Objective To evaluate the effects of antiviral therapy in prevention of tumor recurrence after curative treatment for patients with hepatocellular carcinoma (HCC). Methods Between Apr. 2006 and Jun. 2009,60 patients undergone curative treatment for HCC were enrolled in the retrospective analysis. Patients were assigned into four groups (15 each):patients in groupⅠ(serum HBV-DNA≥1.0?105copies/ml) and groupⅡ(serum HBV-DNA

Objective To evaluate the apical sealing ability of iRoot SP root canal sealer in oval-root canal. Methods After root canals were instrumented by Mtwo, 28 premolars with oval-root canal were randomly divided into 2 groups, 14 teeth in each. The root canals were obturated with AH Plus (group A) and iRoot SP (group B) by modified continuous wave condensation technique. The apical leakage was evaluated by dye penetration method and transparent teeth technique. Results Mean depth of leakage was (0.92 ± 0.26) mm for group A and (0.84 ± 0.40) mm for group B. There was no significant difference between the two groups (t=0.506, P > 0.05). Conclusion The apical sealing ability of iRoot SP is equivalent to AH Plus in oval-root canal.

Exosome is a self-secreted phospholipid bilayer nanovesicles, and has shown great potential in drug delivery field due to the important advantages of low immunogenicity and homologous targeting. Phototherapy, mainly includes photodynamic therapy (PDT) and photothermal therapy (PTT), utilize light to activate photoactive drug for tumor cell killing. The advanced therapeutic strategy shows low toxic side-effect and non-invasion precise advantages, and thus has made great progress in tumor treatment over the past few years. Therefore, using exosomes as a drug delivery system to deliver phototherapeutic agents can improve therapeutic performances with a reduced side-effect, and further enhance their application potential for clinical tumor therapy. This review focus on the rising cross-subjects field involving exosomes and phototherapy, and mainly introduce the research progress and relative case of exosomes-based delivery system for cancer phototherapy. Additionally, the advantages and challenges of exosome-based phototherapy are also discussed and proposed.

Objective To study the preventive effects of vitamin K2 on tumor recurrence in patients with hepatocellalar carcinoma (HCC) after radical resection. Methods The clinical data of 50 patients with HCC who received radical resection from March 2006 to March 2007 in No. 181 Hospital of PLA were analyzed retrospec-tively. All the patients were divided into 2 groups according to the random number table. Twenty-six patients in vitamin K2 group were administered with menatetrenone (45 mg per day), and the rest 24 pateints were in the control group. The accumulative and tumor-free survival rates, differences between the 2 groups, multivariate factors for prognosis were analyzed by Kaplan-Meier curve, Log-rank test and Cox regression model, respectively. Results During a period of 36 month follow-up, 10 patients died and 28 had tunor recurrence. The 1-, 2-, 3-year accumulative survival rates were 96%, 92% and 83% in vitamin K2 group, and 96%, 82% and 63% in control group (χ2 = 3.61, P > 0.05). The 1-, 2-, 3-year tumor-free survival rates were 92%, 60% and 38% in vitamin K2 group, and 75%, 42% and 12% in control group, with significant difference between the 2 groups (χ2 =5.61, P <0.05). Univariate and multivariate Cox proportional hazard analysis showed that without taking menate-trenone, the preoperative level of alpha fetoprotein (AFP) ≥800 μg/L and vascular invasion were the indepen-dent risk factors for tumor recurrence. Conclusions Vitamin K2 has a suppressive effect on tumor recurrence of HCC, while patients with AFP≥800 μg/L before operation or with vascular invasion have poor prognosis.

Objective To study the diagnosis, treatment and prognosis of mixed thyroid malignant tumors. Methods Clinical data of 7 cases with merged different histological types of thyroid malignant tumor treated from January 1977 to December 2006 were retrospectively analyzed. Results Merged different histologic types of thyroid malignant tumor accounted for 0. 14% of all thyroid malignant tumors treated during this period. Preoperative imaging and laboratory data had no specific value in the diagnosis of this merged different histologic types of thyroid malignant tumors. Radical resection in combination of hormonal therapy and 131I radiotherapy achieved a satisfactory result, though thyroid malignant tumor combined with thyroid cancer usually predict a poor prognosis. Conclusions Merged different histologic types of thyroid malignant tumor is a rare clinical entity, with the pathogenesis being obscure and no consensus of opinion on its nomenclature. The prognosis depends on the highest ～ade among an individual group of malignant tumors.

With the development of functional genomics, high throughput analysis of genes’ function has been the mainstream of research, and exogenous gene's over expression via Agrobacterium-mediated transformation is the most commonly used method in gene functional analysis.The versatile plant expression vector cassette named pBHT-5 was constructed by the method of site-specific mutagenesis based on pBI121. First of all, the restriction enzyme SfiI recognition site in trfA gene (X00713) which was relevant to plasmid replication and stability was replaced without changing its amino acid composition. And then the SfiIA,SfiIB sites were added between promoter CaMV35s and terminator NOS. The versatile plant expression vector cassette can be directly used to construct plant expression vector containing the full-length genes cloned by Clontech SMARTTM technology, which will raise the efficiency of vector construction. The result will provide basis of new genes’ high throughput screening and functional analysis, then get the new genes functioning in plant osmotic stress resistance.

