Mechanisms affecting peplomycin sensitivity of Chinese hamster cell lines.
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چکیده
منابع مشابه
Propranolol induced chromosomal aberrations in Chinese hamster ovary cell line
Propranolol (PL), a non-selective beta-blocker, is a cardiovascular drug widely used to treat hypertension. The present study was concerned with assessing the cytogenetic effects of this drug on Chinese hamster ovary (CHO) cell line. MTT assay was then carried out to determine the cytotoxicity index (IC50) of the drug. The IC50 value of PL was 0.43±0.02 mM. To investigate the clastogenic effect...
متن کاملCross-sensitivity to topoisomerase II inhibitors in cytotoxic drug-hypersensitive Chinese hamster ovary cell lines.
We have isolated a Chinese hamster ovary cell line, designated ADR-1, which exhibits hypersensitivity to a range of drugs which are thought to inhibit the action of the enzyme topoisomerase II. These include anthracyclines, other classes of intercalating agents, and the epipodophyllotoxin, etoposide. No significant sensitivity to radiation, or to mono- and bifunctional alkylating agents was see...
متن کاملIsolation of two chloroethylnitrosourea-sensitive Chinese hamster cell lines.
1-[(4-Amino-2-methylpyrimidin-5-yl)methyl]-3-(2-chloroethyl)-3- nitrosourea hydrochloride (ACNU), a cancer chemotherapeutic bifunctional alkylating agent, causes chloroethylation of DNA and subsequent DNA strand cross-linking through an ethylene bridge. We isolated and characterized two ACNU-sensitive mutants from mutagenized Chinese hamster ovary cells and found them to be new drug-sensitive r...
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Resistance to etoposide (VP-16), amsacrine (mAMSA), and doxorubicin (Adriamycin) was studied in two Chinese hamster cell lines primarily selected for resistance to the epipodophyllotoxin. Both lines demonstrated profound resistance to VP-16, and mAMSA stimulated DNA breakage. However, the resistance to mAMSA cytotoxicity in both lines was less than expected from the level of resistance to the e...
متن کاملMechanisms underlying epigenetic and transcriptional heterogeneity in Chinese hamster ovary (CHO) cell lines
BACKGROUND Recombinant cell lines developed for therapeutic antibody production often suffer instability or lose recombinant protein expression during long-term culture. Heterogeneous gene expression among cell line subclones may result from epigenetic modifications of DNA or histones, the protein component of chromatin. We thus investigated in such cell lines, DNA methylation and the chromatin...
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ژورنال
عنوان ژورنال: The Journal of Antibiotics
سال: 1985
ISSN: 0021-8820,1881-1469
DOI: 10.7164/antibiotics.38.1257