Immune system is the autologous defense system for people to resist disease. Immunotherapy stimulates the immune system to resist disease, including treatment with immunocyte and vaccine. In recent years, the prognosis and survival quality of tumour patients have been greatly improved through cell immunotherapy by immunoregulation and killing directly on tumor. Immunotherapy becomes the hotspot in research.The study of DN Treg cell on immunotherapy will be of vital significance.

Objective: To evaluate effects of atrioventricular nodal ablation, pacemaker and pharmaco logic agents on ventricular rate control. Methods:Three patients with chronic sustained atrial fibrillation ( AF) were treated by atrioventricular nodal ablation. Fast-slow junctional cardiac rhythm in this course meant the ablation was successful. Unless the ablation was able to get Ⅱ? Ⅱ type or Ⅲ? AVB, R-R intervals ≥3 s, ventricular rate≤40 bpm, it would be canceled. Otherwise implantation of a permanent pacemaker was performed. Results:One patients having complete atrioventricular block and a ventricular rate of 38 -40 bpm had implantation of a permanent pacemaker. Two patients having no atrioventricular block, prolongation of R-R intervals and ventricular rate of 90 - 120 bpm were given antiarrhythmic drugs. Conclusion: Patients with chronic sustained AF can be treaded with atrioventricular nodal ablation, pacemaker and pharmacologic agents effectively.

Objective To summarize MSCT manifestations of normal small bowel with oral water and colon water enema double-filling. Methods Small bowel parameters of 44 healthy volunteers were measured with oral water and colon water enema double-filling. The parameters included bowel wall thickness, diameter of filling bowel, bowel wall delamination, bowel wall CT attenuation, the number of the plica, the attenuation of mesenteric fat, mesenteric vessels, the appearance rate of lymph node in mesentery, retroperitoneum, and so on. Results The average bowel thickness was (1.72±0.20) mm; the average diameter of filling bowel was (21.24±3.05) mm; the average CT attenuation of plain scan, artery phase and portal phase was (28.13±0.38) HU, (55.42±0.88) HU and (67.86±0.94) HU. Jejunum plica of normal small intestine was 2.29/cm; the number of the mesenteric artery bowel was 2.59/cm; the average attenuation of mesenteric fat was-98.57 HU; the single layer of bowel changed mostly. Conclusion Proper knowledge of normal manifestations of small bowel on MSCT is helpful for the diagnosis of small bowel diseases.

ObjectiveTo find out the inhibitory effects of CD4 - CD8 - DNT cells on growth of which depresses the pancreatic cancer in vitro and in vivo.Methods The inhibitory effects of DNT cells on the growth of Panc- 1 were studied in vitro by MTT method.Eighteen BALB/c mice were divided into 3 groups randomly.Human pancreatic cancer xenografts were established in 2 groups randomly.The last group was injected the cell suspension which comprises DNT and Panc- 1 cells ( Panc- 1∶ DNT =1∶ 5 ).When the diameter of tumor was about 5 mm,the first 2 group mice were further divided into 2 groups randomly.One was control,treated with distilled water.The other was treated with celebrex (4 mg/d).The size of the tumors was calculated every 2 weeks and tumor growth curve was depicted.At the end of the treatments,the mice were sacrific and the tumors were harvested.The tumor inhibition rate was calculated.Results( 1 ) MTT study showed that DNT cells produced a dose- dependent inhibition of Panc- 1 proliferation in vitro.(2) The growth of transplanted pancreatic cancer was down-regulated by treatment of DNT cells.ConclusionDNT cells can inhibit the growth of pancreatic cancer in vitro and in vivo.

ObjectiveTo summarize the clinical features and surgical outcomes in solid pseudopapillary tumor of pancreas.MethodsA retrospective clinical analysis was made on 18 cases of solid pseudopapillary tumor of pancreas confirmed by pathological diagnosis from Jan.2000 to Feb.2011.ResultsThe median age of these cases was 27.8 years,ranging from 15 to 46 years.Fifteen cases were female and 3 cases were male.The size of the tumor ranged from 4.0 cm to 15.0 cm,with an average size of 7.1 cm.Eleven of 18 tumors(61.1％ ) had a well-defined capsule,and 5 tumors (27.8％ ) extended beyond the pancreas.Nine of the 18 tumors (50.0％) had a cystic component,and calcification was observed in 3 tumors ( 16.7％ ).The frequency of microscopic venous invasion,lymphatic invasion,and nerve invasion was 16％ (3 of 18),0 and 0 respectively.No lymph node involvement or liver metastasis was observed.Distal pancreatectomy plus splenectomy was done in 5 patients,spleen- preserving distal pancreatectomy in 3,medial pancreatectomy in 1,subtotal stomach- preserving pancreatoduodenectomy in 1,enucleation in 9.Fifteen patients were still alive without recurrent disease or metastasis after a median follow-up of 48 months.Conclusions These results demonstrated that solid pseudopapillary tumor of pancreas occurs mainly in young women,patients with solid pseudopapillary tumor of the pancreas had a favorable outcome after surgical treatment,including enucleation.

