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Wang L, Aasly JO, Annesi G, Bardien S, Bozi M, Brice A, Carr J, Chung SJ, Clarke C, Crosiers D, Deutschländer A, Eckstein G, Farrer MJ, Goldwurm S, Garraux G, Hadjigeorgiou GM, Hicks AA, Hattori N, Klein C, Jeon B, Kim YJ, Lesage S, Lin JJ, Lynch T, Lichtner P, Lang AE, Mok V, Jasinska-Myga B, Mellick GD, Morrison KE, Opala G, Pihlstrøm L, Pramstaller PP, Park SS, Quattrone A, Rogaeva E, Ross OA, Stefanis L, Stockton JD, Silburn PA, Theuns J, Tan EK, Tomiyama H, Toft M, Van Broeckhoven C, Uitti RJ, Wirdefeldt K, Wszolek Z, Xiromerisiou G, Yueh KC, Zhao Y, Gasser T, Maraganore DM, Krüger R, Sharma M. Large-scale assessment of polyglutamine repeat expansions in Parkinson disease. Neurology 2015; 85:1283-92. [PMID: 26354989 DOI: 10.1212/wnl.0000000000002016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 05/21/2015] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES We aim to clarify the pathogenic role of intermediate size repeat expansions of SCA2, SCA3, SCA6, and SCA17 as risk factors for idiopathic Parkinson disease (PD). METHODS We invited researchers from the Genetic Epidemiology of Parkinson's Disease Consortium to participate in the study. There were 12,346 cases and 8,164 controls genotyped, for a total of 4 repeats within the SCA2, SCA3, SCA6, and SCA17 genes. Fixed- and random-effects models were used to estimate the summary risk estimates for the genes. We investigated between-study heterogeneity and heterogeneity between different ethnic populations. RESULTS We did not observe any definite pathogenic repeat expansions for SCA2, SCA3, SCA6, and SCA17 genes in patients with idiopathic PD from Caucasian and Asian populations. Furthermore, overall analysis did not reveal any significant association between intermediate repeats and PD. The effect estimates (odds ratio) ranged from 0.93 to 1.01 in the overall cohort for the SCA2, SCA3, SCA6, and SCA17 loci. CONCLUSIONS Our study did not support a major role for definite pathogenic repeat expansions in SCA2, SCA3, SCA6, and SCA17 genes for idiopathic PD. Thus, results of this large study do not support diagnostic screening of SCA2, SCA3, SCA6, and SCA17 gene repeats in the common idiopathic form of PD. Likewise, this largest multicentered study performed to date excludes the role of intermediate repeats of these genes as a risk factor for PD.
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Affiliation(s)
- Lisa Wang
- Authors' affiliations are listed at the end of the article
| | - Jan O Aasly
- Authors' affiliations are listed at the end of the article
| | - Grazia Annesi
- Authors' affiliations are listed at the end of the article
| | - Soraya Bardien
- Authors' affiliations are listed at the end of the article
| | - Maria Bozi
- Authors' affiliations are listed at the end of the article
| | - Alexis Brice
- Authors' affiliations are listed at the end of the article
| | - Jonathan Carr
- Authors' affiliations are listed at the end of the article
| | - Sun J Chung
- Authors' affiliations are listed at the end of the article
| | - Carl Clarke
- Authors' affiliations are listed at the end of the article
| | - David Crosiers
- Authors' affiliations are listed at the end of the article
| | | | | | | | | | - Gaetan Garraux
- Authors' affiliations are listed at the end of the article
| | | | - Andrew A Hicks
- Authors' affiliations are listed at the end of the article
| | | | | | - Beom Jeon
- Authors' affiliations are listed at the end of the article
| | - Yun J Kim
- Authors' affiliations are listed at the end of the article
| | - Suzanne Lesage
- Authors' affiliations are listed at the end of the article
| | - Juei-Jueng Lin
- Authors' affiliations are listed at the end of the article
| | - Timothy Lynch
- Authors' affiliations are listed at the end of the article
| | - Peter Lichtner
- Authors' affiliations are listed at the end of the article
| | - Anthony E Lang
- Authors' affiliations are listed at the end of the article
| | - Vincent Mok
- Authors' affiliations are listed at the end of the article
| | | | | | | | - Grzegorz Opala
- Authors' affiliations are listed at the end of the article
| | | | | | - Sung S Park
- Authors' affiliations are listed at the end of the article
| | - Aldo Quattrone
- Authors' affiliations are listed at the end of the article
| | | | - Owen A Ross
- Authors' affiliations are listed at the end of the article
| | | | | | | | - Jessie Theuns
- Authors' affiliations are listed at the end of the article
| | - Eng K Tan
- Authors' affiliations are listed at the end of the article
| | | | - Mathias Toft
- Authors' affiliations are listed at the end of the article
| | | | - Ryan J Uitti
- Authors' affiliations are listed at the end of the article
| | | | | | | | - Kuo-Chu Yueh
- Authors' affiliations are listed at the end of the article
| | - Yi Zhao
- Authors' affiliations are listed at the end of the article
| | - Thomas Gasser
- Authors' affiliations are listed at the end of the article
| | | | - Rejko Krüger
- Authors' affiliations are listed at the end of the article
| | - Manu Sharma
- Authors' affiliations are listed at the end of the article.
