Parkin基因多态性与帕金森病遗传易患性关系的研究

目的探讨Parkin基因S/N167和V/L380位点多态性与帕金森病遗传易患性的关系。方法以100例原发性帕金森病患者(其中40例为早发帕金森病患者)和100例健康体格检查者为研究对象。提取基因组DNA,采用聚合酶链反应方法扩增Parkin基因外显子4和外显子10,然后用内切酶AlwnI和Bsp1286I进行酶切,采用限制性酶切片段长度多态性的方法分析Parkin基因两个多态位点S/N167和V/L380等位基因与基因型频率分布差异。结果早发帕金森病患者S/N167多态位点等位基因A和含A基因型频率分布明显高于对照组(χ2=6.011,5.883;均P<0.05);帕金森病组和早发帕金森病组与对照组受试者的V/L380多态性等位基因和基因型频率分布相比,组间差异无统计学意义(χ2=0.884,1.023;均P>0.05)。结论Parkin基因S/N167多态性与帕金森病遗传易患性有关。     

Parkin基因R/W366及V/L380多态性与散发性帕金森病

目的　探讨Parkin基因V/L380及R/W36 6多态性与散发性帕金森病 (PD)的遗传易感性之间的关系。方法　以 12 0例散发性PD患者为研究对象 ,12 0名正常人作为对照。采用聚合酶链式反应 (PCR)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。结果　PD组R/W36 6多态性等位基因频率显著低于对照组 (连续校正χ2 =4 0 76 ,P <0 0 5 ) ;而V/L380多态性与女性散发性PD的遗传易感性相关联 (χ2 =4 4 5 ,P =0 0 3,OR =2 4 9) ,与发病年龄不相关。结论　Parkin基因R/W36 6和V/L380多态性可能与散发性PD的遗传易感性相关。     

帕金森病患者parkin基因多态性位点的研究

目的 观察汉族帕金森病(PD)患者中parkin基因多态性位点等位基因频率，探讨parkin基因多态性位点与PD发病的关系。方法 PD患者组及对照组各70例。以提取基因组DNA为模板，扩增parkin基因的外显子4、外显子10，然后行酶切与聚丙烯酰胺电泳，观察S／N167、R／W366、V/L380多态性位点等位基因频率。结果 PD患者组与对照组间三个多态性位点等位基因频率均无明显差异。结论 parkin基因S／N167、R／W366、V/L380多态性位点与汉族PD患者的发病无明显相关性。     

Parkin 基因多态性与散发性帕金森病关系的研究

目的探讨Parkin基因S/N 167多态性与散发性帕金森病(PD)的遗传易感性之间的关系.方法以120例散发性PD患者为研究对象,分为早发性PD组和晚发性PD组,120名正常人作为对照.采用聚合酶链式反应(PCR)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.比较各组间基因型及等位基因频率的差异.结果 PD组与对照组S/N 167多态性等位基因频率无显著性差异(P>0.05);早发性PD组S/N 167多态性等位基因频率显著高于对照组和晚发性PD组(均P<0.05).结论Parkin基因S/N 167多态性可能是早发性PD的危险因素,其患PD的危险性较对照组增高1.69倍.     

