11个携带线粒体tRNASer(UCN) G7444A突变的中国汉族非综合征型耳聋家系分析评估

目的：通过对11个携带线粒体tRNASer(UCN) G7444A突变的中国汉族非综合征型耳聋家系进行临床和分子遗传学特征等分析评估,探讨线粒体tRNASer(UCN) G7444A突变在母系遗传非综合征型耳聋发生发展中的作用。方法：PCR扩增2 650例中国汉族非综合征型耳聋样本的线粒体12S rRNA、线粒体tRNASer(UCN)基因以及GJB2基因。对11个携带线粒体tRNASer(UCN) G7444A突变的中国汉族非综合征型耳聋家系进行听力学检测、耳聋相关热点基因突变检测以及家系资料等综合分析。结果：在2 650例中国汉族非综合征型耳聋患者中,14例携带线粒体tRNASer(UCN) G7444A突变,突变率为0.53%。在这11个携带线粒体tRNASer(UCN) G7444A突变的家系中,同时携带线粒体tRNASer(UCN) G7444A突变和线粒体12S rRNA A1555G、12S rRNA C1494T或GJB2 c.235delC的家系分别为3、1和2个。临床资料分析表明,这11个中国汉族非综合征型耳聋家系母系成员在听力损失严重程度、发病年龄以及耳聋外显率方面存在较大差异。同时携带线粒体tRNASer(UCN) G7444A突变和线粒体12S rRNA A1555G、C1494T或GJB2 c.235delC突变家系的耳聋平均外显率分别为29.4%、42.9%和19.0%。前两者的外显率明显高于只携带线粒体tRNASer(UCN) G7444A突变家系的耳聋平均外显率（为14.0%）。结论：线粒体tRNASer(UCN) G7444A突变可能与线粒体12S rRNA A1555G和C1494T原发突变存在协同作用,共同影响非综合征型耳聋的表型。     

线粒体DNA3160-3755区域基因突变与2型糖尿病的关系

目的研究线粒体DNA3160-3755区域基因在延边地区2型糖尿病（T2DM）患者中的突变情况,探讨该区域线粒体基因突变与2型糖尿病的关系。方法应用聚合酶链反应-限制性片段长度多态性（polymorphismchainreaction-restrictionfragmentlengthpolymorphism,PCR-RFLP）技术和直接测序法对延边地区人群108例正常健康体检者、328例T2DM患者（其中2例合并耳聋）,进行线粒体DNA3160-3755区域基因突变筛查。结果线粒体DNA3316G-A在糖尿病组和正常对照组中的突变率分别为3．7％和3．8％。两组间差异无统计学意义（P〉0．05）;3394T→C在糖尿病组和正常对照组中的突变率分别为7．3％和1．9％,两组间差异有统计学意义（P〈0．05）;在糖尿病组及正常对照组中均未检测到线粒体DNA3243A→G、3593T→C和3714A→G突变。结论线粒体DNA3316G→A突变与延边地区T2DM的发生无关;线粒体DNA3,394T→C突变与延边地区T2DM的发生有关;线粒体DNA3423A→G,3593T→C,3714A→G突变在延边地区T2DM中的发生率为0,提示上述位点基因突变率极低。     

Detection of thiopurine s-methyltransferase mutations by template directed determinator in incorporation with fluorescence polarization （TDI-FP）

Objective: To develop a new method for the detection of TPMT gene mutations and determine the frequencies of four TPMT alleles, TPMT^*1,^*3A,^*3B and ^*3C in a healthy Chinese population. Methods:A TDI-FP assay system was set up in out lab. To evaluate this system, 220 healthy individuals were analyzed for the polymorphic sites at positions 460 (G→A)and 719 (A→G)of the TPMP gene using our new TDI FP method. Results:Three TPMP *3C(G^460→G^719) heterozygotes were identified, TPMP ^*3A and TPMP ^*3B were not found. All mutations were confirmed by conventional DNA sequencing analysis. Conclusion:TDI-FP method has proven to be very efficient as a rapid and accurate approach for TPMP genotyping. TPMP ^*3C was the only polymorphism identified in this clinical samples we have registered.     

