[Objective]To observe the effects of mesenchymal stem cells(MSCs) transplantation on the brain-derived neurotrophic factor(BDNF) and growth associated protein-43(GAP-43) after the spinal cord injury(SCI) of rats, and to investigate the mechanism of repairing the SCI by MSCs transplantation. [Method]Seven days after the operation of SCI,the MSCs were transplanted into the injured site. Then GAP-43 and BDNF were tested by RT-PCR. By means of above,the mechanism of repairing the SCI after the cell transplantation was investigated.[Result]Compared with group B, transplantation of MSCs enhanced the expression of BDNF mRNA and GAP-43 mRNA in the spinal cord of group A, improved the neuron regeneration.[Conclusion] The transplantation of MSCs can repair the injuried site and promote the regeneration of axon by enhanced the expression of BDNF mRNA and GAP-43 mRNA. It is one of the mechanism of repairing the SCI by MSCs transplantation.

AIM: To study the effects of tetrandrine(Tet) and fructose-1,6-diphosphate(FDP) on the elevated intrasynaptosomal [Ca 2+ ] i induced by excitatory amino acids (EAA). METHODS: A rapid method for preparing synaptosomes was used, and intrasynaptosomal free calcium ([Ca 2+ ] i) was measured by using the fluorescent indicator quin-2. RESULTS: L-glutamate (Glu, 100 ?mol/L), aspartate (Asp, 100 ?mol?L -1 ), N-methy1-D-aspartate (100 ?mol/L) and Glu (50 ?mol/L) plus Asp (50 ?mol/L) all elevated intrasynaptosomal [Ca 2+ ] i in a dose-dependent manner. Pretreatment with Tet (10,30,60 ?mol/L) , FDP (15, 30, 75, 150 ?mol/L), MK-801 (10, 20 ?mol/L) and Tet (15, 30 ?mol/L) plus FDP(15, 30 ?mol/L) all attenuated the increase in intrasynaptosomal [Ca 2+ ] i induced by EAAs mentioned as above in a dose-dependent manner, and the effect of Tet plus FDP was most significant. CONCLUSION: Both Tet and FDP inhibited a rise in intrasynaptosomal [Ca 2+ ] i induced by EAAs, which may be one of mechanisms that Tet and FDP pretect cerebral tissues against ischemia injury.

Objective To summarize the clinical features,diagnosis,treatment and prognosis of hepatolithiasis complicating cholangiocarcinoma. Methods From June 1958 to March 2011,709 cases of hepatolithiasis were admitted to Department of General Surgery,Peking University Third Hospital.The cases concomitant with cholangiocarcinoma were reviewed. Results 20 of 709 (2.8％ ) hepatolithiasis cases developed cholangiocarcinoma.17 cases (85％,17/20) were followed-up for 2 years (0 - 15 years).The hepatolithiasis course before the malignant diagnosis was 15 ± 1 1 years (3 -38 years).14 cases had frequent episodes of cholangitis,15 cases had liver cirrhosis.Preoperative diagnosis was established by CT,MRCP,B-ultrasound and tumor markers in 55％ (11/20) cases.4 cases underwent radical resection,7 received palliative resection,9 cases received conservative treatment.In radical resection,one lost to follow-up,one survived one year,two for 5 years.In palliative resection,2 lost to follow-up,two survived one year,one survived 3 years, one for 5 years. None in conservative group survived more than one year.Conclusions Cholangiocarcinoma developed from hepatolithiasis with a long history,frequent cholangitis,liver cirrhosis,especially in cases with imige showing thickness of bile duct or mass and rising tumor markers (CA19-9,CA125,CEA).The cases undergoing radical resection may have a favorable prognosis.

Objective To explore the relationship between surgical procedure and prognosis of gallbladder carcinama invading the whole layer without extension beyond serosa. Methods A retrospective analysis on 24 patients with pathologic stage T2 gallbladder carcinoma invading the whole layer without extension beyond serosa was performed. Kaplan-Meier method was used to analyze the survival rate and disease-free survival rate between the patients undergoing radical resection ( n = 14) and the patients undergoing simple cholecystectomy (re = 10). Results The 1,3 and 5-year survival rates for patients undergoing radical resection were 100%、71% and 54% respectively, whereas the rates that for patients undergoing simple cholecystectomy were 70%、30% and 20% respectively. There was significant difference between the survival time of these two groups ( X2 =4. 659, P = 0. 031). The median clinical tumor-free survival time in radical resection group and simple cholecystectomy group were 45 months and 13.5 months respectively. There was significant difference between the clinical tumor-free survival time of these two groups ( X2 = 3. 854, P = 0. 049 ). Conclusions A radical resection is indicated for patients with pathologic stage T2 gallbladder carcinoma. Radical resection is an effective method to improve the survival rate for pathologic stage T2 gallbladder carcinoma.

