Abstract:
:Endogenous formation of N-nitrosoproline (NPRO) was demonstrated by monitoring its excretion in the urine of a male volunteer who had ingested vegetable juice, as a source of nitrate, and proline. The resulting NPRO was analyzed after derivatization by combined gas-liquid chromatography thermal energy analysis. The amount of total NPRO excreted in the urine was found to be proportional to the proline dose and increased exponentially with the nitrate dose ingested. Neither nitrate nor proline, when taken alone, led to a detectable increase in NPRO in urine. The amounts of NPRO formed (as estimated from the amounts excreted within 24 hr) after dosing 325 mg nitrate (NO3-) followed by 500 mg proline, ranged from 16.6 to 30.0 (mean, 23.3) micrograms per person. The simultaneous intake of ascorbic acid or alpha-tocopherol inhibited nitrosation of proline in vivo. Monitoring of NPRO or other N-nitroso compounds excreted in the urine thus appears to be a suitable procedure for estimating daily human exposure to endogenously formed N-nitroso compounds.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Ohshima H,Bartsch Hsubject
Has Abstractpub_date
1981-09-01 00:00:00pages
3658-62issue
9 Pt 1eissn
0008-5472issn
1538-7445journal_volume
41pub_type
杂志文章相关文献
CANCER RESEARCH文献大全abstract::Mutations in the parkin gene, which encodes a ubiquitin ligase, are a major genetic cause of parkinsonism. Interestingly, parkin also plays a role in cancer as a putative tumor suppressor, and the gene is frequently targeted by deletion and inactivation in human malignant tumors. Here, we investigated a potential tumo...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-11-3060
更新日期:2012-05-15 00:00:00
abstract::Chloroethylnitrosoureas (CNUs) are being used in the therapy of various neoplastic diseases, including skin cancer. Because secondary tumor formation is a serious threat in chemotherapy with these drugs, we explored whether and to what extent the DNA repair protein DNA-O6-methylguanine:protein-L-cysteine S-methyltrans...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1997-08-15 00:00:00
abstract::Dilution end point loss of heterozygosity (LOH) analysis, a novel approach for the analysis of LOH, was used to evaluate allelic losses with the use of 21 highly polymorphic microsatellite markers at nine chromosomal sites most frequently affected in smoking-related non-small cell lung cancers. Allelotyping was done f...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-04-3297
更新日期:2005-03-01 00:00:00
abstract::Mortality surveys and death certificate studies have suggested an association between leukemia and farming. To investigate whether exposure to carcinogens in an agricultural setting is related to risk of leukemia, the authors conducted a population-based case-control interview study of 578 white men with leukemia and ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1990-10-15 00:00:00
abstract::Although numerous studies have implicated vitamin D in preventing prostate cancer, the underlying mechanism(s) remains unclear. Using normal human prostatic epithelial cells, we examined the role of mitogen-activated protein kinase phosphatase 5 (MKP5) in mediating cancer preventive activities of vitamin D. Up-regulat...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-05-3796
更新日期:2006-04-15 00:00:00
abstract::The cytotoxic activity against human tumor cells of toxic conjugates of Pseudomonas exotoxin with anti-transferrin receptor antibody or epidermal growth factor was potentiated up to 10 to 20-fold by the calcium antagonists verapamil, D-600, and diltiazem and by the lysosomotropic agent beta-glycylphenyl-naphthylamide....
