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Burjanivova T, Lukacova E, Lucansky V, Samec M, Podlesniy P, Kolkova Z, Reizigova L, Grendar M, Turyova E, Holubekova V, Malicherova B, Nosal V, Kasubova I, Dusenka R, Osinova D, Hosalova Matisova J, Dvorska D, Brany D, Dankova Z, Novakova E, Calkovska A, Halasova E. Sensitive SARS-CoV-2 detection, air travel Covid-19 testing, variant determination and fast direct PCR detection, using ddPCR and RT-qPCR methods. Acta Virol 2023; 67:3-12. [PMID: 36876506 DOI: 10.4149/av_2023_101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) monitoring in air traffic is important in the prevention of the virus spreading from abroad. The gold standard for SARS-CoV-2 detection is RT-qPCR; however, for early and low viral load detection, a much more sensitive method, such as droplet digital PCR (ddPCR), is required. Our first step was to developed both, ddPCR and RT-qPCR methods, for sensitive SARS-CoV-2 detection. Analysis of ten swab/saliva samples of five Covid-19 patients in different stages of disease showed positivity in 6/10 samples with RT-qPCR and 9/10 with ddPCR. We also used our RT-qPCR method for SARS-CoV-2 detection without the need of RNA extraction, obtaining results in 90-120 minutes. We analyzed 116 self-collected saliva samples from passengers and airport staff arriving from abroad. All samples were negative by RT-qPCR, while 1 was positive, using ddPCR. Lastly, we developed ddPCR assays for SARS-CoV-2 variants identification (alpha, beta, gamma, delta/kappa) that are more economically advantageous when compared to NGS. Our findings demonstrated that saliva samples can be stored at ambient temperature, as we did not observe any significant difference between a fresh sample and the same sample after 24 hours (p = 0.23), hence, saliva collection is the optimal route for sampling airplane passengers. Our results also showed that droplet digital PCR is a more suitable method for detecting virus from saliva, compared to RT-qPCR. Keywords: COVID-19; RT-PCR; ddPCR; SARS-CoV-2; nasopharyngeal swab; saliva.
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Ruzinak R, Bittsansky M, Martinikova M, Nosal V, Kantorova E, Ballova J, Turcanova Koprusakova M, Hnilicova P, Grendar M, Dusenka R, Kolarovszki B, Zelenak K, Kurca E, Sivak S. Proton magnetic resonance spectroscopy changes in the brainstem in patients after mild traumatic brain injury with loss of consciousness. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2021; 166:84-90. [PMID: 33976431 DOI: 10.5507/bp.2021.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 04/26/2021] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Loss of consciousness (LOC) is used as a diagnostic feature of mild traumatic brain injury (MTBI). However, only 10% of concussions result in LOC. There are only a limited number of in-vivo studies dealing with unconsciousness and structural and functional integrity of the brainstem in patients with MTBI. The aim of our pilot study was to assess the sensitivity of proton magnetic resonance spectroscopy (1H-MRS) to detect metabolic changes in the brainstem in patients after MTBI with unconscioussness. METHODS Twenty-four patients (12 with LOC, and 12 without LOC) within 3 days of MTBI and 19 healthy controls were examined. All subjects underwent single-voxel 1H-MRS examination of the upper brainstem. Spectra were evaluated using LCModel software. Ratios of total N-acetylaspartate (tNAA), total choline-containing compounds (tCho) and glutamate plus glutamine (Glx) to total creatine (tCre) were used for calculations. RESULTS We found a significant decrease in tNAA/tCre and tCho/tCre ratios in the patient group with LOC when compared with the control group of healthy volunteers (P=0.002 and P=0.041, respectively), and a significant decrease in the tNAA/tCre ratio in the LOC group when compared with patients without LOC (P=0.04). Other metabolite ratios in the brainstem did not show any significant group differences. CONCLUSION Our findings indicate that decrease of tNAA/tCre ratio in the upper brainstem using single-voxel 1H-MRS may provide a potential biomarker for MTBI associated with LOC.
