Abstract：
BACKGROUND:Human DNA topoisomerase I (topo 1) is an essential nuclear enzyme involved in vital cellular processes and the sole target of antitumor drugs of the camptothecin (CPT) family. The CPT derivative topotecan (Tpt, Hycamtin) is currently used in clinic, its effectiveness varying considerably for different types of cancer. The purpose of this study was to compare time- and dose-dependent cellular responses to Tpt in terms of alterations in the amount and stability of topo 1 in lung adenocarcinoma (A-549), ovarian adenocarcinoma (CaOv-3), colorectal adenocarcinoma (HT-29) and breast adenocarcinoma (MCF-7) cell lines. MATERIALS AND METHODS:Western blot analysis of the time-dependent redistribution of a full-size topo 1 and its proteolytical fragments was performed after Tpt treatment for 1 h at concentrations 10-fold or 100-fold higher than the Tpt IC50 for the respective cell lines. RESULTS:Tpt treatment of the CaOv-3 cell line produced a substantial time-dependent decrease in the amount of topo 1 immunoprotein. Conversely, the MCF7 cell line did not exhibit a topo 1-associated response to the Tpt treatment. Strong but different time- and dose-dependent topo 1 down-regulation effects were observed in the HT-29 and A-549 cell lines. CONCLUSION:The data obtained indicate that Tpt-induced time- and dose-dependent effects on the amount and stability of topo 1 are involved in the mechanisms of Tpt activity against different solid tumor cell lines.
journal_name
Anticancer Resjournal_title
Anticancer researchauthors
Devy J,Wargnier R,Pluot M,Nabiev I,Sukhanova Asubject
Has Abstractpub_date
2004-05-01 00:00:00pages
1745-51issue
3aeissn
0250-7005issn
1791-7530journal_volume
24pub_type
杂志文章abstract：:"Poly-plat", SSP, and SAP are second generation analogs of cisplatin (CDDP) with higher efficacy and potency. In order to understand the mechanism of action of these compounds, isolated murine peritoneal macrophages were treated with "poly-plat", SSP, or SAP (5 micrograms/ml) for 2 h. Treated macrophages demonstrated ...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1998-07-01 00:00:00
abstract：BACKGROUND:Plasmacytoid dendritic cells (PDCs) infiltrating solid tumor tissues and draining lymph nodes of head and neck squamous cell carcinoma (HNSCC) show an impaired immune response. Immunosuppressive cytokines secreted by HNSCC have been recognized to account for reduced interferon-alpha (IFN-alpha) production, w...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2009-08-01 00:00:00
abstract：:During the last 50 years median survival for metastatic breast cancer has not varied and remains 2-3.5 years. To assess the clinical benefit of salvage systemic therapy a retrospective analysis of metastatic breast cancer patients all homogeneously treated with a commonly used first-line anthacycline-containing cytoto...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1999-07-01 00:00:00
abstract：:Chloroethylnitrosourea (CENU) chemotherapy is used for the treatment of melanoma tumors. The main mechanism of action of this anticancer agent is via DNA damage. We recently showed in murine experiments using a parental double B16 melanoma tumor model that, after treatment of primary tumors with cystemustine (CENU age...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2008-01-01 00:00:00
abstract：:In this study, we set out to determine if the differential sensitivities to CPT between a radioresistant (Sk-Mel-3) and a radiosensitive (HT-144) human melanoma cell line, and also between cultures with a different growth phase in each cell line, were related to endogenous differences in cellular transport of CPT or t...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1998-07-01 00:00:00
abstract：:Experiments were designed to compare the efficacy of recombinant IL-2 immunotherapy and IL-2 gene therapy of i.p. growing murine plasmacytoma X63-Ag8.653. The kinetics of peritoneal exudate mononuclear cells were monitored during the progression and gene therapy of the plasmacytoma, using cytofluorometric analysis and...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1993-09-01 00:00:00
abstract：BACKGROUND:MYCN amplification is a powerful prognostic marker in neuroblastoma. Since MYCN status guides therapy results should be available promptly after diagnosis. MATERIAL AND METHODS:We used a differential PCR assay to analyze neuroblastoma samples obtained from 25 patients diagnosed and treated at our Institutio...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1998-03-01 00:00:00
abstract：BACKGROUND:Photodynamic therapy (PDT) and gene therapy protocols are separately under clinical evaluation for treatment of brain malignancies. Here, the potential of a novel combination technique, photo-induced delivery of macromolecules and genes to glioblastoma cells, is evaluated. MATERIALS AND METHODS:The photoche...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2005-01-01 00:00:00
abstract：BACKGROUND:Understanding molecular abnormalities could potentially lead to novel investigational approaches in the molecular epidemiology of lung cancer. These might include the identification of patients at high risk for primary NSCLC and the surveillance of patients with known NSCLC who are being treated using lung-s...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2001-09-01 00:00:00
abstract：:The use of salvage chemotherapy in advanced non small cell lung cancer (NSCLC) is controversial. However, many patients need to be treated in order to achieve relief of their symptoms. Docetaxel (taxotere) is one of the most active drugs for the treatment of advanced NSCLC and several studies have also shown its effec...
