1
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Dehghani N, Bras J, Guerreiro R. How understudied populations have contributed to our understanding of Alzheimer's disease genetics. Brain 2021; 144:1067-1081. [PMID: 33889936 DOI: 10.1093/brain/awab028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/30/2020] [Accepted: 11/17/2020] [Indexed: 12/14/2022] Open
Abstract
The majority of genome-wide association studies have been conducted using samples with a broadly European genetic background. As a field, we acknowledge this limitation and the need to increase the diversity of populations studied. A major challenge when designing and conducting such studies is to assimilate large samples sizes so that we attain enough statistical power to detect variants associated with disease, particularly when trying to identify variants with low and rare minor allele frequencies. In this review, we aimed to illustrate the benefits to genetic characterization of Alzheimer's disease, in researching currently understudied populations. This is important for both fair representation of world populations and the translatability of findings. To that end, we conducted a literature search to understand the contributions of studies, on different populations, to Alzheimer's disease genetics. Using both PubMed and Alzforum Mutation Database, we systematically quantified the number of studies reporting variants in known disease-causing genes, in a worldwide manner, and discuss the contributions of research in understudied populations to the identification of novel genetic factors in this disease. Additionally, we compared the effects of genome-wide significant single nucleotide polymorphisms across populations by focusing on loci that show different association profiles between populations (a key example being APOE). Reports of variants in APP, PSEN1 and PSEN2 can initially determine whether patients from a country have been studied for Alzheimer's disease genetics. Most genome-wide significant associations in non-Hispanic white genome-wide association studies do not reach genome-wide significance in such studies of other populations, with some suggesting an opposite effect direction; this is likely due to much smaller sample sizes attained. There are, however, genome-wide significant associations first identified in understudied populations which have yet to be replicated. Familial studies in understudied populations have identified rare, high effect variants, which have been replicated in other populations. This work functions to both highlight how understudied populations have furthered our understanding of Alzheimer's disease genetics, and to help us gauge our progress in understanding the genetic architecture of this disease in all populations.
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Affiliation(s)
- Nadia Dehghani
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA
| | - Jose Bras
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA.,Division of Psychiatry and Behavioral Medicine, Michigan State University College of Human Medicine, Grand Rapids, MI, USA
| | - Rita Guerreiro
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, Michigan, USA.,Division of Psychiatry and Behavioral Medicine, Michigan State University College of Human Medicine, Grand Rapids, MI, USA
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2
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Zeng FF, Liu J, He H, Gao XP, Liao MQ, Yu XX, Liu YH, Zhu S, Jing CX. Association of PICALM Gene Polymorphisms with Alzheimer's Disease: Evidence from an Updated Meta-Analysis. Curr Alzheimer Res 2020; 16:1196-1205. [PMID: 31385771 DOI: 10.2174/1567205016666190805165607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 07/12/2019] [Accepted: 07/22/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Previous studies have examined the roles of three polymorphisms (rs3851179, rs541458, and rs592297) of the PICALM gene in susceptibility to Alzheimer's disease (AD) with inconclusive findings. OBJECTIVE We performed a meta-analysis to explore whether these three polymorphisms in the PICALM gene were associated with susceptibility to AD. METHODS Bibliographical searches were conducted in the PubMed, Embase, Web of Science, and China National Knowledge Infrastructure (CNKI) databases. Summary Odds Ratios (ORs) with 95% Confidence Intervals (CIs) were used to assess the strength of association in a random effects model. Potential sources of heterogeneity were identified by subgroup and meta-regression analyses. RESULTS Twenty studies (9,017 cases and 15,448 controls) on rs3851179, 12 studies (8,077 cases and 12,022 controls) on rs541458, and 4 studies (2,106 cases and 2,234 controls) on rs592297 were considered eligible for meta-analyses. For both rs3851179 and rs541458, the overall ORs were significant under all genetic models with mild heterogeneity. Compared with G carriers, A carriers of rs3851179 were associated with a decreased risk of AD (OR = 0.88; 95% CI 0.84, 0.91, P for Z-test <0.001, I2 = 0.0%). Compared with T carriers, C carriers of rs541458 were inversely associated with AD risk (OR = 0.86; 95% CI 0.81, 0.92, P for Z-test <0.001, I2 = 39.5%). No association was observed for rs592297. Subgroup and meta-regression analyses indicated that the protective effect of the rs541458 C allele was observed only among Caucasians, not among Asians (P for interaction: 0.021~<0.001). CONCLUSION rs3851179 and rs541458 appear to be associated with decreased AD risk. The null associations for rs592297 with AD risk need further confirmation with a larger number of participants.
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Affiliation(s)
- Fang-Fang Zeng
- Department of Epidemiology, School of Medicine, Jinan University, Guangzhou 510630, China
| | - Jun Liu
- Department of preventive medicine laboratory, School of Public Health, Zunyi Medical University, Zunyi, 563006, China
| | - Hong He
- Health Care and Physical Examination Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
| | - Xu-Ping Gao
- Department of Epidemiology, School of Medicine, Jinan University, Guangzhou 510630, China
| | - Min-Qi Liao
- Department of Epidemiology, School of Medicine, Jinan University, Guangzhou 510630, China
| | - Xiao-Xuan Yu
- Department of Epidemiology, School of Medicine, Jinan University, Guangzhou 510630, China
| | - Yan-Hua Liu
- The First Affiliated Hospital of Zhengzhou University, No. 1 East Jianshe Road, Zhengzhou 450052, Henan, China
| | - Sui Zhu
- Department of Medical Statistics, School of Medicine, Jinan University, No.601 Huangpu Road West, Guangzhou 510632, Guangdong, China
| | - Chun-Xia Jing
- Department of Epidemiology, School of Medicine, Jinan University, Guangzhou 510630, China.,Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, Guangdong, China
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3
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Yang Y, Wang X, Ju W, Sun L, Zhang H. Genetic and Expression Analysis of COPI Genes and Alzheimer's Disease Susceptibility. Front Genet 2019; 10:866. [PMID: 31608112 PMCID: PMC6761859 DOI: 10.3389/fgene.2019.00866] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 08/19/2019] [Indexed: 11/13/2022] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disease in the elderly and the leading cause of dementia in humans. Evidence shows that cellular trafficking and recycling machineries are associated with AD risk. A recent study found that the coat protein complex I (COPI)-dependent trafficking in vivo could significantly reduce amyloid plaques in the cortex and hippocampus of neurological in the AD mouse models and identified 12 single-nucleotide polymorphisms in COPI genes to be significantly associated with increased AD risk using 6,795 samples. Here, we used a large-scale GWAS dataset to investigate the potential association between the COPI genes and AD susceptibility by both SNP and gene-based tests. The results showed that only rs9898218 was associated with AD risk with P = 0.017. We further conducted an expression quantitative trait loci (eQTLs) analysis and found that rs9898218 G allele was associated with increased COPZ2 expression in cerebellar cortex with P = 0.0184. Importantly, the eQTLs analysis in whole blood further indicated that 11 of these 12 genetic variants could significantly regulate the expression of COPI genes. Hence, these findings may contribute to understand the association between COPI genes and AD susceptibility.
