Initiation of enzyme-altered foci by the synthetic steroid cyproterone acetate in rat liver foci bioassay.

abstract：:Nitric oxide (NO) has been shown to induce double strand DNA breaks in Barrett's oesophagus (BO) and in other cancers has a role in invasion. The specific aims of this study were to investigate whether NO can induce invasion in cells representative of different stages of Barrett's progression and to determine possible...

journal_title：Carcinogenesis

authors： Clemons NJ,Shannon NB,Abeyratne LR,Walker CE,Saadi A,O'Donovan ML,Lao-Sirieix PP,Fitzgerald RC

更新日期：2010-09-01 00:00:00

abstract：:Previous studies demonstrate that the heavy metal cadmium and the metalloid arsenite activate estrogen receptor-alpha in breast cancer cells by forming a high-affinity complex with the ligand-binding domain of the receptor and that environmentally relevant doses of cadmium have estrogen-like activity in vivo. The pres...

journal_title：Carcinogenesis

authors： Divekar SD,Li HH,Parodi DA,Ghafouri TB,Chen R,Cyrus K,Foxworth AE,Fornace AJ,Byrne C,Martin MB

更新日期：2020-07-14 00:00:00

abstract：:Although microRNAs (miRNA) have extensively been investigated in cancer research, less attention has been paid to their regulation by carcinogens and/or protective factors in early stages of the carcinogenesis process. The present study was designed to evaluate the modulation of mRNA expression as related to exposure ...

journal_title：Carcinogenesis

authors： Izzotti A,Larghero P,Cartiglia C,Longobardi M,Pfeffer U,Steele VE,De Flora S

更新日期：2010-05-01 00:00:00

abstract：:Tumor induction with chronic feeding of methyl-donor-deficient diets has been well established; however, the biochemical and molecular mechanisms which predipose to tumorigenesis in this model are still not well understood. The purpose of the present investigation was to assess DNA damage and altered nucleotide metabo...

journal_title：Carcinogenesis

authors： James SJ,Yin L

更新日期：1989-07-01 00:00:00

abstract：:Salvia miltiorrhiza (SM) has been used clinically in Asian countries to improve the microcirculation in the human body. Salvianolic acid B (Sal B), a pure compound extracted from SM, has been reported to be effective against fibrosis and ischemia-reperfusion injury, possibly through its anti-lipid peroxidation action....

journal_title：Carcinogenesis

authors： Zhou ZT,Yang Y,Ge JP

更新日期：2006-04-01 00:00:00

abstract：:The ability of sodium bisulfite to induce morphological transformation and mutagenesis of cultured Syrian hamster embryo cells was examined. Treatment of the cells at neutral pH for 15 min with 5-20 mM sodium bisulfite resulted in a dose-dependent increase in cell transformation but no induction of gene mutations meas...

journal_title：Carcinogenesis

authors： Tsutsui T,Barrett JC

更新日期：1990-10-01 00:00:00

abstract：:Hepatocellular carcinoma (HCC) is one of the leading causes for cancer related mortality worldwide. Poor prognosis of HCC patients is mainly due to frequent metastasis and recurrence. Deregulation of metastasis suppressors in malignant cells plays critical roles during cancer metastasis. Thus, novel metastasis suppres...

journal_title：Carcinogenesis

authors： Luo Q,Wang C,Jin G,Gu D,Wang N,Song J,Jin H,Hu F,Zhang Y,Ge T,Huo X,Chu W,Shu H,Fang J,Yao M,Gu J,Cong W,Qin W

更新日期：2015-10-01 00:00:00

abstract：:Animal studies demonstrated that females are more susceptible than males to benzo[a]pyrene (BaP)-induced toxicities, including lung carcinogenesis. Elevation of cyclooxygenase-2 (COX-2) expression has been shown to increase the risk of cancer development. BaP induces COX-2 expression, and an interaction between BaP an...

journal_title：Carcinogenesis

authors： Chang LW,Chang YC,Ho CC,Tsai MH,Lin P

更新日期：2007-07-01 00:00:00

abstract：:Transforming growth factor-beta 1 (TGF-beta1) plays a significant role in regulating the proliferation and apoptosis of prostate epithelial and stromal cells. We explored the association between the T (Leu) to C (Pro) polymorphism at codon10 of the TGF-beta1 gene (TGFB1) and the risk of prostate cancer (PCa) or benign...

journal_title：Carcinogenesis

authors： Li Z,Habuchi T,Tsuchiya N,Mitsumori K,Wang L,Ohyama C,Sato K,Kamoto T,Ogawa O,Kato T

更新日期：2004-02-01 00:00:00

abstract：:Current procedures for diagnosis and biomarker examination of colorectal cancer (CRC) are invasive and unpleasant. There is a great need to identify sensitive and specific biomarkers for early diagnosis of CRC. Circulating microRNAs (miRNAs) are promising molecular markers for CRC prediction. We performed a comprehens...

journal_title：Carcinogenesis

authors： Du M,Liu S,Gu D,Wang Q,Zhu L,Kang M,Shi D,Chu H,Tong N,Chen J,Adams TS,Zhang Z,Wang M

