CYP1A1基因多态性与急性淋巴细胞白血病的关系

目的　探讨CYP1A1基因多态性与急性淋巴细胞白血病 (ALL)遗传易感性的关系。方法　应用PCR -RFLP、ASA技术 ,分析 78例ALL患者和 112例健康人CYP1A1基因多态性 ,比较ALL患者与对照组间频率差异。结果　ALL组CYP1A1MspI基因多态位点 ,各等位基因和基因型频率与对照组比较有显著性差异 (P <0 .0 5 ) ,其中等位基因m2使患ALL的危险度提高了 1.5 4倍 ,m1m2、m2m2基因型使患ALL的危险度分别提高了 2 .2 7倍和 2 .77倍 ;ALL组CYP1A1Ile-Val各等位基因和基因型频率与对照组比较无显著性差异 (P >0 .0 5 )。结论　CYP1A1MspI基因多态可能与ALL的发生有关。     

单胺氧化酶A基因Fnu4HⅠ酶切位点多态性与帕金森病相关性研究

目的 探讨多巴胺代谢酶—单胺氧化酶A(monoamine oxidase A,MAO—A)基因Fnu4H Ⅰ酶切位点多态性与帕金森病(Parkinson‘s disease,PD)遗传易感性的关系。方法 应用聚合酶链反应—限制性片段长度多态性技术分析了MAO—A基因Fnu4H Ⅰ酶切位点多态性在PD患者与正常对照之间分布频率的差异。结果 PD组和对照组的G等位基因的频率分别为0．613和0．527(P＝0．039),TT基因型频率分别为0．303和0．415(P＝0．014),GG基因型频率分别为0．564和0．451(P＝0．021)。根据发病年龄分组后,表明这种差异主要存在于早发性PD和对照组之间,G等位基因在早发PD组和对照组中的频率分别为0．642和0．527(P＝0．029);GG基因型频率分别为0．585和0．451(P＝0．032);按性别分组后发现差异仅存在于男性PD和对照组之间,G等位基因的频率在男性PD组和对照组中分别为0．669和0．500(P＝0.005)。结论 MAO—A基因Fnu4H Ⅰ位点在对照组和PD患者之间的分布差异有显著性,G等位基因和GG基因型频率在PD组中较高,支持MAO—A基因多态性与PD相关的假说,而且与PD发病年龄和性别有关。     

神经源分化因子基因多态性与2型糖尿病的关联性研究

目的　探讨神经源分化因子 (neurogenic differentiation factor 1,Neuro D)基因多态性与 2型糖尿病发生的关联性。方法　运用错配聚合酶链反应 -限制性片段长度多态性方法检测了中国湖北地区汉族 32 4例 2型糖尿病 (其中以发病年龄 40岁为界 ,分为早发及晚发两组 )及 12 4名正常对照者 ,Neuro D基因第 45位密码子碱基变异 (GCC→ ACC)。结果　 Neuro D基因在所测人群中未发现有纯合变异者。在早发 2型糖尿病组 ,其 AT基因型频率为 2 6 .8% ,与正常对照组 (10 .5 % )及晚发 2型糖尿病组 (11.6 % )比较 ,差异有显著性 (分别为χ2 =7.85 ,P=0 .0 0 5 ;χ2 =8.81,P=0 .0 0 3) ;Thr45等位基因频率在早发 2型糖尿病组及正常对照组、晚发 2型糖尿病组分别为 13.4%、5 .2 %和 5 .8% ,差异亦有显著性 (χ2 =7.15 ,P=0 .0 0 8;χ2 =8.13,P=0 .0 0 4) ;晚发 2型糖尿病组与正常对照组比较 ,Ala45 Thr基因型频率 (11.6 % vs10 .5 % ,P>0 .0 5 )及等位基因频率 (5 .8% vs 5 .2 % ,P>0 .0 5 )差异不明显 ,Thr45等位基因与早发 2型糖尿病发生相关 (OR=2 .5 2 ,95 % CI:1.42～ 4.49) ;基因型为 AT型的 2型糖尿病患者其空腹血浆 C肽水平较 AA型患者低 ,差异有显著性 (P<0 .0 5 )。结论　 Neuro D基因多态性与早发 2型糖尿     

