Affordable Access

Down-regulation of ras and myc expression associated with mdr-1 overexpression in adriamycin-resistant tumor cells.

Authors
  • Banerjee, S
  • Ganapathi, R
  • Ghosh, L
  • Yu, C L
Type
Published Article
Journal
Cellular and molecular biology
Publication Date
Sep 01, 1992
Volume
38
Issue
6
Pages
561–570
Identifiers
PMID: 1363885
Source
Medline
License
Unknown

Abstract

The murine melanoma tumor cells, B16-BL6, are a recognized model for experimental and spontaneous metastasis. B16-BL6 cells express a lower metastatic phenotype upon acquisition of resistance to adriamycin. Using this novel system, the role of ras, c-myc, and multidrug-resistant gene (mdr1) expression in the metastatic and drug-resistant phenotype was examined. The metastatic cells expressed a high level of c-Ki-ras and c-myc, whereas down-regulation of both proto-oncogenes was observed in the adriamycin-resistant cells. The mdr1 gene, which encodes P-glycoprotein of the drug-resistant superfamily gene, was overexpressed in drug-resistant melanoma cells. These results suggest that altered expression of genes that regulate cellular proliferation and growth may be a determinant of metastasis and drug sensitivity of tumor cells.

Report this publication

Statistics

Seen <100 times