Cell Populations and Known Surface Antigens of Tumors Induced by Abelson Virus in Pristane-Primed BALB/c Mice: An Analysis by Immunoelectron Microscopy 2

Publisher Website
Google Scholar
Abstract
When Abelson murine leukemia virus (MuLV-A) was inoculated into pristane-primed BALB/c mice, either plasmacytomas (PCT), lymphosarcomas, or their mixed form was induced with a shorter latent period than that for PCT induction in mice treated with pristane alone. All 3 neoplasms were designated Abelson's tumors. The morphology of the induced malignant cells and the presence of known surface antigens were analyzed by electron microscopy. The cell surface antigens (CSA) examined were PC1, X.1, Gross (GCSA), and Moloney (MCSA); viral envelope antigens (VEA) were xVEA, x1-VEA, sub-gsVEA, and MVEA. MuLV-A-pristane-induced PCT cells produced markedly fewer intracisternal type-A particles than did mineral oil-induced PCT cells. Most, if not all, mineral oil-induced PCT cells carried PC1 antigen and produced many extracellular type-C viruses carrying xVEA and x1-VEA, whereas Abelson's tumor cells had both a lower incidence and a smaller amount of PC1 and X.1 antigens and xVEA+ virus and lacked x1-VEA+ virus. In addition, most Abelson's tumors and their type-C viruses did not carry MCSA and MVEA or GCSA and sub-gsVEA. All the macrophages in the PC1+ Abelson's tumors and many macrophages in PC1Abelson's tumors contained various amounts of PC1 on their cell surfaces. For these reasons, Abelson's tumors were clearly distinct from pristane- or mineral oil-induced BALB/c PCT and from M-MuLV- or G-MuLV-induced tumors.

This publication has 0 references indexed in Scilit: