PMID- 23305906 OWN - NLM STAT- MEDLINE DCOM- 20130808 LR - 20141120 IS - 1943-7811 (Electronic) IS - 1525-1578 (Linking) VI - 15 IP - 2 DP - 2013 Mar TI - Automated quantitative RNA in situ hybridization for resolution of equivocal and heterogeneous ERBB2 (HER2) status in invasive breast carcinoma. PG - 210-9 LID - S1525-1578(12)00315-7 [pii] LID - 10.1016/j.jmoldx.2012.10.003 [doi] AB - Patient management based on HER2 status in breast carcinoma is an archetypical example of personalized medicine but remains hampered by equivocal testing and intratumoral heterogeneity. We developed a fully automated, quantitative, bright-field in situ hybridization technique (RNAscope), applied it to quantify single-cell HER2 mRNA levels in 132 invasive breast carcinomas, and compared the results with those by real-time quantitative PCR (qPCR) and Food and Drug Administration-approved methods, including fluorescence in situ hybridization (FISH), IHC, chromogenic in situ hybridization, and dual in situ hybridization. Both RNAscope and qPCR were 97.3% concordant with FISH in cases in which FISH results were unequivocal. RNAscope was superior to qPCR in cases with intratumoral heterogeneity or equivocal FISH results. This novel assay may enable ultimate HER2 status resolution as a reflex test for current testing algorithms. Quantitative in situ RNA measurement at the single-cell level may be broadly applicable in companion diagnostic applications. CI - Copyright (c) 2013 American Society for Investigative Pathology and the Association for Molecular Pathology. Published by Elsevier Inc. All rights reserved. FAU - Wang, Zhen AU - Wang Z AD - Department of Molecular Pathology, Cleveland Clinic, Cleveland, Ohio 44195, USA. FAU - Portier, Bryce P AU - Portier BP FAU - Gruver, Aaron M AU - Gruver AM FAU - Bui, Son AU - Bui S FAU - Wang, Hongwei AU - Wang H FAU - Su, Nan AU - Su N FAU - Vo, Hong-Thuy AU - Vo HT FAU - Ma, Xiao-Jun AU - Ma XJ FAU - Luo, Yuling AU - Luo Y FAU - Budd, G Thomas AU - Budd GT FAU - Tubbs, Raymond R AU - Tubbs RR LA - eng PT - Journal Article DEP - 20130108 PL - United States TA - J Mol Diagn JT - The Journal of molecular diagnostics : JMD JID - 100893612 RN - 0 (RNA, Messenger) RN - EC 2.7.10.1 (Receptor, ErbB-2) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Breast Neoplasms/diagnosis/*genetics/*pathology MH - Breast Neoplasms, Male/diagnosis/genetics/pathology MH - Carcinoma/diagnosis/*genetics/*pathology MH - Female MH - Humans MH - *In Situ Hybridization/methods MH - In Situ Hybridization, Fluorescence MH - Male MH - Middle Aged MH - Neoplasm Grading MH - Neoplasm Invasiveness MH - Neoplasm Staging MH - *RNA, Messenger MH - Receptor, ErbB-2/*genetics MH - Sensitivity and Specificity EDAT- 2013/01/12 06:00 MHDA- 2013/08/09 06:00 CRDT- 2013/01/12 06:00 PHST- 2012/06/04 00:00 [received] PHST- 2012/10/04 00:00 [revised] PHST- 2012/10/12 00:00 [accepted] PHST- 2013/01/12 06:00 [entrez] PHST- 2013/01/12 06:00 [pubmed] PHST- 2013/08/09 06:00 [medline] AID - S1525-1578(12)00315-7 [pii] AID - 10.1016/j.jmoldx.2012.10.003 [doi] PST - ppublish SO - J Mol Diagn. 2013 Mar;15(2):210-9. doi: 10.1016/j.jmoldx.2012.10.003. Epub 2013 Jan 8.