Abstract:
:Whether the phenotypes of drug resistance and metastatic activity in cancer are dependent on each other or not is controversial. We compared in vitro invasive properties of human hepatoma cells resistant to epirubicin and rich in P-glycoprotein (Pgp) (HB8065/R) with the parental epirubicin-sensitive, Pgp-poor cells (HB8065/S). The HB8065/R cells displayed elevated capacity to migrate in a transwell chamber assay (three- to fourfold compared to the HB8065/S cells), both in the absence and presence of a reconstituted basement membrane extract (Matrigel). In the presence of the P-gp inhibitor PSC 833 (1.5 micrograms/ml) the capacity of the HB8065/R cells to cross Matrigel-coated filters was attenuated by approximately 25%. Compared to the HB8065/S cells, the resistant cell line expressed higher level of plasminogen activator inhibitor (PAI)-1 mRNA (approximately threefold), which was reflected by a approximately fivefold increase in secreted PAI-1 immunoactivity (approximately 50 ng/10(6) HB8065/R cells). Furthermore, treatment with PSC 833 was associated with upregulation of PAI-1 mRNA (approximately 3.5-fold) and immunoactivity (approximately twofold) in the HB8065/R cells. Level of tissue inhibitor of metalloproteinases (TIMP)-1 was also significantly increased in the HB8065/R cells compared to the HB8065/S cells, whereas both cell lines showed low constitutive expression of TIMP-2. Levels of TIMPs were not altered by PSC 833. These data suggest that overexpression of Pgp in these hepatoma cells may covariate with the phenotypes of both enhanced in vitro invasiveness and high PAI-1 expression, whether randomly acquired or not.
journal_name
Oncol Resjournal_title
Oncology researchauthors
Bjørnland K,Lehne G,Johansen HT,Fodstad O,Rugstad HE,Aasen AO,Ree AHsubject
Has Abstractpub_date
1998-01-01 00:00:00pages
255-62issue
5eissn
0965-0407issn
1555-3906journal_volume
10pub_type
杂志文章abstract::We previously reported that vasoactive intestinal polypeptide (VIP) significantly inhibited Matrigel invasion and haptotactic migration of murine colon 26-L5 carcinoma in vitro. To extend our study, we investigated the inhibitory mechanisms of VIP on Matrigel invasion of colon 26-L5 carcinoma, and the effect on metast...
journal_title:Oncology research
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::The pre-mRNA splicing regulator serine-arginine protein kinase 1 (SRPK1), a member of the SR kinase family, plays an essential role in cancer development and various pathophysiological processes. However, its expression pattern and functions in renal cell carcinoma (RCC) remain unknown. Therefore, the aim of this stud...
journal_title:Oncology research
pub_type: 杂志文章
doi:10.3727/096504016X14743324568129
更新日期:2017-03-13 00:00:00
abstract::Mutational inactivation of the cyclin-dependent kinase inhibitors (CDKIs) (p16INK4A/MTS1) tumor suppressor gene has been found in a variety of human tumor types. To investigate the involvement of CDKI abnormality in mesenchymal chondrosarcoma, alterations of CDKIs were examined in human mesenchymal chondrosarcoma tiss...
journal_title:Oncology research
pub_type: 杂志文章
doi:10.3727/000000001108747381
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abstract::Pancreatic cancer is characterized as a type of gastrointestinal tumor with a poor prognosis and high degree of malignancy. CIITA gene was found highly methylated in pancreatic carcinoma cell line PANC-1 and responsible for the low expression of major histocompatability complex II (MHC-II) that may lead to immune evas...
journal_title:Oncology research
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abstract::3'-Azido-3'-deoxythymidine (AZT) competitively inhibited the transport of thymidine (Km = 0.23 mM) into human erythrocytes with a Ki of 1.0 mM at 37 degrees C. The principal human metabolite of AZT in plasma, the 5'-glucuronide (GAZT), was a weak inhibitor of the nucleoside transporter (< 20% inhibition of the influx ...
