Migratory appendicular muscles precursor cells in the common ancestor to all vertebrates
| Autor: | Shigeru Kuratani, Eri Okamoto, Susumu Hyodo, Koh Onimaru, James Sharpe, Mikiko Tanaka, Shigehiro Kuraku, Alexandre Robert-Moreno, Rie Kusakabe |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
education.field_of_study Ecology Population Fish fin Dermomyotome Anatomy Biology biology.organism_classification Trunk Myoblasts 03 medical and health sciences Limb bud 030104 developmental biology Body plan Scyliorhinus Animal Fins Sharks Animals Amniote education Ecology Evolution Behavior and Systematics |
| Zdroj: | Nature Ecology & Evolution. |
| Popis: | In amniote embryos, skeletal muscles in the trunk are derived from epithelial dermomyotomes, the ventral margin of which extends ventrally to form body wall muscles. At limb levels, ventral dermomyotomes also generate limb-muscle precursors, an Lbx1-positive cell population that originates from the dermomyotome and migrates distally into the limb bud. In elasmobranchs, however, muscles in the paired fins were believed to be formed by direct somitic extension, a developmental pattern used by the amniote body wall muscles. Here we re-examined the development of pectoral fin muscles in catsharks, Scyliorhinus, and found that chondrichthyan fin muscles are indeed formed from Lbx-positive muscle precursors. Furthermore, these precursors originate from the ventral edge of the dermomyotome, the rest of which extends towards the ventral midline to form body wall muscles. Therefore, the Lbx1-positive, de-epithelialized appendicular muscle precursors appear to have been established in the body plan before the divergence of Chondrichthyes and Osteichthyes. |
| Databáze: | OpenAIRE |
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