Objective To investigate the effects of co-transfection of the plasmid containing the wildtype (wt) INK4a/ARF gene on the chemosensitivity of human lung adenocarcinoma cell line A549. Methods Recombinant eukaryotic expression vectors pcDNA3-p16 INK4a and pcDNA3-p14 ARF were co-transfected into A549 cells by cationic liposome, in which the site of both genes was lost. By RT-PCR, immunocytochemistry and Western blotting analysis, G418 positive clone was obtained. The parental cell and negative control cell with plasmid pcDNA3-LacZ were used as controls. The 50% inhibition concentration (IC 50 ) of five commonly-used chemotherapy drugs and the apoptosis index (AI) of IC 50 were analysed respectively. Results Compared with the parental cells and negative control cells, the influence of the five drugs on IC50 was different. The values of IC 50 of doxorubicin and cisplatin decreased significantly but that of taxol, topotecan and vinorelbine remained unchanged. The apoptosis index of doxorubicin and cisplatin was much higher than that of other three drugs. Conclusion The chemosensitivity of a part of anti-cancer drugs could be changed by transfection of exogenous INK4a/ARF gene into lung adenocarcinoma cell A549.

Objective To explore the relationship between proliferation activity-related factors and androgen receptor (AR) expression in 113 cases of human prostate cancer (PCa). Methods AR and the proliferation activity-related factors (PCNA, Ki67, EGFR) in PCa were detected by immunohistochemistry and light/(electron) microscopy. Results Cell proliferation in AR-negative groups of PCa was significantly stronger than in AR-positive groups. Conclusion AR aberrant expression may promote proliferative ability of PCa, cell growth and heterogeneity significantly, which may be one of reasons that PCa is difficult to be cured.

Objective To explore the efficacy and safety of irinotecan as neoadjuvant chemotherapy (INAC) plus radical surgery (RS) for cervical cancer.Methods According to International Federation of Gynecology and Obstetrics (FIGO),81 cases were divided into Ⅱ B,ⅡA,and Ⅰ B2 groups.According to the tests of UGT1A1 gene polymorphisms,we adjusted the injection dose of irinotecan.The parameters were analyzed,including the efficacy,operation time and bleeding volume,postoperative pathology,survival time,and adverse reactions.The articles on irinotecan or paclitaxel combined with cisplatin for neoadjuvant chemotherapy between 2005 and 2015 were collected,and compared.Results The effective rate of chemotherapy was 81.5％ (Ⅰ B2 group:85.7％;Ⅱ A group:83.3％;and ⅡB group:72.2％),operation time was (5.3 ± 1.1) h,and blood loss was (781 ± 361.7) ml.After chemotherapy,37 cases were delayed diarrhea,70 cases were nausea,48 cases were vomiting,and 40 cases were bone marrow suppression.The infiltration rate,operation time,and blood loss on Ⅱ B group was significantly higher than that on Ⅱ A and Ⅰ B2 groups(P ＜ 0.05),and there was no significant difference in the chemotherapy efficiency,invasion depth,lymphatic metastasis,survival time and adverse reactions(P ＞0.05).Compared to three articles,the total effective rate in this study was higher than that in previous studies,also in Ⅱ A and Ⅱ B group.Conclusions Irinotecan chemotherapy regimens combined with cisplatin is effective and well tolerated.It is worthy of popularization and application.Detection of UGT1A1 gene polymorphism has guiding significance for chemotherapy regimen on irinotecan combined with cisplatin.

Objective To explore the relationship between the expressions of vascular endothelial growth factor(VEGF) and matrix metalloproteinase-9(MMP-9) in prostate cancer.Methods The expression of VEGF and MMP-9 in 148 samples of pathologically verified human prostate cancer(PCa) and 10 samples of benign prostatic hyperplasia(BPH) were detected by immunohistochemical staining.Results VEGF was overexpressed in 98 of 148 tumor tissues(66.2%) and MMP-9 was overexpressed in 58 of 148 tumor tissues(39.2%).Both of them were significantly higher than those in BPH(P0.05).But the expression of VEGF was correlated with that of MMP-9.Conclusion The expressions of VEGF and MMP-9 are closely associated with the development of prostate cancer.Therefore VEGF and MMP-9 may be clinically useful as predictor of patients'survival.

Objective To explore the long-term outcomes of endoscopic submucosal dissection (ESD) of gastric GISTs.Methods Data of 25 patients with gastric stromal tumors,who underwent ESD,were reviewed in terms of clinical characteristics,histopathologic results,complications and long-term outcomes.Results Twenty-five patients underwent one-time complete removal of lesion, with a average tumor size of 3.0 cm (range,0.6 to 7.6 cm).The average time of operation was 65 minutes (range,15 to 154 minutes).one case was observed with intraoperative hemor-rhage of 200 mL blood,which was successfully managed by hemostatic forceps.Perforation with incidence rate of 16%occurred in 4 cases and was closed well with clips.Mucosal mechanical laceration of esophagus occurred in 1 case when the big tumor was taken out.The average length of hospi-talization was 7.3 days (range,4 to 21 days).A follow-up for 30 months (range,13 to 54 months) showed no tumor recurrence or metastasis. Conclusion ESD is an effective and safe endoscopic procedure to remove gastric GISTs for long-term outcomes in patients with no metastasis.