Abstract:
:Genetic polymorphisms have been reported in several cytochrome P450 (CYP) genes, including CYP1B1 which metabolically activates procarcinogens present in tobacco to carcinogenic intermediates. This study used a case-control approach in North Indian population to determine associations between genetic variants in CYP1B1 and risk of Head and Neck Squamous Cell Carcinoma (HNSCC). We examined the genotype and haplotype frequencies at various single-nucleotide polymorphisms (SNPs), including SNPs previously reported in the promoter region and intron 1 of CYP1B1 in Caucasians. Using cycle sequencing, 9 SNPs were identified in the promoter region, intron 1, and exons 2 and 3. Haplotype analysis revealed that 5 SNPs (those in the promoter region, intron, and Arg48Gly and Ala119Ser in exon 2) were in strong linkage disequilibrium (LD). Cases with the T-A-T-G-T haplotype were significantly associated with increased risk of HNSCC. Interestingly, qRT-PCR studies revealed a significant increase in mRNA expression of CYP1B1 in peripheral blood isolated from cases with the T-A-T-G-T haplotype compared with cases with the C-G-C-C-G haplotype, and in cases compared to controls for both main haplotypes. The data thus provide evidence that CYP1B1 haplotypes could be more effective in predicting HNSCC risk. Environ. Mol. Mutagen. 58:443-450, 2017. © 2017 Wiley Periodicals, Inc.
journal_name
Environ Mol Mutagenjournal_title
Environmental and molecular mutagenesisauthors
Katiyar T,Maurya SS,Hasan F,Singh AP,Khan AJ,Hadi R,Singh S,Bhatt MLB,Parmar Ddoi
10.1002/em.22098subject
Has Abstractpub_date
2017-07-01 00:00:00pages
443-450issue
6eissn
0893-6692issn
1098-2280journal_volume
58pub_type
杂志文章abstract::Isothiocyanates (ITCs) are commonly found in cruciferous vegetables. A variety of biological activities have been ascribed to ITCs, such as inhibition of cytochrome P450 enzymes and induction of phase II enzymes in animal models. ITCs are also able to block cell-cycle progression and induce apoptosis in human cancer c...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20156
更新日期:2005-12-01 00:00:00
abstract::The genotoxicity of humic acid and its possible interaction with the herbicides alachlor and maleic hydrazide have been evaluated in cultured human lymphocytes from two donors. Humic acid and the two herbicides have been tested (alone and combined) for sister-chromatid exchange (SCE) induction. In addition, the effect...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/(sici)1098-2280(1997)29:3<272::aid-em7>3.0
更新日期:1997-01-01 00:00:00
abstract::DNA is exposed to endogenous and environmental factors that can form stable lesions. If not repaired, these lesions can lead to transcription/replication blocking or mutagenic bypass. Our previous work has focused on 8,5'-cyclopurine 2'-deoxyribonucleosides, a unique class of oxidatively induced DNA lesions that are s...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20619
更新日期:2011-05-01 00:00:00
abstract::Fluorescence in situ hybridization with 7, 17, X, and Y chromosome-specific DNA probe was used to investigate the ability of Adriamycin (AM) to induce aneuploidy in interphase human lymphocytes. The reliability of the probes was tested by hybridization to metaphases and interphase nuclei of untreated normal lymphocyte...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/(sici)1098-2280(1999)33:2<161::aid-em8>3.0
更新日期:1999-01-01 00:00:00
abstract::DNA damage induced by solar ultraviolet (UV) radiation plays an important role in the induction of skin cancer. Although UVA constitutes the majority of solar UV radiation, it is less damaging to DNA than UVB. The DNA damage produced by UVA radiation, however, can be augmented in the presence of a photosensitizer. We ...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20166
更新日期:2006-01-01 00:00:00
abstract::Loss of heterozygosity (LOH) is a critical event in the development of human cancers. LOH is thought to result from either a large deletion or recombination between homologous alleles during repair of DNA double-strand breaks (DSBs). These types of genetic alterations produce mutations in the TK gene mutation assay, w...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章,评审
doi:10.1002/em.20113
更新日期:2005-03-01 00:00:00
abstract::Exposure to emissions from laser printers during the printing process is commonplace worldwide, both in the home and workplace environment. In the present study, cytotoxic and genotoxic effects of the emission from five low to medium-throughput laser printers were investigated with respect to the release of ozone (O(3...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20695
更新日期:2012-03-01 00:00:00
