Massively parallel sequencing (MPS) offers additional information in cases that lack reference samples for comparison. The HID-Ion AmpliSeq Ancestry Panel is a forensic multiplex platform consisting of 165 autosomal markers designed to provide biogeographic ancestry information. We analyzed seven different population groups from Asia to assess the accuracy and reliability of analysis, using this panel. In this study, we have designated 750 unrelated Asians, from southern China (n = 99), Beijing (n = 100), Japan (n = 101), Korea (n = 100), Vietnam (n = 100), Nepal (n = 100), India (n = 51), and Pakistan (n = 99). The likelihood ratios of 750 Asians were calculated, using the Torrent Server and the HID SNP Genotyper Plugin Version 4.3.2. The results reveal that all Northeast Asians (China, Japan, and Korea), and Vietnamese, were predicted as East Asians with the highest ethnicity likelihood values from reference data. Although the samples from Nepal, India and Pakistan (Southwest Asians), were predominantly predicted as South Asians, there were seven cases of which results revealed as Europeans, with similar likelihood patterns. Population structure analysis indicated that Southwest Asians have a genetic profile that is distinguishable from those of other Asian populations. This panel was validated for potential usefulness in forensic analysis and the findings could be used as a basis for building additional Asian specific reference databases. Nevertheless, additional analyses comprising larger sample sizes will be necessary, especially Southeast Asians, to fully understand the Asian population structure, and to discriminate them with further details.
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http://dx.doi.org/10.1016/j.legalmed.2018.08.007 | DOI Listing |
Alzheimers Dement
December 2024
University of California, Davis, CA, USA
Background: Genome‐wide association studies (GWAS) for established clinical dementia phenotypes is often limited to Caucasians from European ancestry. Although the incidence of dementia is higher in African Americans and Hispanics, the inclusion of these groups in GWAS research is less common. We examine GWAS for clinical dementia phenotypes in an ethoracially diverse cohort of older adults.
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December 2024
Centre for Healthy Brain Ageing (CHeBA), University of New South Wales, UNSW Sydney, NSW, Australia
Background: Most human genetic association studies have been undertaken in populations of European ancestry, despite >75% of the world’s population being of Asian or African ancestry. In addition, many of the non‐white genetic studies have had small sample sizes and lack replication. To date, >80 different genetic variants have been identified for late‐onset Alzheimer’s disease (AD) using populations mainly of European ancestry and from high income countries, despite more than ∼60% of dementia cases living in low and middle‐income countries.
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December 2024
Yale University, New Haven, CT, USA
Background: Alcohol Use Disorder (AUD) affects over 15 million individuals in the United States, contributing to oxidative stress, neuroinflammation, and elevating the risk of neurodegeneration. Despite this, the connection between AUD and aging conditions, particularly Alzheimer’s disease (AD), remains unclear. AD, with a heritability of 60‐80%, is genetically linked, necessitating an exploration of the molecular implications of AUD and genetic susceptibility to AD.
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December 2024
University of California, San Francisco, San Francisco, CA, USA
Background: is highly pleiotropic, with the e4 allele the strongest genetic risk factor for late‐onset Alzheimer’s disease (AD) and associated with other cardiometabolic traits. The *e4 allele demonstrates ancestry‐specific differences in the risk for AD. Here, we investigated whether similar ancestry‐specific effects are observed across other AD endophenotypes and modifiable risk factors for AD.
View Article and Find Full Text PDFInt J Legal Med
January 2025
Bioinformatics and Evolutionary Biology Laboratory, Department of Genetics, Federal University of Pernambuco, Av. Professor Moraes Rego, Recife, PE, 50670-901, Brazil.
Genetic markers of the Y chromosome are powerful tools for investigating paternal ancestry and are widely used in population and forensic genetics. However, in order to obtain statistics with a higher degree of certainty using these markers, it is necessary to obtain haplotypic frequencies from a representative database, as well as knowing the diversity and structure of the population. The aim of this study was to investigate the genetic diversity of a sample of 1114 unrelated men from three states in the Northeast of Brazil: Paraíba, Pernambuco and Ceará, through the analysis of 23 Y-STRs and to contribute to the expansion of the Brazilian database on these markers.
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