Abstract:
:Glioblastoma multiforme (GBM) is characterized by extensive angiogenesis that is mostly orchestrated by the hypoxia inducible factor HIF-1. Deregulation of HIF-1 is believed to contribute to cancer initiation and progression. However, instances have been described in which loss of HIF-1 leads to more aggressive tumors. Here we investigated the consequences of downregulating HIF-1 function in the human GBM cell line TB10, both on cell proliferation in vitro and on tumor growth in vivo. RNA interference targeting the O2-regulated HIF-1alpha subunit efficiently reduced HIF-1alpha expression and transcriptional induction of HIF-1-responsive genes without affecting cell growth. Thus, singularly grown wild-type and HIF-1alpha-inhibited GBM cell populations did not significantly differ in proliferation rate. However, when the two populations were co-cultured, wild-type cells overgrew the HIF-1alpha-inhibited cells. Subcutaneous grafting in nude mice of wild-type and HIF-1alpha-inhibited GBM cells lead to comparable tumor formation and growth. Interestingly, cografting of wt and HIF-1alpha- inhibited GBM cells in nude mice resulted in more aggressive tumors, both in terms of tumor appearance and tumor growth. This suggests that cellular populations that differ in their ability to mount a response to hypoxia may compete in vitro but cooperate in vivo resulting in increased tumor aggressiveness.
journal_name
Int J Oncoljournal_title
International journal of oncologyauthors
Fiorenzo P,Mongiardi MP,Dimitri D,Cozzolino M,Ferri A,Montano N,Trevisi G,Maira G,Battistini L,Falchetti ML,Levi A,Pallini Rdoi
10.3892/ijo_00000554subject
Has Abstractpub_date
2010-04-01 00:00:00pages
785-91issue
4eissn
1019-6439issn
1791-2423journal_volume
36pub_type
杂志文章abstract::DNA replication is a vital process in cell division where anomalies can lead to tumorigenesis. Minichromosome maintenance complex component 10 (MCM10) plays a crucial role in this process. However, the role of MCM10 in lung cancer pathogenesis remains to be elucidated. In current study, using the publicly available lu...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2019.4899
更新日期:2019-12-01 00:00:00
abstract::After the publication of the article, the authors noted that they had made the following errors. In Fig. 5B, total PDK1 is incorrect in the published paper. The corrected version of Fig. 5B is shown below. Also in Fig. 6B, the DMSO-treated group and the brassinin (400 µM)-treated group are incorrect, and the corrected...
journal_title:International journal of oncology
pub_type: 已发布勘误
doi:10.3892/ijo.2015.3315
更新日期:2016-03-01 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::The presence of arachidonate 12-lipoxygenase (12-LOX) potentiates prostate cancer (PCa) progression and therefore may be a good therapeutic target and/or a potential diagnostic predictor for PCa. In this study, we examined the expression of 12-LOX in PCa stem cells (PCa SCs) to test if it can serve as a unique marker ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2011.901
更新日期:2011-04-01 00:00:00
abstract::Nucleophosmin (NPM, also known as B23), mainly localized in the nucleolus, has been reported to be overexpressed in many types of human cancer, including colon, ovarian, prostate and gastric cancer. NPM was identified while screening the differential nuclear matrix proteins during HMBA-induced differentiation of human...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2014.2407
更新日期:2014-07-01 00:00:00
abstract::Inositol hexaphosphate (IP6), also known as phytic acid, has been shown to exhibit anticancer effects in a number of preclinical tumor models. IP6 decreases proliferation by arresting cells in the G0/G1 phase, inhibits iron-mediated oxidative reactions, enhances differentiation and stimulates apoptosis. The present st...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2018.4488
更新日期:2018-10-01 00:00:00
abstract::We established new two protein-free culture subclones from murine well-characterized Ehrlich ascites carcinoma and P815 mastocytoma using intermittent protein-free culture performed previously for a protein-free subclone of fibrosarcoma (Gc-4 PF). The Ehrlich protein-free subclone (Ehrlich PF) grew much more slowly th...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.1.4.481
更新日期:1992-09-01 00:00:00
abstract::The failure of androgen deprivation therapy in prostate cancer treatment mainly results from drug resistance to androgen receptor antagonists. Although an aberrant caveolin‑1 (Cav‑1) expression has been reported in multiple tumor cell lines, it is unknown whether it is responsible for the progression of castration‑res...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2019.4774
更新日期:2019-06-01 00:00:00
abstract::Transforming growth factor-β receptor II (TGFBR2) is implicated in various types of cancer. Most molecules involved in the TGF-β pathway can be degraded by one or more microRNAs (miRNAs). In the present study, we show that miRNA plays an important role in downregulating TGFBR2 expression in Ewing's sarcoma (ES) cells....
