Limited prognostic value of c-erbB-2 compared to uPA and PAI-1 in primary breast carcinoma.
In a retrospective study of 488 women with primary breast cancer, after a median follow-up of 10 years, we sought interactions between disease-free survival (DFS) and overall survival (OS) and tumor antigen levels of two components of the plasminogen system, urokinase-type plasminogen activator (uPA) and its inhibitor PAI-1, and the transmembrane growth factor receptor c-erbB-2. We used ELISAs (American Diagnostica, Greenwich, CT, USA) to quantify uPA and PAI-1 antigen levels in cytosols, and a double monoclonal antibody-based assay (EIA) (Ciba Corning Diagnostics, Alameda, CA, USA) to quantify c-erbB-2 in membrane extracts of the same tissues. Weak positive correlations were found between uPA and c-erbB-2 (r(s) = 0.146; p = 0.001) and between PAI-1 and c-erbB-2 (r(s) = 0.154; p < 0.001). In the overall population, using univariate analyses, c-erbB-2 overexpression and high uPA and PAI-1 antigen levels (> 300 IU/mg, > 1.40 ng/mg and > 5.53 ng/mg, respectively) were significantly associated with shorter DFS (p = 0.003, p < 0.001 and p < 0.001, respectively) and OS (p < 0.001 in all cases). Using multivariate analyses, PAI-1, node status and tumor size were independent predictors of DFS and c-erbB-2 was retained in the model only for OS. In the node-negative subgroup, PAI-1 was the strongest significant survival predictor both for OS (p = 0.003; HR 2.52) and DFS (p < 0.001; HR 2.39). This study shows that in primary breast cancer c-erbB-2 offers no additional prognostic information when uPA and/or PAI-1 are candidates in the multivariate analyses.
Bouchet
C
C
Department of Biology, Centre René Huguenin, St-Cloud, France.
Ferrero-Poüs
M
M
Hacène
K
K
Becette
V
V
Spyratos
F
F
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor; D001943:Breast Neoplasms / Q000378:metabolism*; D003600:Cytosol / Q000378:metabolism; D018572:Disease-Free Survival; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008207:Lymphatic Metastasis; D008875:Middle Aged; D015999:Multivariate Analysis; D017395:Plasminogen Activator Inhibitor 1 / Q000378:metabolism*; D011379:Prognosis; D016016:Proportional Hazards Models; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000096:biosynthesis*; D011960:Receptors, Estrogen / Q000096:biosynthesis; D011980:Receptors, Progesterone / Q000096:biosynthesis; D012189:Retrospective Studies; D013629:Tamoxifen / Q000627:therapeutic use; D013997:Time Factors; D014568:Urokinase-Type Plasminogen Activator / Q000378:metabolism*
D014408:Biomarkers, Tumor; D017395:Plasminogen Activator Inhibitor 1; D018719:Erb-b2 Receptor Tyrosine Kinases; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D013629:Tamoxifen; D014568:Urokinase-Type Plasminogen Activator