abstract::The accessibility of reactive metabolites to test cells is critical for a genotoxic response. However, sulfo-conjugates formed outside may not readily enter cells, and some metabolites formed by cytochromes P450 (CYPs) may not endure transport. This topic was addressed in the present study, using V79 cells engineered ...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.22309
更新日期:2020-02-01 00:00:00
abstract::Noncovalent DNA interactions, e.g., DNA intercalation and DNA groove-binding, have not been well studied relative to covalent interactions largely due to the inability of predicting and detecting such events in intact cells. We have adapted an in vitro bleomycin amplification method for DNA intercalation for use in cu...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章,评审
doi:10.1002/em.20096
更新日期:2005-03-01 00:00:00
abstract::Two phenotypic classes of selectable tk-/- mutants have been isolated from the TK6 human lymphoblast cell line; one has a normal growth rate (tkn) relative to the parental cell line; the other has a slow growth rate (tks). Complete karyotypes of metaphase chromosomes were prepared and analyzed from 16 tks mutants (eig...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.2850140304
更新日期:1989-01-01 00:00:00
abstract::Radiation and many chemicals have been found to induce homologous genetic recombination. Experimental systems that allow the detection and characterization of recombinagens exist in organisms as diverse as bacteria, fungi, plants, insects, and mammals. Recombination plays an important role in many biological processes...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章,评审
doi:10.1002/em.2850230614
更新日期:1994-01-01 00:00:00
abstract::Polybrominated diphenyl ethers (PBDEs), which are widely used as flame retardants, are considered persistent organic pollutants. To date, the available toxicological data on PBDEs are limited and were primarily obtained by studying technical blends. The present study was undertaken to investigate the genotoxicity of t...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.10178
更新日期:2003-01-01 00:00:00
abstract::Lack of cell surface glycosylphosphatidylinositol (GPI)-anchored protein(s) has been used as a reporter of Pig-a gene mutation in several model systems. As an extension of this work, our laboratory initiated development of an in vitro mutation assay based on the flow cytometric assessment of CD90.2 expression on the c...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.22154
更新日期:2018-01-01 00:00:00
abstract::We evaluated the mutagens in fumes produced by heating three different cooking oils used in Taiwan to temperatures of 100 degrees C, 200 degrees C, and 300 degrees C, and constructed models to study the efficacy of fume extractors used commonly by Taiwanese women. Particulates of volatile emissions from lard (at 200 d...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::The aim of this study was to investigate genotoxic effects of lamivudine (an analogue of cytidine) using in vitro sister chromatid exchange (SCE), chromosome aberration (CA), and micronucleus (MN) tests in human peripheral lymphocytes. The cells were treated with 75, 100, 125, and 150 microg/ml concentrations of lamiv...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20393
更新日期:2008-05-01 00:00:00
abstract::Antioxidant vitamins are able to deactivate highly bioactive molecules, such as free radicals, that are generated during cellular biochemical processes. Doxorubicin (DXR) is a cancer chemotherapeutic agent that generates free radicals as a byproduct. In the present study, the Drosophila melanogaster somatic wing spot ...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20160
更新日期:2006-01-01 00:00:00
abstract::Mitochondria are dynamic organelles that are involved in a number of diverse processes. Most often the mitochondrion is associated with energy generation, but other important processes occur in this organelle such as fatty acid synthesis and amino acid metabolism. Although mitochondria encode less than 40 genes, all o...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20508
更新日期:2009-10-01 00:00:00
abstract::Coal is the largest fossil fuel source used for the generation of energy. However, coal extraction and its use constitute important pollution factors; thus, risk characterization and estimation are extremely important for the safety of coal workers and the environment. Candiota is located to the southeast of the state...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21744
更新日期:2013-01-01 00:00:00
abstract::During the development of cancer a series of specific genetic alterations have to occur in a stepwise fashion to transform a normal somatic cell into a malignant tumor cell. These genetic changes can be roughly divided in two groups: mutations in proto-oncogenes that result in a constantly activated gene product and m...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:
更新日期:1999-01-01 00:00:00
abstract::The tumor suppressor breast cancer susceptibility protein 1 (BRCA1) protects our cells from genomic instability in part by facilitating the efficient repair of DNA double-strand breaks (DSBs). BRCA1 promotes the error-free repair of DSBs through homologous recombination and is also implicated in the regulation of nonh...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21674
更新日期:2012-01-01 00:00:00
abstract::In vitro transcriptional signatures that predict toxicities can facilitate chemical screening. We previously developed a transcriptomic biomarker (known as TGx-28.65) for classifying agents as genotoxic (DNA damaging) and non-genotoxic in human lymphoblastoid TK6 cells. Because TK6 cells do not express cytochrome P450...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.22004
更新日期:2016-05-01 00:00:00
abstract::Phosphine is an important fumigant in the grain industry and has been reported to be genotoxic in occupationally exposed fumigators. This study reports on the effects of phosphine inhalation exposure at up to, and exceeding, occupational relevant levels in a subchronic (0.3, 1.0 and 4.5 ppm, 13 weeks) and a short term...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.2850240202
更新日期:1994-01-01 00:00:00
abstract::Benzo(a)pyrene (BaP) is a mutagenic carcinogen that is ubiquitous in our environment. To better understand the toxic effects of BaP and to explore the relationship between toxicity and toxicogenomics profiles, we assessed global mRNA and microRNA (miRNA) expression in Muta™Mouse. Adult male mice were exposed by oral g...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.20668
更新日期:2012-01-01 00:00:00
abstract::Most women with breast cancer can become pregnant and give birth while undergoing radiation therapy and breastfeeding is generally not contraindicated. The induction of long-lived reactive species in proteins, such as casein by X-ray radiation and DNA damage to unexposed organisms, has been shown when ingesting irradi...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.22426
更新日期:2021-01-26 00:00:00
abstract::The modulation of 1,3-butadiene (BD)-induced DNA adducts by occupational exposure, glutathione S-transferase (GST) genotypes, single-strand breaks, and cytogenetic end points was studied in 15 workers and 11 controls. The exposed group consisted of 8 smokers and 7 nonsmokers, whereas the control group consisted of 7 n...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.1031
更新日期:2001-01-01 00:00:00
abstract::The L5178Y mouse lymphoma cell mutagenesis assay is used to detect the mutagenic activity of chemicals in a mammalian cell system. To evaluate this assay we compared the results of assays performed independently on 63 chemicals by laboratories at SRI International and Litton Bionetics, Inc. The two laboratories used s...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.2860120506
更新日期:1988-01-01 00:00:00
abstract::Benzene is an important industrial chemical and widespread environmental pollutant known to induce leukemia and other blood disorders. To be carcinogenic, benzene must be metabolized to produce toxic metabolites. To investigate whether single nucleotide polymorphisms (SNPs) in the metabolic enzyme genes are associated...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21786
更新日期:2013-07-01 00:00:00
abstract::To evaluate whether blood-based genotoxicity endpoints can provide temporal and dose-response data within the low-dose carcinogenic range that could contribute to carcinogenic mode of action (MoA) assessments, we evaluated the sensitivity of flow cytometry-based micronucleus and Pig-a gene mutation assays at and below...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/em.21846
更新日期:2014-05-01 00:00:00
abstract::The human transcriptome is complex, comprising multiple transcript types, mostly in the form of non-coding RNA (ncRNA). The majority of ncRNA is of the long form (lncRNA, ≥ 200 bp), which plays an important role in gene regulation through multiple mechanisms including epigenetics, chromatin modification, control of tr...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章,评审
doi:10.1002/em.21798
更新日期:2013-08-01 00:00:00
abstract::Coumarin (1,2-benzopyrone), a natural food constituent, prevents polycyclic aromatic hydrocarbon-induced neoplasms in rats and mice, but has not been studied with other chemical carcinogens. We examined coumarin chemoprotection against aflatoxin B1 using the 6-thioguanine resistance mutation assay in two different Chi...
journal_title:Environmental and molecular mutagenesis
pub_type: 杂志文章
doi:10.1002/(sici)1098-2280(1998)32:1<64::aid-em8>3.0.
更新日期:1998-01-01 00:00:00