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Khalil A, Khan HN, Wasim M, Ayesha H, Awan FR. Development of low-cost in-house tetra-ARMS-PCR assay for the screening of five CBS mutations found in Pakistani homocystinuria patients. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2023; 43:517-529. [PMID: 37971987 DOI: 10.1080/15257770.2023.2280013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023]
Abstract
BACKGROUND Classical homocystinuria is an inborn amino acid metabolism disorder resulting from mutations in the Cystathionine-β-Synthase (CBS) gene. These mutations lead to elevated homocysteine and methionine levels and reduced cysteine levels in the blood. Typically, diagnosis occurs after patients display symptoms, and various lab methods confirm it. DNA sequencing is the best option for early detection of genetic variants in asymptomatic suspected individuals. Unfortunately, its high cost can hinder its use, especially in low-income countries like Pakistan. OBJECTIVE Aim of this study was to devise a robust low-cost diagnostic/screening assay based on Tetra-ARMS-PCR for five prevalent genetic variants found in Pakistani classical homocystinuria patients. MATERIALS AND METHODS In the current study, T-ARMS-PCR assays were developed for five mutations (c.975G > C, c.770C > T, c.752T > C, c.1039 + 1G > T, c.451 + 1GG > TA), which were characterized previously in classical homocystinuria patients. These low-cost T-ARMS-PCR assays were then used to screen the affected individuals and their family members to identify their genotypes for pathogenic variations in the asymptomatic patients and carriers in their respective families. RESULTS The outcomes were entirely consistent with those obtained from Sanger DNA sequencing, confirming the sensitivity, specificity, and reliability of the T-ARMS-PCR assay for detecting CBS mutations. CONCLUSION T-ARMS-PCR has wide applications for low-income countries for the screening and early diagnosis of asymptomatic patients and carriers in the homocystinuria affected families as well as other inherited diseases.
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Affiliation(s)
- Adila Khalil
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
- NIBGE College, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, Pakistan
| | - Haq Nawaz Khan
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
- NIBGE College, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, Pakistan
- Biological and Biomedical Sciences, The Aga Khan University, Karachi, Pakistan
| | - Muhammad Wasim
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
- NIBGE College, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, Pakistan
- Biological and Biomedical Sciences, The Aga Khan University, Karachi, Pakistan
| | - Hina Ayesha
- Department of Pediatrics, Punjab Medical College, Faisalabad Medical University, Faisalabad, Pakistan
| | - Fazli Rabbi Awan
- Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
- NIBGE College, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, Pakistan
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Mallhi TH, Shahid M, Rehman K, Khan YH, Alanazi AS, Alotaibi NH, Akash MSH, Butt MH. Biochemical Association of MTHFR C677T Polymorphism with Myocardial Infarction in the Presence of Diabetes Mellitus as a Risk Factor. Metabolites 2023; 13:251. [PMID: 36837870 PMCID: PMC9958922 DOI: 10.3390/metabo13020251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
Myocardial infarction (MI) is a cardiovascular disease that occurs due to the blockage of the coronary artery. Subsequently, cardiac muscles receive a lower oxygen supply, which leads to the death of cardiac muscles. The etiology of MI is linked to various environmental, occupational, and genetic factors. Various studies have been conducted on the polymorphism of genes involved in MI. Previous studies have shown that different variants of the methylene tetrahydrofolate reductase (MTHFR) gene are involved in causing MI by altering the metabolism of folate and homocysteine. However, the genetic polymorphism of MTHFR C677T (rs1801133) and its association with MI in the presence of diabetes mellitus (DM) as a risk factor still needs to be investigated. This study recruited 300 participants who were divided into three groups, i.e., the control, MI, and MI-DM. The blood samples collected from the study participants were subjected to various biochemical tests and their clinical parameters were monitored. MTHFR C677T (rs1801133) genotyping was performed by Tetra ARMS PCR using predetermined primers. The MTHFR C677T (rs1801133) polymorphism was associated with MI in the presence of DM as a risk factor among the participants. The MTHFR C677T (rs1801133) T/T homozygous genotype was found to be significant among MI patients in the presence of DM as a risk factor.
