Correlation of ROS1 Immunohistochemistry With
Journal
Archives of pathology & laboratory medicine
ISSN: 1543-2165
Titre abrégé: Arch Pathol Lab Med
Pays: United States
ID NLM: 7607091
Informations de publication
Date de publication:
06 2020
06 2020
Historique:
pubmed:
12
9
2019
medline:
10
10
2020
entrez:
12
9
2019
Statut:
ppublish
Résumé
The ability to determine To present analytical correlation of the VENTANA ROS1 (SP384) Rabbit Monoclonal Primary Antibody (ROS1 [SP384] antibody) with The immunohistochemistry (IHC) and FISH analytical comparison was assessed by using 122 non-small cell lung cancer samples that had both FISH (46 positive and 76 negative cases) and IHC staining results available. In addition, reverse transcription-polymerase chain reaction (RT-PCR) as well as DNA and RNA next-generation sequencing (NGS) were used to further examine the ROS1 status in cases that were discrepant between FISH and IHC, based on staining in the cytoplasm of 2+ or above in more than 30% of total tumor cells considered as IHC positive. Here, we define the consensus status as the most frequent result across the 5 different methods (IHC, FISH, RT-PCR, RNA NGS, and DNA NGS) we used to determine ROS1 status in these cases. Of the IHC scoring methods examined, staining in the cytoplasm of 2+ or above in more than 30% of total tumor cells considered as IHC positive had the highest correlation with a FISH-positive status, reaching a positive percentage agreement of 97.8% and negative percentage agreement of 89.5%. A positive percentage agreement (100%) and negative percentage agreement (92.0%) was reached by comparing ROS1 (SP384) using a cutoff for staining in the cytoplasm of 2+ or above in more than 30% of total tumor cells to the consensus status. Herein, we present a standardized staining protocol for ROS1 (SP384) and data that support the high correlation between ROS1 status and ROS1 (SP384) antibody.
Identifiants
pubmed: 31509456
doi: 10.5858/arpa.2019-0085-OA
doi:
Substances chimiques
Biomarkers, Tumor
0
Oncogene Proteins, Fusion
0
Proto-Oncogene Proteins
0
Protein-Tyrosine Kinases
EC 2.7.10.1
ROS1 protein, human
EC 2.7.10.1
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM