Immortalization and transformation of primary human airway epithelial cells by gene transfer

AS Lundberg, SH Randell, SA Stewart, B Elenbaas… - Oncogene, 2002 - nature.com
AS Lundberg, SH Randell, SA Stewart, B Elenbaas, KA Hartwell, MW Brooks, MD Fleming
Oncogene, 2002nature.com
One critical step in the development of a cancerous cell is its acquisition of an unlimited
replicative lifespan, the process termed immortalization. Experimental model systems
designed to study cellular transformation ex vivo have relied to date on the in vitro selection
of a subpopulation of cells that have become immortalized through treatment with chemical
or physical mutagens and the selection of rare clonal variants. In this study, we describe the
direct immortalization of primary human airway epithelial cells through the successive …
Abstract
One critical step in the development of a cancerous cell is its acquisition of an unlimited replicative lifespan, the process termed immortalization. Experimental model systems designed to study cellular transformation ex vivo have relied to date on the in vitro selection of a subpopulation of cells that have become immortalized through treatment with chemical or physical mutagens and the selection of rare clonal variants. In this study, we describe the direct immortalization of primary human airway epithelial cells through the successive introduction of the Simian Virus 40 Early Region and the telomerase catalytic subunit hTERT. Cells immortalized in this way are now responsive to malignant transformation by an introduced H-ras or K-ras oncogene. These immortalized human airway epithelial cells, which have been created through the stepwise introduction of genetic alterations, provide a novel experimental model system with which to study further the biology of the airway epithelial cell and to dissect the molecular basis of lung cancer pathogenesis.
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