Mutational specificity of 2-amino-3-methylimidazo-[4,5-f]quinoline in the hprt locus of CHO-K1 cells.

Abstract:

:2-Amino-3-methylimidazo[4,5-f]quinoline (IQ), a food carcinogen formed in cooked meats, can induce gene mutation at the hprt locus of CHO-K1 cells in the presence of hepatic S9 mix. To elucidate the molecular nature of IQ-induced mutation, we characterized the entire coding region of the hypoxanthine phosphoribosyl-transferase gene of 23 independent mutants derived from IQ-treated CHO cells by direct sequencing of polymerase chain reaction-amplified cDNA. Ten of the 23 IQ-induced mutants examined contained single base substitutions; one mutant had three single-base substitutions. Among the base substitutions, G.C-->C.G (six of 13) and A.T-->C.G (three of 13) transversions predominated. Most of the base-substitution mutations occurred preferentially at a middle G and had a dA in their 3' ends. Of the 13 other mutations (56.5%), 12 missing one or more complete exons were splice-site mutations, and one mutant had a partial deletion of an exon. A high frequency of complete exon deletion (11 of 12) in exons 2-5 was observed. Interestingly, 75% of the mutants (nine of 12) with splice-site mutations were induced by IQ only at higher concentrations (300-500 microM). This was probably due to the occurrence of GC base-substitution mutations that affected hprt mRNA splicing, especially at the intron-exon boundaries.

journal_name

Mol Carcinog

journal_title

Molecular carcinogenesis

authors

Lee H,Shih MK

doi

10.1002/mc.2940130209

subject

Has Abstract

pub_date

1995-06-01 00:00:00

pages

122-7

issue

2

eissn

0899-1987

issn

1098-2744

journal_volume

13

pub_type

杂志文章
  • Characterization of DNA-protein complexes induced in intact cells by the carcinogen chromate.

    abstract::Potassium chromate induced the formation of DNA-protein complexes in cultured Chinese hamster ovary cells. The DNA-protein complexes were isolated by ultracentrifugal sedimentation in the presence of 2% sodium dodecyl sulfate (SDS) and 5 M urea. Two-dimensional SDS-polyacrylamide gel electrophoresis analysis of the ch...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.2940010208

    authors: Miller CA 3rd,Costa M

    更新日期:1988-01-01 00:00:00

  • The enhancing effects of obesity on mammary tumor growth and Akt/mTOR pathway activation persist after weight loss and are reversed by RAD001.

    abstract::The prevalence of obesity, an established risk and progression factor for postmenopausal breast cancer, remains high in US women. Activation of Akt/mammalian target of rapamycin (mTOR) signaling plays a key role in the obesity-breast cancer link. However, the impact of weight normalization in obese postmenopausal wome...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.21878

    authors: De Angel RE,Conti CJ,Wheatley KE,Brenner AJ,Otto G,Degraffenried LA,Hursting SD

    更新日期:2013-06-01 00:00:00

  • BRCA1 and acetyl-CoA carboxylase: the metabolic syndrome of breast cancer.

    abstract::Breast cancer-associated mutations affecting the highly-conserved C-terminal BRCT domains of the tumor suppressor gene breast cancer susceptibility gene 1 (BRCA1) fully disrupt the ability of BRCA1 to interact with acetyl coenzyme A carboxylase alpha (ACCA), the rate-limiting enzyme catalyzing de novo fatty acid bioge...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.20364

    authors: Brunet J,Vazquez-Martin A,Colomer R,Graña-Suarez B,Martin-Castillo B,Menendez JA

    更新日期:2008-02-01 00:00:00

  • A novel tumor suppressor gene RhoBTB2 (DBC2): frequent loss of expression in sporadic breast cancer.

    abstract::RhoBTB2 was isolated recently as a tumor suppressor gene from human chromosome 8p21.3. Although RhoBTB2 was found to be frequently lost in breast cancer lines, expression status of RhoBTB2 in sporadic breast cancer tissues and its clinical and prognostic value, however, remain unclear. Tissue samples from breast cance...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.20598

    authors: Mao H,Qu X,Yang Y,Zuo W,Bi Y,Zhou C,Yin H,Deng B,Sun J,Zhang L

    更新日期:2010-03-01 00:00:00

  • Targeted disruption of Bcl-xL in mouse keratinocytes inhibits both UVB- and chemically induced skin carcinogenesis.

