Association between 5-HTR1A gene C-1019G polymorphism and antidepressant response in patients with major depressive disorder:A meta-analysis

BACKGROUND Major depressive disorder(MDD)is a substantial global health concern,and its treatment is complicated by the variability in individual response to antide-pressants.AIM To consolidate research and clarify the impact of genetic variation on MDD treatment outcomes.METHODS Adhering to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines,a systematic search across PubMed,EMBASE,Web of Science,and the Cochrane Library was conducted without date restrictions,utilizing key terms related to MDD,serotonin 1A receptor polymorphism(5-HTR1A),C-1019G polymorphism,and antidepressant response.Studies meeting inclusion criteria were thoroughly screened,and quality assessed using the Newcastle-Ottawa Scale.Statistical analyses,includingχ2 and I²values,were used to evaluate heterogeneity and fixed-effect or random-effect models were applied accordingly.RESULTS The initial search yielded 1216 articles,with 11 studies meeting criteria for inclusion.Analysis of various genetic models showed no significant association between the 5-HTR1A C-1019G polymorphism and antidepressant efficacy.The heterogeneity was low to moderate,and no publication bias was detected through funnel plot symmetry and Egger's and Begg's tests.CONCLUSION This meta-analysis does not support a significant association between the 5-HTR1A C-1019G polymorphism and the efficacy of antidepressant treatment in MDD.The findings call for further research with larger cohorts to substantiate these results and enhance the understanding of antidepressant pharmacogenetics.

E670G polymorphism of PCSK9 gene of patients with coronary heart disease among Han population in Hainan and three provinces in the northeast of China

Objective: To investigate the correlation between E670 G polymorphism of proprotein convertase subtilisin/kexin type 9(PCSK9) gene and coronary heart disease(CHD), and contrastively study the regional differences of E670 G polymorphism of PCSK9 gene between patients with CHD among the Han population in Hainan and three provinces in the northeast of China(TPNC), providing scientific basis for prevention and treatment of patients with CHD in different regions. Methods: A total of 233 cases of patients with CHD were selected from the Han population in Hainan and TPNC as the experimental group(118 cases from Hainan, 115 cases from TPNC), and 239 cases with non-CHD were selected among the Han population also in the two regions as control group(125 cases from Hainan, 114 cases from TPNC). The triglyceride(TG), total cholesterol(TC), high density lipoprotein cholesterol and low density lipoprotein cholesterol(LDL-C) levels of plasma were tested and PCR-RFLP method was used to test the E670 G polymorphism of PCSK9 gene. The statistical software package SPSS 21.0 was used for the statistical analysis and P<0.05 was considered as statistically significant. Results: The levels of systolic pressure, diastolic blood pressure, fasting blood sugar, TC, TG, and LDL-C of patients in CHD group were significantly higher than those in non-CHD group, while the high density lipoprotein cholesterol level was lower than that in non-CHD group(P<0.05). In CHD group, the frequencies of AG, GG genotypes of PCSK9 gene and G allele were higher than those in non-CHD group(P<0.05), and in CHD group, the frequencies of AG, GG genotypes and G allele of patients both in Hainan and TPNC were higher than those in control group(P<0.05). Among the patients with CHD, the frequencies of GG genotype and G allele of patients in Hainan were lower than those in TPNC(P<0.05), and in CHD group, the levels of TG, TC and LDL-C of GG genotype were higher than those of AA genotype(P<0.05). While in non-CHD group, there were no significant differences between the frequencies of GG genotype and G allele of patients in Hainan and TPNC(P>0.05). Conclusions: There was a close correlation between the E670 G polymorphism of PCSK9 gene and CHD with serum lipid level. Among Han population in Hainan and TPNC, the E670 G polymorphism of PCSK9 gene of patients with CHD exhibited regional differences.

