Abstract:
:Homogeneous subpopulations, which are endowed with low or high metastatic potential, were selected from Lewis lung carcinoma (3LL) in an attempt to correlate metastatic phenotype with specific properties of tumor cells. Since the growth of malignant cells at secondary sites could depend on their ability to respond to microenvironments, the growth factor dependence of 3LL variants has been studied. The ability of variant lines to grow in monolayer and in soft agar cultures, either in the presence or absence of different growth factors or serum, was analyzed and correlated with their metastatic potential. The reported results demonstrate that tumor cells expressing higher metastatic potential also exhibit higher capacity to grow and proliferate in all the culture conditions tested, independently of the addition of exogenous growth factors or serum. Moreover, since highly metastasizing cells express a significant amount of TGF-beta 1 mRNA, a pattern of autocrine growth is postulated for 3LL metastatic cells. One relevant aspect of the phenotype of transformed cells is their reduced adhesion to solid substrates; this phenomenon is thought to reflect the invasive and metastatic potential of tumor cells. Since the adhesion of the cells to substrata is mediated by molecules of the extracellular matrix, the expression of extracellular matrix receptors (integrins) was studied on 3LL metastatic variants. In particular, through immunochemical and biochemical studies we investigated the expression of the laminin receptor(alpha 6/beta 1) and of a novel receptor (integrin: alpha 6/beta 4), of unknown function. The receptors were quantitated on the cell surface of 3LL variants by the use of specific monoclonal antibodies which recognize, respectively, different epitopes of alpha 6, beta 4 or beta 1 subunits. Results demonstrate that the novel integrin alpha 6/beta 4, is specifically expressed in highly metastasizing 3LL cells, whereas the laminin receptor alpha 6/beta 1 is expressed in all 3LL variants. In conclusion, data presented demonstrate that 3LL cells endowed with higher metastatic potential are more independent of the microenvironmental conditions in that they possess a higher autocrine capacity than the lower metastasizing ones, and could acquire higher capacity to invade through the expression on their cell surface of specific receptors for cell adhesion (the novel integrin, defined as alpha 6/beta 4).
journal_name
Anticancer Resjournal_title
Anticancer researchauthors
Perrotti D,Cimino L,Falcioni R,Tibursi G,Gentileschi MP,Sacchi Asubject
Has Abstractpub_date
1990-11-01 00:00:00pages
1587-97issue
6eissn
0250-7005issn
1791-7530journal_volume
10pub_type
杂志文章abstract:BACKGROUND/AIM:The aim of this study was to evaluate the impact of laparoscopic gastrectomy (LG) for gastric cancer on long-term survival in patients with postoperative infectious complications (PIC). PATIENTS AND METHODS:A total of 608 patients who underwent gastrectomy were classified into two groups based on the su...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.14740
更新日期:2020-12-01 00:00:00
abstract:BACKGROUND:Ribonucleotide reductase composed of the hRRM1 and hRRM2 subunits catalyzes the conversion of ribonucleotides to their corresponding deoxy forms for DNA replication. Anti-hRRM2 siRNA degrades hRRM2's mRNA and suppresses tumorigenesis. A Phase I clinical trial demonstrated its therapy potential. HN-1 represen...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2012-11-01 00:00:00
abstract::The anticancer effects of retinoids have been recognized both in vivo and in vitro; however, little is known about their mechanism of action. Our study evaluated the effects of retinoic acid on the invasiveness of four human melanoma cell lines in vitro and showed a time-dependent inhibition of the ability of these ce...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1990-03-01 00:00:00
abstract:BACKGROUND:Granulosa cell tumors (GCT) are rare malignant neoplasms of the ovaries with, usually, indolent biological behavior. PATIENTS AND METHODS:The epidemiological, clinical and pathological features of 34 patients with adult GCT, from the registry of the HeCOG, were analyzed retrospectively for their prognostic ...
