Abstract:
:Decreased BRCA1 expression in the absence of genetic mutation is observed frequently in sporadic cancers of the breast and other sites, although little is known regarding the mechanisms by which the expression of this gene can be repressed. Here, we show that activating and repressive E2Fs simultaneously bind the BRCA1 promoter at two adjacent E2F sites in vivo, and that hypoxia induces a dynamic redistribution of promoter occupancy by these factors resulting in the transcriptional repression of BRCA1 expression. Functionally, we show that hypoxia is associated with impaired homologous recombination, whereas the nonhomologous end-joining (NHEJ) repair pathway is unaffected under these conditions. Repression of BRCA1 expression by hypoxia represents an intriguing mechanism of functional BRCA1 inactivation in the absence of genetic mutation. We propose that hypoxia-induced decreases in BRCA1 expression and consequent suppression of homologous recombination may lead to genetic instability by shifting the balance between the high-fidelity homologous recombination pathway and the error-prone NHEJ pathway of DNA repair. Furthermore, these findings provide a novel link between E2Fs and the transcriptional response to hypoxia and provide insight into the mechanisms by which the tumor microenvironment can contribute to genetic instability in cancer.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Bindra RS,Gibson SL,Meng A,Westermark U,Jasin M,Pierce AJ,Bristow RG,Classon MK,Glazer PMdoi
10.1158/0008-5472.CAN-05-2119subject
Has Abstractpub_date
2005-12-15 00:00:00pages
11597-604issue
24eissn
0008-5472issn
1538-7445pii
65/24/11597journal_volume
65pub_type
杂志文章相关文献
CANCER RESEARCH文献大全abstract::The glutathione transferase (GST) isoenzyme profile was determined in two human tumor cell lines, U1690 derived from a small cell lung cancer and U1810 derived from a non-small cell lung cancer. U1810 cells are 3.2-fold more resistant to 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) than are U1690 cells, a finding ascri...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1993-09-15 00:00:00
abstract::Current standard of care for patients with pediatric acute lymphoblastic leukemia (ALL) is mainly effective, with high remission rates after treatment. However, the genetic perturbations that give rise to this disease remain largely undefined, limiting the ability to address resistant tumors or develop less toxic targ...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-16-1303
更新日期:2017-01-15 00:00:00
abstract::The cytotoxic effect of methotrexate (MTX) for mouse bone marrow cells has been studied by in vitro of the granulocyte precursor cell (CFU-C) in a medium containing dialyzed fetal calf serum and dialyzed L-cell supernatant. The formation of 50-cell colonies was inhibited to 50% of control by 10(-8) M MTX. Further incr...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1976-12-01 00:00:00
abstract::(+-)-2-[Hydroxy[tetrahydro-2-(octadecyloxy)methylfuran-2- yl]methoxyl]phosphinyloxy-N,N,N-trimethylethaniminium hydroxide, inner salt (SRI 62-834) is a tetrahydrofuran analogue of platelet activating factor (PAF) that is currently entering clinical trial. Like other ether lipids it is of interest as a membrane-active ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1991-02-01 00:00:00
abstract::Angiogenesis is essential for tumor growth and metastasis. It is regulated by numerous angiogenic factors, one of the most important being vascular endothelial growth factor (VEGF). Recently VEGF-B and VEGF-C, two new VEGF family members, have been identified that bind to the tyrosine kinase receptors flt-1 (VEGFR1), ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2001-04-01 00:00:00
abstract::A series of rat 13762NF mammary adenocarcinoma cell clones and subclones of various lung metastatic potentials were examined for their abilities to degrade rat lung subendothelial matrix and purified basement membrane type IV collagen. Metastatic potentials were simultaneously determined based on the ability to form "...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1987-09-15 00:00:00
abstract::Human epithelial tumor progression and metastasis involve cellular invasion, dissemination in the vasculature, and regrowth at metastatic sites. Notch signaling has been implicated in metastatic progression but its roles have yet to be fully understood. Here we report the important role of Notch signaling in maintaini...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-11-0543
更新日期:2011-07-15 00:00:00
abstract::Fatigue is the most common symptom of cancer at diagnosis, yet causes and effective treatments remain elusive. As tumors can be highly inflammatory, it is generally accepted that inflammation mediates cancer-related fatigue. However, evidence to support this assertion is mostly correlational. In this study, we directl...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-17-2168