Association between essential hypertension and polymorphisms of beta 1 adrenergic receptor gene G1165C (Gly389Arg) in Chinese Mongolian population

BACKGROUND： The prevalences of hypertension, cerebrovascular diseases, etc. are higher in Mongolian population because of the influence of various factors including genetics, geography, diet, etc. Therefore, it is helpful to develop researches on the genetics of various diseases including hypertension in Mongolian population. OBJECTIVE： To analyze the association between the polymorphism of beta1 adrenergic receptor （β1-AR） gene G1165C （Arg389Gly）, an important candidate gene for various diseases of cardiovascular system, and essential hypertension in Mongolian population. DESIGN ： A cross-sectional study SETTINGS： Department of Neurology, the First Affiliated Hospital of Inner Mongolia Medical College; Wulate Houqi Red Cross Society. PARTICIPANTS： The survey was carried out from February 2003 to March 2005. Totally 239 Mongolian residents, whose blood relations of 3 generations were all Mongolians, were selected from Wulate Houqi, Inner Mongolia, and they were all informed with the survey and detected items. Based on the diagnostic standard of hypertension set by WHO in 1999, the subjects were divided into two groups according to the level blood pressure： ① Normal blood pressure group （n=117）： systolic blood pressure （SBP） 〈 140 mm Hg （1 mm Hg =0.133 kPa）, diastolic blood pressure （DBP） 〈 90 mm Hg, and those having histories of cerebrovascular disease, heart disease, diseases of liver, kidney and tiroides, and diabetes mellitus were excluded. ② Essential hypertension group （n=122）： including 51 patients with simple high SBP. All the enrolled subjects had no blood relationship with each other, and had no history of miscegenation. METHODS ： The body height, body mass, waist circumference and blood lipids were measured routinely, and their habits of smoking and drinking were also investigated. Penpheral venous blood （5 mL） was drawn, the genome DNA was extracted, and the polymorphisms of the β1-AR Gl165C （Gly389Arg） genotype were detected with the Sequenom system. Polymerase chain reaction （PCR） experiment and SNP detection were performed in Huada Gene Laboratory of Bejing, then the univariate analysis of variance was applied in the sample comparison among groups, and the chi-square test was used to compare the genotypes and allele frequencies. The odd ratio （OR） and 95% confidence interval （CO were calculated. MAIN OUTCOME MEASURES： The distributions of β1-AR Gl165C （Gly389Arg） genotypes and alleles were observed. RESULTS： A11 the 239 subjects were involved in the analysis of results, and no one missed, ①Comparison of β1-AR G1165C （Gly389Arg） genotypes and allele distnbutions： In Mongolian population, the frequencies of CC and GG＋GC genotypes at β1-AR G1165C （Gly389Arg） site in the essential hypertension group （72%, 28%） were not significantly different from those in the normal blood pressure group （67%, 33%） （xz=0.841, P=-0.359; OR 0.773, 95%Cl： 0.445-1.342）; The frequencies of C and G alleles also had no significant differences between the essential hypertension group （85%, 15%） and the normal blood pressure group （82%, 18%） （x^2=1.136, P=-0.287; OR： 0.769, 95%Cl： 0.747-1.248）. ②The frequencies of CC and GG＋GC genotypes at β1-AR G1165C （Gly389Arg） site had no significant differences between the patients with simple high SBP （71%, 29%） and the normal blood pressure group （x^2=0.250, P=-0.617; OR： 0.833, 95%C/： 0.408-1.703）; The frequencies of C and G alleles were not significantly different between the patients with simple high SBP （86%, 14%） and the normal blood pressure group （x^2=0.670, P=-0.413; OR 0.766, 95%Cl： 0.404-1.453）. CONCLUSION： In Mongolian population, the distributions of the genotypes and alleles of β1-AR Gl165C （Gly389Arg） have no obvious differences between the subjects with normal blood pressure and the patients with essential hypertension （including simple SBP increase）, which suggests that G1165C （Glu389Asp） site of β1-AR gene may be not a genetic mark of essential hypertension and simple high SBP in Mongolian population.

The proprotein convertase subtilisin/kexin type 9 geneE670G polymorphism and serum lipid levels in the Guangxi Bai Ku Yao and Han populations

