Objective To investigate the roles of phosphatase and tensin homolog deleted on chromosome 10(PTEN),insulin-like growth factor 1(IGF-1),and insulin-like growth factor receptor 1 (IGF-1R) in the tumorigenesis,development,invasion and metastasis,and prognostic value of gastric cancer.Methods Immunohistochemical assay was used to detect the expressions of PTEN,IGF-1,and IGF-1R in gastric cancer tissue samples from 74 gastric cancer patients and in normal gastric mucosa of 20 health individuals.All data of these patients were collected including the grading and differentiation of the tumor.Results In gastric cancer,expression of PTEN was decreased,and expressions of IGF-1,and IGF-1R were enhanced.The expressions of PTEN,IGF-1 and IGF-1R had correlation with the outcome and biological behavior of gastric cancer.PTEN expression was higher in no lymph node metastasis group than lymph node metastasis group,higher in stage Ⅰ–Ⅱgroup than stage Ⅲ–Ⅳgroup.IGF-1 and IGF-1R expressions were higher in progressive group than early gastric cancer group,higher in poor differentiation group than moderate and well differentiation group,higher in lymph node metastasis group than no lymph node metastasis group,higher in stage Ⅰ–Ⅱgroup than stage Ⅲ–Ⅳgroup.PTEN-negatively-expressed patients had poor prognosis compared with positively-expressed ones;so did those who expressed IGF-1 and IGF-1R.Conclusion The changes of PTEN,IGF and IGF-1R play roles in gastric cancer genesis,progression and prognostic evaluation.

Objective To study the differences of chromosomal structure among Yersinia pestis strains isolated from China,and to investigate the reasons of chromosomal rearrangement events occurred in Yersinia pestis as well as the possibility of strain identification and phylogenetic analysis based on the chromosomal rearrangement features.Methods According to the genome sequence data downloaded from web of National Center for Biotechnology Information (http://www.ncbi.nlm.nih.gov/genome),alignment of all the coding sequences (CDSs) among five strains(American strain CO92 as reference and other four completely sequenced strains from Inner Mongolia,Jianchuan of Yunnan,Yulong of Yunnan,Naqu of Tibet in China named 91001,D182038,D106004 and Z176003 as comparison strains) was performed,and then the chromosome of Yersinia pestis was divided into several large DNA segments (named chromosomal plate in the text) according to the similarity of CDSs.Plate arrangement patterns in each strain' s chromosome and gene content of breakpoint regions were determined.Finally,genetic relationships among Yersinia pestis strains were analyzed on the basis of rearrangement diversity from paired-comparison.Results Yersinia pestis chromosomes of strains CO92,D182038,D106004,91001 were composed of 44 relatively independent plates,except strain Z176003.Gene order was very stable within each plate,while it was movable between the plates.Comparing with the reference strain CO92,13 rearrangement events occurred in the chromosomes of both strain D182038 and strain D106004,and 14 rearrangement events involved in Z176003,while 37 rearrangement events occurred in 91001.Paired-comparison data showed that only 8 plates order differences were existed between D106004 and Z176003.Forty-three breakpoint regions were identified on the chromosome of strain CO92,and 39 of them contained insertion sequences,and 25 of them were IS100.Conclusions Yersinia pestis genome represents a high degree of genetic flux,and chromosomal structures of strains are significantly different from each other.Chromosomal rearrangement events is closely related to the large number of insertion sequences in the Yersinia pestis chromosome.Rearrangement diversity among Yersinia pestis strains could reflect their genetic relationships.

