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Thyroglobulin-reactive T lymphocytes in thyroiditis-prone BB/Wor rats

E M Allen1, J N Thupari

  • 1Medical Service, Baltimore Veterans Administration Medical Center, Maryland, USA.

Journal of Endocrinological Investigation
|January 1, 1995
PubMed
Summary

Thyroglobulin-reactive T lymphocytes were cultured from young rats before developing autoimmune lymphocytic thyroiditis (LT). This confirms a pathogenic role for T cells in spontaneous LT development, independent of thyroglobulin

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IL-10 kinetics in thyroiditis-prone BB/Wor rats.

Autoimmunity·2001

Area of Science:

  • Immunology
  • Endocrinology
  • Autoimmunity

Background:

  • Autoimmune lymphocytic thyroiditis (LT) is a common cause of hypothyroidism.
  • The role of autoreactive T lymphocytes in spontaneous LT is not fully understood.
  • Existing research primarily focuses on experimental autoimmune thyroiditis (EAT) models.

Purpose of the Study:

  • To investigate the pathogenic role of T lymphocytes in spontaneous LT.
  • To culture thyroglobulin-reactive T lymphocytes from LT-prone rats before disease onset.
  • To examine the influence of thyroglobulin's iodine content on T cell response.

Main Methods:

  • Isolation of splenic T lymphocytes from young, unprimed BB/Wor (LT-prone) and Fisher rats.
  • Bulk proliferation assay to test T lymphocyte activation by normal, iodine-poor, and iodine-rich rat thyroglobulin (Tg).

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  • Statistical analysis (Student's t-test, ANOVA) to compare lymphocyte responses.

    • Main Results:

    • BB/Wor rat lymphocytes showed significant activation by all Tg preparations.
    • Fisher rat lymphocytes remained unresponsive to Tg.
    • No significant difference in BB/Wor rat T cell response was observed across different Tg preparations.

    Conclusions:

    • Tg-responsive T lymphocytes can be cultured from young, unprimed LT-prone rats before LT onset.
    • This supports the pathogenic role of antigen-specific T cells in spontaneous autoimmune thyroid disease.
    • Spontaneous LT-associated T cells are not influenced by the iodine content of thyroglobulin, unlike in EAT models.