The DNA of 22 fibrosarcomas, newly induced in 0ALWc mice by subcutaneous doses of 3-methylcholanthrene (3-MCA), was tested in NIH 3T3 transformation assay. Activation of K-ras and N-ras was found in 7 and 3 cases respectively. No H-ras activation was detected. Polymerase chain reaction and oligonuc
Generation of crossreacting tumor antigens in ascitic derivatives from murine methylcholanthrene-induced sarcomas
✍ Scribed by Lloyd W. Law
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- French
- Weight
- 569 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0020-7136
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✦ Synopsis
Abstract
Sarcomas induced by the chemical carcinogen 3‐methyl‐cholanthrene (MC) in pedigreed BALB/c strain mice were studied for the existence and characteristics of tumorspecific antigens that induce protective immune defenses in syngeneic mice (TATA). It was found that each of the neoplasms expressed a unique immunogenicity that was stable and heritable over a period of 125 transfers in vivo. Common or crossreacting TATA were not observed. When converted to an ascitic form, two of these sarcomas, CII‐7 and CII‐10, were found to be crossreactive, presumably sharing TATA with each other and with the MC‐induced sarcoma Meth A. Two other neoplasms converted to the ascitic form, however, retained their unique TATA. Although the precise nature of unique and crossreacting TATA is not known, it is hoped that recent investigations in the purification of TATA of chemically induced neoplasms will shed light on the mechanisms responsible for the diversity of tumor‐specific antigens.
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## Abstract Two fibrosarcomas of similar histological type, induced in C3Hf mice by either methylcholanthrene or 3,4‐benz(a)pyrene, were shown to have individually unique tumor‐rejection antigens in classical transplantation‐type experiments. By contrast, sera of autochthonous mice, which resisted
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