background: this study aimed to compare the cytochrome p450 1a1 (cyp1a1) gene expression in the cord blood of infants born from mothers living in low- and high-air polluted areas. materials and methods: te study was conducted in spring 2012 in isfahan, the second large and air-polluted city in iran. the study comprised 60 neonates, consisting of 30 infants born from mothers residing in areas wi...

Recent studies have examined the relationship between genetic polymorphisms of the human cytochrome P-4501A1 (CYP1A1) gene and lung cancer susceptibility. We have quantified genotypic frequencies and measured gene expression in the CYP1A1 gene within racially diverse groups in order to determine the relationship between genotype and transcriptional regulation of the CYP1A1 gene. Lymphocytes wer...

The dioxin 2,3,7,8-tetrachlorodibenzo-para-dioxin (TCDD) induces phase I and II xenobiotic metabolizing enzymes (XME) which act sequentially to eliminate different classes of xenobiotics. The transcriptional effects of TCDD are generally mediated by the arylhydrocarbon receptor (AhR). We hypothesized that TCDD could also act indirectly, by increasing the activity of cytochrome P450 1A1 (CYP1A1)...

Cytochrome CYP1A1 gene expression, induced by polycyclic aromatic hydrocarbons and dioxins, eg. 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), is regulated mainly at the level of transcription. Inducible activation of the CYP1A1 promotor is mediated by a ligand-dependent transcription factor dimer complex including the aryl hydrocarbon receptor (AHR) and the AHR nuclear translocator (ARNT) protein...

Objective : Infertility is the inability of a couple to conceive after one and half year of unprotected sex.Infertility is an inability of a person to reproduce, in its normal state or condition. Male infertility is considered as a major problem all over the world. The aim of this study was to investigate the association of the CYP1A1 polymorphisms with idiopathic non-obstructive azoospermia in...

AIMS CYP1A1 and CYP1B1, members of the cytochrome P450 protein family, are regulated by fluid shear stress. This study describes the effects of duration, magnitude and pattern of shear stress on CYP1A1 and CYP1B1 expressions in human endothelial cells, towards the goal of understanding the role(s) of these genes in pro-atherogenic or anti-atherogenic endothelial cell functions. METHODS AND RE...

Abstract Bone loss due to smoking represents a major risk factor for fractures and bone osteoporosis. Signaling through the aryl hydrocarbon receptor (AhR) its ligands contributes both homeostasis inflammatory diseases. It remains unclear whether same AhR signaling axis affects temporomandibular joint (TMJ). The aim of this study was investigate possible mechanisms which mediate in TMJ smoking....

Cytochrome P450 1A1 (CYP1A1), like many monooxygenases, can produce reactive oxygen species during its catalytic cycle. Apart from the well-characterized xenobiotic-elicited induction, the regulatory mechanisms involved in the control of the steady-state activity of CYP1A1 have not been elucidated. We show here that reactive oxygen species generated from the activity of CYP1A1 limit the levels ...

Regulation of the CYP1A1 gene has been shown to involve the aryl hydrocarbon receptor and the CYP1A1 gene expression is induced by AhR ligands. Primaquine is an antimalarial agent that does not exhibit the structural properties of a classical AhR ligand. We have evaluated the mechanisms by which this compound induces CYP1A1 expression using rat hepatoma H4IIE cells and V79 cells stably expressi...