雌激素受体-α基因Xba Ⅰ、 Pvu Ⅱ和BstU Ⅰ多态性与男性骨量的关系

目的 了解雌激素受体-α（estrogen receptor-α,ER-α）基因多态性与男性骨密度（bone mineral density,BMD）的关系。方法 PCR-限制性片段长度多态性检测上海市388名46－80岁无血缘关系的健康汉族男性ER-α基因XhaⅠ、Pvu Ⅱ和BstUⅠ多态性，双能X线吸收仪检查腰椎1－4（L1-4）和股骨近端股骨颈（femoral neck）、大转子区（trochanter）和Ward＇s三角部位BMD。结果 被研究人群XhaⅠ和Pvu Ⅱ等位基因频率分布符合Hardy-Weinberg定律。未发现ER-α基因第1外显子区存在BstUⅠ多态性，所有对象均是BB基因型。XhaⅠ多态性与各部位BMD值均无相关；Pvu Ⅱ多态性与L1-4和Ward＇s三角部位BMD值均有关联（P＜0.05），Pp基因型在上部位平均BMD值明显高于PP和pp基因型（P＜0.05）。结论 本研究结果提示中国汉族人群缺乏或罕有ER-α基因BstUⅠ多态性；ER-α基因PvuⅡ多态性可能影响老年男性松质骨骨量的丢失。     

Association of the CT gene (CA) polymorphism with BMD in osteoporotic Mexican women

Calcitonin (CT) plays a role in the pathogenesis of osteoporosis and genetic variations in or adjacent to the CT gene may be associated with loss of bone mineral density (BMD). The correlation between a dinucleotide (cytosine-adenine) repeat polymorphism at the CT locus and BMD was examined in 70 osteoporotic women, 70 non-osteoporotic women and 500 subjects from the Mexican population. The allele A and genotype AA frequencies were significantly higher in osteoporotic women than in non-osteoporotic women (60% vs 32%; p < 0.0001 and 41% vs 14%; p = 0.0007, respectively). Genotype AA was associated with the presence of osteoporosis [odds ratio 2.58; 95% confidence interval (CI); 1.62-4.12]. Likewise, the loss of lumbar BMD and T scores were related to the presence of allele A: subjects with a single A allele displayed lower values for lumbar BMD and T score (84.02% and -1.51, respectively) than those who do not present any A allele (89.61% and -0.88, respectively). Individuals with two alleles A showed the lowest lumbar BMD and T-score values (73.77% and -2.51, respectively). Analysis of potential confounder demonstrated that aging has a significant effect on osteoporosis development (odds ratio 1.1; 95% CI; 1.1052-1.152).     

Association between single nucleotide polymorphisms of estrogen receptor alpha gene and efficacy of HRT on bone mineral density in post-menopausal Japanese women

BACKGROUND: Although HRT for post-menopausal women can protect against bone loss, variations in bone responses exist. We studied whether single nucleotide polymorphisms (SNP) of the estrogen receptor-alpha (ERalpha) gene contribute to the effect of HRT on lumbar spine bone mineral density (BMD). METHODS: Subjects were 84 post-menopausal women who had been taking HRT for 3 years to treat osteopenia or osteoporosis. Eighteen SNP in the ERalpha gene were characterized by a single nucleotide primer extension assay. RESULTS: Genotyping of the 84 individuals revealed that all SNP were quite common, the minor allele frequency being > or = 20%. A SNP in intron 6 (IVS6+14144) was significantly associated with the response to HRT for the first 3 years after starting treatment (P = 0.043, 0.025 and 0.032 for the first, second and third years respectively). Haplotype analysis revealed that a combination of SNP IVS6+14144 and IVS4+4238 was significantly correlated with the response to HRT; women with haplotype G-G (IVS6 14144-IVS4 4238) showed a significantly higher response (P = 0.014, 0.043 and 0.010 for the first second and third year respectively). CONCLUSIONS: These results suggest that a specific SNP and the haplotype of the selected SNP could be used to predict the effect of HRT on lumbar BMD.     