Objective:To investigate chemokine RANTES(Regulated upon Activation.Normal T cell Expressed and Secreted)expression in the chronic graft versus host disease(GVHD) murine lupus nephritis model and effect of the recipe of LangChuangFang on it.Methods:A microwave based immunohistochemistry(SP) and RT PCR were used to detect the expression of RANTES in the kidney of model,therapeutic group and normal control.At the same time,the correlation between expression of RANTES and renal injures in model was examined.Results:LangChuangFang protected renal function,which was coincided with amelioration of pathologic lesions especially tubulointersitial injury.This was associated with the amelioration of RANTES protein and mRNA expression in model.Conclusion:RANTES involved in the process of renal injury in vivo,LangChuangFang can treat lupus as immunosuppressive agent by decreasing RANTES production.

Objective To discuss causes and corresponding prevention for groin pain occurred early after total hip arthroplasty(THA).Methods A retrospective study was done on 189 cases(193 hips)treated with THA including unilateral procedures in 185 hips and bilateral procedures in eight hips to analyze common causes for early groin pain.Results Groin pain was found in 9.3% hips(18/ 193)during hospital stay,including 1.6%(3 cases)with deep infection,1.6%(3 cases)with incision infection,1%(2 cases)with posterior dislocation,4.1%(8 cases)with leg lengthening and 1%(2 cases)with hematoma.Conclusions Despite of the numerous diagnostic alternatives available to the orthopedic surgeon,detailed history,careful physical examination,necessary laboratory and imaging stud- ies can contribute to a correct determination of causes for groin pain.Meanwhile,appropriate indication, accurate preoperative radiographic measurement,intraoperative standardized surgical procedures and per- fect rehabilitation are necessary to avoid complications.

Objective To investigate the feasibility of using optical coherence tomography (OCT)in thy-roid surgery .Methods Surgical specimen including parathyroid gland , lymph nodes , adipose tissue and thyroid tissue from patients receiving thyroid surgery in Tianjin Medical University Cancer Institute and Hospital were col -lected.OCT images were collected and the results were compared with the routine examination .Results Para-thyroid glands , lymph nodes , adipose tissue , and thyroid tissue can be obtained high-resolution OCT images .Dif-ferent tissues and metastatic lymph node can be clearly distinguished .OCT imaging took about 1 minute and fro-zen examination cost about 25 minutes.Conclusions OCT is a time-saving, non-invasive and cross-sectional imaging technique .It can obtain clear structural images of the internal microstructure of bio-tissues.OCT technol-ogy used in thyroid surgery including parathyroid identification and determination of lymph node metastasis is fea -sible.

ObjectiveTo investigate the association between fasting blood glucose and the risk of cholelithiasis. MethodsA total of 87513 individuals who underwent fasting blood glucose test and liver/biliary ultrasound in health examination in Kailuan from 2006 to 2007 were enrolled as subjects, and according to the results of blood glucose test, the subjects were divided into normal blood glucose group with 73456 subjects, impaired fasting blood glucose group with 7165 subjects, and diabetic group with 6892 subjects. The log-rank test was used to compare the cumulative incidence rate of cholelithiasis between groups; the Cox proportional hazards model was used to analyze the influence of different levels of fasting blood glucose on new-onset cholelithiasis and calculate hazard ratio (HR) and 95% confidence interval (CI); a stratified analysis was used to compare the risk of cholelithiasis between the individuals with different levels of fasting blood glucose in the groups with different sexes, blood lipid levels, and levels of body mass index (BMI). A one-way analysis of variance was used for comparison of normally distributed continuous data between multiple groups, and the Kruskal-Wallis H test was used for comparison of continuous data with skewed distribution between multiple groups. The chi-square test was used for comparison of categorical data between groups. ResultsThere was a significant difference in the cumulative incidence rate of cholelithiasis between the normal blood glucose group, the impaired fasting blood glucose group, and the diabetic group (10.91% vs 12.17% vs 18.86%, χ2=27.94, P＜0.05). After the continuous adjustment for the other factors in the Cox proportional hazards model analysis, compared with the normal blood glucose group, the impaired fasting blood glucose group had a risk of new-onset cholelithiasis of 0.97(95%CI: 0.85-1.11, P=0.587), and the diabetic group had a risk of new-onset cholelithiasis of 1.15(95%CI: 1.01-1.30, P=0.019). The stratified analysis showed that diabetes was a risk factor for new-onset cholelithiasis in male individuals (HR=1.16, 95%CI: 1.01-1.33, P=0.043), individuals with normal blood lipids (HR=1.22, 95%CI: 1.01-1.49, P=0.044), and individuals with overweight based on BMI (HR=1.16, 95%CI: 1.01-1.35, P=0.048). ConclusionDiabetes can increase the risk of cholelithiasis. Diabetes is an independent risk factor for cholelithiasis in men, individuals with normal blood lipids, and individuals with overweight based on BMI.