aristolochic acid a/carcinogenesis

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Applications of the human p53 knock-in (Hupki) mouse model for human carcinogen testing.

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Tumor-driving mutations in the TP53 gene occur frequently in human cancers. These inactivating mutations arise predominantly from a single-point mutation in the DNA-binding domain of this tumor suppressor gene (i.e., exons 4-9). The human p53 knock-in (Hupki) mouse model was constructed using

Metabolic activation of carcinogenic aristolochic acid, a risk factor for Balkan endemic nephropathy.

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Aristolochic acid (AA), a naturally occurring nephrotoxin and carcinogen, is associated with tumor development in patients suffering from Chinese herbs nephropathy (now termed aristolochic acid nephropathy, AAN) and may also be a cause for the development of a similar type of nephropathy, the Balkan

Multiclass Carcinogenic DNA Adduct Quantification in Formalin-Fixed Paraffin-Embedded Tissues by Ultraperformance Liquid Chromatography-Tandem Mass Spectrometry.

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DNA adducts are a measure of internal exposure to genotoxicants and an important biomarker for human risk assessment. However, the employment of DNA adducts as biomarkers in human studies is often restricted because fresh-frozen tissues are not available. In contrast, formalin-fixed

MicroRNA expression profiles distinguish the carcinogenic effects of riddelliine in rat liver.

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Pyrrolizidine alkaloids (PAs) are the most common plant constituents that poison livestock, wildlife and humans. Riddelliine is a prototype genotoxic PA and has been nominated to be classified as a reasonably anticipated human carcinogen by the US National Toxicology Program (NTP) in the 12th Report

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

How the environment shapes cancer genomes.

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OBJECTIVE The mutational patterns of cancer genomes allow conclusions or generation of hypotheses as to what mechanisms or environmental, dietary or occupational exposures might have created the mutations and therefore will have contributed to the formation of the cancer. The arguments for cancer

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.

Mutational signature of aristolochic acid: Clue to the recognition of a global disease.

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Mutational signatures associated with specific forms of DNA damage have been identified in several forms of human cancer. Such signatures provide information regarding mechanisms of tumor induction which, in turn, can reduce exposure to carcinogens by shaping public health policy. Using a molecular

Induction of structural chromosome aberrations and sister chromatid exchanges in human lymphocytes in vitro by aristolochic acid.

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The medicinal use of Aristolochia clematitis has been known for some time. The main active agent of this medicinal plant is aristolochic acid, a nitrophenanthrenecarbonic acid. Very recently, however, the Federal Health Office withdrew the licence for all drugs containing aristolochic acid, because

Endemic (Balkan) nephropathy is aristolochic acid nephropathy.

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Endemic nephropathy is a syndrome that comprises two entities: chronic interstitial nephropathy and urothelial cell cancers predominantly of the upper urinary tract. The etiological agent for the disease is aristolochic acid, a compound found in the plants of Aristolochia spp. The development of

Differentiation between two "fang ji" herbal medicines, Stephania tetrandra and the nephrotoxic Aristolochia fangchi, using hyperspectral imaging.

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Stephania tetrandra ("hang fang ji") and Aristolochia fangchi ("guang fang ji") are two different plant species used in Traditional Chinese Medicine (TCM). Both are commonly referred to as "fang ji" and S. tetrandra is mistakenly substituted and adulterated with the nephrotoxic A. fangchi as they

Aristolactam-DNA adducts are a biomarker of environmental exposure to aristolochic acid.

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Endemic (Balkan) nephropathy is a chronic tubulointerstitial disease frequently accompanied by urothelial cell carcinomas of the upper urinary tract. This disorder has recently been linked to exposure to aristolochic acid, a powerful nephrotoxin and human carcinogen. Following metabolic activation,

Aristolochic acid-associated urothelial cancer in Taiwan.

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Aristolochic acid, a potent human carcinogen produced by Aristolochia plants, is associated with urothelial carcinoma of the upper urinary tract (UUC). Following metabolic activation, aristolochic acid reacts with DNA to form aristolactam (AL)-DNA adducts. These lesions concentrate in the renal

Comparison of the oxidation of carcinogenic aristolochic acid I and II by microsomal cytochromes P450 in vitro: experimental and theoretical approaches.

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UNASSIGNED The herbal drug aristolochic acid, a natural mixture of 8-methoxy-6-nitrophenanthro[3,4-d]-1,3-dioxole-5-carboxylic acid (AAI) and 6-nitrophenanthro[3,4-d]-1,3-dioxole-5-carboxylic acid (AAII), is derived from Aristolochia species and is the cause of two nephropathies. Ingestion of

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