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Affiliation(s)
- Yu Yang
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, China
| | - Xu Wang
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, China
| | - Weina Ju
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, China
| | - Li Sun
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, China
| | - Haining Zhang
- Department of Neurology and Neuroscience Center, First Hospital of Jilin University, Changchun, China
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4
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Yang Q, Chen K, Zhang H, Zhang W, Gong C, Zhang Q, Liu P, Sun T, Xu Y, Qian X, Qiu W, Ma C. Correlations Between Single Nucleotide Polymorphisms, Cognitive Dysfunction, and Postmortem Brain Pathology in Alzheimer's Disease Among Han Chinese. Neurosci Bull 2019; 35:193-204. [PMID: 30783964 DOI: 10.1007/s12264-019-00343-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/01/2018] [Indexed: 12/14/2022] Open
Abstract
In this study, the distribution of five Alzheimer's disease (AD)-related single nucleotide polymorphisms (SNPs) in the Han population was examined in combination with the evaluation of clinical cognition and brain pathological analysis. The associations among SNPs, clinical daily cognitive states, and postmortem neuropathological changes were analyzed in 110 human brains from the Chinese Academy of Medical Sciences/Peking Union Medical College (CAMS/PUMC) Human Brain Bank. APOE ε4 (OR = 4.482, P = 0.004), the RS2305421 GG genotype (adjusted OR = 4.397, P = 0.015), and the RS10498633 GT genotype (adjusted OR = 2.375, P = 0.028) were associated with a higher score on the ABC (Aβ plaque score, Braak NFT stage, and CERAD neuritic plaque score) dementia scale. These results advance our understanding of the pathogenesis of AD, the relationship between pathological diagnosis and clinical diagnosis, and the SNPs in the Han population for future research.
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Affiliation(s)
- Qian Yang
- Institute of Basic Medical Sciences, Department of Human Anatomy, Histology and Embryology, Neuroscience Center, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China.,Joint Laboratory of Anesthesia and Pain, Peking Union Medical College, Beijing, 100005, China
| | - Kang Chen
- Joint Laboratory of Anesthesia and Pain, Peking Union Medical College, Beijing, 100005, China.,Eight-Year MD Program, Peking Union Medical College, Beijing, 100730, China
| | - Hanlin Zhang
- Joint Laboratory of Anesthesia and Pain, Peking Union Medical College, Beijing, 100005, China.,Eight-Year MD Program, Peking Union Medical College, Beijing, 100730, China
| | - Wanying Zhang
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, 21205, USA
| | - Changlin Gong
- Joint Laboratory of Anesthesia and Pain, Peking Union Medical College, Beijing, 100005, China.,Eight-Year MD Program, Peking Union Medical College, Beijing, 100730, China
| | - Qing Zhang
- Institute of Basic Medical Sciences, Department of Human Anatomy, Histology and Embryology, Neuroscience Center, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China.,Joint Laboratory of Anesthesia and Pain, Peking Union Medical College, Beijing, 100005, China
| | - Pan Liu
- Institute of Basic Medical Sciences, Department of Human Anatomy, Histology and Embryology, Neuroscience Center, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China.,Joint Laboratory of Anesthesia and Pain, Peking Union Medical College, Beijing, 100005, China
| | - Tianyi Sun
- Institute of Basic Medical Sciences, Department of Human Anatomy, Histology and Embryology, Neuroscience Center, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China.,Joint Laboratory of Anesthesia and Pain, Peking Union Medical College, Beijing, 100005, China
| | - Yuanyuan Xu
- National Experimental Teaching Demonstration Center of Basic Medicine, Peking Union Medical College, Beijing, 100005, China
| | - Xiaojing Qian
- Institute of Basic Medical Sciences, Department of Human Anatomy, Histology and Embryology, Neuroscience Center, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China
| | - Wenying Qiu
- Institute of Basic Medical Sciences, Department of Human Anatomy, Histology and Embryology, Neuroscience Center, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China.
| | - Chao Ma
- Institute of Basic Medical Sciences, Department of Human Anatomy, Histology and Embryology, Neuroscience Center, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China.
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5
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Liu G, Zhang Y, Wang L, Xu J, Chen X, Bao Y, Hu Y, Jin S, Tian R, Bai W, Zhou W, Wang T, Han Z, Zong J, Jiang Q. Alzheimer's Disease rs11767557 Variant Regulates EPHA1 Gene Expression Specifically in Human Whole Blood. J Alzheimers Dis 2019; 61:1077-1088. [PMID: 29332039 DOI: 10.3233/jad-170468] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Large-scale genome-wide association studies have reported EPHA1 rs11767557 variant to be associated with Alzheimer's disease (AD) risk in the European population. However, it is still unclear how this variant functionally contributes to the underlying disease pathogenesis. The rs11767557 variant is located approximately 3 kb upstream of EPHA1 gene. We think that rs11767557 may modify the expression of nearby genes such as EPHA1 and further cause AD risk. Until now, the potential association between rs11767557 and the expression of nearby genes has not been reported in previous studies. Here, we evaluate the potential expression association between rs11767557 and EPHA1 using multiple large-scale eQTLs datasets in human brain tissues and the whole blood. The results show that rs11767557 variant could significantly regulate EPHA1 gene expression specifically in human whole blood. These findings may further provide important supplementary information about the regulating mechanisms of rs11767557 variant in AD risk.