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Affiliation(s)
- Tauqeer Hussain Mallhi
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka 72388, Saudi Arabia
| | - Momina Shahid
- Department of Pharmacy, The University of Faisalabad, Faisalabad 38000, Pakistan
- Department of Pharmaceutical Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Kanwal Rehman
- Department of Pharmacy, The Women University, Multan 60000, Pakistan
| | - Yusra Habib Khan
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka 72388, Saudi Arabia
| | - Abdullah Salah Alanazi
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka 72388, Saudi Arabia
| | - Nasser Hadal Alotaibi
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka 72388, Saudi Arabia
| | | | - Muhammad Hammad Butt
- Department of Medicinal Chemistry, Faculty of Pharmacy, Uppsala University, 75123 Uppsala, Sweden
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Masud R, Khan AUH, Baqai HZ, Iqbal A. The Correlation of MTHFR SNPs, Homocysteine, and Conventional Risk Predictors with Coronary Artery Disease. RUSS J GENET+ 2021. [DOI: 10.1134/s1022795421110077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Masud R, Anjum A, Anwar M, Khan W, Shahzad M, Jawwad G. The risk stratification of coronary vascular disease as linked to homocysteine, its modulating genes, genetic polymorphisms, conventional predictors, and with antihypertensive medicaments. CHINESE J PHYSIOL 2021; 64:298-305. [DOI: 10.4103/cjp.cjp_71_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Masud R, Khan AUH, Anjum AF, Jawwad G, Azeem Z, Baqai HZ, Hashmi SN. The Connotation of Variances in the Risk Predictors, Medications, Homocysteine, and Homocysteine Pathway Gene Polymorphisms with CVA/Stroke. Glob Med Genet 2020; 7:113-120. [PMID: 33693444 PMCID: PMC7938795 DOI: 10.1055/s-0041-1722884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Cerebrovascular accidents (CVAs) are vascular multifactorial, multigenic ailments with intricate genetic, environmental risk influences. The present study aimed to establish affiliation of CVAs/stroke with blood parameters, differences in prescribed drugs consumption, and with differences in homocysteine pathway genes polymorphisms. The participants in study included controls n = 251, transient ischemic attack (TIA) patients n = 16, and stroke cases n = 122, respectively, (total participants, n = 389). The analyzed single nucleotide polymorphisms (SNPs) included C677T(rs1801133), A1298C(rs1801131) of methylene tetrahydrofolate reductase ( MTHFR ), A2756G(rs1805087) of methyl tetrahydrofolate homocysteine methyltransferase/methionine synthase ( MS ), and the A192G(rs662) of paraoxonase 1( PON1 ) genes, all validated by tetra-primer allele refractory mutation system polymerase chain reaction (T-ARMS-PCR). The insertion deletion (I/D; rs4646994) polymorphism in angiotensin converting enzyme ( ACE ) gene was analyzed using routine PCR. All studied traits were scrutinized through analysis of variance (ANOVA), and later through regression analysis. Through ANOVA and multiple comparison, there was association of CVA with serum homocysteine, cholesterol, and with diastolic blood pressure readings. When data was subjected to regression, serum homocysteine and diastolic blood pressure (significant through ANOVA), as well as two additional traits, high-density lipoproteins (HDL), and rs1801133 MTHFR SNP sustained statistical significance and noteworthy odds in relation to CVA and stroke. The ailments affecting cerebral vasculature are mutifactorial, whereby genes, proteins, and environmental cues all exert cumulative effects enhancing CVA risk. The current study emphasizes that SNPs and variation in circulating biomarkers can be used for screening purposes and for reviewing their effects in stroke/CVA-linked risk progression.
