Abstract：
:Point mutations and deletions in the p53 tumor suppressor gene occur frequently in advanced stage bladder tumors. To extend these observations to an in vitro model of bladder tumorigenicity, we have evaluated the presence of p53 mutations in a panel of bladder carcinoma cell lines. p53 alleles were cloned using the reverse transcriptase-polymerase chain reaction method, and exons 2-11 were sequenced. Of 11 cell lines examined, 5 cell lines had missense point mutations, and each overexpressed p53 protein on western blot analysis. Except for the HT-1197 cell line, these point mutations occurred in evolutionarily conserved domains, which are characteristic hot spots for mutations. HT-1197 encodes an unusual C-terminal point mutation in codon 365, within the basic motif tetramerization domain, suggesting a linkage between induction of a mutant p53 conformation and alterations in protein oligomerization. Six of 11 cell lines had wild-type levels of p53 expression, with 4 producing p53 proteins having either internal deletions or truncations, and 2 producing wild-type p53. Presence of wild-type p53 was found only in cell lines derived from either a low-grade, papillary tumor (RT4) or fetal bladder (FHs 738Bl). The T24 cell line was found to contain a novel p53 mutant having an in-frame deletion of tyrosine 126. This p53 mutant does not bind SV40 large T antigen, yet is expressed at low levels, comparable to cell lines containing wild-type p53 alleles. Our findings characterize p53 mutations in a panel of bladder carcinoma cell lines, and provide a model for testing the role of wild-type or mutant p53 cDNA to suppress or induce tumorigenic properties.
journal_name
Oncol Resjournal_title
Oncology researchauthors
Cooper MJ,Haluschak JJ,Johnson D,Schwartz S,Morrison LJ,Lippa M,Hatzivassiliou G,Tan Jsubject
Has Abstractpub_date
1994-01-01 00:00:00pages
569-79issue
12eissn
0965-0407issn
1555-3906journal_volume
6pub_type
杂志文章abstract：:Aclacinomycin (ACR) is an anthracycline anticancer drug that shows marked effects in Adriamycin (ADM)-resistant tumors. ADM, however, is not effective against ACR-resistant tumor cells. When tumor cells acquire resistance to ACR, though the resistance is not easily acquired, they show strong cross-resistance to ADM. T...
journal_title：Oncology research
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:Astragaloside IV (AS-IV) is an active ingredient in Astragalus membranaceus and is involved in various biological processes, such as regulating the immune system, and counteracting inflammation and malignancy. The aim of this study was to explore the effect of AS-IV on non-small cell lung cancer (NSCLC) cells. Cell co...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504018X15344989701565
更新日期：2019-03-29 00:00:00
abstract：:Epithelial ovarian cancer (EOC) has remained an enigmatic disease, the etiology of which is mostly unknown. Considering the age incidence around menopause, a "gonadotrophin theory" has been proposed, and considering the association with infertility, an "incessant ovulation" theory has been proposed. EOC originates fro...
journal_title：Oncology research
pub_type： 杂志文章,评审
doi：10.3727/096504008786111383
更新日期：2008-01-01 00:00:00
abstract：:Topotecan, a topoisomerase I poison and water-soluble derivative of camptothecin, has shown promise in treating solid tumors; however, the drug is unstable under physiological conditions and converts to an inactive form within 30 minutes. Encapsulating topotecan in liposomes (LIP-TPT) minimizes inactivation. The effic...
journal_title：Oncology research
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:Recently, there has been significant effort in developing techniques designed to detect disseminated tumor cells in the peripheral blood (PB). These techniques include immunocytochemical staining of cytocentrifuge slides, flow cytometry, and RT-PCR. Several authors reported various results concerning the sensitivity o...
journal_title：Oncology research
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
abstract：:MicroRNAs (miRNAs) are endogenous small noncoding RNAs that negatively regulate gene expression at the posttranscriptional level and play an important role in carcinogenesis. Herein, we characterized the global expression of miRNA in distal gastric adenocarcinomas and determined if circulating miRNAs could be used as ...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504012x13522227232156
更新日期：2012-01-01 00:00:00
abstract：:We previously reported that 9-methylstreptimidone, a piperidine compound isolated from a culture filtrate of Streptomyces, induces apoptosis selectively in adult T-cell leukemia cells. It was screened for a compound that inhibits LPS-induced NF-kappaB and NO production in mouse macrophages. However, 9-methystreptimido...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504012x13425470196056
更新日期：2012-01-01 00:00:00
abstract：:A series of bis-aziridinylnaphthoquinone derivatives has been prepared. The cytotoxic activities and DNA alkylation abilities of these synthetic bis-aziridinylnaphthoquinone derivatives were investigated. They displayed significant cytotoxicity against human carcinomna cell lines and weak cytotoxic activities against ...