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Affiliation(s)
- Robert Ruzinak
- Clinic of Neurology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Slovak Republic
| | - Michal Bittsansky
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratilava, Slovak Republic
| | - Martina Martinikova
- Department of Neurology, F.D. Roosevelt Hospital, Banska Bystrica, Slovak Republic
| | - Vladimir Nosal
- Clinic of Neurology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Slovak Republic
| | - Ema Kantorova
- Clinic of Neurology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Slovak Republic
| | - Jana Ballova
- Clinic of Neurology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Slovak Republic
| | - Monika Turcanova Koprusakova
- Clinic of Neurology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Slovak Republic
| | - Petra Hnilicova
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratilava, Slovak Republic
| | - Marian Grendar
- Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratilava, Slovak Republic
| | | | - Branislav Kolarovszki
- Clinic of Neurosurgery, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Slovak Republic
| | - Kamil Zelenak
- Clinic of Radiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Slovak Republic
| | - Egon Kurca
- Clinic of Neurology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Slovak Republic
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Sivonova MK, Jurecekova J, Kaplan P, Hives M, Grendar M, Tomascova A, Dusenka R, Drobkova H, Evin D, Kliment J. Association of MDM2 T309G (rs2279744) Polymorphism and Expression Changes With Risk of Prostate Cancer in the Slovak Population. Anticancer Res 2020; 40:6257-6264. [PMID: 33109563 DOI: 10.21873/anticanres.14646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM The aim of this study was to evaluate the relationship between MDM2 T309G polymorphism and prostate cancer risk in the Slovak population and the association of this polymorphism with MDM2 expression and clinicopathological features. MATERIALS AND METHODS The MDM2 T309G polymorphism was determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis in 506 prostate cancer patients and 592 controls. Quantitative real-time (RT)-PCR and western blot analysis were applied to examine MDM2 expression in 47 prostate cancer tissues and 43 benign prostatic hyperplasia (BPH) tissues. RESULTS A decreased risk of prostate cancer in men carrying the GG genotype in comparison with the TT genotype was found. A decrease in the relative MDM2 mRNA and protein levels was found in prostate cancer tissues among patients with the MDM2 GG genotype. CONCLUSION There is a potentially protective effect of the MDM2 GG genotype on the risk of prostate cancer in the Slovak male population.
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Affiliation(s)
- Monika Kmetova Sivonova
- Department of Medical Biochemistry, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovak Republic
| | - Jana Jurecekova
- Department of Medical Biochemistry, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovak Republic
| | - Peter Kaplan
- Department of Medical Biochemistry, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovak Republic
| | - Mark Hives
- Department of Medical Biochemistry, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovak Republic
| | - Marian Grendar
- Biomedical Center Martin, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovak Republic
| | - Anna Tomascova
- Biomedical Center Martin, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovak Republic
| | - Robert Dusenka
- Department of Urology, Comenius University in Bratislava, Jessenius Faculty of Medicine and UHM, Martin, Slovak Republic
| | - Henrieta Drobkova
- Biomedical Center Martin, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovak Republic
| | - Daniel Evin
- Department of Medical Biochemistry, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovak Republic.,Department of Nuclear Medicine, Comenius University in Bratislava, Jessenius Faculty of Medicine and UHM, Martin, Slovak Republic
| | - Jan Kliment
- Department of Urology, Comenius University in Bratislava, Jessenius Faculty of Medicine and UHM, Martin, Slovak Republic
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Burjanivova T, Malicherova B, Grendar M, Minarikova E, Dusenka R, Vanova B, Bobrovska M, Pecova T, Homola I, Lasabova Z, Plank L. Detection of BRAFV600E Mutation in Melanoma Patients by Digital PCR of Circulating DNA. Genet Test Mol Biomarkers 2019; 23:241-245. [PMID: 30676087 DOI: 10.1089/gtmb.2018.0193] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS About 50% of melanomas have the BRAFV600E mutation. This mutation is an attractive therapeutic target. The aims of our study were to detect BRAFV600E mutations within circulating cell-free DNA in plasma ("liquid biopsy") by a droplet digital PCR (ddPCR) method, and to investigate how well the Breslow-Clark score can be predicted by ddPCR. MATERIALS AND METHODS We analyzed 113 patients with malignant melanoma. ddPCR was performed using the QX200 system (BIO-RAD®, Hercules). All samples were tested in duplicate. Besides the results of the liquid biopsy, we have collected data on gender and age of the patients, as well as the mitotic activity of the tumor; the tumor subtype and localization, and the Breslow-Clark score. The limit of detection (LoD) was determined by the method of Tzonev. The LoD was found to be five events per well. RESULTS The BRAFV600E mutation was detected in 37 of 113 samples. A moderate predictive accuracy of the Breslow-Clark score can be attained with the mitotic activity and the type of melanoma as the most important predictors. CONCLUSION Our results show that ddPCR is a highly sensitive method and could be used for a routine laboratory detection of the BRAFV600E mutation as well as for follow-up monitoring to determine the treatment response in patients with malignant melanomas.
