Carcinogen-induced mdr overexpression is associated with xenobiotic resistance in rat preneoplastic liver nodules and hepatocellular carcinomas

C. R. Fairchild, S. P. Ivy, T. Rushmore, G. Lee, P. Koo, M. E. Goldsmith, C. E. Myers, E. Farber, K. H. Cowan

Research output: Contribution to journalArticle

199 Citations (Scopus)

Abstract

We have previously reported the isolation of a human breast cancer cell line resistant to doxorubicin (adriamycin; Adr(R) MCF-7 cells) that has also developed the phenotype of multidrug resistance (MDR). MDR in this cell line is associated with increased expression of mdr (P glycoprotein) gene sequences. The development of MDR in Adr(R) MCF-7 cells is also associated with changes in the expression of several phase I and phase II drug-detoxifying enzymes. These changes are remarkably similar to those associated with development of xenobiotic resistance in rat hyperplasia liver nodules, a well-studied model system of chemical carcinogenesis. Using an mdr-encoded cDNA sequence isolated from Adr(R) MCF-7 cells, we have examined the expression of mdr sequences in rat livers under a variety of experimental conditions. The expression of mdr increased 3-fold in regenerating liver. It was also elevated (3- to 12-fold) in several different samples of rat hyperplastic nodules and in four of five hepatomas that developed in this system. This suggests that overexpression of mdr, a gene previously associated with resistance to antineoplastic agents, may also be involved in the development of resistance to xenobiotics in rat hyperplastic nodules. In addition, although the acute administration of 2-acetylaminofluorene induced an 8-fold increase in hepatic mdr-encoded RNA, performance of a partial hepatectomy either before or after administration of 2-acetylaminofluorene resulted in a > 80-fold increase in mdr gene expression over that in normal untreated livers. This represents an important in vivo model system in which to study the acute regulation of this drug resistance gene.

Original languageEnglish (US)
Pages (from-to)7701-7705
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume84
Issue number21
DOIs
StatePublished - Jan 1 1987

Fingerprint

Xenobiotics
Carcinogens
Hepatocellular Carcinoma
MCF-7 Cells
Multiple Drug Resistance
Liver
2-Acetylaminofluorene
Doxorubicin
Neoplasm Drug Resistance
Genes
Chemical Models
Cell Line
Hepatectomy
P-Glycoprotein
Drug Resistance
Hyperplasia
Carcinogenesis
Complementary DNA
RNA
Breast Neoplasms

ASJC Scopus subject areas

  • General

Cite this

Carcinogen-induced mdr overexpression is associated with xenobiotic resistance in rat preneoplastic liver nodules and hepatocellular carcinomas. / Fairchild, C. R.; Ivy, S. P.; Rushmore, T.; Lee, G.; Koo, P.; Goldsmith, M. E.; Myers, C. E.; Farber, E.; Cowan, K. H.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 84, No. 21, 01.01.1987, p. 7701-7705.

Research output: Contribution to journalArticle

Fairchild, C. R. ; Ivy, S. P. ; Rushmore, T. ; Lee, G. ; Koo, P. ; Goldsmith, M. E. ; Myers, C. E. ; Farber, E. ; Cowan, K. H. / Carcinogen-induced mdr overexpression is associated with xenobiotic resistance in rat preneoplastic liver nodules and hepatocellular carcinomas. In: Proceedings of the National Academy of Sciences of the United States of America. 1987 ; Vol. 84, No. 21. pp. 7701-7705.
@article{f370f83dff0f4b23886587dfc4ebb056,
title = "Carcinogen-induced mdr overexpression is associated with xenobiotic resistance in rat preneoplastic liver nodules and hepatocellular carcinomas",
abstract = "We have previously reported the isolation of a human breast cancer cell line resistant to doxorubicin (adriamycin; Adr(R) MCF-7 cells) that has also developed the phenotype of multidrug resistance (MDR). MDR in this cell line is associated with increased expression of mdr (P glycoprotein) gene sequences. The development of MDR in Adr(R) MCF-7 cells is also associated with changes in the expression of several phase I and phase II drug-detoxifying enzymes. These changes are remarkably similar to those associated with development of xenobiotic resistance in rat hyperplasia liver nodules, a well-studied model system of chemical carcinogenesis. Using an mdr-encoded cDNA sequence isolated from Adr(R) MCF-7 cells, we have examined the expression of mdr sequences in rat livers under a variety of experimental conditions. The expression of mdr increased 3-fold in regenerating liver. It was also elevated (3- to 12-fold) in several different samples of rat hyperplastic nodules and in four of five hepatomas that developed in this system. This suggests that overexpression of mdr, a gene previously associated with resistance to antineoplastic agents, may also be involved in the development of resistance to xenobiotics in rat hyperplastic nodules. In addition, although the acute administration of 2-acetylaminofluorene induced an 8-fold increase in hepatic mdr-encoded RNA, performance of a partial hepatectomy either before or after administration of 2-acetylaminofluorene resulted in a > 80-fold increase in mdr gene expression over that in normal untreated livers. This represents an important in vivo model system in which to study the acute regulation of this drug resistance gene.",
author = "Fairchild, {C. R.} and Ivy, {S. P.} and T. Rushmore and G. Lee and P. Koo and Goldsmith, {M. E.} and Myers, {C. E.} and E. Farber and Cowan, {K. H.}",
year = "1987",
month = "1",
day = "1",
doi = "10.1073/pnas.84.21.7701",
language = "English (US)",
volume = "84",
pages = "7701--7705",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
number = "21",