journal_title:Oncology research
pub_type: 杂志文章
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更新日期:1993-01-01 00:00:00
abstract::Ubiquitin-specific protease 22 (USP22), a novel deubiquitinating enzyme, belongs to an extended family of proteins that have ubiquitin hydrolase activity. Recently, USP22 has attracted widespread attention because of its implication in carcinogenesis. However, there have been no studies, to our knowledge, investigatin...
journal_title:Oncology research
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doi:10.3727/096504016X14772395226335
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abstract::The melanin biosynthetic pathway from tyrosine is a potential target for combating malignant melanoma. N-Acetyl-4-S-cysteaminylphenol 1 is a previously synthesized analogue of tyrosine that probably acts by this pathway. It interferes with cell growth and proliferation via selective oxidation in melanocytes to an oqui...
journal_title:Oncology research
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更新日期:2006-01-01 00:00:00
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journal_title:Oncology research
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更新日期:2012-01-01 00:00:00
abstract::We investigated the regulatory effect of interleukin (IL) 10 on IL-12-inducible killer activity of blood mononuclear cells (MNC) of healthy subjects. IL-10 suppressed non-MHC-restricted killer activity induced by IL-12 in a dose-dependent manner. Cytotoxicity against Daudi cells of blood MNC activated with optimal dos...
journal_title:Oncology research
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::Mutations in the APC gene contribute to development of sporadic desmoid tumors as well as to the hereditary tumors that usually accompany familial adenomatous polyposis (FAP). Adenomatous polyposis coli (APC) mutations cause an intracellular accumulation of beta-catenin that results in abnormal signaling in the wnt/wi...
journal_title:Oncology research
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::Numerous data indicate that cellular oxidoreductases may be responsible for the cardiotoxic effects of antitumor anthracycline drugs as a consequence of the mediation by these agents of one-electron transfer from reduced nucleotides to atmospheric oxygen. This process is catalyzed primarily by NADH dehydrogenase, NADP...
journal_title:Oncology research
pub_type: 杂志文章
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更新日期:2004-01-01 00:00:00
abstract::Empty spiracles homeobox 2 (EMX2) is a homeodomain-containing transcription factor that plays an essential role in tumorigenesis. However, to the best of our knowledge, the role of EMX2 in human colorectal cancer (CRC) is still unclear. Thus, the aim of this study was to investigate the expression and role of EMX2 in ...
journal_title:Oncology research
pub_type: 杂志文章
doi:10.3727/096504016X14756640150695
更新日期:2017-04-14 00:00:00
abstract::Our recent studies demonstrated that 12-O-tetradecanoylphorbol-13-acetate (TPA) has pharmacological activity for the treatment of acute myelocytic leukemia patients. In the present study, we investigated the potential synergistic effect of all-trans retinoic acid (RA), 1alpha,25-dihydroxyvitamin D3 (VD3), and sodium b...
journal_title:Oncology research
pub_type: 杂志文章
doi:
更新日期:2000-01-01 00:00:00
abstract::PPAR-gamma is known to have a growth-suppressive effect in different cancers. In this study, we investigated the role of PPAR-gamma in the development of Barrett's esophagus (BE) and esophageal adenocarcinoma (EA). We used immunohistochemistry and real-time PCR to analyze differences in PPAR-gamma protein and mRNA exp...
journal_title:Oncology research
pub_type: 杂志文章
doi:10.3727/096504011x12935427587849
更新日期:2011-01-01 00:00:00
abstract::Treatment of female SKH-1 hairless mice with ultraviolet B light twice a week for 20 weeks resulted in a population of tumor-free mice with a high risk of developing skin tumors during the next several months in the absence of additional UVB treatment (high-risk mice). Topical applications of nondenatured soymilk but ...