Effects of vitamin D and estrogen receptor gene polymorphisms on the changes in lumbar bone mineral density with multiple pregnancies in Japanese women

BACKGROUND: Our aims were to follow the longitudinal changes in lumbar spine bone mineral density (BMD) with multiple pregnancies, and to study whether polymorphisms in the vitamin D receptor (VDR) and estrogen receptor (ER) genes may influence the results. METHODS: We repeatedly measured the BMD of the lumbar spine (L2-L4) of 133 women who had undergone two successive pregnancies and 73 non-pregnant controls, and analysed the restriction fragment length polymorphisms using restriction endonucleases TaqI, ApaI and FokI for the VDR gene, and PvuII and XbaI for the ER gene. RESULTS: Cases and controls had no significant differences in the longitudinal BMD changes. The mean percentage change in lumbar BMD (DeltaBMD%) of the women with the XX/Xx genotype was significantly lower than that of the women with the xx genotype after adjusting for age at each delivery, BMD of the first scan, and interval between the scans (0.2 +/- 3.3 versus 2.0 +/- 4.2%; P=0.030, analysis of covariance). Multiple regression analyses to evaluate the contribution of the XbaI polymorphism of the ER gene on DeltaBMD% showed that the percentage decrease in BMD was greater for women lacking the XbaI restriction site (adjusted R2=0.188, P<0.0001). CONCLUSIONS: The present study suggests that the DeltaBMD% was significantly influenced by the XbaI polymorphism of the ER gene.     

Association of hepatocellular carcinoma risk with polymorphisms in tumour necrosis factor alpha gene in a Chinese Han population

Hepatocellular carcinoma (HCC) is the third leading cause of cancer‐related death worldwide. Studies have shown that the tumour necrosis factor alpha (TNF‐α) plays an important role in the development of HCC; however, the association between genetic variations of TNF‐α and HCC is not yet fully understood. To evaluate the correlation of TNF‐α polymorphisms with HCC, we randomly selected 327 HCC patients and 432 healthy controls, all these subjects reported Han nationality. Genotyping of four TNF‐α SNPs (rs1799724, rs1800629, rs1799964 and rs1800610) was performed using the matrix‐assisted laser desorption ionization‐time of flight mass spectrometry (MALDI‐TOF‐MS) method. Distributions of rs1799964 genotypes and rs1800610 alleles were found to be significantly different between cases and controls (p = .011, p = .001). The recessive model of rs1799964 significantly increased HCC risk (p = .0015), while the dominant and over‐dominant models of rs1800610 significantly reduced HCC risk (p = .0096, p = .014). Haplotype analysis of the four TNF‐α SNPs revealed that the TGTA haplotype was associated with a reduced HCC risk (p = .0033, OR = 0.53), while the TGTG haplotype was associated with an increased HCC risk (p = .0032, OR = 9.69). These findings indicated that specific TNF‐α polymorphisms may be associated with the susceptibility to HCC.     

Association of three single nucleotide polymorphisms of ESR1 with breast cancer susceptibility: a meta-analysis

Expression of estrogen receptors is correlated with breast cancer risk, but inconsistent results have been reported. To clarify potential estrogen receptor (ESR)-related breast cancer risk, we analyzed genetic variants of ESR1 in association with breast cancer susceptibility. We performed a meta-analysis to investigate the association between rs2234693, rs1801132, and rs2046210 (single nucleotide polymorphisms of ESR1), and breast cancer risk. Our analysis included 44 case-control studies. For rs2234693, the CC genotype had a higher risk of breast cancer compared to the TT or CT genotype. For rs2046210, the AA, GA, or GA + GG genotype had a much higher risk compared to the GG genotype. No significant association was found for the rs1801132 polymorphism with breast cancer risk. This meta-analysis demonstrates association between the rs2234693 and rs2046210 polymorphisms of ESR1 and breast cancer risk. The correlation strength between rs2234693 and breast cancer susceptibility differs in subgroup assessment by ethnicity.     