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Ortega-Cubero S, Lorenzo-Betancor O, Lorenzo E, Agúndez JAG, Jiménez-Jiménez FJ, Ross OA, Wurster I, Mielke C, Lin JJ, Coria F, Clarimon J, Ezquerra M, Brighina L, Annesi G, Alonso-Navarro H, García-Martin E, Gironell A, Marti MJ, Yueh KC, Wszolek ZK, Sharma M, Berg D, Krüger R, Pastor MA, Pastor P. TREM2 R47H variant and risk of essential tremor: a cross-sectional international multicenter study. Parkinsonism Relat Disord 2014; 21:306-9. [PMID: 25585992 DOI: 10.1016/j.parkreldis.2014.12.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/07/2014] [Accepted: 12/10/2014] [Indexed: 01/22/2023]
Abstract
INTRODUCTION Essential tremor (ET) is the most frequent movement disorder in adults. Its pathophysiology is not clearly understood, however there is growing evidence showing common etiologic factors with other neurodegenerative disorders such as Alzheimer's and Parkinson's diseases (AD, PD). Recently, a rare p.R47H substitution (rs75932628) in the TREM2 protein (triggering receptor expressed on myeloid cells 2; OMIM: *605086) has been proposed as a risk factor for AD, PD and amyotrophic lateral sclerosis (ALS). The objective of the study was to determine whether TREM2 p.R47H allele is also a risk factor for developing ET. METHODS This was a cross-sectional multicenter international study. An initial case-control cohort from Spain (n = 456 ET, n = 2715 controls) was genotyped. In a replication phase, a case-control series (n = 897 ET, n = 1449 controls) from different populations (Italy, Germany, North-America and Taiwan) was studied. Owed to the rarity of the variant, published results on p.R47H allele frequency from 14777 healthy controls from European, North American or Chinese descent were additionally considered. The main outcome measure was p.R47H (rs75932628) allelic frequency. RESULTS There was a significant association between TREM2 p.R47H variant and ET in the Spanish cohort (odds ratio [OR], 5.97; 95% CI, 1.203-29.626; p = 0.042), but it was not replicated in other populations. CONCLUSIONS These results argue in favor of population-specific differences in the allelic distribution and suggest that p.R47H (rs75932628) variant may contribute to the susceptibility of ET in Spanish population. However, taking into account the very low frequency of p.R47H, further confirmatory analyses of larger ET series are needed.
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Affiliation(s)
- Sara Ortega-Cubero
- Neurogenetics Laboratory, Division of Neurosciences, Center for Applied Medical Research, University of Navarra (CIMA), Pamplona, Spain; Department of Neurology, Clínica Universidad de Navarra, University of Navarra School of Medicine, Pamplona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas, CIBERNED, Instituto de Salud Carlos III, Madrid, Spain
| | | | - Elena Lorenzo
- Neurogenetics Laboratory, Division of Neurosciences, Center for Applied Medical Research, University of Navarra (CIMA), Pamplona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas, CIBERNED, Instituto de Salud Carlos III, Madrid, Spain
| | - José A G Agúndez
- Department of Pharmacology, University of Extremadura, Cáceres, Spain
| | | | - Owen A Ross
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - Isabel Wurster
- Department for Neurodegenerative Diseases (DZNE), Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Carina Mielke
- Department for Neurodegenerative Diseases (DZNE), Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Juei-Jueng Lin
- Department of Neurology, Chushang Show-Chwan Hospital, Nantou, Taiwan; Department of Neurology, Chung-Shan Medical University Hospital, Taichung, Taiwan
| | - Francisco Coria
- Department of Neurology, Son Espases University Hospital, Mallorca, Spain
| | - Jordi Clarimon
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas, CIBERNED, Instituto de Salud Carlos III, Madrid, Spain; Neurology Department, Institut d'Investigacions Biomediques Sant Pau, Hospital de Sant Pau, Universitat Autónoma de Barcelona, Barcelona, Spain
| | - Mario Ezquerra
- Parkinson's Disease and Movement Disorders Unit, Neurology Service, Institut Clinic de Neurociencies, Hospital Clinic de Barcelona, CIBERNED, Barcelona, Spain
| | - Laura Brighina
- Department of Neurology, San Gerardo Hospital, Milan Center for Neuroscience, University of Milano-Bicocca, Monza, Italy
| | - Grazia Annesi
- Section of Neuroimaging, Institute of Molecular Bioimaging and Physiology, National Research Council, Catanzaro, Italy
| | | | - Elena García-Martin
- Department of Biochemistry of Molecular Biology, University of Extremadura, Cáceres, Spain
| | - Alex Gironell
- Movement Disorders Unit, Department of Neurology, Hospital de Sant Pau, Universitat Autónoma de Barcelona, Barcelona, Spain
| | - Maria J Marti
- Parkinson's Disease and Movement Disorders Unit, Neurology Service, Institut Clinic de Neurociencies, Hospital Clinic de Barcelona, CIBERNED, Barcelona, Spain
| | - Kuo-Chu Yueh
- Department of Neurology, Chushang Show-Chwan Hospital, Nantou, Taiwan
| | | | - Manu Sharma
- Department for Neurodegenerative Diseases (DZNE), Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Daniela Berg
- Department for Neurodegenerative Diseases (DZNE), Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Rejko Krüger
- Department for Neurodegenerative Diseases (DZNE), Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany; Luxembourg Center for Systems Biomedicine, University of Luxembourg and Centre Hospitalier de Luxembourg, Luxembourg
| | - Maria A Pastor
- Department of Neurology, Clínica Universidad de Navarra, University of Navarra School of Medicine, Pamplona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas, CIBERNED, Instituto de Salud Carlos III, Madrid, Spain; Neuroimaging Laboratory, Division of Neurosciences, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain
| | - Pau Pastor
- Neurogenetics Laboratory, Division of Neurosciences, Center for Applied Medical Research, University of Navarra (CIMA), Pamplona, Spain; Department of Neurology, Clínica Universidad de Navarra, University of Navarra School of Medicine, Pamplona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas, CIBERNED, Instituto de Salud Carlos III, Madrid, Spain; Department of Neurology, Hospital Universitari Mutua de Terrassa, Terrassa, Barcelona, Spain.
