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Erschienen in: Anatomical Science International 1/2020

14.06.2019 | Original Article

Immunohistochemical and ultrastructural evaluation of matrix components in mandibular condylar cartilage in comparison with growth plate cartilage in cartilage calcification insufficient rats

verfasst von: Shunichi Shibata, Hitoshi Amano, Motohiko Nagayama, Masato Takahashi, Minoru Watanabe, Masami Tanaka

Erschienen in: Anatomical Science International | Ausgabe 1/2020

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Abstract

Matrix components of growth plate cartilage and mandibular condylar cartilage were immunohistochemically analyzed in cartilage calcification insufficient (CCI) rats, a model for dwarf rats. Reduction in total tibial length, elongation of growth plate, and appearance of noncartilaginous regions in the growth plate were observed in CCI rats. Immunoreactivity for type I collagen and hyaluronic acid (HA) staining were observed in the noncartilaginous region. However, weak immunoreactivity was observed for aggrecan, collagen types II and X, and decorin in this region. Transmission electron microscopy indicated that the noncartilaginous region showed a loose network of thin collagen fibrils, indicating that HA is predominantly involved in capturing space of the noncartilaginous region in the growth plate. Meanwhile, the mandibular condylar cartilage in CCI rats also showed elongation of the cartilaginous region and had a noncartilaginous region, predominantly comprising thick collagen fibrils. The structural difference between the two types of cartilages in CCI rats may be due to the presence of the fibrous cell zone and the fibrocartilaginous nature of the normal condylar cartilage. Additionally, the reduction in mandibular length was relatively less than the reduction in tibial length. The outline of the condylar process showed only slight abnormality. These results suggest that the condylar cartilage compensated its growth by supplying the characteristic noncartilaginous region effectively and may adapt to severe structural changes observed in CCI rats.
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Metadaten
Titel
Immunohistochemical and ultrastructural evaluation of matrix components in mandibular condylar cartilage in comparison with growth plate cartilage in cartilage calcification insufficient rats
verfasst von
Shunichi Shibata
Hitoshi Amano
Motohiko Nagayama
Masato Takahashi
Minoru Watanabe
Masami Tanaka
Publikationsdatum
14.06.2019
Verlag
Springer Singapore
Erschienen in
Anatomical Science International / Ausgabe 1/2020
Print ISSN: 1447-6959
Elektronische ISSN: 1447-073X
DOI
https://doi.org/10.1007/s12565-019-00493-3

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