Summary
The aim of the present investigation was to study the influence of sex of tumour bearing mice and of ovariectomy on the proliferation kinetics of a solid, transplantable mammary carcinoma (C3H-mouse). According to the growth curves the tumour growth was delayed in spayed female and in male mice compared with normal female animals. This was due to a longer cell cycle time of tumour cells in the former, mainly caused by a prolonged presynthetic gap (TG1). Concerning the growth fraction and the cell loss factor, essential differences could not be detected. Thus, the solid tumour displayed a distinct though partial disengagement of growth from hormonal dependence.
Zusammenfassung
Das Ziel der vorliegenden Untersuchungen war es, den Einfluß des Geschlechts der tumortragenden Mäuse und der Ovariektomie auf das Wachstumsverhalten eines soliden transplantablen Mammacarcinoms der C3H-Maus zu prüfen. Dabei konnte durch Wachstumskurven ermittelt werden, daß das Wachstum des Tumors bei Transplantation auf ovariektomierte und männliche Tiere gegenüber dem bei weiblichen Tieren verzögert war. Autoradiographisch ließ sich hierbei eine längere Generationszeit der Tumorzellen ermitteln, die vor allem durch eine längere präsynthetische Ruhephase (T G1) bedingt war. In bezug auf die Wachstumsfraktion und den Zellverlustfaktor wurden keine wesentlichen Unterschiede gefunden. Insgesamt ließ sich nur eine eingeschränkte hormonelle Beeinflussung des Wachstums der Tumorzellen feststellen, was u.a. mit dem niedrigen Gehalt an Oestrogenreceptoren zusammenhängen könnte.
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Abbreviations
- T Dpot :
-
potential tumour doubling time
- T Dexp :
-
exponential tumour doubling time
- T Deff :
-
effective tumour doubling time
- LI :
-
labeling index
- MI :
-
mitotic index
- T C :
-
cell cycle time
- T S :
-
DNS-synthesis time
- T G1 :
-
presynthetic gap
- T G2 :
-
postsynthetic gap
- GF:
-
growth fraction
- Φ :
-
cell loss factor
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Dedicated Prof. Dr. ing. W.Maurer to his 70th birthday
Supported by Deutsche Forschungsgemeinschaft
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de Lacroix, W., Hensen, F.J., Klein, P.J. et al. Effect of different sex of tumour bearing mice and of ovariectomy on the proliferation kinetics of a solid, transplantable mammary carcinoma (C3H-mouse). Z. Krebsforsch. 87, 181–191 (1976). https://doi.org/10.1007/BF00284375
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DOI: https://doi.org/10.1007/BF00284375