We also did not observe distinct spinal cord populations corresponding to those previously described in the embryonic spinal cord (Hochstim et al., 2008). Those astrocytes were described as dorsoventrally patterned and distinguished by combinatorial expression of Reln and Slit1, but to our knowledge, they have not been more extensively characterized molecularly or at postnatal stages. We did not observe Slit1 expression in astrocytes, while Reln expression correlated with Gfap (not shown).
