Cited by 61Pleistocene-Era Hominins and ArchaeologyGenetic Associations and EpidemiologyForensic and Genetic Research

Impact and Evolutionary Determinants of Neanderthal Introgression on Transcriptional and Post-Transcriptional Regulation

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Silvert, Martin, Quintana-Murci, Lluis, Rotival, Maxime·2019·The American Journal of Human Genetics

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Abstract

Archaic admixture is increasingly recognized as an important source of diversity in modern humans, and Neanderthal haplotypes cover 1%-3% of the genome of present-day Eurasians. Recent work has shown that archaic introgression has contributed to human phenotypic diversity, mostly through the regulation of gene expression. Yet the mechanisms through which archaic variants alter gene expression and the forces driving the introgression landscape at regulatory regions remain elusive. Here, we explored the impact of archaic introgression on transcriptional and post-transcriptional regulation. We focused on promoters and enhancers across 127 different tissues as well as on microRNA (miRNA)-mediated regulation. Although miRNAs themselves harbor few archaic variants, we found that some of these variants may have a strong impact on miRNA-mediated gene regulation. Enhancers were by far the regulatory elements most affected by archaic introgression: up to one-third of the tissues we tested presented significant enrichments. Specifically, we found strong enrichments of archaic variants in adipose-related tissues and primary T cells, even after accounting for various genomic and evolutionary confounders such as recombination rate and background selection. Interestingly, we identified signatures of adaptive introgression at enhancers of some key regulators of adipogenesis, raising the interesting hypothesis of a possible adaptation of early Eurasians to colder climates. Collectively, this study sheds new light on the mechanisms through which archaic admixture has impacted gene regulation in Eurasians and, more generally, increases our understanding of the contribution of Neanderthals to the regulation of acquired immunity and adipose homeostasis in modern humans.

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Crossref · 10.1016/j.ajhg.2019.04.016

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  • These findings fully recapitulate previously reported observations in Europeans.

    “Interestingly, these findings fully recapitulate previously reported observations in Europeans [11, 12].”
  • Archaic alleles are thought to drive phenotypic differences by altering gene pre- and post-transcriptional regulatory processes.

    “Here, archaic alleles are thought to drive phenotypic differences by altering gene pre- and post-transcriptional regulatory processes [11].”
  • Enhancers are among the top targeted elements of archaic hominin introgression.

    “Enhancers, in particular, are amongst the top targeted elements of archaic hominin introgression [10, 11].”
  • Studies conducted primarily on Neanderthal introgressed DNA have suggested a non-negligible contribution to gene expression variation in modern humans, with repeated examples of Neanderthal archaic variants falling within regulatory elements or the seed region of mature micro-RNAs predicted to affect transcriptional and post-transcriptional regulatory processes.

    “Indeed, studies conducted primarily on Neanderthal introgressed DNA have suggested a non-negligible contribution to gene expression variation in modern humans [10, 11, 22], with repeated examples of Neanderthal archaic variants falling within regulatory elements or the seed region of mature micro-RNAs predicted to affect transcriptional and post-transcriptional regulatory processes [11, 62].”
  • Admixture with Neanderthals might have similar consequences even across distantly related human populations.

    “In addition, admixture with Neanderthals might have similar consequences even across distantly related human populations, with Neanderthal aSNPs strongly enriched within elements active within blood & immune T cells and mesenchymal cells both in Papuans and Europeans, replicating previously reported observations [11, 12].”

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Authors
Silvert, M., Quintana-Murci, L., & Rotival, M.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Rotival, Maxime
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2019-06
Volume
104
Issue
6
Pages
1241-1250
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2911559590
Cited by
58
References
61
Citations by year
2026: 4 · 2025: 2 · 2024: 11 · 2023: 11 · 2022: 10 · 2021: 9 · 2020: 9 · 2019: 2
FWCI
34.36
Type
journal article
Language
en
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by-nc-sa)
Funders
Agence Nationale pour le Développement de la Recherche en Santé
Topics
  • Social Sciences › Anthropology › Pleistocene-Era Hominins and Archaeology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Forensic and Genetic Research
Keywords
Neanderthal introgression, archaic admixture, enhancers, promoter, microRNA regulation, post-transcriptional regulation, transcriptional regulation, adaptive introgression, adipogenesis, adipose tissue, T cells, adaptive immunity, cold adaptation, Eurasian populations
MeSH terms
Adaptation, Physiological, Adipose Tissue, Animals, Humans, Recombination, Genetic, RNA Processing, Post-Transcriptional, Selection, Genetic, T-Lymphocytes, Transcription, Genetic, Genome, Human, Gene Expression Regulation, Developmental, Evolution, Molecular, Polymorphism, Single Nucleotide, Genomics, MicroRNAs, Adipogenesis, Neanderthals

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