维生素D受体基因起始密码和3‘端多态性与绝经后妇女骨密度的关系

目的：了解维生系D受体（vitamin d receptor,VDR)基因起始密码多态性和3'端多态性对北京地区汉族绝经后妇女骨密度（bone mineral density,BMD)值的影响是否具有协同作用。方法：应用聚合酶链反应－限制性片段长度多态性检测了110绝经后妇女VDR基因Fok 1和3'端多态性，同时用双能X线吸收法测定绝经后妇女腰椎2－4（L2－4）、股骨颈、Ward's三角和大转子区的BMD值。结果：被研究人群Fok I、Apa I、Bsm I和Taq I等位频率分布均符合Hardy-Weinberg定律。单独分析各基因型与绝经后妇女BMD值的关系，仅显示Bsm I基因型与BMD值有关联（P＜0．05）；协同分析Fok I基因型和Apa I、Bsm I、Taq I基因型与BMD值的关系，显示Fok I-Apa I基因型与绝经后妇女L2－4 BMD值显著相关（P＜0．001），而未见Fok I-Bsm I基因型与绝经后妇女各部位BMD值的关联，Fok I-Taq I基因型与股骨颈和大转子区部位BMD值有关联（P＜0．05）。此外，未发现VDR基因3'端多态性之间与各部位的BMD值有关联。结论：VDR基因Fok I多态性虽然与绝经后妇女BMD值无关联，但Fok I多态性和3'端多态性（Apa I和Taq I）对绝经后妇女BMD值的影响具有协同作用。     

Association of NCOA2 gene polymorphisms with obesity and dyslipidemia in the Chinese Han population

Background: Nuclear receptor coactivator 2 (NCOA2) gene plays an important role in adipogenesis and lipid metabolism. NCOA2 gene null mice exhibited less fat accumulation and lower serum lipid levels, and were protected against obesity. Few studies are known to have analyzed the association of NCOA2 gene single nucleotide polymorphisms with obesity and serum lipid profile. Our study aimed to evaluate the association of NCOA2 gene polymorphisms with the risk of obesity and dyslipidemia in the Chinese Han population. Methods: Two NCOA2 gene polymorphisms (rs41391448 and rs10504473) were selected and genotyped in a Chinese Han cohort with 529 participants. The effect of different genotypes on BMI and serum lipid levels (TG, TC, LDL-C and HDL-C) was performed by the analysis of covariance. Association of NCOA2 polymorphisms with obesity and dyslipidemia was assessed by odds ratios (OR) and 95% confidence intervals (CI) under the unconditional logistic regression analysis. Results: Significant association was observed between rs10504473 polymorphism and obesity under the recessive model (OR = 1.88, 95% CI 1.02-3.45, P = 0.047; adjusted OR = 1.87, 95% CI 1.02-3.44, P = 0.048). However, no association remained significant after Bonferroni correction. Conclusion: Our study suggests a possible association between NCOA2 rs10504473 polymorphism and obesity, and this SNP may influence the susceptibility of obesity in the Chinese Han population.     

Association of NER pathway gene polymorphisms with susceptibility to laryngeal cancer in a Chinese population

