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Objective@#To investigate the correlation between c-kit mRNA expression and prognosis in patients with rectal carcinoma.@*Methods@#The expression of c-kit mRNA in rectal carcinoma tissues(n=66) was detected by multiplex branched-DNA liquid chip method. According to the expression level, the patients were classified into the c-kit mRNA high expression group and the low group. We analyzed the relationship between the c-kit mRNA expression and the clinicopathological characteristics of patients, as well as the factors affecting patients′prognosis.@*Results@#Of the 66 rectal carcinoma patients, 18(27.3%)cases were c-kit mRNA high expression. No significant correlation was found between the c-kit mRNA expression and gender, age, preoperative carcinoembryonic antigen, preoperative hemoglobin, distance to verge, lymph node metastasis, tumor thrombus, T stage, TNM stage and tumor differentiation (P>0.05). In follow-up, 34 patients died, 32 patients and 36 patients were recurrence or metastasis. The 1-, 3-, 5-year overall survival(OS) of c-kit mRNA high expression group were 100.0%, 77.8%, 77.8%, respectively, while those of the low one were 93.8%, 56.3%, 45.8%, respectively. The difference was statistically significant(P=0.025). Lymph node metastasis, T stage and TNM stage were also significant associated with OS(P<0.05). The 1-, 3-, 5-year disease free rate (DFS)of the c-kit mRNA high expression group were 100.0%, 77.8% and 77.8%, respectively, while those of the low one were 77.1%、43.8% and 41.7%, respectively, and the difference between the two groups was significant (P=0.044). As a reslut, c-kit mRNA expression (P=0.038) and TNM stage (P=0.039) were the independent prognostic factors affecting the OS in rectal cancer patients.@*Conclusions@#Low expression of c-kit was associated with poor prognosis of rectal carcinoma. And the mechanism underlying this phenomenon deserves further exploration.
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Objective:To investigate the Migration ability toward human pancreatic carcinoma cell line and human colon carcinoma cell line with difference HSP 70 plasma membrane expression .Methods: CD3-CD56+NK cells were obtained from human peripheral blood mononuclear(PBMC)in stem cell growth medium SCGM,2μg/ml TKD was added to the medium on 10th day,the ac-tivating receptor CD94/NKG2C expression levels on NK cells was detected with FAC after 4 days.The human pancreatic carcinoma cell line Colo357 and the human colon carcinoma cell line CW 2 were separated into Colo+and CW2+with high HSP70 expression and Colo-and CW2-with low HSP70 expression;Migration assays of NK to the four difference cell lines were performed in a Transwell cell culture system.The cytolytic activity of TKD-activated NK cells against the four subline with HSP 70 expression on their cell surface was analyzed by MTT assay.Results:Flow cytometry analysis showed that CD 3-CD56+NK cells could expanded after 2 weeks in SCGM medium,and the largest percentage of NK cell was (92.50 ±1.25 )%.CD94 expression levels on NK cells increased obviously after TKD inducement the cell surface HSP 70 expression of Colo+, Colo-were ( 78.2 ±2.2 )% and ( 27.3 ±1.2 )% separately , the cell surface HSP70 expression of CW2+,CW2-were (91.1±2.5)%and (18.2±1.0)%separately after FACS;the Migration of NK cells toward Colo+was (68.6±2.8)%,higher than the migration toward Colo-with (22.8±1.5)%;the Migration of NK cells toward CW2+was(73.5±2.7)%,higher than the migration toward CW2-with (18.2±1.3)%;the cytolytic activity of NK against Colo +was(61.2± 3.0)%compared to (24.5 ±1.5)%against Colo-when the ratio of effector cells and target cell was 20 ∶1,the cytolytic activity of NK against CW2+was (63.8±3.2)%compared to (22.4±1.8)% against CW2-when the ratio of effector cells and target cell was 20∶1.Conclusion:TKD-activated NK cells are highly efficient cytolytic effector cells which have stronger significant migration toward HSP70-positive tumor target cells on their cell surface in vitro .