Background The association of E670G polymorphism in the proprotein convertase subtilisin/kexin type 9 (PCSK9) gene and serum lipid profiles is inconsistent in dif- ferent ethnic groups.Bai Ku Yao is a special subgroup of the Yao minority in China.The present study was undertaken association of PCSK9 E670G polymorphism and several environmental factors with serum lipid levels in the Guangxi Bai Ku Yao and Han populations.Methods A total of 649 subjects of Bai Ku Yao and 646 participants of Han Chinese were randomly selected from our previous stratified randomized cluster samples.Genotyping of the PCSK9 E670G polymorphism was performed by polymerase chain reaction and restriction fragment length polymorphism combined with gel electrophoresis,and then confirmed by direct sequencing. Results The levels of serum total cholesterol(TC),high-density lipoprotein cholesterol(HDL-C),low-density lipoprotein cholesterol(LDL-C) and apolipoprotein(Apo) AI were lower in Bai Ku Yao than in Han(P【0.01 for all).The frequency of A and G alleles was 98.00%and 2.00%in Bai Ku Yao,and 95.20%and 4.80%in Han(P【0.01);respectively. The frequency of AA,AG and GG genotypes was 95.99%,4.01%and 0%in Bai Ku Yao,and 91.02%, 8.36%and 0.62%in Han(P【0.01);respectively.There were also significant differences in the genotypic and allelic frequencies between n and the ratio of ApoAI to ApoB in Han Chinese but not in Bai Ku Yao were different between the AA and AG/GG genotypes(P【0.05 for all).The G allele carriers had higher serum HDL-C and higher ApoAI to ApoB ratio than the G allele noncarriers.When serum lipid parameters in Han were analyzed according to sex,the G allele carriers had higher serum HDL and ApoAI levels in males (P【0.05),and lower ApoB level and higher ApoAI to ApoB ratio in females(P【0.05 for all).Multiple linear regression analysis showed that serum HDL-C levels were correlated with genotypes in both ethnic groups(P【0.05 each).Serum lipid parameters were also correlated with sex,age,body massindex,alcohol consumption,cigarette smoking,and blood pressure in both ethnic groups(P【0.05-0.001).Conclusions These results suggest that the PCSK9 E670G polymorphism is mainly associated with some serum lipid parameters in the Han population,both gender show different relations to different serum lipid parameters.The G allele carriers might have higher serum lipid profiles than the G allele noncarriers. ormal LDL-C(≤3.20 mmol/L) and high LDL-C subgroups (】 3.20 mmol/L,P【0.01;respectively) in Bai Ku Yao, and between normal ApoB(≤1.14 g/L) and high ApoB subgroups(】 1.14 g/L,P 【 0.01;respectively) in Han.

Relationships between cell cycle pathway gene polymorphisms and risk of hepatocellular carcinoma

AIM: To investigate the associations between the polymorphisms of cell cycle pathway genes and the risk of hepatocellular carcinoma(HCC). METHODS: We enrolled 1127 cases newly diagnosed with HCC from the Tumor Hospital of Guangxi Medical University and 1200 non-tumor patients from the First Affiliated Hospital of Guangxi Medical University. General demographic characteristics, behavioral information, and hematological indices were collected by unified questionnaires. Genomic DNA was isolatedfrom peripheral venous blood using Phenol-Chloroform. The genotyping was performed using the Sequenom Mass ARRAY i PLEX genotyping method. The association between genetic polymorphisms and risk of HCC was shown by P-value and the odd ratio(OR) with 95% confidence interval(CI) using the unconditional logistic regression after adjusting for age, sex, nationality, smoking, drinking, family history of HCC, and hepatitis B virus(HBV) infection. Moreover, stratified analysis was conducted on the basis of the status of HBV infection, smoking, and alcohol drinking.RESULTS: The HCC risk was lower in patients with the MCM4 rs2305952 CC(OR = 0.22, 95%CI: 0.08-0.63, P = 0.01) and with the CHEK1 rs515255 TC, TT, TC/TT(OR = 0.73, 95%CI: 0.56-0.96, P = 0.02; OR = 0.67, 95%CI: 0.46-0.97, P = 0.04; OR = 0.72, 95%CI: 0.56-0.92, P = 0.01, respectively). Conversely, the HCC risk was higher in patients with the KAT2 B rs17006625 GG(OR = 1.64, 95%CI: 1.01-2.64, P = 0.04). In addition, the risk was markedly lower for those who were carriers of MCM4 rs2305952 CC and were also HBs Ag-positive and non-drinking and nonsmoking(P < 0.05, respectively) and for those who were carriers of CHEK1 rs515255 TC, TT, TC/TT and were also HBs Ag-negative and non-drinking(P < 0.05, respectively). Moreover, the risk was higher for those who were carriers of KAT2 B rs17006625 GG and were also HBs Ag-negative(P < 0.05).CONCLUSION: Of 12 cell cycle pathway genes, MCM4, CHEK1 and KAT2 B polymorphisms may be associated with the risk of HCC.

