Abstract:
:Mutations of p53 tumor suppressor gene increase with tumor progression in colorectal cancers. In this study, we examined the expressions of p33ING1, p14ARF, MDM2 and p21WAF1 mRNA in 25 advanced colorectal cancers by quantitative RT-PCR method, and compared the expression levels of p33ING1, p14ARF, p21WAF1 and MDM2 in relation to p53 status in the tumors. Fifteen of 25 colorectal cancers (60%) showed abnormal accumulation of p53 protein in the nucleus, and the remaining 10 colorectal cancers (40%) were negative for p53 immunostaining. We found a G --> T transition (nonsense mutation) at the first nucleotide of codon 298 (exon 8) in one p53-negative case, and a frame shift mutation on exon 7 in another p53-negative case. In remaining eight p53-negative cases, there was no mutation in the entire open reading frame of p53 cDNA. Interestingly, in eight cases with p53 wild-type gene, 6 cases (75%) showed a marked down-regulation of p14ARF mRNA, and three cases (37.5%) over-expressed MDM2 mRNA. Only one case with wild-type p53 gene showed normal level expression of p53 regulatory-factors (p33ING1, p14ARF, and MDM2). Thus, p53 tumor suppressor pathway was disrupted in 24 of 25 colorectal cancers (96%).
journal_name
Int J Oncoljournal_title
International journal of oncologyauthors
Tachibana M,Kawamata H,Fujimori T,Omotehara F,Horiuchi H,Ohkura Y,Igarashi S,Kotake K,Kubota Kkeywords:
subject
Has Abstractpub_date
2004-10-01 00:00:00pages
913-20issue
4eissn
1019-6439issn
1791-2423journal_volume
25pub_type
杂志文章abstract::The expression of mucinous ovarian cancer (OVC) antigen by hybrid cell lines derived by fusing a malignantly transformed Bloom syndrome (BS) cell line (BS-SHI-4M OVC-MU) and mouse L cells has been studied. Cell surfaces of 16 hybrids which grew 12-40 days post-fusion have been analysed by using a number of sera from m...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.7.6.1275
更新日期:1995-12-01 00:00:00
abstract::Renal cell carcinoma (RCC) is the most common solid neoplasm of adult kidney, and the major treatment for metastatic RCC (mRCC) is molecular targeted therapy. Sorafenib, as a multi-targeted tyrosine kinase inhibitor (TKI), has significantly improved clinical outcomes of mRCC patients. However, complete or long-term re...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2016.3356
更新日期:2016-04-01 00:00:00
abstract::Hedgehog (HH) pathway Smoothened (Smo) inhibitors are active against Gorlin syndrome-associated basal cell carcinoma (BCC) and medulloblastoma where Patched (Ptch) mutations occur. We interrogated 705 epithelial cancer cell lines for growth response to the Smo inhibitor cyclopamine ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2012.1599
更新日期:2012-11-01 00:00:00
abstract::Sonic hedgehog (SHH), Indian hedgehog (IHH) and Desert hedgehog (DHH) are Hedgehog family ligands, which play key roles in embryogenesis and carcinogenesis, especially in pancreatic cancer and gastric cancer. Drosophila Costal-2 (Cos2) is a Hedgehog signaling regulator, interacting with Smoothened (Smo), Cubitus inter...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2004-12-01 00:00:00
abstract::Prostate cancer is initially sensitive to hormone therapy; however, over time the majority of patients progress to a hormone-insensitive form classified as castration-resistant prostate cancer (CRPC). CRPC is highly metastatic and patients have a poor prognosis. Thus, new drugs for the treatment of this disease are re...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2017.4207
更新日期:2018-02-01 00:00:00
abstract::Endosialin emerged recently as a potential therapeutic target for sarcoma. Since some sarcoma subtypes, such as Ewing's sarcoma, show characteristics of neuroendocrine differentiation, we wondered whether cancers with neuro-endocrine properties and/or neuroectodermal origin, such as neuroblastoma, small cell lung canc...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2011.1091
更新日期:2011-10-01 00:00:00
abstract::The p16INK4A tumor suppressor gene is frequently inactivated in non-small cell lung carcinoma (NSCLC) and is less frequently inactivated in small cell lung carcinoma (SCLC) by mutation, deletion or DNA methylation. There are several reports that the reintroduction of the p16INK4A gene into p16(-) NSCLC cells results i...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.14.6.1075
更新日期:1999-06-01 00:00:00
