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  • Title: Infection of feline embryo adherent cells with feline leukemia virus: feline oncornavirus-associated cell membrane antigen expression and morphologic transformation.
    Author: Rice JB, Schaller JP, Lewis MG, Mathes LE, Hoover EA, Olsen RG.
    Journal: J Natl Cancer Inst; 1981 Jan; 66(1):89-96. PubMed ID: 6256575.
    Abstract:
    Feline embryo adherent cells were infected with the Richard or Kawakami-Theilen strains of feline leukemia virus (FeLV) and examined for feline oncornavirus-associated cell membrane antigen (FOCMA), viral group-specific antigen (gsa) production, and in vitro evidence of transformation. As early as 10 days after infection, when more than half of the infected cells were gsa positive, FOCMA was detected on 5-10 percent of the cells. Transitory morphologic alterations (epithelioid appearance and rounding) were first noted in most cultures around 20-30 days post infection. At this time, approximately 50% of the cells in infected cultures expressed FOCMA. Morphologic characteristics of transformed fibroblastic cells (rounded shape, disordered alignment, and low adhesion to substratum), as well as enhanced agglutinability by plant lectins and ability to grow in agar, were demonstrated in one of four FeLV-infected, FOCMA-positive cultures. Findings showed that FOCMA may be expressed in FeLV-infected monolayer cells independent of transformation as assessed by in vitro criteria.
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