新疆维吾尔族、汉族帕金森病患者α-突触核蛋白SNCA基因多态性与临床症状的关系

目的探讨新疆维吾尔族、汉族帕金森病(PD)患者α-突触核蛋白SNCA基因多态性与临床症状的关系。方法应用PCR-限制性片段长度多态性分析法对新疆地区的90例维吾尔族和135例汉族PD患者进行SNCA基因rs3822086位点多态性分析。采集相关临床资料;采用H-Y分期法判断PD严重程度;采用统一PD评定量表(UPDRS)、日常生活能力问卷(ADL)、MMSE和神经精神问卷(NPI)进行评分。比较SNCA基因rs3822086位点不同基因型PD患者间临床症状的差异。结果基因检测结果显示,SNCA基因rs3822086位点C/T基因型111例,T/T基因型61例,C/C基因型53例;不同基因型PD患者间年龄、性别、民族及病程的差异均无统计学意义。不同基因型PD患者间H-Y分期的差异无统计学意义(P=0.237);PD严重程度的差异无统计学意义(P=0.068);首发症状的差异无统计学意义(P=0.746);UPDRSⅡ评分的差异无统计学意义(P=0.598);UPDRSⅢ评分的差异无统计学意义(P=0.815);UPDRSⅣ评分的差异无统计学意义(P=0.096);ADL评分的差异无统计学意义(P=0.464);MMSE评分的差异无统计学意义(P=0.475)。SNCA基因rs3822086位点T/T基因型PD患者NPI评分明显高于C/C基因型PD患者(P0.05)。结论新疆维吾尔族、汉族PD患者SNCA基因T/T基因型在神经精神症状方面的风险要高于C/C基因型,其他临床症状与SNCA基因多态性无关。     

新疆地区维吾尔族、汉族单胺氧化酶B基因多态性与帕金森病的相关性研究

目的探讨中国新疆地区维吾尔族、汉族人群多巴胺代谢酶-单胺氧化酶B(MAO-B)基因内含子13 G/A多态性与帕金森病(PD)遗传易感性的关系,以及PD患者基因型与临床特点的关系。方法研究对象为中国新疆地区241例PD患者(PD组),其中维吾尔族95例(维吾尔族PD组)、汉族146例(汉族PD组);另选择247名健康对照者(对照组),其中维吾尔族104例、汉族143例。收集并分析PD患者临床资料;采用聚合酶链反应-限制性片段长度多态性分析法(PCR-RLFP)进行MAO-B基因多态性分析,研究基因型和等位基因频率分布情况。结果①PD组与对照组MAO-B基因G/A基因型及等位基因频率差异无统计学意义。②维吾尔族PD组和汉族PD组与对照组的基因型及等位基因频率差异无统计学意义。③男性PD组和女性PD组与相同性别对照组的基因型及等位基因频率分布差异无统计学意义。④发病年龄≤70岁PD患者与对照组基因型频率、等位基因频率差异无统计学意义;>70岁的PD患者与对照组基因型频率、等位基因频率差异有统计学意义。⑤新疆地区维吾尔族、汉族PD患者的3种基因型的临床特点差异无统计学意义。结论MAO-B基因的AA基因型与A等位基因频率增高是发病年龄>70岁新疆维吾尔族和汉族PD患者的危险因素。PD患者MAO-B基因3种基因型的临床特点无差别。     

PINK1基因T313M多态性与新疆维吾尔族帕金森病的关系研究

目的探讨PINK1基因第4外显子T313M的多态性与新疆维吾尔族(维族)帕金森病(PD)的关系。方法对175例维族原发性PD患者(PD组)及163例维族健康体检者(对照组)提取基因组DNA,采用PCR扩增所需PINK1基因第4外显子T313M基因片段,用限制性内切酶酶切技术测定其基因型和等位基因,再进行测序分析验证。结果 PD组PINK1基因T313M的T/T基因型频率为2.9%,C/C基因型频率为97.1%,T等位基因频率为2.9%,C等位基因频率为97.1%;对照组PINK1基因T313M的T/T基因型频率为1.2%,C/C基因型频率为98.8%,T等位基因频率为1.2%,C等位基因频率为98.8%。两组间PINK1基因T313M多态性的比较差异无统计学意义(P0.05)。结论 PINK1基因第4外显子T313M多态性与新疆维族PD患者的遗传易感性无关。     

