Faculty Collaboration Database

Paxillin expression and amplification in early lung lesions of high-risk patients, lung adenocarcinoma and metastatic disease. J Clin Pathol 2011 Jan;64(1):16-24

Date

11/04/2010

Pubmed ID

21045234

Pubmed Central ID

PMC3002839

DOI

10.1136/jcp.2010.075853

Scopus ID

2-s2.0-78650807772 (requires institutional sign-in at Scopus site)   40 Citations

Abstract

BACKGROUND: Paxillin is a modular protein that localises to cell adhesion sites where it facilitates bidirectional communication between the intracellular actin cytoskeleton and the extracellular matrix. These complex and dynamic interactions are essential for cell adhesion, cell migration and cell survival. The authors have previously demonstrated that paxillin is overexpressed in lung cancer tissues and identified somatic paxillin mutations in 9% of lung cancers. A murine in vivo xenograft model of the most common paxillin mutation (A127T) showed increased cell proliferation and invasive tumour growth, establishing an important role for paxillin in the development of lung cancer.

METHODS: The authors analysed 279 bronchoscopy-aided biopsy specimens from 92 high-risk patients. Adenocarcinoma with bronchioloalveolar features and pure bronchioloalveolar carcinoma (BAC) were analysed with fluorescence in situ hybridisation (FISH) and immunohistochemistry (IHC).

RESULTS: Paxillin is overexpressed in premalignant areas of hyperplasia, squamous metaplasia and goblet cell metaplasia, as well as dysplastic lesions and carcinoma in high-risk patients. Concordance between increased paxillin gene copy number and paxillin overexpression was observed in cases of adenocarcinoma eusomic for chromosome 12.

CONCLUSIONS: Paxillin overexpression occurs during the earliest stages of lung cancer development. FISH and IHC analysis of lung adenocarcinoma suggests that relatively small-scale genomic rearrangements of chromosome 12 are associated with paxillin overexpression in lung adenocarcinoma.

Author List

Mackinnon AC, Tretiakova M, Henderson L, Mehta RG, Yan BC, Joseph L, Krausz T, Husain AN, Reid ME, Salgia R

MESH terms used to index this publication - Major topics in bold

Adenocarcinoma
Adenocarcinoma, Bronchiolo-Alveolar
Aged
Biopsy
Chromosomes, Human, Pair 12
Female
Gene Dosage
Genes, erbB-1
Humans
In Situ Hybridization, Fluorescence
Lung Neoplasms
Male
Middle Aged
Mutation
Neoplasm Proteins
Paxillin
Precancerous Conditions
Proto-Oncogene Proteins
Proto-Oncogene Proteins p21(ras)
ras Proteins