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Affiliation(s)
- Guiyou Liu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Yan Zhang
- Department of Pathology, The Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Longcai Wang
- Department of Anesthesiology, The Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Jianyong Xu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, China
| | - Xiaoyun Chen
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, China
| | - Yunjuan Bao
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, China
| | - Yang Hu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Shuilin Jin
- Department of Mathematics, Harbin Institute of Technology, Harbin, China
| | - Rui Tian
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Weiyang Bai
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Wenyang Zhou
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Tao Wang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Zhifa Han
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Jian Zong
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Qinghua Jiang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
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6
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Huang WH, Chen W, Jiang LY, Yang YX, Yao LF, Li KS. Influence of ADAM10 Polymorphisms on Plasma Level of Soluble Receptor for Advanced Glycation End Products and The Association With Alzheimer's Disease Risk. Front Genet 2018; 9:540. [PMID: 30555509 PMCID: PMC6282062 DOI: 10.3389/fgene.2018.00540] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 10/25/2018] [Indexed: 12/11/2022] Open
Abstract
To determine the role of A disintegrin and metalloproteinase 10 (ADAM10) in genetic susceptibility to Alzheimer's disease (AD) in a representative Chinese sample, we genotyped 362 AD patients and 370 healthy controls for the rs514049A/C and rs653765C/T polymorphisms in the ADAM10 promoter using the SNaPshot technique. We also examined the potential impact of these polymorphisms on the plasma level of soluble receptor for advanced glycation end products (sRAGE), a decoy receptor whose reduction has been associated with a higher risk of AD. Additionally, a meta-analysis was performed using the present study and the largest GWAS from the International Genomics of Alzheimer's Project (IGAP). No significant differences were found in the distributions of genotypes or alleles between AD patients and control subjects. However, age-at-onset stratification analysis revealed that there were significant differences in the genotypes (P = 0.015) and alleles (P = 0.006) of the rs653765 SNP. Furthermore, patients with the rs653765 CC genotype showed a lower ADAM10 level and a faster cognitive deterioration than those in patients with the CT/TT genotype in late-onset AD (LOAD), and the rs653765 CC polymorphism was able to regulate the production of the ADAM10 substrate sRAGE. In contrast, the rs514049 polymorphism was not statistically associated with AD. In the meta-analysis, we observed that both rs514049 (A allele vs. C allele, P = 0.002) and rs653765 (C allele vs. T allele, P = 0.004) were associated with AD risk. The present study indicated that the rs653765 polymorphism might be associated with the risk and development of LOAD; in particular, the risk genotype, CC, may decrease the expression of ADAM10, influencing the plasma levels of sRAGE, and thus may be correlated with the clinical progression of AD.
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Affiliation(s)
- Wen-Hui Huang
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, China.,Clinical Neuroscience Institute of Jinan University, Guangzhou, China
| | - Wei Chen
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, China.,Clinical Neuroscience Institute of Jinan University, Guangzhou, China
| | - Lian-Ying Jiang
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
| | - Yi-Xia Yang
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
| | - Li-Fen Yao
- Department of Neurology, The First Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Ke-Shen Li
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, China.,Clinical Neuroscience Institute of Jinan University, Guangzhou, China
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7
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Cai Q, Xin Z, Zuo L, Li F, Liu B. Alzheimer's Disease and Rheumatoid Arthritis: A Mendelian Randomization Study. Front Neurosci 2018; 12:627. [PMID: 30258348 PMCID: PMC6143656 DOI: 10.3389/fnins.2018.00627] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 08/21/2018] [Indexed: 01/08/2023] Open
Abstract
Alzheimer’s disease (AD) is the most common neurodegenerative disease. In recent years, multiple pathway analyses of AD genome-wide association studies (GWAS) have been conducted, and provided strong support for immune pathways in AD. Rheumatoid arthritis (RA) is a chronic autoimmune disease. It is reported that antirheumatic drugs had protective effect on dementia in RA patients. However, observational studies have reported a controversial inverse relationship between AD and RA. In addition, Mendelian randomization studies have also been performed to evaluate the association of RA with AD. However, these studies reported inconsistent association of RA with AD. Until now, it is still unclear that AD is a causally associated with RA. Here, we performed a Mendelian randomization study to investigate the causal association of AD with RA. We analyzed the large-scale AD GWAS dataset (74,046 individuals) and RA GWAS dataset (58,284 individuals) from the European descent. However, we did not identify any significant association of AD with RA using inverse-variance weighted meta-analysis (IVW), weighted median regression and MR-Egger regression.
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Affiliation(s)
- Qixuan Cai
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Basic Medical Science, Jilin University, Changchun, China
| | - Zhuoyuan Xin
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Basic Medical Science, Jilin University, Changchun, China
| | - Lin Zuo
- Department of Anesthesiology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Fan Li
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Basic Medical Science, Jilin University, Changchun, China
| | - Bin Liu
- Center of Cardiovascular Disease, The First Hospital of Jilin University, Changchun, China
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8
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Dubey H, Gulati K, Ray A. Recent studies on cellular and molecular mechanisms in Alzheimer’s disease: focus on epigenetic factors and histone deacetylase. Rev Neurosci 2018; 29:241-260. [DOI: 10.1515/revneuro-2017-0049] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 08/28/2017] [Indexed: 01/06/2023]
Abstract
AbstractAlzheimer’s disease (AD) is one of the most common neurodegenerative disorders mainly affecting elderly people. It is characterized by progressive loss of memory and cognitive function. More than 95% of AD cases are related to sporadic or late-onset AD (LOAD). The etiology of LOAD is still unclear. It has been reported that environmental factors and epigenetic alterations play a significant role in AD pathogenesis. Furthermore, recently, genome-wide association studies (GWAS) identified 10 novel risk genes:ABCA7,APOE,BIN1,CD2AP,CD33,CLU,CR1,MS4A6A,MS4A4E, andPICALM, which play an important role for LOAD. In this review, the therapeutic approaches of AD by epigenetic modifications have been discussed. Nowadays, HDAC inhibitors have clinically proven its activity for epigenetic modifications. Furthermore, we try to establish the relationship between HDAC inhibitors and above mentioned LOAD risk genes. Finally, we are hoping that this review may open new area of research for AD treatment.
