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Azarova I, Polonikov A, Klyosova E. Molecular Genetics of Abnormal Redox Homeostasis in Type 2 Diabetes Mellitus. Int J Mol Sci 2023; 24:ijms24054738. [PMID: 36902173 PMCID: PMC10003739 DOI: 10.3390/ijms24054738] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/20/2023] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
Numerous studies have shown that oxidative stress resulting from an imbalance between the production of free radicals and their neutralization by antioxidant enzymes is one of the major pathological disorders underlying the development and progression of type 2 diabetes (T2D). The present review summarizes the current state of the art advances in understanding the role of abnormal redox homeostasis in the molecular mechanisms of T2D and provides comprehensive information on the characteristics and biological functions of antioxidant and oxidative enzymes, as well as discusses genetic studies conducted so far in order to investigate the contribution of polymorphisms in genes encoding redox state-regulating enzymes to the disease pathogenesis.
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Affiliation(s)
- Iuliia Azarova
- Department of Biological Chemistry, Kursk State Medical University, 3 Karl Marx Street, 305041 Kursk, Russia
- Laboratory of Biochemical Genetics and Metabolomics, Research Institute for Genetic and Molecular Epidemiology, Kursk State Medical University, 18 Yamskaya Street, 305041 Kursk, Russia
| | - Alexey Polonikov
- Laboratory of Statistical Genetics and Bioinformatics, Research Institute for Genetic and Molecular Epidemiology, Kursk State Medical University, 18 Yamskaya Street, 305041 Kursk, Russia
- Department of Biology, Medical Genetics and Ecology, Kursk State Medical University, 3 Karl Marx Street, 305041 Kursk, Russia
- Correspondence:
| | - Elena Klyosova
- Laboratory of Biochemical Genetics and Metabolomics, Research Institute for Genetic and Molecular Epidemiology, Kursk State Medical University, 18 Yamskaya Street, 305041 Kursk, Russia
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Maharani N, Soetadji A, Utari A, Naka I, Ohashi J, Mexitalia M. Cytochrome b-245 Alpha Chain Gene Variants and Arterial Function in Indonesian Short Stature Children. Cardiol Res 2022; 12:351-357. [PMID: 34970365 PMCID: PMC8683098 DOI: 10.14740/cr1314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 10/05/2021] [Indexed: 11/11/2022] Open
Abstract
Background The association between short stature, undernutrition and the risk to cardiovascular disease has been clinically established. Genetic factor, particularly the variants in cytochrome b-245 alpha chain (CYBA) gene, which alter the formation of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase level, might affect arterial function. This study aimed to observe the association between single nucleotide variants (SNVs) of the CYBA gene and the arterial function of short stature children to understand the reason why some people with short stature develop cardiovascular disease. Methods A total of 142 genomic deoxyribonucleic acid (DNA) samples have been collected from short stature children in Brebes, Central Java, Indonesia. Four common single-nucleotide polymorphisms (SNPs): C242T (rs4673), A640G (rs1049255), -930A>G (rs9932581) and *49A>G (rs7195830) in the CYBA gene were examined using TaqMan allelic discrimination assay. The arterial function was measured using transthoracic echocardiography and described as aortic stiffness and distensibility index. Statistical analysis was done to find a significant difference in arterial function between genotypes of each SNV. Results A P-value of < 0.05 was considered significant. In rs9932581 (-930A>G) of CYBA gene, the subjects with GG genotype were found to have significantly lower arterial stiffness and higher distensibility compared to AA and AG genotypes. No significant difference was found in the other SNVs. Conclusion The GG genotype in rs9932581 of the CYBA gene might have a protective effect on cardiovascular disease in short stature children.
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Affiliation(s)
- Nani Maharani
- Center for Biomedical Research, Faculty of Medicine, Universitas Diponegoro, Semarang, Indonesia.,Department of Pharmacology and Therapy, Faculty of Medicine, Universitas Diponegoro, Semarang, Indonesia
| | - Anindita Soetadji
- Department of Pediatrics, Faculty of Medicine, Universitas Diponegoro/Dr Kariadi Hospital, Semarang, Indonesia
| | - Agustini Utari
- Center for Biomedical Research, Faculty of Medicine, Universitas Diponegoro, Semarang, Indonesia.,Department of Pediatrics, Faculty of Medicine, Universitas Diponegoro/Dr Kariadi Hospital, Semarang, Indonesia
| | - Izumi Naka
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Jun Ohashi
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Maria Mexitalia
- Department of Pediatrics, Faculty of Medicine, Universitas Diponegoro/Dr Kariadi Hospital, Semarang, Indonesia
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Masnadi Shirazi K, Sotoudeh S, Masnadi Shirazi A, Moaddab SY, Nourpanah Z, Nikniaz Z. Effect of N-acetylcysteine on remission maintenance in patients with ulcerative colitis: A randomized, double-blind controlled clinical trial. Clin Res Hepatol Gastroenterol 2021; 45:101532. [PMID: 33067169 DOI: 10.1016/j.clinre.2020.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/02/2020] [Accepted: 08/25/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND The use of antioxidant agents is suggested as a complementary therapy in UC patients for the prevention of flares. Considering the potent antioxidant activity of N-acetylcysteine (NAC), in the present study we aimed to assess the effect of this supplement on remission maintenance in patients with ulcerative colitis (UC). METHODS In the present double-blind randomized controlled clinical trial, 168 volunteer UC patients who were on high dose corticosteroid and Mesalamine for flare-up management, were recruited. The patients received 800 mg NAC or placebo for 16 weeks. Simultaneously, the prednisolone dose was tapered. The patients were followed up six more weeks post-intervention. The primary efficacy of the treatment was remaining in remission. The secondary outcomes were the endoscopic relapse, serum level of hs-CRP, hemoglobin, and fecal calprotectin level. RESULTS During 22 weeks follow up, 25 patients experienced relapses, six of them were in the NAC group and 19 of them were in the placebo group. There was a significant difference between the NAC and placebo groups regarding the relapse-free period (P = 0.007). Compared with the NAC group, significantly more patients in the placebo group had an endoscopic relapse (p < 0.001). At the end of the intervention period (16 weeks) and 6 weeks post-intervention, the mean fecal calprotectin, serum erythrocyte sedimentation rate, and hs-CRP levels were significantly lower in the NAC group compared with the placebo group (p < 0.05). CONCLUSION The findings indicated that NAC had a significantly more positive effect on the maintenance of remission compared with placebo in UC patients that were in the steroid-tapering phase of therapy.
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Affiliation(s)
- Kourosh Masnadi Shirazi
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Simin Sotoudeh
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Seyyed-Yaghoub Moaddab
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zahra Nourpanah
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zeinab Nikniaz
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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Haplotype Analysis of Candidate Genes Involved in Inflammation and Oxidative Stress and the Susceptibility to Preeclampsia. J Immunol Res 2020; 2020:4683798. [PMID: 32185238 PMCID: PMC7061132 DOI: 10.1155/2020/4683798] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 12/26/2019] [Accepted: 01/28/2020] [Indexed: 02/01/2023] Open
Abstract
Unbalanced inflammatory reactions and oxidative stress are inseparably interconnected, and both may play crucial roles in the pathophysiological mechanisms of preeclampsia (PE). In the published previous studies, we have genotyped for SNPs that related to inflammation (rs2227485, rs153109, rs17855750, rs2027432, rs2275913, rs763780, rs4819554, and rs13015714) and oxidative stress (rs1695, rs4680, rs1800566, rs4807542, rs713041, rs7579, rs230813, rs1004467, rs3824755, and rs9932581) to investigate whether these polymorphisms were associated with susceptibility to PE in a Chinese Han population. In this present study, we collected these data of experimental and clinical from above studies for haplotype analysis of inflammation-related SNPs in 631 PE patients and 720 normal pregnancy and oxidative stress-related SNPs in 342 PE patients and 457 normal pregnancies for susceptibility to PE. The data of genotype distribution and allele frequency comparisons after correction for multiple comparisons (P/8 or P/10) showed 2 among the 8 candidate inflammation-related SNPs have significant differences (rs2027432 genotype χ2 = 407.377, p < 0.001, p < 0.00625). Moreover, the minor alleles of rs2027432 T (minor allele χ2 = 450.923, p < 0.001, p < 0.00625; OR = 21.439, 95%CI = 15.181‐30.278) and rs4819554 G (minor allele χ2 = 163.465, p < 0.001, p < 0.00625; OR = 5.814, 95%CI = 4.380‐7.719) were confirmed as risk allele of PE, respectively. Our analysis revealed rs2027432 (TT) of NLRP3 and rs4819554 (GG) of IL-17RA are risk factors for PE. However, no significant difference was found at the oxidative stress-related SNPs. In the candidate loci for oxidative stress, we also identified 3 SNP matches (rs4807542 and rs713041, rs230813 and rs75799, rs1004467 and rs3824755) that had high linkage disequilibrium (LD) with each other and were selected as a block (r2 = 0.98, r2 = 0.97, r2 = 0.97, r2 > 0.9), and the GT and GC haplotypes of rs4807542 and rs713041 in GPX4 showed significant differences between the PE and control groups (χ2 = 5.143, p = 0.0233, p < 0.05; χ2 = 6.373, p = 0.0116, p < 0.05). So, we inferred that polymorphisms of NLRP3 rs2027432 and IL-17RA rs4819554, which are related to inflammation, and the rs713041 variant of GPX4, which is related to oxidative stress, were associated with susceptibility to PE. The GT and GC haplotypes of rs4807542 and rs713041 in GPX4 may increase the risk of PE in the Chinese Han population.
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Yuan B, Yuan W, Wen X, Li C, Gao L, Li B, Wang D, Cui L, Li Y. Association of single nucleotide polymorphisms in the CYBA gene with coal workers' pneumoconiosis in the Han Chinese population. Inhal Toxicol 2019; 30:492-497. [PMID: 30654669 DOI: 10.1080/08958378.2018.1558315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Coal workers' pneumoconiosis (CWP) is caused by long-term exposure to inhaled coal dust; it is likely influenced by the interaction between environmental factors and multiple susceptibility genes, such as the CYBA (cytochrome b-245α polypeptide) gene that has recently been identified to be involved in the genetic susceptibility for several pulmonary diseases. The aim of this case-control study was to explore the association between CYBA gene polymorphisms and the development of CWP in coal miners belonging to the Han ethnic group in China. Single nucleotide polymorphisms (SNPs) rs7195830, rs13306296, rs4673, rs9932581, and rs16966671 of the CYBA gene were analyzed in CWP patients (n = 652) and dust-exposed control subjects (n = 648) using the matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS) on the Sequenom MassARRAY® platform (Sequenom, San Diego, CA, USA). Results from the present study showed a strong allele association between CWP patients and the CYBA SNP rs7195830 polymorphism (p < .001, OR = 1.550). Using the additive and the dominant model, the CYBA SNP rs7195830 polymorphism also showed significant associations with CWP patients (p < .001, OR = 1.621; p = .003, OR = 1.711, respectively). No statistically significant difference was demonstrated in either the allele or genotype frequencies of the other four examined SNPs (rs13306296, rs4673, rs9932581, and rs16966671) between the CWP group and dust-exposed control group (all p > .05). The present study is the first to have demonstrated an association between CYBA (rs7195830) polymorphism and the risk of developing CWP in subjects belong to the Han ethnic group in China and provides further clues for research into the pathogenesis of CWP.
