Abstract:
:Benzo(a)pyrene and benz(a) anthrancene which, in contrast to the K-region epoxides benzo(a)pyrene 4,5-oxide and benz(a)anthracene 5,6-oxide, are not mutagenic to Salmonella typhimurium TA 1537 in the absence of mammalian enzyme preparations, were activated by liver microsomes from C3H mice, which had not received any pretreatment, to mutagens reverting this tester strain to histidine prototrophy. Addition of epoxide hydratase inhibitors greatly increased this mutagenicity and addition of pure epoxide hydratase reduced it by more than 95% down to the range of spontaneous mutations as observed in absence of any added mutagen. This demonstrates than the metabolic pathway responsible for the mutagenicity of both polycyclic hydrocarbons observed in this system proceeds entirely via an epoxidation pathway and that the responsible metabolites are epoxides or species arising from them. Moreover, further metabolism by epoxide hydratase does not lead to produce contributing to the mutagenicity observed with the tester strain used. Finally, the epoxides relevant for the observed mutagenicity are substrates for epoxide hydratase; indeed, modest amounts of the pure enzyme can prevent the mutagenic effect.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Oesch F,Bentley P,Glatt HRdoi
10.1002/ijc.2910180408keywords:
subject
Has Abstractpub_date
1976-10-15 00:00:00pages
448-52issue
4eissn
0020-7136issn
1097-0215journal_volume
18pub_type
杂志文章abstract::Recombinant human (rhu) macrophage colony-stimulating factor (M-CSF) was evaluated for efficacy, either alone or in combination with local X-irradiation (LR), in mice inoculated subcutaneously (s.c.) with Lewis lung carcinoma (LLC) cells. The size of the primary tumor and numbers of lung metastases, 21 days after tumo...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910470125
更新日期:1991-01-02 00:00:00
abstract::To identify molecular markers for the progression of head-and-neck squamous cell carcinoma (HNSCC), we used RNA arbitrarily primed (RAP) PCR to determine the qualitative and quantitative differences in gene expression between normal epithelial cells, those derived from dysplastic oral mucosa and invasive and metastati...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.10403
更新日期:2002-06-01 00:00:00
abstract::The aim of our study was to analyze the alterations of some candidate tumor suppressor genes (TSGs) viz. LIMD1, LTF, CDC25A, SCOTIN, RASSF1A and CACNA2D2 located in the chromosomal region 3p21.31 associated with the development of early dysplastic lesions of head and neck. In analysis of 72 dysplastic lesions and 116 ...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.23834
更新日期:2008-12-01 00:00:00
abstract::The activity of systemic and in situ natural killer (NK) cells was measured in 3- to 5-week-old CBA mice with progressively growing murine sarcoma virus (MSV)-induced tumors. Splenic NK activity was depressed in tumor-bearing mice. NK activity was quite low or not detectable in unfractionated cell suspensions from the...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910270218
更新日期:1981-02-15 00:00:00
abstract::In previous studies we showed that human sarcoma and melanoma cell lines synthesize and secrete into culture medium a glycoprotein, migrating in urea sodium dodecyl sulfate-polyacrylamide gel electrophoresis at Mr 140,000. It is not detected in cultures of the corresponding normal cells. Conditioned medium of the mela...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910370114
更新日期:1986-01-15 00:00:00
abstract::We have used differential-display PCR (DD-PCR) to compare renal-cell carcinoma (RCC) and normal kidney gene expression with the aim of identifying genes specifically associated with RCC. Using a modified DD-PCR approach, which was non-radioactive, quicker and simpler than the conventional method, 24 cDNA samples were ...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/1097-0215(20001201)88:5<726::aid-ijc7>3.0.