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Objective:To investigate the antitumor effect of TKD-activated NK cells on tumor growth inhibition of human pancreatic carcinoma in nude mice .Methods:CD3-CD56+NK cells were obtained from human peripheral blood mononuclear ( PBMC) in stem cell growth medium SCGM , 2 μg/ml TKD was added to the medium on day 10.The activating receptor CD 94/NKG2C expression levels on NK cells was detected with FAC after 4 days.The cytolytic activity of TKD-activated NK cells against human pancreatic carcinoma subline with HSP 70 expression on their cell surface was analyzed by MTT assay .Established a new model of orthotopic-transplantation tumor of human pancreas .NK cells were injected i.v.into the tail vein of tumor-bearing mice on day 15,the antitumor activity of the NK were evaluated .The capacity to infiltrate Colo 357 tumors in SCID/beige mice was detected with Immunohis-tochemistry.Results:Flow cytometry analysis showed that CD3-CD56+NK cells could expanded in SCGM medium ,and the average percentage of NK cell was (87.50 ±1.35 )%.CD94 expression levels on NK cells increased obviously ,the mean fluorescence intensity of CD94 was(220.56±1.82),compared to (68.72±1.85)of control group cell.The cytolytic activity against HSP70 membrane-positive pancreatic carcinoma sublines Colo 357 cells was high and there was significantly statistical difference between TKD-activated NK cells and unactivated NK cells.The cytolytic activity was(68.72±2.55)%when ratio of effector cells and target cell was 40:1.TKD-activated NK cells had a stronger suppressive effect on tumor growth in BALB /c nude mice bearing Colo 357 cells in vivo ,Median inhibitory rates was ( 61.3 ±1.5 )% .There was significant statistical difference compare to control group ( P <0.01 ) .The result of Immunohistochemistry indicated that predominantly NK cells induced with TKD had the capacity to infiltrate Colo 357 tumors in SCID/beige mice.Conclusion: TKD-activated NK cells are highly efficient cytolytic effector cells which have a stronger significant suppression against pancreatic carcinoma growth in vivo .
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The incidence of low rectal cancer, which severely threatens human health, has been increasing annually in China. Sur-gical operation is the most effective treatment for low rectal cancer. In-depth analyses on the physiology and anatomy of the rectum and the biological characteristics of low rectal cancer have led to the wide application of anus preservation operation as a treatment for this disease. Anus preservation operation is widely used, especially because the application of the laparoscopic technique has recently be-come a popular topic in colorectal surgery. Alternative laparoscopic sphincter-preserving procedures for this disease include the follow-ing: laparoscopic anterior resection; and laparoscopic anterior resection with inter-sphincter resection or with prolapse technique. Colorectal anastomosis with double-stapler technique, hand-sewn coloanal anastomosis, and colonic J-pouch-anal anastomosis are com-mon reconstruction procedures. Each procedure has its own adaptive range, advantages, and disadvantages. Radical surgery must be pri-oritized, but we should also consider the patients' life quality when selecting a mode of surgery.
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Objective To develop and evaluate a porcine model for training the single needle running suture method of laparoscopie urethrovesical anastomosis(LUA). Methods Twenty minipigs with mean weight of 30kg were general anaesthetized with Sumianxin solution 0. 1 ml/kg intramuscularly. Pneumoperitoneum was created by insufflation of carbon dioxide by a veress needle inserted through the umbilicus. One 10mm port and two 5mm ports were positioned after the establishment of pneumoperitoneum. The intestine was used as "bladder". The procedures were completed with the single needle running suture method of laparoscopic urethrovesical anastomosis. Six trainees performed the LUA procedure based on the models during a laparoscopic training course, following the technique used in the operation room. The learning curve was analyzed by operative time. Results The porcine model for laparoscopic training was established successfully and 3 LUAs could be performed on each pig. Each trainee performed 10 LUAs based on the models during the training course of laparoscopic urology. The operative time declined from (55.3±10. 4)min initially to (22.4±4.8)min (P＜0. 01) after the training course. At the end of training, all trainees could accomplish a watertight LUR procedure on the model. Conclusions The establishment of the training model is feasible. The trainees could acquire the skills necessary to perform LUA in vivo based on this model. The model provides a platform for training the basic techniques of LUA procedures.
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Objective To compare the therapeutic outcomes between laparoscopic radical Rephrectomy and open radical nephrectomy for renal cancer. Methods A prospective randomized controlled trial was performed in Fujian Provincial Tumor Hospital from January 2006 to July 2009.Sixty-two cases were randomly divided into 2 groups:laparoscopic radical nephrectomy and open radical nephrectomy.Primary outcome(post-operative hospital stay)and second outcome(estimated blood loss,operative time,incision length,post-operative complications,recurrence,metastasis and survival)were compared between 2 groups. Results Post-operative hospital stay was(5.4±1.3)d in laparoscopic group and(8.1±2.2)d in open group(P<0.05).Median estimated blood loss was 100 ml in laparoseopic group and 200 ml in open group(P<0.05).There were no significant difference between teh 2 groups in operative time,post-operative complications,recurrence,metastasis and survival rates(P>0.05). Conclusion Laparoscopic nephrectomy could reduce hospital stay,which provides a minimally invasive approach for renal cancer.
