Objective　Standard method of testing serum fluoride was tested and verified by certified reference material CRM of free fluo ride component in cattle serum (GBW 09143～09144).The method was suited for fluor ide research to assess its practical value.Methods　ISE-standard curve,linear relationship,linear range,sensitive and precision were disired result by CRM.400 serum of fluoride in rats were measured.Results　The linear ranges of the method were 0.02～5.0 mg/L,r=0.9999,b=57.8,and test lower limit was 0.013 mg/L.The test value was equal to standard value.Conclusions　The standard method is accurate,sensitive,convenient and small sample is used;and it is easy to spread.Thus,it has been of practical value.

T is the etiologic mutation in this family.Screening of female carrier state and follow-up study of the confirmed carriers are important for X-liked DCM family.

Objective To review the experience of perioperative management and effect of valve replacement combined with renal dysfunction.Methods 536 cases of valve replacement.According to preoperative glomerular filtration rate(GFR),renal dysfunction was classified as normal in 322 cases,mild in 162,moderate in 40 and severe in 12.Logistic regression analysis was used to assess the effect of preoperative renal dysfunction on operative mortality and morbidity.Results Patients with a lower GFR were older and more likely to have hypertention.They also tended to have larger left ventricular end-diastolic diameter and worse left ventricular ejection factor.Operative mortality rose inversely with declining renal function,from 2％ for those with normal renal function to 17％ for patients with severe renal dysfunction.Renal dysfunction was significantly associated with a large blood transfusions,re-intubation,longer mechanical ventilation,intensive care unit stay and hospital stay.Conclusion Preoperative renal dysfunction is an important factor of postoperative mortality and morbidity for valve replacement.We must pay more attention to perioperative management.

50Gy gave better survivals.Conclusion Age,tumor histology,ex- tent of resection,interval time of postoperative radiotherapy and the dosage of target were related to survival.

Objective To investigate the diagnostic and therapeutic characteristics of prostate cancer with prostate specific antigen(PSA)4-10?g/L. Methods The data of prostate biopsies for the patients with PSA 4-10?g/L from May 1998 to February 2004 and the treatment and prognosis of these patients were retrospectively analyzed. Results In the 141 cases, 34 were diagnosed as prostate cancer, including 3 cT1, 21 cT2, 6 cT3 and 4 cT4. Mean Gleason score was 5.8, and the mean Gleason scores of cT1 and cT2 were significantly lower than those of cT3 and cT4. Twenty-four cases of cT1 and cT2 underwent radical prostatectomy. Four cases of cT3 recieved radical prostateetomy after 4 months of neoadjuvant endocrine therapy. Two cases of cT3 and 4 cT4 received castration. Pathological section from radical surgeries showed that 21 cases were organ confined and 7 were locally invasive. The difference of mean Gleason score between these two groups was significant in statistics. After 18 to 69 months (mean 42 months)follow-up, 21 organ confined cases were free survived, 4 locally invasive cases had biochemical recurrence and 1 case had multifocal bone metastasis. No cancer-specific death happened. Two of 4 cT4 cases were still alive and 2 died of the tumor. Conclusions Routine needle biopsy is necessary for the cases with“grave area”PSA of 4～10 ?g/L. Prostate cancers with PSA 4～10/?g/L are not always early diseases. Gleason score is a very important index for determine the stage of pathology after surgery. Radical prostatectomy is an effective treatment for organ confined disease.

Objective To compare the changes of retinal sensitivity of central 30? visual field after correction with spectacles with those before correction in juveniles and to provide data for the necessity of correction with spectacles in the measurement of juvenile central visual field. Methods The changes of the retinal sensitivity of central 30? visual field after correction with spectacles in 122 eyes of juveniles were measured using Humphrev 750 Ⅱ perimeter, and were compared with those before correction. Results All the myopic eyes of 122 juveniles passed the reliability of parameters. Among the detected eyes, 110 eyes showed degree dependent changes of the retinal sensitivity of central visual field. Conclusion Correction with spectacles should be used for the measurement of central visual field in juveniles. Otherwise, the results might be unreliable, especially in the cases with moderate and high myopia.

