Orthopedia expression during Drosophila melanogaster nervous system development and its regulation by microRNA-252.

Autor: Hildebrandt K; Developmental Biology, Saarland University, Building 61, 66421, Homburg, Saar, Germany., Klöppel C; Developmental Biology, Saarland University, Building 61, 66421, Homburg, Saar, Germany., Gogel J; Developmental Biology, Saarland University, Building 61, 66421, Homburg, Saar, Germany., Hartenstein V; Department of Molecular Cell and Developmental Biology, University of California, Los Angeles, CA, 90095, USA., Walldorf U; Developmental Biology, Saarland University, Building 61, 66421, Homburg, Saar, Germany. Electronic address: uwe.walldorf@uks.eu.
Jazyk: angličtina
Zdroj: Developmental biology [Dev Biol] 2022 Dec; Vol. 492, pp. 87-100. Date of Electronic Publication: 2022 Sep 27.
DOI: 10.1016/j.ydbio.2022.09.006
Abstrakt: During brain development of Drosophila melanogaster many transcription factors are involved in regulating neural fate and morphogenesis. In our study we show that the transcription factor Orthopedia (Otp), a member of the 57B homeobox gene cluster, plays an important role in this process. Otp is expressed in a stable pattern in defined lineages from mid-embryonic stages into the adult brain and therefore a very stable marker for these lineages. We determined the abundance of the two different otp transcripts in the brain and hindgut during development using qPCR. CRISPR/Cas9 generated otp mutants of the longer protein form significantly affect the expression of Otp in specific areas. We generated an otp enhancer trap strain by gene targeting and reintegration of Gal4, which mimics the complete expression of otp during development except the embryonic hindgut expression. Since in the embryo, the expression of Otp is posttranscriptionally regulated, we looked for putative miRNAs interacting with the otp 3'UTR, and identified microRNA-252 as a candidate. Further analyses with mutated and deleted forms of the microRNA-252 interacting sequence in the otp 3'UTR demonstrate an in vivo interaction of microRNA-252 with the otp 3'UTR. An effect of this interaction is seen in the adult brain, where Otp expression is partially abolished in a knockout strain of microRNA-252. Our results show that Otp is another important factor for brain development in Drosophila melanogaster.
Competing Interests: Declarations of competing interest None.
(Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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