Abstract:
:Because most cancer deaths result from disseminated disease, understanding the regulation of tumor invasion and metastasis is a central theme in tumor cell biology. Interactions between extracellular matrices (ECM) and cellular microenvironment play a crucial role in this process. We have tested selected amino acids and polyamines for their ability to regulate RL95-2 cell invasion through both intact human amniotic basement membrane and a novel human ECM (Amgel). Three major systems for neutral amino acid transport, systems L, A, and ASC, are operational in these neoplastic cells. Amino acids entering the cell via transport system A or N, i.e., (methyl amino)-isobutyrate (MeAIB) or Asn, markedly enhanced invasiveness of these human adenocarcinoma cells as measured by a standard 72-hr amnion or Amgel invasion assay. Addition of 2-amino-2-norborane carboxylic acid (BCH; 1 mM), a model substrate of the L transport system, caused a significant decrease in invasive activity when tested in the Amgel assay. Interestingly, Val lowers steady-state levels of MeAIB uptake and blocks the increase in cell invasion elicited by MeAIB. At the same time, these amino acids do not influence cell proliferation activity. Neither the charged amino acid Lys or Asp (not transported by A/N/L systems) nor the polyamines putrescine, spermidine, or spermine modulate invasiveness under similar experimental conditions. Moreover, the observed time-dependent stimulation of system A activity (cellular influx of MeAIB) by substrate depletion is prevented by the addition of actinomycin D (5 microM) or cycloheximide (100 microM), suggesting the involvement of de novo RNA and protein synthesis events in these processes. MeAIB treatment of tumor cells selectively increased the activities of key invasion-associated type IV collagenases/gelatinases. These results indicate that in the absence of defined regulators (growth factors or hormones), certain amino acids may contribute to the epigenetic control of human tumor cell invasion and, by extension, metastasis. We propose that amino acids, acting via specific signaling pathways, modulate phenotypic cell behavior by modulating the levels of key regulatory enzymatic proteins.
journal_name
Cancer Investjournal_title
Cancer investigationauthors
Singh RK,Rinehart CA,Kim JP,Tolleson-Rinehart S,Lawing LF,Kaufman DG,Siegal GPdoi
10.3109/07357909609018433subject
Has Abstractpub_date
1996-01-01 00:00:00pages
6-18issue
1eissn
0735-7907issn
1532-4192journal_volume
14pub_type
杂志文章abstract::This survey aimed at getting a first insight into diverse side effects and their association with satisfaction with life as well as the use of complementary and alternative medicine (CAM) in cancer patients. A total of 100 patients in a German University Hospital were included. General side effects like fatigue, fever...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.1080/07357907.2019.1625055
更新日期:2019-01-01 00:00:00
abstract::Peroxiredoxins are thiol-specific antioxidant proteins that protect cells from ROS-induced cell death and are elevated in several cancers. We found that five of the six mammalian peroxiredoxins are overexpressed in MCF-7 breast cancer cells at the mRNA and protein levels, compared to noncancerous MCF-10A cells. Inhibi...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357907.2013.802798
更新日期:2013-07-01 00:00:00
abstract::A patient with cervical metastases leading to the diagnosis of a primary breast cancer is presented. To better define the frequency, symptoms, and characteristics of breast cancer metastasizing to the uterine cervix, all cases reported in the literature since 1950 are reviewed. This analysis reveals that in 21% of the...
journal_title:Cancer investigation
pub_type: 杂志文章,评审
doi:10.3109/07357909909032855
更新日期:1999-01-01 00:00:00
abstract::Based on cost-effective ratio, there has not yet been imaging methods suitable for breast cancer screening in young women. The aim of this study was to evaluate the sensitivity and specificity of the combination of electrical impedance scanning (EIS) and ultrasound in identifying breast cancer for young women, to calc...
journal_title:Cancer investigation
pub_type: 杂志文章,多中心研究
doi:10.3109/07357900802203658
更新日期:2010-03-01 00:00:00
abstract::Platelet-derived growth factor D (PDGF-D) has been shown to mediate cellular processes of importance in cancer progression. This study aimed to investigate the expression and putative involvement of PDGF-D signaling in colorectal carcinogenesis. PDGF-D was expressed in vascular endothelial cells in tumor and normal ti...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.1080/07357907.2019.1576191
更新日期:2019-01-01 00:00:00
abstract::Tumorigenesis is known to result from multiple genetic changes. Although endogenous and environmental insults can damage DNA, cellular mechanisms exist to repair various forms of damage or to kill those cells irreparably damaged. Hence, the accumulation of numerous genetic changes that would lead to cancer in normal c...
