Objective To investigate the association between the single nucleotide polymorphism (SNP) of leukotriene C4 synthase(LTC4S) rs730012 in the childhood asthma.Methods Sequence specific primers-polymerase chain reaction was used to assess the genetic polymorphism of LTC4S rs730012 in 105 asthma children with different order of severity and 128 non-asthma children in our hospital in the northeast of China to analyse the association between the SNP of LTC4S rs730012 and susceptibility,clinical phenotype in asthma children.Results (1) In case group,genotype frequencies of A/C,A/A and C/C were 71.4％ 、25.7％ 、2.9％,allele frequencies for A,C were 84.3％,15.7％.In control group,the genotype frequencies of A/A,A/C,C/C,were 70.3％,28.9％,0.8％,allele frequencies for A,C were 84.8％,15.2％.No significant difference was found in AA genotype and C allele frequencies between case and control grouP(x2 =0.035、0.020,P both ＞0.05).(2) C/C genotype or C allele frequencies in moderate-severe asthma group were significantly higher than the mild asthma group(x2 =5.859、5.641,P both ＜ 0.05);(3) SaO2 of A/A group was significantly higher than A/C and C/C group (t =2.976,Pboth ＜ 0.05),and FeNO and obstructive ventilatory disorder incidence rate in A/C,C/C group were higher than A/A group,the differences were statistically significant (t =2.946、x2 =5.564,P both ＜ 0.05).Conclusion The SNP of LTC4S rs730012 is associated with the order of severity,SaO2,FeNO,pulmonary function in asthma children of northeast China.However,the rs730012 is not associated with the susceptibility for asthma.

Diagnosis, Differential ; Female ; Humans ; Knee Joint ; pathology ; Middle Aged ; Sarcoma, Synovial ; pathology ; Tomography, X-Ray Computed

Objective To investigate potential problems and solutions within the data of national surveillance of Keshan disease(KSD), to improve the quality of surveillance data and the reliability of the results. Methods Four key variables (name, sex, age, and KSD diagnosis) in the national surveillance data of KSD in 2009 were cleaned by SPSS 15.0. Cleaning contents included duplicate records, missing values, outliers and logic errors. Name, sex, age, currently residing in townships and currently residing in villages and other variables were combined into different filters to find duplicate records by the command of Identify Duplicate Cases , then the duplicate records were returned to the data reporting agencies, and finally delete or merge. Data with missing values, outliers, or logical errors were found by commands of Frequencies, Descriptives and Select if, then the duplicate records were returned to the data reporting agencies. Data were revised based on not only the feedback , but also by using the relationship between variables, and by consulting KSD clinical experts. Results Four hundred and sixty-four cases of duplicate records were found and cleaned. The number of missing values was 2 047 (specifically, name 0, sex 3, age 32 and KSD diagnosis 2 012). The number of outliers was 1 988 (specifically, name 6, sex 3, age 10 and KSD diagnosis 1 969). The records of 5 kinds of logic errors of KSD diagnosis were 105 in all. Conclusion There are duplicate records, missing values, outliers and logic errors in the national surveillance data of KSD, cleaning work could improve the quality of surveillance data, ensure the authenticity and rliability of the monitoring data.

The carbamyl phosphate synthetase I (CPS,) cDNA probe labelled with alpha ~(35)S-dATP was obtained by using modified nick translation technigue. The specific radioactivity of the obtained probe reached 0.9-1.5?10~8cpm/ug DNA. This probe could be satisfactorily used in RNA-DNA in situ hybrioization for detecting the gene expression of CPS_1 in liver tissue sections. The advantages of using ~(35)S instead of ~(32)P and ~3H for labelling DNA probe were discussed.