Abstract:
:Gastrointestinal stromal tumors (GISTs), are characterized by mutations of the KIT or platelet-derived growth factor receptor-α gene and the constitutive expression of Kit, which is currently being studied as a potential therapeutic target. In this study, we addressed the question of whether the microRNA (miRNA) 221/222 cluster (miR-221/222), which has been shown to be dysregulated in many malignancies, is linked to GIST diagnosis and prognosis, and whether it could provide a basis for possible therapeutic approaches. We analyzed the expression of miR-221 and miR-222 in 54 formalin-fixed and paraffin-embedded GISTs and corresponding peripheral non-tumorous tissue by real-time PCR. The miRNA-expression levels were studied in relation to histomorphological parameters, KIT mutation status and immunohistochemical Kit expression. miR-221 and miR-222, were reduced in most of the GISTs, in contrast to other tumors. No correlation was observed between miR-221/222 expression levels and histomorphological parameters, tumor risk grade, or KIT mutation status. However, we found major differences in miRNA expression among the different groups of immunohistochemical Kit expression, especially between Kit-negative and -positive tumors. The expression levels of miR-221 and miR-222 were significantly repressed in Kit-positive GISTs, compared to normal tissue, whereas Kit-negative GISTs exhibited a completely inverse expression pattern. This study shows for the first time that miR-221 and miR-222 can act as regulators of Kit expression in GISTs and hence reveals a new aspect in the molecular pathogenesis of these tumors. Although miR-221/222 expression does not have an impact on diagnostics, it could be considered as a tool for future therapeutic strategies for GISTs, especially for tumors with secondary resistance to tyrosine kinase inhibitors.
journal_name
Int J Oncoljournal_title
International journal of oncologyauthors
Koelz M,Lense J,Wrba F,Scheffler M,Dienes HP,Odenthal Mdoi
10.3892/ijo.2010.857subject
Has Abstractpub_date
2011-02-01 00:00:00pages
503-11issue
2eissn
1019-6439issn
1791-2423journal_volume
38pub_type
杂志文章abstract::p57KIP2, the second class of KIP family protein, is one of the negative regulators of the cell cycle. To elucidate the role of p57KIP2 in colorectal normal mucosa and cancer, we examined the expression of p57KIP2 protein in 110 pairs of colorectal non-tumor and cancer tissues. Immunohistochemical analysis showed that ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.19.1.39
更新日期:2001-07-01 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::Hsp90α is a molecular chaperone protein involved in the structural maturation of oncogenic signaling proteins. Hsp90 was recently identified as an anticancer target; various studies are ongoing to find ways for managing cancer through Hsp90α. However, this approach is limited by reported side-effects. Hypoxia is a hal...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2012.1450
更新日期:2012-07-01 00:00:00
abstract::The over-expression of urokinase receptor in breast cancer cells results in increased tumor invasion, growth and metastasis. As LY-6K belongs to the Ly6/uPAR superfamily, we assessed the association of LY-6K with metastasis in breast cancer cell lines and how the LY-6K gene mediates cancer cell metastasis. The migrati...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo_00000371
更新日期:2009-09-01 00:00:00
abstract::Effects of vorozole, a potent and specific non-steroidal aromatase inhibitor, were evaluated on female Sprague-Dawley (SD) rats with 7, 12-dimethylbenz[a]anthracene (DMBA)-induced mammary tumors. Vorozole at a dose of 0.25, 1.0 and 4.0 mg/kg was orally administered once a day for 28 consecutive days. A significant reg...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:1999-02-01 00:00:00
abstract::Thermal ablation of solid tumors using conductive interstitial thermal therapy (CITT) produces coagulative necrosis in the center of ablation. Local changes in homeostasis for surviving tumor and systemic changes in circulation and distant organs must be understood and monitored in order to prevent tumor re-growth and...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2013.2185
更新日期:2014-02-01 00:00:00
abstract::p73 has been shown to transcriptionally activate genes positively responsive to wild-type p53. In order to undertake a comparative study of functions of p53 and p73 we have cloned the cDNA of p73 from MCF-7 cells. Adenovirus onco-protein E1A inhibits the transactivation by p73; a deletion mutant of E1A incapable of in...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2001-02-01 00:00:00