线粒体DNA 3243、3316、3394位点突变与精神分裂症相关分析

目的分析线粒体tRNALeu(UUR)基因3243位点及ND1基因3316、3394位点突变对精神分裂症(SZ)发病的影响。方法采用PCR扩增、限制性内切酶消化、琼脂糖凝胶电泳分型检测、DNA测序等方法,对随机抽取的无亲缘关系的250例患者(SZ组)和292例对照组的外周血mtDNA进行3243、3316和3394位点的突变检测。结果在SZ组中发现8例3316G/A突变,对照组中3例,两组相比差异无统计学意义(P=0.138)。在SZ组中发现15例3394T/C突变,对照组中有4例,两组相比差异有统计学意义(P=0.007)。在精神分裂症患者组和对照组中均未发现3243A/G突变。结论 mtDNA3394T/C突变可能与SZ发生有一定关系,mtDNA 3243A/G、3316G/A突变可能与SZ发生无关。     

糖尿病线粒体ND1基因3316 G→A突变的功能研究

目的 探讨线粒体ND1基因3316 G→A突变对线粒体生物学功能的影响及其在糖尿病发病中的作用.方法 利用真核表达载体pcDNA3.1B和大肠杆菌DH5α构建野生型和线粒体DNA的ND1基因3316 G→A突变型重组子pcDNA3.1B-ND1;设计特异性siRNA序列干扰Hela细胞内源性线粒体DNA表达,使其内源性ND1基因沉默;经脂质体转入野生型和突变型重组子pcDNA3.1B-ND1,使其在Hela细胞内表达.通过RT-PCR、十二烷基硫酸钠-聚丙烯酰胺凝胶电泳和荧光显微镜,从mRNA水平→蛋白质水平→线粒体膜电势位检测干扰效果,以筛选有效干扰siRNA序列.结果 线粒体ND11和线粒体ND12 siRNA序列均具有一定的干扰效果,后者效果明显优于前者;转入3316 G→A突变型重组子pcDNA3.1B-ND1的Hela细胞表达的线粒体蛋白低于野生型.结论 线粒体DNA的ND1基因正常表达对维持正常的呼吸链功能和细胞增殖至关重要,携有3316 G→A突变基因的糖尿病的发病与线粒体蛋白表达下降有关.     

A Mitochondrial DNA A8701G Mutation Associated with Maternally Inherited Hypertension and Dilated Cardiomyopathy in a Chinese Pedigree of a Consanguineous Marriage

Background:

Cardiovascular diseases, including dilated cardiomyopathy (DCM) and hypertension, are the leading cause of death worldwide. The role of mitochondrial DNA (mtDNA) in the pathogenesis of these diseases has not been completely clarified. In this study, we evaluate whether A8701G mutation is associated with maternally inherited hypertension and DCM in a Chinese pedigree of a consanguineous marriage.

Methods:

Fourteen subjects in a three-generation Han Chinese family with hypertension and DCM, in which consanguineous marriage was present in the parental generation, were interviewed. We divided all the family members into case (7 maternal members) and control group (7 nonmaternal members) for comparison. Clinical evaluations and sequence analysis of mtDNA were obtained from all participants. Frequency differences between maternal and nonmaternal members were tested to locate the disease-associated mutations.

Results:

The majority of the family members presented with a maternal inheritance of hypertension and DCM. Sequence analysis of mtDNA in this pedigree identified eight mtDNA mutations. Among the mutations identified, there was only one significant mutation: A8701G (P = 0.005), which is a homoplasmic mitochondrial missense mutation in all the matrilineal relatives. There was no clear evidence for any synergistic effects between A8701G and other mutations.

Conclusions:

A8701G mutation may act as an inherited risk factor for the matrilineal transmission of hypertension and DCM in conjunction with genetic disorders caused by consanguineous marriage.     

A novel mitochondrial tRNA gene mutation in a chinese family with dilated cardiomyopathy and sensorineural deafness

Objective： To determine whether a mutation of mitochondrial DNA induces familial dilated cardiomyopathy in Chinese families with cardiomyopathy, and analyzed the correlation between the genotype and phenotype. Methods： Affected members in three Chinese families of the familial dilated cardiomyopathy underwent clinical evaluation and DNA analysis. Polymerase chain reaction and direct DNA sequencing were used to screen for mitochondrial DNA mutation. The type of mtDNA variations and clinical situation were analysed on the patients with mitochondrial DNA mutation. Results： The mitochondrial A3434G mutation was identified in one of the three families,the 3434 th nucleotide A was replaced by G, which led to change of amino acid. No mutations were identified in the clinically unaffected members of the family and all members of the other two families. Conclusion： This study indicates that the mitochondrial A3434G mutation maybe related with familial dilated cardiomyopathy and deafness.     