journal_title:Anticancer research
pub_type: 杂志文章,多中心研究
doi:
更新日期:2008-03-01 00:00:00
abstract::12-O-retinoylphorbol-13-acetate (RPA), an incomplete tumor promoter of the phorbol ester type and protein kinase C (PKC) activator, consists of two characteristic structural elements: the phorbol body and the retinoyl ester chain. Therefore, possible binding of the incomplete tumor promoter RPA to the human transport ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2005-09-01 00:00:00
abstract:BACKGROUND:The influence of age on the patterns and outcomes of external beam radiotherapy for clinically localized prostate cancer patients was examined. MATERIALS AND METHODS:The Japanese Patterns of Care Study surveys were used to compare the processes and outcomes of radical external beam radiotherapy in 140 elder...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2006-03-01 00:00:00
abstract:BACKGROUND:Nucleophosmin-anaplastic lymphoma kinase expression is associated with a lymphoid malignancy, anaplastic large cell lymphoma, and is characterized by a t(2;5) chromosomal translocation. MATERIALS AND METHODS:We describe a novel transgenic mouse line in which NPM-ALK expression is targeted to the T-cell line...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2006-09-01 00:00:00
abstract:BACKGROUND:Gemcitabine (dFdC) may cause radiosensitization by specific interference with homologous recombination-mediated DNA double-strand break repair. The radiosensitizing effect of dFdC might be less in normal healthy tissue and more restricted to undifferentiated tumor cells, making it a tumor-selective radiosens...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2006-01-01 00:00:00
abstract:BACKGROUND:Lung cancer cells often express vimentin. However, the function of vimentin in lung cancer cells has not been fully evaluated. MATERIALS AND METHODS:We evaluated the association between vimentin expression in resected non-small cell lung cancer (NSCLC) specimens and prognosis. Short-interfering RNA targetin...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2016-04-01 00:00:00
abstract:BACKGROUND:Extracts from Viscum album L. (VAL), which are one of the most widely used alternative cancer therapies in Europe, have been recognised to induce apoptosis. A clinically relevant direct anti-tumour effect might be induced only by their intratumoural or intrapleural injection, and thus effectiveness is highly...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1999-01-01 00:00:00
abstract::The PTEN gene is a tumor-suppressor gene that is inactivated in several types of human tumors. The loss of PTEN expression has been supported as a prognostic marker. Using immunohistochemical analysis, we retrospectively analyzed PTEN expression in specimens from 53 patients with completely resected stage I non-small ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2003-11-01 00:00:00
abstract:BACKGROUND/AIM:Trans-hiatal and -cervical approach mediastinoscopic radical esophagectomy (TMrE) for esophageal cancers is a less-invasive procedure and does not require for trans-thoracic approach management. However, some patients suffer from pleural effusion after TMrE. In the present study, we investigated the clin...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.13069
更新日期:2018-12-01 00:00:00
abstract:BACKGROUND:Lysozyme is a natural antimicrobial enzyme that is up-regulated in inflammatory diseases of the gastrointestinal tract. Pathogenic microbes have recently been identified in the esophageal mucosa in patients with Barrett's esophagus (BE). Lysozyme expression was evaluated in biopsies from patients with BE. M...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2012-11-01 00:00:00
abstract::The aim of this study was to determine a possible risk of malignancies in the haematopoietic tissues of rats treated with styrene, either by injection or by inhalation. Two experiments were carried out: in the first (acute treatment), 12 male rats were treated intraperitoneally with different doses of styrene (40 mg/K...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2000-05-01 00:00:00
abstract::At present the available treatment modalities are not therapeutic for disseminated stage III- and IV melanoma. The management of these patients therefore concentrates primarily on effective palliation taking care to improve the quality of life. As an exception from this rule, patients with regional or solitary metasta...
journal_title:Anticancer research
pub_type: 临床试验,杂志文章
doi:
更新日期:1987-05-01 00:00:00
abstract:BACKGROUND/AIM:Extracts of Paeonia suffruticosa are traditionally used in Chinese medicine to increase blood flow. Recently, this extract has been shown to possess anti-tumor and anti-inflammatory properties, though this mechanism remains unknown. In the current work, we prepared extracts of P. suffruticosa and analyze...
