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Ton ND, Thuan ND, Thuong MTH, Ngoc TTB, Nhung VP, Hoa NTT, Nam NH, Dung HT, Son ND, Ba NV, Bac ND, Tai TN, Dung LTK, Hung NT, Duong NT, Ha NH, Hai NV. Rare and novel variants of PRKN and PINK1 genes in Vietnamese patients with early-onset Parkinson's disease. Mol Genet Genomic Med 2020; 8:e1463. [PMID: 32856414 PMCID: PMC7549612 DOI: 10.1002/mgg3.1463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/10/2020] [Accepted: 07/31/2020] [Indexed: 12/16/2022] Open
Abstract
Background Early‐onset Parkinson's disease (EOPD) refers to that of patients who have been diagnosed or had onset of motor symptoms before age 50, accounting for 4% of Parkinson's disease patients. The PRKN and PINK1 genes, both involved in a metabolic pathway, are associated with EOPD. Methods To identify variants associated with EOPD, coding region of PARKIN and PINK1 genes in 112 patients and 112 healthy individuals were sequenced. Multiplex ligation‐dependent probe amplification kit was used to determine EOPD patients that carried mutations in PRKN and PINK1 genes. Results and Conclusion Three rare and three novel mutations in total of 14 variants of PARKIN and PINK1 were detected in the EOPD cohorts. Mutations of PRKN and PINK1 genes were found in five (4.4%) patients, which were four patients with compound heterozygous variants in the PRKN and one case with a homozygous mutation of the PINK1 gene. The novel mutations might reduce the stability of the PRKN and PINK1 protein molecules. The frequency of homozygous mutant genotype p.A340T of the PINK1 in the EOPD cohort was higher than in control (p = 0.0001, OR = 5.704), suggesting this variant might be a risk factor for EOPD. To the best of our knowledge, this is the first study of PRKN and PINK1 genes conducted on Vietnamese EOPD patients. These results might contribute to the genetic screening of EOPD in Vietnam.
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Affiliation(s)
- Nguyen Dang Ton
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Nguyen Duc Thuan
- 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Ma Thi Huyen Thuong
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Tran Thi Bich Ngoc
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Vu Phuong Nhung
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Nguyen Thi Thanh Hoa
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Nguyen Hoai Nam
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Hoang Thi Dung
- 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Nhu Dinh Son
- 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | | | | | - Tran Ngoc Tai
- University Medical Center HCMC, University of Medicine and Pharmacy at HCMC, Ho Chi Minh City, Vietnam
| | | | | | - Nguyen Thuy Duong
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Nguyen Hai Ha
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Nong Van Hai
- Institute of Genome Research, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
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García S, Chavira-Hernández G, Gallegos-Arreola MP, Dávila-Maldonado L, García Martínez F, Montes Almanza LA, Palma-Flores C, Mondragón-Terán P, Alcaraz Estrada SL, López-Hernández LB. The rs3857059 variant of the SNCA gene is associated with Parkinson's disease in Mexican Mestizos. Arq Neuropsiquiatr 2017; 74:445-9. [PMID: 27332068 DOI: 10.1590/0004-282x20160061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 03/02/2016] [Indexed: 11/22/2022]
Abstract
Among the candidate genes for Parkinson's disease (PD), SNCA has replicated association in different populations. Besides other known mutations in the SNCA gene, the rs3857059 variant has also been linked to various neurodegenerative disorders. Therefore, the aim of the present study was to search for association of this variant and sporadic PD in Mexican Mestizo patients. A case-control study was performed including 241 individuals, 106 patients, and 135 healthy controls. Genotyping was performed using real-time PCR. The rs3857059 variant demonstrated an association with PD in Mexican Mestizos (OR = 2.40, CI, 1.1 to 5.1, p = 0.02) under the recessive model. In addition, a gender effect was found for the GG genotype in females (OR = 1.31, CI, 1.01 to 1.7, p = 0.037). This is the first study to confirm an association of the rs3857059 variant with PD and also to show a gender effect. Our data contribute to the elucidation of the link between rs3857059 and susceptibility to PD observed in the Mexican Mestizo population.
