Related Experiment Videos
Thyroid growth promoting serum-IgG in endemic goiter
H P Brezinschek1, M Wilders-Truschnig, G Leb
1Department of Internal Medicine, Karl Franzens University, Graz, Austria.
Acta Medica Austriaca
|January 1, 1990
Summary
Thyroid growth promoting immunoglobulins (TGI) were detected in patients with goiters using rat thyroid cells. This finding helps understand the immune system's role in thyroid growth disorders.
Area of Science:
- Endocrinology
- Immunology
- Cell Biology
Background:
- Goiter, characterized by thyroid gland enlargement, can be endemic or sporadic.
- The role of autoantibodies in thyroid growth is not fully understood.
- Thyroid growth promoting immunoglobulins (TGI) are suspected contributors to goiter development.
Purpose of the Study:
- To detect the presence of TGI in patients with endemic and sporadic euthyroid goiters.
- To utilize a validated cell culture assay for TGI detection.
Main Methods:
- A strain of differentiated rat thyroid cells (FRTL5) in continuous culture was employed.
- A mitotic arrest assay was used, co-stimulating cells with IgG and a suboptimal dose of thyroid-stimulating hormone (TSH).
- IgG preparations from patient sera were tested for TGI activity.
Main Results:
- TGI was detected in a significant majority of endemic goiter cases (65/71).
- TGI was also present in a notable proportion of sporadic goiter cases (9/14).
- The FRTL5 cell assay proved effective in identifying TGI.
Conclusions:
- Thyroid growth promoting immunoglobulins (TGI) are present in patients with both endemic and sporadic euthyroid goiters.
- These findings suggest an autoimmune component contributing to thyroid enlargement in these conditions.
- The study validates a cell-based assay for detecting TGI, aiding further research into goiter pathogenesis.