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1985-03-01 00:00:00
abstract::Phosphatidylinositol-3-kinase is an important enzyme for intracellular signaling. The microbial product wortmannin and some of its analogues have been shown to be potent inhibitors of phosphatidylinositol-3-kinase. The 50% inhibitory concentration for inhibition by wortmannin is 2 to 4 nM. Kinetic analysis demonstrate...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1994-05-01 00:00:00
abstract::Astrocytes, the most abundant type of glial cells in the brain, play critical roles in supporting neuronal development and brain function. Although astrocytes have been frequently detected in brain tumors, including medulloblastoma (MB), their functions in tumorigenesis are not clear. Here, we demonstrate that astrocy...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-17-1463
更新日期:2017-12-01 00:00:00
abstract::Ornithine decarboxylase (ODC) is a rate-limiting enzyme in the first step of polyamine biosynthesis that is associated with cell growth and tumor formation. Existing catalytic inhibitors of ODC have lacked efficacy in clinical testing or displayed unacceptable toxicity. In this study, we report the identification of a...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-15-0442
更新日期:2016-03-01 00:00:00
abstract::The transcription factor activating transcription factor 2 (ATF2) has been shown to be associated with melanocytic oncogenesis and melanoma tumor proliferation in preclinical models. The clinical significance of ATF2 expression is unknown. To determine the prognostic value of ATF2 in melanoma, we evaluated the pattern...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:2003-12-01 00:00:00
abstract::SOX9 is a member of the SOX [Sry-related high-mobility group (HMG) box] family of HMG DNA-binding domain transcription factors and is required for the development and differentiation of multiple cell lineages. This report shows that basal epithelial cells express SOX9 in normal prostate, with no detectable expression ...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-06-1672
更新日期:2007-01-15 00:00:00
abstract::Alterations in the expression of the epidermal growth factor (EGF) receptor ErbB family are frequently encountered in a number of human cancers. Two of these receptors, ErbB3 and ErbB4, are known to bind a family of related proteins termed heregulins (HRGs) or neu differentiation factors. In biologically relevant syst...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1996-03-15 00:00:00
abstract::Exfoliated cytologic specimens from mouth (buccal) epithelium may contain viable cells, permitting assay of gene expression for direct and noninvasive measurement of gene-environment interactions, such as for inhalation (e.g., tobacco smoke) exposures. We determined specific mRNA levels in exfoliated buccal cells coll...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-04-1771
更新日期:2004-09-15 00:00:00
abstract::The predominant early histological changes in irradiated tissues are edema and leukocyte infiltration. Cell adhesion molecules (CAMs) are required for the extravasation of leukocytes from the circulation. To study the role of CAMs in the pathogenesis of radiation-mediated inflammation, we quantified the expression of ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1996-11-15 00:00:00
abstract::Tumorigenesis can arise from inappropriate activation of developmental genes in mature tissues. Here, we show that the developmental regulator Six1 is overexpressed in ovarian carcinoma cell lines (OCC) compared with normal ovarian surface epithelium. As observed in other cancers, Six1 overexpression in OCC leads to i...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-06-3755
更新日期:2007-04-01 00:00:00
abstract::ErbB2 and ErbB3, two members of the ErbB family, form a high-affinity heregulin coreceptor that elicits potent mitogenic and transforming signals, and clinical studies indicate that these receptors play an important role in tumor incidence and progression. To determine whether N-glycosylation is involved in the functi...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-06-3023
更新日期:2007-03-01 00:00:00
abstract::Whether oncogenic human papilloma viruses (HPVs) are involved in the pathogenesis of prostate cancers has been a subject of great controversy. To clarify the contradictory results of investigations, with the aim of detecting viral nucleic acids in prostate cancers, we have carried out a comparative quantitation of the...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1999-02-15 00:00:00
abstract::When the human cell line NHIK 3025 was exposed to retinoic acid (1 nM; 10 microM), the cell cycle time was prolonged. Experiments using cells synchronized by mitotic selection showed that the retinoic acid induced growth delay was barely seen within the first cell cycle after exposure to 10 microM retinoic acid, where...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1986-03-01 00:00:00