journal_title：Anticancer research
pub_type： 临床试验,杂志文章,多中心研究,评审
doi：
更新日期：2000-03-01 00:00:00
abstract：:Transcatheter embolization is considered to be less effective for early-stage hepatocellular carcinomas (HCCs) without a hypervascular arterial supply. In the present case report, a 65-year-old male with hepatitis type C and non-hypervascular HCC located in the hepatic hilum was successfully treated by bland transarte...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2014-04-01 00:00:00
abstract：BACKGROUND:Chemotherapy is considered to have a marginal impact on survival. The purpose of this study was to evaluate the rate of long-term survival in patients treated with chemotherapy for advanced non-small cell lung cancer (NSCLC). PATIENTS AND METHODS:The case records of 109 patients with NSCLC treated with chem...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2007-11-01 00:00:00
abstract：BACKGROUND:Studies have recommended a 21-gene recurrence score (RS) to optimize adjuvant treatment for patients with early-stage breast cancer (EBC) with hormone receptor-positive (HR+) and human epidermal growth factor receptor-2 negative (HER2-) tumors. This study aimed to prospectively evaluate the impact of this RS...
journal_title：Anticancer research
pub_type： 杂志文章
doi：10.21873/anticanres.11851
更新日期：2017-08-01 00:00:00
abstract：:We have developed a series of six CTL lines exhibiting preferential killing of autologous tumour cells from tumour-associated lymphocytes (TALs) infiltrating malignant ovarian ascites. Five out of six CTL lines showed increased percentages of V beta 8.1+ cells, four showed increased percentages of V beta 5.3+ cells an...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1991-09-01 00:00:00
abstract：:Flow cytometric DNA analysis was performed in 67 tubular, tubulovilous and villous rectal adenomas with different degree of dysplasia. One of the adenomas contained a focus of early invasive carcinoma. All but one of the 67 adenomas had near diploid DNA histograms; the exception was a tubular adenoma with severe dyspl...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1989-05-01 00:00:00
abstract：:Several reports have documented infiltration of many monocytes in renal cell carcinoma (RCC). Since few studies have examined the relationship between monocyte infiltration and clinical prognosis in RCC, we clinically investigated this relationship by semi-quantitative analysis of monocyte infiltration and tumor angio...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2002-11-01 00:00:00
abstract：:Nonterminal cellular differentiation has recently been shown to induce transformed cells to revert to a benign state and to become resistant to retransformation by chemical and physical carcinogens without limiting their proliferative potential. Nonterminal differentiation also induces native 3T3 T mesenchymal stem ce...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1990-09-01 00:00:00
abstract：BACKGROUND/AIM:We evaluated the clinical implications of pre- and post-treatment hematological parameters as prognostic factors in patients with locally advanced cervical cancer (LACC) who received definitive concurrent chemoradiotherapy (CCRT). PATIENTS AND METHODS:We retrospectively analyzed 125 patients with LACC (...
