In vitro and in vivo tumor models for studies of distribution of radiolabelled monoclonal antibodies and fragments.

Détails

ID Serval
serval:BIB_75D6E892B22D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
In vitro and in vivo tumor models for studies of distribution of radiolabelled monoclonal antibodies and fragments.
Périodique
Nuklearmedizin. Nuclear Medicine
Auteur(s)
Buchegger F., Halpern S.E., Sutherland R.M., Schreyer M., Mach J.P.
ISSN
0029-5566 (Print)
ISSN-L
0029-5566
Statut éditorial
Publié
Date de publication
1986
Peer-reviewed
Oui
Volume
25
Numéro
6
Pages
207-209
Langue
anglais
Résumé
Colon carcinoma multicellular spheroids were incubated in vitro with radiolabelled MAbs. The more rapid penetration of fragments as compared to intact MAbs was clearly demonstrated. For the study of antibody localization in tumors in vivo, the model of nude mice with ligated kidneys was used. Although very artificial, this model allowed to demonstrate that, without urinary excretion, Fab fragments accumulated more rapidly into the tumor than intact MAbs and disappeared faster from the blood. This difference was less striking for F(ab')2 fragments. In the liver a decreased accumulation of both types of fragments as compared to intact MAbs was observed. Concerning radioimmunotherapy we think that Fab fragments are not useful because of their too short half-life in the circulation and in tumor and because they will probably be too toxic for the kidneys. Intact MAbs and F(ab')2 fragments have each their advantages. Intact MAbs show highest tumor accumulation in mice without ligated kidney, however, they remain mostly on the periphery of tumor nodules, as shown by autoradiography. F(ab')2 fragments have been found to penetrate deeper into the tumor and to accumulate less in the liver. It might be therefore an advantage to combine intact MAbs with F(ab')2 fragments, so that in the tumor two different regions could be attacked whereas in normal tissues toxicity could be distributed to different organs such as to the liver with intact MAbs and to the kidney with F(ab')2 fragments.
Mots-clé
Animals, Antibodies, Monoclonal/immunology, Carcinoembryonic Antigen/immunology, Colonic Neoplasms/immunology, Humans, Immunoglobulin Fab Fragments/immunology, Indium, Iodine Radioisotopes, Mice, Mice, Nude, Neoplasms, Experimental/immunology, Radioisotopes
Pubmed
Web of science
Création de la notice
25/01/2008 11:27
Dernière modification de la notice
20/08/2019 14:33
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