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1.
目的:探讨RAC1基因上4个单核苷酸多态性(SNPs)对其mRNA转录和表达的影响,为进一步研究RAC1基因多态性与相关疾病及药物反应性之间的关系做铺垫。方法:实时荧光TaqMan-MGB探针等位基因分型技术被用来测定242例湖北地区健康志愿者的RAC1基因上4个SNPs位点的基因型,同时采用Trizol法提取总mRNA并用RTQ-PCR进行定量分析。结果:本研究所选4个SNPs位点均符合Hardy-Weinberg平衡,且各SNP位点相互独立。4个SNPs的等位基因、基因型分布频率在不同性别间没有差异(P>0.05)。RAC1基因转录的mRNA的表达量与性别和年龄不相关(P>0.05)。携带rs702482-TT基因型者的RAC1 mRNA比携带其他两种基因型的人RAC1 mRNA表达量低,且差异有统计学意义(P<0.05)。结论:RAC1基因转录的mRNA的表达量与性别和年龄无关(P>0.05),但受rs702482-TT基因型的影响而表达下调。  相似文献   

2.
目的 探讨CYP1A1基因Exon7位点和Msp1位点多态性与宫颈癌遗传易感性的关系.方法 280例老年官颈癌患者为实验组,280例健康体检者为对照组,用CR-RELP技术和ASAPCR技术分别检测两组人群Msp1位点和Exon7位点的多态性.结果 两组在CYP1A1Ⅱe/Val位点分布上差异有统计学意义(P<0.05);且携带Ⅱe/Val基因型的个体发生官颈癌的危险是携带Ⅱe/Ⅱe基因型个体的2.473倍.而两组的Mspl基因型多态性分布频率及OR值均无统计学差异(P>0.05).结论 CYP1A1 Exon7基因多态性是发生宫颈癌的危险因素,有可能成为宫颈癌遗传易感标记物.Mspl位点多态性与官颈癌易感性可能无关.  相似文献   

3.
用薄层聚丙烯酰胺凝胶等电聚焦结合特异酶染色方法研究畲族磷酸葡萄糖变位酶1(PGM1)的遗传多态性,共调查126人。结果显示,PGM1位点的各等位基因频率分别为PGM11A0.5357、180.1627、2A0.1587和2B0.1429,各等位基因频率都达到多态水平。未发现PGM11B1B纯合表型,也未发现罕见表型。  相似文献   

4.
氯氮平是非典型抗精神分裂的代表药物,在治疗精神分裂疾病中起到重要作用,临床实践发现,不同个体对氯氮平的反应有较大差异,研究表明,遗传因素是导致氯氮平疗效产生个体差异的重要原因之一。本文就氯氮平的基因遗传多态性研究进展进行综述。  相似文献   

5.
DNA修复基因XPD单核苷酸多态性与肺癌遗传易感性   总被引:2,自引:0,他引:2  
目的探讨XPD基因单核苷酸多态性与肺癌遗传易感性的关系。方法以聚合酶链反应-限制性片段长度多态性方法分析肺癌患者(n=114)和按性别、年龄频数配比的对照者(n=114)XPD基因Asp312Asn和Lys751Gln位点的多态性,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XPD312Asp/Asp基因型者比较,携带至少1个312Asn等位基因的个体罹患肺癌的风险增加1.55倍(95%CI1.02~2.39)。而与携带XPD751Lys/Lys基因型者比较,携带至少1个751Gln等位基因的个体罹患肺癌的风险并没有显著增加(校正OR=0.96;95%CI0.53~1.72)。交互作用分析显示,携带至少1个312Asn等位基因并吸烟者肺癌风险增加5.14倍(95%CI1.82~9.16),其中重度吸烟者肺癌风险增加高达7.32倍(95%CI2.17~21.18)。结论DNA修复基因XPD Asp312Asn多态性可能与山东地区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。  相似文献   

