Abstract:
:Resistance to antineoplastic drugs is a major problem in the clinical management of cancer. Previous studies have demonstrated that the cytotoxicity of certain anticancer drugs is increased by lowering the glutathione (GSH) levels with buthionine sulfoximine (BSO), a specific inhibitor of gamma-glutamylcysteine synthetase. In this study we report that the resistance to doxorubicin, an anthracycline antibiotic and the most active agent in the treatment of breast cancer, can be partially reversed by exposing MCF-7 doxorubicin-resistant breast tumor cells (MCF-7/ADRR) to minimally cytotoxic doses of BSO. We found that the BSO treatment (50 microM, 48 h) of MCF-7/ADRR cells resulted in 80 to 90% depletion in total GSH concentrations. The toxicity of doxorubicin, as determined by growth inhibition and clonogenic assays, was significantly potentiated in the BSO-treated GSH-depleted cells relative to control breast tumor cells, and a dose-modifying factor of 5 to 7 was observed. Since the cytotoxicity of doxorubicin has been associated with its ability to undergo enzymatic activation and to form hydroxyl (OH) radicals in this cell line, we also quantitated the OH formation in the BSO-treated and untreated MCF-7/ADRR cells using electron spin resonance spintrapping techniques. These results show that doxorubicin stimulated at least 2-fold more OH formation in the tumor cells after GSH levels were decreased by 90%. These results indicate that GSH plays an important role in modulating doxorubicin-induced OH formation via the scavenging of hydrogen peroxide by glutathione peroxidase and thus partially protects MCF-7/ADRR cells from the cytotoxic effect of doxorubicin.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Dusre L,Mimnaugh EG,Myers CE,Sinha BKsubject
Has Abstractpub_date
1989-02-01 00:00:00pages
511-5issue
3eissn
0008-5472issn
1538-7445journal_volume
49pub_type
杂志文章相关文献
CANCER RESEARCH文献大全abstract::An immunogenic tumor and a nonimmunogenic tumor were used in C57BL/Ka and CBA/Rij mice, respectively, in a study in which lymph node morphology was quantitatively measured. Lymph nodes were cut in semiseries, and a morphometrical analysis was done on the paracortical and cortical areas as major parts of the active lym...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1978-03-01 00:00:00
abstract::Elevated expression of Bmi-1 is associated with many cancers, including breast cancer. Here, we examined the oncogenic potential of Bmi-1 in MCF10A cells, a spontaneously immortalized, nontransformed strain of human mammary epithelial cells (HMEC). Bmi-1 overexpression alone in MCF10A cells did not result in oncogenic...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-07-1636
更新日期:2007-11-01 00:00:00
abstract::Expression of cyclooxygenase (COX)-2 protein in 4-nitroquinoline-1-oxide (4-NQO)-induced rat tongue lesions and the postinitiation chemopreventive potential of a selective COX-2 inhibitor, nimesulide (NIM), were examined in Fischer 344 male rats. NIM was administered in the diet at doses of 150, 300, and 600 ppm for 1...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2001-02-15 00:00:00
abstract::The biosynthesis of distinct prostatic and lysosomal acid phosphatases is demonstrated using a human prostatic carcinoma cell line, PC-3SF12. The biosynthesis and maturation of the acid phosphatases was studied by metabolic labeling with radioactive leucine, specific immunoprecipitation, sodium dodecyl sulfate-polyacr...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1986-09-01 00:00:00
abstract::A major goal of cancer research is to match specific therapies to molecular targets in cancer. Genome-scale expression profiling has identified new subtypes of cancer based on consistent patterns of variation in gene expression, leading to improved prognostic predictions. However, how these new genetic subtypes of can...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-07-0382
更新日期:2008-01-15 00:00:00
abstract::We have studied the effects of low-power-density microwave (MW) radiation (continuous and pulsed wave with average power density of 10 milliwatts/sq cm and range of 5 to 50 milliwatts/sq cm; frequency, 1.0 GHz) on the uptake and action of methotrexate (MTX), the inhibition of DNA synthesis in L1210 murine leukemia cel...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1980-04-01 00:00:00
abstract::Antiangiogenic tumor therapies have recently attracted intense interest for their broad-spectrum action, low toxicity, and, in the case of direct endothelial targeting, an absence of drug resistance. To promote tumor regression and to maintain dormancy, antiangiogenic agents need to be chronically administered. Gene t...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1998-12-15 00:00:00
