Therapeutic effects of silencing fibrinogen-like protein 2 gene on acute necrotizing pancreatitis mice / 中华胰腺病杂志

ABSTRACT

Objective To investigate the therapeutic effect of silencing fibrinogen-like protein 2 (FGL2) gene on acute necrotic pancreatitis (ANP) mice.Methods Eighteen C57/BL mice were randomly divided into SO (sham operation) group,ANP group and Ad-FGL2-siRNA group carrying FGL2 siRNA adenovirus,with 6 in each group.Sodium taurocholate was retrogradely injected into the biliopancreatic ducts of the mice to induce ANP mice model.The mice in Ad-FGL2-siRNA group were injected intravenously in the tail vein with Ad-FGL2-siRNA befor the model establishment.The mice were sacrificed 6 h later,and then the pancreatic tissue and blood were collected.TNF-α and IL-1β expression were measured with ELISA,pancreatic tissue was examined with routine pathological examination,FGL2 mRNA and protein expression were measured with reverse transcription-PCR,western blotting and immunohistochemical staining,and cell apoptosis was assessed by TUNEL method.Results The pathological score of the pancreatic tissue in SO group,ANP group and Ad-FGL2-miRNA group was(1.33 ±0.21),(9.17 ±0.98) and (6.26 ±0.52),respectively.The serum TNF-α level in SO group,ANP group and Ad-FGL2-miRNA group was(63.8 ± 4.2),(240.4 ± 18.6)and(123.0 ± 10.3)ng/L,respectively.The serum IL-1β level was (43.6 ±4.4),(186.6 ± 18.7)and (92 ±10.9)ng/L.The mRNA expressions of FGL2 was 1.20 ±0.22,4.40 ± 1.21 and 2.15 ± 0.56.The protein expressions of FGL2 was 0.33 ± 0.08,1.23 ± 0.24 and 0.68 ± 0.09.The rate of FGL2 positive cells was (2.56 ± 0.31) ％,(15.10 ± 3.23) ％ and (8.68 ± 1.81) ％.The number of apoptotic cells was (4.51 ±1.21),(35.81 ± 4.11) and (11.79 ± 3.02) / × 200HPF,which in the ANP group was higher than that in SO group,and in the Ad-FGL2-siRNA group was significantly lower than that in ANP group and higher than that in SO group.All the differences were statistically significant (all P values ＜ 0.05),except that on the FGL2 mRNA expression between Ad-FGL2-siRNA group and SO group.Conclusions Silencing FGL2 gene may alleviate pancreatic injury in ANP by reducing the release of inflammatory factors and inhibiting cell apoptosis.