6.
ATP结合的盒转运子A1(ATP Banding cassette Transporter al,ABCA1)促进细胞内游离胆固醇和磷脂的流出,在胆固醇逆转运(RCT)和HDL生成的起始步骤起重要作用;同时ABCA1与动脉粥样硬化(AS)和冠心病的发生密切相关。ABCA1基因的单核苷酸多态性(SNP)广泛存在于普通人群及冠心病人群中,不同人种、不同SNP位点对ABCA1功能影响不同,同一SNP在不同人种其作用也不同,ABCAISNP与血浆HDL—C水平、炎症细胞因子及冠心病发生密切相关。因此,ABCAISNP可能是影响血浆HDL—C水平及冠心病发生的重要因素。  相似文献   

7.
刘昭前  程泽能 《中南药学》2003,1(4):197-199
内源性化合物和异质物主要通过被动扩散和转运体的转运而进出细胞膜。近年来,多种转运体基因和蛋白质已经被鉴定。ABC(ATP binding cassette)超家族是一种由多种转运体组成的、在机体内广泛表达的大家族。在人体,已有48种ABC转运体被鉴定。人类ABC转运体由7种亚家族组成,即ABC1(12个成员)、MDR/TAP(11个成员)、MRP/CFTR(12个成员)、GCN20(3个成员)、  相似文献   

8.
9.
中风相关基因遗传多态性研究进展   总被引:1,自引:0,他引:1  
候选基因遗传多态性与疾病发生、发展的关系是目前医学研究的热点 ,对中风相关基因多态性在人群的分布情况的研究将有助于深入认识发病机制及提高防治能力。该文综述了目前与中风相关的亚甲基四氢叶酸还原酶、血管紧张素转换酶、血管紧张素原、ApoE、、一氧化氮合成酶等的基因遗传多态性研究进展  相似文献   

10.
目的 探讨IL-1B T-31C和C-511T基因多态性与宫颈高危人乳头瘤病毒(HPV)持续感染遗传易感性的关系.方法 采用聚合酶链式反应和限制性片段长度多态性(PCR-RFLP)检测中国江苏部分地区高危 H PV持续感染(A组 ,223例)和感染自我清除的汉族女性(B组 ,186例)IL-1B T-31C、C-511T基因型分布.结果 两组IL-1B T-31C和C-511T 位点各基因型分布无统计学差异(P>0 .05).IL-1B T-31C和C-511T位点的基因频率与HPV持续感染遗传易感性均无明显相关性(P>0 .05).结论 在中国江苏汉族女性人群中 ,IL-1B T-31C和 C-511T 基因多态性可能与高危HPV持续感染遗传易感性无关.  相似文献   

11.
《Drug metabolism reviews》2012,44(1):169-184
Human N-acetyltransferase 1 (NAT1) alleles are characterized by one or more single nucleotide polymorphisms (SNPs) associated with rapid and slow acetylation phenotypes. NAT1 both activates and deactivates arylamine drugs and carcinogens, and NAT1 polymorphisms are associated with increased frequencies of many cancers and birth defects. The recently resolved human NAT1 crystal structure was used to evaluate SNPs resulting in the protein substitutions R64W, V149I, R187Q, M205V, S214A, D251V, E261K, and I263V. The analysis enhances knowledge of NAT1 structure-function relationships, important for understanding associations of NAT1 SNPs with genetic predisposition to cancer, birth defects, and other diseases.  相似文献   

12.
邹焰  李宏彬  陆祥  陈伟 《贵州医药》2007,31(2):110-113
目的 分析水族人群DNA修复基因XRCC1 C26304T、G27466A与G28152A单核苷酸多态性及其等位基因频率与组合分布特征.方法 获取自然人群个体水族197例血白细胞基因组DNA,利用PCR扩增限制性酶切法(PCR-RFLP)检测XRCC1 C26304T、G27466A与G28152ASNPs.结果 XRCC1 C26304T SNPs基因型分布CC、CT、TT分别为57.4%、33.5%、9.1%,C、T等位基因频率分别为74.1%、25.9%.XRCC1 G27466A SNPs基因型分布GG、GA、AA分别为79.7%、18.9%、1.5%,G、A等位基因频率分别为89.1%、10.9%.XRCC1 G28152 A SNPs基因型分布GG、GA、AA分别为49.2%、43.7%、7.1%,G、A等住基因频率分别为71.1%、28.9%.XRCC1基因在C26304T和G28152A两位点的SNPs组合基因型频率较高的为CC GA 53例(26.9%);C26304T和G274 66A两位点的SNPs组合基因型频率较高的为CC GG 84例(42.6%);G28152A和G27466 A两位点的SNPs组合基因型频率较高的为GA GG 73例(37.1%).结论 本研究揭示了水族人群XRCC1基因3位点的单核苷酸多态性、基因型及其组合分布特征,为进一步研究该基因SNPs与其生理功能和疾病的关系提供基础资料.  相似文献   

