Glucocorticoids and neonatal brain injury: The hedgehog connection

Alberto Gulino, Enrico De Smaele, Elisabetta Ferretti

Research output: Contribution to journalArticle

Abstract

Glucocorticoids (GCs) play a critical role in neural development; however, their prenatal or neonatal therapeutic use can have detrimental effects on the developing brain. In this issue of the JCI, Heine and Rowitch report that the molecular mechanisms underlying these detrimental effects involve the sonic hedgehog (Shh) signaling pathway, a crucial regulator of brain development and neural stem/progenitor cells (see the related study beginning on page 267). They show that GCs suppress Shh-induced proliferation of cerebellar progenitor cells in postnatal mice and that, conversely, Shh signaling is protective against GC-induced neonatal cerebellar injury by inducing the enzyme 11?HSD2, which inactivates the GCs corticosterone and prednisolone, but not dexamethasone. The data provide a rationale for the therapeutic use of 11?HSD2-sensitive GCs, but not dexamethasone, or for the exploitation of the neuroprotective effect of Shh agonists to prevent GCinduced pre- or neonatal brain injury.

Original languageEnglish
Pages (from-to)243-246
Number of pages4
JournalJournal of Clinical Investigation
Volume119
Issue number2
DOIs
Publication statusPublished - Feb 2 2009

ASJC Scopus subject areas

  • Medicine(all)

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