Abstract:
:It was the aim of this study to compare drug-resistant sublines of the murine P388 in relation to resistance markers, the resistant phenotype and immunogenicity. Resistance to drugs either belonging to the MDR type (Doxorubicin, Vincristine, Mitoxantrone) or to the non-MDR type (Methotrexate) was generated in vivo in order to mimic the clinical situation. All resistant sublines expressed the mdr1 gene and the p-glycoprotein determined on m-RNA level or immunohistochemically, while no expression was registered in the parent P388. The rhodamine 123 fluorescence as marker for the energy dependent drug efflux pump was decreased only in the MDR-sublines, while the parent P388 and the Methotrexate-resistant line retained 100% or 90% of the dye, respectively. This indicates that the rhodamine efflux is a more function-related marker for MDR than the mdr1 gene and the pgp. The in vivo characterization of the sublines as regards their sensitivity to cytostatics revealed a clear-cut cross-resistance to MDR drugs in the MDR-lines, while the Methotrexate resistant subline was only cross-resistant to Cytarabine. In each resistant subline collateral sensitivity to certain but different cytostatics was observed. Experiments to overcome resistance by concomitant treatment with the modulators Nifedipine, Verapamil, Cyclosporin A and Chloroquin led to only limited success. The sublines P388/Mitox, P388/Vinc and P388/MTX developed immunogenicity which was never registered in the original P388. Vaccination with lethally irradiated drug-resistant cells resulted in a substantial rejection of viable tumor cells of the same line. With the P388/Mitox and P388/Vinc also an over-cross immunization was possible. This generation of immunogenicity as a concomitant characteristic of resistance should be considered as therapeutic potential also in the treatment of clinical cancer.
journal_name
Anticancer Resjournal_title
Anticancer researchauthors
Fichtner I,Stein U,Hoffmann J,Winterfeld G,Pfeil D,Hentschel Msubject
Has Abstractpub_date
1994-09-01 00:00:00pages
1995-2003issue
5Aeissn
0250-7005issn
1791-7530journal_volume
14pub_type
杂志文章abstract:BACKGROUND:The determination of dihydropyrimidine dehydrogenase (DPD) deficiency is important in avoiding severe 5-fluorouracil (FU) toxicity. The dihydrouracil (UH2)-uracil (Ura) ratio (UH2/Ura) in plasma might be an important indicator of the risk of 5-FU catabolic deficiency. In order to clarify this possibility, th...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2006-09-01 00:00:00
abstract:BACKGROUND:The E-cadherin/beta-catenin complex plays a crucial role in epithelial cell-cell adhesion and in the maintenance of tissue architecture. We previously reported aberrant expression of beta-catenin in endometrial carcinomas. However, the expression and correlation of E-cadherin and beta-catenin in normal and m...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2004-11-01 00:00:00
abstract:BACKGROUND/AIM:Biosimilar agents are biologic products that have no clinically meaningful differences in terms of quality, efficacy, safety and immunogenicity compared to an already approved reference biological product, with the potential to reduce the costs of biologics. Considering the increasing numbers of oncology...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13552
更新日期:2019-07-01 00:00:00
abstract:BACKGROUND/AIM:N6-Methyladenosine (m6A), the most abundant internal modification of RNA, plays a critical role in cancer development. However, the clinical implications of m6A in hepatocellular carcinoma (HCC) remain unclear. MATERIALS AND METHODS:We analyzed 177 HCC and paired noncancerous liver tissues from patients...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.14690
更新日期:2020-12-01 00:00:00
abstract:BACKGROUND:Histone acetyltransferase E1A-binding protein p300 (EP300), tumor protein p53 (TP53) and B-cell lymphoma-2-associated X protein (BAX) contribute to the regulation of the cell cycle and apoptosis, cellular processes that are often impaired in cancer cells. The aim of this study was to determine the expression...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.11646
更新日期:2017-06-01 00:00:00
abstract:BACKGROUND:Mifepristone has been demonstrated to improve longevity and quality of life in mice with spontaneous murine cancer without progesterone receptors and in human colon cancer. The present study evaluated the palliative effect of mifepristone in a variety of different types of human cancer. PATIENTS AND METHODS...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2010-02-01 00:00:00
abstract:BACKGROUND:The pS2 protein is involved in the maintenance of the integrity of the gastrointestinal tract. In breast cancer pS2 can be demonstrated in at least half of the tumors and probably reflects the functional status of ER. Several features make it likely that pS2 is involved in growth regulation. PATIENTS AND ME...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract:AIM:The aim of the study was to identify novel biomarkers that are vital for improving management of patients with gastric cancer (GC). MATERIALS AND METHODS:An RNA-sequencing analysis was conducted using gastric tissue from patients with metastatic GC. In vitro cell functions were evaluated by siRNA-mediated knockdow...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13820
更新日期:2019-11-01 00:00:00
abstract::A brief review summarizing the relationships that exist between the DEK protein and gene regulation, oncogenesis and AIDS. ...
