Application of plasma prostate electrovaporization system in the treatment of rectal cicatricial stenosis / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To evaluate the feasibility, maneuver and efficacy of plasma prostate electrovaporization system in the treatment of rectal cicatricial stenosis.</p><p><b>METHODS</b>According to similar procedure of transurethral resection prostate(TURP), intrarectal cicatriclectomy was performed with plasma prostate electrovaporization system in 7 patients with rectal low cicatricial stenosis after rectal cancer treatment (5 patients with transabdominal low anterior resection,2 patients with 3-dimension precise radiotherapy) to remove obstruction and dilate enteric cavity.</p><p><b>RESULTS</b>Seven patients underwent 12 operations, including one operation in 3 patients, two operations in 3 patients, 3 operations in one patient. Resected rectal cicatricial tissue ranged from 5 to 15 g. Mean operation time was 41 min (25 to 40). Operation successful rate was 100% without complications such as perforation, bleeding and infection. All the patients had smooth defecation.</p><p><b>CONCLUSION</b>Plasma prostate electrovaporization system is an effective treatment for rectal cicatricial stenosis with tiny trauma.</p>

Investigation of the mechanisms of coagulation factor VIIa-induced colon cancer SW620 cell proliferation and migration / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the mechanisms that coagulation factor VIIa promotes proliferation and migration of a colon cancer cell line (SW620 cells) in vitro.</p><p><b>METHODS</b>The expression of interleukin 8 (IL-8), tissue factor (TF), caspase-7 and p-p38 MAPK in SW620 cells treated with factor VIIa or protease activated receptor 2 agonist (PAR2-AP) was measured by ELISA, Western-blotting and QT-PCR.</p><p><b>RESULTS</b>Factor VIIa and PAR2-AP induced IL-8 expression at both mRNA and protein levels, upregulated TF mRNA expression and TF activity, but down-regulated caspase-7 mRNA and p-p38 MAPK levels in SW620 cells. The effects of factor VIIa were not only blocked by anti-TF but also by anti-PAR2 antibodies.</p><p><b>CONCLUSION</b>Factor VIIa binds to TF on cell surface, forming a complex which activates PAR2, then provoking IL-8 and TF expression, and suppresses caspase-7 expression, thus promotes the tumor cell proliferation and migration. p38 MAPK may negatively regulate this process.</p>