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Affiliation(s)
- Baojun Yuan
- a Department of Clinical Laboratory , Kai Luan General Hospital , Tangshan , Hebei , China
| | - Wei Yuan
- b Department of Rheumatology and Clinical Immunology , Kai Luan General Hospital , Tangsha , Hebei , China
| | - Xiaoting Wen
- c Department of Rheumatology and Clinical Immunology , Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
| | - Chao Li
- a Department of Clinical Laboratory , Kai Luan General Hospital , Tangshan , Hebei , China
| | - Lichang Gao
- a Department of Clinical Laboratory , Kai Luan General Hospital , Tangshan , Hebei , China
| | - Baolin Li
- a Department of Clinical Laboratory , Kai Luan General Hospital , Tangshan , Hebei , China
| | - Dongmei Wang
- a Department of Clinical Laboratory , Kai Luan General Hospital , Tangshan , Hebei , China
| | - Liufu Cui
- b Department of Rheumatology and Clinical Immunology , Kai Luan General Hospital , Tangsha , Hebei , China
| | - Yongzhe Li
- c Department of Rheumatology and Clinical Immunology , Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
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Tupurani MA, Padala C, Puranam K, Galimudi RK, Kupsal K, Shyamala N, Gantala S, Kummari R, Chinta SK, Hanumanth SR. Association of CYBA gene (-930 A/G and 242 C/T) polymorphisms with oxidative stress in breast cancer: a case-control study. PeerJ 2018; 6:e5509. [PMID: 30310735 PMCID: PMC6174867 DOI: 10.7717/peerj.5509] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 08/01/2018] [Indexed: 12/11/2022] Open
Abstract
Background Oxidative stress (OS) is a key characteristic feature in cancer initiation and progression. Among multiple cancers, NADPH oxidase (NOX) dependent free radical production is implicated in oxidative stress. P22phox, a subunit of NADPH oxidase encoded by the CYBA gene has functional polymorphisms associated with various complex diseases. The present study was aimed to examine the importance and association of the functional polymorphisms of CYBA gene (-930 A/G and 242 C/T) with the oxidative stress in breast cancer (BC) development and progression. Materials and Methods We have performed a case-control study on 300 breast cancer patients and 300 healthy individuals as controls to examine the role of CYBA gene -930 A/G and 242 C/T single nucleotide polymorphisms (SNPs) using As-PCR and PCR-RFLP assays and its association with OS as measured by plasma MDA levels. Linkage disequilibrium (LD) plots were generated using Haploviewtool and Multifactor dimensionality reduction (MDR) analysis was applied to assess high-order interactions between the SNPs. The Insilco analysis has been performed to predict the effect of SNPs on the gene regulation using online tools. Results We have found that genotype frequencies of CYBA gene -930 A/G and 242C/T polymorphism were significantly different between controls and BC patients (p < 0.05). The haplotype combination -930G/242C and -930G/242T were associated with 1.44 & 1.56 folds increased risk for breast cancer respectively. Further, the MDA levels were higher in the patients carrying -930G/242C and -930G/242T haplotype (p < 0.001). Our results have been substantiated by Insilco analysis. Conclusion Results of the present study suggest that GG genotype of -930 A/G polymorphism, -930G/242C and -930G/242T haplotypes of CYBA gene polymorphisms have shown association with higher MDA levels in breast cancer patients, signify that elevated oxidative stress might aid in increased risk for breast cancer initiation and progression.
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Affiliation(s)
- Mohini A Tupurani
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
| | - Chiranjeevi Padala
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
| | - Kaushik Puranam
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
| | - Rajesh K Galimudi
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
| | - Keerthi Kupsal
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
| | - Nivas Shyamala
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
| | - Srilatha Gantala
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
| | - Ramanjaneyulu Kummari
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
| | - Sanjeeva K Chinta
- Department of Radiation Oncology, MNJ Institute of Oncology Regional Cancer Center, Hyderabad, Telangana, India
| | - Surekha R Hanumanth
- Department of Genetics & Biotechnology, Osmania University, Hyderabad, Telangana, India
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Tang RN, Wu P, An L. NADPH oxidase p22phox C242T polymorphism is associated with macroalbuminuria in diabetic patients: A meta-analysis. J Diabetes Complications 2017; 31:1207-1211. [PMID: 28457704 DOI: 10.1016/j.jdiacomp.2017.02.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/20/2016] [Accepted: 02/13/2017] [Indexed: 11/24/2022]
Abstract
AIMS Previous studies suggested an association between C242T polymorphism in NADPH Oxidase p22phox and diabetic nephropathy (DN) risk, but the results were inconsistent. To obtain a more precise estimation, we carried out a meta-analysis to analyze the effect of C242T polymorphism in NADPH Oxidase p22phox on DN risk. METHODS We searched PubMed, ISI Web of Science, and China National Knowledge Infrastructure for all eligible case-control studies through May 2016. The odds ratios (ORs), together with the 95% confidence intervals (CIs), were calculated to evaluate the strength of association between C242T SNP in NADPH Oxidase p22phox on DN risk. RESULTS Overall, ten eligible studies involving a total of 1894 cases and 1746 controls were included in our meta-analysis. The results showed that there was no statistical evidence of association between NADPH oxidase p22phox C242T polymorphism and DN in all genetic models (T vs. C: OR 1.16, 95% CI 0.85-1.59, p=0.34; TT vs. CC: OR 1.49, 95% CI 0.80-2.76, p=0.21; TT/CT vs. CC: OR 1.18, 95% CI 0.81-1.72, p=0.40; TT vs. CT/CC OR 1.31, 95% CI 0.82-2.11, p=0.26). However, significant association was found in diabetic patients with macroalbuminuria. CONCLUSION This meta-analysis indicates that NADPH oxidase p22phox C242T polymorphism is associated with macroalbuminuria in diabetic patients. However, this conclusion should be interpreted with caution due to the small sample size. Larger sample-size studies with homogeneous patients and well-matched controls are required.
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Affiliation(s)
- Ri-Ning Tang
- Institute of Nephrology, ZhongDa Hospital, school of medicine, Southeast University, 210009 Nanjing, China.
| | - Pingping Wu
- Department of Medical Oncology, Jiangsu Cancer Hospital, Nanjing 210009, China
| | - Li An
- Department of Gerontology, The Affiliated ZhongDa Hospital of Southeast University, 210009 Nanjing, China
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Moringa oleifera Seeds Attenuate Vascular Oxidative and Nitrosative Stresses in Spontaneously Hypertensive Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:4129459. [PMID: 28713487 PMCID: PMC5496124 DOI: 10.1155/2017/4129459] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/03/2017] [Indexed: 02/07/2023]
Abstract
Moringa oleifera (MOI) is a tree currently used in traditional medicine in tropical Africa, America, and Asia for therapeutic applications in several disorders including arterial hypertension. We previously described a cardiac protective role of a treatment with MOI seeds in spontaneously hypertensive rats (SHR). Here, we investigated the effects of this treatment on oxidative and nitrosative vascular stresses in SHR, with normotensive Wistar Kyoto rats used as controls. Oxidative and nitrosative stresses detected in SHR aortas using the fluorescent dye dihydroethidine and protein nitrotyrosine staining were reduced in MOI-treated SHR aortas. This was associated with a decrease of free 8-isoprostane circulating level, vascular p22phox and p47phox expressions, and SOD2 upregulation. Moreover, circulating nitrites and C-reactive protein, increased in SHR, were both reduced in SHR receiving MOI. This was associated to decrease iNOS and NF-κB protein expressions after MOI treatment. In functional studies, the endothelium-dependent carbachol-induced relaxation was improved in MOI-treated SHR resistance arteries. Oral administration of MOI seeds demonstrates vascular antioxidant, anti-inflammatory, and endothelial protective effects in SHR. Our data support the use of MOI seeds in diet against cardiovascular disorders associated with oxidative stress and inflammation such as hypertension, scientifically validating the use of these seeds in Malagasy traditional medicine.
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Moringa oleiferaSeeds Attenuate Vascular Oxidative and Nitrosative Stresses in Spontaneously Hypertensive Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017. [DOI: 10.1155/2017%2f4129459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Moringa oleifera(MOI) is a tree currently used in traditional medicine in tropical Africa, America, and Asia for therapeutic applications in several disorders including arterial hypertension. We previously described a cardiac protective role of a treatment with MOI seeds in spontaneously hypertensive rats (SHR). Here, we investigated the effects of this treatment on oxidative and nitrosative vascular stresses in SHR, with normotensive Wistar Kyoto rats used as controls. Oxidative and nitrosative stresses detected in SHR aortas using the fluorescent dye dihydroethidine and protein nitrotyrosine staining were reduced in MOI-treated SHR aortas. This was associated with a decrease of free 8-isoprostane circulating level, vascular p22phoxand p47phoxexpressions, and SOD2 upregulation. Moreover, circulating nitrites and C-reactive protein, increased in SHR, were both reduced in SHR receiving MOI. This was associated to decrease iNOS and NF-κB protein expressions after MOI treatment. In functional studies, the endothelium-dependent carbachol-induced relaxation was improved in MOI-treated SHR resistance arteries. Oral administration of MOI seeds demonstrates vascular antioxidant, anti-inflammatory, and endothelial protective effects in SHR. Our data support the use of MOI seeds in diet against cardiovascular disorders associated with oxidative stress and inflammation such as hypertension, scientifically validating the use of these seeds in Malagasy traditional medicine.
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Liu Q, Wu S, Xue M, Sandford AJ, Wu J, Wang Y, Chen G, Tao C, Tang Y, Feng Y, Luo J, He JQ. Heterozygote Advantage of the rs3794624 Polymorphism in CYBA for Resistance to Tuberculosis in Two Chinese Populations. Sci Rep 2016; 6:38213. [PMID: 27901128 PMCID: PMC5128811 DOI: 10.1038/srep38213] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 11/07/2016] [Indexed: 02/05/2023] Open
Abstract
Phagocyte Nicotinamide Adenine Dinucleotide Phosphate (NADPH) oxidase complex is a key enzyme that catalyzes the production of reactive oxygen species, which mediate oxygen-dependent killing of microorganisms, such as Mycobacterium tuberculosis. P22phox, encoded by CYBA, is the key regulatory subunit of NADPH oxidase. Our study aimed to investigate the association of CYBA polymorphisms with susceptibility to tuberculosis. Three SNPs (rs9932581, rs3794624 and rs4673) were genotyped in the discovery cohort composed of Chinese Han individuals. We found that the A allele of rs3794624 was a significant protective factor against tuberculosis (GA vs. GG: OR = 0.74, 95% CI 0.57-0.96; GA vs. GG+AA: OR = 0.73, 95% CI 0.56-0.95), which was then replicated in the Chinese Tibetan population (GA vs. GG: OR = 0.68, 95% CI 0.51-0.92; AA+GA vs. GG: OR = 0.70, 95% CI 0.52-0.93; GA vs. GG+AA: OR = 0.68, 95% CI 0.51-0.92). Meta-analysis including both cohorts identified overdominance as the best genetic model and provided robust evidence for the protective effect of the rs3794624 GA genotype against tuberculosis without any evidence of heterogeneity (GA vs. GG+AA: OR = 0.71, 95% CI 0.58-0.86). Our study found an association between the GA genotype of rs3794624 in CYBA with decreased tuberculosis susceptibility in two Chinese populations. Further analyses are needed to reveal the potential function of this SNP.
