Abstract：
:The cytokinetics of an isogeneic, transplantable, lymphoid leukemia, growing as an ascitic tumor in the C57BL/6 mouse, has been investigated during normal growth and during regression induced by weekly injections i.v. of 1.0 mg Bacillus Calmette-Guérin (BCG). Survival was significantly prolonged in the BCG-treated group, and 27% of the mice were apparently cured. The tumor growth curves showed, furthermore, that BCG-rreated mice could be divided into two groups according to whether the ascitic tumor cell number was at control level or below that of the controls. By methods such as stathmokinetics, tritiated thymidine autoradiography, and cytophotometry, it was demonstrated that the proliferative activity was higher in BCG mice with a low tumor mass as compared to controls and BCG mice with a tumor mass similar to that of controls. The cytokinetic characteristics of BCG mice with a low ascitic tumor cell number were especially expressed by high mitotic activity, high initial labeling indices, short potential tumor doubling time, and a low number of G0-G1 cells. Furthermore the ascitic tumor cell loss rate was increased in these mice during the whole experimental period. It was deduced from the various parameters and especially from the cytophotometric and autoradiographic results that BCG induces a preferential kill of tumor cells in G0-G1 and the first part of the S phase. In addition, the cytological aspects of the ascitic tumor were found to be related to the cell kinetic pattern as the amount of small and large tumor cells increased and decreased, respectively, with accumulation of tumor cells in G0-G1.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Olsson L,Mathé Gsubject
Has Abstractpub_date
1977-06-01 00:00:00pages
1743-9issue
6eissn
0008-5472issn
1538-7445journal_volume
37pub_type
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