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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
1989-1-23
pubmed:abstractText
A murine monoclonal antibody (MAb) specific to adriamycin-resistant K-562 (K-562/ADM) cells, MRK20, was found to react strongly with an 85-kDa protein present in K-562/ADM and adriamycin-resistant ovarian cancer (2780AD) cells. This protein was present at only very low levels in parental cells (K-562 and A2780), methotrexate-resistant K-562 cells (K-562/MTX3, K-562/MTX4 and K-562/MTX5) and cisplatin-resistant ovarian cells (KFr). Immunoelectron microscopically, the protein was found to be located on the cell membrane of K-562/ADM and 2780AD cells. Furthermore, the presence of the protein in various cell lines, normal tissues and surgical materials from patients given no anti-cancer agents was examined by immunocytochemistry and flow cytometry. MRK20 reacted with granulocytes, monocytes and endothelial cells in various tissues, but did not react with tissue macrophages. This 85-kDa protein recognized by MRK20 seems to be the second multidrug-resistance gene-encoded product appearing in adriamycin-resistant cancer cells, following the characterization of 170-180-kDa glycoprotein, and may be important for elucidating the multidrug-resistance mechanism relevant to adrimycin and Vinca alkaloids.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0910-5050
pubmed:author
pubmed:issnType
Print
pubmed:volume
79
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1101-10
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Cellular and tissue distribution of MRK20 murine monoclonal antibody-defined 85-kDa protein in adriamycin-resistant cancer cell lines.
pubmed:affiliation
Department of Pathology, University of Tokyo.
pubmed:publicationType
Journal Article