The Association of MEG3 lncRNA with Nuclear Speckles in Living Cells.
MEG3
live-cell imaging
lncRNA
nuclear bodies
nuclear speckles
nucleus
splicing
transcription
Journal
Cells
ISSN: 2073-4409
Titre abrégé: Cells
Pays: Switzerland
ID NLM: 101600052
Informations de publication
Date de publication:
16 06 2022
16 06 2022
Historique:
received:
27
03
2022
revised:
12
06
2022
accepted:
13
06
2022
entrez:
24
6
2022
pubmed:
25
6
2022
medline:
28
6
2022
Statut:
epublish
Résumé
Nuclear speckles are nuclear bodies containing RNA-binding proteins as well as RNAs including long non-coding RNAs (lncRNAs). Maternally expressed gene 3 (MEG3) is a nuclear retained lncRNA found to associate with nuclear speckles. To understand the association dynamics of MEG3 lncRNA with nuclear speckles in living cells, we generated a fluorescently tagged MEG3 transcript that could be detected in real time. Under regular conditions, transient association of MEG3 with nuclear speckles was observed, including a nucleoplasmic fraction. Transcription or splicing inactivation conditions, known to affect nuclear speckle structure, showed prominent and increased association of MEG3 lncRNA with the nuclear speckles, specifically forming a ring-like structure around the nuclear speckles. This contrasted with metastasis-associated lung adenocarcinoma (MALAT1) lncRNA that is normally highly associated with nuclear speckles, which was released and dispersed in the nucleoplasm. Under normal conditions, MEG3 dynamically associated with the periphery of the nuclear speckles, but under transcription or splicing inhibition, MEG3 could also enter the center of the nuclear speckle. Altogether, using live-cell imaging approaches, we find that MEG3 lncRNA is a transient resident of nuclear speckles and that its association with this nuclear body is modulated by the levels of transcription and splicing activities in the cell.
Identifiants
pubmed: 35741072
pii: cells11121942
doi: 10.3390/cells11121942
pmc: PMC9221825
pii:
doi:
Substances chimiques
RNA, Long Noncoding
0
RNA-Binding Proteins
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : NIDDK NIH HHS
ID : U01 DK127422
Pays : United States
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