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Infect Immun. 1974 June; 9(6): 977-984
Copyright © 1974 American Society for Microbiology. All Rights Reserved.

Suppression of Growth of Ehrlich Ascites Tumor Cells in Mice by Trehalose-6, 6' -Dimycolate (Cord Factor) and BCG

Laboratory of Medical Bacteriology, The Hebrew University-Hadassah Medical School, Jerusalem, Israel

ABSTRACT

Growth of Ehrlich ascites tumor cells in mice pretreated with cord factor was compared to growth of the tumor cells after pretreatment with Calmette-Guérin bacilli. Growth of Ehrlich ascites cells was strongly inhibited in the peritoneal cavities of mice pretreated with 80 µg of cord factor. The median survival time of the animals was prolonged (70 versus 17 days), and 40% of the mice survived more than 90 days. Tumor suppression was still detectable 36 days after administration of cord factor. The effect of cord factor was local. Comparable results were obtained with living or killed Calmette-Guérin bacilli. The results are discussed.