    abstract::Bcl-x(L) is one of several antiapoptotic proteins regulated by signal transducer and activator of transcription 3 (Stat3). We have recently shown that Stat3 is required for chemically induced and ultraviolet B (UVB)-induced skin carcinogenesis. In this study, the functional role of Bcl-x(L) in skin carcinogenesis was ...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.20527

    authors: Kim DJ,Kataoka K,Sano S,Connolly K,Kiguchi K,DiGiovanni J

    更新日期:2009-10-01 00:00:00

  • Role of IKK and oscillatory NFkappaB kinetics in MMP-9 gene expression and chemoresistance to 5-fluorouracil in RKO colorectal cancer cells.

    abstract::Nuclear factor kappa B (NFkappaB) is a central participant in the metastasis and chemoresistance of colorectal cancer (CRC). However, it is not fully understood to what extent NFkappaB contributes to induction of the metastasis-associated matrix metalloprotease-9 (MMP-9) gene and sensitivity to the commonly used chemo...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.20288

    authors: Fukuyama R,Ng KP,Cicek M,Kelleher C,Niculaita R,Casey G,Sizemore N

    更新日期:2007-05-01 00:00:00

  • Susceptibility of transgenic mice carrying human prototype c-Ha-ras gene in a short-term carcinogenicity study of vinyl carbamate and ras gene analyses of the induced tumors.

    abstract::To determine if hemizygous transgenic mice carrying the human c-Ha-ras gene (CB6F1-Tg Hras2 mice (Hras2 mice)) are susceptible to the carcinogenic potential of known murine carcinogens, male and female Hras2 mice and their non-transgenic CB6F1 littermates (non-Tg mice) were each given a single intraperitoneal injectio...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/(sici)1098-2744(199711)20:3<298::aid-mc6>3

    authors: Mitsumori K,Wakana S,Yamamoto S,Kodama Y,Yasuhara K,Nomura T,Hayashi Y,Maronpot RR

    更新日期:1997-11-01 00:00:00

  • Transforming growth factor-beta responsiveness in DPC4/SMAD4-null cancer cells.

    abstract::DPC4/SMAD4 is a candidate tumor suppressor gene with a strikingly high frequency of gene alterations in pancreatic cancer that suggests a discrete role for DPC4 in these tumors. DPC4 tumor-suppressive function has been implicated to mediate the transforming growth factor-beta (TGFbeta)-suppressive pathway; however, in...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/(sici)1098-2744(199909)26:1<37::aid-mc5>3.

    authors: Dai JL,Schutte M,Bansal RK,Wilentz RE,Sugar AY,Kern SE

    更新日期:1999-09-01 00:00:00

  • EGFR-mediated Akt and MAPKs signal pathways play a crucial role in patulin-induced cell proliferation in primary murine keratinocytes via modulation of Cyclin D1 and COX-2 expression.

    abstract::Patulin (PAT), a present day major contaminant of commercial apple and apple products is reported to be carcinogenic, embryotoxic, and immunotoxic. While oral and inhalation are considered to be the most prevalent routes of exposure to this toxin, exposure through skin is now being extensively investigated. Our previo...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.22060

    authors: Alam S,Pal A,Kumar R,Dwivedi PD,Das M,Ansari KM

    更新日期:2014-12-01 00:00:00

  • p28(GANK) associates with p300 to attenuate the acetylation of RelA.

    abstract::Oncoprotein p28(GANK), overexpressed in hepatocellular carcinomas (HCC), binds to RelA and retains NF-κB in the cytoplasm to suppress NF-κB transactivation. However, the mechanism has not yet been elucidated. In this study, we clarified the mechanism of NF-κB regulated by p28(GANK). p28(GANK) reduced TNF-α-induced nuc...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.22235

    authors: Ren YB,Luo T,Li J,Fu J,Wang Q,Cao GW,Chen Y,Wang HY

    更新日期:2015-12-01 00:00:00

  • Phenotypic characteristics of mouse lung adenoma induced by 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone.

