OBJECTIVE: To investigate the polymorphism of the TPH gene T3792A locus in Han ethnic group of north China and its application value in forensic science. METHODS: The polymorphism of T3792A locus of the TPH gene was analyzed by the ASPCR of blood samples from 173 unrelated individuals of north Chinese Han population. RESULTS: The distribution of the T3792A locus polymorphism of the TPH gene in Han ethnic group of north China followed the Hardy-Weinberg law, with the allele A and T gene frequency of 0.486 and 0.514, respectively. CONCLUSION The TPH gene T3792A locus shows a very good genetic polymorphism, and may be applied to individual identification and paternity testing.
Asian People/genetics* ; China/ethnology* ; Forensic Genetics ; Gene Frequency ; Humans ; Paternity ; Polymorphism, Genetic ; Tryptophan Hydroxylase/genetics*

OBJECT: To study sequence polymorphism of mtDNA control region in Chinese Qinghai Tibetan group and Han population. METHODS: Venous blood samples from 69 unrelated Qinghai Tibetans and Han individuals were collected and their mtDNA control region sequences were analyzed. Polymorphism indicators were calculated. The genetic distances based on Fst and Rst among eleven groups from different districts include the Qinghai Tibetan and Han population were elucidated using Nei's method. Phylogenetic tree was constructed. RESULTS: There were 56 polymorphic loci and 59 loci found in the mtDNA control region of Tibetan group and Han population, respectively. It was indicated by the Rst distance that there was a far distance between Qinghai Tibetan and the other populations (P<0.05), and the distance was much closer between Qinghai Han and Xi'an Han, Mongolian, Changsha Han populations (P>0.05). CONCLUSION There is unique genetic polymorphism of mtDNA control region both in Qinghai Tibetan and Han population. These findings may be useful in forensic identification, population genetic and migration studies.
Asian People/genetics* ; China/ethnology* ; DNA, Mitochondrial/genetics* ; Forensic Genetics ; Humans ; Phylogeny ; Polymorphism, Genetic ; Sequence Analysis, DNA ; Tibet

Objective: To analyze the epidemiological characteristics of waist circumference and abdominal obesity among Chinese children and adolescents aged 6-17 years. Methods: Data was from the samples of aged 6-17 years in the China National Nutrition and Health Surveillance program in 2010-2012. P(90) (the same age, the same sex) was used as the diagnostic value for abdominal obesity. Results: The overall waist circumference of children and adolescents in all the age groups appeared higher in males than that in females (P<0.000 1), higher in cities than that in the rural areas (P<0.05), and higher in children with high family income than those with middle or low family incomes (P=0.000 3). The rate of abdominal obesity in children and adolescents aged 6-17 years appeared as 11.2% on average and 10.7% and 11.8% for boys and girls, respectively but with no significant difference (P>0.05). Rates on abdominal obesity appeared as 13.2% and 8.5% for boys while as 12.3% and 11.2% for girls respectively, in urban or rural areas. As for the levels of family income, the abdominal obesity rates appeared as 15.8%, 11.5% and 8.8% respectively for boys while 13.5%, 11.9% and 11.6% respectively for girls, under high, middle and low levels of family income. Conclusion: The rate of abdominal obesity in boys seemed more responsive to the impact of income in urban or rural areas.
Adolescent ; Asian People/statistics & numerical data* ; Child ; China/epidemiology* ; Cities ; Female ; Humans ; Male ; Obesity, Abdominal/ethnology* ; Prevalence ; Waist Circumference

Objective: To evaluate the association of family history with risk of major coronary events (MCE) and ischemic heart disease (IHD). Methods: After excluding participants with heart disease, stroke or cancer at baseline survey, a total of 485 784 participants from the China Kadoorie Biobank, who had no missing data on critical variables, were included in the analysis. Cox regression analysis was used to estimate the hazard ratios (HR) and 95% CI. Subgroup analyses were performed according to the baseline characteristics. Results: During a median of 7.2 years of follow-up, we documented 3 934 incident cases of MCE and 24 537 cases of IHD. In multivariable-adjusted models, family history was significantly associated with risk of MCE and IHD. The adjusted HRs (95%CI) were 1.41 (1.19-1.65) and 1.25 (1.18-1.33), respectively. History of disease among siblings was more strongly associated with early-onset MCE than parental history (HR=2.97, 95%CI: 1.80-4.88). Moreover, the association of family history with MCE and IHD was stronger in persons who were overweight or obesive, and the association between family history and MEC was stronger in smokers. Conclusion: This large-scale, prospective study indicated that family history was an independent risk factor for MCE and IHD in China. The intervention targeting major known lifestyle risk factors and the management of chronic diseases should be strengthened for Chinese population, especially for the individuals with family history were at high risk.
Asian People/statistics & numerical data* ; China/epidemiology* ; Coronary Disease/genetics* ; Humans ; Incidence ; Myocardial Ischemia/genetics* ; Overweight/ethnology* ; Proportional Hazards Models ; Prospective Studies ; Risk Assessment ; Risk Factors ; Smoking/ethnology*

