OBJECTIVE: To establish a method for determining the entrapment efficiency of gemcitabine hydrochloride liposomes(GHL).METHODS: The liposome and the free gemcitabine hydrochloride were separated by ultrafiltration,and the content of free gemcitabine hydrochloride was determined by HPLC.The entrapment efficiency of gemcitabine hydrochloride liposomes was computed as well.RESULTS: The recovery rate in ultrafiltration methods was 97.8%～100.1% for blank substance versus 99.0%～100.1% for sample.The linear range of gemcitabine hydrochloride was 1.0～80.0 mg?L-1(r=0.999 3) and its average recovery rate was 98.7～101.2%,and its inter-day and intra-day RSD were all less than 3% and its average entrapment efficiency was 81.21%.CONCLUSION: The method is simple,accurate and applicable for the determination of the entrapment efficiency of gemcitabine hydrochloride liposomes.

Objective Through investigation of children fluorosis illness,family households improved stoves and related life styles,to provide a scientific basis for sustainable control of endemic fluorosis.Methods In 2013,in Huishui County and Baiyun District,3 towns were selected in each county(district),and 3 villages were selected in each town.All 8-12 years old children in the school of these villages were checked dental fluorosis,which was diagnosed according to Dental Fluorosis Diagnosis (WS/T 208-2011); at the same time,10 families were selected to survey the situation of improved stoves and related life styles.Results Dental fluorosis detection rate of 8-12 years old children in Huishui and Baiyun were 2.75％ (23/836) and 2.26％ (11/487),which were all lower than 30％.Qualified rate of improved stoves and qualified stoves correct utilization rate were all 100.0％ (90/90).For human consumption,the correct rate of corn drying was 100.0％ (90/90) ; the correct rates of chili drying were 98.9％ (89/90) and 100.0％ (90/90).Conclusions The prevention effect is obvious,which has reached the control standards.We should continue to improve the long-term mechanism of comprehensive control measures,and to achieve substantial elimination of coal-burning endemic fluorosis.

Objective:To explore the effects of cysteine-rich 6 1 (Cyr6 1 )on biological behavior of human adenoid cystic carcinoma ACC-LM and ACC2 cells.Methods:The chemically synthesized Cyr6 1-siRNA was transfected into ACC-LM and ACC2 cells.Cell proliferation was measured by the MTT method,the invasive ability was evaluated by Transwell chamber assay,and cell apoptosis was analyzed using flow cytometry by double staining with Annexin V and propidium iodide.Results:Cyr61-siRNA significantly down-regu-lated Cyr61 protein expression in ACC-LMand ACC2 cells.Cyr61-siRNA markedly inhibited the proliferation and invasion of the cells, however,there was no significant difference in cell apoptosis between Cyr6 1-siRNA and control groups.Conclusion:Cyr6 1 promote the proliferation and invasion of adenoid cystic cancer cells.

Objective:To explore the effect of siRNA targeting myeloid cell leukemia-1(Mcl-1)on the biological behavior of salivary adenoid cystic carcinoma cells.Methods:The chemically synthesized Mcl-1-siRNA was transfected into salivary adenoid cystic carci-noma SACC-2 cells.The expression levels of Mcl-1-mRNA and Mcl-1protein were examined by Real-time PCR and western blotting respectively.MTT assay,transwell chamber and flow cytometry were used to determine the effect of Mcl-1-siRNA on SACC-2 cell pro-liferation,migration and apoptosis.Results:Compared with the control group,liposome group and NC-siRNA group,SACC-2 cell proliferation rate of Mcl-1-siRNA group was obviously slowed down.48 h after transfection,the migration of SACC-2 cells in Mcl-1-siRNA group(39 ±9.0)were lower than that in control group(69 ±6.0).The apoptosis rate of Mcl-1-siRNA group(8.6%)was sig-nificantly higher than that in control group(1.9%).Conclusion:Silence Mcl-1 can inhibit cell proliferation and migration and pro-mote apoptosis of salivary adenoid cystic carcinoma cells.

Objective:To investigate the effects of IGF-1 and IL-1β on the proliferation and apoptosis of cultured human condylar chondrocytes( CCs) of temporomandibular joint( TMJ) . Methods:Cultured CCs were derived from human TMJ condylar cartilage tis-sue, and identified by immunocytochemistry staining. The cultured cells were divided into 6 groups:control group, IL-1β(10 μg/L) group and IL-1 group (10 μg/L) + IGF-1 group (0, 1, 10, 50 and 100 μg/L, respectively). The cell proliferation ability was de-tected by MTT assay. The cell cycle and apoptosis were detected by flow cytometry. The expression of apoptosis-associated factors Bcl-2, Bax and p38 MAPK/NF-κB proteins were detected by Western blot. Results:Type II collagen was positively expressed in cultured CCs. IL-1β treatment decreased cell proliferation, increased cell apoptosis with concomitant increase of the percentage of early apopto-sis and late apoptotic cells, increased Caspase-3 expression, decreased Bcl-2/Bax ratio, and increased the expression of p38 MAPK/NF-κB proteins. Whereas, with 1-100 μg/L IGF-1 pretreatment, the proliferation ability and Bcl-2/Bax ratio of the cells were in-creased(P<0. 05), the apoptotic cells were decreased, the expression of Caspase-3 and p38 MAPK/NF-κB proteins was decreased ( P<0. 05) in a dose-dependent manner. Conclusion:IGF-1 may inhibit IL-1β-induced cell apoptosis and attenuate the activation of p38 MAPK/NF-κB of human condylar chondrocytes.

