ObjectiveTo explore the application of diffusion-weighted magnetic resonance imaging (DWMRI) in precise radiotherapy of esophageal carcinoma.MethodsThirty-seven patients with biopsy proven esophageal cancer from March 2010 to January 2011 were included.To delineate the gross tumor volume (GTV) using CT and DWMRI images,each patient was examined by DWMRI and CT scan using the same position before radiotherapy.To compare the maximum diameters and volumes of tumor between CT and DWMRI. The tumor lengths measured by esophagogram,esophagoscope,CT and DWMRI were compared.ResultsTumor lengths under esophagogram,esophagoscope,CT and DWMRI were 5.70 cm,6.06 cm,7.97 cm and 5.79 cm respectively. The lengths between CT and esophagogram,CT and esophagoscope,CT and DWMRI had statistical significance respectively (F=4.88,P=0.003).The maximum diameters of tumor shown on CT and DWMRI were 3.79 cm and 3.81 cm respectively ( t =-0.32,P=0.751 ).The GTV were 45.75 cm3 and 38.05 cm3 in CT and DWMRI respectively (t=5.30,P =0.001 ).53 lymph nodes were assessed positive on both CT and DWMRI.DWMRI excluded 25 positive lymph nodes assesed by CT; also confirmed 15 negative lymph nodes excluded by CT,6 of which were paraesophageal lymph nodes.The addition of DWMRI information altered the clinical stage in 6 patients.ConclusionsTumor lengths measured on DWMRI and esophagogram had the optimal approximation.It was easy to find paraesophageal lymph nodes via DWMRI.With the addition of DWMRI information,the target range and clinical stage were alerted in some patients.

ObjectiveTo analyze the prognosis of 784 patients according with clinical staging of esophageal carcinoma treated with non-surgical methods,investigate the predictive value and deficiency of the clinical staging.MethodsFrom July 2003 to January 2009,784 patients with esophageal carcinoma received 3DCRT treatment.The prescribed doses ranged from 50 Gy-70 Gy with median dose of 60 Gy,1.8-2.0 Gy/fraction,1 fraction/day,5 fractions/week.65 patients received prescription dose of＜60 Gy and all the others'≥60 Gy.All the patients were divided into subgroups according to different T,N and TNM stages.Therapeutic effect was evaluated.ResultsThe follow up rate was 97.1％,503 patients were followed up for more than 3 years and 122 were followed up for more than 5 years.The 1-,3-,5-year local control rates and overall survival rates were 77.2％,54.2％,46.5％ and 69.5％,34.9％,23.9％,respectively,with median survival time of 21 months.There were significant differences of survival curves for different T stages,N stages and TNM stages.For the groups of stage Ⅰ,Ⅱ and Ⅲ,the 1-,3-,5-year survival rates were 86.4％,47.6％,45.1％ ;84.7％,46.3％,36.4％ and 64.0％,30.9％,19.1％,respectively ( x2 =29.34,P =0.000).There were 752 patients with squamous cell carcinoma ( 95.9％ )and 32 patients with non-squamous cell carcinoma (4.1％ ),the median survival time were 21 and 16 months,respectively ( x2 =4.44,P =0.035 ).There were significant difference of survival rates for the subgroups whose GTV volume ≤20 cm3,20 -40 cm3,40 -60 cm3 and ＞60 cm3 (54 months,29 months,21months and 14months,x2 =68.71,P =0.000).ConclusionsThe clinical staging of esophageal carcinoma treated with non-surgical methods could predict the prognosis accurately,for patients with different pathology and GTV volumes,there were variance in the prognosis,so we advised the complement of the two factors in the draft of clinical stages.