}

TY - JOUR

T1 - Carcinogen-induced mdr overexpression is associated with xenobiotic resistance in rat preneoplastic liver nodules and hepatocellular carcinomas

AU - Fairchild, C. R.

AU - Ivy, S. P.

AU - Rushmore, T.

AU - Lee, G.

AU - Koo, P.

AU - Goldsmith, M. E.

AU - Myers, C. E.

AU - Farber, E.

AU - Cowan, K. H.

PY - 1987/1/1

Y1 - 1987/1/1

N2 - We have previously reported the isolation of a human breast cancer cell line resistant to doxorubicin (adriamycin; Adr(R) MCF-7 cells) that has also developed the phenotype of multidrug resistance (MDR). MDR in this cell line is associated with increased expression of mdr (P glycoprotein) gene sequences. The development of MDR in Adr(R) MCF-7 cells is also associated with changes in the expression of several phase I and phase II drug-detoxifying enzymes. These changes are remarkably similar to those associated with development of xenobiotic resistance in rat hyperplasia liver nodules, a well-studied model system of chemical carcinogenesis. Using an mdr-encoded cDNA sequence isolated from Adr(R) MCF-7 cells, we have examined the expression of mdr sequences in rat livers under a variety of experimental conditions. The expression of mdr increased 3-fold in regenerating liver. It was also elevated (3- to 12-fold) in several different samples of rat hyperplastic nodules and in four of five hepatomas that developed in this system. This suggests that overexpression of mdr, a gene previously associated with resistance to antineoplastic agents, may also be involved in the development of resistance to xenobiotics in rat hyperplastic nodules. In addition, although the acute administration of 2-acetylaminofluorene induced an 8-fold increase in hepatic mdr-encoded RNA, performance of a partial hepatectomy either before or after administration of 2-acetylaminofluorene resulted in a > 80-fold increase in mdr gene expression over that in normal untreated livers. This represents an important in vivo model system in which to study the acute regulation of this drug resistance gene.

AB - We have previously reported the isolation of a human breast cancer cell line resistant to doxorubicin (adriamycin; Adr(R) MCF-7 cells) that has also developed the phenotype of multidrug resistance (MDR). MDR in this cell line is associated with increased expression of mdr (P glycoprotein) gene sequences. The development of MDR in Adr(R) MCF-7 cells is also associated with changes in the expression of several phase I and phase II drug-detoxifying enzymes. These changes are remarkably similar to those associated with development of xenobiotic resistance in rat hyperplasia liver nodules, a well-studied model system of chemical carcinogenesis. Using an mdr-encoded cDNA sequence isolated from Adr(R) MCF-7 cells, we have examined the expression of mdr sequences in rat livers under a variety of experimental conditions. The expression of mdr increased 3-fold in regenerating liver. It was also elevated (3- to 12-fold) in several different samples of rat hyperplastic nodules and in four of five hepatomas that developed in this system. This suggests that overexpression of mdr, a gene previously associated with resistance to antineoplastic agents, may also be involved in the development of resistance to xenobiotics in rat hyperplastic nodules. In addition, although the acute administration of 2-acetylaminofluorene induced an 8-fold increase in hepatic mdr-encoded RNA, performance of a partial hepatectomy either before or after administration of 2-acetylaminofluorene resulted in a > 80-fold increase in mdr gene expression over that in normal untreated livers. This represents an important in vivo model system in which to study the acute regulation of this drug resistance gene.

UR - http://www.scopus.com/inward/record.url?scp=0013659750&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0013659750&partnerID=8YFLogxK

U2 - 10.1073/pnas.84.21.7701

DO - 10.1073/pnas.84.21.7701

M3 - Article

C2 - 2890168

AN - SCOPUS:0013659750

VL - 84

SP - 7701

EP - 7705

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

SN - 0027-8424

IS - 21

ER -