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Sharma M, Ioannidis JPA, Aasly JO, Annesi G, Brice A, Bertram L, Bozi M, Barcikowska M, Crosiers D, Clarke CE, Facheris MF, Farrer M, Garraux G, Gispert S, Auburger G, Vilariño-Güell C, Hadjigeorgiou GM, Hicks AA, Hattori N, Jeon BS, Jamrozik Z, Krygowska-Wajs A, Lesage S, Lill CM, Lin JJ, Lynch T, Lichtner P, Lang AE, Libioulle C, Murata M, Mok V, Jasinska-Myga B, Mellick GD, Morrison KE, Meitnger T, Zimprich A, Opala G, Pramstaller PP, Pichler I, Park SS, Quattrone A, Rogaeva E, Ross OA, Stefanis L, Stockton JD, Satake W, Silburn PA, Strom TM, Theuns J, Tan EK, Toda T, Tomiyama H, Uitti RJ, Van Broeckhoven C, Wirdefeldt K, Wszolek Z, Xiromerisiou G, Yomono HS, Yueh KC, Zhao Y, Gasser T, Maraganore D, Krüger R. A multi-centre clinico-genetic analysis of the VPS35 gene in Parkinson disease indicates reduced penetrance for disease-associated variants. J Med Genet 2013; 49:721-6. [PMID: 23125461 PMCID: PMC3488700 DOI: 10.1136/jmedgenet-2012-101155] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Background Two recent studies identified a mutation (p.Asp620Asn) in the vacuolar protein sorting 35 gene as a cause for an autosomal dominant form of Parkinson disease . Although additional missense variants were described, their pathogenic role yet remains inconclusive. Methods and results We performed the largest multi-center study to ascertain the frequency and pathogenicity of the reported vacuolar protein sorting 35 gene variants in more than 15,000 individuals worldwide. p.Asp620Asn was detected in 5 familial and 2 sporadic PD cases and not in healthy controls, p.Leu774Met in 6 cases and 1 control, p.Gly51Ser in 3 cases and 2 controls. Overall analyses did not reveal any significant increased risk for p.Leu774Met and p.Gly51Ser in our cohort. Conclusions Our study apart from identifying the p.Asp620Asn variant in familial cases also identified it in idiopathic Parkinson disease cases, and thus provides genetic evidence for a role of p.Asp620Asn in Parkinson disease in different populations worldwide.
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Affiliation(s)
- Manu Sharma
- Department. of Neurodegenerative diseases, Hertie-Institute for Clinical Brain Research and DZNE- German Center for Neurodegenerative Diseases, Tübingen, Hoppe-Seyler-Str. 3, Tübingen 72076, Germany
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Yeh TH, Lin JJ, Lai SC, Wu-Chou YH, Chen AC, Yueh KC, Chen RS, Lu CS. Familial paroxysmal nonkinesigenic dyskinesia: Clinical and genetic analysis of a Taiwanese family. J Neurol Sci 2012; 323:80-4. [DOI: 10.1016/j.jns.2012.08.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 08/16/2012] [Accepted: 08/17/2012] [Indexed: 01/29/2023]
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Sharma M, Ioannidis JPA, Aasly JO, Annesi G, Brice A, Van Broeckhoven C, Bertram L, Bozi M, Crosiers D, Clarke C, Facheris M, Farrer M, Garraux G, Gispert S, Auburger G, Vilariño-Güell C, Hadjigeorgiou GM, Hicks AA, Hattori N, Jeon B, Lesage S, Lill CM, Lin JJ, Lynch T, Lichtner P, Lang AE, Mok V, Jasinska-Myga B, Mellick GD, Morrison KE, Opala G, Pramstaller PP, Pichler I, Park SS, Quattrone A, Rogaeva E, Ross OA, Stefanis L, Stockton JD, Satake W, Silburn PA, Theuns J, Tan EK, Toda T, Tomiyama H, Uitti RJ, Wirdefeldt K, Wszolek Z, Xiromerisiou G, Yueh KC, Zhao Y, Gasser T, Maraganore D, Krüger R. Large-scale replication and heterogeneity in Parkinson disease genetic loci. Neurology 2012; 79:659-67. [PMID: 22786590 DOI: 10.1212/wnl.0b013e318264e353] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE Eleven genetic loci have reached genome-wide significance in a recent meta-analysis of genome-wide association studies in Parkinson disease (PD) based on populations of Caucasian descent. The extent to which these genetic effects are consistent across different populations is unknown. METHODS Investigators from the Genetic Epidemiology of Parkinson's Disease Consortium were invited to participate in the study. A total of 11 SNPs were genotyped in 8,750 cases and 8,955 controls. Fixed as well as random effects models were used to provide the summary risk estimates for these variants. We evaluated between-study heterogeneity and heterogeneity between populations of different ancestry. RESULTS In the overall analysis, single nucleotide polymorphisms (SNPs) in 9 loci showed significant associations with protective per-allele odds ratios of 0.78-0.87 (LAMP3, BST1, and MAPT) and susceptibility per-allele odds ratios of 1.14-1.43 (STK39, GAK, SNCA, LRRK2, SYT11, and HIP1R). For 5 of the 9 replicated SNPs there was nominally significant between-site heterogeneity in the effect sizes (I(2) estimates ranged from 39% to 48%). Subgroup analysis by ethnicity showed significantly stronger effects for the BST1 (rs11724635) in Asian vs Caucasian populations and similar effects for SNCA, LRRK2, LAMP3, HIP1R, and STK39 in Asian and Caucasian populations, while MAPT rs2942168 and SYT11 rs34372695 were monomorphic in the Asian population, highlighting the role of population-specific heterogeneity in PD. CONCLUSION Our study allows insight to understand the distribution of newly identified genetic factors contributing to PD and shows that large-scale evaluation in diverse populations is important to understand the role of population-specific heterogeneity.
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Affiliation(s)
- Manu Sharma
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.