更新日期:2000-12-01 00:00:00
abstract::Rabbits were immunized with extracts of primary or grafted intestinal adeno-carcinomas induced by carcinogenic drugs in inbred rats. After absorption with normal tissue extracts, the antisera were able to recognize three tumor-associated antigens. Two of them were glycoproteins, present in cancer cells but also, in tr...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910150117
更新日期:1975-01-15 00:00:00
abstract::Mouse-transformed keratinocytes cultured in the presence of transforming growth factor beta1 (TGF-beta1) acquire an array of morphologic and functional properties that give rise to a migratory phenotype that expresses mesenchymal molecular markers. This cellular conversion involves activation of the Ras-ERK pathway, e...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.11457
更新日期:2003-12-10 00:00:00
abstract::Meibomian gland carcinoma (MGC) and basal cell carcinoma (BCC) are common eyelid carcinomas that exhibit highly dissimilar degrees of proliferation and prognoses. We address here the question of the differential mechanisms between these two eyelid cancers that explain their different outcome. A total of 102 confirmed ...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.29882
更新日期:2016-03-15 00:00:00
abstract::Murine hepatocellular carcinoma cells were retrovirally transduced with the bacterial cytosine deaminase (CD) gene. CD-transduced cells exhibited more than 120-fold higher sensitivity to 5-fluorocytosine (5-FC) compared with parental cells. When syngeneic immunocompetent mice were inoculated s.c. with parental hepatoc...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/(sici)1097-0215(19990517)81:4<592::aid-ijc
更新日期:1999-05-17 00:00:00
abstract::Telomerase activity is involved in the maintenance of telomere length and is thought to be required for cellular immortality and oncogenesis. Three major subunits composing telomerase, human telomerase RNA (hTR), telomerase-associated protein (TPI) and human telomerase catalytic subunit (hTERT), have been identified. ...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/(sici)1097-0215(19990315)80:6<804::aid-ijc
更新日期:1999-03-15 00:00:00
abstract::Inactivation of the tumor suppressor gene, von Hippel-Lindau (VHL), is known to play an important role in the development of sporadic clear cell renal cell carcinomas (ccRCCs). Even if available targeted therapies for metastatic RCCs (mRCCs) have helped to improve progression-free survival rates, they have no durable ...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.30774
更新日期:2017-08-15 00:00:00
abstract::Vitamin D is well known for its important role in calcium and phosphor homeostasis. Recent research suggests that vitamin D also prevent some type of cancers. We studied solar vitamin D effective UV radiation (VD dose), dietary vitamin D, sun-seeking holidays, use of solarium, frequency of sunburn and breast cancer ri...
journal_title:International journal of cancer
pub_type: 杂志文章,随机对照试验
doi:10.1002/ijc.25463
更新日期:2011-03-15 00:00:00
abstract::The colo-rectum and stomach are the 2 sites for which the role of diet in the etiology of cancer is most heavily implicated. Quantitative estimates as to the proportion of cancer deaths attributable to diet vary considerably. This may be partially due to the application of the concept of population attributable risk w...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910400509
更新日期:1987-11-15 00:00:00
abstract::Several mouse models studying the MLL fusion-induced leukemic transformation showed that a myeloproliferation stage precedes leukemia or occurred as the only phenotype of hematological disorder in mice. We established 6 MLL/AF10(OM-LZ)-immortalized cell lines by retrovirally transducing the fusion gene into bone marro...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.24867
更新日期:2010-04-01 00:00:00
abstract::Some ovarian cancer cells in vivo are in a reversible quiescent state where they can contribute to cancer spread under favorable growth conditions. The serine/threonine kinase Mirk/dyrk1B was expressed in each of seven ovarian cancer cell lines and in 21 of 28 resected human ovarian cancers, and upregulated in 60% of ...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.25692
更新日期:2011-07-15 00:00:00
abstract::Studies with purified DT-diaphorase have shown that the enzyme is capable of catalyzing a two-electron reduction of the novel indoloquinone EO9 to a DNA-damaging alkylating species. The aim of this study was to determine to what extent DT-diaphorase may be involved in the metabolic activation of EO9 and mitomycin C in...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910560124
更新日期:1994-01-02 00:00:00
abstract::Malignant mesothelioma (MM) is a highly aggressive form of cancer with limited treatment options. Although the role of NK cells has been studied in many solid tumors, the pattern of NK-cell subsets and their recognition of mesothelioma cells remain to be explored. We used RNA expression data of MM biopsies derived fro...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.32363
更新日期:2019-10-15 00:00:00
abstract::Occupational data from 5 case-control studies in the United States involving 2,973 male cases and 3,210 controls were analyzed to estimate the percentage of lung cancer attributable to well-known and suspected lung carcinogens. The studies were conducted in areas heterogeneous in terms of industrial activities. The pe...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910420610
更新日期:1988-12-15 00:00:00
abstract::The karyotypes of cells from 10 Burkitt lymphoma (BL) biopsies, eight cell lines established from BL and nine cell lines from non-BL sources were studied by chromosome banding techniques. With the exception of the BL-derived cell lines BJAB, GC-BJAB, Maku and U-8691 all biopsies and lines of Burkitt origin contained a...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910170108
更新日期:1976-01-15 00:00:00
abstract::It is well known that tumors arising from tissues such as kidney, pancreas, liver and stomach are particularly refractory to treatment. Searching for new anticancer drugs using cells in culture has yielded some effective therapies, but these refractory tumors remain intractable. Studies that compare cells grown in sus...
