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Series GSE4201 Query DataSets for GSE4201
Status Public on Feb 17, 2006
Title Zebrafish microRNA miR-430 promotes deadenylation and clearance of maternal mRNAs
Organism Danio rerio
Experiment type Expression profiling by array
Summary MicroRNAs comprise 1-3% of all vertebrate genes, but their in vivo functions and mechanisms of action remain largely unknown. Zebrafish miR-430 is expressed at the onset of zygotic transcription and regulates morphogenesis during early development. Using a microarray approach and in vivo target validation, we find that miR-430 directly regulates several hundred target mRNAs. Targets are highly enriched for maternal mRNAs that accumulate in the absence of miR-430. We also show that miR-430 accelerates the deadenylation of target mRNAs. These results suggest that miR-430 facilitates the deadenylation and clearance of maternal mRNAs during early embryogenesis.
Keywords: Dicer, MZdicer, miR-430, miRNA target, maternal, zygotic
Overall design As a first step towards the identification of miR-430 targets, we compared the rate of mRNA degradation in wild type and maternal-zygotic (MZ) dicer mutant embryos, which are deficient in miRNA processing. We found that the rate of degradation of a target mRNA with partial complementarity to miR-430 is significantly reduced in MZdicer mutants. Providing miR-430 duplexes to MZdicer mutants restores the rate of target decay. These results indicate that miR-430 enhances the decay of target mRNAs.

To identify miR-430 in vivo targets, we compared the mRNA expression profile of embryos that were wild-type, MZdicer, or MZdicer rescued with miR-430 (MZdicer+miR-430). This analysis identified ~600 genes that were upregulated in MZdicer, but not in MZdicer+miR-430.

We have also analyzed the expression profile of the genes in the array at three different time points, one maternal stage(16 cell), and two Zygotic stages 5 hours and 9 hours
Contributor(s) Giraldez AJ, Mishima Y, Rihel J, Grocock RJ, Van Dongen S, Inoue K, Enright AJ, Schier AF
Citation(s) 16484454
Submission date Feb 07, 2006
Last update date Jan 25, 2018
Contact name Antonio J. Giraldez
Phone 203 785 5423
Organization name Yale University
Department Genetics
Lab Giraldez Lab
Street address 333 Cedar Street
City New Haven
State/province CT
ZIP/Postal code 06510
Country USA
Platforms (1)
GPL1319 [Zebrafish] Affymetrix Zebrafish Genome Array
Samples (15)
GSM95611 Zebrafish Embyro_16cell stage_Rep1
GSM95612 Zebrafish Embryo_16 cell stage_Rep2
GSM95613 Zebrafish Embryo_50% epiboly
BioProject PRJNA95055

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Supplementary file Size Download File type/resource
GSE4201_RAW.tar 51.5 Mb (http)(custom) TAR (of CEL, EXP)
Raw data provided as supplementary file

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