ABSTRACT
Objective:We aimed to investigate the clinical efficacy of neoadjuvant chemotherapy combined with cytoreductive surgery and intraperitoneal hyperthermic chemoperfusion (IHCP) after the operation of patients with advanced ovarian cancer. Meth-ods:Analysis of 60 patients with advanced ovarian cancer was performed at the Zhengzhou People's Hospital from April 2009 to July 2012. The patients were divided into two groups, namely, the research and control groups. The research group was treated with neoadju-vant chemotherapy combined with cytoreductive surgery and IHCP twice (cisplatin at 80 mg), and subsequently, with chemotherapy (TC/TP). The control group underwent primary cytoreductive surgery and chemotherapy (TC/TP). We compared the differences be-tween the two groups in terms of the following parameters:operation time, bleeding volume, volume of ascites, and postoperative che-motherapy. Results:The treatments in the research group were more efficient than those performed on the control group in terms of all the intraoperative indicators, and the difference between the two groups was statistically significant (P<0.05). Conclusion:Compared with conventional methods, the neoadjuvant chemotherapy combined with cytoreductive surgery and IHCP after operation was more ef-fective for patients with advanced ovarian cancer. Thus, neoadjuvant chemotherapy combined with cytoreductive surgery and IHCP af-ter operation can be applied in clinical settings.
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ObjectiveTo investigate the role of NF-κB signaling pathway in the spinal cord in persistent postoperative pain evoked by skin/muscle incision and retraction (SMIR) in rats.MethodsNinety male SD rats weighing 200-250 g in which intrathecal (IT) catheter was successfully implanted without complication were randomly divided into 3 groups ( n =30 each):group sham operation ( group S ) ; groups SMIR and group pyrrolidine dithiocarbarnate (a NF-κB inhibitor) (group PDTC).Persistent postoperative pain was evoked by SMIR according to the method described by Flatters in groups SMIR and PDTC.PDTC 10 ng in 10 μl was injected IT over 30 s once a day for 7 consecutive days after operation in group PDTC.Mechanical paw withdrawal threshold to von Frey filament stimulation (MWT) was measured at 1 d before (T0,baseline) and 1,3,7,12 and 22 d after surgery (T1-5).Five animals in each group were sacrificed at each time point after MWT measurement and their lumbar segments of the spinal cord were removed for determination of TNF-α content (by ELISA).ResultsSMIR significantly decreased MWT after operation at T1-5 and increased TNF-α content in the spinal cord at T3-5.PDTC significantly attenuated SMIR-induced hyperalgesia and increase in TNF-α content in the spinal cord.Conclusion NF-κB signaling pathway in the spinal cord plays an important role in the development of SMIR-induced persistent postoperafive pain in rats.
ABSTRACT
Objective To investigate the glial activation in the spinal cord in a rat model of persistent postoperative pain. Methods Forty-eight adult male SD rats weighing 200-250 g were randomly divided into 2 groups ( n = 24 each): group Ⅰ sham operation (group S) and group Ⅱ persistent postoperative pain. Persistent postoperative pain was evoked by skin/muscle incision and retraction (SMIR) as described by Flatters. Pawwithdrawal threshold to yon Frey hair stimulation was measured before operation (baseline) and at 1, 3, 12, 22and 32 d after establishment of the model. Four animals were sacrificed at each time point and lumbar segment of the spinal cord was removed for determination of expression of glial fibrillary acidic protein (GFAP) in the astrocytes by immunofluorescence histo-chemistry assay. Results The mechanical threshold started to decrease at 1 d after establishment of the model, and peaked at 12 d after establishment of the mode. Immunofluorescence histochemistry assay demonstrated that GFAP expression in the dorsal horn was significantly increased at 3 d after estabhshment of the model and reached the peak at 12 d and was maintained at the high level until 22 d after establishment of the model. Conclusion Glial activation is involved in the mechanism of persistent postoperative pain evoked by SMIR.