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Expression of multidrug resistance gene mdr1 mRNA in a subset of normal bone marrow cells.

Publication ,  Journal Article
Marie, JP; Brophy, NA; Ehsan, MN; Aihara, Y; Mohamed, NA; Cornbleet, J; Chao, NJ; Sikic, BI
Published in: Br J Haematol
June 1992

The multidrug resistance gene mdr1, encoding P-glycoprotein (P-gp), can be expressed at high levels in tumour cells derived from normal tissues with constitutive high expression of this gene. In myelogenous leukaemia, the incidence of increased expression of mdr1 gene contrasts with the low expression of this gene in normal bone marrow (b.m.). To detect cells expressing mdr1 gene in normal and post-chemotherapy b.m., we used in situ RNA hybridization and RNA phenotyping by the polymerase chain reaction for mdr1 mRNA detection. The presence of P-gp was evaluated by immunocytochemistry with MRK16. Fifteen b.m. (eight normal and seven post chemotherapy) were tested by in situ hybridization and either PCR (three b.m.) or immunocytochemistry (11 b.m.) or both (one b.m.). With in situ mRNA hybridization, a subset (7.7% +/- 3.1%) of b.m. cells expressed mdr1 mRNA in all cases tested, with no significant differences between normal b.m. and post chemotherapy b.m. 18% of myeloid recognizable cells and 7% of the cells with lymphoid morphology expressed mdr1 mRNA. By RNA phenotyping, the four samples tested for in situ hybridization and two additional post chemotherapy b.m. expressed mdr1. MRK16 was unable to detect a significant number of cells expressing P-gp either by immunocytochemistry in the 12 b.m. tested for in situ hybridization (0% in nine cases; 0.4%, 1% and 3% of positive cells in three cases), or by flow cytometry in six additional normal b.m. (0-1.4% positive cells).

Duke Scholars

Published In

Br J Haematol

DOI

ISSN

0007-1048

Publication Date

June 1992

Volume

81

Issue

2

Start / End Page

145 / 152

Location

England

Related Subject Headings

  • RNA, Messenger
  • RNA Probes
  • Polymerase Chain Reaction
  • Phenotype
  • Nucleic Acid Hybridization
  • Middle Aged
  • Membrane Glycoproteins
  • Immunology
  • Immunohistochemistry
  • Humans
 

Citation

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Marie, J. P., Brophy, N. A., Ehsan, M. N., Aihara, Y., Mohamed, N. A., Cornbleet, J., … Sikic, B. I. (1992). Expression of multidrug resistance gene mdr1 mRNA in a subset of normal bone marrow cells. Br J Haematol, 81(2), 145–152. https://doi.org/10.1111/j.1365-2141.1992.tb08199.x
Marie, J. P., N. A. Brophy, M. N. Ehsan, Y. Aihara, N. A. Mohamed, J. Cornbleet, N. J. Chao, and B. I. Sikic. “Expression of multidrug resistance gene mdr1 mRNA in a subset of normal bone marrow cells.Br J Haematol 81, no. 2 (June 1992): 145–52. https://doi.org/10.1111/j.1365-2141.1992.tb08199.x.
Marie JP, Brophy NA, Ehsan MN, Aihara Y, Mohamed NA, Cornbleet J, et al. Expression of multidrug resistance gene mdr1 mRNA in a subset of normal bone marrow cells. Br J Haematol. 1992 Jun;81(2):145–52.
Marie, J. P., et al. “Expression of multidrug resistance gene mdr1 mRNA in a subset of normal bone marrow cells.Br J Haematol, vol. 81, no. 2, June 1992, pp. 145–52. Pubmed, doi:10.1111/j.1365-2141.1992.tb08199.x.
Marie JP, Brophy NA, Ehsan MN, Aihara Y, Mohamed NA, Cornbleet J, Chao NJ, Sikic BI. Expression of multidrug resistance gene mdr1 mRNA in a subset of normal bone marrow cells. Br J Haematol. 1992 Jun;81(2):145–152.
Journal cover image

Published In

Br J Haematol

DOI

ISSN

0007-1048

Publication Date

June 1992

Volume

81

Issue

2

Start / End Page

145 / 152

Location

England

Related Subject Headings

  • RNA, Messenger
  • RNA Probes
  • Polymerase Chain Reaction
  • Phenotype
  • Nucleic Acid Hybridization
  • Middle Aged
  • Membrane Glycoproteins
  • Immunology
  • Immunohistochemistry
  • Humans