We systematically analyzed the association of nine SNPs of seven key NER pathway genes with the development of laryngeal cancer patients, and investigated whether NER pathway polymorphisms could serve as potential biomarkers for laryngeal cancer risk. 271 patients with pathologically proven laryngeal cancer and 271 control subjects were included in our study. Genotyping of ERCC1 rs11615 and rs2298881, ERCC2 rs13181 and rs50871, ERCC3 rs4150441, ERCC4 rs6498486, ERCC5 rs2094258, XPA rs2808668 and XPC rs2228001 were analyzed by polymerase chain reaction (PCR) coupled with restriction fragment length polymorphism (RFLP). By conditional logistic regression analysis, individuals carrying the TT genotype of ERCC1 rs11615 were correlated with an increased risk of larynx cancer when compared with the CC genotype (OR=1.89, 95% CI=1.07-3.37; P value=0.02). Moreover, individuals with the GG genotype of ERCC2 rs50871 were associated with an elevated risk of larynx cancer when compare with the TT genotype (OR=2.03, 95% CI=1.15-3.63; P value=0.01). We found a significant interaction between ERCC2 rs50871 polymorphism and tobacco smoking in the risk of larynx cancer (P for interaction <0.05). In conclusion, our study showed that ERCC1 rs11615 and ERCC2 rs50871 polymorphisms could influence the risk of larynx cancer in Chinese population, particularly among smokers.     

Influence of polymorphisms in insulin-like growth factor-1 on the risk of osteoporosis in a Chinese postmenopausal female population

We conducted a case-control study in a Chinese postmenopausal population, and explore the potential role of the promoter region variation of the IGF-1 gene in bone mineral density and osteoporosis risk. 485 postmenopausal women with a primary diagnosis of osteoporosis and 485 age-matched controls were selected between 2012 and 2014. The Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) was used for rs35767, rs2288377 and rs5742612 of IGF-1 genotyping. By conditional regression analysis, individuals carrying TT genotype and CT+TT genotype of rs35767 were found to be correlated with an elevated risk of osteoporosis, with adjusted ORs (95% CI) of 1.90 (1.23-2.93) and 1.35 (1.04-1.76), respectively. Our study found that CT+TT genotype of rs35767 was significantly associated with moderate increased risk of osteoporosis in smokers and drinkers, and the ORs (95% CI) were 2.11 (1.06-4.20) and 2.36 (1.29-4.32), respectively. We found that those carrying CT+TT genotype of rs35767 had a significant lower BMD levels at L1-L4 vertebrae, femoral neck, total hip and trochanter compared to those with CC genotype. Our study suggests that TT genotype and CT+TT genotype of IGF-I rs35767 were associated with risk of osteoporosis and BMD levels.     

PATZ1基因单核苷酸多态性与无精症的关系

目的 研究PATZ1基因的4个单核苷酸多态性(single nucleotide polymorphism,SNP)rs2240424、rs2057951、rs2240427和rs714909的多态性与无精症的关系.方法 用PCR-限制性片段长度多态性分析方法,在180例无精症患者和190名正常男性中对上述4个SNP位点的基因频率和基因型频率分布进行调查.结果 rs2057951位点的等位基因C(35.0%vs.27.6%,P=0.031)和带有等位基因C个体(CT+CC)(57.8%vs.46.3%,P=0.027)的频率在无精症患者显著高于正常男性.4种SNP的单倍型在两组人群中的分布差异有统计学意义(P=0.01),单倍型ACAC(11.1%vs.6.6%,P=0.029)和ACGC(11.2%vs.5.2%,P=0.003)在无精症患者中显著高于正常男性.结论 PTAZ1的rs2057951位点的等位基因C和单倍型ACAC和ACGC增加无精症的易感性,提示PTAZ1基因可能与无精症发病相关.     