    abstract::The expression profile of adenoma induced by 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in A/J mice was compared with that of normal lung tissue by suppression subtractive hybridization (SSH). The mRNAs of surfactant-associated protein A (SP-A) and lysozyme showed characteristically higher transcription in t...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.20070

    authors: Okubo C,Morishita Y,Minami Y,Ishiyama T,Kano J,Iijima T,Noguchi M

    更新日期:2005-02-01 00:00:00

  • Chemopreventive effect of Korean Angelica root extract on TRAMP carcinogenesis and integrative "omic" profiling of affected neuroendocrine carcinomas.

    abstract::Angelica gigas Nakai (AGN) root ethanol extract exerts anti-cancer activity in several allograft and xenograft models. Here we examined its chemopreventive efficacy through gavage administration against primary carcinogenesis in the transgenic adenocarcinoma of mouse prostate (TRAMP) model. Male C57BL/6 TRAMP mice and...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.22230

    authors: Zhang J,Wang L,Zhang Y,Li L,Tang S,Xing C,Kim SH,Jiang C,Lü J

    更新日期:2015-12-01 00:00:00

  • Differences in ornithine decarboxylase and androgen receptor allele frequencies among ethnic groups.

    abstract::Recent evidence suggests that the A allele of the ornithine decarboxylase (ODC) gene is a genetic risk factor for prostate cancer. ODC is a target gene of the highly polymorphic androgen receptor (AR) gene, short alleles of which have been associated in some studies with increased prostate cancer risk. We determined O...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.20047

    authors: O'Brien TG,Guo Y,Visvanathan K,Sciulli J,McLaine M,Helzlsouer KJ,Watkins-Bruner D

    更新日期:2004-10-01 00:00:00

  • A human endonuclease incises ultraviolet-irradiated DNA at cytosines and oxidized DNA at thymines.

    abstract::Both ultraviolet irradiation and oxidation of DNA produce a variety of pyrimidine base damages. A human endonuclease recognizes such altered bases on these DNA substrates. This human endonuclease incises ultraviolet-irradiated DNA exclusively at sites of photochemically modified cytosines. The precise sites of incisio...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.2940020404

    authors: Gallagher PE,Weiss RB,Brent TP,Duker NJ

    更新日期:1989-01-01 00:00:00

  • Cotransfection of plasmids with ras and myc oncogenes to diploid cells derived from rodent fetuses: alteration of neoplastic transformation frequency depending on the gestation period.

    abstract::To analyze the mechanism of neoplastic transformation of rodent diploid cells by ras and myc oncogenes, human EJ c-Ha-ras and mouse c-myc second and third exons promoted by SV40 promoter were connected to pSV2neo and pSV2gpt, respectively. Mouse and rat primary fetal cells cotransfected with both genes formed transfor...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.2940010404

    authors: Yagi T,Sasayama S,Sasai H,Kakunaga T

    更新日期:1989-01-01 00:00:00

  • Metabolic symbiosis in cancer: refocusing the Warburg lens.

    abstract::Using relatively primitive tools in the 1920s, Otto Warburg demonstrated that tumor cells show an increased dependence on glycolysis to meet their energy needs, regardless of whether they were well-oxygenated or not. High rates of glucose uptake, fueling glycolysis, are now used clinically to identify cancer cells. Ho...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章,评审

    doi:10.1002/mc.21863

    authors: Nakajima EC,Van Houten B

    更新日期:2013-05-01 00:00:00

  • Pre-existing Fas ligand (FasL) in cancer cells elicits tumor-specific protective immunity, but delayed induction of FasL expression after inoculation facilitates tumor formation.

    abstract::Overexpression of Fas ligand (FasL) in cancer cells elicits potential antitumor effects via recruitment of neutrophils. Conversely, FasL-expressing tumors may counterattack tumor-infiltrating lymphocytes by delivering apoptotic death signals via Fas/FasL interactions, which may lead to tumor escape. In order to distin...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.21909

    authors: Chiu HY,Sun GH,Chen SY,Wang HH,Ho MY,Chu CY,Wu WL,Jhou RS,Tsai YL,Huang RT,Sun KH,Tang SJ

