Fig 1

Fig 1 nkx3.1 expression patterns and cell behavior.

All images are captured dorsally and the anterior (A) and posterior (P) axis is marked. (A-C) Expression of nkx3.1 by HCR in situ hybridization. (A) At 16 hpf, nkx3.1 is expressed in the hindbrain and anterior trunk. Arrowheads mark nkx3.1 expression. (B) At 30 hpf, nkx3.1 is expressed in the posterior head and trunk. (C) At 48 hpf, nkx3.1 expression is not detectable. (D-E’) nkx3.1^NTR-mcherry cells (red) are adjacent to endothelium (green; Tg(flk:GFP)) in brain vessels at 4 dpf. Pericytes in midbrain (arrowheads, E, F) and hindbrain (arrowheads, E’, F’) are denoted in dual channel (E, E’) and single-channel pericyte (F, F’) images. (G) Brain pericytes labelled by TgBAC(pdgfrβ:GFP) coexpress nkx3.1^NTR-mcherry 75 hpf. (H) Enlargement of an individual brain pericyte marked by a square in G. (I) Quantification brain pericytes coexpressing nkx3.1 at 75 hpf (N = 3 experiments and 30 embryos). (J-M) Single images from time-lapse of nkx3.1^NTR-mcherry cells in the midbrain. White and yellow arrowheads track individual cells that migrate and divide with time. Scale bar in all images is 50 μm.