OBJECTIVE To validate the anticancer effect of Angong Niuhuang pill (AGNH) and pinpoint associated molecular mechanisms using human cancer cells.METHODS Human MGC-803 gastric carcinoma and human BEL-7402 hepatocarcinoma cells were incubated with AGNH 9,30,90,300 and 900 mg·L-1 for 24,48and 72 h,respectively.Cell viability was detected with 3-(4,5-dimethylthiazol-2-yl) -5-( 3-carboxymethoxyphe-nyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay and colony formation assay.Apoptosis was measured with flow cytometry and Hoechst 33258/PI staining.Change in mitochondrial membrane potential (△qψ) was detected by spectrofluorophotometer.RESULTS AGNH inhibited MGC-803 cell proliferation ( for 48 h,r =0.996,P =0.002; for72 h,r=0.756,P=0.024 ) and BEL-7402 cells (for 48 h,r =0.732,P=0.030; for72 h,r=0.702,P =0.037) in a concentration-dependent manner,as showed by MTS assay.AGNH inhibited colony formation on MGC-803 cells (r =0.914,P =0.011 ) and BEL-7402 cells (r =0.871,P =0.024) in a concentration-dependent manner for 24 h.Hoechst 33258/PI staining and flow cytometry assay showed that AGNH 900 mg·L-1 for 24 h induced apoptosis of MGC-803 and BEL-7402 cells,and the apoptosis rate was 27.2％ and 19.7％,respectively.Compared with normal control group,AGNH 900 mg·L-1 for 3 min decreased the mitochondrial membrane potential of MGC-803 and BEL-7402 cells to 15.9％ and 15.0％ of control group.CONCLUSION AGNH inhibits proliferation of human cancer cells.Apoptosis and depolarization of mitochondrial transmembrane potential are probablly its mechanism.

Background and purpose:It was reported that zinc ifnger protein 139 (ZNF139) was expressed aberrantly in gastric cancer. But the relationship between ZNF139 and multidrug resistance (MDR) of gastric cancer is still not clear. The purpose of this research was to investigate the expressions and signiifcance of ZNF139, MRP-1, MDR1/P-gp, GST-π in human gastric carcinoma cell lines SGC7901 and SGC7901/ADR. Methods: The expressions of ZNF139, MRP-1, MDR1/P-gp, GST-πwere determined with RT-PCR and Western blot in SGC7901 and SGC7901/ADR cell lines. Then siRNA recombinant plasmid of targeting ZNF139 gene was constructed and imported into gastric cancer cell line SGC7901/ADR, and the expressions of MRP-1, MDR1/P-gp, GST-πwere tested simultaneously. Results:The expressions of ZNF139, MRP-1, MDR1/P-gp, GST-πwere higher in SGC7901/ADR than in SGC7901(P<0.05). ZNF139 was inhibited obviously after siRNA-ZNF139 was transfected into SGC7901/ADR, and expression of MRP-1, MDR1/P-gp, GST-πdecreased(P<0.05). Conclusion:ZNF139 may be invovled in multidrug resistance (MDR) of gastric cancer by up-regulating MRP-1, MDR1/P-gp and GST-π.

Objective To explore the HRCT characteristics of solitary pure bronchioloalveolar carcinoma.Methods Compared with postop pathological appearance,21 patients with 22 affections tumors which were pathologically confirmed pure bronchioloalveolar carcinoma were retrospectively reviewed.Results the histopathological results prior to surgery showed that 20 patients with 21 affections tumors were non-mucilaginous BAC and 1 patient was mucilaginous BAC.Noguchi's classification:Type A 3 cases,Type B 12 cases,Type C 5 cases.(Mucilaginous BAC was not classified)Stage classification:There were 21 cases with stage ⅠA,the maximum tumor diameter was from 0.3 to 3.0 mm (average diameter 1.3 mm).No case showed pleura metastasis,vessel invasion and lymphaticmetastasis.Appearance of HRCT:according to the amount of GGO,all affections were divided into 4 groups.A group(5/22),B group(7/22),C group(7/22),D group(3/22).There were 11 cases with pleura traction,5 cases with clear boundary and trimmed edges and other 17 cases were contradistinction.There were 21 cases with blood vessel or bronchus shadow.Conclusion HRCT can show scan can provide details of structure characteristics of BAC's pathological histology,so it plays an important role in prediction of pathological infiltration of tumor cells and prognosis assessment.

Objective: To study the relationship between human herpes vi rus 6 (HHV-6) infection and oral squamors cell carcinoma. Methods: The serum anti-HHV-6 antibody titers from 16 cases of oral squamors cell carcinoma (OSCC) and 16 control subjects were detected by indirect immunofluores cence assay. HHV-6 DNA in peripheral blood mononuclear cells was amplified by P CR and the specificity was confirmed by Southern-blot hybridization with an int ernal probe oligonuclotide. An immunohistochemical staining was used to detect H HV-6 antigen in OSCC tissues. Results: Positive expression of s erum HHV-6 IgG antibody was found in all the cases of OSCC and in 12 of the 16 controls. Geometric mean titer of OSCC group and control group was 1∶118 and 1 ∶64 respectively (P

