectin-2, ZO-1 and occludin compared with the control. Moreover, changes in these markers, with the exception of intracellular calcium levels, were reversed by silencing GSN. In conclusion, GSN may disrupt barrier function in PDECs by causing actin filament depolymerization in HTGP in vitro.
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Affiliation(s)
- Hui-Ying Yang
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
| | - Zhi-Hai Liang
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
| | - Jin-Lian Xie
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
| | - Qing Wu
- Department of Gastroenterology, The Second Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530007, P.R. China
| | - Ying-Ying Qin
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
| | - Shi-Yu Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
| | - Guo-Du Tang
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
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Yang G, Zhang X. Trimethylamine N-oxide promotes hyperlipidemia acute pancreatitis via inflammatory response. Can J Physiol Pharmacol 2022; 100:61-67. [PMID: 34793682 DOI: 10.1139/cjpp-2021-0421] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Trimethylamine N-oxide (TMAO), a metabolite of gut microbiota, is involved in the regulation of lipid metabolism and inflammatory response; however, the role of TMAO in hyperlipidemia acute pancreatitis (HAP) is not clear. In this study, HAP mice were used as an animal model to explore the effects and possible mechanism of TMAO on HAP, which may provide new ideas for the treatment of HAP. Results found that the levels of triglycerides, total cholesterol, low-density lipoprotein cholesterol, nonestesterified fatty acid, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, α-amylase, TMAO, and flavin-containing monooxygenase 3 were significantly increased, the levels of high-density lipoprotein cholesterol and insulin were significantly decreased, and there was an obvious pancreatic injury and inflammatory response in the model group. The choline analogue 3,3-dimethyl-1-butanol (DMB) treatment reversed the changes of serum biochemical parameters, alleviated the pancreatic tissue injury, and reduced the levels of inflammatory cytokines. Further studies of toll-like receptor (TLR)/p-glycoprotein 65 (p65) pathway found that the expressions of TLR2, TLR4, and p-p65/p65 in the model group were significantly increased, which was more obvious after Escherichia coli (Migula) Castellani & Chalmers treatment, while activation of the TLR/p65 pathway was inhibited by DMB. The results indicated that TMAO promotes HAP by promoting inflammatory response through TLR/p65 signaling pathway, suggesting that TMAO may be a potential target of HAP.
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Affiliation(s)
- Guodong Yang
- Department of Gastroenterology and Hepatology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, China
| | - Xiaoying Zhang
- School of Basic Medicine, North Sichuan Medical College, Nanchong, Sichuan 637000, China
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