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25 May 2019 : Animal Research  

The Effects of Lycium Barbarum Polysaccharide (LBP) in a Mouse Model of Cerulein-Induced Acute Pancreatitis

Gao-Fei Xiong1ABCDEFG, Dong-Wei Li2BCDEF, Ming-Bin Zheng3CDF, Si-Chun Liu1A*

DOI: 10.12659/MSM.913820

Med Sci Monit 2019; 25:3880-3886


BACKGROUND: Acute pancreatitis is an inflammatory disease of the pancreas associated with high patient morbidity. Lycium barbarum polysaccharide (LBP), a traditional Chinese medicine with an active component extracted from the goji berry, has previously been reported to have anti-inflammatory effects. This study aimed to investigate the effects of LBP in a mouse model of cerulein-induced acute pancreatitis.

MATERIAL AND METHODS: Acute pancreatitis was induced by intraperitoneal injection of cerulein in C57BL/6 wild-type mice or nuclear factor erythroid-2-related factor 2 (NRF2) gene knockout mice. LBP or normal saline was administrated by gavage once daily for one week before the induction of acute pancreatitis. At 12 hours after the first intraperitoneal injection of cerulein, the mice were euthanized. Blood and pancreatic tissue were sampled for histology and for the measurement of pro-inflammatory cytokines, serum amylase, and lipase.

RESULTS: In the untreated mouse model of cerulein-induced acute pancreatitis, amylase and lipase levels were increased, and these levels were reduced by LBP treatment when compared with vehicle treatment. In the untreated mouse model, histology of the pancreas showed edema and inflammation, which were reduced in the LBP-treated mice. In the untreated mouse model, increased levels of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were found, which were reduced in the LBP-treated mice. NRF2 gene knockout mice with cerulein-induced acute pancreatitis showed reduced anti-inflammatory effects of LBP treatment. LBP increased the expression of NRF2 and heme oxygenase-1 (HO-1).

CONCLUSIONS: In a mouse model of cerulein-induced acute pancreatitis, LBP reduced inflammation by upregulating NRF2 and HO-1.

Keywords: Nuclear Respiratory Factor 1, amylases, Ceruletide, Cytokines, Drugs, Chinese Herbal, Heme Oxygenase-1, Interleukin-6, Lipase, NF-E2-Related Factor 2, Pancreas

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750