Abstract:
:In this communication we show that overexpression of the human TATA-binding protein (TBP) activates a synthetic promoter with p53-binding sites in the presence of wild-type p53. No activation is observed in the absence of wild-type p53 in Saos-2 cells. Perhaps, TBP is limiting in these cells for the p53-mediated activation, and p53 activates promoters with p53-binding sites via its interaction with TBP. Using in vivo transient transfection-transcription assays, we also show that wild-type human p53 inhibits simian virus 40 (SV40) late promoter transactivation by SV40 T antigen, but excess T antigen partially releases this inhibition. Recently both T antigen and p53 have been shown to interact with TBP. The inhibition of T antigen-mediated SV40 late promoter activation by p53 or the inhibition of p53-mediated activation of a promoter with p53-binding sites by T antigen is not released by an overexpression of TBP. Thus, the transcriptional antagonism between p53 and T antigen are not at the level of competition for TBP. Possibly, the two proteins poison each other so that they cannot interact with the transcription machinery.
journal_name
Int J Oncoljournal_title
International journal of oncologyauthors
Deb S,Brown D,Lega H,Deb Ssubject
Has Abstractpub_date
1995-01-01 00:00:00pages
243-9issue
1eissn
1019-6439issn
1791-2423journal_volume
6pub_type
杂志文章abstract::This study was designed to identify epigenetically regulated genes and to clarify the contribution of epige-netic alteration to acquired resistance to epidermal growth factor receptor‑tyrosine kinase inhibitors (EGFR‑TKIs). We established a gefitinib‑resistant lung cancer cell line, PC9, which was originally gefitinib...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2014.2733
更新日期:2015-01-01 00:00:00
abstract::Delivery of electric pulses to an established solid tumor augments the permeability of cell membrane and increases the susceptibility of tumors to an anti-cancer agent that is administered in the vicinity of tumors. Forced expression of the wild-type p53 gene in tumor cells that have non-functional p53 gene(s) can als...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.18.4.825
更新日期:2001-04-01 00:00:00
abstract::We investigated the relationship between cell growth and differentiation and COX-2 expression in oral squamous cell carcinoma (SCC) in vitro and in vivo. Treatment of SCC25 oral squamous carcinoma cells with sodium butyrate (SB) at 0.5-5 mM or all-trans retinoic acid (ATRA) at 3-300 microM inhibited cell growth and in...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2005-02-01 00:00:00
abstract::Among nutraceuticals, polyphenols represent the most intriguing and studied class of compounds that can be therapeutics for a large spectrum of the most common diseases, including cancer. Although polyphenols are well known as potent antioxidants, a pro-oxidant effect has been associated with a pro-apoptotic function ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2017.4088
更新日期:2017-09-01 00:00:00
abstract::Targeting protein kinases as a therapeutic approach to treat various diseases, especially cancer is currently a fast growing business. Although many inhibitors are available, exhibiting remarkable potency, the major challenge is their selectivity. Here we show that the protein kinase CK2 inhibitors DMAT, TBB and resor...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo_00000431
更新日期:2009-11-01 00:00:00
abstract::Loss of heterozygosity (LOH) or allelic deletion at various loci has been reported in the majority of human tumors. The frequently deleted targets are believed to be tumor suppressor genes. Recent studies have identified the APC and MCC genes at 5q21, as putative tumor suppressor genes. The APC and MCC genes have been...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.6.1.111
更新日期:1995-01-01 00:00:00
abstract::Cancer stem cells (CSCs) in glioma are often responsible for relapse and resistance to therapy. The purpose of the present study was to confirm the self-renewal and migration inhibitory effects of tetrandrine (Tet), which is a compound extracted from the dried root of Stephania tetrandra S. Moore, toward glioma stem-l...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2016.3780