Objective To observe the acute side effects, local control rate and survival rate of concurrent chemoradiotherapy (CC) and radiotherapy alone (R) for patients with esophageal carcinoma.Methods From June 2006 to February 2009, 209 patients with esophageal carcinoma were observed, 105 of them were treated with CC.Of all the patients, 117 received three-dimensional conformal radiotherapy, 92 received intensity modulated radiotherapy, the median prescription dose was 60 Gy.The regimen of LFP (5-FU, cisplatin and calcium folinate) was selected for this study, side effects, local control rate and survival rate were observed and subsets analysis were performed.Results The overall follow-up rate was 99.0%,there were 99 and 44 patients whose follow-up time was more than 2 and 3 years, respectively;for the CC group, the data were 45 and 14, respectively;and for the R group, 54 and 30, respectively.The 1-,2-,3-year local control rates of CC group and R group were 88.1%,69.2%,66.2% and 81.0%,64.0%,54.9%(χ2=2.31,P=0.128), respectively.The 1-,2-,3-year overall survival rates of CC group and R group were 84.4%,52.9%,45.6% and 75.2%,50.7%,37.0%(χ2=1.57,P=0.210),respectively.Subset analysis indicated that for the patients of N0 group and whose length of GTV>7 cm, the local control rate of CC was significantly higher than that of radiotherapy alone (χ2=5.11,7.66;P=0.024, 0.006).For N0 group, the survival rate of CC was higher than that of R alone.(χ2=5.07,P=0.024).The incidence of WBC, PLT and HGB reduction for the two groups were 81.9% and 49.0%(χ2=36.45,P=0.000),14.3% and 1.9%(χ2=10.54,P=0.006),and 24.8% and 2.9%(χ2=22.95,P=0.000),respectively.The incidence of nausea, vomiting and constipation for the two groups were 63.8% and 7.7%(χ2=71.52,P=0.000), respectively.The incidence of ≥2 grade esophagitis of CC group and R group were 48.57% and 38.46%(χ2=2.17,P=0.141), respectively.The incidence of ≥2 grade radiation pneumonitis of CC group and R group were 15.24% and 7.69%(8/104)(χ2=2.93,P=0.087),respectively.ConclusionsCompared to radiotherapy alone, the local control rate and overall survival rate of concurrent chemoradiotherapy were not improved significantly, the patients with N0 may be the conspicuous beneficiary.About side effects, only marrow depression and gastrointestinal tract reaction were significantly different between the two groups,the value of addition of concurrent chemoradiotherapy for esophageal carcinoma needs further investigation.

Objective To analyze the risk factors of bile duct injuries in laparoscopic cholecystectomy.Methods The clinical data of 11 243 patients who underwent laparoscopic cholecystectomy between October 1992 and December 2013 in the Xianyang Center Hospital were studied retrospectively.The risk factors of bile duct injuries were analyzed using the Chi-square test to determine the independent risk factors of bile duct injuries.Results Univariate analysis showed that bile duct injuries were associated with male,age ≥65 years,BMI ≥25 kg/m2,staging of inflammation,gallbladder atrophy on ultrasonography,thickness of gallbladder wall on ultrasonography,anatomy of Calot 's triangle and operator's experience (all P ＜ 0.05).Multi-factor and non conditional Logistic regression analyses showed that the independent risk factors of bile duct injury were old men,gallbladder atrophy,anatomy of Calot's triangle and operator's experience (All P ＜ 0.05).Conclusion Old men,gallbladder atrophy,anatomy of Calot's triangle and operator's experience were independent risk factors of bile duct injuries.

