Objective To investigate the morbility and epidemic characteristics of hair dye dermatitis in individuals who dyed their hair in Tianjin.Methods Questionnaires were distributed to the outpatients in the Gerneral Hospital of Tianjin Medical University,students and teachers in Tianjin Medical University,residents in the community and customers in barber shop from Aug.2007 to Mar.2008.The personal data including the methods and site of coloring hair and something correlated to hair dyes were investigated.Results A total of 597 cases with the history of coloring hair were enrolled in the study,including 485 women and 112 men,with mean age of 41 years (ranged from 16- 74years).Among 597 cases,69 cases had allergic reactions to hair dye,including 51 women and 18 men,with mean age of 44 years (ranged from 19-65 years).The median age of the first coloring hair was 40 years (ranged from 3-50 years).The comparison between the sites of coloring hair had no statistic significance (P ＞0.05),but there was a significant difference between black dyed hairs and col or dyed hairs (P ＜0.05).Conclusions People with black hair dye are prone to be allergic.

Objective To investigate the relationship between polymorphism of arylamine N-acetyltransferase 2 (NAT2) and hair dye dermatitis in a Chinese population. Methods Polymorphism chain-restriction fragment length polymorphism (PCR-RFLP) was used and the wild-type allele (NAT2 * 4) and three mutant alleles (NAT2 * 5A, 6B and 7A) were determined in 60 patients with hair dye dermatitis and 73 age-matched control subjects in Tianjin region. Results In hair dye dermatitis cases, the frequency of NAT2 * 4, NAT2 * 5A, NAT2 * 6B, NAT2 * 7A was 52. 5 % , 5. 0 % ,26.7 % and 15. 8 %, respectively, and no statistically significant difference of the frequencies was found between the hair dye dermatitis patients and controls (P>0. 05). The frequency of rapid genotype, intermediate genotype and slow genotype was 26. 7 % , 51. 7 % and 21. 7 % in hair dye dermatitis cases, 30. 1 %, 50. 7 % and 19. 2 % in control subjects, respectively, and no statistically significant difference of the frequencies between the two groups (P>0. 05). Conclusions Our study suggests that there might be no relationship between polymorphism of NAT2 and genetic susceptibility to hair dye dermatitis in a Chinese population.

Objective To explore diagnostic value of the serum and urine procalcitonin (PCT) detecting in the urinary system infection.Methods The serum and urine PCT levels in 45 urinary system infection patients with clear pathological diagnosis (exclude other system infections) who were outpatiented or hospitalized in the People's Hospital of Zhongshan between March and November 2016 (including 21 cases of upper urinary tract infection and 24 cases of lower urinary tract infection) and 35 healthy adults who went through physical examinations at the hospital during the same period,were measured using electrochemiluminescence immunoassay (ECLIA) on Cobase 601 Immunoassay Analyzer and analyzed to compare the differences of PCT levels in the three groups.Results The urine PCT level in upper urinary tract infection group was 0.243± 0.123 ng/ml.It was significantly lower than lower urinary tract infection group (0.486±0.232 ng/ml,t=4.11,P=0.000) and control group (0.454± 0.253 ng/ml,t=3.96,P=0.000).The serum PCT level in upper urinary tract infection group was 0.062±0.014 ng/ml.It was obviously higher than that in lower urinary tract infection group (0.043±0.020 ng/ml,t=3.56,P=0.01) and control group (0.032±0.013 ng/ml,t=7.38,P=0.000).In all groups,the urine PCT levels were significantly higher than their serum PCT levels (t =9.48,9.12,6.79,P＜ 0.01),and significant differences were observed in them.The sensitivity,specificity,positive predictive value and negative predictive value of serum PCT for diagnosing upper urinary tract infections were 81.5％,84.2％,80.6％ and 85.6％ respectively,and the urine PCT were 86.4％,80.7％,88.4 ％ and 83.1 ％ respectively.Conclusion Detection of serum and urine PCT has important accessory diagnostic value for identifying upper and lower urinary tract infections.

Objective To estimate the prevalence of Glucose‐6‐phosphate dehydrogenase(G6PD) deficiency in Zhongshan area . Methods The activity of G6PD in red blood cells was determined by using ultra‐violet rate method for neonates ,couples of child‐bearing age and suspected patients who had clinical symptoms in Zhongshan area from 2012 to 2013 .Results The total detection rate of G6PD deficiency was 4 .37% (1 030/23 595);in male the detection rate was 9 .42% (513/5 447);in female the detection rate was 2 .85% (517/18 148) .Conclusion The incidence of G6PD deficiency were high in Zhongshan area .Therefore ,more attention should be paid to the screening of the disease in neonates and couples of childbearing age so as to reduce the incidence of G6PD defi‐ciency and prevent the complications caused by the disease .