abstract::We showed in our previous study that cancer upregulated gene (CUG) 2, a novel oncogene, confers resistance to infection of oncolytic vesicular stomatitis virus (VSV) by activating Stat1-mediated signal transduction. Since many studies have reported that autophagy is involved in virus replication, we investigated wheth...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2014.2264
更新日期:2014-04-01 00:00:00
abstract::There is increasing evidence that different types of breast cancers are related to distinct risk factors. We analyzed the risk of breast cancer with respect to circulating insulin-like growth factor (IGF)-I, IGF-binding protein (IGFBP)-3, 17beta-estradiol, estrone, testosterone, androstenedione and sex hormone-binding...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2006-07-01 00:00:00
abstract::Obesity is considered a risk factor for many cancers, including breast cancer. Our laboratory has previously shown that leptin is mitogenic in many cancer cell lines, including breast. Information regarding the effects of high leptin levels on leptin receptor expression and signaling is lacking. The purpose of this st...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2006-04-01 00:00:00
abstract::Inhibin and activin, members of transforming growth factor beta (TGF beta) superfamily, have been localized immunohistochemically in fetal bovine heart endothelial cells (FBHE), suggesting that these cells produce inhibin/activin proteins. In addition, the mRNAs coding for alpha-, and beta A-subunits of inhibin/activi...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.7.4.759
更新日期:1995-10-01 00:00:00
abstract::The intention of a surveillance program to monitor prostate cancer patients is to detect recurrence of disease as soon as possible and institute therapy at the time of recurrence in order to improve the chance of cure or extend survival. We analyzed the cost of four surveillance programs for prostate cancer. As PSA le...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2.3.473
更新日期:1993-03-01 00:00:00
abstract::Overexpression of TMPRSS4, a cell surface-associated transmembrane serine protease, has been reported in pancreatic, colorectal and thyroid cancers, and has been implicated in tumor cell migration and metastasis. Few reports have investigated both TMPRSS4 gene expression levels and ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2012.1513
更新日期:2012-09-01 00:00:00
abstract::TGF-beta1 stimulates proliferation of WI38 human embryo fibroblasts but inhibits that of their SV40-transformed counterparts, VA13 cells. Protein expression levels of cyclins A, D1, E and that of cdk2 and cdk4 were not affected by TGF-beta1 in either of these cells. However, TGF-beta1-treatment increases cdk2 kinase a...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.14.5.905
更新日期:1999-05-01 00:00:00
abstract::Patients with esophageal carcinoma (ESCA) have a poor prognosis and high mortality rate. Although standard therapies have had effect, there is an urgent requirement to develop novel options, as increasing drug tolerance has been identified in clinical practice. In the present study, differentially expressed genes (DEG...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2018.4618
更新日期:2019-01-01 00:00:00
abstract::Aurora kinase A (AURKA) regulates the cell cycle checkpoint and maintains genomic integrity. AURKA is overexpressed in various malignant tumors and its upregulation induces chromosomal instability, which leads to aneuploidy and cell transformation. To investigate the role of AURKA in endometrial cancer, we evaluated t...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2015.2842
更新日期:2015-04-01 00:00:00
abstract::Gamma linolenic acid (GLA) is an anti-cancer agent recently reported to inhibit tumour cell-matrix attachment. This study examined the effects of GLA on the adhesion of two tumour cell lines, HT115 (human colon) and MDA MB 231 (human breast), to an extracellular matrix, Matrigel. The action of GLA on focal adhesion ki...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.8.3.583
更新日期:1996-03-01 00:00:00
abstract::Pancreatic cancer is characterized by a dense desmoplastic reaction in which extracellular matrix proteins accumulate and surround tumor cells. Integrins and their related signaling molecules are associated with progression of pancreatic cancer. In the present study, the association between the metastasis of pancreati...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2017.4018
更新日期:2017-07-01 00:00:00
