Amplification and Expression of Mdr1 Gene in a Multidrug Resistant Variant of Small Cell Lung Cancer Cell Line NCI-H69

Overview

Journal Br J Cancer

Specialty Oncology

Date 1989 Sep 1

PMID 2571355

Citations 16

Authors

J G Reeve

P H Rabbitts

P R Twentyman

Affiliations

Soon will be listed here.

Abstract

Amplification and expression of the mdr1 gene encoding P-glycoprotein have been studied in H69/LX4 a multidrug resistant variant (MDR) of small cell lung cancer (SCLC) cell line NCI-H69. Recently a second independently derived MDR variant of this cell line designated H69/AR was found by others not to show amplification, rearrangement or over-expression of the mdr1 gene. The present study reports that in marked contrast to H69/AR, H69/LX4 shows amplification and expression of the P-glycoprotein gene and raises the possibility that P-glycoprotein hyperexpression may be a clinically relevant component of MDR in some SCLC tumours.

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