4.7 Article

Limonin ameliorates acute pancreatitis by suppressing JAK2/STAT3 signaling pathway

Journal

ENVIRONMENTAL TOXICOLOGY
Volume 36, Issue 12, Pages 2392-2403

Publisher

WILEY
DOI: 10.1002/tox.23352

Keywords

acute pancreatitis; caerulein-induced; JAK2; limonin; STAT3

Funding

  1. Clinical trial ability improvement of digestive specialty group in the First Affiliated Hospital of Soochow University [201900180024]

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Research has shown that limonin has protective effects on acute pancreatitis by reducing the levels of inflammation initiators and modulating the JAK2/STAT3 signaling pathway.
Acute pancreatitis (AP) is one of the most common acute abdomen of digestive system and has the characteristics of dangerous condition and rapid development. Limonin has been confirmed to hold anti-inflammatory and antioxidant effects in various diseases. However, its potential beneficial effect on AP and the concrete mechanisms have never been revealed. Here, two mouse models were used to investigate the protective effects of limonin on AP, the caerulein-induced mild acute pancreatitis (MAP) model and L-arginine-induced severe AP (SAP) model. Firstly, it was found that limonin administration attenuated lipase and serum amylase levels and ameliorated the histopathological manifestations of pancreatic tissue in a dose-dependent manner. Additionally, the amelioration of AP by limonin was associated with reduced levels of inflammation initiators (IL-6, IL-1 beta, CCL2, and TNF-alpha). Mechanistically, we found that limonin suppressed the Janus Activating Kinase 2 (JAK2)/Signal Transducer and Activator of Transcription 3 (STAT3) signaling pathway, as evident by the decreased levels of JAK2 and p-STAT3. And activation of JAK2 using JAK2 activator rescued the protective effects of limonin on AP. Thus, our results demonstrate that limonin can ameliorate AP in two mice models via suppressing JAK2/STAT3 signaling pathway.

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