11个携带线粒体tRNASer（UCN）G7444A突变的中国汉族非综合征型耳聋家系分析评估

目的：通过对11个携带线粒体tRNASer（UCN）G7444A突变的中国汉族非综合征型耳聋家系进行临床和分子遗传学特征等分析评估,探讨线粒体tRNASer（UCN）G7444A突变在母系遗传非综合征型耳聋发生发展中的作用。方法：PCR扩增2650例中国汉族非综合征型耳聋样本的线粒体12SrRNA、线粒体tRNASer（UCN）基因以及GJB2基因。对11个携带线粒体tRNASer（UCN）G7444A突变的中国汉族非综合征型耳聋家系进行听力学检测、耳聋相关热点基因突变检测以及家系资料等综合分析。结果：在2650例中国汉族非综合征型耳聋患者中,14例携带线粒体tRNASer（UCN）G7444A突变,突变率为0.53%。在这11个携带线粒体tRNASer（UCN）G7444A突变的家系中,同时携带线粒体tRNASer（UCN）G7444A突变和线粒体12SrRNAA1555G、12SrRNAC1494T或GJB2c.235delC的家系分别为3、1和2个。临床资料分析表明,这11个中国汉族非综合征型耳聋家系母系成员在听力损失严重程度、发病年龄以及耳聋外显率方面存在较大差异。同时携带线粒体tRNASer（UCN）G7444A突变和线粒体12SrRNAA1555G、C1494T或GJB2c.235delC突变家系的耳聋平均外显率分别为29.4%、42.9%和19.0%。前两者的外显率明显高于只携带线粒体tRNASer（UCN）G7444A突变家系的耳聋平均外显率（为14.0%）。结论：线粒体tRNASer（UCN）G7444A突变可能与线粒体12SrRNAA1555G和C1494T原发突变存在协同作用,共同影响非综合征型耳聋的表型。     

海南省汉族人群中6种β-地中海贫血基因突变的研究

目的:研究海南省汉族人群的β-地中海贫血的分子基础。方法:应用等位基因特异性聚合酶链反应(PCR)技术筛查海南省汉族人群中的6种β-地中海贫血突变类型:CD41-42(-CTTT)缺失突变、IVSII654(C→T)突变、CD17(A→T)无义突变、TATA盒nt-28(A→G)突变、CD71-72(+A)移码突变和CD26(G→A)突变。结果:在675人中发现17例β-地中海贫血携带者,携带率为2.52%,其中CD41-42(-CTTT)缺失突变杂合子9例(携带率为1.33%);IVSII654(C→T)突变杂合子5例(携带率为0.74%);TATA盒nt-28(A→G)突变杂合子2例(携带率为0.30%);CD71-72(+A)移码突变杂合子1例(携带率为0.15%);未检出CD17(A→T)无义突变和CD26(G→A)突变2种突变类型。结论:海南汉族人群是β-地中海贫血的高发群体,其基因突变类型主要以CD41-42(-CTTT)缺失突变、IVSII654(C→T)突变、TATA盒nt-28(A→G)突变和CD71-72(+A)移码突变4种突变类型常见。     