Objective To investigate CT feature after contrast-enhanced and anatomic distribute of the whole body lymph nodes involved by lymphoma. Methods The whole body CT findings in 89 cases (HL 12 cases, NHL 77 cases) of malignant lymphoma were retrospectively analyzed. The contrast-enhanced CT features (size, density and the digree of contrast enhancement) and anatomic distribution of the whole body lymph nodes involved by lymphoma were clarified. Results In the HL group, Diffuse and homogeneous enhancement of the enlarged lymph nodes was found in 9 cases (75.0 %), while homogeneous enhancement of the enlarged lymph nodes with some little necrosis was found in 3 cases (25.0 %). In the NHL group, diffuse and homogeneous enhancement of the enlarged lymph nodes was found in 64 cases (83.1 %), while homogeneous enhancement of the enlarged lymph nodes with some little necrosis was found in 13 cases (16.9 %). There was not statistically significant (Fisher exact probability, P = 0.4461) between the two groups. In the HL group, the enlarged lymph nodes were mixed together in 6 cases (50.0 %), while the enlarged lymph nodes were separate in 6 cases (50.0 %). In the NHL group, the enlarged lymph nodes were mixed together in 8 cases (10.4 %), while the enlarged lymph nodes were separate in 69 cases (89.6 %), there was statistically significant (Fisher exact probability, P = 0.0028). The dominant anatomic distributions of the lymph nodes involved by HL group were neck and mediastinum. The dominant anatomic distributions of the lymph nodes involved by NHL group were neck, mediastinum and abdomen, there was not statistically significant between the anatomic distributions (Fisher exact probability, P =0.110). Conclusion CT can easily demonstrate the involvement and extension of malignant involving the whole body, but CT can not differentiate HL and NHL except for the confluence state.

Objective To evaluate the value of 3.0T magnetic resonance multi-b value diffusion-weighted imaging (DWI) in evaluating the efficacy of chemotherapy for patients with central lung squamous cell carcinoma and atelectasis. Methods Twenty patients with lung squamous cell carcinoma were examined by magnetic resonance imaging (MRI) (including T1WI, T2WI and multi-b value DWI) before chemotherapy, 2 cycles of chemotherapy and 4 cycles of chemotherapy. The images, the tumor volume and changes of apparent diffusion coefficient (ADC) were analyzed. Results In the patients with central lung cancer and atelectasis, the tumor and atelectasis could be distinguished on MRI examination before radiotherapy. It was more easily identified on T2WI images after radiotherapy. In the 20 patients, the ADC values in the effective group (partial remission or complete remission) and the invalid group were increased, but the differences of ADC values in the effective group before chemotherapy, 2 cycles and 4 cycles of chemotherapy were statistically significant [b=800 s/mm2:(1.09 ± 0.52) × 10-6 mm2/s, (1.22 ± 0.59) × 10-6 mm2/s, (1.24 ± 0.52) × 10-6 mm2/s, F = 31.19, P < 0.001]. There was no significant difference in ADC values between before and after chemotherapy (b = 800 s/mm2: (1.10 ± 0.49) × 10-6 mm2/s, (1.16 ± 0.60) × 10-6 mm2/s, (1.20 ± 0.72) × 10-6 mm2/s, F=2.86, P=0.089]. When b=800 s/mm2, the ADC curve slope in the effective group was more stable, better linearity. Conclusions The MRI technique can accurately distinguish the tumor from atelectasis before and after chemotherapy. The change of ADC value after chemotherapy is earlier than that of morphological change. The change rate of b value can better evaluate the curative effect of chemotherapy.

OBJECTIVETo discuss the effect of modified double tracks anastomosis in patients with type Siewert II-III( adenocarcinoma of the esophagogastric junction(AEG) treated with radical gastrectomy.

METHODSClinical data of 763 patients with type Siewert II-III AEG undergoing radical operation in our department from January 2004 to December 2008 were analyzed retrospectively. Patients were randomized into 3 groups according to the different procedures modes: radical proximal gastrectomy with modified double tracks anastomosis(266 cases), radical proximal gastrectomy with esophageal gastric stump end-to-side anastomosis(252 cases), and radical total gastrectomy with esophageal jejunum Roux-en-Y anastomosis(245 cases). There were no significant differences in general information and biological characteristics among the 3 groups(all P>0.05). Radical degree, safety, quality of life and prognosis were compared among 3 groups.