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Lin JJ, Yueh KC, Liu CS, Liu JT, Lin SZ. 5,10-methylenetetrahydrofolate reductase C677T gene polymorphism can influence age at onset of Parkinson's disease. Acta Neurol Taiwan 2007; 16:150-157. [PMID: 17966954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A case-control study was designed to investigate a possible genetic susceptibility of the MTHFR C677T polymorphism and assess whether the genetic polymorphism could be a predictor of levodopa-induced adverse effects in patients with Parkinson's disease (PD) of Chinese descent living in Taiwan. There were 94 sporadic PD patients with levodopa therapy at least for five years and 146 control subjects, matched by sex and gender, in this study. Results revealed that there were no differences of the allelic and genotypic frequencies of the MTHFR C677T polymorphism between PD patients and the controls. Analysis of age at onset stratified by MTHFR C677T polymorphism showed a trend of early age at onset in the PD patients carrying with T allele. The genetic influence was particularly significant in late-onset PD (onset age at or older than 60 years) with an early age at onset for 3.4 years. However, the MTHFR C677T polymorphism was not associated with the risk to develop dyskinesia, motor fluctuation and psychosis induced by levodopa in PD patients. In conclusion, results of the study revealed that the MTHFR C677T polymorphism could significantly influence age at onset of PD in Chinese population, but neither as a genetic susceptibility nor as a predictor of levodopa-induced adverse effects in PD.
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Affiliation(s)
- Juei-Jueng Lin
- Department of Neurology, Chushang Show-Chwan Hospital, Nantou, Taiwan.
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Lin JJ, Yueh KC, Lin SZ, Harn HJ, Liu JT. Genetic polymorphism of the angiotensin converting enzyme and L-dopa-induced adverse effects in Parkinson's disease. J Neurol Sci 2006; 252:130-4. [PMID: 17196621 DOI: 10.1016/j.jns.2006.10.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Revised: 10/19/2006] [Accepted: 10/30/2006] [Indexed: 11/23/2022]
Abstract
There was increasing evidence suggesting that angiotensin I-converting enzyme may play an important role in the pathogenesis of PD. Our former study has shown that angiotensin I-converting enzyme gene (ACE) may confer a susceptibility for the risk of Parkinson's disease (PD). Meanwhile, recent studies have emphasized that genetic factors may involve in the occurrence of the adverse effects of chronic L-dopa therapy in PD patients. This study was designed to assess whether genetic polymorphism of the ACE could be a predictor of L-dopa-induced adverse effects in PD. There were 251 patients included in this study and their mean age at onset of disease was 63.3+/-11.4 years. The duration of disease and the treatment with L-dopa was 6.3+/-5.1 and 5.0+/-4.3 years, respectively. The frequency of the homozygote ACE-II genotype of the ACE in PD patients with L-dopa-induced psychosis was significantly higher than that in PD patients without the adverse effect (63.3% vs 43.0%; chi(2)=6.347, OR=1.435, 95%CI=1.105-1.864, p=0.012). However, the ACE polymorphism was not associated with the risk to develop dyskinesia or motor fluctuation induced by L-dopa. Furthermore, a logistic regression analysis confirmed that the ACE-II genotype was an independent risk factor for L-dopa-induced psychosis in PD patients (OR=2.542, p=0.012). In conclusion, results of the study showed that ACE-II genotype might confer a primary predictor for the occurrence of psychosis in L-dopa-treated PD.
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Affiliation(s)
- Juei-Jueng Lin
- Department of Neurology, Chushang Show-Chwan Hospital, Nantou, 557, Taiwan.
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Lin JJ, Chen CH, Yueh KC, Chang CY, Lin SZ. A CD14 monocyte receptor polymorphism and genetic susceptibility to Parkinson's disease for females. Parkinsonism Relat Disord 2006; 12:9-13. [PMID: 16337421 DOI: 10.1016/j.parkreldis.2005.07.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2005] [Revised: 07/11/2005] [Accepted: 07/13/2005] [Indexed: 11/21/2022]
Abstract
Recent studies suggest that inflammation may play an important role in the pathogenesis of Parkinson's disease (PD). Because the C(-260) --> T polymorphism in the promoter of the CD14 monocyte receptor gene (pCD14) could affect the predisposition to the inflammatory response, we conducted a case-control study to investigate a possible genetic susceptibility of the pCD14 polymorphism in patients with PD. This study included 200 sporadic PD patients and 200 controls, matched by sex and case-control pairs for age at onset in the case. All observed genotype frequencies were in Hardy-Weinberg equilibrium. Results revealed that the CD14-T allele of the pCD14 polymorphism in the female PD patients existed statistically significant difference from that of the female controls (OR = 1.262, P = 0.038), but not for male. Female individuals with homozygote CD14-TT genotype were significantly increased risk of PD by 1.28 time (P = 0.027). Furthermore, a logistic regression analysis confirmed that the homozygote CD14-TT genotype was an independent risk factor for PD (OR = 1.576, P = 0.030). In conclusion, results of this study indicate the pCD14 polymorphism to be a genetic risk factor for PD in females.
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Affiliation(s)
- J J Lin
- Department of Neurology, Chushang Show-Chwan Hospital, Nantou, 557, Taiwan, ROC.
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Lin JJ, Wang PJ, Chen CH, Yueh KC, Lin SZ, Harn HJ. Homozygous deletion genotype of angiotensin converting enzyme confers protection against migraine in man. Acta Neurol Taiwan 2005; 14:120-5. [PMID: 16252613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Studies have shown that migraine may have a major genetic component. Meanwhile, angiotensin converting enzyme (ACE) gene has been implicated as a genetic factor associated with migraine. We designed a case-control study to investigate the association between ACE and migraine in 240 migraine patients and 200 healthy controls, matched by age and sex. There was no significant difference in allelic frequency (I and D) and genotype polymorphism (DD, DI and II) of the ACE gene in migraine patients and controls. Analysis of the difference in ACE polymorphism stratified by gender revealed that male migraine patients with the homozygote DD genotype (ACE-DD) were significantly fewer than that of male controls (OR = 0.331, p = 0.045). There was no existence of a difference among the frequency and duration of headache in each subgroup of migraine patients stratified by ACE genotype. Our findings indicate that ACE-DD may have a slight protective effect against migraine in male patients.
