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Series GSE240560 Query DataSets for GSE240560
Status Public on Aug 11, 2023
Title A module of microRNAs cooperatively regulating neurogenesis
Organism Drosophila melanogaster
Experiment type Non-coding RNA profiling by high throughput sequencing
Summary MicroRNAs (miRNAs) are essential regulators of all developmental processes, including neurogenesis, when the production of large numbers of neurons from a limited number of neural stem cells depends on the precise control of determination, proliferation and differentiation. However, miRNA regulation of target mRNAs is highly promiscuous, a single miRNA can target many mRNAs and vice versa, raising the question of how specificity is achieved to elicit a precise regulatory response. Here we introduce in vivo AGO-APP, a novel approach to purify Argonaute-bound miRNAs directly from living cells and tissues. Using this technology, we isolate actively inhibiting miRNAs from different neural cell populations in the larval Drosophila central nervous system. We identify a defined group of miRNAs that redundantly target all iconic genes known to control the transition from neuroblasts to neurons. In vivo functional studies demonstrate that knockdown of individual miRNAs among this group does not induce detectable cellular phenotypes. However, simultaneous knockdown of multiple miRNAs leads to precocious stem cell differentiation, demonstrating functional interdependence. Our study shows that miRNAs cooperate within a regulatory module to specify the targeted gene network.
 
Overall design Using the UAS-Gal4 system we generated transgenic flies conditionnally expressing a T6B-YFP fusion protein either in neuroblast (nab driver) or in the entire neuronal lineage (elav driver) or in glial cells (repo driver). After induction at the L3 larvae stage, T6B bound micro-RNAs were pulled down using an anti-GFP antibody and sequenced. Micro-RNA sequencing was performed using the Illumina protocol modified by Kim et al. (2019).
 
Contributor(s) Beclin C, Eichner N, Maurange C, Cremer H, Meister G, Surbhi S, Narbonne K, Erni A
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Submission date Aug 10, 2023
Last update date Aug 11, 2023
Contact name christophe beclin
E-mail(s) christophe.beclin@univ-amu.fr
Phone 00 33 491269341
Organization name CNRS
Department Aix-Marseille université
Lab IBDM
Street address campus de Luminy, case 907
City Marseille
State/province Bouches du Rhone
ZIP/Postal code 13009
Country France
 
Platforms (1)
GPL22106 NextSeq 550 (Drosophila melanogaster)
Samples (9)
GSM7701726 Ago-APP in neuronal cells_1
GSM7701727 Ago-APP in neuronal cells_2
GSM7701728 Ago-APP in neuronal cells_3
Relations
BioProject PRJNA1004235

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Supplementary file Size Download File type/resource
GSE240560_AgoAPP_Seq_cpm.xlsx 33.7 Kb (ftp)(http) XLSX
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Raw data are available in SRA
Processed data are available on Series record

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