Soluble low-molecular-mass tumor-associated proteins promote the suppression of mammary tumors by cyclophosphamide.

Abstract:

:This study examined whether the soluble tumor-associated-antigens (TAA), of 66 kDa and 51 kDa, could promote suppression by anticancer drugs of chemically-induced mammary tumorigenesis. Dimethylbenzanthracene (DMBA, 10 mg/rat, twice) was used to induce mammary tumors. Then, for nine more weeks, the preparation of TAA and cyclophosphamide (CPA), alone or in combination with TAA, were administered in weekly doses. Twenty weeks after DMBA exposure, the mammary tumor yield was 2.4, 2.8 and 2.9 in the experimental groups compared to 3.5 in the controls. Seventy-five percent of the rats in the control group, but only 37% of TAA, 50% of the CPA, and 30% of the CPA and TAA treated animals had malignant tumors. In the experimental groups, 6.5%, 25% and 38%, respectively, of the tumors regressed, compared to 3% in controls. In the groups receiving CPA or TAA, regression was observed in the fifth week of treatment, and in the group receiving combined treatment, already in the first week. The size of the tumors in control rats increased during the last 10 weeks 3.6 times, in the CPA treated rats 1.15 times, but in those receiving CPA plus TAA it decreased by 0.7 times. The results of our experiment demonstrated that TAA have distinct tumor-suppressive properties, and can enhance the anticancer effects of CPA.

journal_name

Int J Oncol

authors

Ben-Hur H,Kossoy G,Zusman I

doi

10.3892/ijo.19.2.407

keywords:

subject

Has Abstract

pub_date

2001-08-01 00:00:00

pages

407-11

issue

2

eissn

1019-6439

issn

1791-2423

journal_volume

19

pub_type

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