Effects of bcl-3 gene silencing on apoptosis of human colon cancer cell line RKO / 中国病理生理杂志

AIM:To investigate the effects of bcl-3 gene on the migration and apoptosis of human colon cancer cell line RKO, and the changes of cyclin D1 and apoptosis-related proteins.METHODS:After silencing of bcl-3 gene expression in human colon cancer cell line RKO by lentiviral vector with RNA interference, the changes of RKO cell migration ability were investigated by wound healing assay.The changes of RKO cell apoptotic rate after bcl-3 gene silencing were detected by flow cytometry with Annexin V/PI staining.The protein expression of cyclin D1 and apoptosis-related proteins in the RKO cells after bcl-3 gene silencing was determined by Western blot.RESULTS:The wound healing rates of the RKO cells were 84.00% and 40.00% before and after bcl-3 gene silencing, respectively, with statistically significant difference (P<0.05).Annexin V/PI staining showed that the cell apoptotic rates were 12.89% and 59.67% before and after bcl-3 gene silencing, respectively, when RKO cells were treated with 5 μmol/L cisplatin for 24 h, with statistically significant difference (P<0.05).The expression of cyclin D1 decreased, while the expression of Bax increased after bcl-3 gene silencing (P<0.05).CONCLUSION:After bcl-3 gene silencing, the migration ability of RKO cells decreases, and the apoptotic rate increases, accompanying with the changes of cyclin D1 and Bax.bcl-3 gene can affect the apoptosis of RKO cells by changing the expression of cyclin D1 and Bax.

Perioperative complications of intertrochanteric fractures in patients aged 80 years and over / 中华老年医学杂志

Objective To investigate the prevention and management of perioperative complications of intertrochanteric fractures in elderly in-hospital patients(aged≥80 years).Methods Clinical data of 103 intertrochanteric fracture patients(31 male and 72 female)undergoing surgical treatment at our hospital from May 2010 to Nov.2015 were retrospectively analyzed.Their ages ranged from 80 to 99 years,with an average of 86.2 years.There were 3 Evan type Ⅰ cases,25 type Ⅱ cases,36 type Ⅲ cases,37 type Ⅳ cases and 2 type V cases.Of these,82 received epidural anesthesia and 21 had general anesthesia.Intertrochanteric fractures were treated with proximal femoral nail(PFN) internal fixation in 101 patients and dynamic hip screw(DHS)internal fixation in 2 patients.Results The average operation duration and blood loss were 30 min and 60 ml in the PFN internal fixation group and 60 min and 150 ml in the DHS internal fixation group,respectively.The average hospitalization time was 16.7 days.One patient (0.9％) died after operation,10 (9.7％) had preoperative complications of bed rest with 3 cases involving the central nervous system and 4 cases involving the respiratory system,and 38 cases (36.9％)had postoperative complications with 13 involving the central nervous system.The average time from admission to operation was 6 days,with 65 cases above the average and 38 cases below the average,and there was a statistically significant difference in the incidence of postoperative complications between the two subgroups(30/65 or 46.2 ％for the former and 8/38 or 21.1％ for the latter,x2＝6.49,P＜0.05).Conclusions Elderly patients with intertrochanteric fractures should undergo surgery as soon as possible,preferably with epidural anesthesia.Proficiency in surgical kills,short operation time,close monitoring of preoperative and postoperative conditions,and proper and timely treatment are the key to ensuring surgical success.

