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aristolochic acid ii/carcinogenesis
Veza se sprema u međuspremnik
15 rezultati
N6-adenyl arylation of DNA by aristolochic acid II and a synthetic model for the putative proximate carcinogen.
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Aristolochic acid II (AAII), one of the major components of the carcinogenic plant extract aristolochic acid, is known to be mutagenic and to form DNA adducts in vitro and in vivo. The major fluorescent DNA adduct formed upon xanthine oxidase mediated reduction in the presence of calf thymus (CT-)
In vivo Comet assay on isolated kidney cells to distinguish genotoxic carcinogens from epigenetic carcinogens or cytotoxic compounds.
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The objective of this study was to determine the ability of the alkaline in vivo Comet assay (pH>13) to distinguish genotoxic carcinogens from epigenetic carcinogens when performed on freshly isolated kidney cells and to determine the possible interference of cytotoxicity by assessing DNA damage
Adenine versus guanine DNA adducts of aristolochic acids: role of the carcinogen-purine linkage in the differential global genomic repair propensity.
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Computational modeling is employed to provide a plausible structural explanation for the experimentally-observed differential global genome repair (GGR) propensity of the ALII-N(2)-dG and ALII-N(6)-dA DNA adducts of aristolochic acid II. Our modeling studies suggest that an intrinsic twist at the
Translesional synthesis on DNA templates containing site-specifically placed deoxyadenosine and deoxyguanosine adducts formed by the plant carcinogen aristolochic acid.
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Synthetic oligonucleotides (18-mers) containing either a single deoxyadenosine residue or a single deoxyguanosine residue were treated with aristolochic acid I (AAI) or aristolochic acid II (AAII), the main components of the plant carcinogen aristolochic acid (AA). These reactions resulted in the
Comparison of the mutagenicity of aristolochic acid I and aristolochic acid II in the gpt delta transgenic mouse kidney.
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Aristolochic acid (AA) is known to be a potent mutagen and carcinogen. Aristolochic acid I (AAI) and aristolochic acid II (AAII), the two major components of AA, differ from each other by a single methoxy group. However, their individual mutagenic characteristics in vivo are unclear. In the present
Effect of site-specifically located aristolochic acid DNA adducts on in vitro DNA synthesis by human DNA polymerase alpha.
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In order to examine the effect of purine adducts of the plant carcinogen aristolochic acid (AA) on DNA replication four 30-mer templates were prepared which contained single site-specific AA lesions. The oligonucleotides were isolated by HPLC and shown to contain the two known aristolochic acid
Mass Spectrometric and Spectrofluorometric Studies of the Interaction of Aristolochic Acids with Proteins.
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Aristolochic acid (AA) is a potent carcinogen and nephrotoxin and is associated with the development of "Chinese herb nephropathy" and Balkan endemic nephropathy. Despite decades of research, the specific mechanism of the observed nephrotoxicity has remained elusive and the potential effects on
Differential cytotoxic effects of denitroaristolochic acid II and aristolochic acids on renal epithelial cells.
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Aristolochic acids (AAs), naturally occurring nephrotoxins and rodent carcinogens, are commonly found in medicinal plants such as Radix aristolochiae. The toxicity of AAs is believed to be associated with the formation of promutagenic AA-DNA adducts, and it has also been suggested that the nitro
32P-postlabelling analysis of the DNA adducts formed by aristolochic acid I and II.
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We report the quantitation of DNA adducts in target and nontarget organs of male Wistar rats treated orally with five daily doses (10 mg/kg body wt) aristolochic acid I (AAI) or aristolochic acid II (AAII), the major components of the herbal drug aristolochic acid, a forestomach carcinogen in the
A sensitive enzyme-linked immunosorbent assay for detecting carcinogenic aristolochic acid in herbal remedies.
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Aristolochic acid, a naturally occurring nephrotoxin and rodent carcinogen, has been associated with the development of various nephropathies in humans. Developing a sensitive and rapid method to screen the aristolochic acid levels in herbal remedies is urgent for protecting public health.
Analysis of urinary aristolactams by on-line solid-phase extraction coupled with liquid chromatography-tandem mass spectrometry.
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Aristolochic acids (AAs), nephrotoxicants and known human carcinogens, are a mixture of structurally related derivatives of nitrophenanthrene carboxylic acids with the major components being aristolochic acid I and aristolochic acid II. People may ingest small amounts of AAs from its natural
Aristolochic acid as a probable human cancer hazard in herbal remedies: a review.
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The old herbal drug aristolochic acid (AA), derived from Aristolochia spp., has been associated with the development of a novel nephropathy, designated aristolochic acid nephropathy (AAN), and urothelial cancer in AAN patients. There is clear evidence that the major components of the plant extract
32P-post-labelling analysis of DNA adducts formed by aristolochic acid in tissues from patients with Chinese herbs nephropathy.
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Recently, we reported that aristolochic acid (AA) a naturally occurring nephrotoxin and carcinogen is implicated in a unique type of renal fibrosis, designated Chinese herbs nephropathy (CHN). Indeed, we identified the principal aristolochic acid-DNA adduct in the kidney of five such patients. We
Characterization of DNA adducts formed by aristolochic acids in the target organ (forestomach) of rats by 32P-postlabelling analysis using different chromatographic procedures.
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We report the analysis of DNA adducts in the target organ (forestomach) of male Sprague-Dawley rats treated orally with two doses (10 mg/kg body wt) per week for 2 weeks of either aristolochic acid I (AAI), aristolochic acid II (AAII) or the plant extract aristolochic acid (AA). DNA adducts were
Development of an Eastern blotting technique for the visual detection of aristolochic acids in Aristolochia and Asarum species by using a monoclonal antibody against aristolochic acids I and II.
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BACKGROUND
Aristolochic acids (AAs) are naturally occurring nephrotoxicants and human carcinogens. Aristolochic acid I (AA-I) and aristolochic acid II (AA-II) are two important AAs with clear toxicity.
OBJECTIVE
To obtain a monoclonal antibody (MAb) recognising AA-I and AA-II and develop an Eastern
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