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Affiliation(s)
- Tatiana Burjanivova
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,2 Department of Molecular Biology, and Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Bibiana Malicherova
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,2 Department of Molecular Biology, and Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Marian Grendar
- 3 Bioinformatic Unit, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Eva Minarikova
- 4 Clinic of Dermatovenerology, Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Robert Dusenka
- 5 Department of Urology, Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Barbora Vanova
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,2 Department of Molecular Biology, and Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Martina Bobrovska
- 6 Department of Pathological Anatomy, and Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Tatiana Pecova
- 4 Clinic of Dermatovenerology, Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Igor Homola
- 7 Department of Plastic Surgery, Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
| | - Zora Lasabova
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,2 Department of Molecular Biology, and Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia
| | - Lukas Plank
- 1 Division of Oncology, Biomedical Center Martin JFM CU, Commenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Martin, Slovakia.,6 Department of Pathological Anatomy, and Jessenius Faculty of Medicine and University Hospital in Martin, Martin, Slovakia
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Luptak J, Kocmalova M, Franova S, Sutovsky J, Grendar M, Svihra J, Kliment J, Dusenka R, Sutovska M. Involvement of calcium regulating ion channels in contractility of human isolated urinary bladder. Gen Physiol Biophys 2018; 37:391-398. [PMID: 29956670 DOI: 10.4149/gpb_2017064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/04/2017] [Indexed: 11/08/2022]
Abstract
This study specified the role of several key calcium-operating ion channels in contraction/relaxation of human detrusor muscle as possible target for overactive bladder (OAB) treatment. Detrusor samples, obtained from 18 males (average age 61.5 ± 5.9 years), were investigated by organ tissue bath method with following agents: diltiazem for L-type voltage-gated calcium channels; 3-fluropyridine-4-carboxylic acid (FPCA) for Orai-STIM channels; SKF 96365-hydrochloride for transient receptor potential (TRP) channels, T-type channels and Orai-STIM channels; 2- aminoethoxydiphenyl borate (2-APB) for inositol-triphosphate receptors (IP3Rs) and Orai-STIM channels. Oxybutynin and mirabegron were tested under the same conditions as controls. Mirabegron, 2-APB and FPCA exhibited the best suppressive effect on carbachol-induced detrusor contractility. As expressed by area under the contractile curve (AUCC), 2-APB, FPCA and mirabegron have similar AUCC: 1.79, 1.73, 1.73. The highest AUCC was 3.64 for diltiazem+SKF, followed by 3.21 for diltiazem, 3.16 for SKF and 2.94 for oxybutynin. The lowest median amplitude and contraction variability is for 2-APB followed by mirabegron and FPCA. There were significant differences between: 2-APB/FPCA vs.: ditiazem, diltiazem+SKF and SKF. Summary of results suggested the principal role of IP3Rs, Orai-STIM coupling and large-conductance calcium-activated potassium channels in detrusor contraction and pointed on Orai-STIM channels as possible targets for OAB pharmacotherapy.
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Affiliation(s)
- Jan Luptak
- Urology Clinic, Jessenius Faculty of Medicine, Martin University Hospital, Comenius University, Martin, Slovakia.