abstract::Two commonly occurring genetic aberrations of human prostate cancer [i.e., overexpression of a mitogenic polypeptide (fibroblast growth factor 8, isoform b or FGF8b) and loss of function of PTEN tumor suppressor] were recapitulated into a new combinatorial mouse model. This model harboring the Fgf8b transgene and hapl...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-05-3440
更新日期:2006-02-15 00:00:00
abstract::Expression of transforming growth factor beta 1 (TGF beta 1) protein was examined in chemically induced benign skin tumors with genetically defined empirical risks for malignant conversion. Benign tumors induced in mice which have both alleles of the p53 gene deleted have a malignant conversion frequency of approximat...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1994-11-15 00:00:00
abstract::Breast cancer resistance protein (BCRP), also called ABCG2, confers resistance to anticancer agents such as 7-ethyl-10-hydroxycamptothecin (SN-38), mitoxantrone, and topotecan. We found previously that sulfated estrogens are physiologic substrates of BCRP. Flavonoids with weak estrogenic activities are called phytoest...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-04-0078
更新日期:2004-06-15 00:00:00
abstract::Peripheral blood monocytes were isolated from normal human donors by separation on a continuous Percoll gradient and adherence to yield preparations of blood monocytes with a high degree of purity (greater than 99%). The monocytes were incubated in vitro with medium alone or with multilamellar liposomes that contained...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1983-05-01 00:00:00
abstract::A potential tumor suppressor gene, STK11 , encoding a serine threonine kinase, has recently been identified on chromosome 19p13. Germ-line mutations of this gene have been found in patients with Peutz-Jeghers syndrome (PJS). To further investigate the relevance of STK11 mutations in PJS, we analyzed its coding sequenc...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1998-11-01 00:00:00
abstract::Ligand-induced activation of peroxisome proliferator-activated receptor gamma (PPARgamma) inhibits proliferation in cancer cells in vitro and in vivo; however, the downstream targets remain undefined. We report the identification of a peroxisome proliferator response element in the promoter region of the Na(+)/H(+) tr...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-09-0219
更新日期:2009-11-15 00:00:00
abstract::The ability of four steroids and three bile acids to promote the appearance of hyperplastic foci and hyperplastic nodules initiated by diethylnitrosamine (DEN) in the liver of male Fischer rats was tested and compared with that of the known promoter phenobarbital (PB, 0.05%) as a standard value. Two weeks after a sing...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1982-06-01 00:00:00
abstract::In this study, we have demonstrated the overexpression of cyclin D1 protein in 24 (92%) of 26 low-grade squamous intraepithelial lesions infected with low-risk human papillomaviruses (HPV 6, 11, 42, 43, and 44) and the absence of cyclin D1 expression in 25 (87%) of 29 lesions infected with high-risk HPVs (HPV 16, 18, ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1998-07-15 00:00:00
abstract::3q27 translocations affecting the BCL6 gene can involve not only immunoglobulin genes (IG) but also other as yet uncharacterized chromosomal loci as partners. Here, we describe cloning of the junctional area of a recurring translocation, t(3;6)(q27;p21), in non-Hodgkin's lymphoma of B-cell type and isolation of clones...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1997-01-01 00:00:00
abstract::Indirect immunofluorescence staining with a large battery of monoclonal antibodies of primary and autologous metastatic lesions removed from seven patients with melanoma has detected heterogeneity in the expression of various types of melanoma-associated antigens (MAAs), of distinct determinants of the high molecular ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1985-06-01 00:00:00
abstract::Heterozygous mutations in the BRCA1 gene predispose women to breast and ovarian cancer, while biallelic BRCA1 mutations are a cause of Fanconi anemia (FA), a rare genetic disorder characterized by developmental abnormalities, early-onset bone marrow failure, increased risk of cancers, and hypersensitivity to DNA-cross...
