Kieny M, Mauger A, Chevallier A, Sengel P
Arch Anat Microsc Morphol Exp. 1979;68(4):283-90.
The origin of smooth muscles in the skin of bird embryos has been analyzed in heterospecific quail/chick recombinants. The somitic mesoderm of the wing level of 2-day chick embryos was replaced by homotopic or heterotopic somitic mesoderm from quail embryos. The cellular constitution of tissues was observed in twelve recombinant embryos at 17 or 18 days of incubation. Results show that feather smooth muscles and vascular smooth muscles have the same origin as the cutaneous mesenchyme in which they differentiate. They are of somatopleural origin in the wing integument and of somitic (dermatomal) origin in the dorsal integument. This study further reveals that the muscular and connective tissue wall of blood vessels does not have the same embryonic origin as the endothelium. It is suggested that the latter originates from the primitive aorta.
在异种鹌鹑/鸡重组体中分析了鸟类胚胎皮肤中平滑肌的起源。将2日龄鸡胚胎翼部水平的体节中胚层用来自鹌鹑胚胎的同位或异位体节中胚层替换。在孵化17或18天的12个重组胚胎中观察组织的细胞构成。结果表明，羽毛平滑肌和血管平滑肌与它们所分化的皮肤间充质具有相同的起源。它们在翼部体表为体壁层起源，在背部体表为体节（皮节）起源。这项研究进一步揭示，血管的肌肉和结缔组织壁与内皮没有相同的胚胎起源。提示后者起源于原始主动脉。
