TY - JOUR
T1 - Core-clock genes Period 1 and 2 regulate visual cascade and cell cycle components during mouse eye development
AU - Bagchi, Udita
AU - Gegnaw, Shumet T.
AU - Milićević, Nemanja
AU - Sandu, Cristina
AU - Brink, Jacoline B. ten
AU - Jongejan, Aldo
AU - Hicks, David
AU - Moerland, Perry D.
AU - Felder-Schmittbuhl, Marie-Paule
AU - Bergen, Arthur A.
PY - 2020
Y1 - 2020
N2 - The retinas from Period 1 (Per1) and Period 2 (Per2) double-mutant mice (Per1−/− Per2Brdm1) display abnormal blue-cone distribution associated with a reduction in cone opsin mRNA and protein levels, up to 1 year of age. To reveal the molecular mechanisms by which Per1 and Per2 control retina development, we analyzed genome-wide gene expression differences between wild-type (WT) and Per1−/− Per2Brdm1 mice across ocular developmental stages (E15, E18 and P3). All clock genes displayed changes in transcript levels along with normal eye development. RNA-Seq data show major gene expression changes between WT and mutant eyes, with the number of differentially expressed genes (DEG) increasing with developmental age. Functional annotation of the genes showed that the most significant changes in expression levels in mutant mice involve molecular pathways relating to circadian rhythm signaling at E15 and E18. At P3, the visual cascade and the cell cycle were respectively higher and lower expressed compared to WT eyes. Overall, our study provides new insights into signaling pathways -phototransduction and cell cycle- controlled by the circadian clock in the eye during development.
AB - The retinas from Period 1 (Per1) and Period 2 (Per2) double-mutant mice (Per1−/− Per2Brdm1) display abnormal blue-cone distribution associated with a reduction in cone opsin mRNA and protein levels, up to 1 year of age. To reveal the molecular mechanisms by which Per1 and Per2 control retina development, we analyzed genome-wide gene expression differences between wild-type (WT) and Per1−/− Per2Brdm1 mice across ocular developmental stages (E15, E18 and P3). All clock genes displayed changes in transcript levels along with normal eye development. RNA-Seq data show major gene expression changes between WT and mutant eyes, with the number of differentially expressed genes (DEG) increasing with developmental age. Functional annotation of the genes showed that the most significant changes in expression levels in mutant mice involve molecular pathways relating to circadian rhythm signaling at E15 and E18. At P3, the visual cascade and the cell cycle were respectively higher and lower expressed compared to WT eyes. Overall, our study provides new insights into signaling pathways -phototransduction and cell cycle- controlled by the circadian clock in the eye during development.
KW - Circadian clock
KW - Eye
KW - Photoreceptor
KW - Differentiation
KW - Transcriptomics
U2 - 10.1016/j.bbagrm.2020.194623
DO - 10.1016/j.bbagrm.2020.194623
M3 - Article
SN - 1874-9399
VL - 1863
JO - Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms
JF - Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms
IS - 10
M1 - 194623
ER -