aristolochic acid a/neoplasms

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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

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

Endemic nephropathy: the case for chronic poisoning by aristolochia.

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OBJECTIVE To explore the hypothesis that chronic dietary poisoning by aristolochic acid could account for the unique geographical distribution, specific pattern of tubulointerstitial fibrosis, occurrence of chronic renal insufficiency, and an increased risk of developing upper urothelial cancer, all

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

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

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

Three-dimensional cell bioreactor coupled with high performance liquid chromatography-mass spectrometry for the affinity screening of bioactive components from herb medicine.

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An efficient and convenient method, three-dimensional (3-D) cell bioreactor coupled with high performance liquid chromatography-mass spectrometry was developed for affinity screening and analysis of multiple bioactive components from herbal medicines. Cancer cells were cultured on a porous scaffold

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

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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