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9
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Han P, Liu G, Lu X, Cao M, Yan Y, Zou J, Li X, Wang G. CDH1 rs9929218 variant at 16q22.1 contributes to colorectal cancer susceptibility. Oncotarget 2018; 7:47278-47286. [PMID: 27259261 PMCID: PMC5216941 DOI: 10.18632/oncotarget.9758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 05/08/2016] [Indexed: 12/11/2022] Open
Abstract
Colorectal cancer (CRC) is the third most common cancer. Large-scale genome-wide association studies (GWAS) have been performed and reported some novel CRC susceptibility variants in European ancestry including the CDH1 rs9929218. Following GWAS and candidate studies evaluated the association between the CDH1 rs9929218 polymorphism and CRC in European, Asian and American populations. However, these studies reported inconsistent associations. Evidence shows that rs9929218 may regulate different gene expressions in different human tissues. Here, we reevaluated this association using large-scale samples from 16 studies (n=131768) using a meta-analysis method. In heterogeneity test, we did not identify significant heterogeneity among these studies. Meta-analysis using fixed effect model showed significant association between rs9929218 and CRC (P=6.16E-21, odds ratio (OR) =0.92, 95% confidence interval (CI) 0.91-0.94). In order to validate the effect of rs9929218 variant on CDH1 expression, we further performed a functional analysis using two large-scale expression datasets. We identified significant regulation relation between rs9929218 variant and the expression of CDH1, ZFP90, RP11-354M1.2 and MCOLN2 by both cis-effect and trans-effect. In summary, our analysis highlights significant association between rs9929218 polymorphism and CRC susceptibility.
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Affiliation(s)
- Peng Han
- Department of Colorectal Surgery, The Affiliated Tumor Hospital of Harbin Medical University, Harbin, 150040, China
| | - Guiyou Liu
- Genome Analysis Laboratory, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Xin Lu
- Department of Gastroenterology, The First Hospital of Harbin, Harbin, 150001, China
| | - Minmin Cao
- Department of Endocrinology, The First Hospital of Harbin, Harbin, 150001, China
| | - Youling Yan
- Department of Gastroenterology, The First Hospital of Harbin, Harbin, 150001, China
| | - Jing Zou
- Department of Hematology, The First Hospital of Harbin, Harbin, 150001, China
| | - Xiaobo Li
- Department of Pathology, Harbin Medical University, Harbin, 150081, China
| | - Guangyu Wang
- Department of Gastrointestinal Medical Oncology, The Affiliated Tumor Hospital of Harbin Medical University, Harbin, 150040, China
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10
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Wu QJ, Sun SY, Yan CJ, Cheng ZC, Yang MF, Li ZF, Cheng HW, Fang TK. EXOC3L2 rs597668 variant contributes to Alzheimer's disease susceptibility in Asian population. Oncotarget 2017; 8:20086-20091. [PMID: 28423615 PMCID: PMC5386745 DOI: 10.18632/oncotarget.15380] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 01/11/2017] [Indexed: 12/12/2022] Open
Abstract
Recent genome-wide association studies have established the association between EXOC3L2 rs597668 variant and Alzheimer's disease (AD) in European population. However, recent studies reported inconsistent results in Asian population. Here, we performed a systematic review and meta-analysis to evaluate the impact of rs597668 on AD risk in Asian population using a total of 8686 samples including 2855 cases and 5831 controls. Meanwhile, we selected 17,008 AD cases and 37,154 controls in European population to evaluate the potential heterogeneity between East Asian and European populations. In East Asian population, we identified no potential heterogeneity with P=0.31 and I2 = 15.8%. By meta-analysis, we identified positive association between rs597668 and AD risk with P=0.023, OR=0.93, 95% CI 0.87-0.99. We further found significant heterogeneity in pooled Asian and European populations with P<0.0001 and I2 = 87.7%. The meta-analysis indicated negative association with P=0.66, OR=0.97, 95% CI 0.85-1.11. In summary, all these findings indicate that rs597668 C allele is a risk factor for AD in European population with OR=1.18 and P=2.49E-13. However the rs597668 C allele played a protective role in AD with OR=0.93 and P=0.023 in East Asian population.
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Affiliation(s)
- Qing-Jian Wu
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China.,Department of Neurology, Shandong University School of Medicine, Jinan, Shandong, 250012, China.,Key Lab of Cerebral Microcirculation in Universities of Shandong, Taishan Medical University, Taian, Shandong, 271000, China
| | - Shu-Yin Sun
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China
| | - Cheng-Jun Yan
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China
| | - Zi-Cui Cheng
- Department of Encephalopathy Rehabiliation Center, Taian Traditional Chinese Medical Hospital, Taian, Shandong, 271000, China
| | - Ming-Feng Yang
- Key Lab of Cerebral Microcirculation in Universities of Shandong, Taishan Medical University, Taian, Shandong, 271000, China
| | - Zi-Fei Li
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China
| | - Hou-Wen Cheng
- Key Lab of Cerebral Microcirculation in Universities of Shandong, Taishan Medical University, Taian, Shandong, 271000, China
| | - Ti-Kun Fang
- Department of Emergency, Jining No. 1 People's Hospital, Jining, Shandong, 272011, China
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11
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Zhang C, Li X, Zhang W, Wang Y, Fan G, Wang W, Chen S, Qin H, Zhang X. Common genetic variant rs3802842 in 11q23 contributes to colorectal cancer risk in Chinese population. Oncotarget 2017; 8:72227-72234. [PMID: 29069782 PMCID: PMC5641125 DOI: 10.18632/oncotarget.19702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 06/28/2017] [Indexed: 11/25/2022] Open
Abstract
A genome-wide association study identified a common genetic variant rs3802842 at 11q23 to be associated with CRC risk with OR=1.1 and P = 5.80E-10 in European population. In Chinese population, several genetic association studies have investigated the association between rs3802842 variant and CRC risk. However these studies reported both positive and negative association results. It is still necessary to evaluate a specific variant in a specific population, which would be informative to reveal the disease mechanism. Until recently, there is no a systemic study to evaluate the potential association between rs3802842 and CRC risk in Chinese population by a meta-analysis method. Here, we aim to evaluate this association in Chinese population by a meta-analysis method using 12077 samples including 5816 CRC cases and 6261 controls. We identified the T allele of rs3802842 to be significantly related with an increase CRC risk (P=2.22E-05, OR=1.14, 95% CI 1.07-1.21) in Chinese population.
