Cartilage in the Atlantic hagfish, Myxine glutinosa.
Cartilage in the Atlantic hagfish, Myxine glutinosa.
复制标题
大西洋盲鳗的软骨，Myxine glutinosa。
DOI：
--
复制
发表时间：
1984
影响因子：
--
通讯作者：
Don Babineau
中科院分区：
文献类型：
--
作者：
G. Wright;F. Keeley;J. Youson;Don Babineau
对大西洋盲鳗 Myxine glutinosa 的舌软骨进行光镜和电子显微镜观察以及生化分析，揭示了两种不同类型的软骨，分别称为类型 1 和类型 2。前舌软骨和内侧舌软骨为 1 型，而后舌软骨为 2 型。1 型软骨中的软骨细胞与其他脊椎动物软骨中的软骨细胞相似。高尔基体中存在类似于细胞外基质成分的物质，表明活性软骨细胞参与了基质的合成。 1型软骨的基质包含在区域基质中排列形成同心薄片的原纤维和在区域间基质中不规则排列的分支原纤维。 1 型软骨的生化分析表明，它主要由溴化氰 (CNBr) 不溶性蛋白质组成，其独特的成分被我们称为“粘菌素”。 Myxinin 与 Lamprin 相似，但不相同。 2 型软骨与任何其他已知的脊椎动物软骨没有相似之处。主细胞肥大并以大量细胞质丝为特征。较小巢细胞中细胞器的出现表明巢细胞在某些基质（主要由胶原蛋白组成）的产生中很活跃。还存在微纤维和基底层状材料。 2 型软骨的生化分析表明，CNBr 不溶性物质与粘蛋白不同。对七鳃鳗和盲鳗软骨的比较提示了这样一个概念：这两种无颌动物可能遵循长期独立的进化历史。
Light and electron microscopic observations and biochemical analysis of the lingual cartilages from the Atlantic hagfish, Myxine glutinosa, reveal two different types of cartilage, designated types 1 and 2, respectively. The anterior and medial lingual are type 1, while the posterior lingual cartilage is type 2. Chondrocytes in type 1 cartilage are similar to those found in other vertebrate cartilages. The presence within the Golgi elements of material that resembles a component of the extracellular matrix suggests the involvement of active chondrocytes in the synthesis of the matrix. The matrix of the type 1 cartilage contains fibrils arranged to form concentric lamellae in the territorial matrix and irregularly arranged, branched fibrils in the interterritorial matrix. Biochemical analysis of the type 1 cartilage reveals that it is composed primarily of a cyanogen bromide (CNBr)-insoluble protein of unique composition that we have termed " myxinin ." Myxinin appears to be similar, but not identical, to lamprin . Type 2 cartilage bears no resemblance to any other known vertebrate cartilage. The principal cells are hypertrophied and are characterized by masses of cytoplasmic filaments. The appearance of the organelles in smaller nest cells suggests that nest cells are active in the production of some of the matrix, which consists primarily of collagen. Microfibrils and a basal lamina-like material are also present. Biochemical analysis of the type 2 cartilage reveals that the CNBr-insoluble material is different from myxinin . Comparisons of lamprey and hagfish cartilages prompt the concept that these two agnathans probably followed long-independent evolutionary histories.