    更新日期:2013-09-01 00:00:00

  • Cinnamon extract reduces VEGF expression via suppressing HIF-1α gene expression and inhibits tumor growth in mice.

    abstract::Although many anti-VEGF agents are available for cancer treatment, side effects of these agents limit their application for cancer treatment and prevention. Here we studied the potential use of a diet-based agent as an inhibitor for VEGF production. Using a VEGF reporter assay, our data showed that an extract from cin...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.22506

    authors: Zhang K,Han ES,Dellinger TH,Lu J,Nam S,Anderson RA,Yim JH,Wen W

    更新日期:2017-02-01 00:00:00

  • Association of expression quantitative trait loci for long noncoding RNAs with lung cancer risk in Asians.

    abstract::Identification of long noncoding RNA (lncRNA) expression quantitative trait loci (lncR-eQTL) that associated with lung cancer can provide insights into regulatory mechanisms of lncRNA, and help reveal the role of lncRNA in lung cancer. A two-stage case-control design was implemented in this study. We first selected th...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.23013

    authors: Sun Q,Wang Y,Fan J,Li Z,Zhang J,Wang L,Fan X,Ji M,Zhu M,Dai J,Ma H,Jin G,Hu Z,Shen H

    更新日期:2019-07-01 00:00:00

  • Protein interactions of FAM134B with EB1 and APC/beta-catenin in vitro in colon carcinoma.

    abstract::FAM134B is an autophagy regulator of endoplasmic reticulum and acts as a cancer suppressor in colon cancer. However, the molecular signaling pathways by which FAM134B interacts within colon carcinogenesis is still unknown. Herein, this study aims to determine the interacting partners of FAM134B for the first time in c...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.22871

    authors: Islam F,Chaousis S,Wahab R,Gopalan V,Lam AK

    更新日期:2018-11-01 00:00:00

  • Models for chromosomal replication-independent non-B DNA structure-induced genetic instability.

    abstract::Regions of genomic DNA containing repetitive nucleotide sequences can adopt a number of different structures in addition to the canonical B-DNA form: many of these non-B DNA structures are causative factors in genetic instability and human disease. Although chromosomal DNA replication through such repetitive sequences...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章,评审

    doi:10.1002/mc.20508

    authors: Wang G,Vasquez KM

    更新日期:2009-04-01 00:00:00

  • A functional polymorphism C-1310G in the promoter region of Ku70/XRCC6 is associated with risk of renal cell carcinoma.

    abstract::The DNA repair gene Ku70 plays a key role in the DNA double strand break (DSB) repair system. Defects in DSB repair capacity can lead to genomic instability. We hypothesized that the Ku70 C-1310G polymorphism (rs2267437) was associated with risk of renal cell carcinoma (RCC). We genotyped the Ku70 C-1310G polymorphism...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.21914

    authors: Wang W,Pan X,Huo X,Yan F,Wang M,Wang D,Gao Y,Cao Q,Luo D,Qin C,Yin C,Zhang Z

    更新日期:2012-10-01 00:00:00

  • Transcriptional upregulation of MT2-MMP in response to hypoxia is promoted by HIF-1α in cancer cells.

    abstract::Hypoxia is a critical event in solid tumor development, invasion, and metastasis. Cellular adaptation to hypoxic microenvironment is essential for tumor progression and is largely mediated by hypoxia-inducible factor-1α (HIF-1α) through coordinated regulation of hypoxia-responsive genes. In this study, we found that m...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.20678

    authors: Zhu S,Zhou Y,Wang L,Zhang J,Wu H,Xiong J,Zhang J,Tian Y,Wang C,Wu H

    更新日期:2011-10-01 00:00:00

  • Silencing of UAP1L1 inhibits proliferation and induces apoptosis in esophageal squamous cell carcinoma.