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Affiliation(s)
- Qianqian Liu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Department of Respiratory Diseases, Chengdu Municipal First People’s Hospital, Chengdu, Sichuan, China
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Shouquan Wu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Miao Xue
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Andrew J. Sandford
- Centre for Heart Lung Innovation, University of British Columbia and St. Paul’s Hospital, Vancouver, BC, Canada
| | - Jingcan Wu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yu Wang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Guo Chen
- Division of Geriatrics, Sichuan Provincial People’s Hospital, Chengdu, Sichuan, China
| | - Chuanmin Tao
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yin Tang
- State Key Laboratory of Oral Disease, West China School & Hospital of Stomotology, Sichuan University, Chengdu, Sichuan, China
| | - Yulin Feng
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jun Luo
- Division of Infectious Diseases, People’s Hospital of Aba Tibetan Autonomous Prefecture, Maer, Sichuan, China
| | - Jian-Qing He
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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The CYBA Gene (⁎)49A>G Polymorphism (rs7195830) Is Associated with Hypertension in Patients with Coronary Artery Disease. BIOMED RESEARCH INTERNATIONAL 2016; 2016:1539671. [PMID: 27314008 PMCID: PMC4895038 DOI: 10.1155/2016/1539671] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 05/04/2016] [Indexed: 11/26/2022]
Abstract
Purpose. Single nucleotide polymorphisms of the CYBA gene may modify the risk of coronary artery disease (CAD). The aim of the present study was to investigate whether the ⁎49A>G (rs7195830) polymorphism is associated with CAD. Materials and Methods. CYBA gene ⁎49A>G polymorphism was determined in 481 subjects: 242 patients with premature CAD and 239 age and sex matched controls using the fluorescently labeled allele-specific oligonucleotides method. Results. The frequency of the ⁎49G allele carrier state was significantly higher in patients than in controls (84.8% versus 76.6%, resp., P = 0.020), as well as the frequency of the ⁎49G allele (62.2% versus 54.0%, P = 0.009). Both factors were associated with CAD in the analyzed population (OR = 1.70, 95% CI: 1.04–2.76 for GG+AG versus AA and OR = 1.40, 95% CI: 1.08–1.83 for ⁎49G versus ⁎49A). Carrier state of the ⁎49G allele was a stronger and independent risk factor for CAD among women (OR = 4.35, 95% CI: 1.50–13.20, P = 0.002), as well as the ⁎49G allele (OR = 2.25, 95% CI: 1.34–3.77, P = 0.001). The ⁎49G allele carrier state was also associated with left ventricular hypertrophy in patients with coronary artery disease (P = 0.015). Conclusion. The CYBA gene ⁎49A>G polymorphism modifies the risk of coronary artery disease.
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CYBA encoding p22(phox), the cytochrome b558 alpha polypeptide: gene structure, expression, role and physiopathology. Gene 2016; 586:27-35. [PMID: 27048830 DOI: 10.1016/j.gene.2016.03.050] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 03/07/2016] [Accepted: 03/22/2016] [Indexed: 12/31/2022]
Abstract
P22(phox) is a ubiquitous protein encoded by the CYBA gene located on the long arm of chromosome 16 at position 24, containing six exons and spanning 8.5 kb. P22(phox) is a critical component of the superoxide-generating nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs). It is associated with NOX2 to form cytochrome b558 expressed mainly in phagocytes and responsible for the killing of microorganisms when bacterial and fungal infections occur. CYBA mutations lead to one of the autosomal recessive forms of chronic granulomatous disease (AR22(0)CGD) clinically characterized by recurrent and severe infections in early childhood. However, p22(phox) is also the partner of NOX1, NOX3 and NOX4, but not NOX5, which are analogs of NOX2, the first identified member of the NOX family. P22(phox)-NOX complexes have emerged as one of the most relevant sources of reactive oxygen species (ROS) in tissues and cells, and are associated with several diseases such as cardiovascular and cerebrovascular diseases. The p22(phox)-deficient mouse strain nmf333 has made it possible to highlight the role of p22(phox) in the control of inner ear balance in association with NOX3. However, the relevance of p22(phox) for NOX3 function remains uncertain because AR22(0)CGD patients do not suffer from vestibular dysfunction. Finally, a large number of genetic variations of CYBA have been reported, among them the C242T polymorphism, which has been extensively studied in association with coronary artery and heart diseases, but conflicting results continue to be reported.
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O'Neill S, Brault J, Stasia MJ, Knaus UG. Genetic disorders coupled to ROS deficiency. Redox Biol 2015; 6:135-156. [PMID: 26210446 PMCID: PMC4550764 DOI: 10.1016/j.redox.2015.07.009] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 07/15/2015] [Accepted: 07/16/2015] [Indexed: 12/24/2022] Open
Abstract
Maintaining the redox balance between generation and elimination of reactive oxygen species (ROS) is critical for health. Disturbances such as continuously elevated ROS levels will result in oxidative stress and development of disease, but likewise, insufficient ROS production will be detrimental to health. Reduced or even complete loss of ROS generation originates mainly from inactivating variants in genes encoding for NADPH oxidase complexes. In particular, deficiency in phagocyte Nox2 oxidase function due to genetic variants (CYBB, CYBA, NCF1, NCF2, NCF4) has been recognized as a direct cause of chronic granulomatous disease (CGD), an inherited immune disorder. More recently, additional diseases have been linked to functionally altered variants in genes encoding for other NADPH oxidases, such as for DUOX2/DUOXA2 in congenital hypothyroidism, or for the Nox2 complex, NOX1 and DUOX2 as risk factors for inflammatory bowel disease. A comprehensive overview of novel developments in terms of Nox/Duox-deficiency disorders is presented, combined with insights gained from structure-function studies that will aid in predicting functional defects of clinical variants.
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Affiliation(s)
- Sharon O'Neill
- Conway Institute, University College Dublin, Dublin, Ireland
| | - Julie Brault
- Université Grenoble Alpes, TIMC-IMAG Pôle Biologie, CHU de Grenoble, Grenoble, France; CGD Diagnosis and Research Centre, Pôle Biologie, CHU de Grenoble, Grenoble, France
| | - Marie-Jose Stasia
- Université Grenoble Alpes, TIMC-IMAG Pôle Biologie, CHU de Grenoble, Grenoble, France; CGD Diagnosis and Research Centre, Pôle Biologie, CHU de Grenoble, Grenoble, France
| | - Ulla G Knaus
- Conway Institute, University College Dublin, Dublin, Ireland.
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Patente TA, Mohammedi K, Bellili-Muñoz N, Driss F, Sanchez M, Fumeron F, Roussel R, Hadjadj S, Corrêa-Giannella ML, Marre M, Velho G. Allelic variations in the CYBA gene of NADPH oxidase and risk of kidney complications in patients with type 1 diabetes. Free Radic Biol Med 2015; 86:16-24. [PMID: 25862415 DOI: 10.1016/j.freeradbiomed.2015.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 03/03/2015] [Accepted: 04/01/2015] [Indexed: 11/22/2022]
Abstract
Oxidative stress plays a pivotal role in the pathophysiology of diabetic nephropathy, and the nicotinamide adenine dinucleotide phosphate (NADPH) oxidase system is an important source of reactive oxygen species in hyperglycemic conditions in the kidney. Plasma concentration of advanced oxidation protein products (AOPP), a marker of oxidative stress, is increased in patients with diabetic nephropathy. We investigated associations of variants in the CYBA gene, encoding the regulatory subunit p22(phox) of NADPH oxidase, with diabetic nephropathy and plasma AOPP and myeloperoxidase (MPO) concentrations in type 1 diabetic patients. Seven SNPs in the CYBA region were analyzed in 1357 Caucasian subjects with type 1 diabetes from the SURGENE (n=340), GENEDIAB (n=444), and GENESIS (n=573) cohorts. Duration of follow-up was 10, 9, and 6 years, respectively. Cox proportional hazards and logistic regression analyses were used to estimate hazard ratios (HR) or odds ratios (OR) for incidence and prevalence of diabetic nephropathy. The major G-allele of rs9932581 was associated with the incidence of renal events defined as new cases of microalbuminuria or the progression to a more severe stage of nephropathy during follow-up (HR 1.59, 95% CI 1.17-2.18, P=0.003) in SURGENE. The same allele was associated with established/advanced nephropathy (OR 1.52, 95% CI 1.22-1.92, P=0.0001) and with the incidence of end-stage renal disease (ESRD) (HR 2.01, 95% CI 1.30-3.24, P=0.001) in GENEDIAB/GENESIS pooled studies. The risk allele was also associated with higher plasma AOPP concentration in subsets of SURGENE and GENEDIAB, with higher plasma MPO concentration in a subset of GENEDIAB, and with lower estimated glomerular filtration rate (eGFR) in the three cohorts. In conclusion, a functional variant in the promoter of the CYBA gene was associated with lower eGFR and with prevalence and incidence of diabetic nephropathy and ESRD in type 1 diabetic patients. These results are consistent with a role for NADPH oxidase in the pathophysiology of kidney complications of diabetes.
