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rdf:type | |
lifeskim:mentions | |
pubmed:dateCreated |
1994-7-20
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pubmed:abstractText |
A fluorouracil (FU)-resistant human carcinoma cell line (SGC-7901/R) was established in culture by progressively increasing the concentration of FU from 50 ng.ml-1 to 2.5 mg.ml-1. The cell line has been successfully subcultured for more than 150 passages during more than 2 years. Its degree of FU resistance was 139-fold vs that of FU sensitive cell line (SGC-7901/S), and the resistant phenotype was stable when cells were cultured for 23 passages in FU-free medium. The doubling time was 17.3 and 25.6 h for resistant cells and parental cells, respectively. Swiss (nu/nu) nude mice were used for the in vivo experiment, the FU-resistant cell line also exhibited resistance to FU and cross-resistance to mitomycin C. FU inhibited markedly the incorporation of [3H]UR into sensitive cells and only showed a 31.6% inhibition with FU 100 micrograms.ml-1 in resistant cells. For the incorporation of [3H]TdR into DNA, inhibitory rates were seen with different concentrations of FU in resistant cells. By morphologic observation, SGC-7901/R cells showed little secretion but without any tendency to glandular pattern. Their nuclei were allotype with enlarged perinuclear space and a few intranuclear pseudoinclusions. The mitotic phase of cells was found frequently. The phenotype of resistant cell line can be deduced more malignant than that of parental cell line.
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pubmed:language |
chi
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Nov
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pubmed:issn |
0253-9756
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
14 Suppl
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
S1-4
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:8010063-Animals,
pubmed-meshheading:8010063-Cell Division,
pubmed-meshheading:8010063-DNA, Neoplasm,
pubmed-meshheading:8010063-Drug Resistance,
pubmed-meshheading:8010063-Fluorouracil,
pubmed-meshheading:8010063-Humans,
pubmed-meshheading:8010063-Mice,
pubmed-meshheading:8010063-Mice, Nude,
pubmed-meshheading:8010063-Mitomycin,
pubmed-meshheading:8010063-Neoplasm Transplantation,
pubmed-meshheading:8010063-RNA, Neoplasm,
pubmed-meshheading:8010063-Stomach Neoplasms,
pubmed-meshheading:8010063-Tumor Cells, Cultured
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pubmed:year |
1993
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pubmed:articleTitle |
[Characterization of a fluorouracil-resistant human gastric carcinoma cell line and its morphological behavior].
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pubmed:affiliation |
Shanghai Institute of Materia Medica, Chinese Academy of Sciences.
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pubmed:publicationType |
Journal Article,
English Abstract
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