Objective To explorethe clinical features of adenosquamous carcinoma,squamous cell carcinoma and adenocarcinoma of the gallbladder. Methods A retrospective analysis of 112 patients with gallbladder carcinoma was performed.The clinical features and outcomes of 11 patients with either adenosquamous or squamous cell carcinoma were compared with the other 101 patients of adenocarcinoma.Results The rate of tumor with T3 or T4 stage in adenosquamous/squamous cell carcinoma group and adenocarcinoma groupwere 100%and 53%(X2=7.013,P=0.008).The rate of distant metastasis in adenosquamous/squamous cell carcinoma group and edenocarcinoma at advanced stage(T3 or T4 stage)group were 0 and 35%(X2=3.900,P=0.048).The rate of lymph node invasion were 82% and 87%(X2=0.000,P=1.000).The rate of gastrointestinal tract invasion in adenosquamous/squamous cell carcinoma group and adenocarcinoma at advanced stage(T3 or T4 stage)group were 45% and 15%(X2=3.618,P=0.054).The median survival time for the two groups were 5 months and 4 months respectively(X2=0.359,P=0.549).Condusiom Adenosquamous/squamous cell carcinoma of the gallbladder had high local invasion capacity and usually were diagnosed at an advanced stage.The distant metastasis rate of adenosquamous/squamous cell carcinoma of the gallbladder was lower compared with adenocarcinoma.The lymph node invasion mte of adenosquamous/squamoua cell carcinoma was similar to adenocarcinoma.

Objective To evaluate laparoscopic radical cholecystectomy for T2 gallbladder cancers.Methods A retrospective analysis was made on 44 patients with pathology confirmed T2 gallbladder cancer undergoing laparoscopic vs open radical cholecystectomy.The clinicopathological and follow-up data were compared.Results Laparoscopic cholecystectomy was performed in 32 patients,the implantation metastasis rate of this approach has no statistical differences compared with the open cholecystectomy (P =1.000).26 patients underwent laparoscopic radical resection and the remaining 18 patients underwent open radical resection.There was no statistical difference in operation time (P =0.953),blood loss (P =0.193)and postoperative complications (P =1.000),but the laparoscopic radical resection group is superior to the open group on postoperative pain grading (P =0.022),ambulation time (P =0.000),nothing per mouth time (P =0.000) and length of hospital stay (P =0.048).The mean number of lymph nodes retrieved was 5 ±4 (range 1-12) in the laparoscopic radical group and 6 ± 3 (range 1-12) in the open group (P =0.983);the 1,3,5 year survival rates was 92.3％,70.3％,61.5％ and 92.3％,76.3％,69.3％,respectively(P =0.473).Conclusions Initial laparoscopic cholecystectomy does not increase the rate of seeding metastasis in the context of intact gallbladder carcinoma.Totall laparoscopic radical resection is feasible in selected T2 gallbladder cancer patients.

SUMMARY To investigate the effect and feasibility of total laparoscopy to treat hepatolithiasis using gall-bladder-hepatic duct subcutaneous tunnel.Retrospective analysis was conducted of the case data of 11 pa-tients with hepatolithiasis who underwent total laparoscopic treatment using gallbladder-hepatic duct sub-cutaneous tunnel from January 2010 to October 2014.The operation time,blood loss,postoperative com-plications and recurrence of stones were recorded.All the cases completed the operation.The average hos-pital-stay was 9.2 days (range:3 -29 d).The average operation time was 298 min (range:225 -480 min).The average blood loss was 253 mL (range:50 -700 mL),and the average blood loss of liver re-section groups was 325 mL (range:200 -700 mL).The average discharge time was 3.3 days (range:3 -5 d).The rate of postoperative residual stones was 36.4% (4 /11).We extracted stones with chole-dochofiberscope via T-tube sinus six weeks after operation.One case developed biliary leakage,and healed through adequate drainage and the T-tube was pulled out after one month.There was no periopera-tive mortality.All the cases were followed up and the mean follow-up was 22 months (range:2 -51 months).The anastomotic stenosis of gallbladder-hepatic duct was found in one case.But we got a good therapeutic result with performed gallbladder chemical ablation with 95% ethanol.No recurrence of hepa-tolithiasis was found.As a choice for minimally invasive method to hepatolithiasis using gallbladder-he-patic duct subcutaneous tunnel,total laparoscopy is a safe and feasible procedure.

ObjectiveTo study the biological characterization and the genetic background of circulating CA16 strains in mainland of China for the purpose of CA16 vaccine development in the future.MethodsCA16 strains were isolated from throat swabs of patients with hand-foot-mouth disease and identified by neutralization assay and RT-PCR.The genotype of these isolates were determined by sequence alignment and phylogenetic analysis of VP1 gene.The proliferation dynamics and the plaque morphology were observed when propagated in Vero cells.The pathogenicity of these CA16 isolates was evaluated by challenging newborn mice.ResultsIn this study,six CA16 circulating isolates,BJ-1-6 were obtained.The RT-PCR products were 150 bp amplified with the general enterovirus primers and 210 bp with CA16 primers respectively,which cannot be amplified by EV71 primers.Additionally,these isolates were identified to display some obvious proliferation dynamics and plaque morphology when propagated for 96 h in Vero cells.The diameter of plaques were about 1.5 to 2 mm for BJ-1,BJ-2,BJ-4,BJ-6,4-5 mm for BJ-3 and 3 mm for BJ5,the plaques were regular except BJ-3.All the six isolates can be neutralized by the convalescent serum of patient infected with CA16.The virus titer of different isolates propagated for five passages in Vero cells was 7.0LgCCID50/ml.The sequence alignment of VP1 gene demonstrated that the genotypes of BJ-2,BJ-4,BJ5 were C1 and BJ-1,BJ-3,B J-6 were C,3 comparatively.The genetic distance of the VPI gene from theseisolates suggested that they were highly genetic identity with the homology of 90％ in nucleotide and 99％ in dedicated amino acid respectively.However,a distinctive difference in pathogenic ability in neonatal mice was found that the suckling mice challenged with BJ-3 & BJ-5 were paralyzed 4-5 d and dead 6-7d postchallenge,compared with the control group without any abnormality in the during of 14 d.ConclusionThe circulating CA16 isolates in China have different biological characteristics,different pathogenic ability and similar genetic backgrounds,which is helpful for the development of a CA16 vaccine in the future.

