Objective To examine the effects of a functional polymorphism of the monoamine oxidase A (MAOA) gene on spontaneous brain activity in healthy male adolescents.Methods Resting-state fMRI was performed on 31 healthy male adolescents with the low-activity MAOA genotype (MAOA-L) and 25 healthy male adolescents with the high-activity MAOA genotype (MAOA-H).The amplitude of low-frequency fluctuation (ALFF) of the blood oxygen level-dependent (BOLD) signal was calculated using REST software,and was compared between two genotype groups.The region ROIs showed significant difference.The ALFF data in ROIs were related to BIS scores.Results Compared with the MAOA-H group,the MAOA-L group showed a significant decrease of ALFF (P＜0.001) in the pons (MNI coordinates:-6,-19,-23;6,-16,-17;-6,-25,-32).In addition,the BIS scores were positively correlated with ALFF in pons in the MAOA-L group (r=0.398,P=0.02),but not in the MAOA-H group.Conclusions There exists relevance between the polymorphism of MAOA and the spontaneous brain activity in pons.And the lower activity of spontaneous brain activity in pons may be a key risk factor for impulsivity and aggression.

This paper was aimed to study the genetic diversity and genetic relationship of germplasm resource of Lonicerae Japonicae Flos in order to provide references for its breeding. A total of 36 samples from 18 farm varieties and wild species, as well as related species of Lonicera japonica Thunb. from the main production areas were studied by ISSR-PCR markers. The Jaccard coefficient was worked out by NTSYS-pc software. And a cluster dendrogram of different samples was established based on unweighted pair-group method with arithmetic mean (UPGMA). The re-sults showed that 12 ISSR primers generated 129 loci of which 114 loci were polymorphic. The average percentage of polymorphic bands (PPB) is 88.37%. In the cluster dendrogram, different samples of Lonicera japonica are in the same group, which showed that it is a natural species; the wild sample is separated from the cultivated samples; the traditional type-Maohua is relative stable, but the type of Jizhuahua includes complicated varieties, and it has obvi-ous genetic variation; the new variety Jiufeng 1 has already distinct into one stable type. It was concluded that the ISSR method was suitable for germplasm identification, genetic diversity analysis of Lonicerae Japonicae Flos, thus providing a theoretical foundation for its cultivation and breeding.

Objective To evaluate the application effect of‘incorrect cases’in medical statis-tics teaching. Methods The junior students (n=307)of clinical medicine were selected as research subjects by random cluster sampling. They were divided into the teaching improving group (n=151) who accepted case teaching and control group (n=156)who accepted traditional teaching. At the end of the term,the teaching effect was surveyed by questionnaires and compared between the two groups. Measurement data was analyzed by t test,enumeration data by χ2 test and ranked data by rank sum test. Results Students' interests of medical statistics and understanding the importance of the course in teaching improving group were significantly higher than that in control group (Z=-2.375,P=0.018;Z=-2.971,P=0.003). The proportion of students with learning difficulties in teaching improving group was obviously lower than that in control group (Z=-2.488,P=0.013). The satisfaction with theory and practical teaching in teaching improving group (84.10% and 88.74%,respectively)was significantly higher that in control group (73.08%and 71.79%,respectively)(χ2=5.530,P=0.013;χ2=13.841,P<0.001). Although no difference was observed in the test score between the two groups (t=1.230,P=0.220),knowledge of parameter estimation,hypothesis testing and science research design in teach-ing improving group was significantly higher than that in control group (χ2=6.829,P=0.009;χ2=5.835, P=0.016). Conclusions Application of ‘incorrect cases’in medical statistics teaching could arouse students' learning interests and improve clinical medical students' comprehensive analy sis ability of medical statistics.

Objective:To explore the grey matter concentration in individuals with cognitive vulnerability to depression.Methods:Thirty individuals with cognitive vulnerability to depression and thirty age-and gender-matched healthy controls were enrolled in this study,and they were subjected to magnetic resonance imaging (MRI) examination.The grey matter concentration differences were compared between the two groups by using voxel-based morphometry (VBM) following MRI.Results:Individuals with cognitive vulnerability to depression showed significantly lower grey matter density in bilateral insular,left cerebellum,right supplementary motor area,and left precentral gyrus than those in the healthy controls,while the healthy controls showed significantly lower grey density in the right inferior frontal gyrus,right middle frontal gyrus,and left cuneus than those in the individuals with cognitive vulnerability to depression.Conclusion:Structural brain abnormalities in individuals with cognitive vulnerability to depression might be the neural basis for cognitive vulnerability to depression.

Objective To investigate the association of human leukocytes antigen(HLA)-DR/DQ with oral lichen planus(OLP) in the area of Yangtze River Delta. Methods HLA-DRB1 and DQB1 genotyping of 44 unrelated OLP patients and 150 normal controls were performed by polymerase chain reaction-sequence specific primers(PCR-SSP) method.The data were compared between the OLP group and normal controls,and between different types of OLP patients. Results The frequency of HLA-DRB1*09 and HLA-DRB1*07 alleles were significantly higher in OLP group than those in normal controls(56.8% vs 31.3% and 27.3% vs 13.3%,P

