Correlation of DNA content, p53, T antigen, and V antigen in simian virus 40‐infected human diploid cells

34Citations
Citations of this article
8Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

Human diploid fibroblasts (HDF) have a finite life span in cell culture which can be extended when transformed with simian virus 40 (SV40). Flow cytometric analysis of SV40‐HDF transformation allowed DNA content changes to be correlated with the appearance, quantity, and distribution of T antigen, p53, and V antigen, three proteins associated with this process. These studies demonstrated a shift in the DNA content to tetraploidy, which was correlated with the age of the SV40‐HDF but not the time of infection. A significant increase of the epitope recognized by Pab122 to host p53 and the epitope PAb101 to SV40 T antigen occurred at the same time the tetraploid population appeared. However, an antigen reactive with SV40 V antibody was present at high levels in most of the population early after infection, but the levels declined with time. The percentage of PAb101‐T antigen‐positive cells increased more rapidly in cells infected at a late passage, and this was concomitant with the shift in DNA content to tetraploid. Analysis of the mean fluorescence of total, gated populations (G1, G2, and >G2) demonstrated that a threshold level of p53 and T antigen was reached in each compartment of the cell cycle. As the transformed phenotype appeared, a population of cells was continually released into the supernatant, and although these cells had a DNA pattern similar to the monolayer cells, the T antigen and p53 levels were 3–5 times higher in the tetraploid G2 cells. These studies correlated the expression of proteins associated with viral transformation in HDF which vary with time and shift in DNA content. Copyright © 1989 Wiley‐Liss, Inc.

Cite

CITATION STYLE

APA

Laffin, J., Fogleman, D., & Lehman, J. M. (1989). Correlation of DNA content, p53, T antigen, and V antigen in simian virus 40‐infected human diploid cells. Cytometry, 10(2), 205–213. https://doi.org/10.1002/cyto.990100212

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free