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Affiliation(s)
- Chunze Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xichuan Li
- Department of Immunology, Biochemistry and Molecular Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin 300070, China
| | - Weihua Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Yijia Wang
- Department of Pathology, Tianjin Union Medical Center, Tianjin 300121, China
| | - Guanwei Fan
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China.,State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Wenhong Wang
- Department of Imaging, Tianjin Union Medical Center, Tianjin 300121, China
| | - Shuo Chen
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Hai Qin
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xipeng Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
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12
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Liu G, Sun JY, Xu M, Yang XY, Sun BL. SORL1 Variants Show Different Association with Early-Onset and Late-Onset Alzheimer’s Disease Risk. J Alzheimers Dis 2017; 58:1121-1128. [PMID: 28527213 DOI: 10.3233/jad-170005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Guiyou Liu
- Department of Neurology, Affiliated Hospital of Taishan Medical College, Key Laboratory of Cerebral Microcirculation in Universities of Shandong, Taian, Shandong, China
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Jing-yi Sun
- Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Gangwon, Korea
| | - Meiling Xu
- Department of Neurology, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, China
| | - Xiao-yi Yang
- Department of Neurology, Affiliated Hospital of Taishan Medical College, Key Laboratory of Cerebral Microcirculation in Universities of Shandong, Taian, Shandong, China
| | - Bao-liang Sun
- Department of Neurology, Affiliated Hospital of Taishan Medical College, Key Laboratory of Cerebral Microcirculation in Universities of Shandong, Taian, Shandong, China
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13
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Zhang C, Li X, Fu W, Wang Y, Wang T, Wang W, Chen S, Qin H, Zhang X. SMAD7 rs4939827 variant contributes to colorectal cancer risk in Chinese population. Oncotarget 2017; 8:41125-41131. [PMID: 28467803 PMCID: PMC5522279 DOI: 10.18632/oncotarget.17065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 03/11/2017] [Indexed: 01/10/2023] Open
Abstract
A genome-wide association study identified a common genetic variant rs4939827 at 18q21 in SMAD7 to be related with colorectal cancer (CRC) risk with OR=1.2 and P =7.80E-28. Until recently, several meta-analysis studies have been conducted, and reported significant association between rs4939827 and CRC risk. However none of these studies evaluated the potential association between rs4939827 and CRC risk in Chinese population. In this study, we evaluated this association by a meta-analysis using 12077 samples including 5816 CRC cases and 6261 controls. In the end, we identified the T allele of rs4939827 to be significantly related with an increase CRC risk (P=2.22E-05, OR=1.14, 95% CI 1.07-1.21) in Chinese population.
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Affiliation(s)
- Chunze Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xichuan Li
- Department of Immunology, Biochemistry and Molecular Biology, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Medical Epigenetics, Tianjin Medical University, Tianjin 300070, China
| | - Wenzheng Fu
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Yijia Wang
- Department of Pathology, Tianjin Union Medical Center, Tianjin 300121, China
| | - Tao Wang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Wenhong Wang
- Department of Imaging, Tianjin Union Medical Center, Tianjin 300121, China
| | - Shuo Chen
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Hai Qin
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
| | - Xipeng Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin 300121, China
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14
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Hu Y, Zheng L, Cheng L, Zhang Y, Bai W, Zhou W, Wang T, Han Z, Zong J, Jin S, Zhang J, Liu G, Jiang Q. GAB2 rs2373115 variant contributes to Alzheimer's disease risk specifically in European population. J Neurol Sci 2017; 375:18-22. [PMID: 28320126 DOI: 10.1016/j.jns.2017.01.030] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/02/2017] [Accepted: 01/09/2017] [Indexed: 01/01/2023]
Abstract
A genome-wide association study identified GAB2 rs2373115 to be associated with Alzheimer's disease (AD) risk in European population. However, inconsistent results are reported in East Asian population. Here, we performed an updated analysis using 65,704 samples including 20,982 AD cases and 44,722 controls. First, we investigated the GAB2 rs2373115 variant in Asian population using 3974 AD cases and 7568 controls. To further evaluate the effect of rs2373115 in different populations, we selected 17,008 AD cases and 37,154 controls in European population. We used three genetic models, and found no significant heterogeneity in Asian population. A fixed effect model analysis showed no significant association between rs2373115 and AD in Asian population. There was no significant heterogeneity in the pooled East Asian and European populations. The fixed effect model analysis again showed no significant association between rs2373115 and AD in these pooled populations. Taken together, these findings suggest that GAB2 rs2373115 may contribute to AD susceptibility only in European population but not in East Asian population.
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Affiliation(s)
- Yang Hu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Likun Zheng
- School of Computer and Information Engineering, Harbin University of Commerce, Harbin, China
| | - Liang Cheng
- School of Computer Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Ying Zhang
- Department of pharmacy, Heilongjiang Province Land Reclamation Headquarters General Hospital, Harbin, China
| | - Weiyang Bai
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Wenyang Zhou
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Tao Wang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Zhifa Han
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Jian Zong
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Shuilin Jin
- Department of Mathematics, Harbin Institute of Technology, Harbin, China
| | - Jun Zhang
- Department of pharmacy, Heilongjiang Province Land Reclamation Headquarters General Hospital, Harbin, China.
| | - Guiyou Liu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China.
| | - Qinghua Jiang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China.
