Abstract:
BACKGROUND:Regenerating islet-derived 3 (Reg3) is abnormally expressed in several human digestive system diseases, including chronic pancreatitis (CP) and pancreatic cancer (PC). AIM:The purpose of this study was to clarify the mechanism of the enhanced expression of Reg3 in inflammation-induced PC. METHODS:C57BL/6 mice were treated with caerulein for 6 weeks to induce CP and then injected with pReg3g--a lentivirus system encoding for murine Reg3g--accompanied by dimethylbenzanthracene to induce PC. We detected pancreatic histopathological characteristics, tumor-related gene expression, inflammation-associated pathway activation, serum biochemical indicators, and immunological cell activities. RESULTS:The mice that developed CP after caerulein treatment were marked by pronounced histologic lesions, elevated serum amylase levels, and activation of inflammation-related pathways. Mice given a high dose of pReg3g developed PC by 16 weeks, with recognizable tumors in the pancreas. While, both the low and high doses of pReg3g produced higher transcription of c-fos, k-ras, cytokeratin-19, and proliferating cell nuclear antigen, and a lower expression of caspase-3 compared to pNEG controls. Additionally, the higher dose of pReg3g increased the expressions of pSTAT3, NFκB (p65), and SOCS3 methylation during PC development. In addition, mice treated with pReg3g displayed higher levels of serum IL10 and TGFβ and suppressed T lymphocyte proliferation and DC function. CONCLUSION:The comprehensive analysis suggests enhanced Reg3g expression exacerbates PC in inflammation-associated cancer progression. Reg3g appears to promote CP-related PC in mice through multiple mechanisms, involving enhanced transcription of pancreatic tumor markers, repression of anti-tumor immunity, and activation of STAT3/p65 signal transduction pathways.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Yin G,Du J,Cao H,Liu X,Xu Q,Xiang Mdoi
10.1007/s10620-015-3787-5subject
Has Abstractpub_date
2015-12-01 00:00:00pages
3656-68issue
12eissn
0163-2116issn
1573-2568pii
10.1007/s10620-015-3787-5journal_volume
60pub_type
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