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Affiliation(s)
- Juei-Jueng Lin
- Department of Neurology, Chushang Show-Chwan Hospital, No. 75, Sec. 2, Chi-Shang Road, Chushang Jenn, Nantou, Taiwan.
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Abstract
BACKGROUND This study was designed to assess the diagnostic value and clinical benefits of lumbar zygapophyseal joint injections in patients with chronic lower back pain. METHODS Two hundred and seventy-seven patients (136 males and 141 females, aged 15-82 years) with chronic lower back pain were enrolled in the trial and met the following criteria: pain for more than 1 year; no root signs; and no history of back surgery. Under fluoroscope, a 0.8-1.5 mL mixture of lidocaine, betamethasone dipropionate and iopamidol (1:1:0.5) was injected into each joint after intra-articular localization of the needle tip was confirmed. A questionnaire with a pain scale was administered immediately or the day after injection, and then after 1, 3, 6 and 12 weeks. Partial arthrograms were reviewed by a radiologist. RESULTS Four hundred and forty-nine joint injections were performed in 277 patients (L3-4, n = 76; L4-5, n = 272; L5-S1, n = 101). Bilateral injections were performed in 117 patients (42.2%). The study group comprised 204 patients (73.6%) with an excellent or good response, whereas the control group comprised the remaining 73 patients (26.4%). The rates of good response in the study group were 72.1% (147/204) after 3 weeks, 40.7% (83/204) after 6 weeks, and 31.4% (64/204) after 12 weeks. Partial arthrograms revealed 25 patients (9.0%) with synovial cysts (L3-4, n = 3; L4-5, n = 14; L5-S1, n = 8); 23 of these patients (92.0%) had a good response to the injections. Five of the 6 patients with spondylolysis (83.3%), having abnormal communication between the injected and contiguous joint, had a good response to the injections. The abovementioned, abnormal partial-arthrogram findings correlated significantly with the rate of good response to the injections. Although 3 patients had contrast medium extravasated into the epidural space during injection, none of the 277 patients had deteriorating lower back pain after the injections. CONCLUSION Lumbar zygapophyseal joint injections, as a useful diagnostic tool for facet joint syndrome, could also have useful palliative effects in the management of chronic lower back pain.
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Affiliation(s)
- Chunhsi Shih
- Department of Radiology, Chu-Shang Show-Chwan Hospital, Nantou, Taiwan, R.O.C.
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Lin JJ, Yueh KC, Chang CY, Chen CH, Lin SZ. The homozygote AA genotype of the α1-antichymotrypsin gene may confer protection against early-onset Parkinson's disease in women. Parkinsonism Relat Disord 2004; 10:469-73. [PMID: 15542006 DOI: 10.1016/j.parkreldis.2004.06.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
There has been increasing evidence suggesting that inflammatory response maybe involved in the pathogenesis of Parkinson's disease (PD). Alpha1-antichymotrypsin gene (ACT) has been regarded as a susceptibility factor for PD in the past, but the evidence remains controversial. This case-control study was designed to investigate the association of alpha1-antichymotrypsin gene (ACT) polymorphism between 210 Taiwanese patients with clinical definite sporadic PD and 260 controls, matched by age and sex. There were no differences of allelic frequency (A and T) and genotype polymorphism (AA, AT and TT) of the ACT in PD patients from the controls. However, there were significantly fewer early-onset PD (onset age younger than 60 years) or PD women carrying the homozygote AA genotype (ACT-AA) than in controls (p=0.046 and 0.044, respectively). Further analysis revealed that the reduced risk of ACT-AA was particularly significant among PD women with the onset age younger than 60 years (OR=0.796, 95% CI=0.749-0.847, p<0.0001). This study shows that ACT-AA may confer a modest protection against developing early-onset PD in women.
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Affiliation(s)
- J J Lin
- Department of Neurology, Chushang Show-Chwan Hospital, 75 Sec. 2 Chi-Shang Road, Chushang Jenn, Nantou 557, Taiwan.
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Lin JJ, Yueh KC, Chang DC, Chang CY, Yeh YH, Lin SZ. The homozygote 10-copy genotype of variable number tandem repeat dopamine transporter gene may confer protection against Parkinson's disease for male, but not to female patients. J Neurol Sci 2003; 209:87-92. [PMID: 12686408 DOI: 10.1016/s0022-510x(03)00002-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We investigated the role of variable number tandem repeat (VNTR) polymorphism of the dopamine transporter gene (DAT) in the pathogenesis of Parkinson's disease (PD) in Taiwanese. A case-control study was carried out to examine the association of the VNTR polymorphism within the DAT between 193 sporadic PD patients and 254 controls, matched by age and sex. Six alleles of VNTR polymorphism in the DAT, consisting of 6, 7, 8, 9, 10 and 11 copies of the 40-base-pair (bp) repeat sequence, were detected in the study. There were no differences of allele frequency (chi(2)=5.239, p=0.387) and genotype polymorphism of the DAT VNTR (chi(2)=11.873, p=0.157) in PD patients from the controls. Further analysis stratified by sex and age at onset did not show associations. However, PD patients carrying homozygote 10-copy genotype of the DAT VNTR polymorphism were 0.67 times fewer than controls (chi(2)=4.569, odds radio (OR)=0.67, 95% confidence interval (CI)=0.45-0.97, p=0.033). The reduced risk of the homozygosity with PD genotype was only in male PD patients (chi(2)=2.923, OR=0.48, 95% CI=0.25-0.93, p=0.026), but not in female PD patients (chi(2)=0.002, OR=1.02, 95% CI=0.49-2.11, p=0.966). In conclusion, the results of our study show that homozygote 10-copy genotype of the VNTR polymorphism within the DAT may confer a protective factor for male PD patients, but not for female PD patients.