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Objective To investigate the effect of hydroxyapatite nanoparticles (nHAP) mediated human telomerase re-verse transcriptase (hTERT) RNA interference of A549 human lung cancer cells in vitro. Methods The nHAP were synthe-sized by the homogeneous precipitation method. The structure of the nanoparticles was observed under transmission electron mi-croscope. The nHAP were prepared using nltrasonication and Na_2CO_3 and modified with poly-L-lysine (PLL) at pH 7. 4. The transfection of pGenesil-hTERT into A549 was divided into four groups as follows: nHAP-PLL group mediated by hydroxyapatite nanoparticles modified with poly-L-lysine ( nHAP-PLL), liposome group mediated by Lipefectamine, nHAP group mediated by hydroxyapatite nanoparticles and control group. The growth ability of cells was assayed with methyl thiazolyl tetrazolium meth-od. The expression level of hTERT protein was examined by Western blotting. Flow cytometry was used to detect the apeptosis ratio of A549 cells line. Results Under transmission electron microscope, the synthesized product presented needle-like and well dispersed particles with evenly distributed sizes of (15-20) nm × (60-80) nm. The proliferation of A549 cells of nHAP-PLL group, liposome group and nHAP group were obviously inhibited as compared with the control group (P < 0.05 ).The inhibition rate of nHAP-PLL group was more than the other groups. There was a significant difference inhibition rate be-tween the nHAP-PLL group compared with the liposome group and nHAP group (P <0.05 ). The level of hTERT protein hada similar varietal tendency with the result of proliferation of each group. Flow cytometry showed the apoptasis ratio of nHAP-PLL group, liposome group, nHAP group and control group was (28.1±1.4)%, (19.2±1.3)%, (10.9±1.2)% and (0.3±0.2 ) %, respectively. There was a significant difference in apoptosis ratio between the nHAP-PLL group, liposome group and nHAP group compared with control group( P < 0.05 ). Conclusion A549 human lung cancer cells overexpreas hTERT and this may be a target for inhibiting proliferation of A549. Hydroxyapatite nanoparticles can induce apeptosis of ASA9 cells in vitro. Hydroxyapatite nanoparticles modified with poly-L-lysine can effectively combine and protect DNA and mediate gene transfection to A549, it can mediate human telomerase reverse transcriptase RNA interference of A549 cells and inhibit the pro-liferation of ,4549 in vitro.
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Objective To explore the influence of alimentary tract reconstruction on blood glucose level in gastric cancer patients complicated with type 2 diabetes mellitus. Methods Clinical data of 67 gastric cancer patients complicated with type 2 diabetes mellitus and the level of blood glucose before operation, one month, three month, six month after operation were retrospectively analyzed. BMI of 53 patients was lower than 25kg/m2,9 patients between 25～29.9 kg/m2 and 5 patients was higher than 30kg/m2 .Total gastrectomy with P-type jejunal pouch Roux-en-Y esophagojejunostomy was performed in 26 cases, and total gastrectomy with Roux-en-Y esophagojejunostomy was performed in 11 cases, distal subtotal gastrectomy with Roux-en-Y gastrojejunostomy in 30 cases. Results Operations on sixty-seven patients were all uneventfully. The mean fasting blood glucose level in the morning was 9.6±3.3 mmol/L before operation, 7.4±2.6 mmol/L one month after operation, 7.5±2.3 mmol/L three month after operation, and 7.7±2.9 mmol/L six month after operation. There were significant differences between the blood glucose level of before operation and one month after operation (P0.05). Conclusions Alimentary tract reconstruction has obviousinfluence on blood glucose level in type 2 diabetes mellitus patients. It takes about one month for reveal the effect of operation. This phenomenon is of value for clinical application. Its mechanism needs further research.
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Objective To review the advancement of heat shock protein 70(HSP70) vaccine in alimentary canal cancer.Methods Related articles were reviewed.Results HSP70 can integrate with tumor special antigen to form HSP70 polypeptide compound.To activate the special and nonspecial immune response of body,HSP70 can participate in the process of tumor immunity as a "molecular partner".Conclusion HSP70 has shown alluring perspective in the precaution and treatment of alimentary canal cancer.