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Objective To identify the association of oxygen saturation of arterial hemoglobin (SaO2) with late-onset hypertension in the Chinese Han population located in the Daxinganling area.Methods A total participants were selected by convenience sampling methods from the Daxinganling area.All data were collected from each person by the questionnaire record of physical examinations as well as biochemical index measuring.SaO2 was noninvasively measured with finger pulse oxymetry,the reported SaO2 was the average of three readings taken 10 seconds apart.Results There were significant differences for SaO2 within the population of individuals,the mean SaO2 values was 97.71%±6.14%,with range from 88% to 100%.There was association of SaO2 with sex,BMI and age.SaO2 level declined with BMI and age increasing.Particularly,it was found that the risk increasing to hypertension was marked association with SaO2 rapid drop.During the period from 40-50 years of age,SaO2 declined from 97.85% to 97.64%,The risk to hypertension increased more than 10 times(P<0.001).That implicated hypoxia mightinvolve in the etiology of hypertension.Conclusions The preliminary results demonstrated the rapid decline of SaO2 with lapse of age may be one of the major risk factors to hypertension,it may be helpful to explain late-onset hypertension to some extent at least.
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Objective To investigate the physiological characteristics and the association with low prevalence of metabolic syndrome in Keriyans,a nomadic tribe,in the Taklimakan Desert.Methods An epidemiological survey focusing on diet and standardized physical examinations were made in a randomly selected natural population of 508 Keriyans individuals residing in the Taklimakan desert.In addition,237 of Uyghur subjects from Yutian county were enrolled as controls.Results Between these two populations,statistical significances were observed in body mass index (BMI) [(21.25 ± 3.10 vs 22.66 ± 4.18) kg/m2,P＜0.05],blood pressure (P＜0.01),triglyceride [TG,(0.98 ± 0.77 vs 1.50 ± 1.29) mmol/L,P＜0.01],total cholesterol [TC,(2.23 ± 1.02 vs 3.26 ± 0.85) mmol/L,P＜0.01],low density lipoprotein-cholesterol[LDL-C,(1.41 ± 0.68) mmol/L,P＜0.01],fasting blood glucose [(4.43 ± 1.19 vs 5.56 ± 1.39) mmol/L,P＜0.01],fat and salt intake (P＜0.05).The Keriyans had a low incidence of hypertension(9.94％ vs 29.11％,P＜0.01),raised blood cholesterol and diabetes mellitus(2.2％ vs 11.91％,P＜0.01) compared with the control group.The prevalence of metabolic syndrome was 0.6％ (3/500) in Keriyans and 13.62％ (32/235) in the control group.The prevalence of metabolic syndrome in Keriyans was much lower than that in the control group (P＜0.01).The caloric intake in keriyans group was lower tha than in the control group [(1 502.341 vs 2106.870) kcal,P ＜ 0.01].Conclusions The preliminary results showed that the physiological characteristics with low BMI,blood glucose,and the low levels of TG,TC,LDL-C,as well as they were inured to low salt loading,little smoking and no alcohol drinking,and natural living environment free from pollution,these factors might be associated with the low prevalence of metabolic syndrome in Keriyans.And their low calorie intake might be the most important factor of their low prevalence of metabolic syndrome.
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Objective To investigate the physiological characteristics and the association with low prevalence of hypertension in "desert people" ,as an isolated population,in Taklimakan Desert.Methods All data were obtained from each person by questionnaire and standardized physical examinations. Total 469 subjects received examinations,including 359 subjects of "desert people" (M/F=205/154),aged from 15~99 years; 101 subjects of Uyghur from Yutian county (M/F=51/50),aged from 20~85 years,as controls. Some parameters :TC,TG,LDL-C,HDL-C,Apo-A,Apo-B,Lp-a,BUN,UA and CRE were determined. The statistical analysis was performed with SAS9.1.3 Version (Inititute Inc. Cary,NC. USA). Continuos values were expressed as mean?SD.Differences between groups were examined by student's t test,and statistical difference was considered when the P value was less than 0.05.Results 1)The height in "desert people" was significantly taller than that in controls.P value was 0.0317 for male and P60 years,P value was 0.0127 and 0.0443,respectively.(3)The prevalence of hypertension in "desert people" was 7%(24/359),that was significantly lower than that in controls(30.7%,31/101),P
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Objective To investigate the correlation between ACE gene polymorphisms and stroke of Han nationality people in Fangshan district of Beijing. Methods The Insertion/Deletion(ID) polymorphisms of ACE gene were detected in 63 patients with cerebral hemorrhage,and 713 patients with cerebral infarction and 235 health control by polymerase chain reaction(PCR). We observed the frequencies of genotype of deletion homozygote(DD),insertion homozygote(II) and insertion/deletion heterozygote (ID) and the alleles of D and I. Also we analyzed the association among I/D polymorphisms of ACE gene with serum glucose(GLU),triglyceride(TG),cholesterol(TC) levels. Results There was no significant difference in the frequencies of both genotypes of DD,ID,II and alleles of D and I in three groups. The serum GLU levels in patients carrying ID,II genotype were higher than those in healthy control(P
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30%) might be a risk factor in HAPE susceptibility.
