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Somatic hypermutation in autoimmune thyroid disease

R McIntosh1, P Watson, A Weetman

  • 1Department of Clinical Laboratory Sciences, Queen's Medical Centre, Nottingham, UK.

Immunological Reviews
|May 29, 1998
PubMed
Summary
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Autoimmune thyroid disease involves antibodies targeting thyroglobulin (Tg), thyroid peroxidase (TPO), or TSH receptor (TSHr). Research highlights somatic hypermutation

Area of Science:

  • Immunology
  • Endocrinology
  • Autoimmunity

Background:

  • Autoimmune thyroid disease is a common autoimmune condition.
  • Antibody (Ab) reactivity occurs against thyroglobulin (Tg), thyroid peroxidase (TPO), and TSH receptor (TSHr).

Purpose of the Study:

  • To analyze the role of somatic hypermutation in the development of TSHr antibodies.
  • To characterize the antibody repertoire in thyroid autoimmunity.

Main Methods:

  • Utilizing combinatorial library technology to increase antibody sequence data for Tg and TPO.
  • Analyzing existing antibody sequences to understand mutation patterns and their effects on affinity.

Main Results:

  • A significant increase in antibody sequences against Tg and TPO has been observed.

Related Experiment Videos

  • The antibody repertoire for Tg and TPO is restricted, emphasizing somatic hypermutation's role.
  • High-affinity IgG antibodies against TSHr, characteristic of patient serum, are not yet fully represented in current repertoires.

    • Conclusions:

    • Somatic hypermutation is crucial for high-affinity antibody responses in thyroid autoimmunity.
    • Further isolation of pathologically active TSHr antibodies is needed for comprehensive analysis.
    • Thyroid autoimmunity offers a well-characterized model for studying human autoimmune diseases.