Objective Using the third high sensitive cardiac troponin I assay to establish the reference intervals of serum cardiac marker high sensitivity cardiac troponin I ( hs-cTnI ) in apparently healthy subjects of Beijing area, and to explore the relationship between cTnI and other parameters.Methods Using random selection method, a total of 440 serum samples were collected from apparently healthy subjects of Beijing area.Among them, 217 cases were male, average age was (50.0 ±14.3) years old;223 cases were female, average age was ( 49.0 ±14.0 ) years old.All of these serum samples were detected hs-cTnI using i2000 Abott biochemical analyzer and ARCHITECT STAT Abbott assay kit.And the 99th percentile upper reference limit was used as the reference interval.Non-parametric tests were used to compare the different groups, the U Mann-Whitney test was used between two groups, the Kruskal-Wallis test was used in many groups, and the correlation analysis was used Spearman method.Results The 99th percentiles of hs-cTnI in 440 apparently healthy subjects is 9.66 ng/L.While the male group is 9.66 ng/L, and the female group is 8.25 ng/L.The serum hs-cTnI level of male is higher than female ( 9.95 ng/L vs 8.25 ng/L, P<0.05 ).According to the spearman correlation analysis, the serum hs-cTnI level appears positive correlation with age, brain natriuretic peptide (BNP), alanine aminotransferase (ALT),aspartate transaminase ( AST) ,gamma-glutamyl transferase ( GGT) ,total bilirubin ( TBIL) ,serum creatinine ( SCR) , hemoglobin (HGB)(P<0.05,R>0),and appears negative correlation with platelet (PLT)(P<0.05,R<0).Conclusion The serum hs-cTnI level apparently differents with gender, so it is necessary to establish reference intervals among different gender group of Beijing area.

Abstract: Objective To understand the prevalence and influencing factors of major chronic diseases among Kirgiz residents in Aheqi County, Xinjiang, and to provide theoretical basis for the prevention and control of chronic diseases in this area. Methods　The data of residents in Aheqi County, Kizilsu Kirgiz Autonomous Prefecture, Xinjiang in 2020 for health checkup were selected, and the permanent residents of Kirgiz nationality aged ≥18 were selected as the survey objects, and the prevalence of major chronic diseases and their influencing factors were analyzed by Logistic regression model. Results　A total of 21 935 patients were enrolled, and 10 602 patients suffered from chronic diseases with a prevalence rate of 48.33%, including 4 929 cases of hypertension with a prevalence rate of 22.47%, 4 238 cases of obesity with a prevalence rate of 19.32%, 3 610 cases of dyslipidemia with a prevalence rate of 16.46%, 1 632 cases of anemia with a prevalence of 7.44%, and 1 236 cases of type 2 diabetes with a prevalence of 5.63%. The prevalence of hypertension, obesity, dyslipidemia and type 2 diabetes increased with age, while the prevalence of anemia decreased with age (P<0.01). The prevalence of hypertension dyslipidemia and type 2 diabetes was higher in males than in females, and the prevalence of obesity and anemia was higher in females than in males, with statistical significance (P<0.01). Logistic regression analysis showed that 30-<40 years old (OR=1.836, 95%CI: 1.565-2.034), 40-<50 years old (OR=2.916, 95%CI: 2.613-3.255), 50-<60 years old (OR=5.244, 95%CI: 4.651-5.913), 60 years old and above (OR=10.866, 95%CI: 9.533-12.385), government personnel (OR=1.789, 95%CI: 1.405~2.279), professional and technical personnel (OR=1.774, 95%CI:1.372-2.295), the office staff (OR=1.923, 95%CI: 1.418-2.607) occasional alcohol consumption (OR=1.157, 95%CI: 1.055-1.270) and occasional exercise (OR=1.498, 95%CI: 1.238-1.812) were risk factors for chronic disease. Conclusion　The prevalence of chronic diseases among residents in Aheqi County of Xinjiang is at a low level. Local health institutions have strengthened health education and publicity on multiple chronic diseases and the prevention and control of anemia among young and middle-aged women.

Objective To evaluate the application value of time-intensity curve analysis of contrastenhanced ultrasonography (CEUS) in differential diagnosis of malignant and benign breast masses.Methods From January 2015 to September 2015,30 patients with one lesion confirmed by surgical pathology were examined by CEUS.Then time-intensity curve analysis was performed.Results 16 lesions were found in the benign group and 14 lesions were in the malignant group.Five parameters of benign and malignant group were statistically analyzed,including Perfusion slope rate (C),intensity of peak (A),Subsidence slope rate (K),time of peak value (T) and area under the curve (Area).The perfusion slope rate (C) of benign and malignant group is [(0.24 ± 0.41) vs (0.67 ± 0.39)].There was no statistical difference between the two groups in intensity of peak (A),Subsidence slope rate (K),time of peak value (T) and area under the curve (Area),except perfusion slope rate (P＜0.05).Conclusion Time-intensity curve analysis of CEUS has certain effect on differential diagnosis of malignant and benign breast masses.

Fifty-eight samples belonging to 7 species of Arisaematis Rhizoma and its adulterants were collected. The ITS2 locus was employed as a DNA barcode and amplified, sequenced and assembled for all of the collected samples. Then, ITS2 sequences have been annotated using HMM-based method. The intra- and inter-specific variations were calculated and NJ tree was constructed using MEGA 6.0 software. The results showed that inter-specific K2P distances were significantly larger than intra-specific distances for all of the three origin species of Arisaematis Rhizoma. Furthermore, three origin species, Arisaema amurense, A. erubescens and A. heterophyllum, can be respectively formed to be a single branch with high bootstrap values. It is concluded that ITS2 can be used to correctly identify Arisaematis Rhizoma from its adulterants and the application of ITS2 in the identification of traditional Chinese medicine has an important prospective.
Arisaema ; classification ; genetics ; DNA Barcoding, Taxonomic ; methods ; DNA, Plant ; genetics ; DNA, Ribosomal Spacer ; genetics ; Drug Contamination ; prevention & control ; Drugs, Chinese Herbal ; chemistry ; classification ; Molecular Sequence Data ; Phylogeny ; Quality Control ; Rhizome ; classification ; genetics