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Affiliation(s)
- Thiago A Patente
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, 15 rue de l׳École de Médecine, 75006 Paris, France; Laboratório de Endocrinologia Celular e Molecular (LIM-25), Faculdade de Medicina da Universidade de São Paulo (FMUSP), Avenida Dr. Arnaldo 455, CEP 01246903, São Paulo, SP, Brazil
| | - Kamel Mohammedi
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, 15 rue de l׳École de Médecine, 75006 Paris, France; Assistance Publique Hôpitaux de Paris, Bichat Hospital, DHU FIRE, Department of Diabetology, Endocrinology and Nutrition, 46 rue Henri Huchard, 75018 Paris, France
| | - Naïma Bellili-Muñoz
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, 15 rue de l׳École de Médecine, 75006 Paris, France
| | - Fathi Driss
- INSERM, Research Unit 773, 16 rue Henri Huchard, 75018 Paris, France; Assistance Publique Hôpitaux de Paris, Bichat Hospital, Department of Biochemistry, 46 rue Henri Huchard, 75018 Paris, France
| | - Manuel Sanchez
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, 15 rue de l׳École de Médecine, 75006 Paris, France
| | - Frédéric Fumeron
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, 15 rue de l׳École de Médecine, 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, 16 rue Henri Huchard, 75018 Paris, France
| | - Ronan Roussel
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, 15 rue de l׳École de Médecine, 75006 Paris, France; Assistance Publique Hôpitaux de Paris, Bichat Hospital, DHU FIRE, Department of Diabetology, Endocrinology and Nutrition, 46 rue Henri Huchard, 75018 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, 16 rue Henri Huchard, 75018 Paris, France
| | - Samy Hadjadj
- Centre Hospitalier Universitaire de Poitiers, Department of Endocrinology and Diabetology, 2 Rue de la Milétrie, 86021 Poitiers, France; INSERM, Research Unit 1082, 2 Rue de la Milétrie, 86021 Poitiers, France; INSERM, CIC 1402, 2 Rue de la Milétrie, 86021 Poitiers, France; Université de Poitiers, UFR de Médecine et Pharmacie, 6 Rue de la Milétrie, 86073 Poitiers, France
| | - Maria Lúcia Corrêa-Giannella
- Laboratório de Endocrinologia Celular e Molecular (LIM-25), Faculdade de Medicina da Universidade de São Paulo (FMUSP), Avenida Dr. Arnaldo 455, CEP 01246903, São Paulo, SP, Brazil; Centro de Terapia Celular e Molecular (NUCEL/NETCEM) da FMUSP, Avenida Dr. Arnaldo 455, CEP 01246903, São Paulo, SP, Brazil
| | - Michel Marre
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, 15 rue de l׳École de Médecine, 75006 Paris, France; Assistance Publique Hôpitaux de Paris, Bichat Hospital, DHU FIRE, Department of Diabetology, Endocrinology and Nutrition, 46 rue Henri Huchard, 75018 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, 16 rue Henri Huchard, 75018 Paris, France
| | - Gilberto Velho
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers, 15 rue de l׳École de Médecine, 75006 Paris, France.
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Polonikov AV, Ivanov VP, Bogomazov AD, Solodilova MA. [Genetic and biochemical mechanisms of involvement of antioxidant defense enzymes in the development of bronchial asthma]. BIOMEDITSINSKAIA KHIMIIA 2015; 61:427-39. [PMID: 26350733 DOI: 10.18097/pbmc20156104427] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In the present review we have analyzed and summarized recent literature data on genetic and biochemical mechanisms responsible for involvement of antioxidant defense enzymes in the etiology and pathogenesis of bronchial asthma. It has been shown that the mechanisms of asthma development are linked with genetically determined abnormalities in the functioning of antioxidant defense enzymes. These alterations are accompanied by a systemic imbalance between oxidative and anti-oxidative reactions with the shift of the redox state toward increased free radical production and oxidative stress, a key element in the pathogenesis of bronchial asthma.
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Affiliation(s)
| | - V P Ivanov
- Kursk State Medical University, Kursk, Russia
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Manea SA, Constantin A, Manda G, Sasson S, Manea A. Regulation of Nox enzymes expression in vascular pathophysiology: Focusing on transcription factors and epigenetic mechanisms. Redox Biol 2015; 5:358-366. [PMID: 26133261 PMCID: PMC4501559 DOI: 10.1016/j.redox.2015.06.012] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 06/19/2015] [Accepted: 06/22/2015] [Indexed: 02/06/2023] Open
Abstract
NADPH oxidases (Nox) represent a family of hetero-oligomeric enzymes whose exclusive biological function is the generation of reactive oxygen species (ROS). Nox-derived ROS are essential modulators of signal transduction pathways that control key physiological activities such as cell growth, proliferation, migration, differentiation, and apoptosis, immune responses, and biochemical pathways. Enhanced formation of Nox-derived ROS, which is generally associated with the up-regulation of different Nox subtypes, has been established in various pathologies, namely cardiovascular diseases, diabetes, obesity, cancer, and neurodegeneration. The detrimental effects of Nox-derived ROS are related to alterations in cell signalling and/or direct irreversible oxidative damage of nucleic acids, proteins, carbohydrates, and lipids. Thus, understanding of transcriptional regulation mechanisms of Nox enzymes have been extensively investigated in an attempt to find ways to counteract the excessive formation of Nox-derived ROS in various pathological states. Despite the numerous existing data, the molecular pathways responsible for Nox up-regulation are not completely understood. This review article summarizes some of the recent advances and concepts related to the regulation of Nox expression in the vascular pathophysiology. It highlights the role of transcription factors and epigenetic mechanisms in this process. Identification of the signalling molecules involved in Nox up-regulation, which is associated with the onset and development of cardiovascular dysfunction may contribute to the development of novel strategies for the treatment of cardiovascular diseases. Nox is a unique class of enzymes whose sole function is the generation of ROS. Nox-derived ROS play a major role in cell physiology. Enhanced expression and activation of Nox has been reported in numerous pathologies. Nox expression is regulated via complex transcription factor-epigenetic mechanisms. Understanding of Nox regulation is essential to counteract ROS-induced cell damage.
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Affiliation(s)
- Simona-Adriana Manea
- Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8, B.P. Hasdeu Street, 050568 Bucharest, Romania
| | - Alina Constantin
- Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8, B.P. Hasdeu Street, 050568 Bucharest, Romania
| | - Gina Manda
- "Victor Babes" National Institute of Pathology, Bucharest, Romania
| | - Shlomo Sasson
- The Institute for Drug Research, Department of Pharmacology, Faculty of Medicine, The Hebrew University, Jerusalem, Israel
| | - Adrian Manea
- Institute of Cellular Biology and Pathology "Nicolae Simionescu" of the Romanian Academy, 8, B.P. Hasdeu Street, 050568 Bucharest, Romania.
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Abderrazak A, Syrovets T, Couchie D, El Hadri K, Friguet B, Simmet T, Rouis M. NLRP3 inflammasome: from a danger signal sensor to a regulatory node of oxidative stress and inflammatory diseases. Redox Biol 2015; 4:296-307. [PMID: 25625584 PMCID: PMC4315937 DOI: 10.1016/j.redox.2015.01.008] [Citation(s) in RCA: 524] [Impact Index Per Article: 58.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 01/11/2015] [Accepted: 01/12/2015] [Indexed: 02/07/2023] Open
Abstract
IL-1β production is critically regulated by cytosolic molecular complexes, termed inflammasomes. Different inflammasome complexes have been described to date. While all inflammasomes recognize certain pathogens, it is the distinctive feature of NLRP3 inflammasome to be activated by many and diverse stimuli making NLRP3 the most versatile, and importantly also the most clinically implicated inflammasome. However, NLRP3 activation has remained the most enigmatic. It is not plausible that the intracellular NLRP3 receptor is able to detect all of its many and diverse triggers through direct interactions; instead, it is discussed that NLRP3 is responding to certain generic cellular stress-signals induced by the multitude of molecules that trigger its activation. An ever increasing number of studies link the sensing of cellular stress signals to a direct pathophysiological role of NLRP3 activation in a wide range of autoinflammatory and autoimmune disorders, and thus provide a novel mechanistic rational, on how molecules trigger and support sterile inflammatory diseases. A vast interest has created to unravel how NLRP3 becomes activated, since mechanistic insight is the prerequisite for a knowledge-based development of therapeutic intervention strategies that specifically target the NLRP3 triggered IL-1β production. In this review, we have updated knowledge on NLRP3 inflammasome assembly and activation and on the pyrin domain in NLRP3 that could represent a drug target to treat sterile inflammatory diseases. We have reported mutations in NLRP3 that were found to be associated with certain diseases. In addition, we have reviewed the functional link between NLRP3 inflammasome, the regulator of cellular redox status Trx/TXNIP complex, endoplasmic reticulum stress and the pathogenesis of diseases such as type 2 diabetes. Finally, we have provided data on NLRP3 inflammasome, as a critical regulator involved in the pathogenesis of obesity and cardiovascular diseases.
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Affiliation(s)
- Amna Abderrazak
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8256, Biological Adaptation and Ageing - IBPS, F-75005 Paris, France; CNRS-UMR 8256, F-75005 Paris, France; Inserm U1164, F-75005 Paris, France
| | - Tatiana Syrovets
- Institute of Pharmacology of Natural Products & Clinical Pharmacology, Ulm University, D-89081 Ulm, Germany
| | - Dominique Couchie
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8256, Biological Adaptation and Ageing - IBPS, F-75005 Paris, France; CNRS-UMR 8256, F-75005 Paris, France; Inserm U1164, F-75005 Paris, France
| | - Khadija El Hadri
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8256, Biological Adaptation and Ageing - IBPS, F-75005 Paris, France; CNRS-UMR 8256, F-75005 Paris, France; Inserm U1164, F-75005 Paris, France
| | - Bertrand Friguet
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8256, Biological Adaptation and Ageing - IBPS, F-75005 Paris, France; CNRS-UMR 8256, F-75005 Paris, France; Inserm U1164, F-75005 Paris, France
| | - Thomas Simmet
- Institute of Pharmacology of Natural Products & Clinical Pharmacology, Ulm University, D-89081 Ulm, Germany
| | - Mustapha Rouis
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8256, Biological Adaptation and Ageing - IBPS, F-75005 Paris, France; CNRS-UMR 8256, F-75005 Paris, France; Inserm U1164, F-75005 Paris, France.
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Polonikov AV, Ivanov VP, Bogomazov AD, Solodilova MA. Genetic and biochemical mechanisms of involvement of antioxidant defense enzymes in the development of bronchial asthma: A review. BIOCHEMISTRY (MOSCOW) SUPPLEMENT SERIES B: BIOMEDICAL CHEMISTRY 2014; 8:273-285. [DOI: 10.1134/s1990750814040076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
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The -930A>G polymorphism of the CYBA gene is associated with premature coronary artery disease. A case-control study and gene-risk factors interactions. Mol Biol Rep 2014; 41:3287-94. [PMID: 24477591 PMCID: PMC4013450 DOI: 10.1007/s11033-014-3191-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 01/21/2014] [Indexed: 12/12/2022]
Abstract
Reactive oxygen species (ROS) are involved in the pathogenesis of atherosclerosis and coronary artery disease (CAD). NADPH oxidases are the main source of ROS in the vasculature. p22phox is a critical component of vascular NADPH oxidases and is encoded by the CYBA (cytochrome b245 alpha) gene. The −930A>G CYBA polymorphism (rs9932581:A>G) modulates the activity of the CYBA promoter, and influences CYBA transcriptional activity. The aim of the present study was to analyze a possible association between the −930A>G polymorphism and CAD and to search for gene–traditional risk factors interactions. 480 subjects were studied: 240 patients with premature CAD, 240 age and sex matched blood donors. The −930A>G polymorphism was genotyped using the TaqMan® Pre-designed SNP Genotyping Assay (Applied Biosystems). The −930G allele carrier state was a risk factor for CAD (OR 2.03, 95 % CI 1.21–3.44, P = 0.007). A synergistic effect of the −930G allele with overweight/obesity (BMI ≥ 25) and cigarette smoking was found. The estimated CAD risk for BMI ≥ 25 and the −930G allele interaction was about 160 % greater than that predicted by assuming additivity of the effects, and about 40 % greater for interaction of cigarette smoking and the −930G allele. Overweight/obesity was a risk factor for CAD only in the −930G allele carriers (P < 10−10) but not in the AA homozygotes (P = 1.00). In conclusion the −930A>G CYBA polymorphism is associated with CAD in the Polish population. The −930G allele carriers are particularly at risk of consequences of obesity and tobacco smoke exposure.