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Affiliation(s)
- Rizwan Masud
- Department of Physiology, CMH Kharian Medical College, Kharian, Pakistan
| | - Aleem Ul Haq Khan
- Department of Biochemistry, CMH Kharian Medical College, Kharian, Pakistan
| | - Aiman Farogh Anjum
- Department of Physiology, CMH Kharian Medical College, Kharian, Pakistan
| | - Ghazala Jawwad
- Department of Physiology, Rawal Institute of Health Sciences, Islamabad, Pakistan
| | - Zahid Azeem
- Department of Biochemistry, AJ&K Medical College, Muzaffarabad, AJ&K, Pakistan
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Vohra M, Sharma AR, Paul B, Bhat MK, Satyamoorthy K, Rai PS. In silico characterization of functional single nucleotide polymorphisms of folate pathway genes. Ann Hum Genet 2018; 82:186-199. [PMID: 29574679 DOI: 10.1111/ahg.12231] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 10/16/2017] [Accepted: 10/18/2017] [Indexed: 12/31/2022]
Abstract
Folate metabolism genes are pivotal to critical biological processes and are related to several conditions, including developmental, cognitive, and cardiovascular anomalies. A systematic catalog of genetic polymorphisms in protein coding regions, regulatory transcription factor binding sites, and miRNA binding sites associated with folate pathway genes may contribute to personalized medicine. We performed a comprehensive computational survey of single nucleotide polymorphisms (SNPs) of folate pathway genes to highlight functional polymorphisms in the coding region, transcription factor binding sites, and miRNAs binding sites. Folate pathway genes were searched through PubMed and Kyoto Encyclopedia of Genes and Genomes pathway databases. SNPs were identified and characterized using the University of California, Santa Cruz genome browser and SNPnexus tool. Functional characterization of nonsynonymous SNPs (nsSNPS) was performed using bioinformatics tools, and common deleterious nsSNPs were identified. We identified 48 genes of folate pathway containing 287 SNPs in the coding regions. Out of these SNPs, rs5742905, rs45511401, and rs1801133 were predicted to be deleterious through four different bioinformatics tools. Three-dimensional structures of two proteins with and without deleterious nsSNPs were predicted by SWISSPDB viewer and SuperPose. Besides, a total of 237 SNPs was identified in transcription factor binding sites using the Genomatix software suite and six miRNA target site SNPs using miRNASNP. This systematic and extensive in silico analysis of functional SNPs of folate pathway may provide a foundation for future targeted mechanistic, structure-function, and genetic epidemiological studies.
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Affiliation(s)
- Manik Vohra
- Department of Biotechnology, School of Life Sciences, Manipal University, Planetarium Complex, Manipal, Karnataka, India
| | - Anu Radha Sharma
- Department of Biotechnology, School of Life Sciences, Manipal University, Planetarium Complex, Manipal, Karnataka, India
| | - Bobby Paul
- Department of Bioinformatics, School of Life Sciences, Manipal University, Planetarium Complex, Manipal, Karnataka, India
| | - Manoj K Bhat
- Department of Bioinformatics, School of Life Sciences, Manipal University, Planetarium Complex, Manipal, Karnataka, India
| | - Kapaettu Satyamoorthy
- Department of Cell and Molecular Biology, School of Life Sciences, Manipal University, Planetarium Complex, Manipal, Karnataka, India
| | - Padmalatha S Rai
- Department of Biotechnology, School of Life Sciences, Manipal University, Planetarium Complex, Manipal, Karnataka, India
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Zhao XX, Liu J, Zhao H, Zhou Y, Li L, Wang H. The effect of cardiovascular risk factors on the carotid intima-media thickness in an old-aged cohort with hypertension: a longitudinal evolution with 4-year follow-up of a random clinical trial. Clin Exp Hypertens 2018; 41:49-57. [PMID: 29553852 DOI: 10.1080/10641963.2018.1441860] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Xiao xiao Zhao
- Department of Vascular Medicine, Peking University Shougang Hospital, Beijing, China
| | - Jinbo Liu
- Department of Vascular Medicine, Peking University Shougang Hospital, Beijing, China
| | - Hongwei Zhao
- Department of Vascular Medicine, Peking University Shougang Hospital, Beijing, China
