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Sökning: WFRF:(Wilczynski J.)

  • Resultat 1-6 av 6
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2.
  • Librado, P., et al. (författare)
  • The origins and spread of domestic horses from the Western Eurasian steppes
  • 2021
  • Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 598, s. 634-640
  • Tidskriftsartikel (refereegranskat)abstract
    • Analysis of 273 ancient horse genomes reveals that modern domestic horses originated in the Western Eurasian steppes, especially the lower Volga-Don region. Domestication of horses fundamentally transformed long-range mobility and warfare(1). However, modern domesticated breeds do not descend from the earliest domestic horse lineage associated with archaeological evidence of bridling, milking and corralling(2-4) at Botai, Central Asia around 3500 bc(3). Other longstanding candidate regions for horse domestication, such as Iberia(5) and Anatolia(6), have also recently been challenged. Thus, the genetic, geographic and temporal origins of modern domestic horses have remained unknown. Here we pinpoint the Western Eurasian steppes, especially the lower Volga-Don region, as the homeland of modern domestic horses. Furthermore, we map the population changes accompanying domestication from 273 ancient horse genomes. This reveals that modern domestic horses ultimately replaced almost all other local populations as they expanded rapidly across Eurasia from about 2000 bc, synchronously with equestrian material culture, including Sintashta spoke-wheeled chariots. We find that equestrianism involved strong selection for critical locomotor and behavioural adaptations at the GSDMC and ZFPM1 genes. Our results reject the commonly held association(7) between horseback riding and the massive expansion of Yamnaya steppe pastoralists into Europe around 3000 bc(8,9) driving the spread of Indo-European languages(10). This contrasts with the scenario in Asia where Indo-Iranian languages, chariots and horses spread together, following the early second millennium bc Sintashta culture(11,12).
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3.
  • Leung, Y., et al. (författare)
  • Cognition, function, and prevalent dementia in centenarians and near-centenarians: An individual participant data (IPD) meta-analysis of 18 studies
  • 2023
  • Ingår i: Alzheimers & Dementia. - : Wiley. - 1552-5260 .- 1552-5279. ; 19:6, s. 2265-2275
  • Tidskriftsartikel (refereegranskat)abstract
    • IntroductionThere are limited data on prevalence of dementia in centenarians and near-centenarians (C/NC), its determinants, and whether the risk of dementia continues to rise beyond 100. MethodsParticipant-level data were obtained from 18 community-based studies (N = 4427) in 11 countries that included individuals >= 95 years. A harmonization protocol was applied to cognitive and functional impairments, and a meta-analysis was performed. ResultsThe mean age was 98.3 years (SD = 2.67); 79% were women. After adjusting for age, sex, and education, dementia prevalence was 53.2% in women and 45.5% in men, with risk continuing to increase with age. Education (OR 0.95;0.92-0.98) was protective, as was hypertension (odds ratio [OR] 0.51;0.35-0.74) in five studies. Dementia was not associated with diabetes, vision and hearing impairments, smoking, and body mass index (BMI). DiscussionAmong the exceptional old, dementia prevalence remains higher in the older participants. Education was protective against dementia, but other factors for dementia-free survival in C/NC remain to be understood.
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4.
  • Krajcarz, M., et al. (författare)
  • The history of the domestic cat in Central Europe
  • 2022
  • Ingår i: Antiquity. - : Antiquity Publications. - 0003-598X .- 1745-1744. ; 96:390, s. 1628-1633
  • Tidskriftsartikel (refereegranskat)abstract
    • A recent study from Central Europe has changed our perception of the cat's domestication history. The authors discuss how this has led to the development of an interdisciplinary project combining palaeogenetics, zooarchaeologv and radiocarbon dating, with the aim of providing insight into the domestic cat's expansion beyond the Mediterranean.
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5.
  • Stepniak, Karolina, et al. (författare)
  • Mapping chromatin accessibility and active regulatory elements reveals pathological mechanisms in human gliomas
  • 2021
  • Ingår i: Nature Communications. - : Springer Nature. - 2041-1723. ; 12:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Chromatin structure and accessibility, and combinatorial binding of transcription factors to regulatory elements in genomic DNA control transcription. Genetic variations in genes encoding histones, epigenetics-related enzymes or modifiers affect chromatin structure/dynamics and result in alterations in gene expression contributing to cancer development or progression. Gliomas are brain tumors frequently associated with epigenetics-related gene deregulation. We perform whole-genome mapping of chromatin accessibility, histone modifications, DNA methylation patterns and transcriptome analysis simultaneously in multiple tumor samples to unravel epigenetic dysfunctions driving gliomagenesis. Based on the results of the integrative analysis of the acquired profiles, we create an atlas of active enhancers and promoters in benign and malignant gliomas. We explore these elements and intersect with Hi-C data to uncover molecular mechanisms instructing gene expression in gliomas. Gliomas are tumors often associated with epigenetics-related gene deregulation. Here the authors reveal an atlas of active enhancers and promoters in benign and malignant gliomas by performing whole-genome mapping of chromatin accessibility, histone modifications, DNA methylation patterns and transcriptome analysis simultaneously in multiple tumor samples.
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6.
  • Wilczynski, B., Hvidsten, T., Kryshtafovych, A., Stubbs, L., Komorowski, J., Fidelis, K. (författare)
  • A rule-based framework for gene regulation pathways discovery
  • 2003
  • Ingår i: IEEE Computer Society Bioinformatics Conference (CSB2003) Stanford, CA, USA, August 11-14. ; , s. 435-436
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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  • Resultat 1-6 av 6

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