Areas of asbestoid (amianthoid) fibers in human thyroid cartilage characterized by immunolocalization of collagen types I, II, IX, XI and X

Horst Claassen, Thorsten Kirsch

    Research output: Contribution to journalArticle

    Abstract

    The distribution of type I, II, IX, XI and X collagens in and close to areas of asbestoid (amianthoid) fibers in thyroid cartilages of various ages was investigated in this study. Asbestoid fibers were first detected in thyroid cartilage from a 3-year-old male child. Areas of asbestoid fibers functionally appear to serve as guide rails for vascularization of thyroid cartilage. Alcian blue staining in the presence of 0.3 M MgCl2 revealed a loss of glycosaminoglycans in areas of asbestoid fibers. In addition, the fibers reacted positively with antibodies against collagen types II, IX and XI, but showed no staining with antibodies to collagen types I and X. Territorial matrix of adjacent chondrocytes showed the same staining pattern. In addition to staining for type II, IX and XI collagens, asbestoid fibers showed strong immunostaining for type I collagen after puberty but not for type X collagen. However, groups of chondrocytes within areas of asbestoid fibers reacted strongly with antibodies to type X collagen, suggesting that this collagen plays an important role in matrix of highly differentiated chondrocytes. The finding that these type X collagen-positive chondrocytes also revealed immunostaining for type I collagen confirms previous studies showing that hypertrophic chondrocytes can further differentiate into cells that are characterized by the synthesis of type X and I collagens.

    Original languageEnglish (US)
    Pages (from-to)349-354
    Number of pages6
    JournalCell and Tissue Research
    Volume280
    Issue number2
    DOIs
    StatePublished - May 1995

    Keywords

    • Amianthoid fibers
    • Asbestoid fibers
    • Collagens
    • Human
    • Immunohistochemistry
    • Thyroid cartilage

    ASJC Scopus subject areas

    • Pathology and Forensic Medicine
    • Histology
    • Cell Biology

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