13.
魏丹芸  张洪  彭锐  张英 《中国药师》2015,(12):2152-2156
摘 要 目的: 综述ABCC2基因单核苷酸多态性对药物临床应用的影响。方法: 通过查阅国内外已发表见刊的相关文献,对ABCC2基因单核苷酸突变与药物临床应用的相关性加以归纳总结。结果: ABCC2转运蛋白在许多内源性化合物和外源性化合物的跨膜转运中起到重要作用。大量研究证明了ABCC2的单核苷酸突变可能影响其表达水平或功能活性,进而影响底物药物或有毒物质的吸收、分布和排泄,但这些研究结果多数存在一定的局限性和争议。结论:ABCC2单核苷酸多态性对某些药物的临床应用有一定的影响,对指导临床用药和评估药物疗效有重要的参考价值,但目前并不能作为唯一的指标。  相似文献   

14.
Hexavalent chromium [Cr(VI)] is one of the most common environmental carcinogens, which is associated with DNA damage, genetic instability and increase the risk of cancer development. However, the mechanisms of genetic damage induced by Cr(VI) remains to be thoroughly illustrated. A molecular epidemiological study was conducted on 120 chromate exposed workers and 97 controls. Results indicated that,the rs12432907 of XRCC3 carrying T allele, the rs144848 of BRCA2 with C allele and the rs1805800 of NBS1 with genotype(TT) of individuals were associated with lower genetic damage, while the rs2295152 of XRCC3 carrying T allele, the rs13312986 (CC and CT genotypes) and the rs2697679 of NBS1 with A allele were associated with higher genetic damage in workers exposed to chromate. The interaction of chromate exposure with rs2295152 of XRCC3 had a significant effect on micronuclei frequency (MNF). The gene polymorphisms in homologous recombination repair pathway could modulate chromate-induced genetic damage.  相似文献   

15.
目的分析江苏汉族人群多药耐药基因-1(MDR1)的单核甘酸多态(12外显子1236C→T突变、21外显子2677G→T/A突变、26外显子3435C→T突变)及其构成的单倍型分布。方法通过多重单碱基延伸反应(SNaPshotSNP分型技术)对江苏地区170名健康儿童的MDR1C1236T、G2677T/A、C3435T的SNP位点进行基因分型,统计各基因型频率。UNPHASED软件对MDR1的SNPs(C1236T-G2677T/A-C3435T)进行单倍型分析。结果在170例儿童中,等位基因1236T、2677T、2677A、3435T频率分别为63.5%、37.4%、17.0%和35.0%。基因型频率分布符合Hardy-Weinberg平衡(HWE),差异无统计学意义(P〉0.05)。MDR1的1236、2677、3435三个位点间(C1236T-G2677T/A-C3435T)存在连锁不平衡性,以TTT(31.8%)、TGC(25.3%)、CGC(17.7%)和CAC(16.2%)四种单倍型为主。结论江苏地区汉族人群MDR1的单核甘酸多态及单倍型分布具有自己的特点。在临床应用相关药物时,进行基因型及单倍型检测,将有助于指导临床个体化用药。  相似文献   

16.
目的探讨S1RTl基因多态性与肺癌对以铂类为基础的化疗敏感性的关系。方法选取338名肺癌患者(其中184名对化疗耐药和154名对化疗敏感)为研究对象,所有患者均接受以铂类(顺铂、卡铂)为基础的化疗。分析其SIRTl的所有单核苷酸多态性,最后筛选出4个tagSNPs进行基因分型。OR和CI用来评估SIRTl基因多态性与肺癌患者化疗效果的相关性。结果在〉60岁的肺癌患者中,rs3758391的基因多态性与铂类化疗疗效显著相关(OR=0.38,P=0.049)。rs3740051、rsl2778366的遗传多态性与铂类化疗疗效之间无显著相关性。结论SIRTlrs3758391基因多态性可以显著影响肺癌患者铂类化疗的敏感性,SIRTl可能作为肺癌铂类化疗疗效评估的标志物。  相似文献   

17.