汉族人群药物代谢酶基因多态性位点基因型分布频率的研究

目的 了解汉族人群7种主要药物代谢酶基因14个多态性位点基因型的分布频率及其特征.方法 收集1382名汉族人外周血样品,常规提取基因组DNA.用PCR-限制性内切酶片段长度多态性方法检测细胞色素P450酶(CYP450)的CYP3A4 * 1B、CYP3A5 * 3、苯醌氧化还原酶1(NQO1)的C609T(NQO1_(C609T))、髓过氧化物酶(MPO)的G463A(MPO_(G463A))、5,10-亚甲基四氢叶酸还原酶(MTHFR)的C677T(MTHFR_(C677T))、A1298C(MTHFR_(A1298C))、N-乙酰基转移酶2(NAT2)的NAT2* 5A_(C481T)、NAT2 * 6A_(G590A)、NAT2 * 7A_(G857A)和巯基嘌呤-S-甲基转移酶(TPMT)的TPMT * 3B_(G460A)、TPMT * 3C_(A719G)多态性位点基因型,用多重PCR方法检测谷胱甘肽硫转移酶(GST)的GSTM1、GSTT1基因型,用等位基因特异性PCR(AS-PCR)检测,TPMT * 2_(G238C)基因型.结果 野生、杂合变异和纯合变异基因型频率CYP3A4 * 1B分别为99.8%、0.2%和0,CYP3A5 * 3为8.4%、34.3%和57.3%;NQO1_(C609T)为28.7%、49.7%和21.6%;MPO_(G463)A为75.0%、23.2%和1.8%;MTHFR_(C677T)为25.9%、44.9%和29.2%,MTHFR_(A1298C)为67.3%、30.4%和2.3%;TPMT * 3C_(A719G)为96.8%、3.2%和0.表达型和缺失型基因型频率GSTM1分别为36.1%和63.9%,GSTT1分别为54.4%和45.6%.NAT2*4/*4、*4/*5、*4/*6、*4/*7、*5/*5、*5/*6、*5/*7、*6/*6、*6/*7和*7/*7基因型频率分别为34.5%、4.3%、24.3%、18.2%、0.1%、1.8%、1.5%、5.0%、7.6%和2.6%,NAT2*4、*5、*6和*7等位基因频率分别为57.9%、3.9%、21.8%和16.3%,快乙酰化和慢乙酰化基因表型频率分别为81.4%和18.6%.TPMT*2_(G238C)和TPMT*3B_(G460A)野生基因型频率均为100%.结论 药物代谢酶基因常见的遗传多态性在中国汉族人群中的分布及其频率与白种人和黑种人存在明显差异,与亚洲其他黄种人也存在一定的差异.     

Mitochondrial D-loop variation in leber hereditary neuropathy patients harboring primary G11778A, G3460A, T14484C mutations: J and W haplogroups as high-risk factors

BACKGROUND: Leber hereditary optic neuropathy (LHON) is a maternally inherited form of retinal ganglion cell degeneration leading to optic atrophy in young adults. It is caused by three primary point mutations including G11778A, G3460A, and T14484C in the mitochondrial genome. These three mutations account for the majority of LHON cases and affect genes that encode for different subunits of mitochondrial complex I. Mitochondrial DNA (mtDNA) has a non-coding region at the displacement loop (D-loop) that contains two hypervariable segments (HVS-I and HVS-II) with high polymorphism. METHODS: To investigate any possible association between LHON primary mutations and mtDNA haplogroups (hg), the nucleotide sequence of the HVS-I region of mtDNA was determined in 30 unrelated Iranian patients with LHON harboring one of the primary mutations and 100 normal controls with the same ethnicity. DNA was extracted from the peripheral blood after having obtained informed consent. The nucleotide sequence of HVS-I (np 16,024-16,383) was directly determined. RESULTS: Our analysis revealed a relatively high proportion of haplogroup J in LHON patients (53.3%) compared to normal controls (20%). In addition, a slightly significant increase of normal controls of haplogroup L has been confirmed (14% in normal controls vs. 0% in LHON patients at p = 0.03), whereas other haplogroups did not show contribution to LHON contingency. CONCLUSIONS: The analysis presented here provides evidence that there is an association between G11778A and G3460A with haplogroup J (including J1 and J2) and W, respectively. Therefore, we hypothesize that mtDNA haplogroups J (J1 and J2) and W might act as predisposing haplotypes, increasing penetrance of LHON disease.     

海南汉族、黎族人葡萄糖-6-磷酸脱氢酶缺乏症的基因突变

目的:阐明海南汉族、黎族人群中葡萄糖-6-磷酸脱氢酶缺乏症的分子基础。方法:用聚合酶链反应、限制性内切酶消化筛查了1388G→A、1376G→T、1360C→T、1024C→T、592C→T、517T→C、493A→G、487G→A、392G→T和95A→G突变;用单链构象多态性分析筛查其它突变;用核苷酸顺序分析鉴定具有SSCP异常区带样品的突变。结果:在59例汉族G6PD缺乏症患者中,发现1388G→A14例(23.7%)、1376G→T19例(32.2%)、871G→A3例(5.1%)、835A→T1例(1.7%)、517T→C1例(1.7%)、392G→T3例(5.1%)、95A→G4例(6.8%);在32例黎族G6PD缺乏症患者中,发现1388G→A6例(18.8%)、1376G→T18例(56.2%)、871G→A3例(9.4%)、95A→G2例(6.3%);结论:海南汉族、黎族人群中具有共同的常见G6PD基因突变型,提示一些G6PD基因突变是中国南方人群的遗传特征。     