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15
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Li Y, Song D, Jiang Y, Wang J, Feng R, Zhang L, Wang G, Chen Z, Wang R, Jiang Q, Liu G. CR1 rs3818361 Polymorphism Contributes to Alzheimer's Disease Susceptibility in Chinese Population. Mol Neurobiol 2015; 53:4054-4059. [PMID: 26189835 DOI: 10.1007/s12035-015-9343-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 07/07/2015] [Indexed: 12/01/2022]
Abstract
Recent genome-wide association studies (GWAS) reported CR1 rs3818361 polymorphism to be an Alzheimer's disease (AD) susceptibility variant in European ancestry. Three independent studies investigated this association in Chinese population. However, these studies reported weak or no significant association. Here, we reinvestigated the association using all the samples from three independent studies in Chinese population (N = 4047, 1244 AD cases and 2803 controls). We also selected three independent studies in European ancestry population (N = 11787, 3939 AD cases and 7848 controls) to evaluate the effect of rs3818361 polymorphism on AD risk in different ethnic backgrounds. In Chinese population, we did not identified significant heterogeneity using additive, recessive, and dominant genetic models. Meta-analysis showed significant association between rs3818361 and AD with P = 6.00E-03 and P = 5.00E-03. We further identified no heterogeneity of rs3818361 polymorphism between Chinese and European populations. We found that rs3818361 polymorphism contributed to AD with similar genetic risk in Chinese and European populations. In summary, this is the first study to show significant association between rs3818361 polymorphism and AD in Chinese population by a meta-analysis method. Our findings indicate that the effect of CR1 rs3818361 polymorphism on AD risk in Chinese cohorts is consistent with the increased risk observed in European AD cohorts.
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Affiliation(s)
- Yongning Li
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Dongjing Song
- Department of Neurology, The Second Hospital of Harbin, Harbin, China
| | - Yongshuai Jiang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Jingwei Wang
- Department of Neurology, The Second Hospital of Harbin, Harbin, China
| | - Rennan Feng
- Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, China
| | - Liangcai Zhang
- Department of Statistics, Rice University, Houston, TX, USA
| | - Guangyu Wang
- Department of Oncology, The First Hospital of Harbin, Harbin, China
| | - Zugen Chen
- Department of Human Genetics, University of California at Los Angeles, Los Angeles, CA, USA
| | - Renzhi Wang
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China.
| | - Qinghua Jiang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150001, China.
| | - Guiyou Liu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China.
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16
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Wu P, Li HL, Liu ZJ, Tao QQ, Xu M, Guo QH, Hong Z, Sun YM. Associations between apolipoprotein E gene polymorphisms and Alzheimer's disease risk in a large Chinese Han population. Clin Interv Aging 2015; 10:371-8. [PMID: 25673977 PMCID: PMC4321568 DOI: 10.2147/cia.s73396] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Objective Apolipoprotein E gene (APOE) polymorphisms contributing to the risk of sporadic Alzheimer’s disease (AD) have been identified for decades, but it has not been investigated in large AD samples of Chinese Han population. Methods We performed a cross-sectional study to explore the effect of APOE polymorphisms on sporadic AD in 875 sporadic AD patients and 1,195 cognitive normal controls of Chinese Han. Genotyping of APOE was determined by multiplex amplification refractory mutation system polymerase chain reaction. Results APOE ε3ε4 and ε4ε4 genotypes increased AD risk with dosage effect. The odds ratio (OR) of ε3ε4 was 1.89 and the OR of ε4ε4 was 15.64 compared with that of ε3ε3 in all the subjects. E2ε3 genotype decreased AD risk in all the subjects (OR=0.64), female subgroup (OR=0.57), and late-onset AD subgroup (OR=0.60). However, neither ε2ε2 nor ε2ε4 affected AD risk. About the age at onset (AAO), the influence of APOE ε4 was only exhibited in late-onset AD subgroup, with 1 year lower in ε4-positive ones than negative ones. Further analysis did not show the dosage effect of ε4 pertinent to AAO, though the AAO of ε4ε4 patients decreased by 2 years. E2 did not affect the AAO of AD. Conclusion APOE ε4 is a strong risk factor of AD risk in Chinese Han population, and APOE ε4ε4 genotype might be related to the AAO of late-onset AD.
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Affiliation(s)
- Ping Wu
- Department of Neurology and Institute of Neurology, Fudan University, Shanghai, People's Republic of China ; PET Center, Department of Nuclear Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Hong-Lei Li
- Department of Neurology and Institute of Neurology, Fudan University, Shanghai, People's Republic of China
| | - Zhi-Jun Liu
- Department of Neurology and Institute of Neurology, Fudan University, Shanghai, People's Republic of China
| | - Qing-Qing Tao
- Department of Neurology and Institute of Neurology, Fudan University, Shanghai, People's Republic of China
| | - Miao Xu
- Department of Neurology and Institute of Neurology, Fudan University, Shanghai, People's Republic of China
| | - Qi-Hao Guo
- Department of Neurology and Institute of Neurology, Fudan University, Shanghai, People's Republic of China
| | - Zhen Hong
- Department of Neurology and Institute of Neurology, Fudan University, Shanghai, People's Republic of China
| | - Yi-Min Sun
- Department of Neurology and Institute of Neurology, Fudan University, Shanghai, People's Republic of China
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17
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Li X, Shen N, Zhang S, Liu J, Jiang Q, Liao M, Feng R, Zhang L, Wang G, Ma G, Zhou H, Chen Z, Jiang Y, Zhao B, Li K, Liu G. CD33 rs3865444 Polymorphism Contributes to Alzheimer's Disease Susceptibility in Chinese, European, and North American Populations. Mol Neurobiol 2014; 52:414-21. [PMID: 25186233 DOI: 10.1007/s12035-014-8880-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 08/25/2014] [Indexed: 11/30/2022]
Abstract
The CD33 rs3865444 polymorphism was first identified to be associated with Alzheimer's disease (AD) in European population. However, the following studies reported weak or no significant association in Chinese, Japanese, Korean, American, and Canadian populations. We think that these negative results may have been caused by either relatively small sample sizes compared with those used for the previous GWAS in European ancestry or the genetic heterogeneity of the rs3865444 polymorphism in different populations. Here, we reevaluated this association using the relatively large-scale samples from previous 27 studies (N = 86,759; 31,106 cases and 55,653 controls) by searching the PubMed, AlzGene, and Google Scholar databases. We identified significant heterogeneity and observed no significant association between the rs3865444 polymorphism and AD in pooled populations (P = 0.264, odds ratio (OR) = 0.97, 95% confidence interval (CI) 0.93-1.02). In subgroup analysis, we identified significant heterogeneity only in East Asian population and observed no significant association between the rs3865444 polymorphism and AD. We further identified significant heterogeneity and observed significant association between the rs3865444 polymorphism and AD in Chinese population. We identified no significant heterogeneity and significant association in North American and European populations. Collectively, our analysis shows that the CD33 rs3865444 polymorphism is associated with AD susceptibility in Chinese, European, and North American populations. We believe that our findings will be very useful for future genetic studies on AD.