Objective: To explore the relations between the prevalence of multiple chronic diseases and cigarette smoking behavior in the Chinese adults. Methods: Based on the results: from the 2013 Chronic Disease Risk Factor Surveillance (NCD Surveillance), 176 534 Chinese residents aged 18 years and above, covering 298 counties (districts) in 31 provinces, was randomly recruited, using the multi-stage stratified clustering sampling method. Information on demographics, cigarette smoking (status, quantity and period) was obtained through face-to-face interviews and questionnaires. Anthropometric data and blood samples were collected and properly stored for analysis. Results In total, 175 386 adults were included for statistical analyses, with 42.7% as males and 57.3% as females. The prevalence rates of hypertension, high total cholesterol and high triglycerides were 30.4%, 7.2% and 18.0% in male smokers, 35.6%, 14.0%, 10.3% and 15.9% in female smokers respectively, which were all higher than those in the respective non-smokers. Male smokers were found under lower risk on hypertension, but 19% higher on total glycerides when compared with non-smokers of the same sex(OR=1.19, 95%CI:1.10-1.30), when multiple risk factors were under control. Male current smokers with more than 20 cigarettes per day have 41% (OR=1.41, 95%CI: 1.28-1.55) higher risk of high TG than non-smokers. Female smokers presented 40% (OR=1.40, 95%CI: 1.15-1.70) higher risk in high glycerides than the non-smokers. Specifically, women smoking longer than 20 years have 60% (OR=1.60, 95%CI: 1.31-1.95) higher risk of high TG than women smoking less than 20 years. Conclusions: Prevalence rates of certain chronic diseases were seen higher in smokers of both genders. People with longer history of smoking or being heavier smokers, appeared at advanced risk on developing chronic diseases.
Adult ; Aged ; Asian People ; Chronic Disease/ethnology* ; Cigarette Smoking/ethnology* ; Female ; Humans ; Hypertension/epidemiology* ; Male ; Prevalence ; Risk Factors ; Sex Distribution ; Sex Factors ; Smoking Cessation ; Surveys and Questionnaires

Objective: To analyze the prevalence rates of overweight and obesity in Chinese children and adolescents aged 6-17 years, and to provide scientific basis for the development of prevention strategies on obesity. Methods: Data was from children and adolescents aged 6-17 years in the China National Nutrition and Health Surveillance 2010-2012 program. In children aged 6 years, criteria of overweight and obesity were followed the WHO growth reference for school-aged children and adolescents. In children and adolescents aged 7-17 years, overweight and obesity were defined by sex and age specific BMI, recommended by Guidelines for prevention and control of overweight and obesity among school-age children and adolescents according to the Chinese guidelines. Results: The overall rates on overweight and obesity were 9.6% and 6.4% among the Chinese children and adolescents aged 6-17 years, with 11.0% (12.8% for boys and 9.0% for girls) in urban and 7.7% (boys 9.7%, girls 5.5%) in rural areas. The rates of overweight and obesity among children and adolescents were 8.4% (boys 9.3%, girls 7.4%) and 5.2% (boys 6.2%, girls 4.1%) in the rural areas. According to the levels of household income, the overweight rates of children in high, middle and low incomes were 12.3%, 10.7% and 8.2%, with obesity as 8.6%, 7.2% and 5.7% respectively. Conclusions: In 2012, the prevalence rates of overweight and obese were 9.6% and 6.4% among children and adolescents aged 6-17 years, respectively, higher in urban than in rural areas and higher boys than in girls. The prevalence rates of overweight and obesity seemed to be related to the levels of household income.
Adolescent ; Asian People/statistics & numerical data* ; Body Mass Index ; Child ; China/epidemiology* ; Female ; Health Promotion ; Humans ; Male ; Nutritional Status ; Obesity/ethnology* ; Overweight/ethnology* ; Prevalence