| | - Yingyan Zhou
- Department of Vascular Medicine, Peking University Shougang Hospital, Beijing, China
| | - Lihong Li
- Department of Vascular Medicine, Peking University Shougang Hospital, Beijing, China
| | - Hongyu Wang
- Department of Vascular Medicine, Peking University Shougang Hospital, Beijing, China
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Borai IH, Hassan NS, Shaker OG, Ashour E, Badrawy ME, Fawzi OM, Mageed L. Synergistic effect of ACE and AGT genes in coronary artery disease. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2018. [DOI: 10.1016/j.bjbas.2017.09.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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9
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Masud R, Baqai HZ. The communal relation ofMTHFR,MTR,ACEgene polymorphisms and hyperhomocysteinemia as conceivable risk of coronary artery disease. Appl Physiol Nutr Metab 2017; 42:1009-1014. [DOI: 10.1139/apnm-2017-0030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Homocysteine and its modulating genes have strongly emerged as novel biomarkers for coronary artery disease (CAD). In the present study, we investigated whether polymorphisms in homocysteine pathway genes and the plasma levels of homocysteine, folate, and vitamin B12, independently or in combination, are associated with CAD risk. A total of 504 participants were recruited (cases, n = 254; controls, n = 250, respectively). Tetra primer allele refractory mutation system polymerase chain reaction (PCR) was used for resolving the genotypes of 5′10′ methylenetetrahydrofolate reductase ‘MTHFR’ polymorphisms (rs1801133, rs1801131), 5′ methyl tetrahydrofolate homocysteine methyltransferase ‘MTR’ polymorphism (rs1805087), paroxanse1 ‘PON1’ polymorphism (rs662), and cystathionine beta synthase ‘CBS’ polymorphism (rs5742905). Conventional PCR amplification was carried out for resolving angiotensin converting enzyme ‘ACE’ insertion/deletion (I/D) polymorphism (rs4646994). ANOVA analysis, adjusted for the covariates, revealed that rs1801133, rs1805087 polymorphisms and homocysteine levels were associated with CAD. Logistic regression analysis (adjusted) revealed similar findings. Logistic regression analysis after applying factorial design to the studied single nucleotide polymorphisms (SNPs) revealed that homocysteine levels and heterozygous and mutant alleles at rs1801133, rs1805087, along with mutant alleles at rs1801131, rs4646994, conferred higher risk for CAD. Our results provide insight into the multifactorial nature of coronary artery disease. We highlight that SNPs in folate pathway genes and homocysteine have role in disease causation and can be used in disease prediction strategies.
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Affiliation(s)
- Rizwan Masud
- Division of Physiology, Department of Biomedical Sciences, College of Medicine, King Faisal University, Al Ahsa, 31982, Saudi Arabia
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10
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Peña-Romero AC, Navas-Carrillo D, Marín F, Orenes-Piñero E. The future of nutrition: Nutrigenomics and nutrigenetics in obesity and cardiovascular diseases. Crit Rev Food Sci Nutr 2017; 58:3030-3041. [PMID: 28678615 DOI: 10.1080/10408398.2017.1349731] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Over time, the relationship between diet and health has aroused great interest, since nutrition can prevent and treat several diseases. It has been demonstrated that general recommendations on macronutrients and micronutrients do not affect to every individual in the same way because diet is an important environmental factor that interacts with genes. Thus, there is a growing necessity of improving a personalized nutrition to treat obesity and associated medical conditions, taking into account the interactions between diet, genes and health. Therefore, the knowledge of the interactions between the genome and nutrients at the molecular level, has led to the advent of nutritional genomics, which involves the sciences of nutrigenomics and nutrigenetics. In this review, we will comprehensively analyze the role of the most important genes associated with two interrelated chronic medical conditions, such as obesity and cardiovascular diseases.
