The SNORD115 (H/MBII-52) and SNORD116 (H/MBII-85) gene clusters at the imprinted Prader-Willi locus generate canonical box C/D snoRNAs
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The imprinted Snurf-Snrpn chromosomal domain contains two large arrays of tandemly repeated, paternally expressed box C/D small-nucleolar RNA (snoRNA) genes: the SNORD115 (H/MBII-52) and SNORD116 (H/MBII-85) gene clusters believed to play key roles in the fine-tuning of serotonin receptor (5-HT2C) pre-mRNA processing and in the etiology of the Prader-Willi Syndrome (PWS), respectively. SNORD115 and SNORD116 were recently proposed to undergo significant conversion into shorter RNA species, the so-called psnoRNAs. Here, we provide evidence that argues against the existence of abundant psnoRNAs in human or mouse brain. Instead, we characterize a previously unsuspected low-abundance, fibrillarin-associated SNORD115-derived smaller RNA species. Based on these findings, we strongly recommend that PWS-encoded SNORD115 and SNORD116 be considered as bona fide box C/D snoRNAs.
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SNORD115 is expressed exclusively in brain and specifically in neurons.
“this cluster of ncRNAs is expressed exclusively in brain and specifically in neurons (Bortolin-Cavaille and Cavaille, 2012; Cavaillé, 2017; Chamberlain, 2013; Chamberlain and Lalande, 2010b; Chung et al., 2020; Keshavarz et al., 2020; Wevrick et al., 1994).”
From Small nucleolar RNAs in plasma extracellular vesicles and their discriminatory power as diagnostic biomarkers of Alzheimer's disease (2021) · cites this paper as Bortolin-Cavaille and Cavaille, 2012
In Results and Discussion (Figure 2; page unavailable), the paper detects SNORD115 in brain RNA and uses liver as a negative control. It does not establish expression exclusively in the brain. The Conclusion only speculates that production of SNORD115 derivatives may be restricted to neuronal tissues; it does not show that SNORD115 itself is expressed specifically in neurons. (LLM, conf=0.83)
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“Second: Does a differential abundance of SNORD115s in AD plasma EV reflect an impaired metabolic or regulatory pathway with a role in AD pathogenesis? In brain, SNORD116 and SNORD115 clusters have been primarily associated with Prader-Willi syndrome (PWS) (Baker et al., 2020; Bortolin-Cavaille and Cavaille, 2012; Cass…”
Influential
- Authors
- Bortolin-Cavaille, M.-L., & Cavaille, J.
- Venue
- Nucleic Acids Research
- Publisher
- Oxford University Press (OUP)
- Published
- 2012-04-11
- Volume
- 40
- Issue
- 14
- Pages
- 6800-6807
- ISSN
- 0305-1048 (ISSN-L)
- 1362-4962
- PMC
- PMC3413130
- OpenAlex
- W1981030624
- Cited by
- 88
- References
- 0
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- FWCI
- 5.20
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Nucleic Acids Research (publishedVersion, cc-by-nc)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- HAL (submittedVersion)
- HighWire Press Open Archive (submittedVersion)
- Funders
- European Commission
- Agence Nationale de la Recherche
- Centre National de la Recherche Scientifique
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Syndromes and Imprinting
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA modifications and cancer
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
- Keywords
- SNORD116, box C/D snoRNA, Prader-Willi syndrome, genomic imprinting, fibrillarin
- MeSH terms
- Animals, Base Sequence, Multigene Family, Humans, Molecular Sequence Data, Prader-Willi Syndrome, Genomic Imprinting, RNA, Small Nucleolar, Mice, Genetic Loci
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