No association between a polymorphism of the adenylate cyclase type IX gene and major depressive disorder in the Chinese Han population

Previous studies have demonstrated that a missense single-nucleotide polymorphism variant （2316A〉G;rs2230739）of the adenylate cyclase type IX gene was associated with bipolar disorder and affective disorder.We determined genotype and allele frequencies using a ligase detection reaction method in 315 patients with major depressive disorder and 278 unrelated, sex-matched healthy control subjects.We did not detect any statistically significant differences in genotype and allele frequencies between patients and healthy control subjects.Furthermore,we found no significant difference between genders in major depressive disorder,nor between patients and controls in the same gender.These results suggest that 2316A〉G（rs2230739）may not be a risk factor for increasing susceptibility to major depressive disorder in the Chinese Han population.

G-protein beta 3 subunit polymorphisms and essential hypertension： a case-control association study in northern Han Chinese

Objective To explore the association between the three polymorphisms [ C825T, C1429T and G（-350）A] of the gene encoding the G protein beta 3 subunit （GNB3） and hypertension by performing a case-control study in the northern Han Chinese population. Methods We recnaited 731 hypertensive patients and 673 control subjects （the calculated power value was 〉 0.8）. Genotyping was performed to identify C825T, C1429T and G（-350）A polymorphisms using the TaqMan assay. Comparisons of allelic and genotypic frequencies between cases and controls were made by using the chi-square test. Logistic regression analyses were performed to investigate the relationships between the three polymorphisms of GNB3 gene under different genetic models （additive, dominant and recessive models）. Results The genotype dis- tribution and allele frequencies of C825T, C1429T and G（-350）A polymorphisms did not differ significantly between hypertensive patients and control subjects, either when the full sample was assessed, or when the sample was stratified by gender. No significant association was observed between C825T, C 1429T and G（-350）A polymorphisms and the risk of essential hypertension in any genetic model. Linkage dis- equilibrium was only detected between C825T and C 1429T polymorphisms. Haplotype analyses observed that none of the three estimated haplotypes significantly increased the risk of hypertension. Conclusions Our study suggested that the GNB3 gene polymorphisms [C825T, C 1429T and G（-350）A] were not significantly associated with essential hypertension in northern Han Chinese population.

Association of Interleukin-6-174G/C Polymorphism with the Risk of Diabetic Nephropathy in Type 2 Diabetes:A Meta-analysis

Previous studies reported the association between interleukin-6(IL-6)-174G/C gene polymorphism and the risk of diabetic nephropathy in type 2 diabetes mellitus(T2DN).However,the results remain controversial.In the present study,we conducted a meta-analysis to further examine this relationship between IL-6-174G/C gene polymorphism and T2DN.Three databases(PubMed,SinoMed and ISI Web of Science)were used to search clinical case-control studies about IL-6-174G/C polymorphism and T2DN published until Apr.14,2018.Fixed-or random-effects n lodels were used to calculate the effect sizes of odds ratio(OR)and 95%confide nee intervals(95%CI).Moreover,subgroup analysis was performed in tenns of the excretion rate of albuminuria.All the statistical analyses were con ducted using Stata 12.0.A total of 11 case-control studies were included in this study,involving 1203 cases of T2DN and 1571 cases of T2DM without DN.Metaanalysis showed that there was an association between IL-6-174G/C polymorphism and increased risk of T2DN under the allelic and recessive genetic models(G vs.C:OR=1.10,95%CI 1.03-1」&P=0.006;GG vs.CC+GC:OR=1.11,95%CI 1.02-1.21,P=0.016).In the subgroup analysis by albuminuria,a significant association of IL-6-174G/C polymorphism with risk of T2DN was noted in the microalbuminuria group under the recessive model(OR=1.54,95%CI 1.02-2.32,P=0.038).In conclusion,this meta-analysis suggests that IL-6-174G/C gene polymorphism is associated with the risk of T2DN.

