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Jomoui W, Satthakarn S, Panyasai S. Molecular understanding of unusual HbE-β +-thalassemia with Hb phenotype similar to HbE heterozygote: simple and rapid differentiation using HbE levels. Ann Med 2023; 55:2267054. [PMID: 37816374 PMCID: PMC10732225 DOI: 10.1080/07853890.2023.2267054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 09/30/2023] [Indexed: 10/12/2023] Open
Abstract
BACKGROUND Low HbF expression in HbE-β+-thalassemia may lead to misdiagnosis of HbE heterozygosity. We aimed to characterize the β- and α-globin genes and the modifying factors related to HbF expression in patients with an Hb phenotype similar to that of HbE heterozygotes. Furthermore, screening tools for differentiating HbE-β+-thalassemia from HbE heterozygotes have been investigated. PARTICIPANTS AND METHODS A total of 2133 participants with HbE and HbA with varying HbF levels were recruited. Polymerase chain reaction-based DNA analysis and sequencing were performed to characterize β- and α-globin genes. DNA polymorphism at position -158 nt 5' to Gγ-globin was performed by XmnI restriction digestion. Receiver operating characteristic (ROC) curves were constructed using the area under the curve (AUC). Cutoff values of HbA2, HbE, and HbF levels for the differentiation of HbE-β+-thalassemia from HbE heterozygotes were determined. RESULTS Five β+-thalassemia mutations trans to βE-gene (β-87(C>A), β-31(A>G), β-28(A>G), β19(A>G), and β126(T>G)) were identified in 79 patients. Among these, 54 presented with low HbF levels, and 25 presented with high HbF levels. ROC curve analysis revealed an excellent AUC of 1.000 (95% confidence interval:1.000-1.000) for HbE levels, and a cut-off point of ≥35.0% had 100.0% sensitivity, specificity, and Youden's index for differentiating HbE-β+-thalassemia from HbE heterozygotes. The proportion of α-thalassemia mutations was 46.3 and 8.0% among HbE-β+-thalassemia patients with low and high HbF levels, respectively. Two rare α-thalassemia mutations (Cap +14(C>G) and initiation codon (ATG>-TG)) of α2-globin genes were identified. The genotype and allele of the polymorphism at -158 nt 5' to Gγ-globin was found to be negatively associated with HbF expression. CONCLUSIONS HbE-β+-thalassemia cannot be disregarded until appropriate DNA analysis is performed, and the detection of α-thalassemia mutations should always be performed under these conditions. An HbE level ≥35.0% may indicate screening of samples for DNA analysis for HbE-β+-thalassemia diagnosis.
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Affiliation(s)
- Wittaya Jomoui
- Department of Pathology, Maha Chakri Sirindhorn Medical Center, Srinakharinwirot University, Ongkharak, Nakhon Nayok, Thailand
- Clinical Research Centre, Srinakharinwirot University, Nakhon Nayok, Thailand
| | - Surada Satthakarn
- Faculty of Allied Health Sciences, Burapha University, Chonburi, Thailand
| | - Sitthichai Panyasai
- Department of Medical Technology, School of Allied Health Sciences, University of Phayao, Phayao, Thailand
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Wang P, Cui P, Luo Q, Chen J, Tang H, Zhang L, Chen S, Ma J. Penetrance of Parkinson disease LRRK2 G2385R-associated variant in the Chinese population. Eur J Neurol 2022; 29:2639-2644. [PMID: 35608967 DOI: 10.1111/ene.15417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 05/02/2022] [Accepted: 05/19/2022] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND PURPOSE Penetrance estimates of the leucine-rich repeat kinase 2 (LRRK2) variants for Parkinson disease (PD) vary widely. G2385R is one of the most common LRRK2 variants in Asian populations, and its penetrance is currently unknown. We aimed to estimate the penetrance of G2385R in the Chinese population. METHODS The G2385R variant was tested by Sanger sequencing in 6386 participants older than 50 years, all from the community cohort established by Shanghai Ruijin Hospital in 2009-2011. G2385R carriers and matched noncarriers underwent a brief questionnaire survey (including sex, current age, PD diagnosis, and age at onset) and face-to-face PD assessment during 2020-2021. The penetrance of PD was estimated by the Kaplan-Meier method. RESULTS A total of 396 G2385R carriers and 415 noncarriers were included, after excluding those with a baseline diagnosis of PD or unwilling to participate. In G2385R carriers, the penetrance of PD was 1.64% at 70 years, 10.26% at 80 years, and 18.49% at 90 years, and reached 25.90% at 95 years. The penetrance of PD in G2385R carriers was higher than in noncarriers (p = 0.0071). In noncarriers, only 0%, 3.72%, and 9.66% developed parkinsonism by 70, 80, and 90 years of age. Among carriers and noncarriers, there were no statistically significant differences in penetrance comparisons between males and females, or between urban and rural. CONCLUSIONS The lifetime penetrance of LRRK2 G2385R in the Chinese population was 25.9%. The penetrance modifier of G2385R in our study was age-related. Further investigation of genetic and environmental modifiers affecting G2385R penetrance is warranted.