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Qin YW, Peng J, Liang BY, Su L, Chen Q, Xie JJ, Gu L. The A930G polymorphism ofP22phox (CYBA) gene but not C242T variation is associated with hypertension: a meta-analysis. PLoS One 2013; 8:e82465. [PMID: 24349292 PMCID: PMC3857280 DOI: 10.1371/journal.pone.0082465] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/23/2013] [Indexed: 02/07/2023] Open
Abstract
Background Recently, it has been reported that the A930G and C242T polymorphisms within p22phox (CYBA) gene are involved in the pathogenesis of hypertension. However, the results remain controversial. Furthermore, no previous meta-analysis has been conducted to evaluate the relationship between the A930G and C242T polymorphisms and hypertension. Therefore, we performed this meta-analysis to clarify these controversies. Objective and Methods All of the included articles were retrieved from the PubMed and Embase databases, as well as the CNKI, CBM, Chongqing VIP and Wan Fang databases according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Odds ratios (OR) with corresponding 95% confidence intervals (CI) were used to assess the strength of the association. Accounting for heterogeneity, a fixed or random effects model was respectively adopted. Heterogeneity was checked using the Q test and the I2 statistic. A cumulative meta-analysis was conducted to estimate the tendency of pooled OR. Funnel plots and Egger’s tests were performed to test for possible publication bias. Results Five articles on A930G with 2003 cases/2434 controls and eight articles on C242T with 2644 cases/1967 controls were identified. A significant association of A930G polymorphisms with the risk of hypertension was found in the dominant model (OR=0.59, 95% CI: 0.38–0.92, p=0.021) and allelic model (OR=0.66, 95% CI: 0.46–0.95, p=0.024). In the stratified analysis, a significant association could be found among the hospital-based and population-based studies. However, no evidence of a significant association of the C242T polymorphism with hypertension was found in the overall analysis and subgroup analysis. Conclusions This meta-analysis indicates that the A930G polymorphism, but not the C242T variation, might be a protective factor for hypertension.
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Affiliation(s)
- Yu-Wang Qin
- First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi, China
| | - Jiao Peng
- Pre-Clinical Faculty of Guangxi Medical University, Nanning, Guangxi, China
| | - Bao-Yun Liang
- First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi, China
| | - Li Su
- School of Public Health of Guangxi Medical University, Nanning, Guangxi, China
| | - Qing Chen
- First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi, China
| | - Juan-Juan Xie
- First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi, China
| | - Lian Gu
- First Affiliated Hospital, Guangxi University of Chinese Medicine, Nanning, Guangxi, China
- * E-mail:
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Kim MJ, Nepal S, Lee ES, Jeong TC, Kim SH, Park PH. Ethanol increases matrix metalloproteinase-12 expression via NADPH oxidase-dependent ROS production in macrophages. Toxicol Appl Pharmacol 2013; 273:77-89. [DOI: 10.1016/j.taap.2013.08.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 07/30/2013] [Accepted: 08/06/2013] [Indexed: 12/12/2022]
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Lepetsos P, Pampanos A, Lallos S, Kanavakis E, Korres D, Papavassiliou AG, Efstathopoulos N. Association of NADPH oxidase p22phox gene C242T, A640G and -930A/G polymorphisms with primary knee osteoarthritis in the Greek population. Mol Biol Rep 2013; 40:5491-9. [PMID: 23922196 DOI: 10.1007/s11033-013-2649-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 07/31/2013] [Indexed: 10/26/2022]
Abstract
Osteoarthritis (OA) is the most common form of arthritis with still unknown pathogenic etiology and considerable contribution of genetic factors. Recently, a new emerging role of oxidative stress in the pathology of OA has been reported, lacking however elucidation of the underlying mechanism. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase being a complex enzyme produced by chondrocytes, presents the major source of reactive oxygen species and main contributor of increased oxidative stress. The present study aims to evaluate the association of NADPH oxidase p22phox gene C242T, A640G and -A930G polymorphisms with primary knee OA in the Greek population. One hundred fifty five patients with primary symptomatic knee OA participated in the study along with 139 matched controls. Genotypes were determined using polymerase chain reaction and restriction fragment length polymorphism technique. Allelic and genotypic frequencies were compared between both study groups. NADPH p22phox -A930G polymorphism was significantly associated with knee OA in the crude analysis (P = 0.018). No significant difference was detected for C242T and A640G polymorphisms (P > 0.05). The association between -A930G polymorphism and knee OA disappeared when the results were adjusted for obesity (P = 0.078, odds ratio 0.54, 95 % CI 0.272-1.071). The interaction between all three polymorphisms was not significant. The present study shows that NADPH oxidase p22phox gene C242T, A640G and -A930G polymorphisms are not risk factors for knee OA susceptibility in the Greek population. Further studies are needed to give a global view of the importance of this polymorphism in the pathogenesis of OA.
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Affiliation(s)
- Panagiotis Lepetsos
- 2nd Department of Trauma & Orthopaedics, "Agia Olga" Hospital, University of Athens Medical School, N. Ionia, 14233, Athens, Greece.
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Harrison DG. The mosaic theory revisited: common molecular mechanisms coordinating diverse organ and cellular events in hypertension. ACTA ACUST UNITED AC 2013; 7:68-74. [PMID: 23321405 DOI: 10.1016/j.jash.2012.11.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 11/20/2012] [Indexed: 12/12/2022]
Abstract
More than 60 years ago, Dr. Irvine Page proposed the Mosaic Theory of hypertension, which states that many factors, including genetics, environment, adaptive, neural, mechanical, and hormonal perturbations interdigitate to raise blood pressure. In the past two decades, it has become clear that common molecular and cellular events in various organs underlie many features of the Mosaic Theory. Two of these are the production of reactive oxygen species and inflammation. These factors increase neuronal firing in specific brain centers, increase sympathetic outflow, alter vascular tone and morphology, and promote sodium retention in the kidney. Moreover, factors such as genetics and environment contribute to oxidant generation and inflammation. Other common cellular signals, including calcium signaling and endoplasmic reticulum stress are similarly perturbed in different cells in hypertension and contribute to components of Page's theory. Thus, Page's Mosaic Theory formed a framework for future studies of molecular and cellular signals in the context of hypertension, and has greatly aided our understanding of this complex disease.
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Affiliation(s)
- David G Harrison
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA.
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Li BH, Zhang LL, Zhang BB, Yin YW, Dai LM, Pi Y, Guo L, Gao CY, Fang CQ, Wang JZ, Li JC. Association between NADPH oxidase p22(phox) C242T polymorphism and ischemic cerebrovascular disease: a meta-analysis. PLoS One 2013; 8:e56478. [PMID: 23409188 PMCID: PMC3569432 DOI: 10.1371/journal.pone.0056478] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Accepted: 01/10/2013] [Indexed: 12/03/2022] Open
Abstract
Background Epidemiological studies have evaluated the association between nicotinamide adenine dinucleotide phosphate (NADPH) oxidase p22phox C242T polymorphism and risk of ischemic cerebrovascular disease (ICVD), but the results remain inconclusive. This meta-analysis was therefore designed to clarify these controversies. Methodology/Principal Findings Systematic searches of electronic databases Embase, PubMed and Web of Science, as well as hand searching of the references of identified articles and the meeting abstracts were performed. Statistical analyses were performed using software Review Manager (Version 5.1.7) and Stata (Version 11.0). The pooled odds ratios (ORs) with 95% confidence intervals (95%CIs) were performed. Fixed or random effects model was separately used depending on the heterogeneity between studies. Publication bias was tested by Begg's funnel plot and Egger's regression test. A total of 6 studies including 1,948 cases and 2,357 controls were combined showing no statistical evidence of association between NADPH oxidase p22phox C242T polymorphism and overall ICVD (allelic model: OR = 1.08, 95%CI = 0.93–1.26; additive model: OR = 1.33, 95%CI = 0.81–2.17; dominant model: OR = 1.00, 95%CI = 0.86–1.15; recessive model: OR = 1.06, 95%CI = 0.77–1.45). Significant association was found in large-artery atherosclerotic stroke subgroup (allelic model: OR = 1.12, 95%CI = 0.88–1.41; additive model: OR = 1.36, 95%CI = 0.60–3.09; dominant model: OR = 1.25, 95%CI = 0.74–2.11; recessive model: OR = 2.17, 95%CI = 1.11–4.23). No statistical evidence of significant association was observed for small-vessel occlusive stroke, as well as Asian subgroup and Caucasian subgroup. Statistical powers on the combined sample size (total and subgroup) were all lower than 80%. Conclusions/Significance This meta-analysis indicates that NADPH oxidase p22phox C242T polymorphism is more associated with large-artery atherosclerotic stroke than small-vessel occlusive stroke. However, this conclusion should be interpreted with caution due to the small sample size. Larger sample-size studies with homogeneous ICVD patients and well-matched controls are required.
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Affiliation(s)
- Bing-Hu Li
- Department of Neurology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Yuzhong District, Chongqing, PR China
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Padma G, Bhupatiraju C, Srinivas B, Padma T. High risk for essential hypertension in males conferred by g.15241A>G polymorphism in intron 3 of AGT gene. Clin Exp Hypertens 2012; 35:108-11. [PMID: 22799745 DOI: 10.3109/10641963.2012.702828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A total of 180 hypertensive and 188 normotensive subjects were studied for demographic features and for variations in exon 4 including exon-intron boundary of AGT gene using single-strand conformation polymorphism analysis. Sequencing of the samples showing mobility shift revealed a single-nucleotide polymorphism variant g.15241A>G in intron 3 of the gene. The polymorphism was consistent with Hardy-Weinberg equilibrium in both the cases and the controls. Although the genotype distribution and allele frequencies did not differ significantly in general, high risk was observed for males with G allele (OR = 2.08; 95% CI = 1.02-4.21; P = .04). Similar results were obtained when the genotypes were tested in dominant model wherein G allele carriers were found to be at twofold risk for developing essential hypertension (OR = 2.09; 95% CI = 0.99-4.41; P = 0.05). This report is the first one in the literature showing association of g.15241A>G polymorphism with a clinical condition.