Objective: To study the expression of hepatocyte growth factor(HGF) in acute pulmonary embolism, and the diagnostic value of HGF thereof. Methods: The acute autoblood pulmonary thromboembolism was used to establish rat pulmonary embolism model. There were blood plasma HGF detection group,organization HGF mRNA detection group and control group respectively. The expressions of plasma HGF and organization HGF were observed during the different periods of acute pulmonary embolism. Results:The expression of HGF was much higher in blood plasma HGF detection group than that of control group at different time points(P ＜ 0.01). The expression of HGF mRNA increased in organization HGF detection group compared with that of control group at 12 h after pulmonary embolism(P ＜ 0.01). Conclusion: The expression of HGF increased in acute pulmonary embolism, which can be used as a diagnosis indicator in acute pulmonary embolism.

Objective To evaluate the precision,accuracy,linear range and anti-interference performance of HbA1c assay by u-sing Primus Trinity Ultra2 automated analyzer.Methods According to Document EP published in 2004 by American Clinical and Laboratory Standards Institution(CLSI)and relative literatures,the precision,accuracy,linear range and anti-interference perform-ance were evaluated.Results The within-run and between-run CVs of HbA1c determination were both less than that announced by manufacture.In the tests of samples with certain concentrations,all the results were within the verification range respectively.In the linear verification,regression equation between the theoretical and measured values demonstrated that r2 >0.95,and a value was within the range of 0.97-1.03.For Primus Trinity Ultra2 the limit of interference effect didn′t exceed the allowable error at the medical decision concentrations.Conclusion The precision,accuracy,linear range and anti-interference was evaluated of the Primus Trinity Ultra2 automating HbA1c all could meet the manufacture′s declaim and the clinical needs.

Objective To investigate the mechanisms underlying intedeukin-22 (IL-22)-induced expression of heparin-binding epidermal growth factor-like growth factor (HB-EGF) in HaCaT cells.Methods Some HaCaT cells were divided into several inverention groups treated with IL-22 at concentrations of 12.5,25,50,100 μg/L,respectively and a control group treated with phosphate buffer saline (PBS).After 24-hour culture,total proteins were extracted from the HaCaT cells,and Western blot was performed to measure the expression of phosphorylated extracellular signalregulated kinase 1/2 (P-ERK1/2) in the mitogen-activated protein kinase (MAPK)-ERK1/2 pathway,as well as phosphorylated-JAK2 (P-JAK2) and phosphorylated-signal transducer and activator of transcription 3 (P-STAT3) in the JAK2/STAT3 pathway.In a blocking experiment,some HaCaT cells were divided into 4 groups to be treated with PBS,IL-22,PD98059 (an inhibitor of MAPK-ERK1/2) combined with IL-22 (PD98059 group),AG490 (an inhibitor of JAK2/STAT3) combined with IL-22 (AG490 group),respectively.After 24-hour treatment,total proteins and mRNAs were extracted from the HaCaT cells followed by Western blot and real-time quantitative reverse transcription-PCR for the measurement of protein and mRNA expressions of HB-EGF respectively.Statistical analysis was carried out with the software SPSS 16.0 by one-way analysis of variance (ANOVA) for intergroup comparisons and by Bonferroni's test for multiple comparisons.Results After treatment with IL-22 at the above 4 concentrations,the expressions of P-ERK1/2,P-JAK2 and P-STAT3 in HaCaT cells were all increased compared with the control group (all P ＜ 0.05).The protein and mRNA expression levels (expressed as the HB-EGF/β-actin ratio and 2-△△Cr respectively) of HB-EGF were both significantly decreased in the PD98059 group and AG490 group than in the IL-22 group (protein:0.183 ± 0.020 and 0.199 ± 0.011 vs.0.924 ± 0.032,F =37.700,36.400,respectively,both P ＜ 0.05; mRNA:1.034 ± 0.072 and 0.989 ± 0.038 vs.1.844 ± 0.135,F =11.271,13.429,respectively,both P ＜ 0.05).Conclusions IL-22 can activate the MAPK-ERK1/2 and JAK2/STAT3 signaling pathways in HaCaT cells,which may contribute to IL-22-induced expression of HB-EGF in HaCaT cells.

Objective To evaluate the effects of interleukin-22(IL-22)on the expression of tazarotene-induced gene 3(TIG3)in HaCaT cells. Methods Cultured HaCaT cells were randomly divided into several groups to be treated with different concentrations (12.5, 25, 50, 100 μg/L)of IL-22 alone, or the combination of 50 μg/L IL-22 with the MAPK-ERK1/2 inhibitor PD98059 or the JAK/STAT inhibitor AG490 for 24 hours. Those HaCaT cells treated with phosphate buffered saline served as the control group. Subsequently, total proteins and mRNAs were extracted from the HaCaT cells. An immunofluorescence assay, Western blot and enzyme-linked immunosorbent assay (ELISA) were performed to determine the protein expression level of TIG3, and real-time fluorescence-based quantitative PCR to quantify the mRNA expression of TIG3 in HaCaT cells. Results The immunofluorescence assay showed that TIG3 protein was mainly expressed in the cytoplasm of HaCaT cells. As Western blot revealed, the protein expression level of TIG3 was 0.743 ± 0.035, 0.678 ± 0.040, 0.582 ± 0.041 and 0.328 ± 0.032 in HaCaT cells treated with IL-22 of 12.5, 25, 50 and 100μg/L, respectively, significantly lower than that in the control group (0.839 ± 0.045, all P<0.05). ELISA also showed a decrease in the protein expression of TIG3 in IL-22-treated HaCaT cells, which was consistent with Western blot results. Further more, the mRNA expression level (2-△△Ct)of TIG3 was significantly weaker in HaCaT cells treated with IL-22 of 12.5, 25, 50 and 100μg/L than in the control group (0.838 ± 0.036, 0.686 ± 0.061, 0.565 ± 0.047 and 0.457 ± 0.033 vs. 1.000, all P< 0.05). The decrease in TIG3 mRNA and protein expressions was significantly attenuated in HaCaT cells treated with the combination of 50 μg/L IL-22 with PD98059 or AG490 compared with those treated with 50 μg/L IL-22 alone. Conclusion IL-22 can dose-dependently inhibit the expression of TIG3 in HaCaT cells, likely through the MAPK-ERK1/2 and JAK2/STAT3 signaling pathways.

