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Transformed human bronchial epithelial cells (beas-2b) alter the growth and morphology of normal human bronchial epithelial cells in vitro

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Normal human bronchial epithelial cells (BE) and adenovirus-12 SV40 hybrid virus transformed, non-tumorigenic human bronchial epithelial cells (BEAS-2B) were cultured for 7 days in a serum free hormone supplemented medium. BE cells after 3 days in culture were exposed to conditioned medium (CMt) from confluent BEAS-2B cells. By day 7, CMt-treated BE cells exhibited a lower colony forming efficiency (CFE), fewer cells per colony, and a reduced mitotic index (MI) and BrdU (bromodeoxyuridine) labeling index. CMt also enhanced the expression of a terminally differentiated squamous phenotype in BE cells. Cell free lysates from BEAS-2B cells (CFLt) had effects similar to CMt on the MI and morphology of BE cells. In contrast, CMt and CFLt did not inhibit the growth, or alter the morphology of BEAS-2B cells. Conditioned medium from BE cells (CMn) did not reduce the growth of BEAS-2B cells, and had little effect on the morphology of BE cells. In co-cultures

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Abbreviations

BE:

normal bronchial epithelial cells

BEAS-2B:

adenovirus-12 SV40 hybrid virus transformed bronchial epithelial cells

CMn :

conditioned medium from BE cells

CMt :

conditioned medium from BEAS-2B cells

CFn :

cell free lysate from BE cells

CFLt :

cell free lysate from BEAS-2B cells

BrdU:

bromodeoxyuridine

KGM:

keratinocyte growth medium

TGF-β:

transforming growth factor type β

NCI-LHC:

National Cancer Institute-Laboratory of Human Carcinogenesis

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Contribution No. 2801 from the Pathobiology Laboratory, University of Maryland.

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Albright, C.D., Jones, R.T., Hudson, E.A. et al. Transformed human bronchial epithelial cells (beas-2b) alter the growth and morphology of normal human bronchial epithelial cells in vitro . Cell Biol Toxicol 6, 379–398 (1990). https://doi.org/10.1007/BF00120804

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