帕金森病患者PINK1 LRRK2基因单核苷酸多态性分析

目的探讨PINK1基因rs45530340位点及LRRK2基因rs1491942位点单核苷酸多态性(single nucleotide polymorphism,SNP)与淮海地区汉族人群晚发散发性帕金森病(Parkinson’s disease,PD)的相关性。方法收集152例晚发散发性PD患者和160例年龄和性别相匹配的健康对照者,入组者均来自淮海地区汉族人群。提取外周血全基因组DNA,应用聚合酶链式反应(polymerase chain reaction,PCR)技术扩增包含多态位点的目的基因片段,通过琼脂糖凝胶电泳(AGE)检测PCR产物。对PCR产物分别用DNA限制性内切酶NlalV和SmlI进行酶切,用聚丙烯酰胺凝胶电泳(PAGE)、硝酸银染色检测酶切产物,采用聚合酶链式反应-限制性片段长度多态性(restriction fragment length polymorphism,RFLP)技术分析基因型,计算所有研究对象两个SNP位点的基因型频率和等位基因频率。结果 (1)PINK1基因rs45530340位点基因型和等位基因在晚发散发性PD组和正常对照组中的分布无统计学差异(基因型:χ2=1.572,P=0.456;等位基因:χ2=1.318,P=0.251)。(2)LRRK2基因rs1491942位点基因型和等位基因在晚发散发性PD组与正常对照组中的分布差异有统计学意义(基因型:χ2=6.802,P=0.033;等位基因C:χ2=7.448,P=0.006,OR=1.571,95%CI=1.135~2.176)。结论 (1)PINK1基因rs45530340多态位点可能不是淮海地区汉族人群晚发散发性PD患者的危险因素。(2)LRRK2基因rs1491942多态位点C等位基因可能是淮海地区汉族人群晚发散发性PD患者的危险因素。     

Omi/Htra2基因1195G/A多态性与帕金森病的相关性研究

目的 探讨中国汉族人群Omi/Htra2基因编码区1195G/A 位点的单核苷酸多态性(SNP)与帕金森病(PD)发病的关系.方法 采用聚合酶链反应-限制性酶切片段长度多态性(PCR-RFLP)技术,检测56例PD患者和109例健康人的Omi/Htra2基因编码区1195G/A位点多态性的基因型及等位基因频率.结果 56例PD病例中Omi/Htra2基因1195G/G基因型55例,G/A杂合子1例;对照组中109例全部为G/G基因型.结论 中国汉族人群Omi/Htra2基因编码区1195G/A杂合子可能是PD的患病因素.     

帕金森病(Parkin)基因突变多态性与定向手术疗效的相关性研究

目的通过研究帕金森病Parkin基因4、6、7号外显子突变的多态性与微电极导向的立体定向手术疗效的相关性,探讨Parkin基因突变在PD发病机制中的作用,同时为临床定向手术探索一种新的适应证。方法通过聚合酶链式反应(PCR)、基因测序技术及TDI-FP技术,对250例行微电极导向立体定向手术的原发性PD患者进行Parkin基因4、6及7号外显子突变检测,并对所有PD患者术前及术后1周的UPDRS评分进行比较,观察具有Parkin基因突变和不具有Parkin基因突变的PD和患者的手术疗效。250名正常健康人作为基础实验部分的阴性对照。结果共发现具有Parkin基因突变(包括缺失突变和点突变)的PD患者118例,其术后UPDRS评分改善率在“开”、“关”状态下分别为57.8%、68.2%,明显高于未发现基因缺失突变患者在“开”、“关”状态下分别为51.2%、60.0%的改善率,疗效持久。结论Parkin基因是帕金森病发病的最重要的遗传易感基因之一,其在家族性与散发性PD中表现出不同的突变类型,具有不同的遗传特性;具有Parkin基因突变的帕金森病患者均具有较好的手术疗效。对Parkin基因外显子的突变的检测,成为术前选择手术适应证的一个非常重要的判定指标。     

Polymorphisms of the parkin gene in sporadic Parkinson's disease among Chinese in Taiwan

