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Evidence from cyclostomes for complex regionalization of the ancestral vertebrate brain.
Sugahara, Fumiaki; Pascual-Anaya, Juan; Oisi, Yasuhiro; Kuraku, Shigehiro; Aota, Shin-ichi; Adachi, Noritaka; Takagi, Wataru; Hirai, Tamami; Murakami, Yasunori; Kuratani, Shigeru[et al.] (Nature Research, 2016)The vertebrate brain is highly complex, but its evolutionary origin remains elusive. Because of the absence of certain developmental domains generally marked by the expression of regulatory genes, the embryonic brain of ... -
Hagfish and lamprey Hox genes reveal conservation of temporal colinearity in vertebrates
Pascual-Anaya, Juan; Sato, Iori; Sugahara, Fumiaki; Higuchi, Shinnosuke; Paps, Jordi; Ren, Yandong; Takagi, Wataru; Ruiz-Villalba, Adrián; Ota, Kinya G.; Wang, Wen; Kuratani, Shigeru[et al.] (Springer Nature, 2018)Hox genes exert fundamental roles for proper regional specification along the main rostro-caudal axis of animal embryos. They are generally expressed in restricted spatial domains according to their position in the cluster ... -
Inner ear development in cyclostomes and evolution of the vertebrate semicircular canals
Higuchi, Shinnosuke; Sugahara, Fumiaki; Pascual-Anaya, Juan; Takagi, Wataru; Oisi, Yasuhiro; Kuratani, Shigeru[et al.] (Springer Nature, 2019)Jawed vertebrates have inner ears with three semicircular canals, the presence of which has been used as a key to understanding evolutionary relationships. Ostracoderms, the jawless stem gnathostomes, had only two canals ... -
Thyroid and endostyle development in cyclostomes provides new insights into the evolutionary history of vertebrates
Takagi, Wataru; Sugahara, Fumiaki; Higuchi, Shinnosuke; Kusakabe, Rie; Pascual-Anaya, Juan; Sato, Iori; Oisi, Yasuhiro; Ogawa, Nobuhiro; Miyanishi, Hiroshi; Adachi, Noritaka; Hyodo, Susumu; Kuratani, Shigeru[et al.] (BMC, 2022)The endostyle is an epithelial exocrine gland found in non‑vertebrate chordates (amphioxi and tunicates) and the larvae of modern lampreys. It is generally considered to be an evolutionary precursor of the thyroid gland ...