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Insulin-like growth factor 1 (IGF-1) in multinodular goiters: a possible pathogenetic factor
E Maiorano1, A Ambrosi, R Giorgino
1Institute of Pathological Anatomy, University of Bari School of Medicine, Italy.
Pathology, Research and Practice
|November 1, 1994
Summary
Insulin-like Growth Factor 1 (IGF-1) was found in thyroid cells, supporting its role in thyroid growth regulation. This suggests IGF-1 may be involved in multinodular goiter development.
Area of Science:
- Endocrinology
- Cell Biology
- Pathology
Background:
- In vitro studies suggested Insulin-like Growth Factor 1 (IGF-1) has an autocrine role in thyroid growth.
- The in vivo presence and role of IGF-1 in thyroid regulation require further investigation.
Purpose of the Study:
- To investigate the presence and localization of IGF-1 in normal and multinodular goiter thyroid tissues.
- To determine if thyrocytes produce IGF-1 in vivo and its potential role in multinodular goiter pathogenesis.
Main Methods:
- Radioimmunoassay (RIA) and immunocytochemistry were employed to detect IGF-1.
- Thyrocytes and stromal cells from normal thyroid and multinodular goiter tissues were analyzed.
Main Results:
- IGF-1 was detected in thyroid cells from both normal and multinodular goiter tissues.
- Thyrocytes showed higher IGF-1 accumulation compared to stromal cells.
- Findings suggest thyrocytes are a site of IGF-1 production in vivo.
Conclusions:
- Thyrocytes can accumulate IGF-1 in vivo, supporting an autocrine role in thyroid growth.
- IGF-1 may play a significant role in the pathogenesis of multinodular goiter.