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Affiliation(s)
- S García
- Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, México DF , México, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Centro Médico Nacional "20 de Noviembre", México DF, México
| | - G Chavira-Hernández
- Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, México DF , México, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Centro Médico Nacional "20 de Noviembre", México DF, México
| | - M P Gallegos-Arreola
- Centro de Investigación Biomédica de Occidente, Jalisco , México, Centro de Investigación Biomédica de Occidente, IMSS, Jalisco, México
| | - L Dávila-Maldonado
- Instituto de Ciencias Médicas y de la Nutrición Salvador Zubirán, México DF , México, Instituto de Ciencias Médicas y de la Nutrición Salvador Zubirán, México DF, México
| | - F García Martínez
- Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, México DF , México, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Centro Médico Nacional "20 de Noviembre", México DF, México
| | - L A Montes Almanza
- Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, México DF , México, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Centro Médico Nacional "20 de Noviembre", México DF, México
| | - C Palma-Flores
- Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, México DF , México, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Centro Médico Nacional "20 de Noviembre", México DF, México
| | - P Mondragón-Terán
- Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, México DF , México, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Centro Médico Nacional "20 de Noviembre", México DF, México
| | - S L Alcaraz Estrada
- Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, México DF , México, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Centro Médico Nacional "20 de Noviembre", México DF, México
| | - L B López-Hernández
- Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, México DF , México, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Centro Médico Nacional "20 de Noviembre", México DF, México
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Erer S, Egeli U, Zarifoglu M, Tezcan G, Cecener G, Tunca B, Ak S, Demirdogen E, Kenangil G, Kaleagası H, Dogu O, Saka E, Elibol B. Mutation analysis of the PARKIN, PINK1, DJ1, and SNCA genes in Turkish early-onset Parkinson's patients and genotype-phenotype correlations. Clin Neurol Neurosurg 2016; 148:147-53. [PMID: 27455133 DOI: 10.1016/j.clineuro.2016.07.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 05/03/2016] [Accepted: 07/02/2016] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Variations in PARK genes (PRKN, PINK1, DJ-1, and SNCA) cause early-onset Parkinson's disease (EOPD) in different populations. In the current study, we aimed to evaluate the frequencies of variations in PARK genes and the effects of these variations on the phenotypes of Turkish EOPD patients. METHODS All coding regions and exon-intron boundaries of the PRKN, PINK1, DJ-1, and SNCA genes were screened by heteroduplex analysis followed by direct sequencing of the detected variants in 50 Turkish EOPD patients. These variants were evaluated using SIFT, PolyPhen, HSF, and LOVD web-based programs. RESULTS The frequency of EOPD-associated variations in the PRKN gene was 34%. Among these variations, p.A82E in exon 3 and p.Q409X in exon 11 was determined to be pathogenic. We also defined previously unknown cryptic variations, including c.872-35 G>A and c.872-28T>G in exon 8 of PRKN and c.252+30 T>G and c.322+4 A>G in exons 4 and 5 of DJ1, respectively, that were associated with EOPD. Although no significant association was observed between the PARK gene mutations and clinical features (P>0.05), the alterations were related to the clinical symptoms in each patient. CONCLUSION An increasing number of studies report that PRKN, PINK1, DJ1 and SNCA mutations are associated with early-onset Parkinson's disease; however, a limited number of studies have been conducted in Turkey. Additionally, our study is the first to evaluate the frequency of SNCA mutations in a Turkish population. The aim of this study was determine the frequency distributions of the PRKN, PINK1, DJ1, and SNCA gene mutations and to analyze the relationships between these genetic variations and the clinical phenotype of EOPD in Turkish patients.