abstract::Cancer stem cells (CSC) exhibit therapy resistance and drive self-renewal of the tumour, making cancer stem cells an important target for therapy. The PI3K signalling pathway has been the focus of considerable research effort, including in glioblastoma (GBM), a cancer that is notoriously resistant to conventional ther...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2016.3510
更新日期:2016-07-01 00:00:00
abstract::Cholangiocarcinoma is the most common biliary duct malignancy and the second most common primary liver cancer, accounting for 10‑20% of hepatic malignancies. With high mortality and poor prognosis, the 5‑year survival rate of cholangiocarcinoma is only 10%. A previous study demonstrated a significant association betwe...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2020.5165
更新日期:2020-12-30 00:00:00
abstract::Gliomas are malignant brain tumors thought to arise through multi-step tumorigenesis, involving both the activation of oncogenes and the loss of tumor suppressor genes. The cyclin D1 gene encodes a proto-oncogenic cell cycle regulator implicated in the pathogenesis of several types of cancer, including gliomas. Northe...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.9.3.493
更新日期:1996-09-01 00:00:00
abstract::Investigators have shown that green tea may decrease the risk of cancer. It is widely accepted that the main active component of green tea is EGCG (epigallocatechin-3-gallate). In our previous study, we examined the effect of green tea on breast cancer growth and endothelial cells both in in vitro assays and in animal...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2002-09-01 00:00:00
abstract::Lipomas are the most common soft tissue tumors in adults. They often carry chromosome aberrations involving 12q13~15 leading to rearrangements of the HMGA2 gene in 12q14.3, with breakpoints occurring within or outside of the gene. Here, we present eleven lipomas and one osteochondrolipoma with a novel recurrent chromo...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2015.3099
更新日期:2015-09-01 00:00:00
abstract::Epithelial-mesenchymal transition (EMT) is thought to be a key step for cancer metastasis. Using an immunohistochemical approach with gastric carcinoma tissue, we found the expression of protease-activated receptor-1 (PAR1), along with a metalloproteinase known to activate PAR1, were associated with poorer prognosis, ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2014.2651
更新日期:2014-12-01 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::SK-N-SH human neuroblastoma cell line was employed to test whether direct introduction of the RII beta subunit of PKA could induce growth inhibition and reverse-transformation of cancer cells. We infected SK-N-SH cells with an RII beta expression construct and the clonal line with the highest expression level was sele...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.8.4.663
更新日期:1996-04-01 00:00:00
abstract::Hepatocellular carcinoma (HCC) is the third most common cause of cancer-related mortality worldwide. We have previously reported that LASP-1 is a downstream protein of the urokinase type plasminogen activator (uPA). Here we investigated the role of LASP-1 in HCC by a molecular and biological characterization of LASP-1...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2015.2923
更新日期:2015-05-01 00:00:00
abstract::Abnormal activation of signal transducer and activator of transcription 3 (STAT3) serves a pivotal role in oral squamous cell carcinoma (OSCC) tumor cell invasion into normal tissues or distant organs. However the downstream regulatory network of STAT3 signaling remains unclear. The present study aimed to investigate ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2018.4293
更新日期:2018-04-01 00:00:00
abstract::Neuroblastoma (NB) is the most common extra-cranial solid tumor in children and despite aggressive therapy survival rates remain low. One of the contributing factors for low survival rates is aggressive tumor angiogenesis, which is known to increase due to radiation, one of the standard therapies for neuroblastoma. Th...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2016.3646
更新日期:2016-10-01 00:00:00
abstract::A group of 133 primary oral squamous cell carcinomas were studied concerning a relationship between exposure factors and tumour biological parameters with a focus on the TP53 gene and p53 protein status. Tumours were evaluated using immunohistochemistry (IHC) for expression of p53, PCNA, Ki-67 and bcl-2 proteins. The ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.22.4.861