journal_title：Anticancer research
pub_type： 杂志文章
doi：10.21873/anticanres.13973
更新日期：2020-01-01 00:00:00
abstract：:Receptors for peanut agglutinin (PNA) were isolated from Lewis lung carcinoma cells (3LL) by detergent solubilization and affinity chromatography on PNA-agarose. The isolated receptors showed heterogeneous yet distinct molecular species when they were analyzed by SDS gel electrophoresis. In vivo inoculation of the iso...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1984-01-01 00:00:00
abstract：BACKGROUND/AIM:Curcumin is a promising nutraceutical for chemoprevention of head and neck squamous cell carcinoma (HNSCC). Capsular formulations of curcumin demonstrate low systemic bioavailability. We aimed to determine if curcumin levels were higher in healthy volunteers and cancer patients with microgranular curcumi...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2015-12-01 00:00:00
abstract：BACKGROUND:Docetaxel is a very active drug against breast cancer, but at the standard dose causes severe myelosuppression. In order to reduce the toxicity while maintaining the activity, weekly docetaxel administration was tested. PATIENTS AND METHODS:We enrolled 30 patients with metastatic breast cancer, who had been...
journal_title：Anticancer research
pub_type： 临床试验,杂志文章
doi：
更新日期：2003-03-01 00:00:00
abstract：:A prospective study was performed on a series of 42 patients with breast carcinoma. Immunocytochemical determination of receptors for estrogens (ER) and progesterone (PR) and flow cytometric DNA analysis (DNA-ploidy and the S-phase fraction) were performed on material obtained from fine-needle aspirates (FNA). The pat...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1993-11-01 00:00:00
abstract：BACKGROUND:Therapy for patients with hepatic metastases from colorectal cancer (CRC) remains controversial and may be improved by regional oxaliplatin which proved to be effective when administered systemically to patients with advanced CRC. METHODS:During the current study, which aims to determine the maximum tolerat...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2000-11-01 00:00:00
abstract：:Two human herpesviruses, HHV-6 and HHV-7, recently identified and closely related, were studied for their influence on cellular apoptosis and proliferation. Infection was monitored by viral DNA--and antigen expression. Apoptosis and cell proliferation were determined by immunocytological techniques and the markers p53...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1997-11-01 00:00:00
abstract：:Hereditary Non-polyposis Colorectal Cancer (HNPCC) has only recently been found to be linked to genetic loci. Clinical means of characterizing subjects at increased familial risk remain valid. If conservative criteria for HNPCC are not met, there remains a sufficiently high risk to first-degree relatives of colorectal...
journal_title：Anticancer research
pub_type： 杂志文章,评审
doi：
更新日期：1994-07-01 00:00:00
abstract：BACKGROUND:Our purpose was to determine the effects of amifostine, a cytoprotective agent, on doxorubicin tolerance and cardiotoxicity in rats. MATERIALS AND METHODS:Male Wistar rats were treated every other day with an intraperitoneal injection of amifostine or saline 30 minutes before intraperitoneal injection of do...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
abstract：:The 5-year survival of colorectal cancer patients with distant metastases is below 30%, despite the development and use of a variety of chemotherapeutic regimens. Therefore, new therapeutic strategies are warranted. Whereas radioimmunotherapy (RIT) has shown disappointing results in bulky disease, it may be a promisin...
journal_title：Anticancer research
pub_type： 临床试验,杂志文章
doi：
更新日期：1999-07-01 00:00:00
abstract：:The present study compared the effects of four lipophilic forms of selenium with regard to cancer chemopreventive activity, tissue selenium accumulation, and bioavailability for synthesis of a selenoprotein. These reagents included methylphenyl selenide, diphenyl selenide, triphenyl-selenonium chloride, and p-xylylbis...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1998-11-01 00:00:00
abstract：:Cathepsin B (CB) is involved in degradation of extracellular matrix proteins during tumor progression in human solid organ tumors (such as colorectal, bladder, and breast cancers), including human prostate cancer. Its activities are regulated by endogenous inhibitors (such as stefins or cystatins). Increased expressio...
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1999-07-01 00:00:00
abstract：:Explantation and cultivation in vitro of 55 human biopsies of histologically normal urothelial tissue, and 63 biopsies from transitional cell carcinomas (TCC) revealed a primary success rate of about 75% and a secondary success rate of about 50% with no significant differences, between normal and TCC derived cultures....
journal_title：Anticancer research
pub_type： 杂志文章
doi：
更新日期：1987-09-01 00:00:00