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Affiliation(s)
- Pei Wang
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Peijing Cui
- Department of Geriatrics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qi Luo
- Department of Pediatric Hematology-Oncology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jie Chen
- Li Chiu Kong Family Sleep Assessment Unit, Department of Psychiatry, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Huidong Tang
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lina Zhang
- Department of Biostatistics, Clinical Research Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shengdi Chen
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jianfang Ma
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Baszyński J, Kamiński P, Bogdzińska M, Mroczkowski S, Szymański M, Wasilow K, Stanek E, Hołderna-Bona K, Brodzka S, Bilski R, Tkachenko H, Kurhaluk N, Stuczyński T, Lorek M, Woźniak A. Enzymatic Antioxidant Defense and Polymorphic Changes in Male Infertility. Antioxidants (Basel) 2022; 11:817. [PMID: 35624681 PMCID: PMC9138092 DOI: 10.3390/antiox11050817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/15/2022] [Accepted: 04/16/2022] [Indexed: 01/27/2023] Open
Abstract
The intensification of oxidative stress and destabilization of the antioxidative defenses of an organism is a consequence of many environmental factors. We considered aspects conditioning male reproductive potential and the functionality of enzymatic antioxidative mechanisms, i.e., superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione reductase (GR), and their correlations with Li, Be, B, Na, Mg, Al, P, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Mo, Ag, Cd, Sn, Sb, Ba, Hg, Tl, Pb, and malondialdehyde (MDA), as well as genetic polymorphism IL-4v.C589T (rs2243250) in men with infertility (n = 76). A healthy normozoospermic control (n = 87) was also used. We assessed the impact of negative changes driven by oxidative stress on enzymatic antioxidative mechanisms as well as the role of MDA in the overall process. On this basis, we infer connections between disturbances in enzymatic antioxidative defense and reproductive potential. Based on a molecular analysis of the polymorphism of gene IL-4v.C589T (rs2243250) (chromosome 5) (PCR-RFLP), we considered the relationships among particular genotypes with the possibility of occurrence of male infertility. Concentrations of chemical elements were measured in the blood. The activity of antioxidants and MDA levels were measured in serum. In the infertile group, higher GPx activity was noted (6.56 nmoL·min-1·mL-1, control: 4.31 nmoL·min-1·mL-1; p = 0.004), while GR achieved a greater level in the control (17.74 nmoL·min-1·mL-1, infertile: 15.97 nmoL·min-1·mL-1, p = 0.043), which implies diversified efficiency of the first and second lines of defense. The polymorphism of IL-4v.C589T (rs2243250) was not directly connected with infertility because there were not any differences in the frequency of genotypes between the infertile and control group (p = 0.578). An analysis of genotypes CC and TT (polymorphism IL-4v.C589T (rs2243250)) indicated numerous correlations between antioxidants, chemical elements and MDA. Therefore, chemical economy, antioxidative defense and genetic conditions are connected and jointly shape male reproductive potential. Chemical elements influence antioxidative defense and male fertility; the most important modulators appeared to be Na, Ba, Al and B. The polymorphism of gene IL-4v.C589T (rs2243250) has a limited influence on antioxidative defense and the metabolism of chemical elements.
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Affiliation(s)
- Jędrzej Baszyński
- Department of Ecology and Environmental Protection, Department of Medical Biology and Biochemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, PL 85-094 Bydgoszcz, Poland; (J.B.); (E.S.); (K.H.-B.); (S.B.); (M.L.)
| | - Piotr Kamiński
- Department of Ecology and Environmental Protection, Department of Medical Biology and Biochemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, PL 85-094 Bydgoszcz, Poland; (J.B.); (E.S.); (K.H.-B.); (S.B.); (M.L.)