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Objective Sequence variations in mitochondrial DNA genes have been found to influence successful aging and longevity. The aim of this study was to examine whether mitochondrial DNA polymorphisms influenced the longevity in Chinese Uygur population.Methods We genotyped the mt5178A and mt10398G in 277 sampels representing three age group (centenarian, n=65; longevity, n=100; controls, n=112) from Taklimakan desert Uygur centenarians,China Results The distribution frequency of the 5178A in the centenarian (51/65, 78.5%) is slightly higher than in those of controls (63/112,56.3%,P=0.0029) . The frequency of the 10398G were significantly higher among the centenarian(47/65,72.3%)and longevity(68/100,68%) in comparison to the controls(60/112,53.6%,P
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Objective To investigate the relation ship between two polymorphisms within the CETP gene,TaqIB and I4O5V,and natural longevity in the Uygur population.Methods 191 healthy individuals over 90 years old and 53 control individuals who died before their 75 years were recruited.The polymorphisms within CETP gene,TaqIB and I4O5V,were genotyped by PCR-RFLP and PCR-Sequencing.Results There were no difference in the genotypes and alleles distribution of two polymorphisms within the CETP gene between longevity group and control group.Conclusions There was no correlation between the polymorphisms within CETP gene,TaqIB and I4O5V,and natural longevity of Uygur population in Hetian.
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Objective To investigate the relationship between polymorphisms within the CETP gene, D442G,and natural longevity in the Uygur population. Methods 191 healthy individuals over 90 years old and 53 control individuals who died before their 75 years were recruited. The D442G polymorphism within CETP gene was genotyped by PCR-RFLP and PCR-Sequencing. Results There were no difference in the genotypes and alleles distribution of D442G polymorphisms within the CETP gene between longevity group and control group. Conclusions There were no the correlation between the D442G polymorphisms within CETP gene and natural longevity of Uygur population in Hetian. The difference of D442G polymorphism existed in not only races, but also regions where the same race dwelled.
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Objective To figure the clinical characteristics and genetic bases of Dentinogenesis imperfecta type Ⅱ in a large Mongolian family.Methods Systematic analysis for this family was carried out using clinical detection. Results Affected individuals of Dentinogenesis imperfecta type Ⅱ were consecutively found in a five-generation family. The morbidity of the offsprings is nearly 1/2 and no sexual difference is found. The analysis of clinical features as well as dental x-ray check showed specific finding that were not found in other families. Conclusion Dentinogenesis imperfecta type Ⅱ in this Mongolian family pertains to autosomal dominant disorder with high genetic heterogeneity in clinical phenotype. Further study is warranted to identify the association of this heterogeneity with lifestyle or genetic information.
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Objective To explore the polymorphism at position G460W of ?-ADDUCIN and at position C825T of GNB3,and the genetic interaction between ?-ADDUCIN and GNB3 genes in a QiQihr essential hypetension population.Methods Three hundreds and thirty-one patients with EH and two hundreds and ninety-three healthy controls were enrolled.Genotyping was performed using PCR-RFLP technique.Results(1)genotype distributions of ?-ADDUCIN G460W(GG 0.177 vs 0.160,GW 0.580 vs 0.481,WW 0.242 vs 0.359,P=0.006) and GNB3(CC0.177 vs 0.353,CT 0.468 vs 0.541,TT 0.355 vs 0.106,P
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Objective To investigate association of the ER22/23EK polymorphism of the glucocorticoid receptor gene(GR) with natural longevity in the XinJiang Uygur nationality people and the race difference.Methods One hundred and nintyone healthy individuals over 90 years old from Uighur people were recruited as the longevity group at the same time,82 Han nationality people aged between 65～70 who immigrated in Xinjiang Hetian for more than 30 years were randomly selected and investigated.Genotyping was performed by PCR-SSP,PCR-RELP and PCR-sequencing.ResultsThe frequencies of ER22/23EK alleles and genotypes showed no significant difference between the longevity group and the controls in Uygur,but the carriers of ER22/23EK of GR gene in Xinjiang Han old folkswere significantly more than those in Uygurs,the frequencies of WM, MM genotypes and M allele were significantly higher in Han nationality,while the frequencies of WW genotype and W allele were significant lower.Conclusion There is possibly no association between ER22/23EK polymorphism and XinJiang Uygur natural longevity,but there are significant differences between the two ethnic groups.
