Type

Journal Article

Authors

Norma O'Donovan
John Crown
Martin Clynes
Lorraine O'Driscoll
Brendan Corkery
Annemarie Larkin
Susan Kennedy
Naomi Walsh

Subjects

Pharmacology

Topics
her2 inhibition pancreatic cancer drug effect resistance immunohistochemistry egfr cancer cell lines

EGFR and HER2 inhibition in pancreatic cancer. (2012)

Abstract The aim of this study was to investigate the effect of lapatinib, a selective inhibitor of EGFR/HER2 tyrosine kinases, on pancreatic cancer cell lines both alone and in combination with chemotherapy. Two cell lines, BxPc-3 and HPAC, displayed the greatest sensitivity to lapatinib (IC(50) < 2 μM). Lapatinib also demonstrated some activity in three K-Ras mutated pancreatic cancer cell lines which displayed resistance to erlotinib. Drug effect/combination index (CI) isobologram analysis was used to study the interactions of lapatinib with gemcitabine, cisplatin and 5'deoxy-5'fluorouridine. Concentration-dependent anti-proliferative effects of lapatinib in combination with chemotherapy were observed. To evaluate the potential effect of lapatinib in pancreatic cancer tumours, and to identify a subset of patient most likely to benefit from lapatinib, expression of EGFR and HER2 were investigated in 72 pancreatic cancer tumour specimens by immunohistochemistry. HER2 membrane expression was observed in only 1 % of cases, whereas 44 % of pancreatic tumours expressed EGFR. Based on our in vitro results, lapatinib may provide clinical benefit in EGFR positive pancreatic ductal adenocarcinoma.
Collections Ireland -> Dublin City University -> PubMed

Full list of authors on original publication

Norma O'Donovan, John Crown, Martin Clynes, Lorraine O'Driscoll, Brendan Corkery, Annemarie Larkin, Susan Kennedy, Naomi Walsh

Experts in our system

1
Norma O'Donovan
Dublin City University
Total Publications: 52
 
2
John Crown
Dublin City University
 
3
Martin Clynes
Dublin City University
Total Publications: 209
 
4
Lorraine O'Driscoll
Trinity College Dublin
Total Publications: 152
 
5
Annemarie Larkin
Dublin City University
Total Publications: 25
 
6
Susan Kennedy
Dublin City University
Total Publications: 37
 
7
Naomi Walsh
Dublin City University
Total Publications: 18