A histological study of the collagen in bovine by-products, particularly in digestive organ
1991
Nakamura, F. (Hokkaido Univ., Sapporo (Japan). Faculty of Agriculture) | Kitamura, K. | Okamura, K. | Kondo, K.
The architecture of the collagen fibrillar network and the localization of type I, III and IV collagens in the digestive organs of Holstein steer were studied by the use of the cell-maceration/scanning electron microscope method and the indirect immunofluorescence method. The results are summarized as follows: 1) The SEM views of cross sections of the digestive duct showed the three-dimensional random network of collagen fibrillar bundles extend from the lamina propria to the tunica serosa including the muscularis mucosae, tunica submucosa and the tunica muscularis. 2) In each digestive organ, the loose connective tissue collagen fibrillar bundles were fine but relatively dense. 3) The surface collagen fibrils of the lamina propria of the digestive duct presented a sheet-like structure and the geometrical figures resembled the specific morphologies of each part of the digestive duct cavity. 4) The lamina propria of the digestive duct was intensely immunostained with anti-type III collagen but weakly immunostained with anti-type I collagen. 5) The tunica submucosa and inter-tunica muscular connective tissue of digestiveduct were intensely immunostained with anti-type I collagen. The epithelial-connective tissue junction, muscularis mucosae and the circumferences of blood vessels and smooth muscle cells in tunica muscularis were intensely immunostained with anti-type IV collagen. 6) The collagen in the digestive organs of Holstein steer was quite varied concerning the three-dimensional fibrilogenesis and the localization of its different types
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