Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of mouse NPAS2 mutant at ZT14

ABSTRACT: Investigation of RNA transcript abundance in aortic tissue of NPAS2 mutant versus wild type mice at ZT14 Experiment Overall Design: One-way ANOVA design with Strain (NPAS mutant/WT) as the independent variable and five replicates in each group

ORGANISM(S): Mus musculus

SUBMITTER: Radu Daniel Rudic

PROVIDER: E-GEOD-3849 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Circadian variation of blood pressure and the vascular response to asynchronous stress.

Curtis Anne M AM Cheng Yan Y Kapoor Shiv S Reilly Dermot D Price Tom S TS Fitzgerald Garret A GA

Proceedings of the National Academy of Sciences of the United States of America 20070220 9

The diurnal variation in the incidence of myocardial infarction and stroke may reflect an influence of the molecular clock and/or the time dependence of exposure to environmental stress. The circadian variation in blood pressure and heart rate is disrupted in mice, Bmal1(-/-), Clock(mut), and Npas2(mut), in which core clock genes are deleted or mutated. Although Bmal1 deletion abolishes the 24-h frequency in cardiovascular rhythms, a shorter ultradian rhythm remains. Sympathoadrenal function is ...[more]

PMID: 17360665

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Project description:Renal excretion of water and major electrolytes exhibits a significant circadian rhythm. This functional periodicity is believed to result, at least in part, from circadian changes in secretion/reabsorption capacities of the distal nephron and collecting ducts. Here, we studied the molecular mechanisms underlying circadian rhythms in the distal nephron segments, i.e. distal convoluted tubule (DCT) and connecting tubule (CNT) and, the cortical collecting duct (CCD). Temporal expression analysis performed on microdissected mouse DCT/CNT or CCD revealed a marked circadian rhythmicity in the expression of a large number of genes crucially involved in various homeostatic functions of the kidney. This analysis also revealed that both DCT/CNT and CCD possess an intrinsic circadian timing system characterized by robust oscillations in the expression of circadian core clock genes (clock, bma11, npas2, per, cry, nr1d1) and clock-controlled Par bZip transcriptional factors dbp, hlf and tef. The clock knockout mice or mice devoid of dbp/hlf/tef (triple knockout) exhibit significant changes in renal expression of several key regulators of water or sodium balance (vasopressin V2 receptor, aquaporin-2, aquaporin-4, M-oM-^AM-!ENaC). Functionally, the loss of clock leads to a complex phenotype characterized by partial diabetes insipidus, dysregulation of sodium excretion rhythms and a significant decrease in blood pressure. Collectively, this study uncovers a major role of molecular clock in renal function. Experiment Overall Design: We examined the temporal profiles of gene expression in mouse distal nephron segments and collecting ducts. The RNA was extracted from microdissected distal convoluted tubules and connecting tubules (DCT/CNT samples) or, cortical collecting ducts (CCD samples). Animals were sacrificed for microdissection every 4 hours, i.e. at ZT0, ZT4, ZT8, ZT12, ZT16 and ZT20 (ZT M-bM-^@M-^S Zeitgeber (circadian) time, indicates time of light-on as ZT0 and time of light-off as ZT12). The microarray hybridization was performed in duplicates on two pools of RNA composed of equivalent amounts of RNA prepared from five animals at each ZT time-point.

Dataset Information

Transcription profiling of mouse NPAS2 mutant at ZT14

Publications

Circadian variation of blood pressure and the vascular response to asynchronous stress.

Similar Datasets

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