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Affiliation(s)
| | - Diana Navas-Carrillo
- b Department of Surgery, Hospital de la Vega Lorenzo Guirao , University of Murcia , Murcia , Spain
| | - Francisco Marín
- c Department of Cardiology, Hospital Clínico Universitario Virgen de la Arrixaca (IMIB-Arrixaca) , Universidad de Murcia , Murcia , Spain
| | - Esteban Orenes-Piñero
- a Department of Biochemistry and Molecular Biology-A , University of Murcia , Murcia , Spain
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11
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Sun K, Song J, Liu K, Fang K, Wang L, Wang X, Li J, Tang X, Wu Y, Qin X, Wu T, Gao P, Chen D, Hu Y. Associations between homocysteine metabolism related SNPs and carotid intima-media thickness: a Chinese sib pair study. J Thromb Thrombolysis 2017; 43:401-410. [PMID: 27822905 PMCID: PMC5337241 DOI: 10.1007/s11239-016-1449-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Carotid intima-media thickness (CIMT) is a good surrogate for atherosclerosis. Hyperhomocysteinemia is an independent risk factor for cardiovascular diseases. We aim to investigate the relationships between homocysteine (Hcy) related biochemical indexes and CIMT, the associations between Hcy related SNPs and CIMT, as well as the potential gene–gene interactions. The present study recruited full siblings (186 eligible families with 424 individuals) with no history of cardiovascular events from a rural area of Beijing. We examined CIMT, intima-media thickness for common carotid artery (CCA-IMT) and carotid bifurcation, tested plasma levels for Hcy, vitamin B6 (VB6), vitamin B12 (VB12) and folic acid (FA), and genotyped 9 SNPs on MTHFR, MTR, MTRR, BHMT, SHMT1, CBS genes. Associations between SNPs and biochemical indexes and CIMT indexes were analyzed using family-based association test analysis. We used multi-level mixed-effects regression model to verify SNP-CIMT associations and to explore the potential gene–gene interactions. VB6, VB12 and FA were negatively correlated with CIMT indexes (p < 0.05). rs2851391 T allele was associated with decreased plasma VB12 levels (p = 0.036). In FABT, CBS rs2851391 was significantly associated with CCA-IMT (p = 0.021) and CIMT (p = 0.019). In multi-level mixed-effects regression model, CBS rs2851391 was positively significantly associated with CCA-IMT (Coef = 0.032, se = 0.009, raw p < 0.001) after Bonferoni correction (corrected α = 0.0056). Gene–gene interactions were found between CBS rs2851391 and BHMT rs10037045 for CCA-IMT (p = 0.011), as well as between CBS rs2851391 and MTR rs1805087 for CCA-IMT (p = 0.007) and CIMT (p = 0.022). Significant associations are found between Hcy metabolism related genetic polymorphisms, biochemical indexes and CIMT indexes. There are complex interactions between genetic polymorphisms for CCA-IMT and CIMT.
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Affiliation(s)
- Kexin Sun
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Jing Song
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Kuo Liu
- Department of Epidemiology and Biostatistics, Capital Medical University, 10 You'anmenwai Xitoutiao, Beijing, 100069, China
| | - Kai Fang
- Beijing Center for Disease Prevention and Control, No.16 He Pingli Middle Street, Dongcheng District, Beijing, 100013, China
| | - Ling Wang
- Pingshan New District Center for Disease Control and Prevention, Shenzhen, 518118, Guangdong, China
| | - Xueyin Wang
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Jing Li
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Xun Tang
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Yiqun Wu
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Xueying Qin
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Tao Wu
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Pei Gao
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Dafang Chen
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China
| | - Yonghua Hu
- Department of Epidemiology and Biostatistics, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China.
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Angiotensin converting enzyme gene polymorphism studies: A case-control study. Saudi J Biol Sci 2015; 22:327-31. [PMID: 25972755 PMCID: PMC4423719 DOI: 10.1016/j.sjbs.2014.11.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 10/27/2014] [Accepted: 11/11/2014] [Indexed: 11/23/2022] Open
Abstract
Mild gestational hyperglycemia (MGH) is a very common complication of pregnancy that is characterized by intolerance to glucose. The association of angiotensin-converting enzyme (ACE) insertion/deletion (I/D) polymorphism to MGH has been previously reported. In this study, we evaluated the association between ACE polymorphism and the risk of MGH in a Saudi population. We conducted a case-control study in a population of 100 MGH patients and 100 control subjects. ACE gene polymorphism was analyzed by the novel approach of tetraprimer amplification refractory mutation system (ARMS)-polymerase chain reaction (PCR). The frequency of ACE polymorphism was not associated with either alleles or genotypes in MGH patients. Glucose concentration was found to be significantly associated with the MGH group. Our study suggests that ACE genotypes were not associated with ACE polymorphism in a Saudi population.