Shenmai injection improves insulin resistance in 3T3-L1 cells / 中国病理生理杂志

AIM:To discuss the effect of Shenmai injection on insulin resistance ( IR) in 3T3-L1 cells and its mechanisms.METHODS:3T3-L1 preadipocytes were induced by chemical reagents to differentiate into fully differentiated adipocytes.Oil red O staining was used to detect the differentiation level of the adipocytes .The insulin-resistant 3T3-L1 cell model was demonstrated using insulin , which was confirmed by glucose concentration in cell supernatant .The IR cell model was given 10 μmol/L rosiglitazone , 25 and 50 g/L Shenmai injection and normal saline for comparison .MTT assay was used to assess the cell activity of 3T3-L1 cells which was treated with drugs for 8, 16, 24 and 36 h.Glucose oxidase method was used to detect the glucose concentration in the cell supernatant at 8, 16 and 24 h.The protein levels of glucose transporter-4 (GLUT4), phosphatidylinositol 3-kinase (PI3K), AKT and p-AKT were determined by Western blot .RE-SULTS:3T3-L1 adipocytes were successfully induced as shown by the positive oil red O staining .The IR cell model was demonstrated , and glucose concentration in the cell supernatant after treatment with Shenmai injection showed that Shenmai injection reduced the IR in 3T3-L1 cell model.The protein levels of GLUT4, PI3K and p-AKT increased compared to con-trol group.CONCLUSION:Shenmai injection reduces the IR in 3T3-L1 cell model, which functions by increasing the protein levels of GLUT4, PI3K and p-AKT.

Association of matrix metalloproteinase-1 gene promoter region (-1607) gene polymorphism with cyclosporine-induced gingival hyperplasia in re-nal transplant patients / 中国现代医生

Objective To study the relationship between single nucleotide polymorphisms of MMP1 gene (-1607) and cyclosporine-induced gingival overgrowth ( CsA-GO ) . Methods Polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) were used to detect 42 cases of cyclosporine-induced gingival hyperplasia patients and 118 normal controls. MMP1 (-1607) 1G/2G gene polymorphism type were detected and analysised;Logistic regres-sion model was used to calculate the different genotypes and the risk of cyclosporine-induced gingival hyperplasia re-lationship. Results Cyclosporine-induced MMP1 (-1607) 3 genotype frequency distribution of gingival hyperplasiacase group had no significant difference (P=0.37) with the control group. Patients who carry MMP1 (-1607) 2G genotype occurred cyclosporine-induced gingival hyperplasia have 1.37 times risk than 1G genotype (95%CI=0.81-2.36, P=0.24), and 1G genotype and cyclosporine-inducedgingival hyperplasiaun related torisk. Conclusion MMP1 gene promoter region (-1607) 1G/2G single nucleotide polymorphism of cyclosporine -induced gingival hyperplasia may not a genetic susceptibility factor, patients who carry 2G genotype has an increased risk of CsA-GO.

Accuracy of "funnel technique" in the thoracic pedicle screw instrumentation: experimental and clinical study / 中华创伤杂志

Objective To evaluate the accuracy of thoracic pedicle screw placement using the "funnel technique" and investigate its consistency in experimental study and clinical application.Methods The clinical data of three human cadavers and 11 patients with the installation of at least one thoracic pedicle screw at T1 -T12 from August 2006 to July 2008 were retrospectively analyzed. One junior spine surgeon lack of experience were responsible for placing these screws with the "funnel technique".The accuracy of screw placement and the complications related to the use of thoracic pedicle screws were analyzed by assessing postoperative CT scans. Results The mean follow-up time was 23.1 months,which showed no vascular or visceral complications, or iatrogenic neurological injury. The rate of unintended cortex perforations was 14% (10/72) in cadavers and 15% (8/55) in patients, respectively.The critical perforation occurred in two screws (3%) in cadavers and one screw (2%) in patients. There was no statistical difference between the percentage of cortex perforations in cadavers and patients. Of all the 11 patients, screw violation occurred laterally in six ( 11% ), medially in one ( 2% ) and superiorly in one (2%). No violations occurred inferiorly or anteriorly. For all patients, only one screw needed revision. The perforations made by the junior spine surgeon occurred in six screws in the first cadaver, three in the second cadaver and one in the third cadaver. Conclusions The "funnel technique" is a simple,safe, accurate and cost-effective technique for pedicle screw placement. The result of the experimental study is consistent with that of the clinical application. "funnel technique" is helpful for junior spine surgeons to master the technique of thoracic pedicle screw placement.