Background

Glucocorticoids play essential roles in the treatment of childhood acute lymphoblastic leukaemia (ALL); however, treatment with these agents can result in severe side-effects. This study, the first of its kind in a Saudi population, investigates associations of ABCB1 gene polymorphisms (pharmacodynamics and pharmacokinetic) with the development of toxicity and side effects (glucose abnormality, liver toxicity and infection) in a small population of Saudi children with ALL.

Methods

Three single nucleotide polymorphisms (SNPs) of the ABCB1 gene (rs 3213619 T129C, rs 2032582 G2677T and rs1045642 C3435T) were analysed in 70 Saudi children with ALL and 60 control subjects. Participants were treated according to the ALL 2000 study protocol. Toxicities were assessed and associations with genotypes were evaluated according to Common Toxicity Criteria (NCI-CTC).

Results

Significant associations were observed among carriers and the mutated genotype C3435T (ABCB1), which had an incidence of infection (p?=?0.05). Although no correlations were found between liver toxicity and glucose abnormalities for patients carrying ABCB1 SNPs, risk factors for liver toxicity were elevated by a factor of three for patients carrying the SNP G2677T, OR 3.00 (1.034–8.702). The risk factor of glucose abnormality toxicity for the patients carring T129C were increased three times OR 3.06 (0.486–19.198).

Conclusions

In terms of infection incidence, polymorphism C3435T may contribute to potential life-threatening infections during paediatric ALL therapy, through glucocorticoid usage.  相似文献   

18.
This study investigated the effects of atorvastatin on ABCB1 and ABCC1 mRNA expression on peripheral blood mononuclear cells (PBMC) and their relationship with gene polymorphisms and lowering-cholesterol response. One hundred and thirty-six individuals with hypercholesterolemia were selected and treated with atorvastatin (10 mg/day/4 weeks). Blood samples were collected for serum lipids and apolipoproteins measurements and DNA and RNA extraction. ABCB1 (C3435T and G2677T/A) and ABCC1 (G2012T) gene polymorphisms were identified by polymerase chain reaction-restriction (PCR)-RFLP and mRNA expression was measured in peripheral blood mononuclear cells by singleplex real-time PCR. ABCB1 polymorphisms were associated with risk for coronary artery disease (CAD) (p<0.05). After atorvastatin treatment, both ABCB1 and ABCC1 genes showed 50% reduction of the mRNA expression (p<0.05). Reduction of ABCB1 expression was associated with ABCB1 G2677T/A polymorphism (p=0.039). Basal ABCB1 mRNA in the lower quartile (<0.024) was associated with lower reduction rate of serum low-density lipoprotein (LDL) cholesterol (33.4+/-12.4%) and apolipoprotein B (apoB) (17.0+/-31.3%) when compared with the higher quartile (>0.085: LDL-c=40.3+/-14.3%; apoB=32.5+/-10.7%; p<0.05). ABCB1 substrates or inhibitors did not affect the baseline expression, while ABCB1 inhibitors reversed the effects of atorvastatin on both ABCB1 and ABCC1 transporters. In conclusion, ABCB1 and ABCC1 mRNA levels in PBMC are modulated by atorvastatin and ABCB1 G2677T/A polymorphism and ABCB1 baseline expression is related to differences in serum LDL cholesterol and apoB in response to atorvastatin.  相似文献   

19.
单核苷酸多态性检测方法的研究进展   总被引:1,自引:0,他引:1  
单核苷酸多态性(single nucleotide polymorphism,SNP)作为第3代遗传标记,具有数量多、分布广泛等特点,已成为人类后基因组时代的主要研究内容之一,广泛应用于疾病相关分析、群体遗传学及药物研究等领域,因此建立高度自动化和高通量的SNP检测分析技术十分重要。该文介绍了几种SNP检测技术,特别是生物传感器用于检测SNP的原理,并对高通量的SNP检测技术进行了展望。  相似文献   

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