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Affiliation(s)
- Gunda Padma
- Department of Genetics, Osmania University, Tarnaka, Hyderabad 500007, India
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Genetic susceptibility to atherosclerosis. Stroke Res Treat 2012; 2012:362941. [PMID: 22550613 PMCID: PMC3329672 DOI: 10.1155/2012/362941] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Accepted: 01/21/2012] [Indexed: 12/24/2022] Open
Abstract
Atherosclerosis is a complex multifocal arterial disease involving interactions of multiple genetic and environmental factors. Advances in techniques of molecular genetics have revealed that genetic ground significantly influences susceptibility to atherosclerotic vascular diseases. Besides further investigations of monogenetic diseases, candidate genes, genetic polymorphisms, and susceptibility loci associated with atherosclerotic diseases have been identified in recent years, and their number is rapidly increasing. This paper discusses main genetic investigations fields associated with human atherosclerotic vascular diseases. The paper concludes with a discussion of the directions and implications of future genetic research in arteriosclerosis with an emphasis on prospective prediction from an early age of individuals who are predisposed to develop premature atherosclerosis as well as to facilitate the discovery of novel drug targets.
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Perianayagam MC, Tighiouart H, Nievergelt CM, O'Connor DT, Liangos O, Jaber BL. CYBA Gene Polymorphisms and Adverse Outcomes in Acute Kidney Injury: A Prospective Cohort Study. NEPHRON EXTRA 2011; 1:112-23. [PMID: 22470385 PMCID: PMC3290849 DOI: 10.1159/000333017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND NADPH oxidase is an important enzyme involved in the generation of reactive oxygen species in acute kidney injury (AKI). Its key subunit, p22(phox), is encoded by the highly polymorphic CYBA gene. METHODS We examined the associations of CYBA gene polymorphisms across the CYBA locus (rs8854, rs3794624, rs4673, rs4782390, and rs1049255) with dialysis requirement or in-hospital death in 256 hospitalized adults with AKI. Dominant and haplotype multivariable logistic regression analyses were performed, adjusted for sex, race, age, and severity of illness. RESULTS The baseline characteristics of the patients were not different among genotype groups with the exception of a lower prevalence of sepsis and shock in the CYBA rs8854 A-allele group; a higher prevalence of shock in the CYBA rs4782390 T-allele group, and a higher APACHE II score in the CYBA rs1049255 G-allele group. The CYBA rs8854 A-allele had an adjusted odds ratio (OR) of 0.41 (95% confidence interval, CI, 0.18-0.96) for the outcome of dialysis requirement or in-hospital death. The CYBA rs4673 T-allele and rs1049255 G-allele had unadjusted ORs of 1.69 (95% CI 1.03-2.79) and 1.66 (95% CI 1.01-2.73) for the composite outcome, respectively, which became non-significant after multivariable adjustment. The remaining 2 polymorphisms were not associated with the outcomes of interest. Finally, the presence of the CYBA A-A-G-G haplotype (generated from rs4782390, rs4673, rs3794624, and rs8854, all in Hardy-Weinberg equilibrium) was associated with an elevated OR of 1.81 (95% CI 1.07-3.08) for dialysis requirement or in-hospital death, which was attenuated after multivariable adjustment (OR 1.80; 95% CI 0.99-3.29). CONCLUSION This study identifies several polymorphisms spanning the entire CYBA gene locus and a common haplotype as risk markers for dialysis requirement or in-hospital death in patients with AKI. Additional studies are needed to validate these findings.
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Affiliation(s)
- Mary C Perianayagam
- Department of Medicine, Division of Nephrology, Kidney and Dialysis Research Laboratory, St. Elizabeth's Medical Center, Boston, Mass
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Piérola J, Alemany A, Yañez A, de-la-Peña M, Sánchez-de-la-Torre M, Esquinas C, Pérez-Gutierrez C, Burguera B, Barbé F, Barceló A. NADPH oxidase p22phox polymorphisms and oxidative stress in patients with obstructive sleep apnoea. Respir Med 2011; 105:1748-54. [PMID: 21872458 DOI: 10.1016/j.rmed.2011.08.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 08/02/2011] [Accepted: 08/04/2011] [Indexed: 11/18/2022]
Abstract
BACKGROUND Obstructive Sleep Apnoea (OSA) is associated with increased oxidative stress. NADPH oxidases are the main source of Reactive Oxygen Species (ROS) in the vasculature. Several polymorphisms related to NADPH oxidase expression or activity have been identified. We compared the distribution of the allelic frequencies of A-930G and C242T polymorphisms and their possible relationship with the levels of 8-isoprostanes as a marker of oxidative stress in patients with OSA and in a control group without OSA. METHODS This is a case-control study. We determined the A-930G and C242T p22phox genotypes in 427 patients with OSA and in 139 healthy subjects recruited from the Sleep Unit of Son Dureta University Hospital, (Palma de Mallorca, Spain). 8-Isoprostane was measured as an oxidative stress marker. RESULTS The distribution of the p22phox genotypes in OSA and in control subjects was different. The risk of OSA was associated with the presence of the G allele in the A-930G p22phox independently of age, gender, Body Mass Index (BMI), hypertension, dyslipemia and diabetes, but no association was found with the C242T polymorphism. The median level of 8-isoprostane was significantly higher in OSA patients. Synergic effect in 8-Isoprostane levels was observed when these two polymorphisms were analysed together. CONCLUSION the A-930G polymorphism of the p22phox gene may play an important role in genetic susceptibility to OSA. Furthermore, the C242T and A-930G polymorphisms of the p22phox gene have a synergic effect on the 8-isoprostane levels, suggesting that they may be involved in the development of oxidative stress in these patients.
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Affiliation(s)
- Javier Piérola
- Unidad de Investigación, Hospital Universitario Son Espases, Ctra Valldemossa 79, 07120 Palma de Mallorca, Spain.
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Abstract
Hypertension is a major contributor to the development of renal failure, cardiovascular disease, and stroke. These pathologies are associated with vascular functional and structural changes including endothelial dysfunction, altered contractility, and vascular remodeling. Central to these phenomena is oxidative stress. Factors that activate pro-oxidant enzymes, such as NADPH oxidase, remain poorly defined, but likely involve angiotensin II, mechanical stretch, and inflammatory cytokines. Reactive oxygen species influence vascular, renal, and cardiac function and structure by modulating cell growth, contraction/dilatation, and inflammatory responses via redox-dependent signaling pathways. Compelling data from molecular and cellular experiments, together with animal studies, implicate a role for oxidative stress in hypertension. However, the clinical evidence is still controversial. This review provides current insights on the mechanisms of the generation of reactive oxygen species and the vascular effects of oxidative stress and discusses the significance of oxidative damage in experimental and clinical hypertension.
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The effect of p22(phox) -930A/G, A640G and C242T polymorphisms of NADPH oxidase on peripheral and central pressures in healthy, normotensive individuals. Hypertens Res 2010; 33:814-8. [PMID: 20505675 DOI: 10.1038/hr.2010.78] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The nicotinamide adenine dinucleotide phosphate (NADPH) oxidase produces superoxide, thus regulating redox state in the vessel wall. Three single-nucleotide polymorphisms (SNPs; -930A/G, A640G and C242T) of the p22(phox) subunit have been associated with hypertension; however, their role in peripheral and central pressures in normotensive individuals has not been addressed. A total of 210 healthy, normotensive individuals were studied. Genotypes for the -930A/G, A640G and C242T polymorphisms were determined by polymerase chain reaction. Peripheral pressures were measured by mercury sphygmomanometer and aortic pressures by a validated device using applanation tonometry. Both peripheral and central pressures differed across -930A/G genotypes. G allele carriers showed higher levels of peripheral systolic blood pressure (PSBP; AA: 113+/-12, GG/AG: 119+/-12 mm Hg; P<0.01) and peripheral diastolic blood pressure (AA: 70+/-9, GG/AG: 73+/-10 mm Hg; P<0.05). Regarding central pressures, AA homozygotes had lower central systolic blood pressure (CSBP; AA: 103+/-12, GG/AG: 108+/-12 mm Hg; P<0.01) and central diastolic blood pressure (AA: 71+/-9, GG/AG: 74+/-10 mm Hg; P<0.05). In multiple linear regression analysis, presence of the G allele (AG or GG) independently predicted CSBP. Blood pressure levels did not differ across A640G and C242T genotypes. The -930A/G polymorphism of p22(phox) is a determinant of peripheral and central pressures in normotensive individuals. The G allele is associated with higher blood pressure in the brachial artery, as well as in the aorta. These findings further elucidate the role of this polymorphism in the regulation of blood pressure. In contrast, the A640G and C242T SNPs do not influence peripheral and central pressures in normotensives.
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Oxenkrug GF. Metabolic syndrome, age-associated neuroendocrine disorders, and dysregulation of tryptophan-kynurenine metabolism. Ann N Y Acad Sci 2010; 1199:1-14. [DOI: 10.1111/j.1749-6632.2009.05356.x] [Citation(s) in RCA: 148] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Hoffmann M, Schirmer MA, Tzvetkov MV, Kreuz M, Ziepert M, Wojnowski L, Kube D, Pfreundschuh M, Trümper L, Loeffler M, Brockmöller J. A functional polymorphism in the NAD(P)H oxidase subunit CYBA is related to gene expression, enzyme activity, and outcome in non-Hodgkin lymphoma. Cancer Res 2010; 70:2328-38. [PMID: 20215507 DOI: 10.1158/0008-5472.can-09-2388] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
NAD(P)H oxidase is a major endogenous source of reactive oxygen species (ROS). ROS may not only be involved in carcinogenesis but also in efficacy of chemotherapeutic agents like doxorubicin. By a comprehensive genotyping approach covering 48 genetic polymorphisms (single-nucleotide polymorphisms) in five subunits of phagocytic NAD(P)H oxidase, we asked whether they affect gene expression, enzymatic activity, and outcome of CHO(E)P chemotherapy. A highly consistent effect was observed for the CYBA 640A>G variant. In peripheral blood granulocytes of 125 healthy volunteers, the G allele of 640A>G was associated with lower NAD(P)H oxidase activity (P = 0.006). Moreover, the G allele was associated with lower mRNA and protein expression (both P = 0.02). Of clinical importance, the outcome of patients suffering from non-Hodgkin lymphoma and treated with CHO(E)P regimen was dependent on the CYBA 640A>G polymorphism. In an exploratory study (n = 401), carriers of 640GG had an event-free survival (EFS) risk ratio of 1.95 [95% confidence interval (95% CI), 1.31-2.90; P = 0.001] compared with 640AA. In a confirmatory set (n = 477), the risk ratios were 1.53 (1.04-2.25, P = 0.03). The complete set of 878 patients showed a relative risk of 1.72 (1.30-2.26) and 1.59 (1.14-2.21) for EFS and overall survival, respectively. Further molecular-biological experiments showed lower expression and reduced stability of transcripts with the G allele in lymphoblastoid cell lines. Transfection of allele-specific plasmids into HEK293 cells elicited lower activity for the G allele in a luciferase reporter gene construct. Thus, CYBA 640A>G was shown to be a functional polymorphism with possible consequences for patients receiving CHO(E)P chemotherapy and might have further implications for other ROS-mediated modalities.