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@#ObjectiveTo investigate the relationship of the polymorphism of endothelial nitric oxide synthase (eNOS), the 27-bp variable number of tandem repeats (VNTR) in intron 4 with essential hypertension (EH) of the northern Han nationality in China.MethodsGenotypes, the level of plasma nitric oxide metabolites (NOx) and the activity of nitric oxide synthase (NOS) of 207 EH subjects and 231 healthy subjects were measured by polymerase chain-reaction (PCR).ResultsThe frequencies of ecNOS4a/a,ecNOS4b/a, and ecNOS4 b/b in the healthy group were 0.43%, 13.42% and 86.15% respectively. The frequency of the b allele was 92.86%, and the frequency of the a allele was 7.14%. While the frequencies of ecNOS4 a/a, ecNOS4 a/b,and ecNOS4 b/b in the EH group were 0.49%, 19.32% and 80.19% respectively. The frequency of the a allele in EH group (n=42, 10.15%) was significantly higher than that in the healthy group (n=33, 7.14%)(P<0.05). The plasma NOx level of the EH group was 70.04±14.68 mol/L, and significantly lower than that 84.09±27.27 mol/L in the healthy group (P<0.05). Similarly, both the plasma TNOS and iNOS activities of the EH group were 35.49±12.8 U/ml and 14.92±7.93 U/ml, and markedly lower than that 41.47±13.2 U/ml and 10.11±6.21U/ml in the healthy group (P<0.05). But the activities of eNOS in the EH group and healthy group were not significantly different (P>0.05).ConclusionThe variations of ecNOS4 gene locus may be responsible for the decrement of plasma NOx, both plasma NOx level and activity of NOS decreases in EH patients, so it may be a genetic susceptibility marker for EH of the Han nationality in China.
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<p><b>OBJECTIVE</b>Human leukocyte antigen (HLA) class II genes, especially HLA-DQ genes, which are highly polymorphic, have been thought to be candidate loci for the etiology of asthma, and shown to be involved in antigenic presentation. This study was conducted to investigate whether susceptibility or resistance to asthma is associated with HLA-DQA1 and DQB1 genes polymorphism.</p><p><b>METHODS</b>Venous blood samples were collected from northern Chinese population with Han ethnic. (1) One hundred and twenty-five unrelated asthmatic individuals and 52 subjects from 12 asthmatic pedigrees. (2) Ninety-six healthy controls without asthma and atopy with the same ethnic. Genomic DNA was extracted using standard phenol-chloroform method. The second exon of HLA-DQA1 and DQB1 genes were amplified by sequence-specific primer-polymerase chain reaction (SSP-PCR) method. All asthmatics had their serum IgE (total and specific) antibody or skin-prick test measured, bronchial reactivity to methacholine (Mch) and bronchial reversibility by beta(2)-agonist evaluated.</p><p><b>RESULTS</b>HLA-DQA1 * 0104 allele and HLA-DQB1 * 0201 allele were significantly higher in asthmatics than those in healthy controls (0.408 vs 0.177, P < 0.01; 0.568 vs 0.198, P < 0.01). Odds ratios (ORs) were 3.203 (95% CI 1.699 - 6.037), 5.328 (95% CI 2.883 - 9.849) respectively. Conversely, HLA-DQA1 * 0301 allele and HLA-DQB1 * 0301 were significantly decreased in asthmatics compared to healthy controls (0.296 vs 0.50, P < 0.01; 0.4 vs 0.563, P < 0.05); Logistic regression analysis showed that HLA-DQA1 * 0104 allele was associated independently with asthma etiology, OR [represented by Exp(B)] was 5.0942 with 95% CI 2.2520 - 21.1813; Spearman's analysis showed that HLA-DQA1 * 0104 allele and HLA-DQB1 * 0201 allele were positively associated with atopy, the correlation coefficient were 0.183 and 0.289 respectively, P < 0.01. By contrast, HLA-DQA1 * 0301 allele was negatively related to atopy, the correlation coefficient was -0.168, P < 0.05; linkage analysis did not support the view that HLA-DQA1/DQB1 genes were linked to asthma with LOD value being 0.72.</p><p><b>CONCLUSIONS</b>HLA-DQA1 * 0104 allele and HLA-DQB1 * 0201 allele were implicated in susceptibility to asthma and atopy, HLA-DQA1 * 0301 allele and HLA-DQB1 * 0301 might be protective factor against asthma. Asthma and atopy are multifactorial disorders, HLA-DQA1 and DQB1 genes are involved in the regulation of immune specific response to common allergen.</p>