更新日期：2014-12-01 00:00:00

abstract：:Telomeres are critical in maintaining chromosome and genomic stability. Arsenic, a human carcinogen as well as an anticancer agent, is known for its clastogenicity. To better understand molecular mechanisms of arsenic actions, we investigated arsenite effects on telomere and telomerase and determined cell growth and a...

journal_title：Carcinogenesis

authors： Zhang TC,Schmitt MT,Mumford JL

更新日期：2003-11-01 00:00:00

abstract：:Ouabain resistance (ouar) and 6-thioguanine resistance (6-TGr) mutation frequencies were measured in Chinese hamster ovary cells after treatment with N-ethyl-N-nitrosourea (ENU) for varying periods of time. Maximal mutation frequency at the Na+/K+ ATPase gene locus (ouar mutations) was attained within 5 min of exposur...

journal_title：Carcinogenesis

authors： Dogliotti E,Vitelli A,Terlizzese M,Di Muccio A,Calcagnile A,Saffiotti U,Bignami M

更新日期：1987-01-01 00:00:00

abstract：:The possibility that ascorbic acid, as a nucleophile, may inhibit mutagenicity induced by electrophilic metabolites of N-nitroso compounds was examined. In vitro data are presented to show that ascorbic acid does not decrease the mutagenicity of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) in a modified Ames bacterial ...

journal_title：Carcinogenesis

authors： Norkus EP,Kuenzig WA

更新日期：1985-11-01 00:00:00

abstract：:Base excision repair (BER) and nucleotide excision repair (NER) pathways repair damaged DNA, and polymorphisms in these genes might affect breast cancer susceptibility. We evaluated associations between seven single-nucleotide polymorphisms in four DNA repair genes (ERCC4 rs1799801, XPC rs2227998, rs2228001, rs2228000...

journal_title：Carcinogenesis

authors： Roberts MR,Shields PG,Ambrosone CB,Nie J,Marian C,Krishnan SS,Goerlitz DS,Modali R,Seddon M,Lehman T,Amend KL,Trevisan M,Edge SB,Freudenheim JL

更新日期：2011-08-01 00:00:00

abstract：:The purpose of this work was to study the relative activities and stabilities of phase-I and phase-II drug metabolizing enzymes in incubation mixtures used in vitro genotoxicity testing in order to optimize the conditions of the assay, increase sensitivity and eliminate false negative results. Cytochrome P-450, NADPH-...

journal_title：Carcinogenesis

authors： Paolini M,Tonelli F,Bauer C,Corsi C,Bronzetti G

更新日期：1987-09-01 00:00:00

abstract：:A series of cells representing normal, non-tumorigenic cell lines, as well as differentiating neoplastic and undifferentiated neoplastic rat tracheal epithelial cell populations were evaluated for their ability to establish homologous and/or heterologous cell-cell gap junction communication in culture. Gap junction co...

journal_title：Carcinogenesis

authors： Terzaghi-Howe M,Chang GW,Popp D

更新日期：1997-11-01 00:00:00

abstract：:Oxidative stress has consistently been linked to breast carcinogenesis, and mitochondria play a significant role in regulating reactive oxygen species generation. In our previous study, we found that increased levels of mitochondrial DNA (mtDNA) copy number and the presence of mitochondrial length heteroplasmies in th...

journal_title：Carcinogenesis

authors： Shen J,Wan J,Song R,Zhao H

更新日期：2015-11-01 00:00:00

abstract：:A reduction in the ratio of tetraploid to diploid liver nuclei has been investigated as an early indicator of hepatocarcinogenesis in the rat using the liver carcinogen 3'-methyl-4-dimethylaminoazobenzene (3'M). In a dose ranging study 3'M was administered by gavage to rats at 5, 12.5 and 25 mg/kg for up to 10 weeks a...

journal_title：Carcinogenesis

authors： Styles J,Elliott BM,Lefevre PA,Robinson M,Pritchard N,Hart D,Ashby J

更新日期：1985-01-01 00:00:00

abstract：:Desmosomes are intercellular junctions that confer strong cell-cell adhesion. Altered expression of desmocollin 3 (DSC3), a member of the desmosomal cadherin family, was found in various cancers; however, its functional involvement in carcinogenesis has not yet been elucidated. Expression/localization of DSC3 was anal...

journal_title：Carcinogenesis

authors： Cui T,Chen Y,Yang L,Knösel T,Huber O,Pacyna-Gengelbach M,Petersen I

更新日期：2012-12-01 00:00:00

abstract：:In a previous study a high first-pass metabolism of N-nitrosodi-[1-14C]amylamine (NDAA, 0.59-350 microM) has been shown in isolated perfused rat small intestinal segments. In the present work the identification of metabolites in samples of perfusate and absorbed fluid (absorbate) is reported. After HPLC enrichment and...

