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Immunohistochemical study of a large molecular fragment of thyroglobulin in parafollicular cells

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Summary

Thyroglobulin-like immunoreactivity of the parafollicular cells was studied by an immunoperoxidase bridge technique using antisera against dog thyroglobulin fragments.

  1. 1.

    The dog parafollicular cells were specifically stained by anti-peak I (27S and larger components fraction) antiserum absorbed with peak II (19S fraction). By this method, they were easily distinguishable from the non-reactive follicular cells and colloid droplets. More sensitive staining of the parafollicular cells was possible with anti-peak I (larger components fraction) antiserum. The staining reactions indicated that the antigenic material responsible for immunoreactivity of the parafollicular cells was due to larger molecular components of thyroglobulin corresponding to 32S, 37S or >37S, and was not due to either the 19S thyroglobulin or to the 27S iodoprotein.

  2. 2.

    A conspicuous decrease of the immunoreactive material in the parafollicular cells occurred in the dog after both chronically induced hypercalcemia and antithyroid drug treatment. This coincided with movement of secretory granules containing calcitonin as shown by staining with silver impregnation, HCl-basic dye, and lead-hematoxylin.

  3. 3.

    The antisera against larger molecular components of dog thyroglobulin showed a high degree of cross-reactivity to the parafollicular cells of most of the mammalian species investigated; rats, rabbits, hamsters, mice, cats, lions, goats, cows, and human.

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Authors and Affiliations

  1. Department of Anatomy, Kawasaki Medical School, Kurashiki, Okayama, Japan

    Y. Kameda & A. Ikeda

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  1. Y. Kameda
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  2. A. Ikeda
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This work was supported by a grant from the Ministry of Education of Japan

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Kameda, Y., Ikeda, A. Immunohistochemical study of a large molecular fragment of thyroglobulin in parafollicular cells. Cell Tissue Res. 187, 429–438 (1978). https://doi.org/10.1007/BF00229607

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  • DOI: https://doi.org/10.1007/BF00229607

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