Abstract
Forty-two meningiomas of different morphological sub-type were examined to determine their pattern of binding to 11 different lectins which characterize cell surface components such as carbohydrate residues. Histiocytic and xanthoma cells within meningiomas could be demonstrated with six different lectins: wheat germ agglutinin (WGA), peanut agglutinin (PNA) Bauhinia purpurea agglutinin (BPA), Helix pomatia agglutinin (HPA), Vicia fava agglutinin (VFA) and Soyabean agglutinin (SBA). Vascular elements including endothelial cells and intimal cells, bound Ulex europaeus agglutinin type 1 (UEA 1), WGA and HPA. The fibrous stroma in fibrous and fibroblastic meningiomas bound PNA, Laburnum alpinum agglutinin (LAA) and SBA. Tumour cells in meningotheliomatous meningiomas and some areas of anaplastic meningiomas bound Concanavalin A, PNA, LAA and VFA whereas tumour cells in fibrous and fibroblastic meningiomas bound BPA, LAA and VFA. Lectin binding has proved to be of value in detecting histiocytic and xanthoma cells together with vascular elements within meningiomas. In addition, the different lectin binding patterns allow different histological sub-types of meningioma to be distinguished although the biological significance of the binding patterns is unclear.
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