DNA修复基因XPC Ala499Val、Lys939Gln多态与肺癌易感性

目的 探讨中国人DNA修复基因XPC Ala499Val、Lys939Gln多态与肺癌易感性的关系。方法 以社区为基础的病例对照研究。经组织学确诊的肺癌病例320例,相同地区年龄和性别频数匹配的人群对照322人,以PER为基础的方法进行多态性检测,比较不同基因型与肺癌风险的关系,并探讨吸烟在其中的影响。结果 与携带499 Ala／Ala基因型者比较,携带至少1个499Val等位基因者（即Ala／Val和Val／Val基因型）肺癌风险增加1．54倍（95％CI=1．11～2．14）,而同时有499和939两个位点变异等位基因者肺癌风险增加2．55倍（95％CI=1．45～4．52）。交互作用分析显示,XPC 499Val变异基因型与吸烟具有超相乘模型的交互作用,同时有两个位点变异等位基因并吸烟者肺癌风险增加可高达7．36倍（95％CI=3．19～17．0）。结论 XPC Ala499Val和Lys939Gln多态可能与中国汉族人群肺癌遗传易感性有关,并可显著增加吸烟对肺癌的危险性。     

Association of polymorphisms of the oestrogen receptor alpha gene with the age of menarche

BACKGROUND: The age of menarche may be subject to hereditary influences, but the specific genetic determinants are largely unknown. We evaluated whether the XbaI and PvuII polymorphisms of the estrogen receptor alpha gene are associated with the age of menarche. METHODS: We performed genotyping for XbaI and PvuII in a cohort of 145 adolescent females from a closed community in North-Western Greece. RESULTS: There was strong linkage disequilibrium between the two polymorphisms. Menarche occurred later in girls with the XX genotype than in girls with the Xx or xx genotype (mean +/- SD: 13.36 +/- 1.24 versus 12.80 +/- 1.14 and 12.75 +/- 1.35 years respectively; P = 0.017). Menarche also tended to occur later in PP homozygotes than in Pp and pp subjects, but the difference was not significant (mean +/- SD: 13.09 +/- 1.29 versus 12.80 +/- 1.19 and 12.85 +/- 1.33 years respectively). The strongest effect was seen when the PX haplotype was considered [mean +/- SD: 13.43 +/- 1.18 years for homozygotes versus 12.76 +/- 1.25 years in heterozygotes and in subjects without the PX allele, P = 0.006]. CONCLUSIONS: We document that the XbaI polymorphism, and possibly PvuII, may be genetic determinants of the age of menarche.     

Association of vitamin D receptor gene polymorphisms with susceptibility to asthma in Tunisian children: A case control study

Background

Vitamin D and its nuclear receptor (VDR) are linked to asthma in a genetic and immunologic basis. Polymorphisms in the VDR gene may alter the actions of vitamin D and then influence the development and the severity of asthma.

Aims

We aimed at elucidating the genetic association of VDR gene polymorphisms with susceptibility to asthma in Tunisian children and with serum vitamin D levels.

Methods

The study included 155 patients recruited from Abderrahmen MAMI hospital in Tunisia and two hundred twenty five healthy individuals matched with patients in age and sex for comparison. VDR genotypes were determined by PCR-RFLP method using endonuclease FokI, BsmI, TaqI and ApaI and vitamin D was assessed with a radioimmunoassay kit.

Results

The distribution of genotype frequencies differed significantly between asthmatics and controls (FokI: P = 0.04; BsmI: P = 0.006; TaqI: P = 0.006). Haplotype analyses revealed a significant association between bAt and bat haplotypes and asthma (P = 0.00076, P = 0.016). When patients were stratified according to atopic status and stage of severity, no significant association was detected with VDR variants. No association was found between VDR SNPs and serum 25-hydroxyvitamin D levels.

Conclusion

Our study shows a relation between VDR gene polymorphisms and susceptibility to asthma in children.     