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Affiliation(s)
- Juei-Jueng Lin
- Department of Neurology, Chushang Show-Chwan Hospital, Nantou, Taiwan, ROC.
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Abstract
This study was designed to investigate the hypothesis that deletion/insertion (D/I) polymorphism of the angiotensin-converting enzyme (ACE) gene may contribute to increased risk of Parkinson's disease (PD). A case-control study was carried out to examine the association between the ACE genotype and the allele frequency in 127 sporadic PD patients compared with 198 healthy controls. The frequency of the homozygote DD genotype of the ACE gene was significantly increased in patients with PD than in the controls (chi(2)=6.09, p=0.048), despite that there was no significant difference in D/I allele frequency (chi(2)=2.25, p=0.133). Moreover, PD patients carrying the homozygote DD genotype were 1.13 times more frequent than subjects without the DD genotype (chi(2)=5.67, 95% CI=1.01-1.25, p=0.017). A stepwise logistic regression analysis of the presence of the DD genotype and data on risk factors for PD confirmed that the homozygote DD genotype was a modest independent risk factor for PD (OR=1.32, 95% CI=1.12-2.16). In addition, there was a trend of increasing number of DD genotype in older PD patients and the modest risk factor of DD genotype in PD was due to the significant difference of the DD homozygosity in old patients with onset age at or after 60 years. In conclusion, results of our study support the hypothesis that the ACE gene may indicate genetic susceptibility to PD, particularly in older individuals.
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Affiliation(s)
- Juei-Jueng Lin
- Department of Neurology, Chushang Show-Chwan Hospital, No. 75 Section 2, Chi-Shang Road, Chushang Jenn, Nantou 557, Taiwan.
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Lin JJ, Yueh KC, Lin GY, Chang DC, Chang CY, Shieh HL, Harn HJ. Lack of association between angiotensin I-converting enzyme gene deletion polymorphism and cerebrovascular disease in Taiwanese. J Formos Med Assoc 2000; 99:895-901. [PMID: 11155741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
BACKGROUND AND PURPOSE Angiotensin I-converting enzyme (ACE) gene deletion polymorphism (D) has recently been suggested as a significant risk factor for cerebrovascular disease in studies involving Japanese and white populations. We investigated the role of ACE D polymorphism in the pathogenesis of cerebrovascular disease in Taiwanese. METHODS To examine the association of ACE genotype and allele frequency with cerebrovascular disease, we conducted a study of 306 stroke patients and 300 control subjects matched by age and sex. RESULTS Although the frequencies of both the homozygous deletion (DD) genotype and the D allele were greater in stroke patients than in control subjects, these differences were not significant. Further comparison of the frequencies of the DD genotype and the D allele in the three stroke subgroups (intracerebral hemorrhage, probable large-vessel disease, and probable small-vessel lacunar infarction) with the control group revealed no significant associations. Moreover, ACE gene polymorphism was not significantly associated with age of onset of stroke. Stepwise logistic regression analysis of the presence of the D allele and data on risk factors confirmed the lack of significant association between ACE deletion polymorphism and cerebrovascular disease. Moreover, no association was identified between ACE genotypes and any of the relative risk factors for cerebral infarction or severity of carotid atherosclerosis. CONCLUSIONS Our results suggest that deletion polymorphism of the ACE gene is not associated with the pathogenesis of cerebrovascular disease in Taiwanese.
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Affiliation(s)
- J J Lin
- Department of Neurology, Chushang Show-Chwan Hospital, Nantou, Taiwan
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15
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Lin JJ, Yueh KC, Chang DC, Lin SZ. Absence of G209A and G88C mutations in the alpha-synuclein gene of Parkinson's disease in a Chinese population. Eur Neurol 1999; 42:217-20. [PMID: 10567818 DOI: 10.1159/000008110] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A G209A mutation in the alpha-synuclein gene was recently discovered in a large Italian kindred and three unrelated Greek kindreds with autosomal dominant Parkinson's disease (PD). Subsequently, another mutation in the gene (G88C) was also identified in a German family with autosomal PD. These results indicate that the alpha-synuclein gene may have an important role in the pathogenesis of PD. This study was designed to screen the existence of both mutations of the alpha-synuclein gene among 100 Chinese patients with PD, including 80 with sporadic and 20 with familial PD. Results showed that none of our patients, both sporadic and familial PD, had either of the two mutations of this gene. We therefore conclude that although of great interest, these two mutations are not relevant for the pathogenesis of PD in a Han Chinese population.
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Affiliation(s)
- J J Lin
- Department of Neurology, Parkinson's Disease and Movement Disorders Clinic, Chushang Show-Chwan Hospital, Nantou, Taiwan, ROC.
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Lin JJ, Yueh KC, Harn HJ, Chang DC, Chang CY, Yeh YH. Lack of association between deletion polymorphism of the ACE gene and ischemic vascular diseases in a Chinese population in Taiwan. Zhonghua Yi Xue Za Zhi (Taipei) 1999; 62:756-63. [PMID: 10575803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
BACKGROUND The association between deletion/insertion polymorphism of the angiotensin I-converting enzyme (ACE) gene and ischemic vascular diseases (IVDs) is still unclear. This study was designed to evaluate the role of ACE gene polymorphism in the pathogenesis of IVDs in a Chinese population living in Taiwan. METHODS A case-control study was carried out to examine the association of the ACE gene genotype and the allele frequency in 400 IVD patients, including 214 patients with ischemic cerebrovascular disease (ICVD) and 186 patients with ischemic heart disease (IHD), compared with 200 control individuals. RESULTS Although the patients with ICVD and IHD were found to have higher frequencies of the D/D genotype (22% and 43%) and the D allele (20% and 42%) than the controls (16% and 39%), the statistical differences were not significant, as shown by chi 2 analysis (p > 0.05). Upon further comparison of the frequencies of the D allele among the two sexes and different age subgroups, there was still no significant association. CONCLUSIONS Deletion polymorphism of the ACE gene was not associated with IVD in a Chinese population in Taiwan. The unique or synergistic effect of other genes that might contribute to the pathogenesis of IVDs needs further investigation.
