abstract：:The interaction of urokinase-type plasminogen activator (uPA) with its cell-surface receptor (uPAR) is implicated in diverse biological processes such as cell migration, tissue remodeling, and tumor cell invasion. Recent studies indicated that uPAR can act as an extracellular matrix receptor during cell adhesion. Rece...

journal_title：Molecular carcinogenesis

authors： Chintala SK,Mohanam S,Go Y,Venkaiah B,Sawaya R,Gokaslan ZL,Rao JS

更新日期：1997-12-01 00:00:00

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

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

abstract：:Experimentally induced models of breast carcinogenesis in the rat are widely used for studying the biology of breast cancer and for developing and evaluating cancer prevention and control strategies. However, very little is known about gene expression changes that are associated with experimentally induced mammary car...

journal_title：Molecular carcinogenesis

authors： Lu J,Pei H,Kaeck M,Thompson HJ

更新日期：1997-10-01 00:00:00

abstract：:Glucocorticoid hormones are strong inhibitors of normal keratinocyte proliferation, but established mouse skin papillomas and carcinomas become resistant to these hormones. The biological effect of glucocorticoids is mediated through a highly specific glucocorticoid receptor (GR). To study the possible mechanisms of g...

journal_title：Molecular carcinogenesis

authors： Spiegelman VS,Budunova IV,Carbajal S,Slaga TJ

更新日期：1997-09-01 00:00:00

abstract：:The role of estrogen and the estrogen receptor (ER) in the induction and promotion of tumors was investigated by using transgenic MT-mER mice, which overexpress the ER. It was hypothesized that because of this abnormal expression of the ER, the reproductive-tract tissues of the MT-mER mice may be more susceptible to t...

journal_title：Molecular carcinogenesis

authors： Couse JF,Davis VL,Hanson RB,Jefferson WN,McLachlan JA,Bullock BC,Newbold RR,Korach KS

更新日期：1997-08-01 00:00:00

abstract：:Mutations in the Ki-ras oncogene and the p53 tumor suppressor gene are known to occur at high frequencies in human colon cancers. We measured the frequency of mutations in these two genes in colon adenocarcinomas obtained from a widely used experimental model of human colon carcinogenesis: F344 rats treated with the c...

journal_title：Molecular carcinogenesis

authors： Erdman SH,Wu HD,Hixson LJ,Ahnen DJ,Gerner EW

更新日期：1997-06-01 00:00:00

abstract：:The mouse benign keratinocyte cell line 308 was previously shown to have less AP-1 DNA binding and transactivation ability than its malignant variant 10Gy5. Because elevated AP-1 activity in 10Gy5 appears to be critical for its malignant phenotype, we were interested in examining the molecular mechanisms that regulate...

journal_title：Molecular carcinogenesis

authors： Joseloff E,Bowden GT

更新日期：1997-01-01 00:00:00

abstract：:The levels of the antioxidant enzyme manganese superoxide dismutase (Mn-SOD) are frequently decreased in tumor cells and increased in normal cells upon treatment with ionizing radiation. We studied Mn-SOD at different stages during the neoplastic conversion of radiation-initiated Syrian hamster embryo HDR-3 cells. Mn-...

journal_title：Molecular carcinogenesis

authors： Otero G,Avila MA,Emfietzoglou D,Clerch LB,Massaro D,Notario V

更新日期：1996-12-01 00:00:00

abstract：:Recent studies have implicated a role for midkine (MK) in cancer progression. This is based upon its structural homology with pleiotrophin, an angiogenic growth factor, and its ability to enhance fibrinolytic activity of bovine endothelial cells. To investigate whether MK plays a role in breast cancer, we examined MK ...

journal_title：Molecular carcinogenesis

authors： Chen Y,McKenzie KE,Aldaz CM,Sukumar S

更新日期：1996-11-01 00:00:00

abstract：:The molecular changes associated with the aging process include the reduced activity of transcription factors (such as AP-1) and an impaired response to stress, which has been well documented in the case of the heat-shock (HS) response. Using human diploid fibroblasts of early and late passages as an in vitro model fo...

journal_title：Molecular carcinogenesis

authors： Adler V,Dolan LR,Kim J,Pincus M,Barrett JC,Ronai Z

更新日期：1996-09-01 00:00:00

abstract：:To study the possible involvement of DNA damage in cell transformation induced by estrogens, we examined whether DNA adduct formation is elicited in cultured Syrian hamster embryo (SHE) cells treated with estrogens and their derivatives by means of the 32P-postlabeling assay. Morphological transformation of the cells ...

