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  • Title: [Presence of antibodies specifically reacting with structural proteins of the mammary cancer virus among antibodies found in circulating immune complexes in patients with breast cancer].
    Author: Litvinov SV, Malivanova TF, Chuev IuV, Kriukova IN.
    Journal: Biull Eksp Biol Med; 1988 Apr; 105(4):475-7. PubMed ID: 2833956.
    Abstract:
    Circulating immune complexes were precipitated from breast cancer patients' sera using 2.5% polyethylene glycol. CIC isolated from 70 ml of sera from 15 patients were dissociated and immunoglobulin-containing fraction was prepared by chromatography on Sephadex G-200 column. The fraction contained IgG specific for MuMTV structural proteins, as revealed by ELISA. CIC preparations from 22 sera of breast cancer patients were digested with pepsin; Fab' fragment preparations were also analysed by ELISA, only one of them was MuMTV-specific. IgG and Fab' fragments isolated from CIC reacted specifically with MuMTV proteins, the reaction was not blocked by virus-free murine milk or other retroviruses (Ra-MuLV and MPMV).
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