journal_title：Carcinogenesis

authors： Richter E,Lorck C,Wiessler M

更新日期：1988-03-01 00:00:00

abstract：:Functional activation of beta-catenin/Tcf signaling plays an important role in the early events in colorectal carcinogenesis. We examined the effect of ionomycin against beta-catenin/Tcf signaling in colon cancer cells. Reporter gene assay showed that ionomycin inhibited beta-catenin/Tcf signaling efficiently. In addi...

journal_title：Carcinogenesis

authors： Park CH,Hahm ER,Lee JH,Jung KC,Rhee HS,Yang CH

更新日期：2005-11-01 00:00:00

abstract：:Hepatic microsomes of female F344 rats were capable of N,O-acyltransfer of N-hydroxy-N-acetyl-2-aminofluorene (N-OH-AAF) and N-hydroxy-N-formyl-2-aminofluorene (N-OH-FAF), N-deacetylation of N-OH-AAF and N-acetyl-2-aminofluorene (2-AAF), and O-deacetylation of 4-nitrophenyl acetate (NPA). The activity for N,O-acyltran...

journal_title：Carcinogenesis

authors： Wang CY,Zukowski K,Lee MS,Sone T

更新日期：1992-11-01 00:00:00

abstract：:The 32P-postlabeling method has been adapted for the analysis of thymidine-cis-glycol-3'-phosphate (cis-dTGp,cis-5,6-dihydroxy-5,6-dihydrothymidine-3'-phosphat e). Cis-dTGp was isolated and purified from normal nucleotides by phenylboronate affinity chromatography and phosphorylated by T4 polynucleotide kinase in pres...

journal_title：Carcinogenesis

authors： Hegi ME,Sagelsdorff P,Lutz WK

更新日期：1989-01-01 00:00:00

abstract：:Chrysoidine dyes are used by fishermen to colour bait and recent epidemiological evidence has suggested that this may explain why they are at increased risk of urothelial cancer. In recent years Bismark brown dyes have been used as chrysoidine substitutes. Previous mutagenicity studies on these azo-dyes have examined ...

journal_title：Carcinogenesis

authors： Sole GM,Chipman JK

更新日期：1986-11-01 00:00:00

abstract：:DNA strand breage in response to damage produced by UV (254 nm) radiation was characterized after permeabilization of diploid normal and xeroderma pigmentosum variant fibroblasts. The breakage reaction required ATP, Mg2+ and sucrose for maximal activity and was inhibited by 150 mM Na+ or K+ and 1 mM N-ethylmaleimide. ...

journal_title：Carcinogenesis

authors： Kaufmann WK,Briley LP

更新日期：1990-01-01 00:00:00

abstract：:The metabolism of zymosterol and mevalonic acid was studied in vitro using the skin homogenates of 3-methylcholanthrene (3MC), diazacholesterol-treated and untreated mice. In normal mouse skin only lathosterol was a major metabolite and the other metabolites, cholesta-5,7,24-trien-3 beta-ol, desmosterol, cholesterol a...

journal_title：Carcinogenesis

authors： Tanimoto Y,Fukao K,Yoshiga K,Takada K,Ohyama Y,Okuda K

更新日期：1990-09-01 00:00:00

abstract：:Treatment of pregnant mice with 3-methylcholanthrene (MC) causes lung and liver tumors in the offspring, the incidences of which are greatly influenced by the Ah locus regulated induction phenotype for aryl hydrocarbon hydroxylase activity (AHH) in both the mother and fetuses. In order to examine the biochemical and m...

journal_title：Carcinogenesis

authors： Miller MS,Jones AB,Chauhan DP,Anderson LM

更新日期：1990-11-01 00:00:00

abstract：:Dibenzo[a,l]pyrene (DB[a,l]P) is an extremely potent carcinogen that may be present in environmental samples. Dose-response studies were conducted at low doses in mouse skin by initiation-promotion and repeated application to compare its activity to that of 7,12-dimethylbenz[a]anthracene (DMBA), benzo[a]pyrene (B[a]P)...

journal_title：Carcinogenesis

authors： Higginbotham S,RamaKrishna NV,Johansson SL,Rogan EG,Cavalieri EL

更新日期：1993-05-01 00:00:00

abstract：:Debrisoquine hydroxylase activity has been attributed to CYP2D6 and poor metabolizers of debrisoquine have a reduced relative risk of developing aggressive bladder cancer. Production of a proximate carcinogen could occur in liver or bladder mucosa. However, it is not known if CYP2D6 is expressed in human bladder mucos...

journal_title：Carcinogenesis

authors： Romkes-Sparks M,Mnuskin A,Chern HD,Persad R,Fleming C,Sibley GN,Smith P,Wilkinson GR,Branch RA

更新日期：1994-09-01 00:00:00

abstract：:The JB6 mouse epidermal cell system has been extensively used as an in vitro model for the study of tumor promotion. The present study aimed to assess the relevance of monolayer measurements to the process of transformation, which is induced more efficiently under anchorage-independent (AI) conditions. Although it wou...

journal_title：Carcinogenesis

authors： Dong Z,Cmarik JL,Wendel EJ,Colburn NH

更新日期：1994-05-01 00:00:00