更新日期:2003-04-01 00:00:00
abstract::Pyrogallol (PG) inhibits the growth of various cells via stimulating O2•--mediated death. This study investigated the effects of PG on cell death in human pulmonary fibroblast (HPF) cells in relation to reactive oxygen species (ROS) and glutathione (GSH) levels. PG inhibited the growth of HPF cells with an IC50 of ~50...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2016.3543
更新日期:2016-08-01 00:00:00
abstract::The Equiguard is a dietary supplement comprised of standardized extracts from nine herbs, respectively, Herba epimedium brevicornum Maxim (stem and leaves), Radix morindae officinalis (root), Fructus rosa laevigatae michx (fruit), Rubus chingii Hu (fruit), Schisandra chinensis (Turz.) Baill (fruit), Ligustrum lucidum ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2002-04-01 00:00:00
abstract::The aberrant expression of p53 and RB proteins was investigated by immunohistochemistry in 73 patients with esophageal SCC, who underwent esophageal resection. Fresh tumor tissues from 21 patients were also tested for p53 mutations in exons 4 through 9 by direct sequencing. Positive nuclear staining with p53 antibody ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.11.5.1109
更新日期:1997-11-01 00:00:00
abstract::Myofibroblasts in the stroma of pancreatic cancers promote tumor proliferation, invasion and metastasis by increasing extracellular matrix and secretion of several growth factors. In contrast, the role of myofibroblasts at peritoneally disseminated sites of pancreatic cancer has not yet been determined. This study was...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2014.2391
更新日期:2014-07-01 00:00:00
abstract::Renal cell carcinoma (RCC) is resistant to chemo-therapy partly due to the overexpression of the P-glycoprotein. Several tumor suppressor genes have been reported to be silenced by hypermethylation of the promoter region in RCC. We recently reported that the in vitro cytotoxicity of vinblastine (VBL) was enhanced by p...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2011.999
更新日期:2011-06-01 00:00:00
abstract::Sialic acid-containing glycosphingolipids, gangliosides, are expressed at high levels in the nerve tissues and various tumor cells. Although a number of studies on the roles of gangliosides in the regulation of cell proliferation have been performed, the mechanisms for the regulation are not well understood. We establ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract::Pancreatic neuroendocrine neoplasms (p-NENs) are slowly growing tumors with frequent liver metastasis. There is a variety of approaches to treat non-functional p-NENs with synchronous liver metastasis (LM) which complicates the determination of optimal treatment. Based on updated literature review, we discussed the tr...
journal_title:International journal of oncology
pub_type: 共识发展会议,杂志文章
doi:10.3892/ijo.2016.3711
更新日期:2016-11-01 00:00:00
abstract::We have analyzed proteins produced in Various human gastric carcinoma cell lines and normal gastric mucosa. The production of HSP90 increased in eight gastric carcinoma cell lines. Gelsolin content was down-regulated in seven gastric carcinoma cell lines. Furthermore, the production of GST-pi increased in a poorly dif...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.5.6.1347
更新日期:1994-12-01 00:00:00
abstract::Signet ring cell gastric cancer (SRCGC) has very poor prognosis worldwide, and studying its molecular characteristics is urgent for improving the outcome. However, few well-characterized SRCGC cell lines are available for research. Therefore, we established a novel cell line GCSR1, from a Chinese male SRCGC patient. C...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2015.2966
更新日期:2015-01-01 00:00:00
abstract::Changes in the promoter methylation of hTERT, the gene that encodes telomerase, a ribonucleoprotein responsible for replacing telomeric repeats, have been demonstrated in differentiating cells where hTERT is inhibited, suggesting epigenetic regulation of hTERT. All-trans retinoic acid (ATRA) induces differentiation in...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2008-03-01 00:00:00
abstract::We have examined antitumor effect of murine neuroblastoma cells (C1300) retrovirally transduced with interleukin-4 (IL-4) gene in syngeneic A/J and nude mice. Although in vitro proliferation of IL-4-secreting C1300 cells (C1300/IL-4) was not different from that of wild-type cells, the in vivo tumor growth of C1300/IL-...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.12.5.1067
更新日期:1998-05-01 00:00:00