journal_title：Oncology research
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
abstract：:We have investigated the role of protein kinase C (PKC) in the multidrug resistance (MDR) phenotype of human KB carcinoma cell lines. The PKC activator 12-O-tetradecanoylphorbol-13-acetate (TPA) reduced daunomycin accumulation in both drug-sensitive KB-3-1 and MDR KB-C1 cells in a time-dependent manner. The inactive p...
journal_title：Oncology research
pub_type： 杂志文章
doi：
更新日期：1996-01-01 00:00:00
abstract：:Increasing evidence shows that beyond its role in coagulation, thrombosis interferes with carcinogenesis. Endothelial cell protein C receptor (EPCR) is a cellular receptor for protein C and activated protein C (APC). Such EPCR-induced signal transduction promotes cancer cell migration, invasion, and angiogenesis and i...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504013x13589503482932
更新日期：2012-01-01 00:00:00
abstract：:Transforming growth factor-β1 (TGF-β1)-induced epithelial-mesenchymal transition (EMT) of non-small cell lung cancer (NSCLC) may contribute to tumor metastasis. TGF-β1-induced EMT in H1975 cells (a human NSCLC cell line) resulted in the adoption of mesenchymal responses that were predominantly mediated via the TGF-β1-...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504017X15051723858706
更新日期：2019-05-07 00:00:00
abstract：:Expression of sphingosine kinase 1 (SPHK1) plays a role in colorectal cancer progression. This study aimed to demonstrate the mechanism of human colorectal cancer cell metastatic phenotype through SPHK1 knockdown. Human colorectal cancer HT-29 cells were stimulated by phorbol 12-myristate 13-acetate (PMA) with or with...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504012x13342463747450
更新日期：2011-01-01 00:00:00
abstract：:Angiogenesis, the formation of new vessels, is essential for tumor growth and metastasis. Mutations of p53 tumor suppressor gene are frequent and play an important role in colorectal oncogenesis. A role of p53 as an angiogenesis inhibitor has also been proposed. We evaluated angiogenesis and p53 expression in 16 hyper...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504001108747693
更新日期：2000-01-01 00:00:00
abstract：:Progestin and adipoQ receptor family member III (PAQR3), a member of the PAQR family, is frequently downregulated in different types of human cancer. However, its expression and functions in esophageal cancer are still unknown. This study aimed to explore the expression of PAQR3 in esophageal cancer cell lines and to ...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504016X14761384026719
更新日期：2017-05-24 00:00:00
abstract：:Genistein is an inhibitor of the enzymes protein tyrosine kinase and topoisomerase-II. It induces G2-phase arrest in human Jurkat and murine P388 leukemia cells at concentrations at which it is also cytotoxic. The effects of genistein have been investigated on Jurkat and P388 leukemia sublines that manifest multidrug ...
journal_title：Oncology research
pub_type： 杂志文章
doi：
更新日期：1994-01-01 00:00:00
abstract：:Hepatocellular carcinoma (HCC) is the third leading cause of cancer-associated mortality worldwide. Although the mechanisms of HCC progression are not well understood, recent studies demonstrated the potential contribution of uric acid transporter SLC2A9 to tumor suppression. However, the roles and underlying mechanis...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504018X15199489058224
更新日期：2019-05-07 00:00:00
abstract：:Baicalein, a flavonoid derived from the root of Scutellaria baicalensis, has been reported to possess multiple pharmacological activities, such as anticancer and anti-inflammatory properties. This study investigated the effect of baicalein in cervical cancer cells. Cell growth curve and MTT assay were performed and re...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504017X15031557924141
更新日期：2018-05-07 00:00:00
abstract：:Although epidermal growth factor receptor tyrosine kinase inhibitors (EGFR TKIs) are used as first-line agents for treating nonsquamous cell lung cancer with EGFR mutation, there are many patients who have to receive these drugs following platinum-based chemotherapy. This study was designed to define whether exposure ...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504012x13285365944337
更新日期：2011-01-01 00:00:00
abstract：:It has been reported that upregulated SIRT1 (NAD(+)-dependent class III histone deacetylase) deacetylates the p53 protein, represses its function, and allows for tumor cell growth in various cancers. Here we investigated antitumor effects of tenovin-6, a small-molecule inhibitor of SIRT1 and SIRT2, in various colon ca...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504013X13854886566598
更新日期：2013-01-01 00:00:00
abstract：:Hepatocellular carcinoma (HCC) is a disease with poor prognosis rates and ineffective therapeutic options. Previous studies have reported the involvement of mitogen-inducible gene 6 (MIG-6) as a negative regulator in tumor formation. MicroRNAs (miRNAs) play crucial roles in the development of different types of cancer...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504017X15000784459799
更新日期：2018-05-07 00:00:00
abstract：:Carbonic anhydrase (CA) IX has emerged as a promising target for cancer therapy. It is highly upregulated in hypoxic regions and mediates pH regulation critical for tumor cell survival as well as extracellular acidification of the tumor microenvironment, which promotes tumor aggressiveness via various mechanisms, such...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504017X14965111926391
更新日期：2018-03-05 00:00:00
abstract：:The sequence of biochemical and molecular events that mediate growth arrest and cell death in tumor cells exposed to agents that induce DNA damage is poorly defined. This commentary exploits the recent explosion of information regarding oncogenes, tumor suppressor genes, and cell-cycle regulatory genes to develop a mo...
