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Analysis of lectin binding in benign and malignant thyroid nodules
H Sasano1, M Rojas, S G Silverberg
1Department of Pathology, George Washington University Medical Center, Washington, DC 20037.
Archives of Pathology & Laboratory Medicine
|February 1, 1989
Summary
Thyroid tissue lectin binding was stronger in adenomatoid nodules and neoplastic cells compared to normal tissue. Wheat germ agglutinin and concanavalin A showed the most intense binding in these thyroid conditions.
Area of Science:
- Endocrinology
- Histopathology
- Biochemistry
Background:
- Lectin binding patterns can serve as biomarkers for cellular differentiation and pathology.
- Understanding lectin interactions in thyroid tissues aids in differentiating benign and malignant conditions.
Purpose of the Study:
- To investigate and compare the histochemical lectin binding properties of adenomatoid nodules, follicular adenoma, papillary carcinoma, and microinvasive follicular carcinoma with normal thyroid tissue.
Main Methods:
- Histochemical analysis using eight different lectins (Wheat germ agglutinin, Concanavalin A, Ulex europaeus agglutinin I, Peanut agglutinin, Soybean agglutinin, Dolichos biflorus agglutinin, Ricinus communis agglutinin, Helix pomatia agglutinin).
- Comparison of lectin binding in neoplastic and normal thyroid cells, colloid, and stromal components.
Main Results:
- All lectins, except Ulex europaeus agglutinin I, Peanut agglutinin, and Helix pomatia agglutinin, bound to thyroid cells, colloid, and stroma.
- Helix pomatia agglutinin exclusively bound to stromal cells.
- Ulex europaeus agglutinin I showed weak binding in papillary carcinoma parenchymal cells.
- Lectin binding intensity was generally stronger in adenomatoid and neoplastic thyroid tissues than in normal adjacent tissue.
- Wheat germ agglutinin and Concanavalin A exhibited the most intense binding.
- Papillary carcinoma showed apical cytoplasmic binding, while follicular adenoma, carcinoma, adenomatoid nodules, and normal tissue displayed diffuse surface binding.
Conclusions:
- Lectin binding patterns, particularly with Wheat germ agglutinin and Concanavalin A, are altered in thyroid adenomatoid nodules and neoplasms.
- No definitive lectin binding differences were identified to distinguish between follicular adenoma and carcinoma, or between adenomatoid nodules and follicular neoplasia.
- Further research may refine lectin-based diagnostics for thyroid lesions.