Objective To investigate the interference of hyperlipidemia and hyperbilirubinaemia to HbA1c measurements by ion‐exchange high‐performance liquid chromatography(IE‐HPLC) method .Methods Fresh whole‐blood samples collected with EDTA‐K2 anticoagulant tubes were divided into four groups :control group(HbA1c<6 .2% ) ,diabetes group(HbA1c≥6 .2% ) ,hyperlipi‐demia group(TG 3 -20 mmol/L);hyperbilirubinaemis group (TBIL 21 -549 μmol/L) .HbA1c of these samples were measured with affinity chromatography(AC‐HPLC) and IE‐HPLC respectively .Results When HbA1c≤18 .7% ,r=0 .993 ;95% confidence interval(CI) of HbA1c results by using IE‐HPLC method was -0 .71 -0 .89 ;coefficient of variation was -5 .8% -6 .8% ;P=0 .198 and the difference was not statistically significant .When HbA1c< 16 .3% ,r= 0 .997;95% CI of HbA1c results with IE‐HPLC method is -0 .31-0 .67;coefficient of variation was -5 .8% -4 .3% .P=0 .000 and the difference was statistically signifi‐cant .No interference was detectded with the results ;When HbA1c was 16 .3% -18 .7% ,positive bias was observed with the re‐sults .When TG≤20 .78 mmol/L ,r=0 .995;95% CI of HbA1c results with IE‐HPLC method was -0 .26-0 .50 ;coefficient of var‐iation was -5 .5% -5 .8% .P=0 .000 and the difference was statistically significant .No interference was detectded with the re‐sults;When TBIL≤549 .3 μmol/L ,r=0 .990 ;95% CI of HbA1c results with IE‐HPLC method was -0 .08 -0 .63;coefficient of variation was -14% -4 .1% .P=0 .000 and the difference was statistically significant .When TBIL≤342 .1 μmol/L ,r= 0 .994 ;95% CI of HbA1c results with IE‐HPLC method was -0 .09-0 .50;coefficient of variation was -5 .5% -4 .1% .No interference was detectded with the results .When TBIL was 380 .7-549 .3 μmol/L ,negative bias was observed with the results .Conclusion Our data indicated that HbA1c measurement with IE‐HPLC method could resist the interference of hyperlipidemia;When TBIL≤380 .7 μmol/L and HbA1c<16 .3% ,the results could meet the needs of general clinical detection .Clinical staff should choose more specific HbA1c measurement method according to the patient's condition .

Objective To investigate the Influence of beta-thalassemia minor on four different HbA1c detection systems.Methods All 65 blood samples from March 2014 to August 2014 were collected from Zhongshan Hospital of Sun Yat-sen University , and divided to normal control group ( 40 cases ) , no diabetic group(20 cases) and diabetic group (5 cases) combining with beta-thalassemia minor.The fresh mixed whole-blood samples were used for transferring value-assignment in order to improve the comparability of Bio-Rad variant ⅡTurbo, Primus Ultra2 ,Roche Modular PPI to Bio-Rad Variant Ⅱwhich was NGSP Ⅰlaboratory certificated.The whole-blood concentration of HbA 1c were measured by four detection systems . Differences between normal control group and no diabetic group were compared using the Independent Samples T Test.Then Taking the Primus Ultra 2 as comparable system and others as experimental system ,the HbA1c results from no diabetic group and diabetic group were compared by the standardization NGSP Ⅰlaboratory and statistical techniques of consistency test .Results Compared with Variant Ⅱ detection system, after transferring value-assignment, deviations of Variant Ⅱ, Modular PPI and Variant Ⅱ Turbo were -6%to +6%.The HbA1c testing results from normal control group and no diabetic group had no statistical significance (P>0.05).Linear regression analysis demonstrated that the correlation coefficient of Primus Ultra2 with Variant Ⅱ, Modular PPI, VariantⅡTurbo were 0.995, 0.999 and 0.995, respectively (P<0.01).The percentage deviation of the reference system and experimental system was -6.0% to+6.0%.Conclusion There was no obviously significant influence of beta-thalassemia minor on Bio-Rad Variant Ⅱ,Bio-Rad variant ⅡTurbo,Primus Ultra2,Roche Modular PPI detection systems.