Studies on the effect of the tissue substance "cornin" on transplantable malignant tumors in mice

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<p>1. In the present experiments, Ehrlich ascites carcinoma (K-tsrain), JTC-11, and C3H mouse mammary tumor (A-strain) were used to study the inhibitory effects of two kinds of comins, crude muscle cornin and crude intestine comin. 2. Daily intraperitoneal administrations of both comins had shown a marked inhibitory effect on the Ehrlich ascites carcinoma. 3. Intestine comin was more effective on the inhibition of the growth of the Ehrlich ascites carcinoma than muscle cornin when administered intraperitoneally. 4. Daily subcutaneous adminstrations of muscle comin had no effect, but doses of 10 mg/mouse/day or 20 mg/mouse/day of intestine cornin had a slight or moderate inhibitory effect on the Ehrlich ascites carcinoma. 5. Intestine comin had an inhibitory effect on the growth of JTC-ll cells in vitro, and made the tumor cells to undergo morphological changes during incubation. 6. Daily intraperitoneal administrations of muscle comin had hardly any effect on the C3H mouse mammary tumor, but intestine comin was evidently effective in male. 7. Intraperitoneal administrations of intestine comin proved to be hardly effective on the C3H mouse mammary tumor, but only in the dose of 30 mg/ mouse/day, it had a moderate inhibitory effect in female. 8. Daily subcutaneous administrations of muscle comin had no effect on the C3H mouse mammary tumor, but intestine comin had a slight effect in male. 9. Muscle cornin had a slight or moderate effect on the C3H mouse mammary tumor, but intestine cornin was hardly effective in female when administered subcutaneously. 10. Repeated intraperitoneal administrations in doses of 30 mg/mouse/day of muscle comin produced intoxication in the treated mice. 11. In general, it seems that intestine comin is more effective on the inhibition of tumor growth than muscle comin.</p>

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