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Dluha J, Sivak S, Kurca E, Dusenka R, Kalmarova K, Turcanova Koprusakova M, Kantorova E, Nosal V. The safety and efficacy of Heparin and Nadroparin compared to placebo in acute ischemic stroke - pilot study. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2016; 160:543-548. [DOI: 10.5507/bp.2016.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 08/03/2016] [Indexed: 11/23/2022] Open
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Dusenkova S, Ru F, Surdenikova L, Nassenstein C, Hatok J, Dusenka R, Banovcin P, Kliment J, Tatar M, Kollarik M. The expression profile of acid-sensing ion channel (ASIC) subunits ASIC1a, ASIC1b, ASIC2a, ASIC2b, and ASIC3 in the esophageal vagal afferent nerve subtypes. Am J Physiol Gastrointest Liver Physiol 2014; 307:G922-30. [PMID: 25190475 PMCID: PMC4216991 DOI: 10.1152/ajpgi.00129.2014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Acid-sensing ion channels (ASICs) have been implicated in esophageal acid sensing and mechanotransduction. However, insufficient knowledge of ASIC subunit expression profile in esophageal afferent nerves hampers the understanding of their role. This knowledge is essential because ASIC subunits form heteromultimeric channels with distinct functional properties. We hypothesized that the esophageal putative nociceptive C-fiber nerves (transient receptor potential vanilloid 1, TRPV1-positive) express multiple ASIC subunits and that the ASIC expression profile differs between the nodose TRPV1-positive subtype developmentally derived from placodes and the jugular TRPV1-positive subtype derived from neural crest. We performed single cell RT-PCR on the vagal afferent neurons retrogradely labeled from the esophagus. In the guinea pig, nearly all (90%-95%) nodose and jugular esophageal TRPV1-positive neurons expressed ASICs, most often in a combination (65-75%). ASIC1, ASIC2, and ASIC3 were expressed in 65-75%, 55-70%, and 70%, respectively, of both nodose and jugular TRPV1-positive neurons. The ASIC1 splice variants ASIC1a and ASIC1b and the ASIC2 splice variant ASIC2b were similarly expressed in both nodose and jugular TRPV1-positive neurons. However, ASIC2a was found exclusively in the nodose neurons. In contrast to guinea pig, ASIC3 was almost absent from the mouse vagal esophageal TRPV1-positive neurons. However, ASIC3 was similarly expressed in the nonnociceptive TRPV1-negative (tension mechanoreceptors) neurons in both species. We conclude that the majority of esophageal vagal nociceptive neurons express multiple ASIC subunits. The placode-derived nodose neurons selectively express ASIC2a, known to substantially reduce acid sensitivity of ASIC heteromultimers. ASIC3 is expressed in the guinea pig but not in the mouse vagal esophageal TRPV1-positive neurons, indicating species differences in ASIC expression.
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Affiliation(s)
- Svetlana Dusenkova
- 1Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland; ,2Department of Pathophysiology, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia;
| | - Fei Ru
- 1Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland;
| | - Lenka Surdenikova
- 2Department of Pathophysiology, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia;
| | - Christina Nassenstein
- 1Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland; ,6Institute of Anatomy and Cell Biology-Cardiopulmonary Neurobiology, Justus-Liebig-University, Giessen, Germany
| | - Jozef Hatok
- 3Department of Biochemistry, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia;
| | - Robert Dusenka
- 3Department of Biochemistry, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia; ,4Department of Urology, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia;
| | - Peter Banovcin
- 5Department of Gastroenterology, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia;
| | - Jan Kliment
- 4Department of Urology, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia;
| | - Milos Tatar
- 2Department of Pathophysiology, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia;
| | - Marian Kollarik
- Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Pathophysiology, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia;
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Sivonova MK, Dobrota D, Matakova T, Dusenka R, Grobarcikova S, Habala V, Salagovic J, Tajtakova M, Pidanicova A, Valansky L, Lachvacs L, Kliment J, Nagy V, Kliment J. Microsomal epoxide hydrolase polymorphisms, cigarette smoking and prostate cancer risk in the Slovak population. Neoplasma 2012; 59:79-84. [PMID: 22103900 DOI: 10.4149/neo_2012_010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Polymorphisms in tobacco carcinogen metabolizing enzymes may generate interindividual variations towards the risk of developing prostate cancer. One of these enzymes is microsomal epoxide hydrolase (EPHX1) which metabolizes polycyclic aromatic hydrocarbons, or PAH, carcinogens found in cigarette smoke. The activity of this enzyme is affected by two polymorphisms, a substitution of Tyr113 by His in exon 3 and a substitution of His139 by Arg in exon 4. The aim of this study was to use a population-based case-control study to investigate whether or not such genetic polymorphisms in EPHX1 gene can modify the relationship between smoking status and the risk of developing prostate cancer. We used restriction fragment length polymorphism, or PCR-RFLP to determine EPHX1 genotypes in subjects comprising 194 patients with histologically verified prostate cancer and 305 healthy individuals as control. We found no overall association between prostate cancer risk and functional polymorphisms of EPHX1 gene in exon 3 and exon 4. We further analysed the association between the EPHX1 genotypes and smoking. Smokers carrying the exon 3 Tyr/Tyr and Tyr/His genotypes were at no significant risk compared to non-smokers with the "rapid" Tyr/Tyr genotype. By contrast, a significant interaction of smoking and the exon 4 polymorphism was present.
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Affiliation(s)
- M Kmetov Sivonova
- Department of Medical Biochemistry, Comenius University, Bratislava, Slovakia.
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