河南汉族人群线粒体DNA(CA)n重复子的多态性及法医学应用

目的:探讨河南汉族人群线粒体(mt)DNA 514～523位置(CA)n重复子的遗传多态性及应用.方法:应用PCR扩增、聚丙烯酰胺凝胶电泳分离、银染技术,对河南汉族214例无关个体血样进行mtDNA(CA)n重复子分型.并对5例腐败肌肉及5例角化组织用Chelex-100、二硫苏糖醇(DTT)联合Chelex-100法和PCR缓冲液法分型技术效果进行比较.结果:河南汉族214例无关个体中检出4种等位基因,重复5～8次,基因差异度0.5013.腐败肌肉及角化组织用DTT联合Chelex-100法和PCR缓冲液法均分型成功.结论:mtDNA(CA)n重复子多态性在河南汉族人群具有一定的法医学应用价值,尤其对于腐败肌肉及角化组织.     

中国人腓骨肌萎缩症线粒体融合蛋白2基因突变分析

目的 分析线粒体融合蛋白2(MFN2)基因在中国人腓骨肌萎缩症的突变情况,建立快速、有效和经济的基因诊断方法 .方法 应用变性高效液相色谱(DHPLC)结合DNA直接测序的方法 ,对9个常染色体显性遗传的CMT2先证者和26个散发CMT2病例共35例患者进行MFN2基因编码区17个外显子及其侧翼区的突变检测.结果 在35例腓骨肌萎缩症患者中共检测到3种MFN2基因序列变异:c.281G→A,c.395G→A和c.408A→T,其中c.395G→A(C132T)为首次报道的致病突变,c.281G→A(R94Q)为已知致病热点突变,c.408A→T(V136V)为单核苷酸多态.DHPLC突变检测的敏感性和特异性为100%.结论 首次在国内应用DHPLC结合DNA直接测序对MFN2基因进行突变检测,发现2个致病突变和1个单核苷酸多态.DHPLC结合DNA直接测序法可准确有效地用于大规模MFN2基因突变筛查.     

非综合征型耳聋GJB2基因和mtDNA 12SrRNA A1555G位点的突变分析

目的:分析南京聋校散发性耳聋患者GJB2基因突变率和线粒体DNA(mtDNA)12SrRNA A1555G基因突变率.方法:收集聋校学生135名和健康对照人群162名外周血样本,PCR扩增GJB2和mtDNA 12SrRNA基因,通过限制性内切酶酶切鉴定突变热点,对PCR产物直接测序进行突变确定.结果:对GJB2检测结果显示:散发性耳聋患者样本中发现9种碱基改变(V27I、E114G、I203T V37I、176-191del16、235delC、299-300delAT、T123N和504insGCAA),其中235delC为主要突变方式,携带率为27.41%,其中纯合突变18例,杂合突变19例;162例正常对照中发现了15种碱基改变,其中4种为常见多态.散发聋135例和正常对照162例共计297例样本中未发现有mtDNA 12SrRNA A1555G位点突变存在;结论:GJB2基因突变是引起散发性非综合征耳聋患者听力损失发生的重要原因,不同人种GJB2基因的突变热点存在差异,235delC是GJB2基因在中国人中的主要致病突变位点;GJB2基因在人群中存在较多类型的突变和较多形式的多态性;在散发性耳聋中mtDNA 12SrRNA A1555G位点的突变率明显低于全国平均水平.     

CYP1B1 432C/G基因多态性与子宫内膜异位症易感性的相关研究

目的探讨中国南方汉族妇女CYP1B1基因第3外显子432C/G(rs1056836)位点单核苷酸多态性(single nucleotide polymorphism,SNP)与子宫内膜异位症(endometriosis,Ems)遗传易感性的相关性.方法收集经手术证实的432例Ems患者和499例对照人群外周血,采用荧光定量PCR为基础的高分辨率熔解曲线分析(high resolution melting,HRM)技术检测CYP1B1 432C/G基因SNP.结果病例组和对照组妇女CYP1B1 432C/G位点CC、CG、GG基因型频率分别为80.6%、18.8%、0.7%以及77.6%、21.0%、1.4%,2组的基因频率分布差异无统计学意义(P>0.376);C和G等位基因分布为89.8%、10.1%以及88.1%、11.9%,2组差异无统计学意义(P>0.376).结论中国南方汉族妇女CYP1B1 432C/G位点SNP与Ems遗传易感性无明显相关性.     

