Immunolocalization of the components of the plasminogen activating system in breast carcinoma tissue

  • Authors:
    • Y Ito
    • T Kobayashi
    • T Takeda
    • E Wakasugi
    • Y Tamaki
    • Y Nakano
    • N Matsuura
    • M Monden
  • View Affiliations

  • Published online on: November 1, 1996     https://doi.org/10.3892/or.3.6.1021
  • Pages: 1021-1027
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

The plasminogen activating system plays an important role in the progression of carcinomas and the significance of this system in various carcinomas has been thoroughly investigated. To follow up these investigations, we examined the immunolocalization of the components of the plasminogen activating system, namely the urokinase-type plasminogen activator (uPA), its receptor (uPAR), and two inhibitors (PAI-1 and PAI-2), in 72 cases of breast carcinomas. uPA, uPAR and PAI-1 were uniformly expressed in 75.0%, 84.7% and 80.6% of the cases respectively, although their expression was less uniform in T3 or larger carcinomas (p<0.05). Furthermore, the immunoreactivities of these three proteins were often very similar in the lesions. PAI-2 expression was, to the contrary, statistically less extensive (p<0.01)than PAI-1, and only 52.8% of the cases were uniformly positive. The incidence of PAI-2 expression was statistically lower in T3 or larger carcinomas (p<0.01), and in stage III (p<0.01) and grade III carcinomas (p<0.05). Moreover, PAI-1 immunoreactivity was more commonly found in lymph node positive (p<0.05), T3 or larger and stage III carcinomas than PAI-2 immunoreactivity. These findings suggest that uPA, uPAR and PAI-1, whose expression should be regulated by carcinomas once they have grown to a certain degree, work in association with one another, probably promoting carcinoma progression, while PAI-2 might act as the inhibitor in this system. Furthermore, breast carcinomas containing more PAI-I than PAI-2 are more active in respect to both local proliferation and metastasis.

Related Articles

Journal Cover

November 1996
Volume 3 Issue 6

Print ISSN: 1021-335X
Online ISSN:1791-2431

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Ito Y, Kobayashi T, Takeda T, Wakasugi E, Tamaki Y, Nakano Y, Matsuura N and Monden M: Immunolocalization of the components of the plasminogen activating system in breast carcinoma tissue. Oncol Rep 3: 1021-1027, 1996
APA
Ito, Y., Kobayashi, T., Takeda, T., Wakasugi, E., Tamaki, Y., Nakano, Y. ... Monden, M. (1996). Immunolocalization of the components of the plasminogen activating system in breast carcinoma tissue. Oncology Reports, 3, 1021-1027. https://doi.org/10.3892/or.3.6.1021
MLA
Ito, Y., Kobayashi, T., Takeda, T., Wakasugi, E., Tamaki, Y., Nakano, Y., Matsuura, N., Monden, M."Immunolocalization of the components of the plasminogen activating system in breast carcinoma tissue". Oncology Reports 3.6 (1996): 1021-1027.
Chicago
Ito, Y., Kobayashi, T., Takeda, T., Wakasugi, E., Tamaki, Y., Nakano, Y., Matsuura, N., Monden, M."Immunolocalization of the components of the plasminogen activating system in breast carcinoma tissue". Oncology Reports 3, no. 6 (1996): 1021-1027. https://doi.org/10.3892/or.3.6.1021