血管紧张素转换酶2基因9570A/G多态性与冠状动脉狭窄程度的相关分析

目的:探讨皖北地区汉族人群血管紧张素转换酶2(ACE2)基因9570A/G多态性与冠心病(CHD)患者冠状动脉狭窄程度的关系。方法:采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术检测120例CHD患者ACE2基因多态性,并根据冠脉造影病变支数和Genisini积分进行基因型和等位基因频率分析比较。结果:在男性CHD组中,9570G基因型者冠状动脉病变支数和Genisini积分均多于9570A基因型者(P<0.05);在女性CHD组中,不同基因型与冠脉病变支数及Genisini积分无明显不同(P>0.05)。结论:ACE2基因9570A/G多态性与皖北地区汉族人群男性CHD冠脉狭窄程度具有一定关系,与女性无明显关系。

HLA-G 3′UTR基因多态性及血清可溶性HLA-G水平与儿童诺如病毒感染的相关性研究

目的探讨人类白细胞抗原-G(HLA-G)3′非翻译区(3′UTR)基因多态性(SNP)及血清可溶性HLA-G(sHLA-G)水平与儿童诺如病毒感染的相关性。方法选取2021年1月至2022年12月新乡医学院第一附属医院收治的346例诺如病毒感染患儿作为病例组,另选取同期320例健康体检儿童作为对照组,留取所有研究对象全血标本并提取DNA。采用聚合酶链反应扩增HLA-G 3′UTR基因,产物外送测序。使用SNPstats在线分析软件计算两组间SNP位点基因型和等位基因分布频率。采用酶联免疫吸附试验检测病例组和对照组血清sHLA-G水平。结果病例组和对照组HLA-G 3′UTR 14 bp+/-和+3142 C/G基因型和等位基因分布频率比较,差异均无统计学意义(P>0.05)。病例组血清sHLA-G水平明显高于对照组,差异有统计学意义(P<0.05);诺如病毒不同程度感染组血清sHLA-G水平比较,差异均无统计学意义(P>0.05)。病例组和对照组14 bp+/-基因型和+3142 C/G基因型对应的血清sHLA-G水平比较,差异均无统计学意义(P>0.05)。结论HLA-G 3′UTR SNP与诺如病毒感染的易感性无关。血清sHLA-G水平对诺如病毒感染早期诊断有较好的预测价值,可能是一种新的血清生物标志物,与患者病情严重程度及预后的关联尚需进一步验证。

Association between G-protein β3 subunit gene and isolated systolic blood pressure elevation of greater than 130 mmHg: A large-scale cross-sectional study in the Japanese population

AIM To investigate whether GNB3 C825 T single nucleotide polymorphism(SNP) contributes to systolic blood pressure(SBP) ≥ 130 mmH g in a large-scale cross-sectional study among the Japanese population with diastolic blood pressure(DBP) < 85 mmH g. METHODS We analyzed 11008 Japanese subjects, including 2797 cases(SBP ≥ 130 and DBP < 85 mmH g) who were not taking anti-hypertensive medication and 8211 controls(SBP < 130 and DBP < 85 mmH g), all of whom enrolled in the genome banking project of the 21 st Century COE(Center of Excellence) Program at Jichi Medical University. Subjects were divided into four groups according to gender(male and female) and age(≤ 49 years and ≥ 50 years). GNB3 gene polymorphism was determined using the TaqM an probe method. We compared the frequencies of alleles and genotypes between cases and controls by chi-squared test. The strength of the associations was estimated by odds ratios(ORs) and 95%CI by using logistic regression analysis. The ORs were adjusted for age and body mass index. RESULTS Allele and genotype distributions significantly differed between cases and controls only in males aged ≤ 49 years. Compared to the CC genotype, a significant OR was obtained in the TT genotype among males aged ≤ 49 years.CONCLUSION This study indicates that the TT genotype of the GNB3 C825 T SNP may contribute to SBP elevation of greater than 130 mmH g compared to the CC genotype in Japanese males aged ≤ 49 years.

