Fig. 1
TH regulates early neural crest development. Thraa MO knockdown (decreased TH signaling) inhibited neural crest migration at 24 (B) and 48 hpf (E) vs. control (A, D) in Tg(foxd3::EGFP). Thraa MO knockdown inhibited expression at 24 hpf of crestin in the head (H) and body (K; between somites, arrows) vs. control (G, J). Dio3 MO knockdown (increased TH) in Tg(foxd3::EGFP) embryos inhibited PA (arrowheads) formation at 24 (C vs. A) and 48 hpf (F vs. D). In situ hybridization for crestin demonstrated Dio3 MO knockdown impaired neural crest migration in the head (I) and between somites (L, arrows) at 24 hpf. Asterisk denotes developing eye. Scale bar=50 or 100 µm as indicated.
Reprinted from Developmental Biology, 373(2), Bohnsack, B.L., and Kahana, A., Thyroid hormone and retinoic acid interact to regulate zebrafish craniofacial neural crest development, 300-309, Copyright (2013) with permission from Elsevier. Full text @ Dev. Biol.