PMID- 88736 OWN - NLM STAT- MEDLINE DCOM- 19790925 LR - 20190501 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 76 IP - 6 DP - 1979 Jun TI - Virolysis of mouse mammary tumor virus by sera from breast cancer patients. PG - 2984-7 AB - All type C retroviruses are lysed by human serum in apparently antibody-independent, complement-mediated reactions. In contrast, we have now determined that the mouse mammary tumor virus (MMTV), a type B retrovirus, is not disrupted by normal human serum. MMTV was lysed, however, when rabbit antibody to whole MMTV was added to the serum. By taking advantage of this dependence of MMTV lysis on specific antibody, a virolytic assay was developed, based on the measurement of reverse transcriptase released from disrupted virions, to search for evidence of antibodies to MMTV in human sera. Significantly greater virolytic activity was detected in the sera of patients with breast cancer than in sera of patients with benign disease (P less than 0.001) or colorectal cancer (P less than 0.001) or in sera from apparently healthy individuals (P less than 0.002). This assay thus appears to be able to detect a unique attribute, possibly the presence of an antibody crossreacting with MMTV, in serum in patient with breast cancer. FAU - Witkin, S S AU - Witkin SS FAU - Egeli, R A AU - Egeli RA FAU - Sarkar, N H AU - Sarkar NH FAU - Good, R A AU - Good RA FAU - Day, N K AU - Day NK LA - eng PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (Antibodies, Viral) RN - 9007-36-7 (Complement System Proteins) RN - EC 2.7.7.49 (RNA-Directed DNA Polymerase) SB - IM MH - Antibodies, Viral MH - Blood MH - Breast Neoplasms/*microbiology MH - Complement System Proteins MH - Female MH - Humans MH - Lysogeny MH - *Mammary Tumor Virus, Mouse/enzymology MH - RNA-Directed DNA Polymerase/metabolism PMC - PMC383735 EDAT- 1979/06/01 00:00 MHDA- 1979/06/01 00:01 PMCR- 1979/12/01 CRDT- 1979/06/01 00:00 PHST- 1979/06/01 00:00 [pubmed] PHST- 1979/06/01 00:01 [medline] PHST- 1979/06/01 00:00 [entrez] PHST- 1979/12/01 00:00 [pmc-release] AID - 10.1073/pnas.76.6.2984 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 1979 Jun;76(6):2984-7. doi: 10.1073/pnas.76.6.2984.