The Frequency of rs1799889 in Plasminogen Activator Inhibitor Type-1 Gene in Sudanese Type 2 Diabetic Patients, Gezira State, Sudan, 2020-2021

Background and Objectives: The cornerstone of the regulation fibrinolytic system is plasminogen activator inhibitor type-1. The 4G/5G polymorphism in the PAI-1 gene is a key genetic predictor of increased plasma levels which is the most polymorphism associated with cardiovascular complications. The 4G carriers have six times higher PAI-1 levels than 5G carriers leading to an increase in the level of plasma inhibitor by about 25% more than 5G allele (wide type). Type 2 diabetes presents symptoms of hypercoagulability and hypofibrinolytic system that lead to contribute in the atherothrombosis and then the myocardial infarction (MI). These findings supported the hypothesis that there is a link between diabetes patients and this SNP. There is no data about the prevalence of this allele in Sudanese diabetic patients with type 2 and the allele differs in prevalence according to ethnicity, for these reasons, the aim of this study was to determine the allele and genotype frequency of the rs1799889 among Sudanese T2DM patients. Methods: A case-control study was conducted using 70 diagnosed diabetes type 2 patients and 50 healthy individuals as the control group. AS-PCR technique was used to genotype the rs1799889, and the allelic frequency was calculated according to Hardy-Weinberg equilibrium. Allelic frequencies were assessed using gene counting (SNP-STAT software V. Release 3.13), and genotypes were scored. Results: The result showed that 4G allele frequency was 28% among Sudanese diabetic patients without statistical difference when compared with control group (P-value = 0.998) but, high when compared with other studies in African population 13% and very low when compared with white and Indian populations studies. Conclusion: By this study, the allele frequency was higher in Sudanese diabetic patients with type 2, and also we need another study to evaluate the effect of this polymorphism in thrombophilic complications in Sudanese diabetic patients with type 2.

β-纤维蛋白原-455 G/A基因多态性对缺血性脑卒中患者血浆纤维蛋白原水平的影响

为了分析 β 纤维蛋白原 4 5 5G A(β Fg 4 5 5G A)基因多态性与环境因素对血浆Fg水平及缺血性脑卒中发病的影响 ,应用聚合酶链反应 (PCR)及限制性内切酶分析的方法 ,分析了 10 4例缺血性脑卒中患者及 15 6例健康人的 β Fg 4 5 5G A基因多态现象 ,用比浊法测定血浆Fg水平。研究结果显示 ,病例组血浆Fg水平明显高于对照组 (P <0 .0 1)。无论男、女患者与对照相比 ,A等位基因携带者血浆Fg水平均比同组GG基因型者明显升高 (P <0 .0 5 )。对照组内只有A等位基因携带者随年龄增长血浆Fg水平有明显升高 (P <0 .0 5 )。病例组男性按吸烟及基因型情况分组 ,在GA基因型中 ,吸烟组血浆Fg水平高于不吸烟与戒烟组 (P <0 .0 5 ) ;GG基因型组吸烟与否对Fg水平无显著影响 (P >0 .0 5 )。病例组与对照组A等位基因频率分布无差异。结论提示 ,A等位基因携带者血浆Fg水平升高 ,并随年龄、吸烟而更加显著 ,提示 β Fg 4 5 5A等位基因携带者血浆Fg水平更易受环境因素影响而升高 ,故此基因多态性可用于易感人群的检测 。

G蛋白β3亚单位基因C825T多态性与高血压发病的关系

目的 观察高血压病 (EH)病人G蛋白 β3亚单位基因 (GNB3 )C82 5T多态性 ,探讨EH发生的遗传学机制。 方法 EH病人 112例 ,设对照组。取血标本提取DNA ,用PCR方法扩增目的基因 ,用限制性内切酶 (BseDⅠ )酶切PCR产物用于基因分型 ,同时观察血脂、体质量指数 (BMI)、EH家族史。结果 EH病人GNB3C82 5T基因型分布 (基因型频率CC =0 .3 4,CT =0 .5 3 ,TT =0 .13 )与对照组有显著差别 (基因型频率CC =0 .5 9,CT =0 .3 6,TT =0 .0 5。 χ2 =6.9,P <0 0 5 ) ;Logis tic回归分析显示 ,C82 5T等位基因与EH关联最密切 (OR =2 .2 ,95 %CI 1.1～ 4.6)。结论 GNB3基因C82 5T多态性的T等位基因是EH发病的遗传危险因子。