Objective To observe the relationship between computed tomography-gross tumor volume (GTV) and non-surgical T stage in patients with esophageal squamous cell carcinoma (ESCC) and the survival rates of patients with different GTVs,and to investigate the impact of GTV on the prognosis of ESCC after three-dimensional radiotherapy.Methods A retrospective analysis was performed on 223 ESCC patients without lymph node metastasis and distant metastasis who were hospitalized from July 2003 to January 2009.The prescribed doses of three-dimensional radiotherapy ranged from 50-70 Gy.These patients were divided into 3 or 4 groups according to different percentile intervals of GTVs.The Spearman rank correlation analysis was used for investigating the relationship between non-surgical T stage and GTV.The Kaplan-Meier method was used for calculating survival rates,and the log-rank test was used for survival difference analysis.Results The follow-up rate was 98.2％.A total of 163 patients were followed up for at least 3 years.The median GTVs of patients with T1 +2 ESCC,T3 ESCC,and T4 ESCC were 19.31 cm3,33.69 cm3,and 41.25 cm3,respectively,exhibiting a positive correlation between non-surgical T stage and GTV (P =0.000).The 5-year survival rates were 59％,43％,and 24％ (P =0.000) in 3 GTV-based groups and were 55％,51％,31％,and 24％ (P =0.004) in 4 GTV-based groups.The primary cause of death for the patients with GTVs of ≤35 cm3 and ＞35 cm3 was failure of local control (57.9％ vs 52.1％) ; 21.9％ and 13.8％ of the patients with a GTV of ＞ 35 cm3 died of uncontrol and excessive bleeding,versus 9.4％ and 3.1％ of the patients with a GTV of ≤ 35 cm3 (P =0.046 ; P =0.029) ;2 of the patients with a GTV of ＞ 35 cm3 died of grade 5 radiation pneumonitis.Conclusions GTV is positively correlated with nonsurgical T stage in esophageal cancer patients who receive radiotherapy.The 3-level and 4-level grading of GTV can be used for prognostic evaluation,and the 3-level grading of GTV is more closely related to prognosis.The patients with a larger GTV have higher incidence of uncontrol and bleeding and risk of treatment-related death than those with a smaller GTV after radiotherapy.

To construct a scFv library by phage display technique from the spleen cells of mice immunized with B3HM cells. Three mice were immunized with B3HM cells, and their spleen cells were harvested. The genes of VH and Vk were amplified by RT-PCR from the cDNA of the immunized spleen cells and a scFv-phage display antibody library was constructed. The capacity of library was measured,and the variety of the library was analyzed by digesting with restriction endonuclease BstNI.ScFv phage clones were randomly picked and identified phage-scFv clone by binding B3HM cells using immunofluorescein.A scFv library containing 5?106 individual clones which showed different patterns after digested with restriction endonuclease BstNI was produced. Individnal phage-scFv clone showed B3HM cells positive using immunofluorescein. A scFv library of anti-B3HM cell surface molecules has been constructed. It will be useful for finding out some novel genes of causing leukemia, and establishs the infarctate foundation of clarifying the pathogenesis of leukemiagenesis.

The diagnosis,surgical treatment,and comprehensive treatment of renal cell carcinoma with inferior vena cava tumor thrombus have advanced rapidly in recent years. Both the survival and quality of life of the patients have remarkably improved. Further advance in basic research may provide new direction of management of renal cell carcinoma.
Carcinoma, Renal Cell ; complications ; diagnosis ; therapy ; Embolism ; diagnosis ; etiology ; therapy ; Humans ; Kidney Neoplasms ; complications ; diagnosis ; therapy ; Venae Cavae