- Department of Biotechnology, Faculty of Biological Sciences, Institute of Biological Sciences, University of Zielona Góra, Prof. Z. Szafran St. 1, PL 65-516 Zielona Góra, Poland
| | - Maria Bogdzińska
- Department of Genetics and Animal Breeding, Faculty of Animal Breeding and Biology, UTP University of Science and Technology in Bydgoszcz, Hetmańska St. 33, PL 85-039 Bydgoszcz, Poland; (M.B.); (S.M.)
| | - Sławomir Mroczkowski
- Department of Genetics and Animal Breeding, Faculty of Animal Breeding and Biology, UTP University of Science and Technology in Bydgoszcz, Hetmańska St. 33, PL 85-039 Bydgoszcz, Poland; (M.B.); (S.M.)
| | - Marek Szymański
- Department of Obstetrics, Female Pathology and Oncological Gynecology, University Hospital No. 2, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Ujejski St. 75, PL 85-168 Bydgoszcz, Poland;
- NZOZ Medical Center Co., Waleniowa St. 24, PL 85-435 Bydgoszcz, Poland;
| | - Karolina Wasilow
- NZOZ Medical Center Co., Waleniowa St. 24, PL 85-435 Bydgoszcz, Poland;
- Family Medicine Clinic, University Hospital No. 2, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Ujejski St. 75, PL 85-168 Bydgoszcz, Poland
| | - Emilia Stanek
- Department of Ecology and Environmental Protection, Department of Medical Biology and Biochemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, PL 85-094 Bydgoszcz, Poland; (J.B.); (E.S.); (K.H.-B.); (S.B.); (M.L.)
| | - Karolina Hołderna-Bona
- Department of Ecology and Environmental Protection, Department of Medical Biology and Biochemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, PL 85-094 Bydgoszcz, Poland; (J.B.); (E.S.); (K.H.-B.); (S.B.); (M.L.)
| | - Sylwia Brodzka
- Department of Ecology and Environmental Protection, Department of Medical Biology and Biochemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, PL 85-094 Bydgoszcz, Poland; (J.B.); (E.S.); (K.H.-B.); (S.B.); (M.L.)
| | - Rafał Bilski
- Department of Medical Biology and Biochemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Karłowicz St. 24, PL 85-092 Bydgoszcz, Poland; (R.B.); or (A.W.)
| | - Halyna Tkachenko
- Department of Biology, Institute of Biology and Earth Sciences, Pomeranian University in Słupsk, K. Arciszewski St. 22 B, PL 76-200 Słupsk, Poland; (H.T.); (N.K.)
| | - Natalia Kurhaluk
- Department of Biology, Institute of Biology and Earth Sciences, Pomeranian University in Słupsk, K. Arciszewski St. 22 B, PL 76-200 Słupsk, Poland; (H.T.); (N.K.)
| | - Tomasz Stuczyński
- Department of Soil Structure, Institute of Soil and Plant Cultivation-Government Scientific Institute, Czartoryskich St. 8, PL 24-100 Puławy, Poland; or
- Faculty of Mathematics Informatics and Landscape Architecture, The John Paul II Catholic University of Lublin, Konstantynów 1 H, PL 20-708 Lublin, Poland
| | - Małgorzata Lorek
- Department of Ecology and Environmental Protection, Department of Medical Biology and Biochemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Skłodowska-Curie St. 9, PL 85-094 Bydgoszcz, Poland; (J.B.); (E.S.); (K.H.-B.); (S.B.); (M.L.)
| | - Alina Woźniak
- Department of Medical Biology and Biochemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, M. Karłowicz St. 24, PL 85-092 Bydgoszcz, Poland; (R.B.); or (A.W.)
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Association of BST1 polymorphism with idiopathic restless legs syndrome in Chinese population. Sleep Breath 2021; 25:1987-1993. [PMID: 33625657 DOI: 10.1007/s11325-021-02326-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 02/07/2021] [Accepted: 02/12/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Parkinson's disease (PD) and restless legs syndrome/Willis-Ekbom disease (RLS/WED) are both common movement disorders. Based on their clinical overlap, association studies of PD and RLS/WED have been conducted for many years. OBJECTIVE To investigate whether or not the genetic risk factor of PD was also associated with RLS/WED. SUBJECTS AND METHODS We included 102 idiopathic RLS/WED patients and 189 matched controls from southeast China. The clinical data included the International Restless Legs Syndrome Study Group Rating Scale, the subtypes of RLS/WED symptoms (painful or other discomfort), the comorbidities, the pregnancy history of female patients, the Hamilton Depression Scale (HAMD), and the Pittsburgh Sleep Quality Index (PSQI) questionnaire. Risk gene analysis between RLS/WED and control groups including 21 SNPs (single nucleotide polymorphisms) was conducted. Genotyping was done by Sanger sequencing. RESULTS We found that rs4273468 polymorphism of BST1 gene increased the risk of idiopathic RLS/WED patients in southeastern Chinese population (P = <0.001, OR = 2.85, p = 0.019 after Bonferroni correction). Moreover, the haplotype of G-G (rs4698412-rs4273468) was significantly associated with Chinese RLS/WED patients (p = <0.001). CONCLUSION BST1 may contribute to the development of RLS/WED. Further studies on larger cohorts are needed to confirm these findings.