G蛋白β_3亚单位基因C825T多态性与原发性高血压

目的 探讨G蛋白β3 亚单位基因C82 5T多态性与国人原发性高血压以及高血压左室肥厚 (LVH)、血脂水平之间的关系。方法 采用多聚酶链式反应结合限制性内切酶片段长度多态分析方法 (PCR RFLP)检测 79例健康人和 146例高血压患者的G蛋白 β3 亚单位C82 5T多态性、体重指数 (BMI) ,并测定 12 8例高血压患者的总胆固醇(Tch)、甘油三脂 (TG)、空腹血糖 (Glu)及肌酐 (Cr)浓度和 10 3例高血压患者的左室质量指数 (LVMI)。结果 (1)高血压组G蛋白 β3 亚单位基因型频率 (CC2 4.7%、CT6 9.2 %、TT6 .2 % )、等位基因频率 (C5 9.2 %、T40 8% )与正常对照组基因型频率 (CC2 2 .8%、CT6 3.3%、TT13.9% )、等位基因频率 (C5 4.4%、T45 .6 % )比较无显著性差异 ;(2 )CC基因型患者与CT +TT基因型患者比较 ,BMI、LVMI、血脂水平间亦无显著性差异。结论 提示G蛋白 β3 亚单位基因C82 5T多态性可能与中国人原发性高血压及其LVH。

根据UGT1A4 142T>G基因多态性和丙戊酸血药浓度定量估算我国汉族癫痫儿童体内拉莫三嗪的血药浓度

目的:探讨尿苷二磷酸葡糖醛酸转移酶(UGT)1A4 142T>G基因多态性和丙戊酸(VPA)血药浓度对我国南方汉族癫痫儿童体内拉莫三嗪(LTG)血药浓度的影响,并建立定量估算LTG血药浓度的预测方程。方法:选取2010年1月-2016年9月于广州市妇女儿童医疗中心就诊的南方汉族癫痫患儿72例,均采用LTG+VPA联合治疗。采用液相色谱-串联质谱法和酶放大免疫分析法分别测定患儿体内LTG和VPA的血药浓度,采用限制性片段长度多态性聚合酶链反应法测定其UGT1A4 142T>G多态性,并考察患儿年龄、性别、VPA血药浓度、UGT1A4 142T>G多态性与LTG标准化血药浓度(CDR)的相关性,并采用多重线性回归分析建立LTG血药浓度的预测方程。结果:患儿年龄、VPA血药浓度与LTG CDR呈正相关(r分别为0.225、0.300,P<0.05);性别对LTG CDR的影响无统计学意义(P>0.05)。共检出UGT1A4 TT、TG、GG基因型各39、29、4例,各基因型频率均符合HardyWeinberg平衡(P>0.05);TT基因型患儿LTG CDR显著低于TG、GG基因型,差异均有统计学意义(P<0.05)。多重线性回归分析结果显示,患儿LTG剂量(x_1)、体质量(x_2)、VPA血药浓度(x_3)、UGT1A4 142T>G多态性(x4)与LTG血药浓度有关(P<0.05);以LTG血药浓度为因变量(c),上述因素为自变量,得回归方程为c=0.794+0.032x_1-0.057x_2+0.010x_3+0.532x_4(R^2=0.616,P<0.05;其中,UGT1A4 TT基因型为0,TG、GG基因型为1),且LTG预测血药浓度和实测血药浓度的相关性良好(r=0.785,P=0.001)。结论:癫痫患儿的LTG剂量、体质量、VPA血药浓度、UGT1A4 142T>G多态性可能与LTG血药浓度有关;本研究建立的预测方程可为我国南方汉族癫痫患儿的精准用药提供参考。

G蛋白β3亚单位基因C825T多态性对氨氯地平降压效果的影响

目的探讨G蛋白β3亚单位基因C825T多态性与氨氯地平降压疗效的关系。方法采用多聚酶链式反应结合限制性内切酶片段长度多态分析方法,检测147例健康人和321例原发性高血压患者的G蛋白β3亚单位C825T多态性,其中48例高血压患者口服氨氯地平4周。结果1)高血压组G蛋白β3亚单位C825T多态性中基因型频率(CC 28.7%、CT52.0%、TT 19.3%)、等位基因频率(C 54.7%、T 45.3%)与正常对照组基因型频率(CC 27.2%、CT 46.9%、TT 25.9%)、等位基因频率(C 50.7%、T 49.3%)比较差异无统计学意义;2)CC基因型的收缩压降低值〔(4.93±2.26)kPa(37.00±16.97)mmHg〕明显高于CT+TT基因型〔(2.99±1.41)kPa(22.40±10.60)mmHg〕(P<0.05)。结论G蛋白β3亚单位基因C825T多态性与氨氯地平的降压疗效相关,而与原发性高血压无关。

