نتایج جستجو برای: benzoapyrene bap

تعداد نتایج: 3093  

Journal: :Drug metabolism and disposition: the biological fate of chemicals 2014
Anja-Maria Möller Corinna Hermsen Tilman Floehr Marja H Lamoree Helmut Segner

Polycyclic aromatic hydrocarbons (PAHs) are immunotoxicants in fish. In mammals, phase I metabolites are believed to be critically involved in the immunotoxicity of PAHs. This mechanism has been suggested for fish as well. The present study investigates the capacity of immune organs (head kidney, spleen) of rainbow trout, Oncorhynchus mykiss, to metabolize the prototypic PAH, benzo[a]pyrene (Ba...

Journal: :Mutagenesis 2008
Pim W J de Waard Theo M C M de Kok Lou M Maas Ad A C M Peijnenburg Ron L A P Hoogenboom Jac M M J G Aarts Frederik-Jan van Schooten

Several compounds originating from cruciferous vegetables and citrus fruits bind to and activate the aryl hydrocarbon receptor (AhR). This receptor plays an important role in the toxicity of the known tumour promoter and potent AhR-agonist 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). However, vegetables and fruits are generally considered as healthy. Therefore, besides the AhR activation, the na...

Journal: :Cancer research 1986
P L Chiu S K Yang

7,8-Dihydrobenzo[a]pyrene (7,8-H2BaP) was metabolized by rat liver microsomes to form 7,8,9,10-tetrahydro-BaP trans-9,10-diol, 7,8,9,10-tetrahydro-BaP cis-9,10-diol, 7-hydroxy-7,8-H2BaP, 8-hydroxy-7,8-H2BaP, two phenolic products of 7,8-H2BaP [abbreviated as 7,8-H2BaP phenol 1 and phenol 2 according to their elution order on reversed-phase high-performance liquid chromatography (HPLC)], 4,5,7,8...

Journal: :Cancer research 1985
S M Sebti D Pruess-Schwartz W M Baird

The activation of benzo(a)pyrene (BaP) to DNA-binding metabolites in early-passage embryo cell cultures prepared from various species of rodents was investigated by exposing cells from mice (BALB/c and Sencar), rats (Wistar and Fischer 344), and Syrian hamsters to [3H]BaP for various lengths of time. The BaP:DNA adducts containing cis-vicinal hydroxyl groups such as those formed from 7 beta,8 a...

2007
Anthony E. Archibong Aramandla Ramesh Mohammad S. Niaz Cynthia M. Brooks Shannon I. Roberson Donald D. Lunstra

The objective of this study was to evaluate the reproductive risk associated with exposure of adult male Fisher-344 rats to inhaled benzo(a)pyrene (BaP), a ubiquitous environmental toxicant present in cigarette smoke, automobile exhaust fumes and industrial emissions. Rats were assigned randomly to a treatment or control group. Treatment consisted of sub-chronic exposure of rats via inhalation ...

2017
Gea Oliveri Conti Aldo Eugenio Calogero Filippo Giacone Maria Fiore Martina Barchitta Antonella Agodi Margherita Ferrante

Benzo(a)pyrene (BaP) is a carcinogenic polycyclic aromatic hydrocarbon for human tissues. Still today it is not fully investigated if BaP can affect negatively the male fertility through the BaP‑DNA adducts production. In the present study, BaP Tetrol I‑1 (TI‑1) and BaP Tetrol II‑2 (TII‑2) BaP‑DNA adducts were investigated in spermatozoa of a Sicilian male population. Semen samples from 86 volu...

Journal: :The Journal of Cell Biology 1985
D T Wong D K Biswas

Human lung cells (ChaGo) derived from a bronchogenic carcinoma synthesize and secrete in the culture medium the alpha subunit of the glycoprotein hormone, human chorionic gonadotropin (alpha-hCG). The synthesis of alpha-hCG by ChaGo cells could be further stimulated by treatment with sublethal concentrations of the polycyclic aromatic hydrocarbons (PAHs), benzo(a)pyrene (BaP), or dimethylbenzan...

Journal: :Journal of the American Society of Nephrology : JASN 1996
P Ureña M Hruby A Ferreira K S Ang M C de Vernejoul

Plasma total versus bone alkaline phosphatase as markers of bone turnover in hemodialysis patients. Plasma bone-specific alkaline phosphatase (bAP) has been demonstrated to be more reliable than total alkaline phosphatases (tAP) in providing information about bone turnover in patients with metabolic bone diseases. This study surveyed 42 hemodialysis patients who underwent a systematic transilia...

Journal: :Journal of bacteriology 2004
María Jesús Arrizubieta Alejandro Toledo-Arana Beatriz Amorena José R Penadés Iñigo Lasa

Bap (biofilm-associated protein) is a 254-kDa staphylococcal surface protein implicated in formation of biofilms by staphylococci isolated from chronic mastitis infections. The presence of potential EF-hand motifs in the amino acid sequence of Bap prompted us to investigate the effect of calcium on the multicellular behavior of Bap-expressing staphylococci. We found that addition of millimolar ...

Journal: :Journal of neurophysiology 2010
Marco Fuenzalida David Fernández de Sevilla Alejandro Couve Washington Buño

The cellular mechanisms that mediate spike timing-dependent plasticity (STDP) are largely unknown. We studied in vitro in CA1 pyramidal neurons the contribution of AMPA and N-methyl-d-aspartate (NMDA) components of Schaffer collateral (SC) excitatory postsynaptic potentials (EPSPs; EPSP(AMPA) and EPSP(NMDA)) and of the back-propagating action potential (BAP) to the long-term potentiation (LTP) ...

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