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Affiliation(s)
- J J Lin
- Department of Neurology, Chushang Show-Chwan Hospital, Nantou, Taiwan, ROC
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Abstract
The potential human metastasis molecule CD44 and its isoforms V5 and V6 are overexpressed in human gastric carcinoma. Among the numerous extracellular matrix components, hyaluronate, a CD44 ligand, is of increasing interest in relation to its role in cancer cell development and invasion. By using the dynabead separation method, the SC-M1 cell line was separated into V5 and V6 isoform-positive and -negative populations. The V5 and V6 isoform-negative populations exhibited significantly higher hyaluronate binding activity than the corresponding positive cells. The hyaluronate binding activity of V5 and V6-positive cells could be restored by pretreatment with anti-CD44 V5 and V6 monoclonal antibodies (MAbs). In addition, transfection of aVV5 and V6-negative cells decreased their hyaluronate binding activity to the levels of CD44 V5 and V6-positive cells. Cells transfected with V5 and V6 recovered their hyaluronate binding activity after pretreatment with MAbs against V5 and V6. These data suggest that cell adhesion involving hyaluronate can be regulated by multiple mechanisms, one of which involves alternative splicing of CD44 isoforms.
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Affiliation(s)
- H J Harn
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
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Abstract
The potential human metastasis molecule CD44 and its isoforms V5 and V6 are overexpressed in human gastric carcinoma. Among the numerous extracellular matrix components, hyaluronate, a CD44 ligand, is of increasing interest in relation to its role in cancer cell development and invasion. By using the dynabead separation method, the SC-M1 cell line was separated into V5 and V6 isoform-positive and -negative populations. The V5 and V6 isoform-negative populations exhibited significantly higher hyaluronate binding activity than the corresponding positive cells. The hyaluronate binding activity of V5 and V6-positive cells could be restored by pretreatment with anti-CD44 V5 and V6 monoclonal antibodies (MAbs). In addition, transfection of aVV5 and V6-negative cells decreased their hyaluronate binding activity to the levels of CD44 V5 and V6-positive cells. Cells transfected with V5 and V6 recovered their hyaluronate binding activity after pretreatment with MAbs against V5 and V6. These data suggest that cell adhesion involving hyaluronate can be regulated by multiple mechanisms, one of which involves alternative splicing of CD44 isoforms.
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Affiliation(s)
- H J Harn
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
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Jeng JR, Harn HJ, Yueh KC, Jeng CY, Shieh SM. Plasminogen activator inhibitor-1 and angiotensin I converting enzyme gene polymorphism in patients with hypertension. Am J Hypertens 1998; 11:235-9. [PMID: 9524054 DOI: 10.1016/s0895-7061(97)00476-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Deletion polymorphism of angiotensin I-converting enzyme (ACE) gene has been reported to be an independent risk factor for myocardial infarction. Plasminogen activator inhibitor-1 (PAI-1) was proposed to be a link between the renin-angiotensin system and thrombotic risk. This study was undertaken to investigate the possible association between the insertion/deletion (I/D) polymorphism of the ACE gene and plasma PAI-1 levels in 160 patients with mild-to-moderate hypertension. The I/D genotypes were determined by polymerase chain reaction with oligonucleotide primers flanking the polymorphic region in intron 16 of the ACE gene. Baseline levels of PAI-1 antigen and activity and tissue plasminogen activator (t-PA) antigen were determined in fasting morning plasma samples. It was found that patients with homozygote deletion (DD, n = 37) ACE genotype did not have significantly higher plasma levels of PAI-1 antigen (31.2 +/- 15.6 ng/mL v 28.4 +/- 15.1 ng/mL or 27.2 +/- 13.2 ng/mL, P = .42), PAI-1 activity (16.2 +/- 10.6 IU/mL v 14.1 +/- 9.4 IU/ mL or 15.0 +/- 9.9 IU/mL, P = .60), or t-PA antigen (14.6 +/- 6.0 ng/mL v 13.4 +/- 4.9 ng/mL or 14.6 +/- 5.7 ng/mL, P = .40) as compared to those with heterozygote (DI, n = 67) or homozygote insertion (II, n = 56) genotypes. On multiple regression analysis, the ACE genotypes did not appear to be significant predictors for plasma PAI-1 levels and t-PA antigen after adjustment with age, sex, body mass index, plasma triglyceride, cholesterol, and glucose. In conclusion, the results indicated that the I/D polymorphism of the ACE gene was not related to plasma PAI-1 levels in a Chinese population with hypertension. The ACE genotypes may not have a role in influencing the fibrinolysis in hypertension.
