Figure 9.

Tanycytes lining the 3V within the hypothalamus exhibit heterogeneous expression of FGFR1 (a-b) and FGFR3 (c-d): At −1.5 mm from bregma, β₂-tanycytes at the base of the 3V strongly express FGFR1 (arrows, a), whereas FGFR3 (C) is expressed much more homogenously in the entire tanycytic layer. In the caudal ARC (−2.1 from bregma), FGFR1 expression is much more uniform (b), whereas FGFR3 at this level is highly expressed in the β_1-α₂ tanycyte transition zone (arrows, d). Scale bar = 250 μm.