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Affiliation(s)
- Xingwang Li
- Department of Anesthesiology, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
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18
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Xu W, Tan L, Yu JT. The Role of PICALM in Alzheimer's Disease. Mol Neurobiol 2014; 52:399-413. [PMID: 25186232 DOI: 10.1007/s12035-014-8878-3] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 08/25/2014] [Indexed: 01/18/2023]
Abstract
Alzheimer's disease (AD) is a highly heritable disease (with heritability up to 76%) with a complex genetic profile of susceptibility, among which large genome-wide association studies (GWASs) pointed to the phosphatidylinositol-binding clathrin assembly protein (PICALM) gene as a susceptibility locus for late-onset Alzheimer's disease (LOAD) incidence. Here, we summarize the known functions of PICALM and discuss its genetic polymorphisms and their potential physiological effects associated with LOAD. Compelling data indicated that PICALM affects AD risk primarily by modulating production, transportation, and clearance of β-amyloid (Aβ) peptide, but other Aβ-independent pathways are discussed, including tauopathy, synaptic dysfunction, disorganized lipid metabolism, immune disorder, and disrupted iron homeostasis. Finally, given the potential involvement of PICALM in facilitating AD occurrence in multiple ways, it might be possible that targeting PICALM might provide promising and novel avenues for AD therapy.
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Affiliation(s)
- Wei Xu
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
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Analyzing 54,936 Samples Supports the Association Between CD2AP rs9349407 Polymorphism and Alzheimer's Disease Susceptibility. Mol Neurobiol 2014; 52:1-7. [PMID: 25092125 DOI: 10.1007/s12035-014-8834-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 07/23/2014] [Indexed: 10/24/2022]
Abstract
The CD2-associated protein (CD2AP) rs9349407 polymorphism was first identified to be significantly associated with Alzheimer's disease (AD) in European ancestry by genome-wide association studies (GWAS). However, the following studies reported no association in Chinese, Japanese, African-American, Canadian, and European populations. We think that these negative results may have been caused by either relatively small sample sizes compared with those used for the previous GWAS in European ancestry or the genetic heterogeneity of the rs9349407 polymorphism in different populations. Here, we reevaluated this association using the relatively large-scale samples from 15 previous studies (N = 54,936; 23,777 cases and 31,159 controls) by searching the PubMed, AlzGene, and Google Scholar databases. Using an additive genetic model, we did not identify a significant heterogeneity among the 15 studies. Using meta-analysis, we observed a significant association between the rs9349407 polymorphism and AD with P = 8.78E-07, odds ratio (OR) = 1.08, 95% confidence interval (CI) 1.05-1.12. To our knowledge, this is the first meta-analysis to investigate the association between rs9349407 polymorphism and AD in East Asian, American, Canadian, and European populations. Our analysis further supports previous findings that the CD2AP rs9349407 polymorphism contributes to AD susceptibility. We believe that our findings will be very useful for future genetic studies on AD.
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20
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CLU rs2279590 polymorphism contributes to Alzheimer's disease susceptibility in Caucasian and Asian populations. J Neural Transm (Vienna) 2014; 122:433-9. [PMID: 24947876 DOI: 10.1007/s00702-014-1260-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 06/09/2014] [Indexed: 01/27/2023]
Abstract
It is reported that CLU rs2279590 polymorphism is significantly associated with Alzheimer's disease (AD) in European ancestry. Recent studies investigated rs2279590 polymorphism in Asian population (Chinese, Japanese and Korean). Four studies showed negative association and two studies showed weak association between rs2279590 and AD. We believe that the weak association or no association may be caused by the relatively small sample size in Asian population. Here, we reinvestigated the association in Asian population. Meanwhile, to investigate the genetic heterogeneity of the rs2279590 polymorphism in Asian and Caucasian populations, we searched the PubMed and AlzGene databases and selected 11 independent studies (6 studies in Asian population and 5 studies in Caucasian population) including 20,655 individuals (8,605 cases and 12,050 controls) for meta-analysis. Our results showed significant association between rs2279590 polymorphism and AD in Asian population with P = 2.00E-04 and P = 2.00E-04 using additive and recessive models, respectively. We observed no significant heterogeneity between Asian and Caucasian populations. We believe that our results may be helpful to understand the mechanisms of CLU in AD pathogenesis and will be useful for future genetic studies in AD.
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Shen N, Chen B, Jiang Y, Feng R, Liao M, Zhang L, Li F, Ma G, Chen Z, Zhao B, Li K, Liu G. An Updated Analysis with 85,939 Samples Confirms the Association Between CR1 rs6656401 Polymorphism and Alzheimer's Disease. Mol Neurobiol 2014; 51:1017-23. [PMID: 24878768 DOI: 10.1007/s12035-014-8761-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 05/22/2014] [Indexed: 01/29/2023]
Abstract
The complement receptor 1 (CR1) rs6656401 polymorphism was first identified to be associated with Alzheimer's disease (AD) in European ancestry. However, the following studies reported weak or no significant association in Chinese, Japanese, Korean, African-American, Polish, and Canadian populations. We think that these negative results may have been caused by either relatively small sample sizes compared with those used for the previous genome-wide association studies (GWAS) in European ancestry or the genetic heterogeneity of the rs6656401 polymorphism in different populations. Here, we reevaluated this association using the relatively large-scale samples from previous 24 studies (N = 85,939, 30,100 cases and 55,839 controls) by searching the PubMed, AlzGene, and Google Scholar databases. Using additive model, we did not identify significant heterogeneity among the 24 studies. We observed significant association between the rs6656401 polymorphism and AD in pooled populations (P = 1.82E-26, odds ratio (OR) = 1.18, 95 % confidence interval (CI) 1.15-1.22). In subgroup analysis, we identified significant results in East Asian population with P = 5.00E-04, OR = 1.31, 95 % CI 1.13-1.52. To our knowledge, this is the first meta-analysis to investigate the association between rs6656401 polymorphism and AD in East Asian, African-American, Canadian, and European populations. Our analysis further supports previous findings that the CR1 rs6656401 polymorphism contributes to AD susceptibility. We believe that our findings will be very useful for future genetic studies on AD.
