Abstract:
:The effect of combinations of the anthracycline aclarubicin and the topoisomerase II targeting drugs 4'-demethylepipodophyllotoxin-9-(4,6-O-ethylidene-beta-D-glucopyra noside) (VP-16) and 4'-(9-acridinylamino)methanesulfon-m-anisidide (m-AMSA) was investigated in a clonogenic assay. The cytotoxicity of VP-16 was almost completely antagonized by preincubating cells with nontoxic concentrations of aclarubicin. The inhibition of cytotoxicity was not seen when the cells were exposed to aclarubicin after exposure to VP-16. The inhibition was significant over a wide range of aclarubicin concentrations (3 nM to 0.4 microM), above which the toxicity of aclarubicin became apparent. A similar effect was seen on the toxicity of m-AMSA. In contrast to aclarubicin, preincubation with Adriamycin did not antagonize the effect of VP-16. With purified topoisomerase II and naked DNA, aclarubicin did not stimulate the formation of cleavable complexes between topoisomerase II and DNA. Aclarubicin concentrations above 1 microM inhibited the baseline formation of cleavable complexes elicited with the enzyme alone. Low (1 to 10 nM) aclarubicin concentrations increased the formation of cleavable complexes obtained with VP-16 and m-AMSA; however, at aclarubicin concentrations above 1 microM an antagonistic effect was obtained. In cells, the m-AMSA- and VP-16-induced, protein-concealed DNA strand breaks were completely inhibitable by aclarubicin preincubation with no synergic dose levels. Our results suggest that aclarubicin inhibits topoisomerase II-mediated DNA cleavage. This inhibition could represent the mechanism of action of the drug and explain the lack of cross-resistance to the classical anthracyclines. The observed antagonism could have consequences for scheduling of aclarubicin with topoisomerase II-active anticancer drugs.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Jensen PB,Sørensen BS,Demant EJ,Sehested M,Jensen PS,Vindeløv L,Hansen HHsubject
Has Abstractpub_date
1990-06-01 00:00:00pages
3311-6issue
11eissn
0008-5472issn
1538-7445journal_volume
50pub_type
杂志文章相关文献
CANCER RESEARCH文献大全abstract::MYC exerts both positive and negative functions in cancer cells, such that its procancerous effects are unmasked only after its anticancer effects are blocked. Here we used multiple mouse models of lung adenocarcinoma to identify genetic events that can cooperate with MYC activation to promote the genesis of non-small...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-10-3590
更新日期:2011-03-15 00:00:00
abstract::Plasmids may have unique advantages as a gene delivery system. However, a major obstacle is the low in vivo transduction efficiency. In this study, an electroporation-based gene transduction approach was taken to study the effect of interleukin (IL)-2 or IL-12 gene transduction on the growth of experimental murine tum...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2001-04-15 00:00:00
abstract::We showed that the PEA3 transcriptional factor interacted with LKB1, a serine/threonine kinase, which is somatically mutated in lung cancer. This interaction occurred through the ETS domain of PEA3 and the kinase domain of LKB1. Mutation of LKB1 in lung cancer cells stabilized PEA3. Reintroduction of wild-type (WT) LK...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-05-2902
更新日期:2006-08-15 00:00:00
abstract::The human ether-a-go-go-related gene (herg) encodes a K+ current (IHERG) that plays a fundamental role in heart excitability by regulating the action potential repolarization (IKr); mutations of this gene are responsible for the chromosome 7-linked long QT syndrome (LQT2). In this report, we show that in a variety (n ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1998-02-15 00:00:00
abstract::Cancer-secreted, extracellular vesicle (EV)-encapsulated miRNAs enable cancer cells to communicate with each other and with noncancerous cells in tumor pathogenesis and response to therapies. Here, we show that treatment with a sublethal dose of chemotherapeutic agents induces breast cancer cells to secrete EV with th...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-18-4055
更新日期:2019-07-15 00:00:00
abstract::Insulin-like growth factors (IGFs) have mitogenic and antiapoptotic properties and have been implicated in the development of lung cancer. The effects of IGFs are modulated by insulin-like growth factor binding proteins (IGFBPs). This study explored the effects of IGFBP-3 on non-small cell lung cancer (NSCLC) cells af...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2002-06-15 00:00:00
abstract::Morris 7777 hepatoma cells, maintained in culture for 5 days in Lewis medium supplemented with 0.1 to 0.35 mM cis-unsaturated fatty acid of the oleic (number of carbon atoms: number of double bonds, 18:1), linoleic (18:2), or arachidonic (20:4) type, were compared to similarly maintained, unsupplemented cells as to ul...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1982-11-01 00:00:00
