| Abstract: | Golden hamsters were submitted to i.p. administration during 4 weeks of 8 anthracyclines, adriamycin (ADM), detorubicin (DTR), daunorubicin (DNR), 4'-epi-adriamycin (eADM), adriamycin hydrochloride (ADMh), rubidazon (RBZ), aclacinomycin (ACM) and AD32, at doses equivalent to 3/4 of those which are optimally oncostatic on murine L1210 leukemia. The comparative study of the mortality, the electron microscopic (EM) alterations of the myocardium, and the light microscopic (EM) alterations of the myocardium, and the light microscopic (LM) lesions of the skin, show that ACM and AD32 are the least toxic drugs. EM detected almost no early lesions of myocardium in ACM treated animals, but, after 4 week's treatment, severe cardiac alterations appeared which, like those after AD32 treatment, are non lethal and reversible. Similarly. LM revealed no histologic changes in the skin following ACM and AD32 administrations, but pathologic alterations, atrophy and alopecia, were observed in animals receiving all other drugs. |