journal_title：Molecular carcinogenesis

authors： Hayashi N,Hasegawa K,Komine A,Tanaka Y,McLachian JA,Barrett JC,Tsutsui T

更新日期：1996-07-01 00:00:00

abstract：:An allelotype analysis of lung tumors in mouse hybrids was conducted to identify common regions of allelic loss. By using 50 informative genetic markers, the autosomes of 36 (A/J x C3H/HeJ) F1 adenocarcinomas were examined. Additional adenocarcinomas from as many as 72 (C3H/HeJ x A/J) F1 and 15 (BALB/cJ x DBA/2J) F1 h...

journal_title：Molecular carcinogenesis

authors： Herzog CR,Chen B,Wang Y,Schut HA,You M

更新日期：1996-06-01 00:00:00

abstract：:Most human colorectal cancers arise through the accumulation of a series of genetic alterations such as point mutations within the Ki-ras and p53 genes, but the chemical carcinogens that may be implicated in these events are still unidentified. In a previous study, we showed that DNA from human colorectal tissue conta...

journal_title：Molecular carcinogenesis

authors： Jackson PE,Hall CN,Badawi AF,O'Connor PJ,Cooper DP,Povey AC

更新日期：1996-05-01 00:00:00

abstract：:Microsatellite instability (MI) and loss of heterozygosity (LOH) were examined in mammary tumors induced in Sprague-Dawley x F344 F1 female rats by 2-amino-l-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP). Examination of 62 microsatellite loci revealed MI in nine of 15 (60%) PhIP-induced mammary tumors, and five of thes...

journal_title：Molecular carcinogenesis

authors： Toyota M,Ushijima T,Weisburger JH,Hosoya Y,Canzian F,Rivenson A,Imai K,Sugimura T,Nagao M

更新日期：1996-03-01 00:00:00

abstract：:Serially transplantable rat mammary tumor (RMT) cells are not dependent on exogenous epidermal growth factor (EGF) and insulin-like growth factor-I for continuous growth in serum-free medium. Previously, we found that conditioned medium obtained from these cells contained EGF-like mitogenic activity and stimulated tyr...

journal_title：Molecular carcinogenesis

authors： Ethier SP,Langton BC,Dilts CA

更新日期：1996-02-01 00:00:00

abstract：:This study examines the relationship between p53 immunostaining and direct sequencing of polymerase chain reaction (PCR) products in 61 gliomas. Glioma tissues obtained from patients at surgery were analyzed immunohistochemically with the monoclonal antibody PAb1801 to detect p53 protein abnormalities. Amplified p53 c...

journal_title：Molecular carcinogenesis

authors： Kyritsis AP,Xu R,Bondy ML,Levin VA,Bruner JM

更新日期：1996-01-01 00:00:00

abstract：:Quercetin, 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), and okadaic acid are found in various foods and have been shown to have mutagenic or promoter-like activity. The effects of these three compounds on the transmission of the inactive X chromosome were examined in MST-C6 murine tumor cells, which were de...

journal_title：Molecular carcinogenesis

authors： Kuwabara K,Odani S,Takahashi Y,Arakawa M,Takagi N,Nagao M,Kominami R

更新日期：1995-12-01 00:00:00

abstract：:To investigate the effect of tumor-associated macrophages on the in vivo growth properties of cervical carcinoma cells, tumorigenic human papilloma virus (HPV) 18-positive HeLa cells were transfected with an expression vector harboring the cDNA for the macrophage chemoattractant protein-1 JE (MCP-1). Although the endo...

journal_title：Molecular carcinogenesis

authors： Kleine K,König G,Kreuzer J,Komitowski D,Zur Hausen H,Rösl F

更新日期：1995-11-01 00:00:00

abstract：:In this study, we found that rat nasal coumarin-7-hydroxylase (COH) activity was two orders of magnitude higher than rat hepatic COH activity and could be induced by adding coumarin to the rats' drinking water. In western blot analysis, an anti-cytochrome P450 (Cyp) 2a-5 (mouse liver COH) antibody recognized a sharp b...

journal_title：Molecular carcinogenesis

authors： Béréziat JC,Raffalli F,Schmezer P,Frei E,Geneste O,Lang MA

更新日期：1995-10-01 00:00:00

abstract：:Environmental health science research, with its focus on fundamental science and disease prevention, is important for the development of rational and cost-effective public health and regulatory policies related to environmental protection. Environmentally related diseases are preventable, yet they impose a major burde...