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Zhang Q, Nong Y, Liu Z, Gong L. Proteinase K Combining Two-Step Liquid–Liquid Extraction for Plasma Untargeted Liquid Chromatography–Mass Spectrometry-Based Metabolomics To Discover the Potential Mechanism of Colorectal Adenoma. Anal Chem 2019; 91:14458-14466. [DOI: 10.1021/acs.analchem.9b03121] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Qisong Zhang
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People’s Republic of China
- Guangdong Key Laboratory for Translational Cancer Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People’s Republic of China
| | - Yanying Nong
- Guangdong Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, People’s Republic of China
| | - Zhongqiu Liu
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People’s Republic of China
- Guangdong Key Laboratory for Translational Cancer Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People’s Republic of China
| | - Lingzhi Gong
- International Institute for Translational Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People’s Republic of China
- Guangdong Key Laboratory for Translational Cancer Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People’s Republic of China
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Chen J, Huang P, He Y, Shen J, Du J, Cui S, Chen S, Ma J. IL1B polymorphism is associated with essential tremor in Chinese population. BMC Neurol 2019; 19:99. [PMID: 31092216 PMCID: PMC6518722 DOI: 10.1186/s12883-019-1331-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 05/08/2019] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND The aim of the study was to investigate the genetic risk factors of essential tremor (ET) in Chinese Population. METHODS A total of 225 ET patients (25 ET patients also had restless legs syndrome (RLS) and were excluded from final analysis) and 229 controls were recruited. The diagnosis of ET was based on the Consensus Statement of the Movement Disorders Society on tremor. Polymerase chain reaction (PCR) and sequencing were used to detect 12 single nucleotide polymorphisms (SNPs) in seven candidate genes for RLS (HMOX1, HMOX2, VDR, IL17A, IL1B, NOS1 and ADH1B). RESULTS We found that one SNP was associated with the risk of ET in Chinese population after adjusting for age and gender: rs1143633 of IL1B (odds ratio [OR] =2.57, p = 0.003, recessive model), and the statistical result remained significant after Bonferroni correction. Then, we performed a query in Genotype-tissue Expression (GTEx), Brain eQTL Almanac (Braineac) databases and Blood expression quantitative trait loci (eQTL) browser. The significant association was only found between genotype at rs1143633 and IL1B expression level of putamen and white matter in Braineac database, which was more prominent with homozygous (GG) carriers. CONCLUSIONS Our study firstly reported the association of IL1B polymorphism with the risk of ET in Chinese population. However, the association might only suggest a marker of IL1B SNP associated with ET instead of the casual variant. Further studies are needed to confirm our finding.
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Affiliation(s)
- Jie Chen
- Department of Neurology & Co-innovation Center of Neuroregeneration, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Pei Huang
- Department of Neurology & Co-innovation Center of Neuroregeneration, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Yachao He
- Department of Neurology & Co-innovation Center of Neuroregeneration, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Junyi Shen
- Department of Neurology & Co-innovation Center of Neuroregeneration, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Juanjuan Du
- Department of Neurology & Co-innovation Center of Neuroregeneration, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Shishuang Cui
- Department of Neurology & Co-innovation Center of Neuroregeneration, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Shengdi Chen
- Department of Neurology & Co-innovation Center of Neuroregeneration, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China.
| | - Jianfang Ma
- Department of Neurology & Co-innovation Center of Neuroregeneration, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China.
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Sulek A, Lusakowska A, Krysa W, Rajkiewicz M, Kaminska A, Nojszewska M, Kostera-Pruszczyk A, Zdzienicka E, Kubalska J, Rakowicz M, Szirkowiec W, Kwiecinski H, Zaremba J. WITHDRAWN: Evidence for a relatively high proportion of DM2 mutations in a large group of Polish patients. Neurol Neurochir Pol 2018:S0028-3843(18)30152-X. [PMID: 29880430 DOI: 10.1016/j.pjnns.2018.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 04/12/2018] [Indexed: 11/24/2022]
Abstract
The Publisher regrets that this article is an accidental duplication of an article that has already been published, 10.1016/j.pjnns.2018.02.008. The duplicate article has therefore been withdrawn. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.