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Affiliation(s)
- Sevda Erer
- Department of Neurology, Medical Faculty, Uludag University, Bursa, Turkey.
| | - Unal Egeli
- Department of Medical Biology, Medical Faculty, Uludag University, Bursa, Turkey
| | - Mehmet Zarifoglu
- Department of Neurology, Medical Faculty, Uludag University, Bursa, Turkey
| | - Gulcin Tezcan
- Department of Medical Biology, Medical Faculty, Uludag University, Bursa, Turkey
| | - Gulsah Cecener
- Department of Medical Biology, Medical Faculty, Uludag University, Bursa, Turkey
| | - Berrin Tunca
- Department of Medical Biology, Medical Faculty, Uludag University, Bursa, Turkey
| | - Secil Ak
- Department of Medical Biology, Medical Faculty, Uludag University, Bursa, Turkey
| | - Elif Demirdogen
- Department of Medical Biology, Medical Faculty, Uludag University, Bursa, Turkey
| | - Gulay Kenangil
- Erenkoy Traning and Research hospital for neurologic and psychiatric disease, Istanbul, Turkey
| | - Hakan Kaleagası
- Department of Neurology, Medical Faculty, Mersin University, Mersin, Turkey
| | - Okan Dogu
- Department of Neurology, Medical Faculty, Mersin University, Mersin, Turkey
| | - Esen Saka
- Department of Neurology, Medical Faculty, Hacettepe University, Ankara, Turkey
| | - Bulent Elibol
- Department of Neurology, Medical Faculty, Hacettepe University, Ankara, Turkey
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Sanyal J, Jana A, Ghosh E, Banerjee TK, Chakraborty DP, Rao VR. Evaluation of PARKIN gene variants in West Bengal Parkinson's disease patients. J Hum Genet 2015; 60:485-92. [PMID: 26016408 DOI: 10.1038/jhg.2015.49] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 03/29/2015] [Accepted: 04/10/2015] [Indexed: 11/08/2022]
Abstract
Little information is available regarding the molecular pathogenesis of Parkinson's disease (PD) among the Bengalee population in West Bengal, India. This study was undertaken to determine the contribution of Parkin variants in well-defined ethnically identical Bengalee population of India and further to describe the clinical spectrum associated with these mutations. A total of 150 unrelated PD patients and 150 controls were recruited for the study. The entire cohort was screened for mutations in all the 12 exons of the gene along with flanking splice junctions by polymerase chain reaction and DNA sequencing. Eleven nucleotide variants including two novel changes were detected. Cerebrospinal fluid (CSF) parkin protein expression of the novel mutation, Val186Ile (found in heterozygous condition in one patient only) was almost 2.7 folds lower than the controls and other PD patients. Molecular characterization of polymorphisms Ser167Asn and Val380Leu depicted that homozygous Ser167 and Val380 are significantly associated with the disease. We did not find any linkage disequilibrium among the SNPs, the low r(2) for every pair of single-nucleotide polymorphisms (SNPs) indicated that these SNPs cannot be tagged by each other. Another novel intronic change, IVS8+48C>T was present in almost equally in PD patients and controls. Among the ethnically defined Bengalee population of West Bengal, occurrence of Parkin mutation is 4% (6/150) of the PD patient pool supported with decreased folds of expression of CSF PARKIN protein. Parkin polymorphisms, Ser167 and Val380 are risk factors for the progression of the disease, and their frequency is greatly influenced by ethnic origin.
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Oczkowska A, Kozubski W, Lianeri M, Dorszewska J. Mutations in PRKN and SNCA Genes Important for the Progress of Parkinson's Disease. Curr Genomics 2014; 14:502-17. [PMID: 24532983 PMCID: PMC3924246 DOI: 10.2174/1389202914666131210205839] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 11/12/2013] [Accepted: 11/25/2013] [Indexed: 11/30/2022] Open
Abstract
Although Parkinson’s disease (PD) was first described almost 200 years ago, it remains an incurable disease
with a cause that is not fully understood. Nowadays it is known that disturbances in the structure of pathological proteins
in PD can be caused by more than environmental and genetic factors. Despite numerous debates and controversies in the
literature about the role of mutations in the SNCA and PRKN genes in the pathogenesis of PD, it is evident that these
genes play a key role in maintaining dopamine (DA) neuronal homeostasis and that the dysfunction of this homeostasis is
relevant to both familial (FPD) and sporadic (SPD) PD with different onset. In recent years, the importance of alphasynuclein
(ASN) in the process of neurodegeneration and neuroprotective function of the Parkin is becoming better understood.