journal_title:Cancer investigation
pub_type: 杂志文章,评审
doi:10.3109/07357900009023065
更新日期:2000-01-01 00:00:00
abstract::Mice bearing LP07 lung adenocarcinoma present some characteristics similar to those shown in patients with several malignant diseases. LP07 tumor bearers develop paraneoplastic syndromes such as cachexia, leukocytosis, and hypercalcemia, partly due to a systemic inflammatory response. We analyzed some of the mechanism...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.1080/07357900500524322
更新日期:2006-03-01 00:00:00
abstract:BACKGROUND:A 96-hour infusion schedule of paclitaxel demonstrates tolerability and antitumor activity in lung cancer and breast cancer refractory to short-duration infusion paclitaxel. Given the activity of paclitaxel in esophageal cancer, a phase II trial of 96-hour infusion paclitaxel in esophageal cancer was underta...
journal_title:Cancer investigation
pub_type: 临床试验,杂志文章
doi:10.1081/cnv-120022360
更新日期:2003-01-01 00:00:00
abstract::A Phase I trial of three carboplatin-based combination chemotherapy regimens was conducted. These included: carboplatin plus vindesine; carboplatin, vindesine, plus bleomycin; and, carboplatin plus vinblastine. Carboplatin was administered every 28 days as an intravenous bolus. The initial dose was 150 mg/m2 and doses...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357909009017558
更新日期:1990-01-01 00:00:00
abstract::A dosimetric comparison was made of Helical Tomotherapy (HT) and Rapid'Arc(®) (RA) in 115 patients with head and neck carcinoma included in a prospective and multicentric study. HT and RA provided highly conformal plans that easily complied with dose volume constraints for organs at risk. HT reduced high doses to the ...
journal_title:Cancer investigation
pub_type: 杂志文章,多中心研究
doi:10.3109/07357907.2014.889705
更新日期:2014-06-01 00:00:00
abstract:UNLABELLED:The effect of castration on the incorporation of [35S]methionine into secreted proteins in 7,12-dimethylbenz(a)anthracene (DMBA)-induced rat mammary tumors, was investigated. Biopsy specimens were obtained from 19 tumors, 0, 24, 48, 72, and 96 h after castration. In 14 tumors, castration induced an increase ...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357909209032762
更新日期:1992-01-01 00:00:00
abstract::CXCL12 is an extracellular chemokine binding to cell surface receptor CXCR4. We found that activation of CXCL12/CXCR4 axis stimulated angiogenesis in endothelial cells. Knockdown of CXCR4 in endothelial cells prevented the branch points of angiogenesis. Endothelial cells exposed to CXCL12 presented high level of epide...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.1080/07357907.2017.1422512
更新日期:2018-01-02 00:00:00
abstract::As genetic testing for BRCA1 and BRCA2 (BRCA1/2) mutations is increasingly integrated into the clinical management of high-risk women, it will be important to understand barriers and motivations for genetic counseling among women from underserved minority groups to ensure equitable access to these services. Therefore,...
journal_title:Cancer investigation
pub_type: 杂志文章,评审
doi:10.1081/cnv-58819
更新日期:2005-01-01 00:00:00
abstract::The host immune response can impact cancer growth, prognosis, and response to therapy. In colorectal cancer, the presence of cells involved with T-cell-mediated adaptive immunity predicts survival better than the current staging method. We used the expression of genes recently associated with host immune responses (T(...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357900903095755
更新日期:2010-08-01 00:00:00
abstract::Serum C-reactive protein (CRP), a sensitive marker of systemic inflammation, has been reported to be associated with the risk of a number of cancers including breast cancer. However, the results are inconsistent. To investigate the association between serum CRP levels and early breast cancer, we conducted a hospital-b...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357907.2013.789898
更新日期:2013-05-01 00:00:00
abstract:OBJECTIVES:To evaluate the efficacy and toxicity of the combination of vinorelbine and interleukin (IL)-2 in patients with metastatic melanoma as second-line chemotherapy. PATIENTS AND METHODS:Twenty-two patients with histologically confirmed stage IV melanoma previously treated with temozolomide-based chemotherapy--o...
journal_title:Cancer investigation
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1081/cnv-200039630
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND:We conducted a phase I study to determine the maximum tolerated dose of docetaxel in combination with gemcitabine for patients with refractory solid tumors. METHODS:From January 1998 to November 1999, we treated 28 patients on a phase I protocol with gemcitabine given at a constant dose of 800 mg/m2 i.v. ov...