journal_title:Anticancer research
pub_type: 杂志文章,评审
doi:
更新日期:2003-05-01 00:00:00
abstract:BACKGROUND/AIM:Pancreatic neuroendocrine tumors (pNETs) are rare pancreatic neoplasms, and therapeutic options for pNETs are limited. Metformin is an anti-hypoglycemic drug that appears to have anticancer effects. However, little is known about the effect of metformin on pNETs. In this study, we investigated the anti-p...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13933
更新日期:2020-01-01 00:00:00
abstract::The aim of the study was to investigate tumor suppressor genes (TSGs) which play a role in the pathogenesis of prostate cancer. Additionally, different prostate tumors were immunohistochemically related to their potential precursor cells, the basal cells and the glandular secretory epithelium, which differ in their ho...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1997-07-01 00:00:00
abstract::Tissue-specific cancers originate in organ- or tissue-specific cells with the potential to proliferate. Recent reports have shown that every adult tissue may have its own stem cells. Cancer cells and organ- and tissue-specific stem cells and other progenitor cells are strikingly similar: both types self-renew, prolife...
journal_title:Anticancer research
pub_type: 杂志文章,评审
doi:
更新日期:2002-05-01 00:00:00
abstract:BACKGROUND/AIM:The aim of this study was to determine the natural history of benign thyroid nodules using ultrasonography. PATIENTS AND METHODS:The records of 223 patients with benign thyroid nodules treated at the Kochi Medical School from 2010 to 2012 were reviewed retrospectively. Repeated ultrasonography was perfo...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13317
更新日期:2019-04-01 00:00:00
abstract:BACKGROUND:Pleomorphic rhabdomyosarcomas of the uterus, mainly occurring in postmenopausal women with leading symptoms of vaginal bleeding and abdominal pain, are very rare malignant tumors of the female genital tract. Due to the inefficiency of the adjuvant therapy, the outcome remains poor in the majority of the repo...
journal_title:Anticancer research
pub_type: 杂志文章,评审
doi:10.21873/anticanres.11592
更新日期:2017-05-01 00:00:00
abstract::Glioblastomas are the most frequent and most malignant astrocytic gliomas. The epidermal growth factor receptor (EGFR) gene is the most frequently amplified and overexpressed in glioblastomas. The expression of bcl-2 and Bax in EGFR-antisense transfected and un-transfected glioblastoma cell line, U87E and U87V was stu...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1999-09-01 00:00:00
abstract:BACKGROUND:Our aim was to analyze the impact of intraperitoneal chemotherapy (IPC), administered with direct peritoneal puncture, on the survival of patients with pretreated ovarian cancer in a real-life setting. PATIENTS AND METHODS:This was a retrospective study comparing patients with advanced ovarian cancer treate...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.11256
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:Tyrosine kinase inhibitors (TKIs) directed against epidermal growth factor receptor (EGFR) are important in the treatment of non-small cell lung cancer (NSCLC), especially those harboring EGFR mutations. But little is known regarding the clinical value of serum tumor marker levels measured prior to treatment...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.12018
更新日期:2017-10-01 00:00:00
abstract:BACKGROUND:Oxi4503 has been shown to inhibit tumor growth and improve survival in an animal model of colorectal (CRC) liver metastases. This agent appears to selectively target the endothelial cytoskeleton with resultant vessel occlusion and tumor necrosis. MATERIALS AND METHODS:This study evaluated the pattern of tum...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2007-07-01 00:00:00
abstract::Polymerase chain reaction and single strand conformation polymorphism (PCR-SSCP) analysis of the p53 tumor suppressor gene (from exon 2 to 9) was performed on samples from 47 adult patients with primary myelodysplastic syndrome (MDS). Point mutation was found in 5 (11%) patients: exon 7 in 3, exon 4 in 1 and intron 5 ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1998-09-01 00:00:00