Moreover, there have been an increasing number of recent reports indicating the importance of the interaction between
these proteins and their encoding genes. Among others interactions, it is suggested that even heterozygous substitution
in the PRKN gene in the presence of the variants +2/+2 or +2/+3 of NACP-Rep1 in the SNCA promoter, may increase
the risk of PD manifestation, which is probably due to ineffective elimination of over-expressed ASN by the mutated
Parkin protein. Finally, it seems that genetic testing may be an important part of diagnostics in patients with PD and may
improve the prognostic process in the course of PD. However, only full knowledge of the mechanism of the interaction
between the genes associated with the pathogenesis of PD is likely to help explain the currently unknown pathways of selective
damage to dopaminergic neurons in the course of PD.
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Affiliation(s)
- Anna Oczkowska
- Laboratory of Neurobiology, Department of Neurology, Poznan University of Medical Sciences, Poznan, Poland
| | - Wojciech Kozubski
- Chair and Department of Neurology, Poznan University of Medical Sciences, Poznan, Poland
| | - Margarita Lianeri
- Department of Biochemistry and Molecular Biology, Poznan University of Medical Sciences, Poznan, Poland
| | - Jolanta Dorszewska
- Laboratory of Neurobiology, Department of Neurology, Poznan University of Medical Sciences, Poznan, Poland
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Zhou Y, Luo X, Li F, Tian X, Zhu L, Yang Y, Ren Y, Pang H. Association of Parkinson’s disease with six single nucleotide polymorphisms located in four PARK genes in the northern Han Chinese population. J Clin Neurosci 2012; 19:1011-5. [DOI: 10.1016/j.jocn.2011.09.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 09/26/2011] [Accepted: 09/30/2011] [Indexed: 10/28/2022]
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Zhang Y, Wang ZZ, Sun HM. Lack of association between p.Ser167Asn variant of Parkin and Parkinson's disease: a meta-analysis of 15 studies involving 2,280 cases and 2,459 controls. Am J Med Genet B Neuropsychiatr Genet 2012; 159B:38-47. [PMID: 22095653 DOI: 10.1002/ajmg.b.31250] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Accepted: 10/18/2011] [Indexed: 01/08/2023]
Abstract
Previous clinical trials have evaluated the association between Parkin p.Ser167Asn (c.601G>A) variant and Parkinson's disease (PD) risk. However, the results remain conflicting rather than conclusive. Therefore, we performed this meta-analysis to assess whether pooled results show the association. We performed structured literature searches for studies addressing the association between the Parkin p.Ser167Asn variant and PD risk. We conducted analyses of study characteristics, heterogeneity, and funnel plot asymmetry in analyses analogous to additive, dominant, recessive, and general genetic models with the odds ratio (OR) as the measure of association. When 15 eligible studies (n = 4,739 subjects) were pooled into the meta-analysis, there was no evidence for significant association in additive genetic model between Parkin p. Ser167Asn variant and PD risk (OR = 1.02, 95% confidence interval (CI) = 0.83-1.25; P = 0.866). The OR for the dominant model was 1.06 (95% CI = 0.80-1.41) while the OR for the recessive model was 0.90 (95% CI = 0.71-1.14). The OR for the heterozygous was 1.07 (95% CI = 0.80-1.43) while the OR for the homozygotes was 1.19 (95% CI = 0.81-1.74). In the subgroup analysis by ethnicity, no significant association was found in any genetic model. Begg's funnel plot and Egger's test provided visual and statistical evidences for funnel plot symmetry, suggesting no presence of publication bias. In summary, the meta-analysis strongly suggests that Parkin p. Ser167Asn variant is not associated with PD risk.
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Affiliation(s)
- Yi Zhang
- Department of Anatomy, School of Preclinical Medicine, Beijing University of Chinese Medicine, Beijing, China
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