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Affiliation(s)
- Ning Shen
- Department of Physiology, School of Basic Medical Sciences, Heilongjiang University of Chinese Medicine, Harbin, China
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22
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Liu G, Yao L, Liu J, Jiang Y, Ma G, Chen Z, Zhao B, Li K. Cardiovascular disease contributes to Alzheimer's disease: evidence from large-scale genome-wide association studies. Neurobiol Aging 2014; 35:786-92. [PMID: 24231519 DOI: 10.1016/j.neurobiolaging.2013.10.084] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 10/07/2013] [Accepted: 10/16/2013] [Indexed: 01/10/2023]
Abstract
Alzheimer's disease (AD) is the most common and complex neurodegenerative disease in the elderly individuals. Recently, genome-wide association studies (GWAS) have been used to investigate AD pathogenesis. These GWAS have yielded important new insights into the genetic mechanisms of AD. However, these newly identified AD susceptibility loci exert only very small risk effects and cannot fully explain the underlying AD genetic risk. We hypothesize that combining the findings from different AD GWAS may have greater power than genetic analysis alone. To identify new AD risk factors, we integrated findings from 3 previous large-scale AD GWAS (n = 14,138) using a gene-based meta-analysis and subsequently conducted a pathway analysis using the kyoto encyclopedia of genes and genomes and gene ontology databases. Interestingly, we not only confirmed previous findings, but also highlighted, for the first time, the involvement of cardiovascular disease-related pathways in AD. Our results provided the clues as to the link between these diseases using pathway analysis methods. We believe that these findings will be very useful for future genetic studies of AD.
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Affiliation(s)
- Guiyou Liu
- Institute of Neurology, Guangdong Medical College, Zhanjiang, China; Genome Analysis Laboratory, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.
| | - Lifen Yao
- Department of Neurology, The First Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang, China
| | - Jiafeng Liu
- Department of Neurology, The First Hospital of Harbin, Harbin, Heilongjiang, China
| | - Yongshuai Jiang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Guoda Ma
- Institute of Neurology, Guangdong Medical College, Zhanjiang, China
| | - Zugen Chen
- Department of Human Genetics, University of California at Los Angeles, Los Angeles, CA, USA
| | - Bin Zhao
- Key laboratory of aging-related Cardio-cerebral diseases of Guangdong Province, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
| | - Keshen Li
- Institute of Neurology, Guangdong Medical College, Zhanjiang, China; Key laboratory of aging-related Cardio-cerebral diseases of Guangdong Province, Affiliated Hospital of Guangdong Medical College, Zhanjiang, China.
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Analyzing large-scale samples confirms the association between the ABCA7 rs3764650 polymorphism and Alzheimer's disease susceptibility. Mol Neurobiol 2014; 50:757-64. [PMID: 24643655 DOI: 10.1007/s12035-014-8670-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Accepted: 02/28/2014] [Indexed: 10/25/2022]
Abstract
Large-scale genome-wide association studies (GWAS) have revealed that the ABCA7 rs3764650 polymorphism (or its proxies, namely rs115550680, rs3752246, and rs4147929) is associated with Alzheimer's disease (AD) susceptibility in individuals of Caucasian ancestry. The following studies have investigated this finding in Chinese (N = 633 and N = 1,224), Japanese (N = 1,735), Korean (N = 844), African American (N = 5,896), and Canadian (N = 1,104) populations. However, these studies reported a weak or negligible association. We hypothesized that these negative results may have been caused by either relatively small sample sizes compared with those used for the previous GWAS in individuals of Caucasian ancestry or the genetic heterogeneity of the rs3764650 polymorphism (or its proxies) in different populations. Here, we reevaluated the association between rs3764650 and AD using large-scale samples from 18 previous studies (N = 79,381-30,590 cases and 48,791 controls) by searching PubMed, AlzGene, and Google Scholar databases. Using allele, dominant, recessive, and additive models, we did not identify significant heterogeneity among the 18 studies. We observed a significant association between rs3764650 and AD using the allele (P = 1.76E - 26, odds ratio (OR) = 1.21, 95 % confidence interval (CI) 1.17-1.26), dominant (P = 4.00E - 04, OR = 1.17, 95 % CI 1.07-1.28), recessive (P = 3.00E - 03, OR = 1.43, 95 % CI 1.13-1.81), and additive models (P = 3.00E - 03, OR = 1.49, 95 % CI 1.16-1.91). Collectively, our analysis further supports previous findings that the ABCA7 rs3764650 polymorphism is associated with AD susceptibility. We believe that our findings will be very useful for future genetic studies on AD.
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Jiang T, Yu JT, Tan MS, Wang HF, Wang YL, Zhu XC, Zhang W, Tan L. Genetic variation in PICALM and Alzheimer's disease risk in Han Chinese. Neurobiol Aging 2013; 35:934.e1-3. [PMID: 24095218 DOI: 10.1016/j.neurobiolaging.2013.09.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 09/08/2013] [Accepted: 09/10/2013] [Indexed: 11/25/2022]
Abstract
The current study was conducted to investigate the association of phosphatidylinositol-binding clathrin assembly protein gene (PICALM) with late-onset Alzheimer's disease (LOAD) risk in Han Chinese. We first sequenced PICALM for variants in a small sample (n = 100), and the selected variants were then genotyped in a larger cohort (n = 2292). Sequencing analysis identified 16 variants within PICALM including 5 new variants with extreme low frequency in the northern Han Chinese population. However, in the subsequent genotyping, none showed a significant association with LOAD risk after Bonferroni correction. These findings implicate that PICALM might not play a major role in the genetic predisposition to LOAD in Han Chinese.
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Affiliation(s)
- Teng Jiang
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, China
| | - Jin-Tai Yu
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, China; Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, China; Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, China.
| | - Meng-Shan Tan
- Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, China
| | - Hui-Fu Wang
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, China
| | - Ying-Li Wang
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, China
| | - Xi-Chen Zhu
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, China
| | - Wei Zhang
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, China
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, China; Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, China; Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, China.
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