Intrinsic circadian clock of the mammalian retina: importance for retinal processing of visual information.
Circadian clocks are widely distributed in mammalian tissues, but little is known about the physiological functions of clocks outside the suprachiasmatic nucleus of the brain. The retina has an intrinsic circadian clock, but its importance for vision is unknown. Here we show that mice lacking Bmal1, a gene required for clock function, had abnormal retinal transcriptional responses to light and defective inner retinal electrical responses to light, but normal photoreceptor responses to light and retinas that appeared structurally normal by light and electron microscopy. We generated mice with a retina-specific genetic deletion of Bmal1, and they had defects of retinal visual physiology essentially identical to those of mice lacking Bmal1 in all tissues and lacked a circadian rhythm of inner retinal electrical responses to light. Our findings indicate that the intrinsic circadian clock of the retina regulates retinal visual processing in vivo.
Storch
Kai-Florian
KF
Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
Paz
Carlos
C
Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
Signorovitch
James
J
Department of Biostatistics, Harvard School of Public Health, Boston, MA 02115, USA.
Raviola
Elio
E
Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
Pawlyk
Basil
B
Massachusetts Eye & Ear Infirmary, Berman-Gund Laboratory, Department of Ophthalmology, Harvard Medical School, Boston MA 02114, USA.
Li
Tiansen
T
Massachusetts Eye & Ear Infirmary, Berman-Gund Laboratory, Department of Ophthalmology, Harvard Medical School, Boston MA 02114, USA.
Weitz
Charles J
CJ
Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
D056930:ARNTL Transcription Factors; D000818:Animals; D051792:Basic Helix-Loop-Helix Proteins / Q000235:genetics; D001683:Biological Clocks / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D004596:Electroretinography; D017353:Gene Deletion; D017403:In Situ Hybridization; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D020411:Oligonucleotide Array Sequence Analysis; D012160:Retina / Q000166:cytology / Q000502:physiology* / Q000648:ultrastructure
D056930:ARNTL Transcription Factors; D051792:Basic Helix-Loop-Helix Proteins; C538961:Bmal1 protein, mouse
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