Role of the c-Jun N-terminal kinase signaling pathway in the activation of trypsinogen in rat pancreatic acinar cells

Abstract

Bile acid causes trypsinogen activation in pancreatic acinar cells through a complex process. Additional research is required to further elucidate which signaling pathways affect trypsinogen activation when activated. the changes in the whole‑genome expression profile of AR42J cells under the effect of taurolithocholic acid 3‑sulfate (TLC‑S) were investigated. Furthermore, gene groups that may play a regulatory role were analyzed using the modular approach of biological networks. The aim of the present study was to improve our understanding of the changes in TLC‑S‑stimulated AR42J cells through a genetic functional modular analysis. whole‑genome expression profile chip arrays were applied to detect genes that were differentially expressed in pancreatic acinar AR42J cells treated with TLC‑S for 20 min. Based on the human protein reference database, a protein‑protein interaction network was obtained, which was then processed by CFinder software to derive 14 modules. Among these 14 modules, the gene ontology biological processes enrichment analysis identified two as modules of interest. Kyoto encyclopedia of genes and genomes map analysis revealed that MAP2K4, MAPK8 and FLNA are part of the c-Jun N-terminal kinase (JNK) pathway. The JNK signaling pathway is involved in regulating trypsinogen activation in rat pancreatic AR42J cells. Next, a regulatory network of seven kinase inhibitors was constructed. SP600125 is an ATP‑competitive, efficient, selective and reversible inhibitor of JNK. the results were verified by four sets of experiments and demonstrated that trypsinogen activation is mediated by the JNK signaling pathway in the pathogenesis of acute pancreatitis (AP). The present study provided a useful reference for better understanding the pathogenesis of AP and identifying new targets to regulate trypsinogen activation, in addition to providing valuable information for the treatment of AP.

Influenza A Virus Nucleoprotein Activates the JNK Stress-Signaling Pathway for Viral Replication by Sequestering Host Filamin A Protein

“…Due to the involvement of FLNA in the stress-signaling pathway (Nomachi et al, 2008;Külshammer and Uhlirova, 2012;Yang et al, 2018), we were interested in further ascertaining the role of FLNA in the JNK stress-signaling pathway in the presence and absence of IAV NP. To this end, we first transfected HEK293 cells with NP(PR8) in a dose-dependent manner and subsequently processed the cells at 24 h post-transfection for quantification of the protein expression levels of JNK and its downstream effectors.…”

Effects of Egr1 on pancreatic acinar intracellular trypsinogen activation and the associated ceRNA network

“…The rat pancreatic acinar ar42J cells were obtained from the china center for Type culture collection (Wuhan, china) and cultured in F12K medium (Sigma-aldrich; Merck KGaa) supplemented with 10% fetal bovine serum (Gibco; Thermo Fisher Scientific, Inc.) and 100 U/ml penicillin/streptomycin (Beyotime institute of Biotechnology) in a 5% co 2 environment at 37˚C. A total of 200 µM TLC-S (Sigma-Aldrich; Merck KGaa) was used to treat ar42J cells for 40 min at 37˚C to establish the PAITA cell model as previously described (21,22).…”