ISOLATION AND CHARACTERIZATION OF MISTLETOE EXTRACTS .2. ACTION OF AGGLUTINATING AND CYTOTOXIC FRACTIONS ON MOUSE ASCITES TUMOR-CELLS

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  • 1 January 1977
    • journal article
    • research article
    • Vol. 36  (1) , 119-125
Abstract
Lectin from mistletoe (Viscum album) was studied for its relations with the toxins from V. album, ascites tumor cells of mouse and human immunoglobulins [Ig]. Using affinity chromatography on glutaraldehyde-crosslinked IgG (human) from Viscum crude extract, a fraction was isolated which exhibited full agglutination capacity and high toxicity. The supernatant showed no agglutination capacity but a strong toxic effect on mouse ascites tumor cells. This toxic effect could not be influenced by further additions of insolubilized IgG. Chromatography on DEAE cellulose also gave agglutinating fractions with toxic effects and a non-agglutinating toxic portion. Column chromatography on Sephadex G 75 allowed separation of toxic from agglutinating components. The MW of the toxin remaining after lectin removal was above 10,000. Lectin bound more readily to mouse ascites tumor cells than to erythrocytes.