Objective:To investigate the effect of c-fos on the proliferation and migration of oral squamous cell carcinoma and potential mechansism.Methods:The expression of c-fos,CyclinD1 and p16 in 60 oral squamous cell carcinoma samples and 60 oral mucosa tissue samples was examined by immunohistochemistry.HN6 and SCC9 cells were respectively transfected with siRNA-c-fos and siRNA-scramble,then were respectively divided into control group,siRNA-scramble group and siRNA-c-fos group.The mRNA and protein expressions of CyclinD1 and p16 were decteted,meanwhile cell proliferation and migration were tested.Results:Compared with the oral mucosa tissue samples,the expressions of CyclinD1 and c-fos were increased in the carcinoma samples,while the expression of p16 was reduced.Compared with control group,the expressions of CyclinD1 in siRNA-c-fos group were significantly reduced,while p16 enpression was increased,with the inhibition of cell proliferation and migration.Conclusion:c-fos may regulate pl6/CyclinD1 signaling pathways and promote the proliferation and migration of oral squamous cell carcinoma.

Objective To evaluate the effect of chemoradiotherapy for stage Ⅲ non small cell lung cancer (NSCLC). Methods From January 1995 to December 2000, 132 patients with stage Ⅲ NSCLC were randomized into two groups: radiotherapy alone group (RT, 65 patioents), treated by conventional fractionation to a total dose of D_T 60?Gy～70?Gy/6 w～7 w; Chemoradiotherapy group (CRT, 67 patients), with chemotherapy given concomitantly or alternately with RT for at least 2 courses. Results Complete response rates of RT and CRT group were 14% and 27%, respectively. Disease progression rates of the two groups were 18% and 13%. The 1-,3-and 5-year survival rates were 62.1%, 22.7%, 9.3%and 52.7%, 9.3%, 6.9% in CRT and RT groups(P

Objective To study the influences of the length of sexual abstinence on sperm parameters and seminal plasma biochemical indicator.Methods Sperm concentration and motility were detected by computer assisted sperm analysis(CASA).The sperm morphology was analyzed using semiautomatic sperm morphology analyzer.Seminal plasma fructose concentration,neutral a-glycosidase,zinc,and acid phosphates concentration were measured by spectrophotometer.Improved DTNB was conducted for detection of the content of seminal plasma novain.Prostatespecific antigen(PSA)was measured with commercial kit.Three groups were defined according to the days of sexual abstinence:G1(1-3 days),G2(4-5 days)and G3(＞6 days).Results Sperm concentration of G2 was significantly higher than that of G1(P＜0.01),and of G3 than that of G1 and G2(P＜0.01).Sperm motility and per centage of morphologically normal sperm of G3 were significantly lower than that of G1(P＜0.01).Seminal plasma fructose concentration of G3 was significantly lower than that of G1 and G2(P＜0.01,P＜0.05).Seminal plasma neutral a-glycosidase,carnutine,zinc concentration of G3 was significantly higher than that of G1 and G2(P＜0.01,P＜0.05).Conclusion The length of sexual abstinence can influence sperm parameters and seminal plasma biochemical indicator.

Neuroendocrine tumors of the gallbladder(GB-NET) are rare, and it lacks early clinical manifestations and has no specific tumor markers, it is difficult to distinguish GB-NET from gallbladder adenocarcinoma. The diagnosis of GB-NET is based on histopathology of the tumor and the assessment of proliferation fraction, which makes it difficult to achieve early diagnosis. GB-NET has a high degree of malignancy, 32.39% of patients have liver metastases at diagnosis, and 51.60% of patients have lymph node metastases, the median survival time is 9 to 10 months.There are currently no specific guidelines or consensus for the treatment of GB-NET. The treatment strategies are choosen mainly by the principles of gallbladder adenocarcinoma. We reviews the clinical and basic researches of GB-NET and case reports from China and across the world, as well as the data from SEER database, and we discuss the research progress on the classification, clinicopathological features, diagnosis, treatment advances and the prognosis.

Phe) polymorphism and GD in Han population of Chongqing area.