abstract::We have demonstrated anti-proliferation and anti-metastasis effects of both interferon-alpha and a histone deacetylase inhibitor, sodium butyrate, on human liver cancer cell lines. In this study, invasive ability of human liver cancer cell lines through the matrix-coated membrane was examined and inhibitory effect of ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2004-04-01 00:00:00
abstract::The extracellular cGMP levels or the ratio between extracellular levels of cGMP and cAMP (cGMP(ex)/cAMP(ex)) have been proposed as tumor marker for premalignant and malignant diseases of the uterine cervix. More than 50% of cervical cancers occur in premenopausal women and detailed information about hormonal and drug ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.6.6.1279
更新日期:1995-06-01 00:00:00
abstract::We have previously isolated a drug-resistant, [PC3(R)], variant of human prostate PC3 cell line, which showed significant resistance (>10-fold) to adriamycin. No known mechanisms of drug resistance were found; however, resistant cells expressed more bcl2, c-myc, and ms oncogenes compared to the sensitive cells. In thi...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.11.4.819
更新日期:1997-10-01 00:00:00
abstract::Sirtuins are critical players within multiple cellular pathways such as stress response, apoptosis and energy metabolism. They are associated with metabolic and degenerative diseases, the pathogenesis of cancer and are key elements in the regulation of cellular life span. From within the 7 known human sirtuins, SIRT3 ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo_00000574
更新日期:2010-04-01 00:00:00
abstract::The transcription factor E2F4 plays a critical role in cell cycle progression of normal and cancerous intestinal epithelial cells. Contrary to other E2Fs, the coding region of the E2F4 gene contains a longer spacer segment of a CAG trinucleotide repeat sequence encoding 13 consecutive serine residues, which is highly ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2013.2131
更新日期:2013-12-01 00:00:00
abstract::Regulation of cytoplasmic p21CIP/WAF1 (p21) is of great clinical significance in molecular oncology due to its identification as an antiapoptotic factor, a poor survival predictor as well as a drug-resistance inducer. A retrospective study of the immunohistochemical (IHC) profiles of 128 human primary breast cancers s...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2006-11-01 00:00:00
abstract::Magnolol, a neolignan from the traditional medicinal plant Magnolia obovata, has been shown to possess neuroprotective, anti-inflammatory, anticancer and anti-angiogenic activities. However, the precise mechanism of the anti-angiogenic activity of magnolol remains to be elucidated. In the present study, the anti-angio...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2013.1959
更新日期:2013-08-01 00:00:00
abstract::Conjugated linoleic acid (CLA) refers to a group of naturally occurring positional and geometrical conjugated dienoic isomers of linoleic acid (C18:2), of which the cis-9,trans-11 (c9,t11) and trans-10,cis-12 (t10,c12) isomers predominate. Accumulating evidence has demonstrated that CLA isomers are capable of inhibiti...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2005-12-01 00:00:00
abstract::The tumor suppressor gene product p53 has been detected in a high percentage of esophageal squamous cell carcinoma. To evaluate the role of this protein in carcinogenesis, we examined the p53 overexpression both in esophageal dysplasia and in esophageal squamous cell carcinoma in the same patients. Using anti-p53 anti...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.4.5.1061
更新日期:1994-05-01 00:00:00
abstract::The MUC1 heterodimeric protein is aberrantly overexpressed in diverse human carcinomas and contributes to the malignant phenotype. The MUC1-C transmembrane subunit contains a CQC motif in the cytoplasmic domain that has been implicated in the formation of dimers and in its oncogenic function. The present study demonst...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2011.1308
更新日期:2012-05-01 00:00:00
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journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2006-02-01 00:00:00
abstract::Meningiomas are benign brain tumors thought to arise by multi-step tumorigenesis, involving both the activation of oncogenes and the loss of tumor suppressor genes. The cell cycle regulator proto-oncogene cyclin D1 has been implicated in the pathogenesis of several types of cancer. Northern blot analysis revealed expr...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.9.6.1213
更新日期:1996-12-01 00:00:00