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2017.4155
更新日期:2017-12-01 00:00:00
abstract::Reports of the metabolomic characteristics of esophageal cancer are limited. In the present study, we thus conducted metabolome analysis of paired tumor tissues (Ts) and non-tumor esophageal tissues (NTs) using capillary electrophoresis time-of-flight mass spectrometry (CE-TOFMS). The Ts and surrounding NTs were surgi...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2018.4340
更新日期:2018-06-01 00:00:00
abstract::Alphaviruses have several characteristics that make them attractive as gene therapy vectors such as transient and high-level expression of a heterologous gene. Alphavirus vectors, Semliki Forest virus (SFV), Sindbis virus (SIN) and Venezuelan equine encephalitis virus (VEE) have been developed as gene expression vecto...
journal_title:International journal of oncology
pub_type: 杂志文章,评审
doi:
更新日期:2004-04-01 00:00:00
abstract::Human telomerase reverse transcriptase (hTERT), the catalytic subunit of telomerase, is very closely associated with telomerase activity. Telomerase has been implicated in cellular immortalization and carcinogenesis. In situ detection of hTERT will aid in determining the localization of telomerase-positive cells. The ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2005-11-01 00:00:00
abstract::To overcome the poor tumor transduction efficiency of adenovirus serotype 5 (Ad5) observed in several types of cancer, the fiber region of Ad5, apart from its tail, was replaced by adenovirus serotype 35 (Ad35). The chimeric Ad5/F35 adenoviral vector did not exhibit any significant enhancement of transduction efficien...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2013.1812
更新日期:2013-04-01 00:00:00
abstract::Emerging evidence indicates that mesenchymal stem cells (MSCs) serve an indispensable role in the tumor microenvironment. However, whether MSCs participate in the development of oral carcinogenesis remains unclear. The present study isolated MSCs from clinical tissues and investigated the differences of MSCs derived f...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2019.4756
更新日期:2019-05-01 00:00:00
abstract::Malignant gliomas are diffuse infiltrative growing tumors with a poor prognosis despite treatment with a combination of surgery, radiotherapy and chemotherapy. It has been shown recently that complete tumor resection improves the survival time significantly. Hypericin, a component of St. Johns Wort, is one of the most...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2011.968
更新日期:2011-05-01 00:00:00
abstract::Although Bmi1 is well established as one of the most commonly activated oncogenes, the precise role of Bmi1 during hepatocarcinogenesis remains unclear. In addition, Bmi1 provides a potential therapeutic target for the future treatment of hepatocellular carcinoma (HCC). In this stud...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2012.1693
更新日期:2013-01-01 00:00:00
abstract::The ADAMs (A disintegrin and metalloproteinase) are a family of cell-surface membrane glycoproteins, whose multidomain structure enables diverse roles in a wide range of cellular processes. Accumulating evidence associates an increased expression of individual ADAM family members with various types of cancer, and we i...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract::Primary cilia are microtubule-based organelles that regulate smoothened-dependent activation of the GLI transcription factors in canonical hedgehog signaling. In many cancers, primary cilia are markedly decreased or absent. The lack of primary cilia may inhibit or alter canonical hedgehog signaling and, thereby, inter...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2015.3006
更新日期:2015-07-01 00:00:00
abstract::Among many risk factors of breast cancer, estrogens and non-estrogenic endocrine disruptors are considered to play critical roles in human breast carcinogenesis. Zeranol (Z) is a non-steroidal agent with potent estrogenic activity and has been widely used as an FDA approved beef growth promoter in the US. Recently, co...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2011.941
更新日期:2011-04-01 00:00:00