更新日期:2018-02-01 00:00:00
abstract::A simple technique is described for fixing colony-containing layers of soft agar and drying them onto microscopic slides. The method is extrapolated from techniques used in immunology for permanent preservation of immunodiffusion or immunoelectrophoresis plates. Slides prepared in this fashion are eminently suitable f...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1979-03-01 00:00:00
abstract::Pim serine/threonine kinases contribute to prostate tumorigenesis and therapeutic resistance, yet Pim kinase inhibitors seem to have only limited effects on prostate cancer cell survival. Because overexpression of Bcl-2 family members are implicated in chemotherapeutic resistance in prostate cancer, we investigated th...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-11-3240
更新日期:2012-01-01 00:00:00
abstract::The effect of phenobarbital (PB) pretreatment of rats on both hepatic aflatoxin B1 (AFB1)-DNA binding and AFB1-glutathione (AFB1-SG) conjugation have been examined in studies in vivo and in vitro. Male Sprague-Dawley rats fed a commercial diet with 0.1% PB in their drinking water for 1 week had total wet liver weight ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1989-02-15 00:00:00
abstract::Sputum samples obtained during the screening phase of a chemoprevention trial in heavy smokers were evaluated independently by trained cytotechnologists and classified for degree of cellular atypia according to the method of Saccommano et al. (G. Saccommano et al., Cancer (Phila.), 33: 256-270, 1974). The level of agr...
journal_title:Cancer research
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1990-02-15 00:00:00
abstract::The growth of a panel of eight different human glioblastoma cell lines was examined in a human tumor cloning assay in agar, a tritiated thymidine uptake assay, and by counting cell numbers, in cultures performed in the absence or presence of increasing concentrations (1 to 100 ng/ml) of recombinant human stem cell fac...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1992-06-15 00:00:00
abstract::Driver tyrosine kinase mutations are rare in sarcomas, and patterns of tyrosine phosphorylation are poorly understood. To better understand the signaling pathways active in sarcoma, we examined global tyrosine phosphorylation in sarcoma cell lines and human tumor samples. Anti-phosphotyrosine antibodies were used to p...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-11-3015
更新日期:2012-05-15 00:00:00
abstract::Increased protein expression of the G1 cyclins D1 and E is reported in invasive non-small cell lung carcinoma. However, during transformation of the bronchial epithelium, overexpression of these species occurs, and their relationship to aberrant expression of p53 and retinoblastoma (Rb) has not been described previous...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1999-05-15 00:00:00
abstract::Neuroblastoma (NB) arises from primitive sympathetic neuroblasts in the adrenal gland or the sympathetic ganglion. NB in situ, sometimes observed in the adrenal glands of autopsied infants, is considered to be a premalignant lesion that may develop into NB. Little is understood about the morphological and biochemical ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1987-06-01 00:00:00
abstract::In L1210 cells in culture, 3-deazaguanine (DG), a relatively new purine analog, was found to inhibit DNA and protein synthesis but not total RNA synthesis. The effect of the drug on protein synthesis was therefore further examined. Polyadenylic acid-containing RNA synthesis was not decreased by DG treatment, suggestin...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1982-10-01 00:00:00
abstract::Inherited mutations of the human BRCA2 gene confer increased risks for developing breast, ovarian, and several other cancers. Unlike previously described Brca2 knockout mice that display predominantly embryonic lethal phenotypes, we developed mice with a homozygous germ-line deletion of Brca2 exon 27 that exhibit a mo...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2002-02-15 00:00:00
abstract::We have used a transplantable experimental murine renal carcinoma (Renca) to evaluate the adjuvant immunotherapeutic potential of cytotoxic lymphocytes stimulated by in vitro incubation for 24 h with human recombinant interleukin 2 (rIL-2). The Renca tumor model is therapeutically challenging since, following intraren...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1986-07-01 00:00:00
abstract::Alpha-particle immunotherapy by targeted alpha-emitters or alpha-emitting isotope generators is a novel form of extraordinarily potent cancer therapy. A major impediment to the clinical use of targeted actinium-225 (225Ac) in vivo generators may be the radiotoxicity of the systemically released daughter radionuclides....