journal_title:International journal of cancer
pub_type: 杂志文章,评审
doi:10.1002/ijc.20671
更新日期:2005-03-01 00:00:00
abstract::Lymphatic leukemia developed in C57BL/6 mice following inoculation of normal thymocytes that and been co-cultured on leukemic thymus epithelial reticulum monolayer cells. Using thymocytes genetically marked in Ly membrane antigens, we showed that the thymomas which developed were produced by the co-cultured thymocytes...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910210119
更新日期:1978-01-15 00:00:00
abstract::Elevated platelet counts in patients diagnosed with malignant tumors were first described more than 100 years ago. Today it is well known that in many types of solid tumors, thrombocytosis at the time of diagnosis is associated with shorter survival. From this well-documented clinical correlation between platelet coun...
journal_title:International journal of cancer
pub_type: 杂志文章,评审
doi:10.1002/ijc.27441
更新日期:2012-06-15 00:00:00
abstract::Although sunburn and intermittent sun exposures are associated with increased melanoma risk, most studies have found null or inverse associations between occupational (more continuous pattern) sun exposure and melanoma risk. The association of melanoma with occupational sun exposure may differ according to anatomical ...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.28603
更新日期:2014-06-01 00:00:00
abstract::Sprague-Dawley rats were given combinations of aminopyrine or oxytetracycline and sodium nitrite in drinking water. Of 30 animals receiving 0.1% (1,000 ppm) of aminopyrine and sodium nitrite for 30 weeks, 29 died with hemangioendothelial sarcomas of the liver. The same tumor caused death in 26 of 30 animals that recei...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910160203
更新日期:1975-08-15 00:00:00
abstract::Although viral sequences closely related to feline leukaemia virus are represented in multiple copies in cellular DNA of all domestic cats, a specific fraction was present only in the virus-infected cells. This fraction was detected by viral cDNA enriched by a prior absorption of a total complementary DNA (cDNA) trans...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.2910220114
更新日期:1978-07-15 00:00:00
abstract::Randomized clinical trials have shown that use of 5α-reductase inhibitors (5-ARIs) lowers overall prostate cancer (PCa) risk compared to placebo, while the proportion of Gleason 8-10 tumors is elevated. It is unknown whether this affects PCa-specific survival. We studied disease-specific survival by 5-ARI usage in a c...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.30017
更新日期:2016-06-15 00:00:00
abstract::Overuse of antibiotic drugs alters the composition of gut microbiota and has detrimental effects on the host. In our study, we investigated association of gut flora and antibiotics in the prognosis of patients with liver cancer who have undergone chemotherapy by analyzing two independent clinical studies. We retrospec...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.32339
更新日期:2019-11-15 00:00:00
abstract::The paired-like homeodomain transcription factor 2 (PITX2), a downstream effector of wnt/β-catenin signaling, is well known to play critical role during normal embryonic development. However, the possible involvement of PITX2 in human tumorigenesis remains unclear. In this study, we extend its function in human esopha...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/ijc.27930
更新日期:2013-06-01 00:00:00
abstract::Hereditary non-polyposis colorectal cancer, HNPCC, is an autosomal dominant condition predisposing to cancers of primarily the colorectum and the endometrium. The aim of our study was to identify persons at a high risk of hereditary colorectal cancer and to estimate their risk of colon and other HNPCC-associated tumou...
journal_title:International journal of cancer
pub_type: 杂志文章
doi:10.1002/1097-0215(200002)9999:9999<::aid-ijc1093>3
更新日期:2001-02-15 00:00:00