PMID- 92576 OWN - NLM STAT- MEDLINE DCOM- 19800228 LR - 20200724 IS - 0022-538X (Print) IS - 1098-5514 (Electronic) IS - 0022-538X (Linking) VI - 32 IP - 3 DP - 1979 Dec TI - Establishment of a C3Hf mammary tumor cell line expressing endogenous mouse mammary tumor virus: antigenic and genetic relationships of this virus with highly oncogenic mouse mammary tumor viruses. PG - 852-9 AB - A single-cell clone of C3Hf mammary tumor cells (clone 14) was developed into a continuous cell line expressing high levels of endogenous mouse mammary tumor virus (MMTV) with less than 0.1% murine leukemia virus expression. Comparison of the C3Hf MMTV protein profile on sodium dodecyl sulfatepolyacrylamide gel electrophoresis with that of C3H MMTV revealed that the protein content of the two viruses was quite similar. However, oligonucleotide fingerprints obtained of MMTV 70S RNA revealed that approximately 20% of the large oligonucleotides examined were unique to each virus. The oligonucleotide fingerprint indicated that although the viruses were similar, they differed in their genetic content. The differences in the two viruses extended to immunological differences in the major envelope glycoprotein, gp52. C3Hf MMTV competed only partially in a homologous radioimmunoassay for gp52 of C3H MMTV, whereas C3H MMTV gave complete competition, indicating that gp52 of C3H MMTV contained type-specific determinants not present on gp52 of C3Hf MMTV. Comparison of C3Hf MMTV with highly oncogenic C3H, GR, and RIII MMTVs in a homologous C3H MMTV gp52 assay gave two patterns of reactivity: complete competition by GR and C3H MMTV and incomplete competition by C3Hf and RIII MMTV. Absorption of anti-C3H MMTV serum by either C3Hf MMTV or RIII MMTV removed all antibodies against both viruses but not against GR and C3H MMTVs. These results indicate that C3H and GR MMTVs are more closely related to each other than to RIII and C3Hf MMTVs. FAU - Arthur, L O AU - Arthur LO FAU - Lovinger, G G AU - Lovinger GG FAU - Schochetman, G AU - Schochetman G LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (Antigens, Viral) RN - 0 (Epitopes) RN - 0 (RNA, Viral) RN - 0 (Viral Proteins) SB - IM MH - Animals MH - Antigens, Viral/analysis MH - *Cell Line MH - Epitopes MH - Female MH - Mammary Neoplasms, Experimental/*microbiology MH - Mammary Tumor Virus, Mouse/analysis/*growth & development/immunology MH - Mice MH - *Mice, Inbred C3H MH - RNA, Viral/analysis MH - Viral Proteins/analysis MH - *Virus Cultivation PMC - PMC525934 EDAT- 1979/12/01 00:00 MHDA- 1979/12/01 00:01 PMCR- 1979/12/01 CRDT- 1979/12/01 00:00 PHST- 1979/12/01 00:00 [pubmed] PHST- 1979/12/01 00:01 [medline] PHST- 1979/12/01 00:00 [entrez] PHST- 1979/12/01 00:00 [pmc-release] AID - 10.1128/JVI.32.3.852-859.1979 [doi] PST - ppublish SO - J Virol. 1979 Dec;32(3):852-9. doi: 10.1128/JVI.32.3.852-859.1979.