Non-coding RNA: Circular RNAs promote transcription

Exon–intron circular RNAs are a new subclass of non-coding RNAs that interact specifically with the U1 snRNP to promote gene transcription in cis.

[1]  G. Shan,et al.  Exon-intron circular RNAs regulate transcription in the nucleus , 2015, Nature Structural &Molecular Biology.