Detection of the HER-2/neu proto-oncogene protein p185erbB2 by a novel monoclonal antibody (MAB-145ww) in breast cancer membranes from oestrogen and progesterone receptor assays.
Amplification of the proto-oncogene HER-2/neu and/or overexpression of the transmembrane protein p185erbB2 that it encodes occur in approximately 30% of human breast and gynaecological cancers seen clinically and are strongly associated with an unfavourable outcome. We report on the use of a new monoclonal antibody (Mab-145ww) together with immunoblotting for detection of p185erbB2 in membranes that remain after routine processing of breast cancer tissue for steroid receptor assays. Human breast cancer cell lines SKBR3 and MCF-7 were used as high and low controls, respectively, for p185erbB2 expression. Mab-145ww was detected p185erbB2 in more than half of the breast cancer specimens; the expression was intense in SKBR3 cells, but only faint in MCF-7 cells. These results demonstrate that routine processing of cancer tissue for steroid receptor status can include providing a preparation with which to assess p185erbB2 expression and, thus, can provide information potentially useful for the clinical management of individual cancer patients.
Beckmann
M W
MW
Universitätsfrauenklinik Johann Wolfgang Goethe-Universität, Frankfurt am Main.
Toney
L J
LJ
Scharl
A
A
Fuchs-Young
R
R
Greene
G L
GL
Holt
J A
JA
D000911:Antibodies, Monoclonal; D014408:Biomarkers, Tumor / Q000032:analysis*; D015153:Blotting, Western; D001943:Breast Neoplasms / Q000737:chemistry*; D005260:Female; D006801:Humans; D009362:Neoplasm Metastasis; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins / Q000032:analysis*; D011519:Proto-Oncogenes / Q000502:physiology; D018719:Erb-b2 Receptor Tyrosine Kinases; D011960:Receptors, Estrogen / Q000032:analysis; D011980:Receptors, Progesterone / Q000032:analysis
D000911:Antibodies, Monoclonal; D014408:Biomarkers, Tumor; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins; D018719:Erb-b2 Receptor Tyrosine Kinases; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; C000715470:MAS1 protein, human