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In vivo follow-up of the cytotoxic effect of protein A—ricin toxin conjugate, on antibody-coated target cells
Ist Teil von
Immunology letters, 1988-05, Vol.18 (1), p.67-72
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
1988
Link zum Volltext
Quelle
Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)
Beschreibungen/Notizen
Antibodies of the IgG class, specifically interacted with H-2 antigens of murine leukemia EL4 cells, were used to bind the ricin toxin covalently linked to protein A of
Staphylococcus aureus. The toxin thus complexed, introduced in the cytoplasm by endocytosis, was able to kill the leukemic cells inoculated in animals.
The interaction of immunotoxin with the leukemic cells was performed in vitro using one, two or three treatments and the cytotoxic effect on the target cells was followed up in vivo. The time interval between immunotoxin treatments was indicated by the membrane turn-over study of EL4 cells coated with specific antibodies in their monomeric form, complexed by protein A or interacted with protein A—ricin toxin conjugate. A proportion of 99.8% cells killed was obtained after three treatments.