Abstract | INTRODUCTION: METHODS: HER2 and HER3 overexpression/amplification were explored following internationally agreed guidelines using immunohistochemistry (IHC) and fluorescent in-situ hybridisation (FISH), respectively. Logistic regression and survival analysis (Kaplan Meier, Log rank test and Cox Regression) were used for statistical analysis. RESULTS: Sixty-seven eligible patients with Stage I/II (31.3%) or III/IV (68.7%) disease at diagnosis were included. Membrane HER2 overexpression/amplification was identified in 1 patient (1%). HER3 overexpression was predominantly cytoplasmic; the rate of overexpression/amplification of HER3 in membrane and cytoplasm was 16% [ampullary cancer ( AMP) (1/13; 8%), gallbladder cancer (GBC) (1/10; 10%), intra-hepatic cholangiocarcinoma (ICC) (6/26; 23%), extra-hepatic cholangiocarcinoma (ECC) (3/18; 17%)] and 24% [ AMP (1/13; 8%), GBC (1/10; 10%), ICC (10/26; 38%), ECC (4/18; 22%)], respectively. CONCLUSIONS: A significant subset of patients with BTC expressed HER3. Inhibition of HER3 warrants further investigation. A better understanding of the downstream effects of HER3 in BTC requires further mechanistic investigations to identify new biomarkers and improve patient selection for future clinical trials.
|
Authors | Angela Lamarca, Salvatore Galdy, Jorge Barriuso, Sharzad Moghadam, Elizabeth Beckett, Jane Rogan, Alison Backen, Catherine Billington, Mairéad G McNamara, Richard A Hubner, Angela Cramer, Juan W Valle |
Journal | PloS one
(PLoS One)
Vol. 13
Issue 10
Pg. e0206007
( 2018)
ISSN: 1932-6203 [Electronic] United States |
PMID | 30335866
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- ERBB2 protein, human
- Receptor, ErbB-2
- Receptor, ErbB-3
|
Topics |
- Aged
- Biliary Tract Neoplasms
(drug therapy)
- Computer Simulation
- Female
- Genome, Human
- Humans
- Male
- Middle Aged
- Molecular Targeted Therapy
- Multivariate Analysis
- Proportional Hazards Models
- Receptor, ErbB-2
(metabolism)
- Receptor, ErbB-3
(antagonists & inhibitors, metabolism)
- Signal Transduction
- Survival Analysis
|