abstract::The INK4a/ARF locus encodes two distinct tumor suppressors, p16INK4a and p14ARF. Although the contribution of p16INK4a to human tumorigenesis through point mutation, deletion, and hypermethylation has been widely documented, little is known about specific p14ARF lesions and their consequences. Recent data indicate tha...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2001-04-01 00:00:00
abstract::Suppression of synthesis of specific tropomyosin (TM) isoforms occurs commonly in human, murine, and avian fibroblasts transformed by retroviral oncogenes or other modalities. The resulting deficiency or altered distribution of TMs may predispose the cells to microfilament instability and contribute to expression of t...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1990-04-01 00:00:00
abstract::Overexpression of the prosurvival Bcl-2 family members (Bcl-2, Bcl-xL, and Mcl-1) is commonly associated with tumor maintenance, progression, and chemoresistance. We previously reported the discovery of ABT-737, a potent, small-molecule Bcl-2 family protein inhibitor. A major limitation of ABT-737 is that it is not or...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-07-5836
更新日期:2008-05-01 00:00:00
abstract::H2AX phosphorylation is an early step in the response to DNA damage. It is widely accepted that ATM (ataxia telangiectasia mutated protein) phosphorylates H2AX in response to DNA double-strand breaks (DSBs). Whether DNA-dependent protein kinase (DNA-PK) plays any role in this response is unclear. Here, we show that H2...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.can-03-3207
更新日期:2004-04-01 00:00:00
abstract::Effect of pretransplantation hyperthermia of tumor bed on tumor growth was studied. Experimental tumors were isotransplants of a fibrosarcoma which arose spontaneously in C3Hf/Sed mice. The pretransplantation hyperthermia was given at 43.5 degrees fro 120 min by immersing the mouse foot into a constant temperature wat...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1980-01-01 00:00:00
abstract::c-abl, c-fos, c-Ha-ras, c-myc, and c-mos were expressed whereas c-sis, c-fms, c-rel, c-src, and c-myb expression was not detectable in C3H/10T1/2 Cl 8 (10T1/2) cells and in eight chemically and radiation-transformed 10T1/2 cell lines. The expression of c-abl, c-fos, c-Ha-ras, and c-myc was growth-related in nontransfo...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1986-10-01 00:00:00
abstract::Functional studies using freshly isolated tumor-infiltrating B lymphocytes(TIB) are difficult to perform and interpret. Here we document a novel function of TIB using fresh human lung cancer tissues engrafted in SCID mice; they are at activated state and produce tumor-specific antibodies in tumor microenvironment: (a)...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2002-03-15 00:00:00
abstract::Benz(a)anthracene (BA) and its five possible trans-dihydrodiols were evaluated for determination of their skin tumor-initiating activity and their mutagenic activity in Chinese hamster V79 cells. In addition, the skin tumor-initiating abilities of five diol-epoxides of BA were tested. Results showed (+/-)-trans-3,4-di...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1978-06-01 00:00:00
abstract::Metastatic cases of breast cancer pose the primary challenge in clinical management of this disease, demanding the identification of effective therapeutic strategies that remain wanting. In this study, we report that elevated levels of α-tubulin acetylation are a sufficient cause of metastatic potential in breast canc...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-13-3563
更新日期:2015-01-01 00:00:00
abstract::The cells of many solid tumors have been found to contain supernumerary centrosomes, a condition known as centrosome amplification. Centrosome amplification, accompanied by the overexpression of an associated kinase, Aurora A (AurA), has been implicated in mechanisms leading to mitotic spindle aberrations, aneuploidy,...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2002-07-15 00:00:00
abstract::Although monoallelic expression (MAE) is a frequent genomic event in normal tissues, its role in tumorigenesis remains unclear. Here we carried out single-nucleotide polymorphism arrays on DNA and RNA from a large cohort of pediatric and adult brain tumor tissues to determine the genome-wide rate of MAE, its role in s...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-11-2266
更新日期:2012-02-01 00:00:00