更新日期:2017-01-01 00:00:00
abstract::Although radiation therapy is a powerful anticancer modality, radiation- induced stress response and gene expression with adaptive resistance may severely compromise the effectiveness of radiation. The function of rotundic acid (RA) on inducing apoptosis in the human breast cancer cell line MCF-7 has been investigated...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2018.4544
更新日期:2018-11-01 00:00:00
abstract::We have previously shown that growth of the oral squamous cell carcinoma cell line SAS, is resistant to cetuximab in monolayer culture conditions, even though epidermal growth factor receptor (EGFR) was phosphorylated, but the growth of SAS aggregates was sensitive to cetuximab. In the present study, we demonstrate di...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2015.3215
更新日期:2015-12-01 00:00:00
abstract::Antisense oligonucleotides have been investigated as anticancer agents administered alone or in combination with conventional chemotherapeutics. In the present study, we demonstrated synergistic effects between anti-MDM2 antisense oligonucleotides and the clinically used anticancer agent irinotecan, using nude mouse m...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2002-04-01 00:00:00
abstract::We established a new lymphoma cell line, designated CTB-1, from pericardial effusion of a patient with diffuse large B-cell lymphoma. This cell line showing vigorous growth ability has undergone 260 passages over a period of 34 months in suspension culture, and is heterotransplantable to nude mice. The cultured cells ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.10.6.1103
更新日期:1997-06-01 00:00:00
abstract::The potential of arsenic trioxide (As2O3) as a novel therapy against ovarian cancer has been progressively recognized. Its prospective usefulness for treatment of this malignancy either alone or in combination with other chemotherapeutic agents has been increasingly explored. In this study, we attempted to enhance the...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2011.986
更新日期:2011-06-01 00:00:00
abstract::Polypyrimidine tract-binding protein 1 (PTBP1), a heterogeneous nuclear ribonucleoprotein, is a multi-functional RNA-binding protein. PTBP1 participates in a number of biological processes, including maintaining cell structure and motility, immunity, protein metabolism and the cell cycle. The present study aimed to in...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2018.4296
更新日期:2018-05-01 00:00:00
abstract::Multidrug resistance (MDR) is one of the major reasons for the failure of chemotherapy-based gastric carcinoma (GC) treatments, hence, biologically based therapies are urgently needed. Gastrin (GAS), a key gastrointestinal (GI) hormone, was found to be involved in tumor formation, progression, and metastasis. In this ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2017.3983
更新日期:2017-06-01 00:00:00
abstract::Specific RE protein species modulated by autocrine TGF alpha are unknown. HCT116 cells transfected with TGF alpha antisense expression vector were compared with control HCT116 NEO for mitogenesis and modulation of high MW (130, 120 kD) and low MW (116, 110, 105 kD) RE species. Nutrients alone (N) induced maximal mitog...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.8.6.1025
更新日期:1996-06-01 00:00:00
abstract::The epidermal growth factor (EGF) receptor (EGFR) is activated by EGF and other EGF-like growth factors, including amphiregulin (AR). We characterized the localization and mitogenic action of AR in T3M4 and COLO-357 human pancreatic cancer cell lines and determined whether the presence of AR in human pancreatic cancer...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.6.3.625
更新日期:1995-03-01 00:00:00
abstract::Conventional diagnosis of prostate cancer does not appear to be sensitive enough to differentiate pre-operatively between organ-confined and extracapsular disease. New technologies, arising from the field of molecular biology, have been introduced to improve diagnosis and their implementation into the clinical practic...