中国人NAD(P)H:醌氧化还原酶基因多态性与帕金森病遗传易感性的关系

目的　探讨依赖还原型辅酶 / 醌氧化还原酶 [NAD(P) H:quinone oxidoreductase,NQO1]c DNA6 0 9位点 C→ T多态性与帕金森病 (Parkinson'sdisease,PD)遗传易感性的关系。方法　用聚合酶链反应 -变性高效液相技术 (polymerase chain reaction- denaturing high performance liquid chromatog-raphy,PCR- DHPL C)分析了 NQO1基因c DNA6 0 9位点C→T多态性在 PD患者与正常对照之间分布频率的差异。结果　PD组和对照组的 TT基因型频率分别为 2 2 .6 %和 11.8% (P=0 .0 0 4 ) ,TT基因型使患 PD的危险度提高 2 .186倍 (P=0 .0 0 5 ) ;根据发病年龄分组后 ,这种差异主要存在于晚发性 PD和对照组之间 ,TT基因型使患 PD的危险度提高 2 .6 2 7倍 (P=0 .0 0 1)。等位基因在总体 PD组、早发 PD组、晚发 PD组和对照组中的频率分布差异无显著性。结论　NQO1基因c DNA6 0 9位点C→T多态性在对照组和PD患者之间的分布差异有显著性 ,突变基因型 (TT基因型 )频率在 PD组中较高 ,研究结果支持 NQO1基因多态性与 PD相关的假说 ,而且与 PD发病年龄有关。     

血管紧张素Ⅱ的Ⅰ型受体基因多态性和胰岛素抵抗与2型糖尿病冠心病的关系

目的　探讨血管紧张素Ⅱ的Ⅰ型受体 (typeⅠangiotensinⅡreceptor,AT1R)基因A116 6C多态性和胰岛素抵抗 (insulinresistance ,IR)与 2型糖尿病 (type 2diabetesmellitus,DM2 )冠心病的关系。方法应用PCR -RFLP法 ,对 6 2例DM2合并冠心病 (CHD)患者 ,4 9例DM2 非合并CHD患者和 10 1例正常对照组人群的AT1R基因A116 6C多态性进行检测 ;以 -log(空腹血糖×空腹胰岛素 )作为IR指标。结果　DM2 合并CHD组与DM2 非合并组比较 :AT1R基因型频率的差异无显著性 (P >0 .0 5 ) ;合并CHD组C等位基因频率显著升高 (0 .0 81vs0 .0 2 1) P <0 .0 5 ;OR =4 .2 1,95 %CI :1.0 0— 17.6 0。DM2 合并CHD组与非合并CHD组相比 ,ISI(- 2 .0 1vs- 1.77)显著升高 (P <0 .0 1)。AT1R基因多态性各基因型之间IR指标无显著性差异 (P >0 .0 5 )。结论　AT1R基因A116 6C多态性参与中国汉族人群DM 2CHD的发病 ;AT1R基因A116 6C多态性与IR无相关性 ;AT1R基因 116 6C等位基因携带者不是通过IR的影响而参与DM2 CHD的发病。     

HLA-DRB1等位基因与中国北方汉族多发性肌炎/皮肌炎的相关性

目的　探讨HLA DRB1等位基因与中国北方汉族多发性肌炎 (PM) 皮肌炎 (DM)的相关性。方法　采用聚合酶链反应 序列特异性引物 (PCR SSP)技术 ,检测中国北方汉族PM DM患者的HLA DRB1等位基因。结果　与 16 8例正常对照组比较 ,在 5 2例PM DM患者中HLA DRB1 0 40x和DRB1 12 0x等位基因频率明显增高 ,且差异有非常显著性 ( χ2 =2 9.80 ,RR =6 .6 1,Pc <0 .0 1;χ2 =2 2 .2 2 ,RR =5 .82 ,Pc<0 .0 1) ;DRB1 0 70x的基因频率也明显高于正常对照组的基因频率 ,且差异有显著性 ( χ2 =10 .6 8,RR =4.48,Pc<0 .0 5 )。 38例DM患者中HLA DRB1 0 40x和DRB1 12 0x等位基因频率明显增高 ,差异有非常显著性 ( χ2 =2 6 .33,Pc<0 .0 1;χ2 =2 0 .82 ,Pc<0 .0 1) ;DRB1 0 70x的基因频率也明显高于正常对照组的基因频率 ,且差异有显著性 ( χ2 =9.6 2 ,Pc<0 .0 5 )。 14例PM患者HLA DRB1 0 40x基因频率也明显增高 ,但经P值校正后无统计学意义 ( χ2 =6 .12 ,Pc>0 .0 5 )。 10例伴间质性肺炎型患者HLA DRB1 12 0x等位基因频率较正常对照组的基因频率明显增高 ,且差异有非常显著性 ( χ2 =12 .5 6 ,Pc<0 .0 1)。结论　PM DM与HLA DRB1 0 40x、 0 70x和 12 0x有显著性相关 ,为揭示PM DM的发病机制中免疫遗传学机制所起的     

