• Microbiology and Biotechnology Letters
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• v.22 no.3
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• pp.322-328
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• 1994

Antitumor and immunoadjuvant activities of Bifidobacterium adolesentis ATCC-15703 were investigated against the ascites and solid forms of tumor induced by Sarcoma 180(S-180) in ICR mice. When 100 $\mu$g of the bacterium was intraperitonealy administered in the mice, the survival rate(T/C %) of the mice was 132% for 50 days after the inoculation of S-180, however the increment of their body weights was suppressed. When the 100 $\mu$g was subcutaneously adminis- tratered at the right grion, the suppresion rate of the tumor growth on the 21st day after inoculation of S-180 were 62.3%. Complete supression of the tumor growth was observed from 2 out of 8 test mice. The bacterium itself appeared to have noncytotoxic substance against the S-180 in vitro. The bacteria] administration markedly enhanced the activity of peritoneal macrophages. The num- ber of peritoneal macrophages at one day after the administration of the 100 $\mu$g increased about 8 times as much as that of the control, and the highest activity of acid phosphatase appeared at 2 days.