title: Temperature regulates splicing efficiency of the cold-inducible RNA-binding protein gene Cirbp.
abstract: In mammals, body temperature fluctuates diurnally around a mean value of 36°C-37°C. Despite the small differences between minimal and maximal values, body temperature rhythms can drive robust cycles in gene expression in cultured cells and, likely, animals. Here we studied the mechanisms responsible for the temperature-dependent expression of cold-inducible RNA-binding protein (CIRBP). In NIH3T3 fibroblasts exposed to simulated mouse body temperature cycles, Cirbp mRNA oscillates about threefold in abundance, as it does in mouse livers. This daily mRNA accumulation cycle is directly controlled by temperature oscillations and does not depend on the cells' circadian clocks. Here we show that the temperature-dependent accumulation of Cirbp mRNA is controlled primarily by the regulation of splicing efficiency, defined as the fraction of Cirbp pre-mRNA processed into mature mRNA. As revealed by genome-wide "approach to steady-state" kinetics, this post-transcriptional mechanism is widespread in the temperature-dependent control of gene expression.
authors.affiliation: Department of Molecular Biology, University of Geneva, CH-1211 Geneva 4, Switzerland;
authors.forename: Ivana
authors.initials: I
authors.lastname: Gotic
authors.affiliation: The Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Swiss Institute of Bioinformatics, CH-1015 Lausanne, Switzerland.
authors.forename: Saeed
authors.initials: S
authors.lastname: Omidi
authors.affiliation: Department of Molecular Biology, University of Geneva, CH-1211 Geneva 4, Switzerland;
authors.forename: Fabienne
authors.initials: F
authors.lastname: Fleury-Olela
authors.affiliation: The Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Swiss Institute of Bioinformatics, CH-1015 Lausanne, Switzerland.
authors.forename: Nacho
authors.initials: N
authors.lastname: Molina
authors.affiliation: The Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Swiss Institute of Bioinformatics, CH-1015 Lausanne, Switzerland.
authors.forename: Felix
authors.initials: F
authors.lastname: Naef
authors.affiliation: Department of Molecular Biology, University of Geneva, CH-1211 Geneva 4, Switzerland;
authors.forename: Ueli
authors.initials: U
authors.lastname: Schibler
mesh_terms: D000818:Animals; D001831:Body Temperature; D003080:Cold Temperature; D005786:Gene Expression Regulation; D055106:Genome-Wide Association Study; D008099:Liver / Q000378:metabolism; D051379:Mice; D041681:NIH 3T3 Cells; D020033:Protein Isoforms / Q000235:genetics / Q000378:metabolism; D019154:Protein Splicing / Q000502:physiology*; D012322:RNA Precursors / Q000235:genetics / Q000378:metabolism; D012323:RNA Processing, Post-Transcriptional; D020871:RNA Stability / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000378:metabolism*; D013696:Temperature
chemical_list: C106176:Cirbp protein, mouse; D020033:Protein Isoforms; D012322:RNA Precursors; D012333:RNA, Messenger; D016601:RNA-Binding Proteins
keywords: Cirbp; circadian rhythms; splicing efficiency; temperature