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-04-3096
更新日期:2005-06-01 00:00:00
abstract::Previous studies have shown that PC12 cells undergo apoptosis (programmed cell death) when deprived of serum. In the present study, we examined the relationship of this death process to the cell cycle. PC12 cell populations synchronized at different, specific phases of the cell cycle exhibit similar kinetics of cell d...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1995-03-15 00:00:00
abstract::Despite favorable responses to initial therapy, small-cell lung cancer (SCLC) relapse occurs within a year and exhibits resistance to multiple drugs. Because of limited accessibility of patient tissues for research purposes, SCLC patient-derived xenografts (PDX) have provided the best opportunity to address this limit...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-16-2874
更新日期:2017-08-15 00:00:00
abstract::Methotrexate [(+) amethopterin, L-MTX] has two carboxyl groups in its structure and is eliminated mainly by excretion into urine and bile. To investigate the biliary excretion mechanism of L-MTX, we performed in vivo and in vitro studies using mutant rats, Eisai hyperbilirubinemic rats (EHBRs), whose canalicular multi...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1997-08-15 00:00:00
abstract::About 30% of all colorectal cancers are thought to have a genetic basis and the known predisposing genes can only account for a small fraction of cases. A previous report suggested that a colorectal cancer candidate gene, explaining at least 20% of colorectal cancer cases with family history, was located within a 25 c...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-05-4074
更新日期:2006-05-15 00:00:00
abstract::The nucleotide sequence complexity of murine leukemia virus *MuLV)-related RNA has been measured by RNA-complementary DNA hybridization analysis in nuclear and cytoplasmic RNA isolated from liver and brain of low-leukemia-strain C57BL/6J mice of different ages. In these two tissues, an approximate 1.5- to 2-fold incre...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1980-03-01 00:00:00
abstract::The spontaneous sister chromatid exchanges (SCEs) and SCEs induced by 50 microM methyl methanesulfonate, 1 microM 4-nitroquinoline 1-oxide, and 5 microM 3-amino-1-methyl-5H-pyrido[4,3-b]indole were examined in phytohemagglutinin-activated peripheral lymphocytes from 53 healthy adult donors. The means of the mean spont...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1983-01-01 00:00:00
abstract::N'-[2-chloroethyl]-N[2-(methylsulfonyl) ethyl]-N'-nitrosourea (cystemustine),a chloroethylnitrosourea antineoplastic drug, provokes cellular proliferation inhibition and redifferentiation, but there was no cell death in B16 melanoma tumors. Because the phospholipid (Plp) metabolism is tightly involved in tumor growth ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2002-03-15 00:00:00
abstract::We have investigated the behavior of dissociated cells of a moderately differentiated Longnecker transplantable pancreatic acinar carcinoma (Longnecker et al., Cancer Lett., 7: 197-202, 1979) maintained in vitro on acellular seminiferous tubular basement membranes of rat testis. The tumor cells, which grow as solid ma...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1986-01-01 00:00:00
abstract::Monoclonal antibodies (MAbs) 123C3 and 123A8 generated against a membrane preparation of a small cell lung carcinoma (SCLC) specimen recognize not only SCLC and bronchial carcinoids but also a significant portion of non-small cell lung carcinomas (non-SCLC) of various histological types. Together with 13 other monoclo...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1990-02-15 00:00:00
abstract::The recent identification of cancer stem cells (CSCs) in multiple human cancers provides a new inroad to understanding tumorigenesis at the cellular level. CSCs are defined by their characteristics of self-renewal, multipotentiality, and tumor initiation upon transplantation. By testing for these defining characterist...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-08-0786
更新日期:2008-12-15 00:00:00