Coordination among multiple receptor tyrosine kinase signals controls Drosophila developmental timing and body size

Xueyang Pan, Michael B. O'Connor

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

In holometabolous insects, metamorphic timing and body size are controlled by a neuroendocrine axis composed of the ecdysone-producing prothoracic gland (PG) and its presynaptic neurons (PGNs) producing PTTH. Although PTTH/Torso signaling is considered the primary mediator of metamorphic timing, recent studies indicate that other unidentified PGN-derived factors also affect timing. Here, we demonstrate that the receptor tyrosine kinases anaplastic lymphoma kinase (Alk) and PDGF and VEGF receptor-related (Pvr), function in coordination with PTTH/Torso signaling to regulate pupariation timing and body size. Both Alk and Pvr trigger Ras/Erk signaling in the PG to upregulate expression of ecdysone biosynthetic enzymes, while Alk also suppresses autophagy by activating phosphatidylinositol 3-kinase (PI3K)/Akt. The Alk ligand Jelly belly (Jeb) is produced by the PGNs and serves as a second PGN-derived tropic factor, while Pvr activation mainly relies on autocrine signaling by PG-derived Pvf2 and Pvf3. These findings illustrate that a combination of juxtacrine and autocrine signaling regulates metamorphic timing, the defining event of holometabolous development.

Original languageEnglish (US)
Article number109644
JournalCell reports
Volume36
Issue number9
DOIs
StatePublished - Aug 31 2021

Bibliographical note

Funding Information:
We thank Dr. Ruth Palmer, Dr. Edan Foley, Dr. Norbert Perrimon, and Dr. Ben-Zion Shilo for fly line and reagent sharing. We thank MaryJane Shimell for preforming the in situ jeb and Pvf2/3 hybridization experiments. We also thank the Vienna Drosophila RNAi Center, the Bloomington Drosophila Stock Center, and the National Institute of Genetics in Japan for fly stocks. This work was supported by grant 1R35GM118029 from NIGMS to M.B.O.

Funding Information:
We thank Dr. Ruth Palmer, Dr. Edan Foley, Dr. Norbert Perrimon, and Dr. Ben-Zion Shilo for fly line and reagent sharing. We thank MaryJane Shimell for preforming the in situ jeb and Pvf2/3 hybridization experiments. We also thank the Vienna Drosophila RNAi Center, the Bloomington Drosophila Stock Center, and the National Institute of Genetics in Japan for fly stocks. This work was supported by grant 1R35GM118029 from NIGMS to M.B.O. Conceptualization, M.B.O. and X.P.; methodology, M.B.O. and X.P.; investigation, X.P. and M.B.O.; writing – original draft, X.P.; writing – review & editing, M.B.O. and X.P.; funding acquisition, M.B.O.; supervision, M.B.O. The authors declare no competing interests. While citing references scientifically relevant for this work, we also actively worked to promote gender balance in our reference list.

Publisher Copyright:
© 2021 The Authors

Keywords

  • Drosophila
  • Jak/Stat
  • PDGF and VEGF receptor-related
  • Upd
  • anaplastic lymphoma kinase
  • metamorphosis
  • prothoracic gland
  • prothoracicotropic hormone
  • receptor tyrosine kinase

PubMed: MeSH publication types

  • Journal Article
  • Research Support, N.I.H., Extramural

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