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13
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Huang A, Pinto JT, Froogh G, Kandhi S, Qin J, Wolin MS, Hintze TH, Sun D. Role of homocysteinylation of ACE in endothelial dysfunction of arteries. Am J Physiol Heart Circ Physiol 2014; 308:H92-100. [PMID: 25416191 DOI: 10.1152/ajpheart.00577.2014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The direct impact of de novo synthesis of homocysteine (Hcy) and its reactive metabolites, Hcy-S-S-Hcy and Hcy thiolactone (HCTL), on vascular function has not been fully elucidated. We hypothesized that Hcy synthesized within endothelial cells affects activity of angiotensin-converting enzyme (ACE) by direct homocysteinylation of its amino- and/or sulfhydryl moieties. This covalent modification enhances ACE reactivity toward angiotensin II (ANG II)-NADPH oxidase-superoxide-dependent endothelial dysfunction. Mesenteric and coronary arteries isolated from normal rats were incubated for 3 days with or without exogenous methionine (Met, 0.1-0.3 mM), a precursor to Hcy. Incubation of arteries in Met-free media resulted in time-dependent decreases in vascular Hcy formation. By contrast, vessels incubated with Met produced Hcy in a dose-dependent manner. There was a notably greater de novo synthesis of Hcy from endothelial than from smooth muscle cells. Enhanced levels of Hcy production significantly impaired shear stress-induced dilation and release of nitric oxide, events that are associated with elevated production of vascular superoxide. Each of these processes was attenuated by ANG II type I receptor blocker or ACE and NADPH oxidase inhibitors. In addition, in vitro exposure of purified ACE to Hcy-S-S-Hcy/HCTL resulted in formation of homocysteinylated ACE and an enhanced ACE activity. The enhanced ACE activity was confirmed in isolated coronary and mesenteric arteries that had been exposed directly to Hcy-S-S-Hcy/HCTL or after Met incubation. In conclusion, vasculature-derived Hcy initiates endothelial dysfunction that, in part, may be mediated by ANG II-dependent activation of NADPH oxidase in association with homocysteinylation of ACE.
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Affiliation(s)
- An Huang
- Department of Physiology, New York Medical College, Valhalla, New York; and
| | - John T Pinto
- Department of Biochemistry, New York Medical College, Valhalla, New York
| | - Ghezal Froogh
- Department of Physiology, New York Medical College, Valhalla, New York; and
| | - Sharath Kandhi
- Department of Physiology, New York Medical College, Valhalla, New York; and
| | - Jun Qin
- Department of Physiology, New York Medical College, Valhalla, New York; and
| | - Michael S Wolin
- Department of Physiology, New York Medical College, Valhalla, New York; and
| | - Thomas H Hintze
- Department of Physiology, New York Medical College, Valhalla, New York; and
| | - Dong Sun
- Department of Physiology, New York Medical College, Valhalla, New York; and
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Lajin B, Alachkar A, Sakur AA. Triplex tetra-primer ARMS-PCR method for the simultaneous detection of MTHFR c.677C>T and c.1298A>C, and MTRR c.66A>G polymorphisms of the folate-homocysteine metabolic pathway. Mol Cell Probes 2011; 26:16-20. [PMID: 22074746 DOI: 10.1016/j.mcp.2011.10.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2011] [Revised: 10/24/2011] [Accepted: 10/24/2011] [Indexed: 12/18/2022]
Abstract
The folate-homocysteine metabolic pathway was shown to play an important role in several diseases such as cancers, cardiovascular diseases, and neurodegenerative diseases. The c.677C>T and c.1298A>C polymorphisms of the Methylenetetrahydrofolate reductase (MTHFR) gene, and c.66A>G of the Methionine synthase reductase (MTRR) gene are the most commonly investigated polymorphisms in the folate-homocysteine metabolic pathway. The currently used methods for the detection of the three polymorphisms are either slow and laborious or extremely expensive. In this paper, a new highly optimized method for the simultaneous detection of the three single nucleotide polymorphisms is described. The proposed method utilizes 12 primers in a single PCR reaction to detect the three polymorphisms simultaneously based on the principle of tetra-primer ARMS-PCR (also known as PCR-CTPP). The proposed method offers extremely fast, economical, and simple detection. Validation by PCR-RFLP showed 100% concordance in genotype assignment. The proposed method was successfully applied to a sample of the Syrian population (n=126), which was not previously genotyped for any of the three SNPs. The variant allele frequencies were found to be 31, 29, and 43% for the c.677C>T, c.1298A>C, and c.66A>G polymorphisms, respectively. The proposed method is the first to detect three SNPs in a single PCR reaction based on tetra-primer ARMS-PCR or PCR-CTPP. We suggest that the use of Betaine may play an important role in multiplex tetra-primer ARMS-PCR or PCR-CTPP based on its potential capacity to close the gap in melting temperature between different primers.
