Format

Send to

Choose Destination
Biol Open. 2015 May 15;4(7):852-7. doi: 10.1242/bio.012344.

The insulator protein CTCF regulates Drosophila steroidogenesis.

Author information

1
Institute of Molecular Biology of Barcelona, IBMB-CSIC, and Institute for Research in Biomedicine IRB, Barcelona 08028, Spain.
2
Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN 55455, USA.
3
Institute of Molecular Biology of Barcelona, IBMB-CSIC, and Institute for Research in Biomedicine IRB, Barcelona 08028, Spain Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN 55455, USA mlebmc@ibmb.csic.es.

Abstract

The steroid hormone ecdysone is a central regulator of insect development. In this report we show that CTCF expression in the prothoracic gland is required for full transcriptional activation of the Halloween genes spookier, shadow and noppera-bo, which encode ecdysone biosynthetic enzymes, and for proper timing of ecdysone-responsive gene expression. Loss of CTCF results in delayed and less synchronized larval development that can only be rescued by feeding larvae with both, the steroid hormone 20-hydroxyecdysone and cholesterol. Moreover, CTCF-knockdown in prothoracic gland cells leads to increased lipid accumulation. In conclusion, the insulator protein CTCF is required for Halloween gene expression and cholesterol homeostasis in ecdysone-producing cells controlling steroidogenesis.

KEYWORDS:

CTCF; Developmental timing; Ecdysone; Halloween genes

Supplemental Content

Full text links

Icon for HighWire Icon for PubMed Central
Loading ...
Support Center