journal_title：Molecular carcinogenesis

authors： Olden K,Klein JL

更新日期：1995-09-01 00:00:00

abstract：:Mutations induced by activated benzo[a]pyrene ((+)-anti-B[a]PDE) in Escherichia coli are being investigated, by using both random and adduct-site-specific mutagenesis approaches. A working hypothesis was proposed that the major adduct of (+)-anti-B[a]PDE (formed at N2-Gua) is able to induce different base-substitution...

journal_title：Molecular carcinogenesis

authors： Loechler EL

更新日期：1995-08-01 00:00:00

abstract：:To investigate the importance of oncogenes and tumor suppressor genes in bladder carcinogenesis, we determined the status of the expression of the MDM-2 and p53 genes and genetic alterations in the p53 gene in five bladder carcinoma cell lines and one kidney urothelial carcinoma cell line. Overexpression of MDM-2 mRNA...

journal_title：Molecular carcinogenesis

authors： Cheng YT,Li YL,Wu JD,Long SB,Tzai TS,Tzeng CC,Lai MD

更新日期：1995-07-01 00:00:00

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-tr...

journal_title：Molecular carcinogenesis

authors： Lee H,Shih MK

更新日期：1995-06-01 00:00:00

abstract：:In this report we characterized the transcriptional regulation of the rat mdr1b gene by xenobiotics. The expression of this gene was increased in primary rat hepatocytes and in the H4-II-E hepatoma cell line by exposure to carcinogens such as aflatoxin B1, N-acetoxy-2-acetylaminofluorene, and methyl methanesulfonate. ...

journal_title：Molecular carcinogenesis

authors： Silverman JA,Hill BA

更新日期：1995-05-01 00:00:00

abstract：:1-Hydroxyanthraquinone (1-HA), which is present in some herbs, and methylazoxymethanol (MAM) acetate, a metabolite of azoxymethane, show synergistic carcinogenicity in rat colon, and 1-HA induces ulcerative changes with simultaneous severe inflammation of the entire colon. In this study, mutations in Ki-ras (exons 1 a...

journal_title：Molecular carcinogenesis

authors： Suzui M,Yoshimi N,Ushijima T,Hirose Y,Makita H,Wang A,Kawamori T,Tanaka T,Mori H,Nagao M

更新日期：1995-04-01 00:00:00

abstract：:O6-Alkylguanine is a major toxic, mutagenic, and carcinogenic lesion in cellular DNA that is repaired by O6-alkylguanine-DNA alkyltransferase (ATase). The expression of this gene is directly related to the cellular sensitivity of alkylating agents, with levels of this protein varying widely among human organs, tumors,...

journal_title：Molecular carcinogenesis

authors： Wani G,D'Ambrosio SM

更新日期：1995-03-01 00:00:00

abstract：:The tyrosinase promoter has been used to target expression of the mutated human T24 Ha-ras oncogene in pigment-producing cells of transgenic mice. Two independent founder mice carrying the transgene survived and showed the same distinct phenotype of mutated coat color, deeply pigmented skin with multiple nevi, and twi...

journal_title：Molecular carcinogenesis

authors： Powell MB,Hyman P,Bell OD,Balmain A,Brown K,Alberts D,Bowden GT

更新日期：1995-02-01 00:00:00

abstract：:The adenovirus type 5 (Ad5) 55-kDa E1B oncoprotein has been shown to form complexes with the p53 tumor suppressor protein. These complexes are thought to interfere with normal p53 activity and may be responsible for the paucity of p53 mutations in cells transformed by these viruses. This report describes an example of...

journal_title：Molecular carcinogenesis

authors： Eyler YL,Siwarski DF,Huppi KE,Lewis AM Jr

更新日期：1995-01-01 00:00:00

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

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

更新日期：1994-12-01 00:00:00

abstract：:Many cytotoxic agents kill cells by invoking a specific death pathway termed physiological cell death, or apoptosis. Treatment of a murine hemopoietic stem cell line, FDCP-mix, with methylmethanesulfonate (MMS) or N'-methyl-N'-nitrosourea (MNU) leads to death by apoptosis. Retroviral gene transfer was used to overexpr...

journal_title：Molecular carcinogenesis

authors： Fairbairn LJ,Cowling GJ,Dexter TM,Rafferty JA,Margison GP,Reipert B

更新日期：1994-09-01 00:00:00

abstract：:The metalloproteinase matrilysin is widely expressed in the epithelial tumor cells of malignant colorectal adenocarcinomas. Approximately 50% of benign adenomas also express low levels of matrilysin that is focally localized. The expression of stromelysin-1, stromelysin-3, and gelatinase A was observed in the stromal ...