parkin基因S/N167多态性与散发性帕金森病关联研究

目的 探讨parkin基因S／N167多态性与散发性帕金森病（Parkinson's disease,PD) 的遗传易感性的关系。方法 以120例用发性PD患者为研究对象，120名正常人作为对照。采用聚合酶链反应扩增所需DNA片段，用限制性内切酶酶切技术测定所研究对象的基因型和等位基因。将PD组按性别，起病年龄分组；正常人按性别分组，比较各组间基因型及等位基因频率的差异。结果 PD组与正常组S／N167多态性等位基因频率差异无显著性（x^2=0.75,P=0.39)；早发性PD组S／N167多态性等位基因频率显著高于正常对照组x^2=5.80,p=0.016,OR=1.69)；早发性PD组较晚发性PD组S／N167多态性等位基因频率显著增高（ x^2=10.58,P=0.001)。结论 parkin基因S／N167多态性可能是早发性PD的危险因素，其患PD的风险性较正常组增高1．69倍。     

α1—抗糜蛋白酶信号肽基因与阿尔茨海默病相关性初步探讨

目的　探讨阿尔茨海默病 (Alzheimer’sdisease ,AD)患者中的α1-抗糜蛋白酶基因多态性及其与AD的相关性 .方法　利用聚合酶链式反应 -限制性片段长度多态性 (PCR -RFLP)技术对 48例AD患者及 89例对照者的α1-抗糜蛋白酶信号肽基因进行分型 ,进而进行AD与α1-抗糜蛋白酶信号肽基因多态性的相关分析 .结果　①AD病人α1-抗糜蛋白酶基因中 ,基因型A/T占 2 7.1% ,明显低于对照组的 5 1.7% (p <0 .0 1,RR =0 .3 5 5 ) ,T/T占 60 .4% ,明显高于对照组的 3 7.1% (p <0 .0 1,RR =2 .5 76) ,A/A占 12 .5 % ,与对照组 11.2 %无明显差异 (p >0 .0 5 ,RR =1.0 86) .②AD病人中α1-抗糜蛋白酶信号肽基因等位基因A的频率为 2 6.0 %、相对危险率 (RR)为 0 .5 94,T的频率为 74.0 %、RR为 1.683与对照组的A为 3 7.1%、T为 62 .9%差异无显著性意义 (p >0 .0 5 ) .结论　AD病人中α1-抗糜蛋白酶信号肽基因基因型T/T(AACT T/T)频率明显高于正常人 ,与AD存在正相关 ;而AACT A/T频率则明显低于正常人 ,与AD存在负相关     

多巴胺D2受体TaqIA多态性与海洛因依赖行为相关性

目的 :探讨多巴胺 (DA)受体D2 亚型基因TaqIA多态性与海洛因依赖者行为之间的相关性。方法 :应用PCR -RFLP法对 6 6例海洛因依赖病人与 132例正常人D2 R基因的TaqIA多态性特征进行对照研究。以A型行为问卷 (TABPQ) [1] 测评海洛因依赖者的行为类型 ,与其TaqIA多态性特征进行相关分析。结果 :海洛因依赖组与正常对照组DRD2 基因的TaqIA多态性基因型及等位基因频率有显著性差异 (前者携带A1等位基因的频率为 0 6 1,后者携带A1等位基因的频率为 0 31,P <0 0 5 ) ,携带A1等位基因更易形成海洛因依赖者 (比值比OR :3 47,P <0 0 5 )。各种行为类型的海洛因依赖者之间 ,基因型 (TaqIA多态性 )无显著性差异 (P >0 0 5 )。结论 :多巴胺D2 受体基因的TaqIA多态性与海洛因依赖相关连。多巴胺D2 受体基因TaqIA多态性与海洛因依赖者成瘾性的形成可能相关。这种基因位点特征可能与其他候选基因及环境因素共同作用 ,影响着海洛因依赖者的行为     