journal_title:International journal of oncology
pub_type: 杂志文章,评审
doi:
更新日期:2005-03-01 00:00:00
abstract::MicroRNAs (miRNAs) are a large family of small, non-coding RNAs that play a pivotal role in tumorigenesis. miR‑34a, which is a member of the miR-34 family, is a downstream target of p53. Increasing evidence shows that miR-34a dysregulation may contribute to tumor development and progression in numerous cancers, includ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2017.4015
更新日期:2017-07-01 00:00:00
abstract::Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is promising for cancer treatment owing to its selective cytotoxicity against malignant cells. However, some cancer cell types, including malignant melanoma cells, are resistant to TRAIL-induced apoptosis. Therefore, dr...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2012.1483
更新日期:2012-08-01 00:00:00
abstract::The assembly of trans-acting proteins on sequence-specific DNA cis-elements is crucial in the regulation of eukaryotic gene expression. Far upstream element binding proteins (FAB) are proteins that regulate the expression of the c-myc oncogene by binding to the far upstream element of the c-myc gene. The present study...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2006-09-01 00:00:00
abstract::Rhabdomyosarcoma (RMS) is a malignant tumour of skeletal muscle origin which includes two major histological subtypes: alveolar rhabdomyosarcoma (ARMS), the more aggressive, and embryonal rhabdomyosarcoma (ERMS). In order to establish whether the higher metastatic potential of ARMS cells may depend on differential exp...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2005-09-01 00:00:00
abstract::Selectivity of the anticancer agent PB-100 for malignant cells, already demonstrated using cell growth and viability evaluation, is now confirmed by microscopic observations. PB-100 is easily detected inside cells by its yellow color under visible light and by its blue fluorescence; it may be measured in isolated nucl...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.7.1.81
更新日期:1995-07-01 00:00:00
abstract::We performed this study in order to evaluate the impact of the chemokine CXCL12 and its single-nucleotide polymorphism (SNP) rs1801157 on clinicopathological parameters and survival in patients undergoing surgery for esophagogastric cancer. The expression pattern of CXCL12 and its polymorphisms were analyzed by RT-PCR...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2011.1044
更新日期:2011-08-01 00:00:00
abstract::We previously reported in a retrospective study that CEA-based RT-PCR was useful for predicting the prognosis of patients with node-negative colorectal cancer. RT-PCR is well established for laboratory use, but many issues remain to be resolved prior to its clinical application. In addition to the false positive rate ...
journal_title:International journal of oncology
pub_type: 杂志文章,多中心研究
doi:
更新日期:2004-09-01 00:00:00
abstract::Hepatocellular carcinoma (HCC) is one of the most malignant types of cancer, and is associated with high recurrence rates and a poor response to chemotherapy. Immune signatures in the microenvironment of HCC have not been well explored systematically. The aim of the present study was to identify prognostic immune sign...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2020.4998
更新日期:2020-05-01 00:00:00
abstract::Tumour growth is frequently associated with massive loss of body weight and negative nitrogen balance leading to cachexia, one of the worst features of malignancy accounting for nearly two thirds of cancer deaths. At the metabolic level, cachexia is associated with depletion of body lipid stores as well as loss of ske...
journal_title:International journal of oncology
pub_type: 杂志文章,评审
doi:
更新日期:1999-03-01 00:00:00
abstract::Gene amplification is an important phenomenon in the pathogenetics of malignancy. A method is defined which allows the determination of gene amplification from any sample from which RNA can be obtained, and requires no a priori knowledge of the cytogenetic or genomic state of the tumor. This method allows the determin...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:1995-09-01 00:00:00
abstract::Fatigue is one of the most common complaints of people with cancer. It affects the majority of patients actively undergoing cancer related therapies, but also a meaningful number of those who successfully completed therapy and are disease-free and potentially cured at the end of the treatments. In cancer setting, fati...
journal_title:International journal of oncology
pub_type: 杂志文章,评审
doi:
更新日期:2002-11-01 00:00:00
abstract::Spindle cell tumors are clinically heterogeneous but morphologically similar neoplasms that can occur anywhere, mostly in adult patients. They are treated primarily with surgery to which is often added adjuvant or neoadjuvant radiation. Sub-classification of spindle cell sarcomas requires integration of histology, cli...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2014.2605
更新日期:2014-11-01 00:00:00
abstract::Pleomorphic adenomas (PAs) of salivary glands are characterized by the mixed appearance of epithelial and mesenchymal-like components such as myxoid and chondroid tissues. Although various studies have examined PAs, thus far it is not clear how PAs make these multiple components. Thus, clarification of the histodiffer...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2007-08-01 00:00:00