abstract:BACKGROUND:Patients with advanced pancreatic carcinoma have a risk of relapse after primary therapy, and the prognosis for these patients remains bleak. The effect of immuno-cell therapy in advanced pancreatic carcinoma, with or without other standard therapies, was examined. PATIENTS AND METHODS:Forty-six patients wi...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2005-11-01 00:00:00
abstract:BACKGROUND:Pomegranate extract (PE) is a standardized whole-fruit extract of pomegranate, a fruit with known anticancer properties. MATERIALS AND METHODS:PANC-1 and AsPC-1 human pancreatic cancer cells were used as in vitro models to test the effects of PE. RESULTS:PE treatment induced cell cycle arrest and inhibited...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2011-09-01 00:00:00
abstract::Although some types of intestinal metaplasia are considered to be potentially pre-malignant lesions leading to gastric carcinoma, their high frequency and variability limit their usefulness as early markers of malignant progression. The present study was carried out to search for parameters which could be used in conj...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1996-03-01 00:00:00
abstract:BACKGROUND/AIM:Quinazolinone is a privileged chemical structure employed for targeting various types of cancer. This study aimed to demonstrate the antitumor activity of synthesized 6,7-disubstituted-2-(3-fluorophenyl) quinazolines (HoLu-11 to HoLu-14). MATERIALS AND METHODS:The cytotoxicity was assessed by the sulfor...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.14772
更新日期:2021-01-01 00:00:00
abstract:BACKGROUND/AIM:Occult cancers' reported rates vary from 2-12% and serous tubal intraepithelial carcinomas (STICs) have been identified in 3-12% of the prophylactically removed tubes of women carrying a BRCA mutation. The aim of this study was to evaluate the incidence of tubal minor epithelial atypia (STIL), STIC, and ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.11948
更新日期:2017-09-01 00:00:00
abstract:AIM:To evaluate the influence on relapse-free survival (RFS) and overall survival (OS) of a transitory protective stoma (TPS) at the time of complete cytoreductive surgery for advanced-stage ovarian cancer. PATIENTS AND METHODS:From our Institution, we retrospectively selected patients from 2006 to 2011 with ovarian c...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.12379
更新日期:2018-03-01 00:00:00
abstract:BACKGROUND:The aim of this study was to investigate whether tributyrin, a natural butyrate pro-drug, as well as butyrate itself could affect growth, differentiation and apoptosis in two human pancreatic cancer cell lines in culture. MATERIALS AND METHODS:Proliferation was studied by cell counting using crystal violet ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2001-07-01 00:00:00
abstract:BACKGROUND:MicroRNAs are able to control vital tumor biological processes, such as proliferation, tissue transformation and cell migration, as well as apoptosis. One of the micro RNAs, namely miR-1, has been classified as a tumor suppressor, however, preliminary data did not confirm this finding in ovarian cancer (OC) ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2016-07-01 00:00:00
abstract::Bcl-2 oncoprotein, a member of a new category of oncogenes associated with the regulation of programmed cell death (apoptosis), has been considered to be involved in biological processes such as tumorigenesis and tumor development. To determine the role of bcl-2 oncoprotein in lung cancer, we preliminarily examined th...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1995-03-01 00:00:00
abstract::Chronic treatment with Sasa Health, extract of bamboo grass leaves obtained by alkaline hydrolysis, in drinking water at the concentration of 0.044%-0.088% Fe-Chlorophyllin Na resulted in the significant inhibition of both development and growth of spontaneous mammary tumours in a high mammary tumour strain of SHN vir...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract:BACKGROUND:We used non-linear kernel discriminant analysis (KDA) to predict the outcome of 134 axillary node-negative primary breast cancer patients not treated with adjuvant therapy in a non censored database. MATERIAL:Posterior probabilities of relapse at 5 years were estimated using probabilistic neural networks (P...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2000-05-01 00:00:00