Child, Preschool ; Epilepsy, Rolandic ; diagnosis ; drug therapy ; physiopathology ; Humans ; Male ; Prognosis ; Steroids ; therapeutic use ; Treatment Outcome

ObjectiveA comparative proteomic method was used to analyse serum proteins between pancreatic cancer patients and control group,and to find a new protential specific marker.MethodsComparative analysis on the pancreatic peripheral blood protein profiling from 40 pancreatic cancer patients,10 chronic pancreatitis patients,10 benign tumor patients and 40 cancer-free controls was carried out by 2D differential gel electrophoresis,and differentially expressed proteins were identified by matrix-assisted laser desorption/ionization time of flight mass spectrometry.ResultsTwo differentially expressed proteins:transthyretin and apolipoprotein E were identified.Those proteins were highly expressed in pancreatic carcinoma group compared with normal control group,chronic pancreatitis group and benign tumor group.Conclusion2D differential gel electrophoresis and matrix-assisted laser desorption/ionization time of flight mass spectrometry technology in screening specific serum biomarkers of pancreatic cancer has a well repeatability and stability.The identified protein transthyretin in this study may be as specific serum biomarkers of pancreatic carcinoma.

The new intein-mediated PHB purify protein system is a high expression, automatic cutting, for purification, low-cost protein purification system,it is conducive to large-scale protein purification.Choose human antibacterial peptide LL-37 as the purification objects,which is poison to prokaryotic cell.We construct intein-mediated PHB purified human antimicrobial peptide LL-37 system through genetic engineering technology and use this system to purify LL-37. The results show that this system can highly express LL-37 fusion protein and purifiy the product as same size with expectations.

Pancreatic cancer is a commonly malignant gastrointestinal tumor with an significantly increasing incidence.Those patients without nonspecific symptoms at early stage had mostly lost the opportunity of surgical therapy when pancreatic cancer was detected at advanced stage,and its prognosis is poor.Therefore,it is rather important to improve the early diagnosis of pancreatic cancer.In recent years,proteomics is developing rapidly.Proteomics technologies have been widely used in clinical research.Using proteomics technology screening pancreatic cancer tumor markers becomes the research focus,thus we try to find a kind of or a group of pancreatic tumor markers,so as to improve the diagnosis of pancreatic cancer.

The aim of this study was to purify and characterize a keratinase produced by a new isolated Bacillus subtilis KD-N2 strain. The keratinase produced by the isolate was purified using ammonium sulphate precipitation, Sephadex G-75 and DEAE (diethylaminoethyl)-Sepharose chromatographic techniques. The purified enzyme was shown to have a molecular mass of 30.5 kDa, as determined by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis. The optimum pH at 50 degrees C was 8.5 and the optimum temperature at pH 8.5 was 55 degrees C. The keratinase was partially inactivated by some metal ions, organic solvents and serine protease inhibitor phenylmethanesulfonyl fluoride (PMSF). Sodium dodecyl sulfate (SDS) and ethylene diamine tetraacetic acid (EDTA) had positive effect on the keratinase activity. Reducing agents including dithiothreitol (DTT), mercaptoethanol, L-cysteine, sodium sulphite, as well as chemicals of SDS, ammonium sulfamate and dimethylsulfoxide (DMSO) stimulated the enzyme activity upon a feather meal substrate. Besides feather keratin, the enzyme is active upon the soluble proteins ovalbumin, bovine serum albumin (BSA), casein and insoluble ones as sheep wool and human hair. Calf hair, silk and collagen could not be hydrolyzed by the keratinase.
Bacillus subtilis ; classification ; enzymology ; Enzyme Activation ; Enzyme Stability ; Peptide Hydrolases ; chemistry ; isolation & purification ; Species Specificity ; Substrate Specificity