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Affiliation(s)
- Bassam Lajin
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Aleppo, Aleppo, Syria.
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Bai Y, Wang L, Hu S, Wei Y. Association of angiotensin-converting enzyme I/D polymorphism with heart failure: a meta-analysis. Mol Cell Biochem 2011; 361:297-304. [PMID: 22015653 DOI: 10.1007/s11010-011-1115-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Accepted: 10/07/2011] [Indexed: 10/16/2022]
Abstract
Heart failure (HF) is a complex clinical syndrome and is thought to have a genetic basis. Numerous case-control studies have investigated the association between heart failure and polymorphisms in candidate genes. Most studies focused on the angiotensin-converting enzyme insertion/deletion (ACE I/D) polymorphism, however, the results were inconsistent because of small studies and heterogeneous samples. The objective was to assess the association between the ACE I/D polymorphism and HF. We performed a meta-analysis of all case-control studies that evaluated the association between ACE I/D polymorphism and HF in humans. Studies were identified in the PUBMED and EMBASE databases, reviews, and reference lists of relevant articles. Two reviewers independently assessed the studies. Seventeen case-control studies with a total of 5576 participants were included in the meta-analysis, including 2453 cases with HF and 3123 controls. The heterogeneity between studies was significant. No association was found under all the four genetic models (D vs. I, DD vs. ID and II, DD and ID vs. II, DD vs. ID). Subgroup analyses for ischemic HF (IHF) and HF because of dilated cardiomyopathy (DHF) also showed no significant association between ACE I/D polymorphism and HF. No significant association between the ACE I/D polymorphism and risk of HF was found in this meta-analysis. The future studies should focus on large-scale prospective and case-control studies which designed to investigate gene-gene and gene-environment interactions to shed light on the genetics of HF.
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Affiliation(s)
- Yuanyuan Bai
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital & Cardiovascular Institute, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China
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Tapper W, Gibson J, Morton NE, Collins A. A comparison of methods to detect recombination hotspots. Hum Hered 2008; 66:157-69. [PMID: 18408383 DOI: 10.1159/000126050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2007] [Accepted: 09/06/2007] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE A number of linkage disequilibrium (LD)-based methods have been developed to describe recombination and infer hotspots. We determine the correspondence between LDMAP and LDhat, and between LDMAP and LDhot by comparison with linkage maps and hotspots that have been verified by sperm typing. METHODS Regression and variance analyses were used to compare LDMAP and LDhat with linkage maps. The location and intensity of hotspots inferred by LDMAP and LDhot were compared with fifteen verified hotspots. RESULTS Despite different methodologies and assumptions, LDMAP, LDhat, and linkage maps are highly concordant. Closer inspection shows that LDMAP corresponds more closely with linkage maps across the genome and on sixteen chromosomes compared with LDhat. LDhot identified fourteen and ten of the verified hotspots using high and low density maps. In comparison, LDMAP identified all fifteen hotspots at high and low density. However, some significant discrepancies between sperm and LD-based recombination rates remain. CONCLUSIONS Combining information from linkage and LDMAP to construct sex-specific high resolution linkage maps suggests that some of these discrepancies may be due to female recombination while others may relate to the age of hotspots. LDMAP based estimates between approximately 68,000 and approximately 112,000 hotspots in the genome with mean widths less than 4 kb.
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Affiliation(s)
- William Tapper
- Human Genetics Division, School of Medicine, Southampton General Hospital, University of Southampton, Southampton, UK.
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