单胺氧化酶B和NAD(P)H醌氧化还原酶基因多态性与帕金森病的关系

目的 探讨参与多巴胺代谢的单胺氧化酶B（monoamine oxidase B,MAO-B)内含子13A／G多态性,NAD（P）H醌氧化还原酶基因[NAD(P)H:quinone oxidoreductase,NQO1]cDNA609C/T多态性与帕金森病（Parkinson's disease,PD)遗传易感性的关系。方法 应用等位基因特异PCR扩增分析MAO－B基因的多态性,用PCR－RFLP分析NQO1基因多态性。结果 MAO－BA／G等位基因频率、各基因型频率PD组与对照组差异无显著性。NQO1基因T等位基因频率PD组（52％）高于正常对照组（43％）带T碱基的NQO1基因型频率PD组显著高于正常对照组（P＜0．05）,其患PD的相对危险度（odds ratio,OR)为3．8。在带有A等位基因MAO－B基因型的个体,带有T碱基因的T等位基因是PD的危险因素。MAO－B基因的A等位基因型与NQO1基因的T等位基因的基因型可相互协同,增加PD发生的风险。     

Association between endometriosis and N-acetyl transferase 2 polymorphisms in a UK population.

The relationship between endometriosis and polymorphisms in the N-acetyl transferase 2 (NAT 2) gene was investigated in a UK population, as this gene has been previously implicated in the aetiology of the disease. Point mutations in the gene result in the variant alleles NAT 2 *5, *6 and *7 from the wild-type NAT 2 *4 allele. Homozygotes for the NAT 2 *4 wild type allele are fast NAT acetylators, while heterozygotes with one wild-type allele and a variant NAT 2 *5, *6 or *7 allele have reduced enzyme activity, and individuals with two variant alleles are slow acetylators. The NAT 2 *4/*6 genotype was significantly more common among affected women (35.2%) than population controls (8.1%; P = 0.0001) or unaffected women (4.2%; P = 0.02). Significantly more affected women (57.4%) were fast acetylators than were population controls (32.3%; P < 0.01) or unaffected women (33.3%; P < 0.05). These data suggest that altered NAT 2 enzyme activity may be a predisposition factor in endometriosis, or that NAT 2 alleles may be in linkage disequilibrium with a susceptibility allele in the same chromosomal region.     

A2M基因多态性与帕金森病和特发性震颤的关联

目的探讨α2-巨球蛋白基因（α2-macmglobulin gene，A2M）第24外显子1000G／A及第18外显子5’端剪接点5个碱基插入／缺失（insertion／deletion，IZD）多态与中国北方帕金森病（Parkinson’sdisease，PD）和特发性震颤（essential tremor，ET）的关联。方法应用聚合酶链反应-限制性片段长度多态性方法，对87例PD、73例ET和100名健康对照者A2MG／A和I／D两个位点的基因型和等位基因分布频率进行检测。结果（1）A2M基因G／A位点基因型和等位基因分布，在PD与ET、对照组间差异有统计学意义（P〈0．05），PD组的G等位基因和GA基因型明显高于ET、对照组（P〈0．05）；而ET与对照组间相比，差异无统计学意义（P〉0．05）。（2）A2M基因IZD位点基因型和等位基因分布，在PD、ET、对照组间差异无统计学意义（P〉0．05）。结论（1）G／A位点多态与PD的发病有关联，G／A位点多态与ET无关。（2）I/D位点多态与中国北方PD、ET无关。     

Distribution of HLA-A, B alleles and polymorphisms of TAP and LMP genes in Korean patients with atopic dermatitis

BACKGROUND: Atopic dermatitis has been seen to result from multifactorial inheritance, with interaction between genetic and environmental factors. The genetic association may differ according to the ethnic backgrounds. OBJECTIVE: The purpose of this study was to investigate the genetic factors in Korean atopic dermatitis patients by studying the human leucocyte antigen (HLA) class I association and polymorphisms of transporters associated with antigen presentation (TAP) and low-molecular-weight polypeptide (LMP) genes. METHODS: HLA-A and B genotyping was performed in 53 atopic dermatitis patients and 184 healthy controls using the standard microlymphocytotoxicity technique. TAP1, TAP2, LMP2, and LMP7 gene polymorphisms were anaylzed using the polymerase chain reaction (PCR)-single strand conformation polymorphism (SSCP), PCR-amplification refractory mutation system (ARMS), and PCR-restriction fragment length polymorphism (RFLP). RESULTS: Allele frequency of HLA-A24 was significantly increased in patients with atopic dermatitis compared to controls (P < 0.05). HLA-B alleles showed no differences in distribution between patients and controls. Genotype, phenotype, and allele frequencies of TAP1 gene also revealed no differences in distribution between patients and controls. Analysis of TAP2 gene polymorphisms showed increased frequencies of the TAP2*C allele and TAP2*A/TAP2*C genotype in atopic dermatitis patients compared to controls (P < 0.05). Distribution of LMP2 and LMP7 gene polymorphisms was similar for patients and controls. CONCLUSION: This study demonstrates an association of atopic dermatitis with HLA-A24 and TAP2*C alleles in Korean patients. Discrepancy with the previous reports might be related to different patient characteristics and ethnic variations.     