    abstract::Esophageal squamous cell carcinoma (ESCC) is recognized as one of the malignant tumors with poor prognosis. UAP1L1 (UDP-N-acetylglucosamine-1-like-1) affects numerous biological processes, which is a key regulator of the development of malignant tumors. The biological function and molecular mechanism of UAP1L1 in ESCC...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.23278

    authors: Xiao X,Jiang L,Hu H,Huang Y,Yang L,Jiao Y,Wei G

    更新日期:2021-01-12 00:00:00

  • STAT1 gene expression is enhanced by nuclear EGFR and HER2 via cooperation with STAT3.

    abstract::Both EGFR and HER2 are important mediators of tumorigenesis and tumor progression. Despite their best-characterized roles as plasma membrane-bound receptors, both receptors undergo nuclear translocation though the impact of this process remains unclear. In this study, we provide evidence showing that EGFR upregulates ...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.21936

    authors: Han W,Carpenter RL,Cao X,Lo HW

    更新日期:2013-12-01 00:00:00

  • Aurora B kinase as a novel molecular target for inhibition the growth of osteosarcoma.

    abstract::Osteosarcoma is the primary human malignant tumor affecting bone. This cancer most frequently arises in children and adolescents, with a second peak in those over the age of 50. Currently, surgery followed by radiotherapy and chemotherapy are the main treatments, but long-term positive effects are very poor. Aurora B ...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.22993

    authors: Zhao Z,Jin G,Yao K,Liu K,Liu F,Chen H,Wang K,Gorja DR,Reddy K,Bode AM,Guo Z,Dong Z

    更新日期:2019-06-01 00:00:00

  • CpG hypermethylation of promoter region and inactivation of E-cadherin gene in human bladder cancer.

    abstract::Several studies have shown that E-cadherin expression is lost during malignant transformation. We hypothesized that CpG methylation in the promoter region may inactivate the expression of the E-cadherin gene in human bladder cancer. Normal and bladder cancer samples from 51 patients were compared in terms of E-cadheri...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.10064

    authors: Ribeiro-Filho LA,Franks J,Sasaki M,Shiina H,Li LC,Nojima D,Arap S,Carroll P,Enokida H,Nakagawa M,Yonezawa S,Dahiya R

    更新日期:2002-08-01 00:00:00

  • Diallyl trisulfides, a natural histone deacetylase inhibitor, attenuate HIF-1α synthesis, and decreases breast cancer metastasis.

    abstract::Intratumoral hypoxia promotes the distant metastasis of cancer subclones. The clinical expression level of hypoxia-inducible factor-1α (HIF-1α) reflects the prognosis of a variety of cancers, especially breast cancer. Histone deacetylase (HDAC) inhibitors can target HIF-1α protein due to von Hippel-Lindau (VHL) protei...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.22686

    authors: Wei Z,Shan Y,Tao L,Liu Y,Zhu Z,Liu Z,Wu Y,Chen W,Wang A,Lu Y

    更新日期:2017-10-01 00:00:00

  • Rheb promotes cancer cell survival through p27Kip1-dependent activation of autophagy.

    abstract::We previously found that the small GTPase Rheb regulates the cell-cycle inhibitor p27KIP1 (p27) in colon cancer cells by a mTORC1-independent mechanism. However, the biological function of the Rheb/p27 axis in cancer cells remains unknown. Here, we show that siRNA-mediated depletion of Rheb decreases survival of human...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.22272

    authors: Campos T,Ziehe J,Palma M,Escobar D,Tapia JC,Pincheira R,Castro AF

    更新日期:2016-02-01 00:00:00

  • Oncogene amplification per se: an independent prognostic factor in human breast cancer.

    abstract::As the prognostic significance of the three most frequently amplified oncogenes in breast cancer (c-myc, int-2/FGF3, and c-erbB-2/neu) is still unclear, and as the amplification of these genes appears to be mutually exclusive, we investigated the prognostic significance of oncogene amplification per se by multivariate...

    journal_title:Molecular carcinogenesis

    pub_type: 杂志文章

    doi:10.1002/mc.2940110403

    authors: Champème MH,Bièche I,Hacène K,Lidereau R

    更新日期:1994-12-01 00:00:00