The role of genetics in Parkinson's disease (PD), previously controversial, is now documented by several studies. A major breakthrough has been the discovery of two single-gene defects in familial PD. A single base pair change at position 209 from G to A (G209A) in the fourth exon of the alpha-synuclein gene has been identified in cases of autosomal dominant familial PD. Mutations in the Parkin gene can induce autosomal recessive juvenile parkinsonism. A polymorphism of R/W366 in the Parkin gene was found to be associated with a protective factor for sporadic PD. We surveyed the polymorphisms of the Parkin gene, including S/N167, R/W366 and V/L380, in 92 cases of sporadic PD and 98 nonaffected individuals in Taiwanese Chinese. The allele frequencies of these polymorphisms are not significantly different between PD and nonaffected controls. We conclude that polymorphisms of the Parkin gene, S/N167, R/W366, V/L380, are not genetic factors for sporadic PD among Chinese in Taiwan.     

Polymorphism in the parkin gene in sporadic Parkinson's disease.

We report polymorphism of the parkin gene in 160 sporadic Parkinson's disease (PD) patients and controls. Three polymorphisms were found: a G-to-A transition in exon 4 (S/N167), a C-to-T transition in exon 10 (R/W366), and a G-to-C transition in exon 10 (V/L380). Genotype distributions and allele frequencies of S/N167 and V/L380 did not differ significantly between the two groups. The R/W366 allele frequency was significantly lower in PD patients (1.2 vs 4.4%). The level of protection from PD provided by this allele was 3.60 (95% CI; range, 0.45-6.50), suggesting that it may be a protective factor against PD.     

DJ-1基因g.168185del多态性与新疆维吾尔族、汉族帕金森病的关系

目的探讨DJ-1基因启动子区多态性位点g.168₁85del与新疆维吾尔（维）族、汉族帕金森病（PD）的关系。方法提取364例原发性PD患者（PD组,维族175例,汉族189例）及346名正常对照者（正常对照组）基因组DNA,采用PCR方法扩增DJ-1启动子区基因片段,测序验证g.168₁85del的基因型和等位基因频率。结果 PD组与正常对照组间、PD组中维族亚组与汉族亚组间〗DJ-1基因g.168₁85del基因型及等位基因频率差异无统计学意义。结论 DJ-1基因g.168₁85del多态性可能与维族及汉族PD的遗传易感性无关。     

Mutation screening and association analysis of the parkin gene in Parkinson's disease patients from South-West China

Various deletions and point mutations in the Parkin gene have been strongly associated with Parkinson's disease (PD) and parkinsonism, especially when the onset occurs at a young age. In this study, we screened 25 "early-onset" (<49 years at onset) and 91 later-onset PD patients from a Han Chinese population from South-West China for deletions and mutations in the Parkin gene. We found no deletions or point mutations in exons 1-12 of the Parkin gene using direct sequence analysis and only detected the common Ser167Asn polymorphism. We analysed Ser167Asn in 116 patients with sporadic PD and 124 controls, matched for age and gender. There were significant differences in allele and genotype frequency between PD patients, with the 167Asn allele more common in cases than controls (46.6 vs. 35.1%; chi(2) = 6.54, p = 0.011, odds ratio = 1.61, 95% confidence interval, CI, 1.10-2.37), as was the 167Asn genotype (17.3 vs. 11.3%; p = 0.04). The frequency of the 167Ser genotype was significantly lower in PD patients than in controls when compared with that of the other two genotypes combined (chi(2) = 7.84, p = 0.005, odds ratio = 0.46, 95% CI 0.25 - 0.82). No significant differences in the frequencies of the allele and genotypes were found between patients classified into two groups according to symptoms at onset (chi(2) = 0.191, p = 0.66, odds ratio = 1.12, 95% CI 0.65-1.95; chi(2) = 0.24, p = 0.887) or age of onset (p = 0.787). In summary, homozygous deletion mutations and point mutations in exons 1-12 of the Parkin gene were not detected in this Han Chinese population, although we cannot exclude compound heterozygous deletions. In addition, our study suggests that the variant 167Asn increases the risk of developing PD.     

