PMID- 35047824 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220201 IS - 2632-8674 (Electronic) IS - 2632-8674 (Linking) VI - 4 IP - 1 DP - 2022 Mar TI - High-grade ovarian cancer associated H/ACA snoRNAs promote cancer cell proliferation and survival. PG - zcab050 LID - 10.1093/narcan/zcab050 [doi] LID - zcab050 AB - Small nucleolar RNAs (snoRNAs) are an omnipresent class of non-coding RNAs involved in the modification and processing of ribosomal RNA (rRNA). As snoRNAs are required for ribosome production, the increase of which is a hallmark of cancer development, their expression would be expected to increase in proliferating cancer cells. However, assessing the nature and extent of snoRNAs' contribution to cancer biology has been largely limited by difficulties in detecting highly structured RNA. In this study, we used a dedicated midsize non-coding RNA (mncRNA) sensitive sequencing technique to accurately survey the snoRNA abundance in independently verified high-grade serous ovarian carcinoma (HGSC) and serous borderline tumour (SBT) tissues. The results identified SNORA81, SNORA19 and SNORA56 as an H/ACA snoRNA signature capable of discriminating between independent sets of HGSC, SBT and normal tissues. The expression of the signature SNORA81 correlates with the level of ribosomal RNA (rRNA) modification and its knockdown inhibits 28S rRNA pseudouridylation and accumulation leading to reduced cell proliferation and migration. Together our data indicate that specific subsets of H/ACA snoRNAs may promote tumour aggressiveness by inducing rRNA modification and synthesis. CI - (c) The Author(s) 2022. Published by Oxford University Press on behalf of Nucleic Acids Research. FAU - Faucher-Giguere, Laurence AU - Faucher-Giguere L AUID- ORCID: 0000-0002-5726-6446 FAU - Roy, Audrey AU - Roy A FAU - Deschamps-Francoeur, Gabrielle AU - Deschamps-Francoeur G AUID- ORCID: 0000-0001-7129-960X FAU - Couture, Sonia AU - Couture S FAU - Nottingham, Ryan M AU - Nottingham RM FAU - Lambowitz, Alan M AU - Lambowitz AM FAU - Scott, Michelle S AU - Scott MS AUID- ORCID: 0000-0001-6231-7714 FAU - Abou Elela, Sherif AU - Abou Elela S AUID- ORCID: 0000-0002-0630-3294 LA - eng GR - R35 GM136216/GM/NIGMS NIH HHS/United States PT - Journal Article DEP - 20220114 PL - England TA - NAR Cancer JT - NAR cancer JID - 101769553 PMC - PMC8759569 EDAT- 2022/01/21 06:00 MHDA- 2022/01/21 06:01 PMCR- 2022/01/14 CRDT- 2022/01/20 06:09 PHST- 2021/08/23 00:00 [received] PHST- 2021/12/08 00:00 [revised] PHST- 2021/12/13 00:00 [accepted] PHST- 2022/01/20 06:09 [entrez] PHST- 2022/01/21 06:00 [pubmed] PHST- 2022/01/21 06:01 [medline] PHST- 2022/01/14 00:00 [pmc-release] AID - zcab050 [pii] AID - 10.1093/narcan/zcab050 [doi] PST - epublish SO - NAR Cancer. 2022 Jan 14;4(1):zcab050. doi: 10.1093/narcan/zcab050. eCollection 2022 Mar.