Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Cytochrome P4501A1 genotypes and smoking- and hypertension-related ischemic stroke risk
Date
2012-10-30
Author
Demirdöğen, B. Can
Adali, A.Ç.
Bek, S.
Demirkaya, Ş.
Adalı, Orhan
Metadata
Show full item record
Item Usage Stats
247
views
0
downloads
Cite This
This study aimed to determine whether the coding (A4889G) and noncoding region (T6235C) polymorphisms of the gene coding for cytochrome P4501A1 (CYP1A1), a xenobiotic-metabolizing enzyme responsible for the metabolism of carcinogenic polycyclic aromatic hydrocarbons, are involved in the pathogenesis of ischemic stroke in Turkish population. Study group consisted of 226 ischemic stroke patients and 113 controls. Genotypes were attained by allele-specific polymerase chain reaction (PCR) for A4889G and PCR/restriction fragment length polymorphism analysis for T6235C. Frequency of 6235C allele was significantly lower in patients (0.151) compared with controls (0.226, P = 0.015). Prevalence of hypertension and hypertension-associated ischemic stroke risk was lower for 6235C allele carriers. This allele decreased ischemic stroke risk twofold (adjusted odds ratio = 0.48, P = 0.005). There was almost no difference in 4889G allele frequencies in patients (0.445) and controls (0.425). However, prevalence of hypertension was lower in 4889G allele carriers when compared with the wild-type genotypes. In addition, risk of ischemic stroke for smoker and hypertensive individuals was lower when they have at least one 4889G allele. The present study demonstrated that CYP1A1 genetic variants contribute to interindividual variability in smoking- and hypertension-induced ischemic stroke risk.
Subject Keywords
Cytochrome
,
Genetic polymorphism
,
Smoking
,
İschemic stroke
,
Turkish population
,
Polymerase chain reaction/restriction fragment length polymorphism
URI
https://hdl.handle.net/11511/28339
Journal
Human & Experimental Toxicology
DOI
https://doi.org/10.1177/0960327112464667
Collections
Department of Biology, Article
Suggestions
OpenMETU
Core
Cytochrome P4502B-type protein from feral leaping mullet (Liza Saliens) liver microsomes: its isolation and biochemical and immunological characterization
Bozcaarmutlu, Azra; Arınç, Emel; Department of Biochemistry (2002)
Cytochrome P450s constitute a superfamily of hemoproteins that play important roles in oxidative metabolism of endogenous and exogenous compounds, and serve as catalysts that are significant in numerous and diverse biological pathways. The extent to which these various pathways or functions occur in different animal groups depend on a large degree on the participation of different P450 proteins present, their catalytic function and their regulation. Cytochrome P4502B subfamily is generally associated with d...
Cytochrome P4501A and associated mixed-function oxidase induction in fish as a biomarker for toxic carcinogenic pollutants in the aquatic environment
Arinc, E; Sen, A; Bozcaarmutlu, A (Walter de Gruyter GmbH, 2000-06-01)
Polycyclic aromatic hydrocarbons (PAHs), dioxins, dibenzofurans, and polychlorinated biphenyls (PCBs) present in polluted environment induce cytochrome P4501A (CYP1A) isozyme in fish, which in turn results in a marked increased production of carcinogenic metabolites from PAHs. The induction of hepatic CYP1A in fish by certain classes of chemicals has been suggested as an early warning system, a "most sensitive biological response" for assessing environmental contamination conditions. This has implications f...
Thermostability and regulation of Clostridium thermocellum L-lactate dehydrogenase expressed in Escherichia coli
Assa, P; Ozkan, M; Özcengiz, Gülay (2005-01-01)
In this study, L-lactate dehydrogenase (L-LDH) of Clostridium thermocellum previously cloned aid expressed in Escherichia coli FMJ39 was partially purified and characterised. Optimum temperature and pH of the enzyme were found as 50 degrees C and 7.5, respectively. Different concentrations of Mn2+ did not affect the enzyme activity. Addition of 20-30 mM Mg2+, or the other hand, increased the LDH activity by about 10%. Relatively high concentrations of NaCl (2 M), fructose-1,6-diphosphate (FDP, 5 mM), ATP (1...
Site - Specific Mutations of Conserved C - Terminal Residues in Aminoglycoside 3'-Phosphotransferase II [APH(3')-II]: Phenotypic and Structural Analysis of the Mutant Enzymes
Kocabıyık, Semra (1992-06-01)
In order to test the biological importance of amino acids in the C-terminal quarter of aminoglycoside 3′-phosphotransferase II enzyme, seven of the highly conserved residues in this region, His-188, Asp-190, Asp-208, Gly-210, Arg-211, Asp-216 and Asp-220, were changed via site-directed mutagenesis. The phenotype of each mutant was compared to wildtype in terms of antibiotic susceptibilities and enzymatic activities. All of the substitutions either abolished or significantly reduced the resistance of the res...
ANTIOXIDANT RESPONSES OF PEANUT (ARACHIS HYPOGAEA L.) SEEDLINGS TO PROLONGED SALT-INDUCED STRESS
KAVAS, MUSA; Akca, Oya Ercan; Akcay, Ufuk Celikkol; Peksel, Begum; Eroğlu, Seçkin; Öktem, Hüseyin Avni; Yucel, Meral (2015-01-01)
In this study, the effects of long-term NaCl treatment were investigated in two cultivars of peanut designated as drought-resistant and drought-sensitive. Growth parameters, changes in the concentrations of MDA, H2O2 and proline, and the activities of antioxidant enzymes were determined under salinity stress. Growth parameters indicated the superiority of cv. Florispan to cv. Gazipasa under milder salinity stress treatment. However, comparative analysis of the two cultivars showed that MDA, H2O2, ion leakag...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
B. C. Demirdöğen, A. Ç. Adali, S. Bek, Ş. Demirkaya, and O. Adalı, “Cytochrome P4501A1 genotypes and smoking- and hypertension-related ischemic stroke risk,”
Human & Experimental Toxicology
, pp. 483–491, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28339.