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Affiliation(s)
- Marion Hoffmann
- Department of Clinical Pharmacology and Department of Hematology and Oncology, Georg-August-University Göttingen, Göttingen, Germany
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CYP1A1, CYP1A2 and CYBA gene polymorphisms associated with oxidative stress in COPD. Clin Chim Acta 2010; 411:474-80. [PMID: 20080081 DOI: 10.1016/j.cca.2009.12.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Revised: 12/19/2009] [Accepted: 12/22/2009] [Indexed: 11/23/2022]
Abstract
BACKGROUND The genetic susceptibility to chronic obstructive pulmonary disease (COPD) depends on detoxification and antioxidant enzymes, which detoxify cigarette smoke reactive components that, otherwise, generate oxidative stress. METHODS In a case-control study of 346 subjects with and without COPD, we examined the polymorphisms 462Ile/Val, 3801T/C of CYP1A1, -3860G/A of CYP1A2 and -930A/G, 242C/T of CYBA individually or in combination and their contribution to oxidative stress markers by measuring malondialdehyde (MDA), catalase (CAT), glutathione (GSH) and glutathione peroxidase (GPx). RESULTS COPD patients had significantly increased MDA concentration (p<0.001) and decreased CAT activity, GSH concentration, GPx activity (p< or =0.01). The patients were over-represented by the alleles 462Val, 3801C of CYP1A1 and -930G, 242C of CYBA (p<0.001, p=0.003, p=0.030 and p=0.031, respectively) and consequently the haplotypes of same alleles i.e. 462Val:3801C, 462Val:3801T and -930G:242C (p=0.048, p=0.016 and p=0.039, respectively). Similarly, CYP1A1 and CYP1A2 haplotypes, 462Val:3860G and 462Val:3801T:3860G were significantly over-represented (p=0.001 and p=0.003), respectively in patients. The same alleles-associated genotype-combinations between genes were more prevalent in patients. Of note, the genotypes, 462Ile/Val+Val/Val, 3801TC+CC of CYP1A1 and -930AG+GG of CYBA associated with increased MDA concentration (p=0.018, p=0.045 and p=0.017, respectively), decreased CAT activity (p<0.0001, p=0.080 and p<0.0001, respectively) and GSH concentration (p<0.0001, p=0.0002 and p=0.011, respectively) in patients. CONCLUSION The identified alleles, its haplotypes and the genotype-combination along with increased oxidative stress, signify the importance in susceptibility to COPD.
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Stiefel P, Miranda ML, Bellido LM, Luna J, Jiménez L, Pamies E, de Frutos PG, Villar J. Genotype of the CYBA promoter −930A/G, polymorphism C677T of the MTHFR and APOE genotype in patients with hypertensive disorders of pregnancy: An observational study. Med Clin (Barc) 2009; 133:657-61. [DOI: 10.1016/j.medcli.2009.03.042] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Accepted: 03/12/2009] [Indexed: 10/20/2022]
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Insulin resistance determines phagocytic nicotinamide adenine dinucleotide phosphate oxidase overactivation in metabolic syndrome patients. J Hypertens 2009; 27:1420-30. [PMID: 19357530 DOI: 10.1097/hjh.0b013e32832b1e8f] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Metabolic syndrome (MetS) is associated with insulin resistance and increases the cardiovascular risk. Oxidative stress constitutes a potential mechanism that links insulin resistance and cardiovascular disease. The aim of this study was to analyze the relationship of NADPH oxidase activation with insulin resistance, and the effect of this interaction on the cardiovascular risk in MetS patients. METHODS NADPH oxidase-dependent superoxide production and expression was evaluated by luminescence and western blot, respectively, in peripheral blood mononuclear cells obtained from 125 patients with MetS. Insulin resistance was defined by the homeostasis model assessment index. Matrix metalloproteinase-9 was quantified by enzyme-linked immunosorbent assay in plasma samples. To ascertain the mechanisms involved in vivo, we performed in-vitro experiments in cultured macrophages. RESULTS Fifty-six percent of patients with MetS showed insulin resistance. Plasma matrix metalloproteinase-9 levels were higher (P < 0.05) in insulin-resistant patients than in patients with insulin sensitivity. NADPH oxidase-dependent superoxide production was augmented (P < 0.05) in insulin-resistant patients with respect to insulin-sensitive patients. The interaction between insulin resistance and abnormally high NADPH oxidase-mediated superoxide production was associated with the highest matrix metalloproteinase-9 values. Increased NADPH oxidase-dependent superoxide production was significantly associated with higher NADPH oxidase p22phox expression in insulin-resistant than in insulin-sensitive patients. Interestingly, insulin upregulated p22phox in peripheral blood mononuclear cells and in murine macrophages. CONCLUSION Insulin resistance is associated with phagocytic NADPH oxidase activation. This association results in the highest cardiovascular risk in MetS patients.
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Macías-Reyes A, Rodríguez-Esparragón F, Caballero-Hidalgo A, Hernández-Trujillo Y, Medina A, Rodríguez-Pérez JC. Insight into the role of CYBA A640G and C242T gene variants and coronary heart disease risk. A case-control study. Free Radic Res 2009; 42:82-92. [DOI: 10.1080/10715760701796918] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- A. Macías-Reyes
- Research Unit, HUGC Dr. Negrín, Las Palmas de Gran Canaria, Spain
| | | | - A. Caballero-Hidalgo
- Research Unit, HUGC Dr. Negrín, Las Palmas de Gran Canaria, Spain
- Universidad Las Palmas de Gran Canaria, HUGC Dr. Negrín, Las Palmas de Gran Canaria, Spain
| | | | - A. Medina
- Research Unit, HUGC Dr. Negrín, Las Palmas de Gran Canaria, Spain
- Cardiology, HUGC Dr. Negrín, Las Palmas de Gran Canaria, Spain
| | - J. C. Rodríguez-Pérez
- Research Unit, HUGC Dr. Negrín, Las Palmas de Gran Canaria, Spain
- Universidad Las Palmas de Gran Canaria, HUGC Dr. Negrín, Las Palmas de Gran Canaria, Spain
- Nephrology Departments, HUGC Dr. Negrín, Las Palmas de Gran Canaria, Spain
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Abstract
The endothelial cell layer plays a major role in the development and progression of atherosclerosis. Endothelial NO synthase (eNOS) produces nitric oxide (NO) from L-arginine. NO can rapidly react with reactive oxygen species to form peroxynitrite. This reduces NO availability, impairs vasodilatation, and mediates proinflammatory and prothrombotic processes such as leukocyte adhesion and platelet aggregation. In the vessel wall, specific NAD(P)H oxidase complexes are major sources of reactive oxygen species. These NAD(P)H oxidases can transfer electrons across membranes to oxygen and generate superoxide anions. The short-lived superoxide anion rapidly dismutates to hydrogen peroxide, which can further increase the production of reactive oxygen species. This can lead to uncoupling of eNOS switching enzymatic activity from NO to superoxide production. This review describes the structure and regulation of different NAD(P)H oxidase complexes. We will also focus on NO/superoxide anion balance as modulated by hemodynamic forces, vasoconstrictors, and oxidized low-density lipoprotein. We will then summarize the recent advances defining the role of nitric oxide and NAD(P)H oxidase-derived reactive oxygen species in the development and progression of atherosclerosis. In conclusion, novel mechanisms affecting the vascular NO/superoxide anion balance will allow the development of therapeutic strategies in the treatment of cardiovascular diseases.
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Affiliation(s)
- Gregor Muller
- Department of Vascular Endothelium and Microcirculation, University of Technology Dresden, Dresden, Germany
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Fan M, Raitakari OT, Kahonen M, Juonala M, Hutri-Kahonen N, Porsti I, Viikari J, Lehtimaki T. The association between cigarette smoking and carotid intima-media thickness is influenced by the -930A/G CYBA gene polymorphism: the Cardiovascular Risk in Young Finns Study. Am J Hypertens 2009; 22:281-7. [PMID: 19151692 DOI: 10.1038/ajh.2008.349] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Smoking-induced damage to the cardiovascular system has been shown in many studies; however, the degree of damage varies from individual to individual. We hypothesized that the -930A/G CYBA gene polymorphism in the NADPH oxidase influences the association between cigarette smoking and carotid intima-media thickness (IMT) in young healthy adults. METHODS Cross-sectional data obtained in 2001 for the Cardiovascular Risk in Young Finns Study were used. IMT was measured with ultrasound. The genotyping was performed using a 5'-nuclease assay. A linear regression model was used to test whether the interaction between smoking and the genotypes was associated with IMT. The magnitude of the interaction effect was further examined by performing a stratified analysis according to smoking habits. RESULTS In the entire population, the mean and maxima IMT were higher in smokers than nonsmokers (P = 0.005 and 0.008, respectively). The differences were most significant in subjects with the GG genotype, borderline significant for the GA genotype, and nonsignificant for the AA genotype. The interaction of genotypes with smoking was associated with mean and maximal IMT (P = 0.042 and 0.022). Among smokers, subjects with the GG genotype had a higher mean and maximal IMT compared with carriers of the A allele (P = 0.021 and 0.012). In contrast, the mean and maximal IMT were lower for G allele carriers than subjects with the AA genotype among nonsmokers (P = 0.022 and 0.026). All results had been adjusted for potential risk factors related to IMT. CONCLUSION The -930A/G polymorphism modifies the association between cigarette smoking and IMT in young healthy adults.
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Ochoa MC, Razquin C, Zalba G, Martínez-González MA, Martínez JA, Marti A. G allele of the -930A>G polymorphism of the CYBA gene is associated with insulin resistance in obese subjects. J Physiol Biochem 2008; 64:127-33. [PMID: 19043982 DOI: 10.1007/bf03168240] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
It has been shown that NADPH oxidase plays a role in oxidative stress which has been involved in the development of metabolic syndrome. The -930A/G polymorphism of the CYBA gene (that codes p22phox, a major component of the NADPH oxidase) has been associated with human hypertension and with a reduction in NADPH oxidase activity. In this work, we have examined the influence of the -930A/G polymorphism on obesity risk and insulin resistance in a case-control study of Spanish subjects (n=313). In the obese group (n=159), there was a statistically significant association between the GG genotype of the -930A/G polymorphism of the CYBA gene and fasting insulin levels and HOMA index. This outcome agrees with previous findings concerning functional analyses of this polymorphism and reinforces the hypothesis that insulin resistance is associated with oxidative stress. In conclusion, a protective effect in carriers of the -930A/G polymorphism of the p22phox gene against insulin resistance in a population of Spanish obese adults has been found.