OBJECTIVE: The genetic polymorphism of 8 STR loci, was studied in northern Chinese Han and Uygur populations. METHODS: The 8STR loci(vWA,TH01, TP0X, CSF1P0, D5S818, D13S317, D7S820, D16S539) were analyzed and genotyped by fluorescent prime labeling kit and gene scan technology. RESULTS: 62 alleles were found in 100 individuals of Han population, CPE value was 0.9975; And 52 alleles were found in 50 individuals of Uygue population, CPE value was 0.9973. The TDP of both was beyond 0.9999. The difference of gene frequency between the two populations was significant. CONCLUSION The genetic polymorphism of the 8 STR loci in the Han and Uygue populations is high, there are ethic differences in frequency distribution.
Alleles ; Asian People/genetics* ; China/ethnology* ; Chromosome Mapping ; Female ; Forensic Medicine ; Gene Frequency ; Genetic Markers/genetics* ; Genetics, Population ; Humans ; Male ; Microsatellite Repeats ; Polymorphism, Genetic

OBJECTIVE: To investigate the genetic polymorphisms of 15 STRs loci in Chinese E Wen-ke population. METHODS: DNA samples from 99 unrelated individuals in Chinese E Wen-ke population were screened by Power Plex 16 System and ABI3100 Genetic Analyzer. RESULTS: The genotype frequencies of these 15 STR loci meet the Hardy-Weinberg expectation. The Matching probability of 15 STRs loci were between 0.0205-0.1733, discriminating power (DP) at 0.8267-0.9795, heterozygosity (Ho) at 0.6061-0.9091, power of exclusion (PE) at 0.4038-0.7690, polymorphism information content (PIC) at 0.5985-0.8734. The total DP of 15 STRs loci is 0.9999999999998. CONCLUSION Our results showed that the 15 STRs loci of Power Plex 16 System are valuable STR loci genetic marker system having high DP and are useful in forensic case work in Chinese E Wen-ke population.
Alleles ; Asian People/genetics* ; China/ethnology* ; DNA/isolation & purification* ; Forensic Medicine ; Gene Frequency ; Genotype ; Humans ; Polymerase Chain Reaction/methods* ; Polymorphism, Genetic ; Tandem Repeat Sequences

OBJECTIVE: To determine the HLA-Cw allele and genotype frequencies from Xi'an Han population and obtain genetic data. METHODS: The results of HLA-Cw typing for 130 randomly selected from Xi'an Han population were obtained by using the PCR-Sequence Specific Oligonucleotide Probes (SSOP). RESULTS: In this investigation, 16 alleles were detected among 130 unrelated individuals with frequencies from 0.0077 to 0.1588 and HLA-Cw*01,03,07 were the most common HLA-Cw alleles. We have made a survey of HLA-Cw alleles frequencies in Xi'an Han Population, with blank frequency being lowered to 0.018 2. CONCLUSION The distribution of genotype frequencies met the law of Hardy-Weinberg equilibrium by Hi-square test. The frequency data can be used in forensic and paternity tests, transplant matching and anthropology.
Alleles ; Asian People/genetics* ; China/ethnology* ; Gene Frequency ; Genotype ; HLA-C Antigens/genetics* ; Humans ; Oligonucleotide Probes ; Polymerase Chain Reaction/methods* ; Polymorphism, Genetic

OBJECTIVE: To study the sequences of off-ladder alleles of PowerPlex 16 kit in Chinese Han population and their nomenclature. METHODS: 10071 Samples from unrelated individuals in Chinese Han population were screened by using PowerPlex 16 kit and ABI 377 or 3100. The samples showing off-ladder alleles were re-screened with PAGE and the off-ladder alleles were obtained and sequenced. RESULTS: 32 off-ladder alleles were found in 11 STR loci, whose frequencies ranged from 0.05 per thousand to 4.02 per thousand. These alleles were classified as four types: (1) having complete repeat but its length is out of the ladder; (2)having incomplete repeat; (3) having deletion or insertion of one or two base(s) in flanking sequence; (4) having deletion of some segment. CONCLUSION Off-ladder alleles have various types. It demonstrates varying repteating number of the core unit, and variation in the flanking sequence or core sequence as well. The nomenclature of International Society for Forensic Haemogenetics cannot define these alleles effectively.
Alleles ; Asian People/genetics* ; Base Sequence ; China/ethnology* ; DNA/analysis* ; Female ; Gene Frequency ; Genetics, Population ; Genotype ; Humans ; Male ; Sequence Analysis, DNA ; Tandem Repeat Sequences/genetics*