TY - JOUR TI - Xnr3 affects brain patterning via cell migration in the neural-epidermal tissue boundary during early Xenopus embryogenesis AU - Morita, Mariko AU - Yamashita, Satoshi AU - Matsukawa, Shinya AU - Haramoto, Yoshikazu AU - Takahashi, Shuji AU - Asashima, Makoto AU - Michiue, Tatsuo T2 - The International Journal of Developmental Biology AB - Neural induction and anteroposterior neural patterning occur simultaneously during Xenopus gastrulation by the inhibition of BMP and Wnt signaling, respectively. However, other processes might be necessary for determining the neural-epidermal boundary. Xenopus nodal-related-3 (Xnr3) is expressed in dorsal blastula and plays a role in neural formation. In this study, we analyzed how Xnr3 affects neural patterning to identify novel mechanisms of neural-epidermal-boundary determination. In situ hybridization revealed that ventro-animal injection with Xnr3 shifted the lateral krox20 expression domain anteriorly and reduced Otx2 expression. The mature region of Xnr3 is necessary for these effects to occur, and the pro-region accelerated them. Phalloidin labeling revealed that cells around the neural-epidermal boundary lost their slender shape following Xnr3 injection. Moreover, we analyzed the cell migration of ectodermal cells and found specific Xnr3-induced effects at the neural-epidermal boundary. These findings together suggested that Xnr3 affects anterior ectoderm migration around the neural-epidermal boundary to induce a specific neural pattern abnormality. Change of the shape of surrounding ectodermal cells and the specific migratory pattern might therefore reflect the novel mechanism of neural-epidermal boundary. PY - 2013 DO - 10.1387/ijdb.130161tm VL - 57 IS - 9-10 SP - 779 EP - 786 J2 - Int. J. Dev. Biol. LA - en SN - 0214-6282 SN - 1696-3547 UR - https://ijdb.ehu.eus/article/130161tm Y2 - 2024/11/05/13:18:26 ER -