[No authors listed]
OBJECTIVE:To explore the effect of suppressor of cytokine signaling 3 (SOCS3) on the lung injury in rats with severe acute pancreatitis (SAP) by regulating the Janus kinase 2/signal transducer and activator of transcription 3 pathway. MATERIALS AND METHODS:Sprague-Dawley rats were divided into control group (n=20) and SAP model group (established via injection of 5% sodium taurocholate, n=40). Then, SOCS3 was overexpressed using the adenovirus in 20 rats in SAP model group. The serum amylase (AMY) was detected, whether the transfection was successful was verified via quantitative (qRT-PCR), the hepatic function indexes were detected, the pathological changes were observed using hematoxylin-eosin (HE) staining, and the wet/dry weight ratio (W/D) was calculated. Moreover, the content of serum inflammatory factors was detected via enzyme-linked immunosorbent assay (ELISA) and the expression levels of signaling pathway genes and proteins were detected through RT-PCR and Western blotting. RESULTS:The content of AMY in SAP model group was significantly increased, indicating the successful modeling. SOCS3 was significantly increased in transfection group, suggesting that the transfection efficiency was significant. The content of alanine aminotransferase (ALT), and aspartate aminotransferase (AST) in SOCS3 transfection group was significantly lower than in model group. According to the histopathological observation, there were lung injury, pulmonary edema, hemorrhage, severe inflammatory response, and alveolar congestion in SAP model group. There were almost no pathological changes in SOCS3 transfection group. In SOCS3 transfection group, the content of serum interleukin-6 (IL-6), IL-18 and tumor necrosis factor-α (TNF-α), the mRNA and protein expressions of IL-6, JAK2, and were all remarkably declined. CONCLUSIONS:SOCS3 inhibits the activation of the JAK2/duanyu18133 pathway and the increase of inflammatory factors, promoting the repair of lung injury in SAP rats.
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