Objective: The activity of nitric oxide synthase(NOS)in nasal mucosa of normal guinea pigs was compared with that of allergic rhinitis(AR)guinea pigs to investigate the relationship between NOS and AR. Methods: Localization of NOS in nasal mucosa of normal and AR guinea pigs was examined by means of NADPH diaphorase (NADPH d) histochemical stain. Results: Nasal mucosa of both normal and AR groups was positive for NADPH d, though the AR group reacted more strongly. Reaction was localized to the cytoplasm of glandular cell, epithelium and vascular endothelium. Conclusion: There is distribution of NOS in nasal mucosa of normal guinea pigs. The activity of NOS in guinea pig AR model was significantly stronger than that in normal group. NOS is related to AR. [

Objective: To investigate the pathogenesis of allergic rhinitis at cell level by determing basophil histamine releasability in guinea pigs and attempt to find an objective way for the diagnosis of allergic rhinitis. Methods: A model of allergic rhinitis was established after healthy guinea pigs were randomly divided into 2 groups. The basophil histamine releasability to the stimulant of concanavalin A between normal and experimental guinea pigs was compared by means of fluorometric assay of histamine. Results: Basophil histamine release to various concentrations of concanavalin A in allergic rhinitis group was significantly enhanced as compared with that in normal control ( P

Objective To assess the patterns oflinkage disequilibrium (LD ) of16 STR loci on X chrom o-som e and investigate the genetic stability. Methods G enom ic DNA samples extracted from blood stains from 500 unrelated individuals and 885 lineage m em bers from E astern C hinese H an population were genotyped through m ultiplex am plification using ID typerX-16 kit by our independent research followed by capillary electrophoresis. LD was assessed by PowerM arker v3.25 software and m utation rate of every locus was analyzed. Results LD were not found at the 16 X-STR loci. A llele m utations were observed at 10 loci. A m ong them , m utation rates of DXS6809 and DXS7132 were both up to 0.004 8. Conclusion W hen the 16 X-ST R loci included in ID typerX-16 kit were used for parentage testing, product princi-ples can be applied to calculate the likelihood, but m utation should be taken into consideration in the case that the genotypes do not m eet the genetic law(especially at DXS6809 and DXS7132).

Objective To investigate the population genetic polymorphisms of 24 Y-STR loci in unrelat-ed individuals in Eastern Chinese Han population, and to compare the difference of Han group between Eastern China and Guangdong.Methods The population genetics of 24 Y-STR loci in 268 unrelated Han individuals from Eastern China were analyzed by GFS 24 Y-STR amplification kit. The allele fre-quencies in Eastern Chinese Han population were compared with the data in Guangdong Han population, and the difference analysis between two groups was performed.Results Among the 24 Y-STR loci of 268 unrelated Han individuals from Eastern China, 235 alleles and 267 haplotypes were observed. GD value ranged from 0.5649 to 0.9668. The difference between 12 loci(DYS622,DYS552,DYS443etal.) of Han population in Eastern China and in Guangdong was statistically significance.Conclusion GFS 24Y STR amplification system shows favorable polymorphisms, which can be used in patrilineal genetic relationship identification.

Objective: To investigate the influence of histamine content in nasal mucosa on blood flow. Methods: Sixty guinea pigs were randomly devided into control group and allergized group and guinea pigs were sacrificed before nasal challenge with allergen and immediately after nasal challenge, at 24, 48, 72 h. The content of histamine in nasal mucosa was examined. Nasal mucosa blood flow was examined in all guinea pigs before sacrifice. The data were analyzed using linear correlation and linear regression. Results: As compared with normal guinea pigs, the content of histamine and blood flow in nasal mucosa of allergic rhinitis guinea pigs were significantly increased before challengd with allergen( P

Objective T o analyse the genetic polym orphism s of 66 biallelic genetic m arkers on Y chro-m osom e in E astern C hinese H an population, and evaluate their values in forensic application. Methods G enotyping of 66 biallelic genetic m arkers on Y chrom osom e w as studied in 205 unrelated m ales of E astern C hinese H an population by m ultiplex PC R com bined m atrix-assisted laser desorption/ionization tim e-of-flight m ass spectrom etry (M A L D I-T O F-M S ). T he allele frequencies on the loci to be tested w ere calculated by direct counting m ethod, and the gene diversity (G D ) and haplotype diversity (H D ) w ere calculated by corresponding form ulas. T he haplotypes of this system w ere tested by softw are A rlequin v3.5.2.2 and the com parison of population genetics w ere analyzed. Results A total of 60 biallelic genetic m arkers on Y chrom osom e w ere polym orphic in m ales of E astern C hinese H an population, and the ranges of G D w ere from 0.0385 to 0.5019. E ighty-five different haplotypes w ere observed and the H D w as 0.9703. T he differences of partial SN P loci betw een the H an population of E astern C hina and that of X injiang and G uangdong w ere statistically significance. Conclusion Sixty biallelic genetic m arkers and the detection system can com plem entally provide genetic inform ation in kinship testing and individual identification. T he M A L D I-T O F-M S technology is able to type biallelic genetic m arkers.

Semisupervisedmakesfulluseoflargeamountsofunlabeledsamplestomakeuptheinsufficiency of labeled samples. Since it is difficult to obtain a large number of accurate labeled samples and it is a good way for modeling by using a small amount of labeled samples or a large number of inaccurate samples, we proposed a new method named as semi-supervised partial least squares ( SS-PLS) to optimize model based on semi supervised learning. We used 211 samples of tobacco near infrared spectrum and sensory evaluation for modeling and used SS-PLS method to optimize tobacco sensory evaluation model. In the optimized model, the coefficient of determination ( R2 ) can reach up to 90%, the ratio of performance to deviation ( RPD) can reach up to 3 . 0 , and the standard error of cross validation and the standard error of prediction ( SECV and SEP) are below 1. 0. We divided the original sensory evaluation and SS-PLS optimized data into three grades of excellent, medium and poor in accordance with the fixed threshold, the result using projection model of based on principal component and Fisher criterion ( PPF ) shows that the classification of SS-PLS optimized data is better than the original sensory evaluation data. The SS-PLS method can solve the data representation problem of using small sample set for modeling and provides a new chemometrics method for near infrared spectroscopy modeling in case of obtaining a large number of accurately labeled samples is difficult.

Humans ; Siblings ; Gene Frequency ; Microsatellite Repeats

As a rapid, accurate and high throughput bacterial identification technique, matrix-assisted laser desorption ionization time of flight mass spectrometry(MALDI-TOF MS)has been gradually applied to clinical microbiological laboratories.However, the application of MALDI-TOF MS is far beyond the identification of bacteria.It also has broad application prospect in bacterial typing.The MALDI-TOF MS based typing method is simple, rapid, low-cost and high throughput, which can play an important role in nosocomial infections surveillance.