journal_title:Cancer investigation
pub_type: 临床试验,杂志文章
doi:10.1081/cnv-120018225
更新日期:2003-06-01 00:00:00
abstract::Breast cancer treatment is recognized as the most common cause of secondary lymphedema (LE) in the developed countries of the world. LE occurs as both an acute and chronic health condition in which significant and persistent swelling is associated with an abnormal accumulation of protein-rich fluid. The impact of LE i...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract::Withaferin A (WA) (1) and two analogs [4-epi-withaferin A (2) and 4,27-diacetyl-4-epi-withaferin A (3)] were evaluated for antitumor activity in pancreatic cancer cells. IC(50) for 1, 2, and 3 were 0.87, 0.45, and 0.29 ?M (BxPC-3); 1.28, 1.53, and 0.52 ?M (MIAPaCa-2); and 0.59, 2.25, and 0.56 ?M (PANC-1), respectively...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357907.2011.626478
更新日期:2011-12-01 00:00:00
abstract::Gastrointestinal stromal tumors (GIST) are tumors most frequently found in adults. They are often related to activating mutations in the CD-117 tyrosine kinase receptor, most commonly at exon 11. Gastrointestinal stromal tumors have been reported in children. However, until recently, there had not been reports of acti...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.1080/07357900701637824
更新日期:2008-03-01 00:00:00
abstract::IFN regulatory factor 4 binding protein (IBP) has been shown to play an important role in the progression of malignant tumors such as breast cancer cells, but its function in oral squamous cell carcinoma (OSCC) remains unclear. We found that IBP ectopically expressed in some OSCC specimens but not in normal oral mucos...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357907.2012.734355
更新日期:2012-12-01 00:00:00
abstract:OBJECTIVE:Patients with systemic malignancies have substantial quantities of tumor-specific DNA in their plasma which may serve as a potential biomarker for tumor burden. This approach has not been studied in gliomas. METHODS:Methylation specific polymerase chain reaction (MSP) was used to determine the methylation st...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.1080/07357900500449546
更新日期:2006-02-01 00:00:00
abstract::The limited capacity to divide is one of the major differences between normal somatic cells and cancerous cells. This 'finite life span' of somatic cells is closely linked to loss of telomeric DNA at telomeres, the 'chromosome caps' consisting of repeated (7TAGGG) sequences., In more than 85% of advanced cancers, this...
journal_title:Cancer investigation
pub_type: 杂志文章,评审
doi:10.1081/cnv-120000370
更新日期:2002-01-01 00:00:00
abstract::Precise quantification of oral complications in cancer patients receiving bone marrow and stem cell transplantation is essential when testing new treatment strategies for mucositis. Using 133 adult transplant patients, the authors evaluated the 20 item oral mucositis index (OMI), adapted from the 34 item OMI, to facil...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.1081/cnv-120005902
更新日期:2002-01-01 00:00:00
abstract::While cancer remains an important public health concern, novel and enhanced treatment modalities have increased the length of survival of individuals diagnosed with the disease. The treatment of most cancers requires the use of chemotherapeutic agents to affect cure, maintain control of the disease, or provide palliat...
journal_title:Cancer investigation
pub_type: 杂志文章,评审
doi:10.1081/cnv-120018236
更新日期:2003-06-01 00:00:00
abstract::The aim of the current study was to determine the signaling differences between gamma- and proton beam-irradiations. A549 lung adenocarcinoma cells were irradiated with 2 Gy proton beam or gamma-radiation. Proton beam was found to be more cytotoxic than gamma-radiation. Proton beam-irradiated cells showed phosphorylat...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357901003630991
更新日期:2010-07-01 00:00:00
abstract::Several recent studies have indicated that alterations in expression of major histocompatibility complex (MHC) antigens by tumor cells affects the ability of the host to mount an effective antitumor immune response. To investigate whether newly induced tumors frequently exhibit altered MHC antigen expression, we used ...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.3109/07357909109021324
更新日期:1991-01-01 00:00:00
abstract::Renal cell carcinoma is the most common tumor of the kidney. It has an unpredictable behavior and poor response to systemic therapy. Developing newer therapy for this disease is a priority considering the high recurrence rate and the small subset of patients who benefit from the use of cytokines such as interferon-alp...
journal_title:Cancer investigation
pub_type: 杂志文章,评审
doi:10.1080/07357900600896315
更新日期:2006-10-01 00:00:00
abstract::Cells from 11 chronic lymphocytic leukemic (CLL) patients were induced to differentiate with various doses of tetradecanoyl phorbol-13-acetate (TPA) and the degree of induction was followed up to six days by measuring the expression of two surface membrane markers (SmIg and GP-70), Ig secretion, tartrate-resistant aci...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:
更新日期:1987-01-01 00:00:00
abstract::To determine the role of the reactive stroma in cancer progression, we investigated decorin (DCN) and transforming growth factor-beta (TGF-beta expression, and matrix metalloproteinase-2 (MMP-2) activity in the tumorous esophagus. We found statistically insignificantly decreased levels of DCN expression in the patholo...
journal_title:Cancer investigation
pub_type: 杂志文章
doi:10.1080/07357900802527221
更新日期:2009-05-01 00:00:00