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Concurrent overexpression of p53 and c-erbB-2 correlates with accelerated cycling and concomitant poor prognosis in node-negative breast cancer

Rudolph, Pierre; Alm, Per LU ; Olsson, Håkan LU ; Heidebrecht, Hans-Juergen; Fernö, Mårten LU ; Baldetorp, Bo LU and Parwaresch, Reza (2001) In Human Pathology 32(3). p.311-319
Abstract
Simultaneous overexpression of c-erbB-2 and p53 has been reported to be prognostically unfavorable in breast cancer. Herein, we show that concurrent overexpression of these 2 proteins is associated with a marked reduction in the relative fraction of cells in G(1) phase of the cell cycle, indicating an accelerated cell cycle progression. Using an immunohistochemical approach, we examined 261 cases of node-negative infiltrating ductal carcinomas of the breast with respect to c-erbB-2 and p53 expression and to the proliferative activity measured by the Ki-67 index. By means of a novel monoclonal antibody, Ki-S2, which exclusively recognizes proliferating cells in the S, G(2), and M phases of the reproductive cycle, we were further able to... (More)
Simultaneous overexpression of c-erbB-2 and p53 has been reported to be prognostically unfavorable in breast cancer. Herein, we show that concurrent overexpression of these 2 proteins is associated with a marked reduction in the relative fraction of cells in G(1) phase of the cell cycle, indicating an accelerated cell cycle progression. Using an immunohistochemical approach, we examined 261 cases of node-negative infiltrating ductal carcinomas of the breast with respect to c-erbB-2 and p53 expression and to the proliferative activity measured by the Ki-67 index. By means of a novel monoclonal antibody, Ki-S2, which exclusively recognizes proliferating cells in the S, G(2), and M phases of the reproductive cycle, we were further able to calculate the relative fraction of the cells having passed the restriction point at the G(1)/S boundary, thus defining a cycling ratio (CR). The results were correlated with clinical outcome; median follow-up time was 96 months. Tumors that simultaneously overexpressed c-erbB-2 and p53 had a high median CR and followed an unfavorable course. However, increased CRs were also observed independently of c-erbB-2 and p53 overexpression, suggesting that other molecular mechanisms may contribute to acceleration of cell cycle progression. In a multivariate analysis that included patient age, tumor size, hormone receptor status, c-erbB-2 and p53 expression, and the Ki-67 index, CR emerged as the most significant independent predictor of overall and disease-free survival (P <.0001). It is concluded that the CR is a gauge of cell cycle deregulation and therefore may be a powerful indicator of the biologic behavior of cancers. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
p53, c-erbB-2, cell cycle, Ki-S2, breast cancer, prognosis
in
Human Pathology
volume
32
issue
3
pages
311 - 319
publisher
Elsevier
external identifiers
  • pmid:11274641
  • scopus:0035087639
ISSN
1532-8392
DOI
10.1053/hupa.2001.22748
language
English
LU publication?
yes
id
fdf55edd-723c-448d-8661-0781e8ae5d39 (old id 1120142)
date added to LUP
2008-07-14 08:45:11
date last changed
2018-05-29 11:24:28
@article{fdf55edd-723c-448d-8661-0781e8ae5d39,
  abstract     = {Simultaneous overexpression of c-erbB-2 and p53 has been reported to be prognostically unfavorable in breast cancer. Herein, we show that concurrent overexpression of these 2 proteins is associated with a marked reduction in the relative fraction of cells in G(1) phase of the cell cycle, indicating an accelerated cell cycle progression. Using an immunohistochemical approach, we examined 261 cases of node-negative infiltrating ductal carcinomas of the breast with respect to c-erbB-2 and p53 expression and to the proliferative activity measured by the Ki-67 index. By means of a novel monoclonal antibody, Ki-S2, which exclusively recognizes proliferating cells in the S, G(2), and M phases of the reproductive cycle, we were further able to calculate the relative fraction of the cells having passed the restriction point at the G(1)/S boundary, thus defining a cycling ratio (CR). The results were correlated with clinical outcome; median follow-up time was 96 months. Tumors that simultaneously overexpressed c-erbB-2 and p53 had a high median CR and followed an unfavorable course. However, increased CRs were also observed independently of c-erbB-2 and p53 overexpression, suggesting that other molecular mechanisms may contribute to acceleration of cell cycle progression. In a multivariate analysis that included patient age, tumor size, hormone receptor status, c-erbB-2 and p53 expression, and the Ki-67 index, CR emerged as the most significant independent predictor of overall and disease-free survival (P &lt;.0001). It is concluded that the CR is a gauge of cell cycle deregulation and therefore may be a powerful indicator of the biologic behavior of cancers.},
  author       = {Rudolph, Pierre and Alm, Per and Olsson, Håkan and Heidebrecht, Hans-Juergen and Fernö, Mårten and Baldetorp, Bo and Parwaresch, Reza},
  issn         = {1532-8392},
  keyword      = {p53,c-erbB-2,cell cycle,Ki-S2,breast cancer,prognosis},
  language     = {eng},
  number       = {3},
  pages        = {311--319},
  publisher    = {Elsevier},
  series       = {Human Pathology},
  title        = {Concurrent overexpression of p53 and c-erbB-2 correlates with accelerated cycling and concomitant poor prognosis in node-negative breast cancer},
  url          = {http://dx.doi.org/10.1053/hupa.2001.22748},
  volume       = {32},
  year         = {2001},
}