HLA-DQ遗传多态性与乙肝病毒感染结局相关

目的 探讨中国汉族人群人类白细胞抗原(HLA)-DQ基因单核苷酸多态性(rs9275572和rs9275319)与乙肝病毒感染结局的关系.方法 用TaqMan探针对纳入的921例样本进行HLA-DQrs9275572和rs9275319位点多态性的检测,921例血样本包括310例HBV相关慢性肝病者(CLD)、295例乙肝感染后自发清除者(SC)和316例健康对照者(HC).结果 1)Rs9275572 AG基因型有利于乙肝感染后病毒自发清除(OR 1.82,95％ CI 1.26～2.62;显性基因模型:OR 1.84,95％ CI 1.30～2.61).2)SNPrs9275319位点与乙肝易感性及感染后病毒的自发清除关系密切,携带rs9275319 C等位基因是一个保护因素(CLD vs HC:等位基因模型OR 0.49,95％ CI0.33 ～0.73,显性模型OR0.47,95％ CI0.31～0.72;CLD vs SC:等位基因模型OR 1.61,95％ CI 1.06～2.43,显性模型OR 1.57,95％口1.01 ～2.48).3)单体型T-G/T-A与乙肝易感性及感染后病毒自发清除相关.结论 HLA-DQ基因多态性与乙肝易感性及感染后病毒的自发清除密切相关.     

Association between interleukin-1 receptor antagonist gene and asthma-related traits in a German adult population

Background:  A recent study in German and Italian families associated variants in the interleukin-1 receptor antagonist (IL1RA) gene with asthma. The aim of the present study was to further investigate the role of single nucleotide polymorphisms (SNPs) in the IL1RA gene in the development of atopy and lifelong asthma in a population-based study.
Methods:  DNA samples from the German centres of the European Community Respiratory Health Survey were analysed for genetic variants in the IL1RA gene and the development of asthma, atopy and bronchial hyperreactivity.
Results:  Carriers of the rare G allele of SNP rs447713 had a significantly increased risk of developing asthma ( P  = 0.0013) and allergic sensitization ( P  = 0.0119). Carriers of the rare C allele of SNP rs3087271 had an increased risk of asthma ( P  = 0.0227) and high immunoglobulin E (IgE) levels ( P  = 0.0232). A haplotype built from eight SNPs in the IL1RA gene (A-C-A-G-A-C-G-A) was associated with a higher prevalence of asthma ( P  = 0.007) and high total IgE ( P  = 0.02). Bronchial hyperreactivity was positively associated with the haplotype A-C-G-G-A-C-G-C ( P  = 0.02) and negatively with the A-C-G-G-A-C-T-C ( P  = 0.03).
Conclusion:  A previously described association between IL1RA and asthma in families could be reproduced in a population-based sample. The genetic variants of IL1RA gene do not to seem to affect asthma alone, but to act as modulators of asthma-related traits as well, where different haplotypes drive the development of different phenotypes.     

SLC22A12基因第8外显子和第8内含子多态与中国汉族人原发性高尿酸血症关联研究

目的 研究原发性高尿酸血症患者SLC22AI2基因第8内含子和第8外显子单核苷酸多态(single nucleotide polymorphism,SNP)位点与原发性高尿酸血症遗传易感性的关系.方法 选择山东沿海地区原发性高尿酸血症患者215例,正常对照人群323名.提取基因组DNA,PCR扩增SLC22A12基因第8内含子和第8外显子,对PCR扩增产物进行测序.结果 序列分析发现:(1)SLC22AI2基因第8外显子存在T1309C单核苷酸多态,第8内含子存在-103A＞G单核苷酸多态,这2个多态位点完全连锁.(2)高尿酸血症组-103A＞G G等位基因频率和T1309C C等位基因频率明显高于正常对照组(均为51.9%vs.42.4%,P＜0.01);(3)高尿酸血症组GG+GA基因型频率和CC+CT基因型频率显著高于正常对照组(均为80.0%vs.69.0%,P＜0.01).(4)-103 A＞G和T1309C基因多态中,含有等位基因G的基因型GG+GA及含有等位基因C的基因型CC+CT均使高尿酸血症的发病危险性上升了1.79倍(OR=1.79,95%CI:1.19～2.70).结论 SLC22A12基因第8外显子T130gC及第8内含子-103A＞G SNP与原发性高尿酸血症密切相关.     

