PMID- 14991893 OWN - NLM STAT- MEDLINE DCOM- 20040416 LR - 20141120 IS - 0022-3417 (Print) IS - 0022-3417 (Linking) VI - 202 IP - 3 DP - 2004 Mar TI - Comparative multi-methodological measurement of ERBB2 status in breast cancer. PG - 286-98 AB - The ERBB2 transmembrane tyrosine kinase receptor is both a prognostic marker and a therapeutic target in breast cancer. Accurate determination of ERBB2 status is a prerequisite for the establishment of prognostic significance and for the selection of ERBB2-overexpressing breast tumours for specific treatment. Unfortunately, there is no complete agreement on how this determination should be performed. This study has compared four methods of assessment of ERBB2 status. Two global, extraction-based methods using real-time quantitative PCR on DNA (Q-PCR) or RNA (RQ-PCR) and two non-global, tissue-based methods, ie fluorescence in situ hybridization (FISH) and immunohistochemistry (IHC), were used. The 94 breast cancers tested were enriched in cases scoring 2+ using the IHC scoring system currently in use and for which the actual ERBB2 status remains ill defined. To determine the best parameters and reagents for assessment, two protocols for FISH and five anti-ERBB2 antibodies were used, and both FISH and IHC were carried out on the same tissue microarrays (TMAs). It is shown that the combination of the two tissue-based methods gives the best results. The use of either PCR-based method did not improve the results significantly. A new combined IHC score based on the association of two selected anti-ERBB2 antibodies (HercepTest trade mark and TAB250) and a dual scale for improved assessment of ERBB2 protein expression, particularly in 2+ cases, are proposed. CI - Copyright 2004 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd. FAU - Ginestier, Christophe AU - Ginestier C AD - Departement d'Oncologie Moleculaire, Institut Paoli-Calmettes et U119 Inserm, IFR57, Marseille, France. FAU - Charafe-Jauffret, Emmanuelle AU - Charafe-Jauffret E FAU - Penault-Llorca, Frederique AU - Penault-Llorca F FAU - Geneix, Jeannine AU - Geneix J FAU - Adelaide, Jose AU - Adelaide J FAU - Chaffanet, Max AU - Chaffanet M FAU - Mozziconacci, Marie-Joelle AU - Mozziconacci MJ FAU - Hassoun, Jacques AU - Hassoun J FAU - Viens, Patrice AU - Viens P FAU - Birnbaum, Daniel AU - Birnbaum D FAU - Jacquemier, Jocelyne AU - Jacquemier J LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Pathol JT - The Journal of pathology JID - 0204634 RN - EC 2.7.10.1 (Receptor, ErbB-2) SB - IM MH - Breast Neoplasms/*chemistry MH - Cell Line, Tumor MH - Female MH - Gene Amplification MH - Humans MH - Immunohistochemistry/methods MH - In Situ Hybridization, Fluorescence MH - Predictive Value of Tests MH - Prognosis MH - Receptor, ErbB-2/*analysis MH - Reverse Transcriptase Polymerase Chain Reaction MH - Sensitivity and Specificity EDAT- 2004/03/03 05:00 MHDA- 2004/04/17 05:00 CRDT- 2004/03/03 05:00 PHST- 2004/03/03 05:00 [pubmed] PHST- 2004/04/17 05:00 [medline] PHST- 2004/03/03 05:00 [entrez] AID - 10.1002/path.1523 [doi] PST - ppublish SO - J Pathol. 2004 Mar;202(3):286-98. doi: 10.1002/path.1523.