TNF-α抑制剂对重症急性胰腺炎细胞凋亡及Caspase-3表达的影响

Impact of carbon dioxide pneumoperitoneum on the expression of nuclear factor kappa B p65, TNF-α, and IL-6 in human gastric cancer xenografts in a nude mouse model

AIM: To assess the impact of carbon dioxide (CO₂) pneumoperitoneum versus laparotomy on the expression of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and nuclear factor kappa B (NF-κB) in human gastric cancer xenografts in a nude mouse model.

METHODS: Nude mice were inoculated intraperitoneally with human gastric cancer cells (MKN45) to generate a xenograft mouse model of human gastric cancer. The model mice were randomly divided into three groups to undergo laparotomy, CO₂ pneumoperitoneum, and anesthesia alone, respectively. Tumor growth and expression of TNF-α, IL-6 expression and NF-κB in tumor xenografts were determined.

RESULTS: Total tumor weight was higher in mice undergoing laparotomy than in those undergoing CO₂ pneumoperitoneum (0.72 ± 0.02 vs 0.43 ± 0.06, P < 0.05). The mRNA expression levels of NF-κB p65, TNF-α, and IL-6 were significantly higher at 24 h after laparotomy than after CO₂ pneumoperitoneum (1.09 ± 0.12 vs 0.63 ± 0.07; 1.14 ± 0.11 vs 0.31 ± 0.05; 0.65 ± 0.08 vs 0.42 ± 0.04, all P < 0.05).

CONCLUSION: In a xenograft mouse model of human gastric cancer, CO₂ pneumoperitoneum resulted in slower tumor growth and lower expression levels of TNF-α, IL-6 and NF-κB p65 in tumor tissue than laparotomy, suggesting that laparoscopy is a minimally invasive technique in gastrointestinal oncologic surgery.