PMID- 8700555 OWN - NLM STAT- MEDLINE DCOM- 19960904 LR - 20220408 IS - 0950-9232 (Print) IS - 0950-9232 (Linking) VI - 13 IP - 1 DP - 1996 Jul 4 TI - Detection and quantitation of HER-2/neu gene amplification in human breast cancer archival material using fluorescence in situ hybridization. PG - 63-72 AB - Amplification and overexpression of the HER-2/neu gene occurs in 25-30% of human breast cancers. This genetic alteration is associated with a poor clinical prognosis in women with either node negative or node positive breast cancers. The initial studies testing this association were somewhat controversial and this controversy was due in large part to significant heterogeneity in both the methods and/or reagents used in testing archival material for the presence of the alteration. These methods included a number of solid matrix blotting techniques for DNA, RNA and protein as well as immunohistochemistry. Fluorescence in situ hybridization (FISH) represents the newest methodologic approach for testing for this genetic alteration. In this study, FISH is compared to Southern, Northern and Western blot analyses as well as immunohistochemistry in a large cohort of archival human breast cancer specimens. FISH was found to be superior to all other methodologies tested in assessing formalin fixed, paraffin embedded material for HER-2/neu amplification. The results from this study also confirm that overexpression of HER-2/neu rarely occurs in the absence of gene amplification in breast cancer (approximately 3% of cases). This method of analysis is rapid, reproducible and extremely reliable in detecting presence of HER-2/neu gene amplification and should have clinical utility. FAU - Pauletti, G AU - Pauletti G AD - Department of Medicine, University of California, Los Angeles, School of Medicine, Los Angeles, California 90095, USA. FAU - Godolphin, W AU - Godolphin W FAU - Press, M F AU - Press MF FAU - Slamon, D J AU - Slamon DJ LA - eng GR - CA36827/CA/NCI NIH HHS/United States GR - CA48780/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (DNA, Neoplasm) RN - 0 (Fixatives) RN - 0 (Neoplasm Proteins) RN - 1HG84L3525 (Formaldehyde) RN - EC 2.7.10.1 (Receptor, ErbB-2) SB - IM MH - Blotting, Northern MH - Blotting, Southern MH - Blotting, Western MH - Breast Neoplasms/*genetics/pathology MH - DNA, Neoplasm/*genetics MH - Female MH - Fixatives MH - Formaldehyde MH - *Gene Amplification MH - Humans MH - *In Situ Hybridization, Fluorescence MH - Neoplasm Proteins/*genetics MH - Paraffin Embedding MH - Receptor, ErbB-2/*genetics MH - Reproducibility of Results MH - Tissue Fixation EDAT- 1996/07/04 00:00 MHDA- 1996/07/04 00:01 CRDT- 1996/07/04 00:00 PHST- 1996/07/04 00:00 [pubmed] PHST- 1996/07/04 00:01 [medline] PHST- 1996/07/04 00:00 [entrez] PST - ppublish SO - Oncogene. 1996 Jul 4;13(1):63-72.