海南文昌汉族人群中两种葡萄糖-6-磷酸脱氢酶基因突变的研究

目的:分析海南文昌人群中葡萄糖-6-磷酸脱氢酶基因1376G→T、95A→G突变。方法:应用硝基四氮唑蓝定量法进行G6PD缺乏症的筛查,用等位基因特异PCR检测1376G→T、95A→G突变。结果:在358位海南文昌汉族人中,发现G6PD缺乏症患者20例,其中9例患者有1376G→T突变,3例患者有95A→G突变。结论:1376G→T、95A→G突变是文昌人群中常见的突变。     

2 型糖尿病患者线粒体常见基因突变PCR检测的局限性

目的:研究北京地区汉族人群中线粒体DNA(m itochondrial DNA,m tDNA)多位点突变频率与2型糖尿病之间的相关性。方法:采用直接PCR、PCR-限制性片段长度多态性(restriction fragm ent length polymorph ism,RFLP)、PCR-时相温度梯度凝胶电泳(temporal temperature grad ient gel electrophoresis,TTGE)法筛查m tDNA 4977片段缺失、线粒体tRNALeu(UUR)A3243G突变和m tDNA T14577C突变。结果:在250例2型糖尿病患者及142例健康对照外周血基因组总DNA中,未发现m tDNA 4977缺失、线粒体tRNALeu(UUR)A3243G突变及m tDNA T14577C突变。结论:m tDNA 4977缺失、线粒体tRNALeu(UUR)A3243G突变及m tDNA T14577C突变在外周血中没有检出,采用常规PCR法检测2型糖尿病患者外周血线粒体DNA突变具有较大的局限性。     

线粒体DNA3316、3394等4个突变位点与2型糖尿病的关系研究

目的:探讨DNA tRNA Leu(UUR)基因及ND-1基因3316 G/A、3394 T/C等4个突变位点与2型糖尿病的关系。方法:对236例海南地区2型糖尿病患者和252例健康对照者进行空腹血糖测定并采用聚合酶链式反应—限制性核酸内切酶片段长度多态性(PCR-RFLP)的分析方法进行mtDNA的3243、3316、3394、和3593共4个位点进行突变筛选,并采用DNA测序方法确证。结果:实验组空腹血糖(9.37±3.01)mmol/L与健康对照组(4.96±0.76)mmol/L差异有统计学意义(P<0.05);实验组检出3316(G→A)突变8例,3394(T→C)突变3例;健康对照组未发现上述突变;突变检测结果与测序一致。两组间3316(G→A)突变率差异有统计学意义(P<0.05)。结论:线粒体DNAtRNALeu(UUR)基因及ND-1基因3316、3394位点的基因突变,尤其是3316位点(G→A)突变可能与某些核基因或环境因素协同促进了2型糖尿病的发生。     

应用等位基因特异性PCR检测胆固醇酯转运蛋白基因突变

目的:建立检测胆固醇酯转运蛋白(cholesterol ester transfer protein,CETP)基因6种常见突变的等位基因特异性PCR技术。方法:应用针对CETP基因TaqIB(G→A)、I405V(A→G)、D442G(A→G)、R451Q(G→A)、A373P(G→C)和I14A(G→A)这6种常见的突变位点设计的等位基因特异性PCR技术,对海南汉、黎族人群中CETP基因突变类型进行了检测,同时对经上述等位基因特异性PCR检测的样本进行序列测定。结果:在海南汉、黎族人群中,TaqIB(G→A)突变位点可检测出GG、GA、AA3种基因型,I405V(A→G)突变位点可检测出AA、AG、GG3种基因型,D442G(A→G)突变位点可检测出AA、AG2种基因型,但在海南汉、黎族人群中未检测到R451Q(G→A)、A373P(G→C)和I14A(G→A)3种突变类型,用等位基因特异性PCR鉴定的CETP基因突变的基因分型结果与序列测定结果完全符合。结论:等位基因特异性PCR技术操作简便,重复性和稳定性好,可作为鉴定CETP基因突变类型的可行方法。