Misaki Marine Biological Station, Graduate School of Science, The University of Tokyo, Kanagawa, Japan.
Dev Dyn. 2010 Nov;239(11):2947-61. doi: 10.1002/dvdy.22429.
Crinoids have strong regenerative capability and rapidly restore their lost body parts such as arms. We observed the regeneration process of arms of the feather star (stalkless crinoid), Oxycomanthus japonicus, and divided the process into 10 stages. We clarify the position at which the oral and aboral epidermis adhere in wound closure and track the oral-aboral boundary in the regenerate during the entire process of regeneration. We suggest that the concepts of distalization and intercalation, which are proposed to understand animal regeneration integrally, are also applicable to arm regeneration of the feather star. In addition, we clarify that pinnules, appendages extending from the sides of an arm, start to grow in the oral region of the regenerating arm even though a complete pinnule has an oral-aboral axis. The mode of morphogenesis of pinnules in arm regeneration suggests that the oral region functions as the primary patterning tissue for pinnules.
海百合类具有很强的再生能力，可以迅速恢复失去的身体部位，如腕足。我们观察了无柄海百合（羽星）Oxycomanthus japonicus 的腕足再生过程，并将其分为 10 个阶段。我们明确了在愈合过程中口腔和肛口区表皮黏附的位置，并在整个再生过程中追踪再生体中的口腔-肛口区边界。我们认为，用于整体理解动物再生的远端化和嵌合概念也适用于羽星的腕足再生。此外，我们还明确指出，即使完整的羽腕足具有一个口腔-肛口区轴，从腕足侧面延伸出来的附属物羽腕足也开始在再生腕足的口腔区生长。羽腕足再生中羽腕足的形态发生模式表明，口腔区是羽腕足的主要模式组织。