ObjectiveTo investigate the long term clinical result of three-dimensional radiotherapy for esophageal carcinoma,discuss the effect of correlative factors to survival and local control.Methods From July 2003 to December 2008,792 patients with esophageal cancer were eligible.Patients were treated with three-dimensional radiotherapy (672 patients) or intensity-modulated (120 patients) radiotherapy.The radiotherapy was delivered in 1.8-2.0 Gy per fraction,5 fractions per week,total dose of 50-70 Gy,(median,60 Gy).142 patients were treated by concurrent radiochemotherapy,and the other 650 patients radiotherapy alone.The local control rate and survival rate were calculated by Kaplan-Meier method.Logrank method was used for univariate analyses.Cox regression model was used for multivariate analyses.ResultsThe follow-up rate was 95.8％.The number of patients with 5 years time followed-up was 133.The 1-year,3-year and 5-year local control rates were 76.6％,53.2％,48.6％,and the 1-year,3-year and 5-year overall survival rates were 70.1％,36.7％ and 28.0％,respectively.There were significant influence on the prognosis of T stage,N stage,TNM stage,tumor volume ( x2 =20.58-55.60,all P =0.000).The Cox multivariate model showed that N stage and tumor volume were independent prognostic factors (x2 =6.35,29.23,P =0.012,0.000).For the two groups of concurrent chemo-radiotherapy and radiotherapy alone,5-year local control rates were 57.0％ and 46.8％ ( x2 =7.34,P =0.007 ),the 5-year overall survival rate 32.8％ and 27.6％ ( x2 =3.42,P =0.064.ConclusionsThree-dimensional radiotherapy is effective for esophageal carcinoma.It might improve the local control rate and overall survival rate to some extent.T staging,N staging,TNM staging and tumor volume were important prognostic factors for long-term survival.The addition of concurrent radiochemotherapy could improve local control rates.

OBJECTIVETo study the effect of PF4 on the adherence of leukemic CD34+ KG1a cell to human umbilical vein endothelial cell line ECV-304 cell and on the expression of adhesive molecules.

METHODSAdhesion assay and adhesion blocking assay were respectively applied to measure the effect of PF4 and/or adhesion molecule monoclonal antibodies on the adhesion property of KG1a. The expressions of adhesion molecules were determined by RT-PCR and FACS analysis.

RESULTSThe adhesion of KG1a cells to ECV-304 was significantly enhanced in the presence of PF4. Such enhancement was also observed when KG1a or ECV-304 cells were separately treated with PF4 before interaction. The adhesion capacity of KG1a cells was reduced when cells were co-incubated with the blocking monoclonal antibodies (MoAbs) against CD49d, CD106, CD54, respectively. In contrast, MoAbs against CD62L, CD62P and CD62E had no such effect. During a period of 3 hours when KG1a or ECV-304 cells were respectively incubated with PF4, the mRNA expressions of CD49 d, CD54 were up-regulated. Furthermore, when KG1a or ECV-304 cells were incubated with PF4 for 2 hours, respectively, the percentages of CD49d+ KG1a cells and CD54+ ECV-304 were increased significantly.

CONCLUSIONPF4 can enhance KG1a cell adhesive capacity by increasing the expressions of adhesion molecules.

Antigens, CD34 ; metabolism ; Cell Adhesion ; drug effects ; Cell Adhesion Molecules ; metabolism ; Cell Line, Tumor ; Humans ; Leukemia, Myeloid, Acute ; immunology ; pathology ; Platelet Factor 4 ; pharmacology ; Umbilical Veins ; cytology

BACKGROUND:The therapeutic effectiveness on tendon injury is closely related to the material of tendon suture.
OBJECTIVE: To review the progress of tendon suture materials and tendon biomechnics in recent years.
METHODS:A computer-based search of CNKI (January 1999 to December 2014), and PubMed (January 1950 to December 2014) was performed for relevant articles using the keywords of “tendon, suture materials,
biomechanics” in Chinese and English, respectively.
RESULTS AND CONCLUSION:Ideal tendon repair refers to the restoration of the continuity of its anatomical structure, tensile strength and sliding function in physiology, which is influenced by many factors. Suture technique and choice of suture materials are two steps that cannot be ignored. With the development of surgical tendon suture technique, in order to improve the quality of tendon healing, ideal tendon suture is first to have sufficient strength to avoid an early tensile fracture; secondly, the elasticity cannot be too large that can cause a gap between suturing ends and affect tendon healing, and time for protecting the tendon strength is as long as possible. Therefore, the optimal choice of tendon suture materials should be based on suture methods and biomechanical characteristics of suture lines, thereby to promote tendon healing.