abstract::nm23 was originally identified as an antimetastatic gene, the expression of which was inversely correlated with tumor metastatic potential in rodent model systems. Subsequently, two related human nm23 genes, nm23-H1 and nm23-H2, were identified. The relationship between expression of nm23-H1 and nm23-H2 in hepatocellu...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1995-02-01 00:00:00
abstract::To directly examine a multistage carcinogenesis model and the role of UV light in human tissues, we grafted human skin onto mice with severe combined immunodeficiency disease. We found that the maximum dose of UV radiation in the B range (UVB; 280-320 nm) tolerated by these grafts was 500 J/m2 three times weekly. One ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1996-02-15 00:00:00
abstract::A comprehensive description of genomic alterations in lung squamous cell carcinoma (lung SCC) has recently been reported, enabling the identification of genomic events that contribute to the oncogenesis of this disease. In lung SCC, one of the most frequently altered receptor tyrosine kinase families is the fibroblast...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-12-3950
更新日期:2013-08-15 00:00:00
abstract::Small cell lung cancer (SCLC) produces several neuroendocrine peptides, including gastrin-releasing peptide (GRP), the mammalian equivalent of bombesin. There is some evidence to support the suggestion that GRP is an autocrine regulator of SCLC growth. Therefore, we have tested the effect of bombesin and two antagonis...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1988-09-01 00:00:00
abstract::The transcription factor NRF2 (NFE2L2) is a pivotal activator of genes encoding cytoprotective and detoxifying enzymes that limit the action of cytotoxic therapies in cancer. NRF2 acts by binding antioxidant response elements (ARE) in its target genes, but there is relatively limited knowledge about how it is negative...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-12-3386
更新日期:2013-05-15 00:00:00
abstract::Two molecular species of the pleotropic cytokine interleukin 1 (IL-1) are produced as products of two distinct genes transcribed by cells of the monocyte-macrophage lineage. We have shown previously that a significant proportion of human melanoma cell lines express IL-1 biological activity, but it has not been demonst...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1991-06-15 00:00:00
abstract::A possible involvement of gender-dependent factors has been postulated in development of human non-small-cell lung cancers (NSCLC), but its details remain unclear. In this study, we examined biological significance of progesterone receptor in NSCLCs. Progesterone receptor immunoreactivity was detected in 106 of 228 NS...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-04-3087
更新日期:2005-07-15 00:00:00
abstract::Drug sensitivity assays were performed using a variation of a colorimetric [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT)] assay on V79, CHO-AuxB1, CHRC5, NCI-H460, and NCI-H249 cell lines following optimization of experimental conditions for each cell line. Results from this assay were compared w...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1987-02-15 00:00:00
abstract::The data of nine monolayer cultures, 48 multicellular spheroids, and 19 s.c. xenografts of LoVo cells were fitted, on an individual basis, by exponential and Gompertzian equations, respectively. The mean growth parameters alpha 0 (initial growth rate) and beta (retardation factor) of the three experimental systems pre...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1989-12-01 00:00:00
abstract::Combining microtubule-targeting antimitotic drugs with targeted apoptosis potentiators is a promising new chemotherapeutic strategy to treat cancer. In this study, we investigate the cellular mechanism by which navitoclax (previously called ABT-263), a Bcl-2 family inhibitor, potentiates apoptosis triggered by paclita...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-10-4336
更新日期:2011-07-01 00:00:00
abstract::PTEN/MMAC1 is a major new tumor suppressor gene that encodes a dual-specificity phosphatase with sequence similarity to the cytoskeletal protein tensin. Recently, we reported that PTEN dephosphorylates focal adhesion kinase (FAK) and inhibits cell migration, spreading, and focal adhesion formation. Here, the effects o...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1999-01-15 00:00:00
abstract::EphA2 receptor tyrosine kinase is frequently overexpressed in different human cancers, suggesting that it may promote tumor development and progression. However, evidence also exists that EphA2 may possess antitumorigenic properties, raising a critical question on the role of EphA2 kinase in tumorigenesis in vivo. We ...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-06-0004
更新日期:2006-07-15 00:00:00