中国部分地方鸡种MHC B-G基因第二外显子的遗传多态性

根据鸡主要组织相容性复合体BG基因序列设计特异性引物,在9个中国地方鸡种和1个国外引进鸡种基因组中扩增了包括其第一内含子和第二外显子在内、长度为401bp的DNA片段。经PCRSSCP分型筛选后,对该片段的核苷酸序列进行克隆测序和直接PCR测序及比对分析,发现了31个MHCBG新等位基因;各等位基因主型所含有的亚型数及其在不同品种间的分布极不均衡。第二外显子核苷酸序列和其所编码的MHCBG抗原类IgV结构域氨基酸序列比较表明,在中国地方鸡种BG基因第二外显子的207bp序列中有37个多态性变异位点,其中简约性信息位点29个,单个位点的变异8个;等位基因间的遗传变异范围0.0013-0.1433;各变异位点的核苷酸变异指数0.206-1.462。该编码区核苷酸的异义替换率为9.26%±1.92%,高于同义替换率2.34%±0.90%。所估计的核苷酸转换数和颠换数随着遗传距离的增加而逐渐增加,当核苷酸转换数和颠换数达到平衡后,该片段核苷酸转换数的增加幅度逐渐高于颠换数。在其所编码的类IgV结构域氨基酸序列中,多态变异位点有22个,其中简约性信息位点6个,单变异位点16个;所估测的等电点为8.45,疏水性氨基酸占40.3%,亲水性氨基酸占29.9%;该序列具有明显的疏水性特点。等位基因间的系统发生分析表明,31个BG等位基因分为两个群,相同主型的等位基因首先聚类。

云南傣族、汉族HLA-G基因14bp插入/缺失多态性研究

14bp插入/缺失多态性是指存在于HLA-G基因第8外显子3′非翻译区(3′UTR)的一个插入/缺失多态,因其能影响HLA-GmRNA的稳定性,并进一步影响HLA-G蛋白的翻译而受到广泛关注。文章采用PCR和电泳技术对云南傣族和汉族两个人群进行了HLA-G基因14bp插入/缺失多态性的检测分析,结果显示傣族和汉族人群+14bp等位基因频率分别为31.97%和40.87%,+14bp/+14bp基因型频率分别为8.20%和17.31%,+14bp/-14bp基因型频率分别为47.54%和47.11%。与国内外已报道的其他人群的数据比较表明:云南汉族群体中HLA-G基因14bp插入/缺失的分布与其他群体相似;傣族则有自己独特的基因型和等位基因分布特点,推测其可能受到了遗传漂变的作用,但不排除自然选择作用的影响。

错配修复基因hMSH2多态性IVS+9C→G与胃癌发病关系的研究

目的:探讨错配修复基因hMSH2多态位点IVS1+9C→G在胃癌发病中的作用。方法:应用PCRDHPLC和DNA序列分析技术检测126例健康人、72例散发性胃癌患者和71例有家族史胃癌患者的外周血DNA,采用病例对照研究方法分析hMSH2基因IVS1+9C→G多态性与胃癌发病的关系。结果:42例(33.3%)健康人、29例(40.3%)散发性胃癌患者和31例(43.7%)有家族史的胃癌患者检出hMSH2基因IVS1+9C→G。低龄(<50岁)胃癌患者中hMSH2基因IVS1+9C→G检出率(60%)高于正常人群(33.3%),P<0.05;在散发性胃癌患者中,病理分化程度低者其检出率(66.7%)高于分化程度较高者(19.2%),P<0.01;有家族史胃癌患者的检出率(43.7%)虽高于健康人(33.3%),但无显著性差异(P>0.05)。结论:hMSH2基因多态位点IVS1+9C→G可能影响部分胃癌的发病年龄,并对胃癌的分化程度起一定作用。提示hMSH2基因IVS1+9C→G的筛查可能成为胃癌风险评估的指标。