白细胞介素10基因-627位点多态性与早发冠状动脉粥样硬化性心脏病的关系

目的探讨白细胞介素10（interleukin 10，IL10）基因-627位点多态性与早发性冠状动脉粥样硬化性心脏病（coronary heart disease，CHD）和血清IL10水平的关系。方法应用聚合酶链反应-限制性片段长度多态性办法，检测CHD患者163例和正常对照者112名IL10基因-627位点多态性，采用ELISA法检测血清IL10。结果IL10基因-627位点基因型和等位基因频率在CHD组和对照组之间差异无统计学意义，X^2值分别为1．9324，1．5703，P〉0．05。按性别分层分析，男性组X^2值分别为1．2708，0．8595，P〉0．05；女。女性组X^2值分别为0．8254，0．7127，P〉0．05。血清IL10在AA型、AC型和CC型之间差异有统计学意义，P〈0．05，但在CHD组和对照组之间差异无统计学意义，P〉0．05。结论IL10基因-627位点多态性与中国人汉族人冠病的易感性无显著关联，但可能影响IL10基因的转录活性。     

成都地区妊娠期肝内胆汁淤积症与人类白细胞抗原-DQA1的相关性研究

目的探讨妊娠期肝内胆汁淤积症（intrahepatic cholestasis of pregnancy, ICP）与人类白细胞抗原-DQA1（human leukocyte antigen-DQA1, HLA-DQA1）位点等位基因多态性的关系。方法采用聚合酶链反应-序列特异性引物法（polymerase chain reaction with sequence-specific primer, PCR-SSP）对成都地区45例ICP孕妇、18个ICP家庭、45名正常妊娠孕妇及18个正常对照家庭进行HLA-DQA1等位基因分型分析。结果ICP组孕妇HLA-DQA1＊0301等位基因频率明显低于正常对照组孕妇，除此之外，HLA-DQA1其余各等位基因的基因频率在正常对照组和ICP组之间差异无统计学意义。两组夫妇及母胎HLA-DQA1等位基因共享比较亦无统计学意义。结论成都地区人群中HLA-DQA1各等位基因与ICP的发生无明显相关性；HLA-DQA1＊0301等位基因可能是ICP的遗传保护基因，对疾病的发生可能有拮抗作用。     

Vitamin D receptor gene polymorphism and its association with Parkinson's disease in Chinese Han population

Vitamin D plays an important role in neurodegenerative disorders as a crucial neuro-immunomodulator, and accumulating data have provided evidence for that vitamin D receptor (VDR) gene is a candidate gene for susceptibility to Parkinson's disease (PD). In this study, we performed a case-control study to demonstrate whether the risk for the development of onset of sporadic PD might be influenced by VDR gene polymorphisms in a Chinese cohort. Two hundred and sixty PD patients and 282 matched-healthy controls were genotyped for two representative single nucleotide polymorphisms (SNPs) in VDR gene (FokI C/T and BsmI G/A) by polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) analysis in. Results from our study revealed that FokI C allele carriers were likely to associate with an increased risk of PD (P = 0.004) as well as early-onset PD (EOPD) (P = 0.010). Moreover, the frequency of FokI C allele was significantly increased in PD group and late-onset PD (LOPD) group relative to the control groups respectively (P = 0.023 and P = 0.033, respectively). For BsmI polymorphisms, no significant difference in genotype or allele distribution was found between PD patients and the controls, as well as gender- and age-related differences between PD patients and the controls subgroup. This study demonstrated a possible association between the VDR FokI T/C polymorphism and PD, indicating that VDR polymorphisms may well change genetic susceptibility to sporadic PD in a Han Chinese population.     

