Circular non-coding RNA ANRIL modulates ribosomal RNA maturation and atherosclerosis in humans
Lesca M Holdt, Anika Stahringer, Kristina Sass, Garwin Pichler, Nils A Kulak, Wolfgang Wilfert, Alexander Kohlmaier, Andreas Herbst, Bernd H Northoff, Alexandros Nicolaou, Gabor Gäbel, Frank Beutner, Markus Scholz, Joachim Thiery, Kiran Musunuru, Knut Krohn, Matthias Mann, Daniel Teupser, Lesca M Holdt, Anika Stahringer, Kristina Sass, Garwin Pichler, Nils A Kulak, Wolfgang Wilfert, Alexander Kohlmaier, Andreas Herbst, Bernd H Northoff, Alexandros Nicolaou, Gabor Gäbel, Frank Beutner, Markus Scholz, Joachim Thiery, Kiran Musunuru, Knut Krohn, Matthias Mann, Daniel Teupser
Abstract
Circular RNAs (circRNAs) are broadly expressed in eukaryotic cells, but their molecular mechanism in human disease remains obscure. Here we show that circular antisense non-coding RNA in the INK4 locus (circANRIL), which is transcribed at a locus of atherosclerotic cardiovascular disease on chromosome 9p21, confers atheroprotection by controlling ribosomal RNA (rRNA) maturation and modulating pathways of atherogenesis. CircANRIL binds to pescadillo homologue 1 (PES1), an essential 60S-preribosomal assembly factor, thereby impairing exonuclease-mediated pre-rRNA processing and ribosome biogenesis in vascular smooth muscle cells and macrophages. As a consequence, circANRIL induces nucleolar stress and p53 activation, resulting in the induction of apoptosis and inhibition of proliferation, which are key cell functions in atherosclerosis. Collectively, these findings identify circANRIL as a prototype of a circRNA regulating ribosome biogenesis and conferring atheroprotection, thereby showing that circularization of long non-coding RNAs may alter RNA function and protect from human disease.
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References
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