RESULTSThere were no significant differences in postoperative complications among the three groups(P>0.05). Six months after operation, in modified double tracks anastomosis group, food intake recovery percentage was superior to the other two groups, and the Visick scores and endoscopic grading were better than esophageal gastric stump end-to-side anastomosis group(all P<0.05). There was no significant difference in recurrent rate of gastric stump between modified double tracks anastomosis group and esophageal gastric stump end-to-side anastomosis group(P>0.05). The 5-year overall survival rate of these 3 groups was 48.7%, 46.3% and 50.2% respectively, and no significant difference was found(all P>0.05).

CONCLUSIONModified double tracks anastomosis is an ideal surgical method for type II-III AEG.

Adenocarcinoma ; Anastomosis, Roux-en-Y ; Esophageal Neoplasms ; Esophagogastric Junction ; Gastrectomy ; Gastric Stump ; Humans ; Postoperative Complications ; Quality of Life ; Retrospective Studies ; Stomach Neoplasms ; Survival Rate

Objective To discuss the clinical efficacy of surgical treatment of pathologic vertebral surgery for thoracic and lumbar tuberculosis. Methods All of 322 cases of thoracic and lumbar spinal tuberculosis patients from December 2003 to June 2014 were retrospectively analyzed in our department. All patients were underwent debridement, fusion and nerve decompres?sion surgery. According to different fixed methods, patients were divided into pathologic vertebral surgery group (fixation complet?ed within lesions invaded motion unit) including 91 males and 100 females, with an average age of 41.53 years, and non?pathologic vertebral surgery group (long segments or short segment fixation) including 61 males and 70 females, with an average age of 42.72 years. We observed the tuberculosis cure rate, degrees of deformity, pain and neurological recovery, operative time, blood loss and complications by follow?up. Results The average follow?up time was 75.52 months in pathologic vertebral surgery group and 76.21 months in non?pathologic vertebral surgery group. The total number of pathologic vertebras in pathologic vertebral surgery group and non?pathologic vertebral surgery group were 277 and 218 respectively, and the average was 1.45 and 1.66. The total number of fixed segments was 277 in pathologic vertebral surgery group and 485 in non?pathologic vertebral surgery group, and the average fixed segments was 1.45 and 3.70. The cure rate was 85.86%in pathologic vertebral surgery group and 85.49%in non?pathologic vertebral surgery group at 6 months postoperatively, and 98.95%and 98.47%at the last follow?up time, with no signifi?cant difference between groups. Graft fusion rate was 89.00%in pathologic vertebral surgery group and 89.31%in non?pathologic vertebral surgery group 6 months postoperatively, 98.38%and 98.47%at the last follow?up time, without significant difference. In lumbar spine, the average correction of Cobb's angle was 12.4° in pathologic vertebral surgery group and 13.1° in non?pathologic vertebral surgery group, and the average angle loss was 1.3 and 1.4°, with no significant difference. In thoracolumbar, the average correction of Cobb’s angle was 10.9°in pathologic vertebral surgery group and 11.1°in non?pathologic vertebral surgery group, and the average angle loss was 1.7°and 1.5° respectively, without significant difference. However, in thoracic, the average correction of Cobb's angle was 10.2° in pathologic vertebral surgery group and 12.7° in non?pathologic vertebral surgery group, and the average angle loss was 3.6° and 2.5°respectively, with significant difference. The mean operation time was 210.45 min in pathologic verte?bral surgery group and 210.45 min in non?pathologic vertebral surgery group, with significant difference. The average blood loss was 726.12 ml in pathologic vertebral surgery group and 726.12 ml in non?pathologic vertebral surgery group, with significant dif?ference. The complication rate was 11.51%in pathologic vertebral surgery group and 11.45%in non?pathologic vertebral surgery group, with no significant difference. Conclusion Pathologic vertebral surgery surgery is a safe, effective and feasible method of operation for treatment of thoracic and lumbar tuberculosis, which can effectively preserve adjacent normal vertebral motion unit features. The thoracic surgery was less satisfactory than the lumbar and thoracolumbar surgery.