Sulfotransferase 1A2*2 is a risk factor for early-onset breast cancer

The estrogen-signaling pathway plays an important role in the pathophysiology of breast cancer, and the sulfotransferase 1A (SULT1A) family has been found to be both downstream targets of tamoxifen and a risk factor of breast cancer. We have used PCR-RFLP and direct sequencing methods to determine SULT1A2 polymorphisms in 230 Taiwanese breast cancer patients. The results showed that the frequencies of SULT1A2*1 and SULT1A2*2 occurring were 94.8% and 5.2%, respectively. No SULT1A2*3 allele was found in these patients. In comparison with the frequency of healthy controls (96.0% and 4.0% for SULT1A2*1 and SULT1A2*2, respectively), the allelic frequencies of SULT1A2 polymorphisms in these patients were not statistically significant (p=0.398). However, the SULT1A2*2 allele seems to influence the age of onset among early-onset breast cancer patients (p=0.021, OR=2.74, 95%CI=1.13-6.65).     

Interleukin-10 promoter polymorphisms in Chinese patients with Parkinson's disease

Interleukin-10 (IL-10), an important anti-inflammatory cytokine, may influence the risk for the development of onset of sparadic Parkinson's disease (PD) in the inflammatory process. In this study, two DNA polymorphisms at IL-10 gene promoter (-819 T/C and -592 A/C) were examined in 355 sporadic PD patients and 200 healthy controls in Han Chinese Population. For both polymorphisms, no significant difference in genotype or allele distribution was found between PD patients and the controls. For -819 T/C polymorphisms, there was significant difference in genotype distribution between EOPD (EOPD, <50 years of age) patients and each healthy-matched control subgroup (P=0.011), as well as between female PD patients and each healthy-matched control subgroup (P=0.024), For -592 A/C polymorphisms, there were no significant gender- and age-related differences in genotype distribution between PD patients and the controls subgroup. Results from our study revealed that the IL-10 promoter (-819 and -592) polymorphism is not a risk factor of sporadic Parkinson's disease, but the IL-10 promoter -819 polymorphism is a risk factor of EOPD and female PD patients in Han Chinese population.     

Association of Polymorphism in Cytochrome P450 2D6 and N-Acetyltransferase-2 with Parkinson’s Disease

The present case-control study was carried out to investigate the association of polymorphism in cytochrome P450 2D6 (CYP2D6) and N-acteyltransferase-2 (NAT2), that are involved in the metabolism and detoxification of chemicals causing Parkinson disease (PD) like symptoms, with PD. Our data demonstrated increased frequency of CYP2D6*2 (1749G/C and 2938C/T), CYP2D6*4 (1934G/A) and CYP2D6*10A (188C/T) polymorphisms in PD cases when compared to the controls. Statistical analysis revealed the significant association of CYP2D6*4 (1934G/A) and CYP2D6*10A (188C/T) polymorphism with PD. Likewise, increased frequency of NAT2*7 polymorphism that leads to the slow acetylator phenotype was observed in PD patients with more than fivefold increased risk (OR: 5.55; 95%CI: 0.56–54). No change was observed in the frequency of NAT*5 or NAT*6 alleles in the cases. Further, cases carrying combination of heterozygous genotypes of CYP2D6*4 or CYP2D6*10A(188C > T) and NAT2*5 were found to be at significantly higher risk for PD demonstrating the importance of gene-gene interactions in determining susceptibility to PD.     

Parkin基因新的多态位点IVS3-20 T→C增加早发性帕金森病的发病风险

目的 确定parkin基因第3内含子区新的多态位点IVS3-20 T→C多态与帕金森病(Parkinson’s disease，PD)的相关性。尤其是该多态与PD发病年龄的关系。方法 经PCR扩增后。用变性高效液相色谱和DNA自动测序等方法分析了312例PD患者和236名正常对照parkin基因IVS3—20 T→C多态性位点分布频率的差异。结果 总体分析未发现C／C纯合型。PD组T／C基因型频率和C等位基因频率与对照组相比有明显升高，但差异无显著性。将PD组按年龄分层后。45岁以下PD患者IVS3—20 T→C多态T／C基因型频率(7．07%)明显高于正常对照组(2．12%)。OR=3．52，95%CI为0．97～13．13(P=0．0263)。C等位基因频率(3．90%)也明显高于正常对照组(1．06％)。OR=3．42。95%CI为0．96～12．57(P=0．0276)．而45岁以上PD组与正常对照组相比差异无显著性。年龄分层后的趋势分析显示parkin基因IVS3-20 T／C多态性相对危险度与PD发病年龄间存在负相关联系．结论 发现了parkin基因IVS3-20 T→C多态位点，并提示IVS3-20 T→C多态位点可能是中国人散发性早发PD的一个危险因素。