Objective To evaluate the effect of Rab23 on the proliferation of a squamous cell carcinoma cell line Sa3,and to investigate its mechanisms.Methods Cultured Sa3 cells were classified into four groups:normal control group transfected with green fluorescent protein (GFP),Rab23-overexpressing group transfected with a GFP-labelled Rab23-overexpressing plasmid,Rab23-silencing group transfected with a plasmid carrying a Rab23-targeting shRNA,empty vector group transfected with an empty vector.After additional culture for different durations,plate colony formation assay and flow cytometry were performed to evaluate the proliferative activity of Sa3 cells,and Western blot was conducted to detect the expression of Erl/phosphorylated-Erk in Sa3 cells.Statistical analysis was carried out by t test,one-way analysis of variance and Bonferroni's multiple comparison test.Results Stable Sa3 cell lines with overexpression or silencing of Rab23 were established by plasmid construction and lentivirus-mediated transfection.The plate colony formation assay showed that the colony formation rate was significantly lower in the Rab23-overexpressing group than in the normal control group (2.3％ ± 0.2％ vs.3.6％ ± 0.3％,P ＜ 0.05),but higher in the Rab23-silencing group than in the empty vector group (4.1％ ± 0.2％ vs.1.8％ ± 0.03％,P ＜ 0.01).Rab23 overexpression induced G1 phase arrest in Sa3 cells.The proliferation index was significantly decreased in the Rab23-overexpressing group compared with the normal control group (0.581 ± 0.035 vs.0.698 ± 0.018,P ＜ 0.05),but increased in the Rab23-silencing group compared with the empty vector group (0.567 ± 0.015 vs.0.444 ± 0.014,P ＜ 0.01).As Western blot showed,there were no significant changes in the expression of Erk in the Rab23-silencing or-overexpressing group compared with the normal control group,whereas the expression of p-Erk was attenuated in the Rab23-overexpressing group compared with the normal control group,but enhanced in the Rab23-silencing group compared with the empty vector group.Conclusions Rab23 could inhibit the proliferation of Sa3 cells,which may be associated with the Erk pathway.

The change in serum level of 8-hydroxy-deoxyguanosine (8-OHdG),an oxidative stress biomarker,in patients with active Graves' ophthalmopathy (GO) during corticosteroid treatment was observed.The serum level of 8-OHdG was significantly increased in patients with active GO as compared with that of normal controls and patients with Graves' disease (P ＜ 0.05).After systemic corticosteroid treatment,patients with GO showed significantly lowered 8-OHdG level as compared with that before treatment and patients with Graves' disease.These changes in serum 8-OHdG level were accompanied by decreases in clinical activity score (P ＜ 0.05) during corticosteroid treatment.Oxidative stress may play a role in the pathogenesis of GO.Serum 8-OHdG level may be used as an objective and quantitative parameter in patients with GO during immunosuppressive treatment.

BACKGROUND: Current numerous studies have confirmed that silver nanoparticles have been extensively applied due to their good anti-bacterial performances. OBJECTIVE: To summarize the overseas and domestic research and development of anti-bacterial silver coating based on the anti-bacterial mechanism and bio-safety of silver nanoparticles as wel as progression of anti-bacterial silver coating. METHODS: The first author retrieved the databases of Web of Science, PubMed and CNKI for relative articles published from January 1976 to January 2015. The keywords were “silver nanoparticles, titanium al oy, implant, antibacterial properties, biosecurity, coating” in English and Chinese, respectively. RESULTS AND CONCLUSION: Because of their smal dimension and quantum effects, as wel as great specific surface area, silver nanoparticles can be in close contact with pathogenic microorganisms to exert biological effects. Additional y, silver nanoparticles exhibit the excellent resistance to bacteria, fungi, viruses and cancer cel s. However, most of their mechanisms of biological effects remain unclear, and there are unresolved problems about the slow-release time of silver nanoparticles in vivo and how to control the slow-release silver ions. Besides, there are fewer long-term animal experiments. Therefore, a large number of laboratory and clinical studies are needed to ensure that silver nanoparticles cannot cause adverse reactions during long-term administration and how to reduce their toxicity.

OBJECTIVE: To explore the mechanism of venlafaxine, paroxetine and St. John's wort extract by comparing the changes of endogenous metabolites profile in rat serum. METHODS: These three drugs were employed to intervene in rats exposed to the chronic unpredictable mild stress (CUMS). Serum samples from all of rats were collected for a 1H-NMR metabolomics analysis to find the differences of metabolic profile. RESULTS: The resulting metabolic profiles demonstrated that these three antidepressants have an obvious difference effect on the endogenous metabolites in serum of the CUMS rats. It was also shown that the differential metabolites could be reversed in different degree. Six metabolites could be callback by venlafaxine while 4 metabolites by paroxetine and five metabolites by St. John's wort extract, in which lactate, choline, N-acetyl glycoprotein could be regulated to normal by all these three drugs. CONCLUSION: The different drugs have difference regulation on the type and level of the endogenous metabolites, but also have similarities, which can provide a reference for the better understanding of the mechanism of antidepressant drugs.