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Affiliation(s)
- J R Jeng
- Division of Cardiology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
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Harn HJ, Shen KL, Yueh KC, Ho LI, Yu JC, Chiu SC, Lee WH. Apoptosis occurs more frequently in intraductal carcinoma than in infiltrating duct carcinoma of human breast cancer and correlates with altered p53 expression: detected by terminal-deoxynucleotidyl-transferase-mediated dUTP-FITC nick end labelling (TUNEL). Histopathology 1997; 31:534-9. [PMID: 9447384 DOI: 10.1046/j.1365-2559.1997.3270906.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AIMS We examined the relationship between apoptosis and three different major stages of human breast carcinoma: intraductal carcinoma (DCIS), infiltrating duct carcinoma (IDC) and metastatic carcinoma in lymph nodes. We also determined the correlation between apoptosis and oestrogen receptor (ER), progesterone receptor (PR) and p53. METHODS AND RESULTS The study investigates the extent of apoptosis in 63 breast carcinomas by in-situ end-labelling, in formalin-fixed, paraffin-processed tissue sections. The 63 breast carcinomas, included 22 DCISs, 26 IDCs, three infiltrating lobular carcinomas (ILC) and 12 metastatic lymph nodes. The apoptotic labelling index was higher in DCIS than IDC and metastatic carcinoma (P < 0.001, P < 0.007, respectively). By immunohistochemistry, we also analysed p53, ER and PR. Apoptosis correlated significantly with p53 (r = 0.748, P = 0.0004) in IDC. Also, ER correlated significantly with PR (r = 0.629, P = 0.00001). No apparent correlation was found between the apoptosis and ER or PR. CONCLUSION Our data suggest that not only does apoptosis differ between intraductal carcinoma and infiltrating carcinoma but also it might be regulated by altered p53 expression.
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MESH Headings
- Apoptosis
- Breast Neoplasms/chemistry
- Breast Neoplasms/pathology
- Carcinoma, Ductal, Breast/chemistry
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Intraductal, Noninfiltrating/chemistry
- Carcinoma, Intraductal, Noninfiltrating/pathology
- Carcinoma, Lobular/chemistry
- Carcinoma, Lobular/pathology
- DNA Nucleotidylexotransferase
- Deoxyuracil Nucleotides
- Fluorescein-5-isothiocyanate
- Genetic Techniques
- Humans
- Immunohistochemistry
- Lymphatic Metastasis
- Middle Aged
- Tumor Suppressor Protein p53/biosynthesis
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Affiliation(s)
- H J Harn
- Department of Pathology, Tri-Service General Hospital, Taipei, Taiwan, Republic of China
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Harn HJ, Shen KL, Ho LI, Yu KW, Liu GC, Yueh KC, Lee JH. Evidence of transmission of Mycobacterium tuberculosis by random amplified polymorphic DNA (RAPD) fingerprinting in Taipei City, Taiwan. J Clin Pathol 1997; 50:505-8. [PMID: 9378819 PMCID: PMC499989 DOI: 10.1136/jcp.50.6.505] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AIMS To determine, by strain identification of Mycobacterium tuberculosis, whether transmission has occurred between individuals or whether new strains are present. METHODS A rapid protocol for random amplified polymorphic DNA (RAPD) analysis was developed. This protocol was applied to 64 strains of M tuberculosis that had been confirmed by culture and microbiological methods. RESULTS There are five groups of M tuberculosis prevalent in Taipei city, Taiwan. The major types are groups I and III. Groups I and II had been prevalent until the end of last year when, according to our group analysis, they had been eradicated. However, group III was continuously present from the middle of 1995 to the middle of 1996, and group IV was present at the end of both years, which indicated that both groups were transmitted continuously. These clustered strains had demographic characteristics consistent with a finding of transmission tuberculosis. Also, there were 13 of 64 strains with unique RAPD fingerprints that were inferred to be due primarily to the reactivation of infection. In the drug resistance analysis, the major type represented included group III and part of group IV. CONCLUSIONS Our preliminary data imply, not only that the prevalence of M tuberculosis in Taipei city is due to transmission rather than reactivation, but that drug resistance also may play a role in tuberculosis transmission.
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Affiliation(s)
- H J Harn
- Department of Pathology, Tri-Service General Hospital, Taipei, Taiwan, Republic of China.
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Abstract
Reports from different ethnic populations failed to show consistent findings on the association of hypertension with insertion/deletion (I/D) polymorphism of the angiotensin I converting enzyme (ACE) gene. In this population association study in Chinese, we compared the distribution of the ACE genotypes and allele frequency in 150 healthy controls with normal blood pressure and 148 hypertensive patients categorized by age. Although the frequencies of homozygote deletion (DD) genotype and deletion allele were greater in Chinese with hypertension than in normotensive controls (0.23 vs 0.13 and 0.44 v 0.37, respectively), the differences were not significant by chi2 analysis (P = .07 and .09, respectively). Furthermore, we did not find the trend of decreasing number of DD genotype in older hypertensive Chinese patients. The results indicated a much lower prevalence of ACE/DD genotype in Chinese than in Caucasians and a modest association between I/D polymorphism of the ACE gene and hypertension in Chinese.
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Affiliation(s)
- J R Jeng
- Division of Cardiology, Tri-Service General Hospital, Taipei, Republic of China, Taiwan
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Yu DS, Yueh KC, Chang SY, Yang TH, Ma CP. The expression of ferritin on renal cancers and its relationship with cellular differentiation and tumour stage. Br J Urol 1995; 75:733-5. [PMID: 7613829 DOI: 10.1111/j.1464-410x.1995.tb07381.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVES To investigate ferritin expression in renal carcinoma and the correlation of expression with tumour differentiation and stage. PATIENTS AND METHODS Ferritin was immunohistologically detected in 35 patients (23 men and 12 women; mean age 58.2 years, range 40-82) with renal carcinoma and the findings compared with cellular type, tumour stage and the ferritin expression of a similar control population of 16 patients. RESULTS The incidence of ferritin expression in renal carcinomas was 51%. Expression was significantly related to tumour stage and not cellular type. CONCLUSION The results of this study re-emphasize the high expression of ferritin in renal cell carcinoma and the correlation of expression with tumour behaviour.
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Affiliation(s)
- D S Yu
- Department of Surgery, Tri-Service General Hospital, Taipei, Taiwan, Republic of China
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