abstract::Endocrine therapies effectively improve the outcomes of patients with estrogen receptor (ER)-positive breast cancer. However, the emergence of drug-resistant tumors creates a core clinical challenge. In breast cancer cells rendered resistant to the antiestrogen fulvestrant, we defined causative mechanistic roles for t...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-16-1593
更新日期:2017-01-15 00:00:00
abstract::Barrett's esophagus, a columnar metaplasia of the lower esophagus epithelium related to gastroesophageal reflux disease, is the strongest known risk factor for the development of esophageal adenocarcinoma (EAC). Understanding the signal transduction events involved in esophageal epithelium carcinogenesis may provide i...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-07-5460
更新日期:2008-04-15 00:00:00
abstract::Members of the phosphatidylinositol 3-kinase-related kinase family, in particular the ataxia-telangiectasia mutated (ATM) kinase and the catalytic subunit of the DNA-dependent protein kinase (DNA-PKcs), regulate cellular responses to DNA double-strand breaks. Increased sensitivity to ionizing radiation (IR) in DNA-PKc...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-07-0675
更新日期:2008-01-01 00:00:00
abstract::The paracrine influence of prostatic stromal cell proteins on a neoplastic prostate cell line (PA-III) was investigated. We have utilized an in vitro experimental model whereby confluent epithelial sheets of PA-III cells are grown on Matrigel-coated filters in bicameral chambers (Millicell-HA). Confluence of the epith...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1990-03-15 00:00:00
abstract::The aim of this study was to evaluate to what extent tumor necrosis factor alpha (TNF-alpha) and interleukin 1 may explain the development of experimental cancer cachexia. For this purpose, C57BL/6J mice bearing a transplantable low differentiated rapidly growing tumor were passively immunized every other day with rab...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1991-01-01 00:00:00
abstract::We recently reported the isolation of the K-sam complementary DNA (cDNA), which was amplified preferentially in poorly differentiated types of stomach cancer and codes for one of the heparin-binding growth factor or fibroblast growth factor (FGF) receptor families. The K-sam-related gene, N-sam (NCC-IT-cell-derived sa...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1992-06-15 00:00:00
abstract::The process of myeloid differentiation in human promyelocytic leukemia cells (HL-60) is accompanied by the coordinate expression of numerous protooncogenes. To investigate the expression of transforming growth factor alpha (TGF-alpha) in myeloid differentiation, HL-60 cells were induced to differentiate into granulocy...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1993-01-01 00:00:00
abstract::Maximum rates of nitrofuran reduction by intact mammalian cells and homogenates of mouse liver are obtained under anaerobic conditions, although significant reduction does occur with gas mixtures containing 5% oxygen and less. Single-strand breaks in DNA, measured as a decrease in the sedimentation constant on alkalin...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1975-03-01 00:00:00
abstract::Highly glycolytic cervical cancers largely resist treatment by cisplatin and coadministered pelvic irradiation as the present standard of care. In this study, we investigated the effects of inhibiting glycolysis and thiol redox metabolism to evaluate them as alternate treatment strategies in these cancers. In a panel ...
journal_title:Cancer research
pub_type: 杂志文章
doi:10.1158/0008-5472.CAN-17-2367
更新日期:2018-03-15 00:00:00
abstract::Tumor antigen-induced inhibition of leukocyte adherence was adapted and modified for use in glass test tubes for the study of cell-mediated antitumor immunity to human adenocarcinoma of the breast. Peripheral blood leukocytes from 40 to 47 patients with proven breast cancer responded to an antigenic extract of breast ...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1975-09-01 00:00:00
abstract::The involvement of immune response in the resistance of chemically induced stomach cancer was studied in a resistant rat strain (Buffalo) and a sensitive rat strain (ACI). Groups of 10 male Buffalo and ACI rats, 6 weeks of age, were given drinking water with or without N-methyl-N'-nitro-N-nitrosoguanidine (MNNG; 100 m...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1998-09-15 00:00:00
abstract::gamma-Interferon (IFN-gamma) was shown to amplify cytotoxin release from murine bone marrow-adherent macrophages in response to an animal lectin as a second stimulus. This stimulation of cytotoxin release was demonstrated both in vitro and in vivo and was maximal 2 h after treatment with IFN-gamma. No change in expres...
journal_title:Cancer research
pub_type: 杂志文章
doi:
更新日期:1988-04-01 00:00:00