OBJECTIVETo investigate the change of T lymphocyte subsets, interleukin (IL)-2 and tumor necrosis factor (TNF)-alpha in the tumor- bearing mice and patients with oral cancer receiving thermo-chemotherapy, and investigate the correlation among them.

METHODSAfter treatments, the expression of lymphocyte transformation index (LTI), IL-2 and TNF-alpha in the tumor-bearing mice were detected with methyl thiazolyl tetrazolium (MTT), the expression of IL-2 and TNF-alpha in the patients with oral cancer were detected with MTT, the expression of LTI, CD4+ and CD8+ were detected with 3H-TdR incorporation.

RESULTSLTI, IL-2 and TNF-alpha of thermo-chemotherapy group (HP group) had no significant difference comparing with those of normal mice group (N group) (P>0.05), but which were significantly higher than those of chemotherapy group (P group) and no treatment group (NT group) (P<0.01). In clinical trials, the expression of LTI, CD4+, CD4+/CD8+, IL-2 and TNF-alpha on oral cancer patients after thermo-chemotherapy were significantly higher than those before thermo-chemotherapy (P<0.01).

CONCLUSIONAfter thermo-chemotherapy, the expression of LTI, IL-2 and TNF-alpha of tumor-bearing hosts are significantly improved, there is a significant correlation between IL-2 and T cell.

Animals ; Humans ; Interleukin-2 ; Mice ; Mouth Neoplasms ; Neoplasms ; T-Lymphocyte Subsets ; Tumor Necrosis Factor-alpha

OBJECTIVETo study the anti-invasion effect of SEPT7 gene on U251MG glioma cells and its possible molecular mechanism.

METHODSRecombinant adenovirus vector carrying SEPT7 gene (rAd5-SEPT7) was transduced to human glioma cell line U251MG, and empty adenovirus vector was used as control. Tumor invasion was examined by Transwell method and 3 D-Matrigel assay, and tumor cell migration by wound-healing method and 2 D-Matrigel assay. Three major molecular events associated with cell motility and migration, including changes of expression in MMP2, MMP9, MT1-MMP, TIMP1 and TIMP2, the alteration of integrin alpha(v)beta(3) expression, and the structural change of cytoskeleton protein, tubulin-alpha, in U251 cells transduced with rAd5-SEPT7 were studied by Western blotting, immunofluorescence and laser scanning confocal microscope, respectively.

RESULTSThe invasive and migratory capabilities of cells transduced with rAd5-SEPT7 were inhibited. The expression of extracellular matrix metalloproteinases MMP-2, MMP-9, MT1-MMP and integrin alpha(v)beta(3) was significantly decreased, while the expression of matrix metalloproteinase inhibitor TIMP1, TIMP2 was upregulated. Intracellular cytoskeleton protein-tubulin-alpha in U251 cells exhibited prominent morphological changes which including the appearance of distortion and aggregation resulting from redistribution of tubulin-alpha, and this feature of alteration was similar to the tubulin-alpha structure in normal non-tumor cells.

CONCLUSIONSEPT7 gene can inhibit the invasion and migration ability of U251 glioma cells. Its molecular mechanism may include that SEPT7 gene reverses the imbalanced state of MMPs/TIMPs, downregulates the expression of integrin alpha(v)beta(3) and alters the structure of tubulin-alpha of U251MG glioma cells. It is suggested that SEPT7 gene could be a good candidate for gene therapy of gliomas.

Adenoviridae ; genetics ; Blotting, Western ; Cell Cycle Proteins ; genetics ; physiology ; Cell Line, Tumor ; Cell Movement ; genetics ; Genetic Vectors ; genetics ; Glioma ; metabolism ; pathology ; Humans ; Integrin alphaVbeta3 ; metabolism ; Matrix Metalloproteinase 14 ; metabolism ; Matrix Metalloproteinase 2 ; metabolism ; Matrix Metalloproteinase 9 ; metabolism ; Microscopy, Confocal ; Neoplasm Invasiveness ; genetics ; Septins ; Tissue Inhibitor of Metalloproteinase-1 ; metabolism ; Tissue Inhibitor of Metalloproteinase-2 ; metabolism