Association of single nucleotide polymorphisms in the IL-18 gene with sarcoidosis in a Japanese population

Interleukin-18 (IL-18) and interleukin-12 (IL-12) synergistically stimulate interferon-gamma (IFN-gamma) production from Th1 cells. The levels of serum IL-18 and IFN-gamma and bronchoalveolar lavage fluid IL-18 were elevated in patients with sarcoidosis. The polymorphisms of the IL-18 gene may play a possible role in expression regulation of the gene. We investigated the roles of the polymorphisms in the development of sarcoidosis. We examined two single nucleotide polymorphisms of the IL-18 gene in 119 patients with sarcoidosis and 130 healthy control subjects. Our results showed that the frequency of sarcoidosis patients with the CA genotype at position -607 was significantly higher than that with the AA genotype (OR = 2.200) and a significantly higher proportion of patients had the C allele at -607 compared with that of the controls (OR = 2.123). No significant differences were seen in the distribution of the genotypes or phenotype frequencies at position -137. There was no specific organ involvement associated with a certain genotype or phenotype. In IL-18 gene polymorphisms, the C allele at position -607 might be a genetic risk factor for sarcoidosis in this Japanese population.     

汉族人维生素D受体基因TruⅠ酶切位点多态性及其对BsmⅠ酶切位点多态性测定的影响

目的测定汉族人维生素D受体基因TruⅠ酶切位点多态性分布并探讨其对BsmⅠ酶切位点多态性分布测定的影响。方法收集80名健康汉族人外周静脉血标本,提取基因组DNA,用限制性片段多态性长度酶切法测定80名汉族人维生素D受体基因TruⅠ、BsmⅠ酶切位点多态性;换用常规引物再次测定上述标本BsmⅠ酶切位点多态性;分析维生素D受体基因TruⅠ、BsmⅠ酶切位点多态性及两次测定的BsmⅠ位点的一致性。结果测得TruⅠ基因型频率为TT68.7%,Tt26.3%,tt5.0%;同一PCR片段上测得BsmⅠ位点基因型频率为BB6.2%,Bb52.5%,bb41.3%,多态性分布均符合Hardy-Weinberg平衡;换用常规引物测定同批标本BsmⅠ位点多态性,基因型分布为BB20.0%,Bb26.2%,bb53.8%,不符合Hardy-Weinberg平衡（r=13.29,P〈0.01）。与第1次测定相比,有22个标本基因型由Bb型变成BB型或bb型,发生基因型丢失。结论汉族人VDR基因存在TruⅠ多态性,其多态性分布与其它种族不同;TruⅠ酶切位点多态性可引起BsmⅠ位点多态性测定时等位基因的丢失。     

ESR1基因单核苷酸多态性及单倍型与精神分裂症的关联研究

目的 探索雌激素受体1 (estrogen receptor 1,ESR1)基因rs2234693、rs9340799和rs3798759位点单核苷酸多念性(single nucleotide polymorphisms,SNPs)及其单倍型与精神分裂症(schizophrenia,SZ)发病之间的相关性.方法 应用聚合酶链反应-限制性片段长度多态性技术对333例SZ患者和315名正常对照rs2234693、rs9340799和rs3798759位点进行基因分型,应用x2检验对SZ组和对照组等位基因、基因型和单倍型频率进行分析.结果 rs2234693、rs9340799位点两组间基因型频率及等位基因分布差异均无统计学意义(P＞0.05).SZ组rs3798759位点GG基因型频率及G等位基因频率均高于健康对照组(P＜0.01).性别分层分析提示,女性SZ患者rs3798759位点TG、GG基因型频率及G等位基因频率均高于健康女性(P＜0.05).单倍型C-A-G和C-G-G在SZ组的分布频率高于对照组(P＜0.05).结论 rs3798759位点突变可能为女性精神分裂症发生的风险因子,C-A-G和C-G-G单倍型可能为精神分裂症的遗传风险单倍型.