journal_title:Cancer research
pub_type: 评论,杂志文章
doi:10.1158/0008-5472.CAN-20-0486
更新日期:2020-10-01 00:00:00
abstract::Activin, a member of the transforming growth factor beta (TGFbeta) superfamily, regulates diverse processes, such as cellular growth and differentiation. There is increasing evidence that TGFbeta and its signaling effectors are key determinants of tumor cell behavior. Loss of sensitivity to TGFbeta-induced growth arre...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-07-0805
更新日期:2007-08-01 00:00:00
abstract::Radiotherapy is used to treat many types of cancer, but many treated patients relapse with local tumor recurrence. Tumor-infiltrating myeloid cells (TIM), including CD11b (ITGAM)(+)F4/80 (EMR1)+ tumor-associated macrophages (TAM), and CD11b(+)Gr-1 (LY6G)+ myeloid-derived suppressor cells (MDSC), respond to cancer-rela...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-12-3981
更新日期:2013-05-01 00:00:00
abstract::To identify methylation-mediated silencing of genes in hepatocellular carcinoma (HCC), we surveyed genes induced by treatment with 5-aza-2'-deoxycytidine (5-Aza-CdR) in six human hepatoma cell lines using cDNA microarray analysis and determined the methylation status of 5' CpG islands by bisulfite DNA sequencing or me...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2003-12-15 00:00:00
abstract::Treatment of 9L rat brain tumor cells with 1.0 mM alpha-difluoromethylornithine (DFMO) produced a time-dependent depletion of cellular putrescine and spermidine. An increase in the potentiation of 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) cytotoxicity, measured with a colony-forming efficiency assay, followed the ti...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1984-05-01 00:00:00
abstract::Cachexia is a life-threatening wasting syndrome lacking effective treatment, which arises in many cancer patients. Although ostensibly induced by multiple tumor-produced cytokines (tumorkines), their functional contribution to initiation and progression of this syndrome has proven difficult to determine. In this study...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-15-3152
更新日期:2016-09-15 00:00:00
abstract::We have examined the time course and patterns of covalent aflatoxin B1:DNA adducts produced within the ribosomal RNA gene sequences isolated from the liver nuclear DNA of aflatoxin B1-treated animals. Liver nuclear DNA was initially enriched in ribosomal DNA by cesium salt density centrifugation, and incubated under a...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1985-08-01 00:00:00
abstract::Checkpoint pathways help cells maintain genomic integrity, delaying cell cycle progression in response to various risks of fidelity, such as genotoxic stresses, compromised DNA replication, and impaired spindle control. Cancer cells frequently exhibit genomic instability, and recent studies showed that checkpoint path...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-06-3927
更新日期:2007-02-01 00:00:00
abstract::The standard systemic treatment for prostate cancer (PCa) is androgen ablation, which causes tumor regression by inhibiting activity of the androgen receptor (AR). Invariably, PCa recurs with a fatal androgen-refractory phenotype. Importantly, the growth of androgen-refractory PCa remains dependent on the AR through v...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-08-0594
更新日期:2008-07-01 00:00:00
abstract::Evasion of apoptosis is a hallmark of chronic lymphocytic leukemia (CLL), calling for new strategies to bypass resistance. Here, we provide first evidence that small-molecule X-linked inhibitor of apoptosis (XIAP) inhibitors in combination with the death receptor ligand tumor necrosis factor-related apoptosis-inducing...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-09-2604
更新日期:2009-12-01 00:00:00
abstract::This report describes the development and validation of quantitative microsatellite analysis (QuMA) for rapid measurement of relative DNA sequence copy number. In QuMA, the copy number of a test locus relative to a pooled reference is assessed using quantitative, real-time PCR amplification of loci carrying simple seq...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2000-10-01 00:00:00
abstract::A modified method was developed for measuring the frequency of variant erythrocytes at the glycophorin A locus using a single beam cell sorter (SBS). Fluorescein- or phycoerythrin-labeled monoclonal antibodies specific for the M or N glycophorin A alleles were used for the SBS assay. To prevent contamination of nuclea...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1989-02-01 00:00:00
abstract::Human tumor cells containing ras oncogenes display enhanced sensitivity to 1-beta-D-arabinofuranosylcytosine (Ara-C) and other deoxycytidine analogues (H-M. Koo, et al., Cancer Res., 56: 5211-5216, 1996). Human tumor cell lines with or without a ras oncogene as well as a pair of isogenic cell lines with one containing...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1999-12-15 00:00:00