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Affiliation(s)
- M C Ochoa
- Department of Nutrition, Food Science, Physiology and Toxicology, University of Navarra, Pamplona, Spain
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Puddu P, Puddu GM, Cravero E, Rosati M, Muscari A. The molecular sources of reactive oxygen species in hypertension. Blood Press 2008; 17:70-7. [PMID: 18568695 DOI: 10.1080/08037050802029954] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In both animal models and humans, increased blood pressure has been associated with oxidative stress in the vasculature, i.e. an excessive endothelial production of reactive oxygen species (ROS), which may be both a cause and an effect of hypertension. In addition to NADPH oxidase, the best characterized source of ROS, several other enzymes may contribute to ROS generation, including nitric oxide synthase, lipoxygenases, cyclo-oxygenases, xanthine oxidase and cytochrome P450 enzymes. It has been suggested that also mitochondria could be considered a major source of ROS: in situations of metabolic perturbation, increased mitochondrial ROS generation might trigger endothelial dysfunction, possibly contributing to the development of hypertension. However, the use of antioxidants in the clinical setting induced only limited effects on human hypertension or cardiovascular endpoints. More clinical studies are needed to fully elucidate this so called "oxidative paradox" of hypertension.
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Affiliation(s)
- Paolo Puddu
- Department of Internal Medicine, Aging and Nephrological Diseases, University of Bologna and S Orsola-Malpighi Hospital, Bologna, Italy
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42
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Genetics and immunopathology of chronic granulomatous disease. Semin Immunopathol 2008; 30:209-35. [DOI: 10.1007/s00281-008-0121-8] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Accepted: 04/24/2008] [Indexed: 12/15/2022]
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Ivanov VP, Solodilova MA, Polonikov AV, Khoroshaya IV, Kozhuhov MA, Panfilov VI. Association analysis of C242T and A640G polymorphisms in the gene for p22phox subunit of NADPH oxidase with the risk of bronchial asthma: A pilot study. RUSS J GENET+ 2008; 44:601-608. [DOI: 10.1134/s102279540805013x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
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44
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NADPH oxidase CYBA polymorphisms, oxidative stress and cardiovascular diseases. Clin Sci (Lond) 2008; 114:173-82. [PMID: 18184111 DOI: 10.1042/cs20070130] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Oxidative stress plays a key role in the pathophysiology of several major cardiovascular diseases, including atherosclerosis, hypertension, heart failure, stroke and diabetes. ROS (reactive oxygen species) affect multiple tissues either directly or through NO depletion. ROS induce cardiovascular dysfunction by modulating cell contraction/dilation, migration, growth/apoptosis and extracellular matrix protein turnover, which contribute to vascular and cardiac remodelling. Of the several sources of ROS within the cardiovascular system, a family of multisubunit NADPH oxidases appears to be a predominant contributor of superoxide anion. Recent findings suggest a significant role of the genetic background in NADPH oxidase regulation. Common genetic polymorphisms within the promoter and exonic sequences of CYBA, the gene that encodes the p22(phox) subunit of NADPH oxidase, have been characterized in the context of cardiovascular diseases. This review aims to present the current state of research into these polymorphisms in their relationship to cardiovascular diseases.
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Carey RM. Pathophysiology of Primary Hypertension. Microcirculation 2008. [DOI: 10.1016/b978-0-12-374530-9.00020-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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46
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Moreno MU, San José G, Fortuño A, Beloqui O, Redón J, Chaves FJ, Corella D, Díez J, Zalba G. A novel CYBA variant, the -675A/T polymorphism, is associated with essential hypertension. J Hypertens 2007; 25:1620-6. [PMID: 17620958 DOI: 10.1097/hjh.0b013e3281ac211d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Oxidative stress is implicated in hypertension and the NADPH oxidase systems constitute the main source of superoxide in vascular wall. We searched for new polymorphisms within the CYBA promoter, the human gene that encodes the p22phox protein, and studied their potential association with essential hypertension. DESIGN A case-control study in a random sample of the general population. METHODS CYBA polymorphisms were determined by restriction fragment length polymorphism and allelic discrimination. NADPH oxidase activity was quantified in phagocytic cells by chemiluminescence. RESULTS We identified three novel polymorphisms, at positions -852, -675 and -536 from the ATG codon. Only the -675(A/T) polymorphism associated with essential hypertension. The prevalence of the TT genotype and the T allele frequency were significantly higher (P < 0.05) in hypertensives than in normotensives. Furthermore, TT hypertensives exhibited higher (P < 0.05) systolic blood pressure values than TA/AA hypertensives. Increased phagocytic NADPH oxidase activity was observed in TT subjects compared to TA and AA individuals (P < 0.05). Enhanced carotid intima-media thickness, a surrogate marker of atherosclerosis, was found in TT subjects compared to TA and AA individuals (P < 0.05). Finally, mutagenesis experiments demonstrated a functional role of this polymorphism on the CYBA promoter activity. CONCLUSION The -675 (A/T) CYBA polymorphism may be a novel genetic marker associated with essential hypertension. Furthermore, TT subjects exhibit features of NADPH oxidase-mediated oxidative stress and asymptomatic atherosclerosis.
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Affiliation(s)
- María U Moreno
- Division of Cardiovascular Sciences, Centre for Applied Medical Research, University Clinic, University of Navarra, Pamplona, Spain
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Schirmer M, Hoffmann M, Kaya E, Tzvetkov M, Brockmöller J. Genetic polymorphisms of NAD(P)H oxidase: variation in subunit expression and enzyme activity. THE PHARMACOGENOMICS JOURNAL 2007; 8:297-304. [PMID: 17684477 DOI: 10.1038/sj.tpj.6500467] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Genetic polymorphisms in superoxide-producing NAD(P)H oxidase have been linked to cardiovascular diseases including anthracycline-induced cardiotoxicity. We quantified NAD(P)H oxidase activity in granulocytes of 81 healthy Caucasian volunteers (in addition, 51 in an independent confirmatory study) by chemiluminescence using the luminol analogue L-012. Expression of CYBA, NCF4 and RAC2 coding for NAD(P)H oxidase subunits was measured in whole blood cells in 59 study participants by real-time PCR. Of the five variants investigated (-930A>G, 242C>T, 640A>G in CYBA and the recently reported -368G>A in NCF4 and 7508T>A in RAC2), only CYBA 640A>G was consistently associated with superoxide production (640GG carriers 28% less than AA individuals, P=0.05 in each cohort, P=0.005 in combined analysis). RAC2 7508T>A was related to higher expression of RAC2 (P=0.02) and NCF4 (P=0.04). In summary, CYBA 640A>G rather than 242C>T was associated with reduced activity. The quantitatively moderate effect and the high intra-individual variability should be considered for further study design.
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Affiliation(s)
- M Schirmer
- Department of Clinical Pharmacology, Georg-August-University Göttingen, Göttingen, Germany.
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Tsukimori K, Nakano H, Wake N. Difference in Neutrophil Superoxide Generation During Pregnancy Between Preeclampsia and Essential Hypertension. Hypertension 2007; 49:1436-41. [PMID: 17420332 DOI: 10.1161/hypertensionaha.106.086751] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This study investigated whether production of reactive oxygen species by neutrophils differs between women with preeclampsia and those with essential hypertension. First, we assessed superoxide production by neutrophils during pregnancy and 4 weeks after delivery in 15 healthy pregnant women, 12 women with preeclampsia, and 7 pregnant women with essential hypertension. We then examined effects of serum from each subject on superoxide production by neutrophils obtained from healthy nonpregnant women. Neutrophil superoxide production was measured by cytochrome C reduction. N-formyl-methionyl-leucyl-phenylalanine-stimulated superoxide production was significantly increased in neutrophils from women with preeclampsia and women with essential hypertension compared with normal pregnant women. Four weeks postpartum, the level of superoxide production was significantly decreased in women with preeclampsia but not in women with either normal pregnancy or essential hypertension. When neutrophils obtained from nonpregnant women were preincubated with predelivery sera from each group, sera from women with preeclampsia significantly enhanced superoxide production compared with sera from the other 2 groups. When postpartum serum was used, enhancement of neutrophil superoxide production by serum from women with preeclampsia was significantly decreased compared with that by predelivery serum. In conclusion, increased neutrophil superoxide production resolved after delivery in preeclampsia, whereas activation persisted postpartum in women with essential hypertension. The different transition of neutrophil superoxide production in response to pregnancy appears to be that preeclampsia is characterized by the presence of serum factors that enhance neutrophil superoxide production. Thus, in preeclampsia, serum factors bear a more essential role producing superoxide than a behavior of neutrophils.
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Affiliation(s)
- Kiyomi Tsukimori
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812, Japan.
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Bedard K, Krause KH. The NOX family of ROS-generating NADPH oxidases: physiology and pathophysiology. Physiol Rev 2007; 87:245-313. [PMID: 17237347 DOI: 10.1152/physrev.00044.2005] [Citation(s) in RCA: 4878] [Impact Index Per Article: 286.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
For a long time, superoxide generation by an NADPH oxidase was considered as an oddity only found in professional phagocytes. Over the last years, six homologs of the cytochrome subunit of the phagocyte NADPH oxidase were found: NOX1, NOX3, NOX4, NOX5, DUOX1, and DUOX2. Together with the phagocyte NADPH oxidase itself (NOX2/gp91(phox)), the homologs are now referred to as the NOX family of NADPH oxidases. These enzymes share the capacity to transport electrons across the plasma membrane and to generate superoxide and other downstream reactive oxygen species (ROS). Activation mechanisms and tissue distribution of the different members of the family are markedly different. The physiological functions of NOX family enzymes include host defense, posttranlational processing of proteins, cellular signaling, regulation of gene expression, and cell differentiation. NOX enzymes also contribute to a wide range of pathological processes. NOX deficiency may lead to immunosuppresion, lack of otoconogenesis, or hypothyroidism. Increased NOX activity also contributes to a large number or pathologies, in particular cardiovascular diseases and neurodegeneration. This review summarizes the current state of knowledge of the functions of NOX enzymes in physiology and pathology.
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Affiliation(s)
- Karen Bedard
- Biology of Ageing Laboratories, University of Geneva, Geneva, Switzerland
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Sales ML, Ferreira MCS, Leme CA, Velloso LA, Gallani MCJ, Colombo RCR, Franchini KG, Nadruz W. Non-effect of p22-phox −930A/G polymorphism on end-organ damage in Brazilian hypertensive patients. J Hum Hypertens 2007; 21:504-6. [PMID: 17314996 DOI: 10.1038/sj.jhh.1002170] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The p22-phox subunit is an essential component of NAD(P)H oxidase enzymatic complex, which is considered the major source of oxidative stress products in the cardiovascular system. The -930G allele of p22-phox has been associated with higher promoter activity, increased NAD(P)H oxidase-mediated oxidative stress and hypertension. We recently reported that left ventricular hypertrophy is accompanied by increased myocardial p22-phox expression in aortic-banded rats, suggesting that this protein might be involved in hypertensive cardiac hypertrophy.
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