Molecular characteristics and site specific distribution of the pigment of the Silky fowl
Molecular characteristics and site specific distribution of the pigment of the Silky fowl
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DOI：
10.1292/jvms.62.391
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发表时间：
2000-04-01
影响因子：
1.2
通讯作者：
Chikuni, K
中科院分区：
文献类型：
--
作者：
Muroya, S;Tanabe, R;Chikuni, K
乌骨鸡是一种鸡，其各种内部组织色素沉着。从两种乌骨鸡的不同组织中提取乌骨鸡色素，测定其分子结构和内部分布。通过红外光谱分析，乌骨鸡色素有两种光谱类型，一种来自卵巢和精巢，另一种来自骨膜和羽毛。这两个光谱之间的差异可能是由于黑色素的硫含量。特别是羽毛和骨膜的色素光谱具有合成黑色素光谱的共同特征，表明分布在这两种组织中的黑色素细胞在功能上是相同的。根据我们的定量分析，所检查的组织按色素含量的顺序显著分类（p性腺（卵巢或睾丸）=气管大于或等于心脏、肝脏、砂囊、盲肠、肌肉（胸肌和喙上肌）和皮肤。此外，胚胎神经嵴衍生细胞的特定区域，如心脏动脉和头部组织的各个部分，被发现局部色素沉着。这些数据表明，色素沉着过度（纤维黑变病）在乌骨鸡发生在组织和器官特异性的方式，这是密切相关的神经嵴细胞的发展。据推测，鸟类的神经嵴细胞，含有黑素细胞的祖细胞，获得不寻常的能力，过度分化成黑素细胞，并延长其后代的分布沿着神经嵴衍生物的目的地。
Silky fowl, a breed of chicken, is hyperpigmented in its various internal tissues. The pigment was extracted from various tissues of two strains of Silky fowl to determine its molecular structure and internal distribution. Analysis by infrared spectroscopy showed two spectrum patterns of the pigment in Silky fowl; one is from ovary and testis, the other is from periosteum and feather. The difference between the two spectra is possibly due to the sulfur contents of melanin. Especially, the spectra of the pigments from feather and periosteum shared the characteristics of synthesized melanin spectrum in common, which indicates that the melanocytes dispersed in these tissues were functionally the same. According to our quantitative analysis, the tissues examined were classified significantly in the order of the pigment content (p gonads (ovary or testis) = trachea greater than or equal to heart, liver, gizzard, cecum, muscles (Pectoralis and Supracoracoideus) and skin. In addition, the specific regions of embryonic neural crest derived cells, such as cardiac artery and various parts of cephalic tissues, were found to be locally hyperpigmented. These data suggest that hyperpigmentation (fibromelanosis) in Silky fowl chicken occurs in a tissue- and organ-specific manner, which is strongly related to neural crest cell development. It is hypothesized that neural crest cells of the bird, containing melanocyte progenitors, acquire unusual ability to differentiate into melanocytes excessively, and to extend the distribution of their descendant along the destinations of neural crest derivatives.