journal_title：Oncology research
pub_type： 杂志文章,评审
doi：
更新日期：1993-01-01 00:00:00
abstract：:The patterns of DNA fragmentation were evaluated following a brief exposure (2 h) of the human ileocecal adenocarcinoma cell line, HCT-8, to several specific thymidylate synthase inhibitors, a quinazoline (ZD1694) and benz[cd]indole-containing molecule (AG-331). The magnitude and size of DNA fragmentation induced by t...
journal_title：Oncology research
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:Inflammation plays a major role in the pathogenesis of cervical cancer. Chemokines are involved in inflammation, cancer, and infectious diseases. Therefore, we evaluated the association of the chemokine receptor gene polymorphism CCR5 Delta32 with risk of cervical cancer. A total of 150 histopathologically confirmed p...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504008784523667
更新日期：2008-01-01 00:00:00
abstract：:Metaplastic tubular complexes (MTC) have been proposed as precursor lesions for pancreatic adenocarcinoma (PDAC). In this study, we investigated the potential role of bone marrow-derived progenitor cells (BMPC) in the formation of MTC and PDAC in a rat model. F344 rats defective for CD26 (dipeptidyl peptidase IV, DPPI...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504009788428424
更新日期：2009-01-01 00:00:00
abstract：:This commentary proposes the working hypothesis that transforming growth factor-beta (TGF-beta) can play two different and opposite roles with respect to the process of malignant progression. During the earliest stages of carcinogenesis, TGF-beta can act as potent tumor suppressor and may mediate the actions of chemop...
journal_title：Oncology research
pub_type： 杂志文章,评审
doi：
更新日期：1997-01-01 00:00:00
abstract：:A number of previous investigations have reported that physical exercise renders immunopotentiating and antitumor therapeutic benefits to the tumor-bearing host. As these effects of physical exercise are mainly mediated through the modulation of hormonal and cytokine repertoire, it remains unclear if male and female t...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504010x12629634366142
更新日期：2010-01-01 00:00:00
abstract：:We have compared the effects of a number of inhibitors including aphidicolin, 2,4-dinitrophenol (DNP) and novobiocin on the in vitro cytotoxicity of several topoisomerase II (topo II)-directed agents, using cultured murine Lewis lung carcinoma cells. These agents comprised amsacrine, CI-921 (9-[(2-methoxy-4-methylsulf...
journal_title：Oncology research
pub_type： 杂志文章
doi：
更新日期：1993-01-01 00:00:00
abstract：:Medullary thyroid carcinoma (MTC) is an uncommon and highly aggressive tumor of the neuroendocrine system, which derives from the neuroendocrine C cells of the thyroid gland. Except for surgical resection, there are not very many effective systemic treatment options for MTC. N-Myc downstream-regulated gene 2 (NDRG2) h...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504015X14452563486093
更新日期：2016-01-21 00:00:00
abstract：:Glioma is a common type of malignant brain tumor characterized by aggressive metastasis capability. Recent evidence has suggested that noncoding RNAs, including microRNAs, have important functions in the pathophysiology of glioma development. In this study, we investigated the biological function of miR-422a in human ...
journal_title：Oncology research
pub_type： 杂志文章
doi：10.3727/096504016X14732772150389
更新日期：2017-01-26 00:00:00
