ArticleBMC genomics2016
Differences in molecular evolutionary rates among microRNAs in the human and chimpanzee genomes.
Article in BMC genomics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 15 citations in OpenAlex.
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- Gene expression networks regulated by human personality.Molecular psychiatry · 2024Review
- Signatures of genetic variation in human microRNAs point to processes of positive selection and population-specific disease risks.Human genetics · 2022Article
- Blood-Based miRNA Biomarkers as Correlates of Brain-Based miRNA Expression.Frontiers in molecular neuroscience · 2022Article
- Human pathways in animal models: possibilities and limitations.Nucleic acids research · 2021Article
- miR-100 inhibits cell proliferation in mantle cell lymphoma by targeting mTOR.Experimental hematology & oncology · 2020Article
- Exploration of exosomal microRNA expression profiles in pigeon 'Milk' during the lactation period.BMC genomics · 2018Article
- Genome-wide microRNA screening in Nile tilapia reveals pervasive isomiRs' transcription, sex-biased arm switching and increasing complexity of expression throughout development.Scientific reports · 2018Article
- MicroRNA-100 suppresses human gastric cancer cell proliferation by targeting CXCR7.Oncology letters · 2018Article
- MiR-451 as a new tumor marker for gastric cancer.Oncotarget · 2017Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe rise of the primate lineage is accompanied by an outstanding emergence of microRNAs, small non-coding RNAs with a prominent role in gene regulation. In spite of their biological importance little is known about the way in which natural selection has influenced microRNAs in the human lineage. To study the recent evolutionary history of human microRNAs and to analyze the signatures of natural selection in genomic regions harbouring microRNAs we have investigated the nucleotide substitution rates of 1,872 human microRNAs in the human and chimpanzee lineages.
resultsWe produced a depurated set of microRNA alignments of human, chimpanzee and orang-utan orthologs combining BLAT and liftOver and selected 1,214 microRNA precursors presenting optimal secondary structures. We classified microRNAs in categories depending on their genomic organization, duplication status and conservation along evolution. We compared substitution rates of the aligned microRNAs between human and chimpanzee using Tajima's Relative Rate Test taking orang-utan as out-group and found several microRNAs with particularly high substitution rates in either the human or chimpanzee branches. We fitted different models of natural selection on these orthologous microRNA alignments and compared them using a likelihood ratio test that uses ancestral repeats and microRNA flanking regions as neutral sequences. We found that although a large fraction of human microRNAs is highly conserved among the three species studied, significant differences in rates of molecular evolution exist among microRNA categories. Particularly, primate-specific microRNAs, which are enriched in isolated and single copy microRNAs, more than doubled substitution rates of those belonging to older, non primate-specific microRNA families.
conclusionsOur results corroborate the remarkable conservation of microRNAs, a proxy of their functional relevance, and indicate that a subset of human microRNAs undergo nucleotide substitutions at higher rates, which may be suggestive of the action of positive selection.
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