Induction of IEGs by FL Reelin. Cortical neurons were
treated with FL or CF Reelin for 1 h and mRNA was extracted for
quantitative RT-PCR. A, in 4–5 DIV cultures FL
Reelin induced Arc mRNA expression in a
concentration-dependent manner (10–100 nm), whereas CF
Reelin did not. The immunoblot shown below demonstrates induction of Arc
protein expression after 3 h of stimulation with higher concentrations of
FL, but not CF Reelin. B, FL Reelin induces
Egr family of transcription factors, but not
c-Fos in 4–5 DIV cortical neurons. CF Reelin
has no effect. C, time course of Arc
and Egr1–3 mRNA expression by FL Reelin 50
nm. D, in 10–12 DIV neurons, FL
Reelin induced the expression of all IEGs examined. *,
p < 0.05; **, p
< 0.01. ***, p < 0.001.