APPEARANCE OF ACETYLCHOLINE RECEPTORS IN THE MYOTOME CELLS OF THE EARLY CHICK EMBRYO
スポンサーリンク
概要
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Appearance and distribution of acetylcholine receptor (AChR) in the myotome cells of the chick embryo were investigated by autoradiography using ^3H-a-bungarotoxin (a-BGT). Acetylcholinesterase (AChE) histochemistry was also performed on the same sections. In the 1, 5 day-old embryo (H-H stage 11), the myotome was not formed and the specific labeling of the toxin was not found on any tissue components. In the 2 day-old embryo (stage 13), when the myotome first formed in the dorsomedial angle of the dermatome, some silver grains were demonstrated on the AChE-positive cells constituting the myotome, and thereafter, the grains on the myotome increased in number as well as in density, as development progressed. On the other hand, the specific labeling of the toxin was not observed on the neural tube, sclerotome (mesenchyme), dermatome or spinal nerves. These findings indicate that since the AChE-positive myotome cells are no longer capable of proliferation (26), AChR appears in the myotome cells shortly after their final cell division.
- 日本組織細胞化学会の論文
著者
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Miki Akinori
Department Of Anatomy Kobe University School Of Medicine
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Mizoguti Humio
Department Of Anatomy Division Ii Kobe University School Of Medicine
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