abstract::Hepatocellular carcinoma (HCC) is one the most common malignancies and has poor prognosis in patients. The aim of the present study is to explore the clinical significance of the main genes involved in the Janus kinase (JAK)‑signal transducer and activator of transcription (STAT) pathway in HCC. GSE14520, a training c...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2019.4862
更新日期:2019-10-01 00:00:00
abstract::Lamins are the major components of the nuclear lamina and play important roles in many cellular processes. The role of lamins in cancer development and progression is still unclear but it is known that reduced expression of lamin B1 has been observed in colon cancer. Thus, the aim of the present study was to elucidate...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2017.4182
更新日期:2018-01-01 00:00:00
abstract::The deregulation of the epidermal growth factor receptor (EGFR) pathway plays a major role in the pathogenesis of prostate cancer (PCa). However, therapies targeting EGFR have demonstrated limited effectiveness in PCa. A potential mechanism to overcome EGFR blockade in cancer cells is the autocrine activation of alter...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2012.1509
更新日期:2012-09-01 00:00:00
abstract::Breast cancer cells can switch from estrogen receptor α (ER)- to human epidermal growth factor receptor (HER)-driven cell growth upon acquiring antiestrogen resistance. HER ligands are cleaved by metalloproteinases leading to release of active HER ligands, activation of HER receptors and consequently increased cell gr...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2014.2434
更新日期:2014-07-01 00:00:00
abstract::Ganoderma lucidum (Reishi), an oriental medical mushroom, has been widely used in Asian countries for centuries to prevent or treat different diseases, including cancer. However, the mechanism(s) responsible for the effects of Ganoderma lucidum on cancer cells remain to be elucidated. We have previously demonstrated t...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:
更新日期:2004-05-01 00:00:00
abstract::The Stockholm Central Railway Station in Sweden was investigated for public radiofrequency (RF) radiation exposure. The exposimeter EME Spy 200 was used to collect the RF exposure data across the railway station. The exposimeter covers 20 different radiofrequency bands from 88 to 5,850 MHz. In total 1,669 data points ...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2016.3657
更新日期:2016-10-01 00:00:00
abstract::Tripartite motif 16 (TRIM16), a member of the RING B-box coiled-coil (RBCC)/tripartite totif (TRIM) protein family, has been demonstrated to have significant effects on tumor migration by previous studies, but its specific contribution to hepatocellular carcinoma (HCC) is currently unknown. The aim of this study was t...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2016.3398
更新日期:2016-04-01 00:00:00
abstract::A herbal preparation denoted PC SPES(R) is available in 'natural food' or 'health food' stores in the United States. This mixture (patent pending, US Serial number 08/697,920) consists of extracts from 8 different herbs, 7 originating from China and one from America, and is sold as a dietary supplement. Although sever...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.11.3.437
更新日期:1997-09-01 00:00:00
abstract::We investigated Fas expression and Fas-mediated apoptosis on 25 surgically resected renal cell carcinoma (RCC) tissues and 8 RCC cell lines. Immunohistochemistry demonstrated that cancer cells in the 25 tissues expressed Fas (100%). Fas expression was confirmed in all cell lines at protein and mRNA levels, but the 7 c...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.9.1.49
更新日期:1996-07-01 00:00:00
abstract::Metallothionein 3 (MT-3) has the ability to regulate the growth of nerve cells, but the significance of MT-3 expression outside the central nervous system and its participation in carcinogenesis have not yet been clarified. The aim of our study was to investigate the expression of MT-3 in ductal breast cancer and to d...
journal_title:International journal of oncology
pub_type: 杂志文章
doi:10.3892/ijo.2016.3759
更新日期:2016-12-01 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