journal_title:Anticancer research
pub_type: 杂志文章
doi:10.21873/anticanres.11888
更新日期:2017-09-01 00:00:00
abstract::The belief that n-3 polyunsaturated fatty acids are in general cytotoxic to tumor cells appears not to be accurate. Of four tumor cell lines exposed to 35 microM docosahexaenoic acid (DHA, 22:6 n-3), we found only one (A-427, lung carcinoma) to be sensitive, whereas three (A-172, A549 and SK-LU-1) in fact were stimula...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1997-07-01 00:00:00
abstract::Telomerase activity is associated with most malignant tumors. To evaluate the role of telomerase reactivation as a diagnostic and prognostic marker in oral carcinogenesis activity was investigated in mortal and immortal cell lines in eight oral leukoplakias (OL) and 46 oral squamous cell carcinomas (OSCC). Activity wa...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2001-03-01 00:00:00
abstract::The antitumor activity of (2''R)-4'-O-tetrahydropyranyl adriamycin (pirarubicin; THP) was assessed using human gastric cancer cell lines in vitro and in vivo. The cytotoxicity of THP on MKN-28 and MKN-45 was superior to that of adriamycin (ADM) as detected by a growth assay with an MTT colorimetric endpoint. When the ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1994-03-01 00:00:00
abstract::A clearly benign parotid tumor, an adenolymphoma, was studied cytogenetically using short-term cultured material. The first preparation showed only a normal stemline. The two subsequent preparations were both characterized by a pseudodiploid stemline with the karyotype 46,XY,del(7) (p12p14-15), t(11;19) (q21;p12-13). ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1989-11-01 00:00:00
abstract::Thirty-four patients of an Italian population affected by neuroblastoma (NB) were evaluated at diagnosis for multidrug resistance gene (MDR1) and N-myc oncogene amplification. No patients showed MDR1 amplification, while extra copies of the N-myc gene were found in 9 out of 34 patients (26%). N-myc amplification was c...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1990-07-01 00:00:00
abstract::The chemotherapeutic agent retinoic acid (RA) inhibits the proliferation and invasion of many tumor types. RA chemotherapy in head and neck squamous cell carcinoma (SCC) patients reduces recurrence and induces regression of premalignant lesions. The effects of RA are mediated by both cytoplasmic and nuclear proteins. ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract:BACKGROUND:Previous studies have shown that tumor necrosis factor-alpha (TNF-alpha) encapsulated in sterically-stabilized PEGylated STEALTH liposomes (SL) can better and more safely augment the efficacy of other treatment modalities than free TNF-alpha. The aim of this study was to examine the effects of SL-TNF-alpha i...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2002-03-01 00:00:00
abstract::Non-small-cell lung cancer (NSCLC) ranks as a leading cause of cancer-related death globally. Brain metastases are a frequent complication of NSCLC, with 25-40% of patients developing brain metastases during the course of the disease, often within the first 2 years after diagnosis of the primary tumor. Improvements in...
journal_title:Anticancer research
pub_type: 杂志文章,评审
doi:
更新日期:2015-11-01 00:00:00
abstract::Membrane permeability is a critical parameter which must be assessed in the course of new potential anticancer drug studies. Flow cytometry allows us to monitor the permeability status of living cells through the measurement of fluorochrome retention; conventionally this is done using fluorescein diacetate or Hoechst3...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1990-03-01 00:00:00
abstract:BACKGROUND:The aim of this study was to investigate the expression of thymidine phosphorylase (TP), a known angiogenic factor for endothelial cells, in gastric carcinoma cells and tumor-associated stromal cells. MATERIALS AND METHODS:Sixty-six gastric carcinomas were studied. TP expression was assessed with the P-GF.4...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2006-09-01 00:00:00
abstract::Iron salts supplemented in a basal ratio, were fed to young Sprague-Dawley male rats for prolonged periods and the frequency of colonic adenocarcinomas induced by repeated s.c. injection of 1,2-dimethylhydrazine (DMH) at unit base doses of 9.0 mg/kg, ascertained and compared with the respective controls. In a series e...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1993-11-01 00:00:00
abstract:BACKGROUND AND AIMS:We examined the prognostic value of pre-treatment C-reactive protein (CRP) after surgical resection (SR) for hepatocellular carcinoma (HCC). PATIENTS AND METHODS:A total of 298 patients with HCC who underwent SR were analyzed. They were categorized into a CRP-positive group (group A: CRP >0.2 mg/dl...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2013-03-01 00:00:00
abstract::The antitumor effects of the somatostatin structural derivative TT-232 in different rodent and xenograft tumor models are summarized in this report. TT-232 had previously been shown to inhibit the proliferation of a large number of cancer cell lines in vitro and reduce the size of different tumors in animal models in ...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:2006-09-01 00:00:00
abstract::Smokeless tobacco consumption is causally associated with oral cavity cancers; however, extensive cytogenetic studies have not been done. In the present study, individuals consuming dry snuff or tobacco with lime have been studied for frequency of micronucleated cells (MNC) in exfoliated buccal mucosa and chromosome a...
journal_title:Anticancer research
pub_type: 杂志文章
doi:
更新日期:1993-11-01 00:00:00