journal_title：Molecular carcinogenesis

authors： Newell KJ,Witty JP,Rodgers WH,Matrisian LM

更新日期：1994-08-01 00:00:00

abstract：:The influence of the tumor promoter 2-acetylaminofluorene (2-AAF) on cell proliferation and on the epidermal growth factor receptor (EGFR) system was assessed in normal and nodular rat livers. DNA replication in vivo was inhibited below the detection level after 8d of dietary 2-AAF treatment of previously unexposed ra...

journal_title：Molecular carcinogenesis

authors： Strömblad S,Eriksson LC,Andersson G

更新日期：1994-06-01 00:00:00

abstract：:Some of the progeny of isolated mouse embryo fibroblasts acquire the ability to grow indefinitely during cultivation, presumably through some mutational events. The relevance of p53 mutations and loss of heterozygosity to the mechanism of such immortal growth capability remains controversial. Since four bases in intro...

journal_title：Molecular carcinogenesis

authors： Tokumitsu M,Kadohama T,Ogawa K

更新日期：1994-05-01 00:00:00

abstract：:Cytogenetic and molecular studies of human renal cell carcinoma (RCC) have suggested that the genetic and functional losses of one or more putative tumor suppressor genes on the short arm of chromosome 3 play a crucial role in the development of this disease. To examine whether the introduction of chromosome 3 has any...

journal_title：Molecular carcinogenesis

authors： Yoshida MA,Shimizu M,Ikeuchi T,Tonomura A,Yokota J,Oshimura M

更新日期：1994-03-01 00:00:00

abstract：:2-Amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) is the most abundant mutagenic heterocyclic amine in cooked foods. Two mouse tumor cell lines, BMT11 and FM3A, were exposed to its proximate form, 2-hydroxyamino-1-methyl-6-phenylimidazo[4,5-b]pyridine (N-OH-PhIP). Fifty-six subclones of BMT11 and 39 subclones of ...

journal_title：Molecular carcinogenesis

authors： Kitazawa T,Kominami R,Tanaka R,Wakabayashi K,Nagao M

更新日期：1994-02-01 00:00:00

abstract：:We examined the expression of two groups of matrix metalloproteinases (MMPs), stromelysin and interstitial collagenase, in human skin cancer by northern blot analysis and in situ hybridization. Stromelysin-3 (ST-3) mRNA was overexpressed more than tenfold in 17 of 19 (89%) specimens of basal cell carcinoma (BCC) but i...

journal_title：Molecular carcinogenesis

authors： Majmudar G,Nelson BR,Jensen TC,Voorhees JJ,Johnson TM

更新日期：1994-01-01 00:00:00

abstract：:Fusion between HeLa cells and normal human fibroblasts results in the suppression of tumorigenicity. Under prolonged culture conditions, rare tumorigenic segregants arise and have been shown to reexpress a cell surface antigen, p75, which is also present in the HeLa parent but not in the fibroblast parent or in the no...

journal_title：Molecular carcinogenesis

authors： Gross MM,Janiaud P,Stanbridge EJ

更新日期：1993-01-01 00:00:00

abstract：:2-Amino-3-methylimidazo[4,5-f]quinoline (IQ) and 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MelQx) are carcinogens found in cooked meats that form DNA adducts upon metabolic activation. Purified DNA from Chinese hamster ovary (CHO) cells was reacted in vitro with the active metabolites N-acetoxy-IQ or N-acetoxy-Me...

journal_title：Molecular carcinogenesis

authors： Nouso K,Bohr VA,Schut HA,Snyderwine EG

更新日期：1993-01-01 00:00:00

abstract：:A rapid and sensitive assay was developed to detect CAA-->AAA mutations at codon 61 of Ha-ras. The region surrounding codon 61 was amplified by the polymerase chain reaction (PCR) using one primer containing a mismatch at the second position of codon 60. Using this primer creates an Msel restriction enzyme site if cod...

journal_title：Molecular carcinogenesis

authors： Shinder GA,Manam S,Nichols WW

更新日期：1993-01-01 00:00:00

abstract：:An in vitro model system for xenogenization has been developed in which an immunogenic, nonmalignant phenotype was selected from a highly malignant T-cell line (S49). We showed by single-strand conformation polymorphism and DNA sequence analysis that specific point mutations in the p53 tumor suppressor gene correlated...

journal_title：Molecular carcinogenesis

authors： Bergel M,Bhatia K,Siwarski D,Gutierrez M,Hochman J,Huppi K

更新日期：1993-01-01 00:00:00