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Biomedical subjects

R A Steeves

Publications and source records attributed to R A Steeves.

At least 73 records · Page 4Linked to original sources
PubMed1971

Helper activity of human leukemic tissue extracts for leukemia virus expression in mice.

Extracts of cultured human leukemic tissues increased the spleen focus-forming activity of Friend leukemia virus preparations in BALB/c and other partially resistant mice. Such mice carry the Fv-1(b) gene, which inhibits the expression of helper virus indigenous to the Friend virus complex, and allows co-infecting leukemia viruses of mice, cats, or chickens to substitute for the inhibited helper virus and increase the expression of the spleen focus-forming virus. The helper activity of extracts from human leukemic tissues shared several important properties with that associated with known leukemogenic viruses of animals.

Animals↗
PubMed1968

Mutant Sl alleles of mice affect susceptibility to Friend spleen focus-forming virus.

Mice of genotypes S1/S1(d), S1/+, and S1(d)/+ (but not S1(T)/S1(T) or S1(T)/+) were resistant to spleen focucs-forming virus. The "environment" in which hemopoietic target cells for this virus develop was not conducive for infection or focus formation, or both, but the target cells were not altered directly. The same genes appear to regulate hemopoiesis and leukemogenic transformation.

Alleles↗