Association study of Parkin gene polymorphisms with idiopathic Parkinson disease

BACKGROUND: Previously, we detected linkage of idiopathic Parkinson disease (PD) to the region on chromosome 6 that contains the Parkin gene (D6S305; logarithm of odds score, 5.47) in families with at least one individual with age at onset younger than 40 years (families with early-onset disease). Further study demonstrated the presence of Parkin mutations in this data set. However, previous case-control studies have reported conflicting results regarding the role of more common Parkin polymorphisms as susceptibility alleles for idiopathic PD. OBJECTIVE: To investigate the association of 7 previously studied Parkin single-nucleotide polymorphisms (SNPs) throughout the promoter and most of the open reading frame with PD in a large cohort of patients with primarily late-onset PD. METHODS: One promoter, 3 intronic, and 3 exonic Parkin SNPs were genotyped in 1580 individuals belonging to 397 families, and their association with PD was evaluated using family-based association tests. RESULTS: No significant association (P>.05) between PD and any Parkin SNP allele or genotype was detected. Haplotype analysis and stratification by age at onset or family history also failed to produce significant results. CONCLUSIONS: These results suggest that these common variants of Parkin are not associated with PD in white patients, although Parkin mutations are known to cause early- and late-onset PD.     

Exonic deletion mutations of the Parkin gene among sporadic patients with Parkinson's disease

Exonic deletions of the Parkin gene are common in the autosomal recessive form of juvenile parkinsonism. Here we report Parkin gene mutations among apparently sporadic Parkinson's disease (PD) patients. We screened 200 patients with PD (103 women and 97 men). The age of onset was 54.2+/-10.3years (mean+/-S.D.).Four out of the 200 patients had homozygous exonic deletions in the Parkin gene. The clinical features of these four patients were essentially the same as those of idiopathic PD. The age of onset was consistently younger (33, 38, 47 and 48years, respectively). On medication, all of them were at Hoehn and Yahr stage II or III even after 12-16years from the onset of the disease.Thus 2% of apparently sporadic PD patients in Japan have homozygous Parkin gene mutations. This positive rate was 6.3% among the patients with the age of onset below 50. Our study suggests that the prevalence of the carrier state of Parkin gene may be more than that we expected. Our study warrants further studies on Parkin gene mutations in apparently sporadic PD patients.     

新疆地区维、汉族缺血性脑卒中患者磷酸二酯酶4D基因单核苷酸多态性的研究

目的探讨新疆地区维、汉族缺血性脑卒中患者磷酸二酯酶4D(PDE4D)基因87位点的单核苷酸多态性(SNP)。方法采用PCR限制性片段长度多态性(PCR-RFLP)和基因测序方法检测226例缺血性脑卒中患者(病例组,维族110例,汉族116例)和220例无神经系统疾病的患者(对照组,维族102例,汉族118例)PDE4D基因87位点的多态性。对各组基因型分布和等位基因频率进行比较。结果病例组与对照组PDE4D基因87位点的基因型分布比较,差异无统计学意义;病例组PDE4D基因87位点C等位基因频率明显高于对照组(P<0.05)。病例组维族亚组PDE4D基因87位点CC型的比率及C等位基因频率明显高于对照组维族亚组(均P<0.05);病例组汉族亚组PDE4D基因87位点CC型的比率及C等位基因频率明显高于对照组汉族亚组(均P<0.05)。病例组中,维族亚组与汉族亚组PDE4D基因87位点的基因型分布及等位基因频率比较,差异无统计学意义;对照组中,维族亚组与汉族亚组PDE4D基因87位点的基因型分布及等位基因频率比较,差异亦无统计学意义。结论 PDE4D基因87位点C等位基因频率增高可能增加缺血性脑卒中发生的风险,此风险在新疆地区维、汉族人群中没有差异。