Abstract:
:The miR-200 family members have been implicated in stress responses and ovarian tumorigenesis. Here, we find that miR-200c/141 transcription is intimately linked to the transcription of the proximal upstream gene PTPN6 (SHP1) in all physiological conditions tested. PTPN6 and miR-200c/141 are transcriptionally co-regulated by two complementary mechanisms. First, a bypass of the regular PTPN6 polyadenylation signal allows the transcription of the downstream miR-200c/141. Second, the promoters of the PTPN6 and miR-200c/141 transcription units physically interact through a 3-dimensional DNA loop and exhibit similar epigenetic regulation. Our findings highlight that transcription of intergenic miRNAs is a novel outcome of transcriptional read-through and reveal a yet unexplored type of DNA loop associating two closely located promoters. These mechanisms have significant relevance in ovarian cancers and stress response, pathophysiological conditions in which miR-200c/141 exert key functions.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Batista L,Bourachot B,Mateescu B,Reyal F,Mechta-Grigoriou Fdoi
10.1038/ncomms9959subject
Has Abstractpub_date
2016-01-04 00:00:00pages
8959issn
2041-1723pii
ncomms9959journal_volume
7pub_type
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