journal_title:Oncology research
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doi:10.3727/0965040041292350
更新日期:2004-01-01 00:00:00
abstract::The expression of survivin molecules has been confirmed in many types of cancer cells, including colon cancer cells, and they are considered important antiapoptotic molecules. Recent studies have revealed the existence of different splicing forms of survivin molecules; however, no studies have examined their expressio...
journal_title:Oncology research
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doi:10.3727/096504010x12767359113848
更新日期:2010-01-01 00:00:00
abstract::To elucidate the proteins related to the development and progress of esophageal squamous cell carcinoma (ESCC), we performed gene expression profile analysis of 14 ESCC tissues. We identified 182 genes that were commonly upregulated (p < 10(-5)) and 54 genes that were downregulated in ESCC tissues (p < 10(-6)). In ord...
journal_title:Oncology research
pub_type: 杂志文章
doi:10.3727/096504009790217407
更新日期:2009-01-01 00:00:00
abstract::Tripartite motif-containing protein 37 (TRIM37), a new member of the RING-B-box-coiled-coil (RBCC) subfamily of zinc finger proteins, was found to be involved in the development and progression of several cancers. However, the expression pattern and biological functions of TRIM37 in colorectal cancer (CRC) remain unkn...
journal_title:Oncology research
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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::Laryngeal cancer, one of the most common head and neck malignancies, is an aggressive neoplasm. Increasing evidence has demonstrated that microRNAs (miRNAs) exert important roles in oncogenesis and progression of diverse types of human cancers. miR-632, a tumor-related miRNA, has been reported to be dysregulated and i...
journal_title:Oncology research
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journal_title:Oncology research
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abstract::Although arsenic trioxide (ATO) is a well-known antileukemic drug used for acute promyelocytic leukemia treatment, the development of ATO resistance is still a big challenge. We previously reported that microRNA-204 (miR-204) was involved in the regulation of acute myeloid leukemia (AML) cell apoptosis, but its role i...
journal_title:Oncology research
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doi:10.3727/096504019X15528367532612
更新日期:2019-09-23 00:00:00
abstract::Pyroptosis is a type of proinflammatory programmed cell death mediated by caspase 1 activity and occurs in several types of eukaryotic tumor cells, including gliomas. MicroRNAs (miRNAs), small endogenous noncoding RNAs, have been demonstrated to be advantageous in glioma therapy. However, the question of whether miRNA...
journal_title:Oncology research
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abstract::This study aimed to explore the effects of lncRNA BCAR4 on the viability and aggressiveness of non-small cell lung cancer (NSCLC) cells. qRT-PCR was used to determine the expression of BCAR4 and GLI2 downstream genes in NSCLC tissues and cell lines. Chromatin isolation by RNA purification (CHIRP) and Western blot were...
journal_title:Oncology research
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doi:10.3727/096504018X15220594629967
更新日期:2019-02-21 00:00:00
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abstract::The purpose of this study was to investigate the efficacy and safety of drug-eluting beads transarterial chemoembolization (DEB-TACE) treatment in Chinese hepatocellular carcinoma (HCC) patients and the prognostic factors for treatment response as well as survival. A total of 275 HCC patients were included in this pro...
journal_title:Oncology research
pub_type: 临床试验,杂志文章,多中心研究
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journal_title:Oncology research
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abstract::Ovarian cancer is the most lethal disease among gynecological malignancies. More effective therapy is required to counter high recurrence rates and chemotherapy resistance. We investigated the efficacy and molecular mechanisms of three combined treatments (TCTs)-a novel histone deacetylase (HDAC) inhibitor OBP-801/YM7...
journal_title:Oncology research
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abstract::Claudin18 (CLDN18) is necessary for intercellular junctions and is reported to be involved in cell migration and metastasis, making it like an oncogene in various cancer types. However, the biological function and regulatory mechanisms of CLDN18 in lung adenocarcinoma are not yet clear. In this study, we found downreg...
journal_title:Oncology research
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更新日期:2018-05-07 00:00:00