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Affiliation(s)
- Anna Sulek
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland.
| | | | - Wioletta Krysa
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Marta Rajkiewicz
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Anna Kaminska
- Department of Neurology, Medical University, Warsaw, Poland
| | | | | | - Elzbieta Zdzienicka
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Jolanta Kubalska
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Maria Rakowicz
- Department of Clinical Neurophysiology, Institute of Psychiatry and Neurology, Warsaw, Poland
| | | | | | - Jacek Zaremba
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
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Sulek A, Lusakowska A, Krysa W, Rajkiewicz M, Kaminska A, Nojszewska M, Kostera-Pruszczyk A, Zdzienicka E, Kubalska J, Rakowicz M, Szirkowiec W, Kwiecinski H, Zaremba J. Evidence for a relatively high proportion of DM2 mutations in a large group of Polish patients. Neurol Neurochir Pol 2018; 52:736-742. [PMID: 29588063 DOI: 10.1016/j.pjnns.2018.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 02/16/2018] [Accepted: 02/26/2018] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Myotonic dystrophies (DMs) type 1 (DM1) and type 2 (DM2) are autosomal dominant, multisystem disorders, considered the most common dystrophies in adults. DM1 and DM2 are caused by dynamic mutations in the DMPK and CNBP genes, respectively. METHODS Molecular analyses were performed by PCR and the modified RP-PCR in patients, in their at-risk relatives and prenatal cases. RESULTS The analysis of Polish controls revealed the range of 5-31 CTG repeats for DM1 and 110-228 bp alleles for DM2. Among 318 confirmed probands - 196 (62%) were DM1 and 122 (38%) - DM2. Within DM1families, 10 subjects carried a low expanded CTG tract (< 100 repeats), which resulted in a full mutation in subsequent generations. Two related individuals had unstable alleles-188 bp and 196 bp without common interruptions. CONCLUSION The relative frequencies of DM1/DM2 among Polish patients were 68% and 32%, respectively, with a relatively high proportion of DM2 mutations (1.6:1).
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Affiliation(s)
- Anna Sulek
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland.
| | - Anna Lusakowska
- Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | - Wioletta Krysa
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Marta Rajkiewicz
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Anna Kaminska
- Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | - Monika Nojszewska
- Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | | | - Elzbieta Zdzienicka
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Jolanta Kubalska
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Maria Rakowicz
- Department of Clinical Neurophysiology, Institute of Psychiatry and Neurology, Warsaw, Poland
| | | | - Hubert Kwiecinski
- Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | - Jacek Zaremba
- Department of Genetics, Institute of Psychiatry and Neurology, Warsaw, Poland
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Li G, Tang H, Wang C, Qi X, Chen J, Chen S, Ma J. Association of BTBD9 and MAP2K5/SKOR1 With Restless Legs Syndrome in Chinese Population. Sleep 2017; 40:3045871. [PMID: 28329290 DOI: 10.1093/sleep/zsx028] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Study Objectives The aim of the study was to investigate the relationship between genetic factors and primary restless legs syndrome (RLS) in Chinese population. Methods A total of 116 RLS patients and 200 controls were recruited and the diagnosis of RLS was based on the criteria of International RLS Study Group. Polymer chain reaction (PCR) and sequencing were used to detect 19 single nucleotide polymorphisms (SNPs) in six genetic loci (MEIS1, BTBD9, PTPRD, MAP2K5/SKOR1, TOX3, and Intergenic region of 2p14). Results Our study found that one SNP increased the risk of RLS in Chinese population: rs6494696 of MAP2K5/SKOR1 (odds ratio [OR] = 0.09, p < .0001, recessive model). A further meta-analysis of RLS in Asian population found that two SNPs of BTBD9 increased the risk of RLS: rs9296249 of BTBD9 (OR = 1.44, p = .000, T allele), rs9357271 of BTBD9 (OR = 1.38, p = .021, dominant model). Conclusion Our results confirmed the association of BTBD9 and MAP2K5/SKOR1 with primary RLS in Chinese population.
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Affiliation(s)
- Gen Li
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Huidong Tang
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Cheng Wang
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xuemei Qi
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jie Chen
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Shengdi Chen
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jianfang Ma
- Department of Neurology and Institute of Neurology, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
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Miri-Moghaddam E, Bahrami S, Naderi M, Bazi A, Karimipoor M. Xmn1-158 γGVariant in B-Thalassemia Intermediate Patients in South-East of Iran. Int J Hematol Oncol Stem Cell Res 2017; 11:165-171. [PMID: 28875012 PMCID: PMC5575729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background: Xmn-1 polymorphism of 𝜸Gglobin gene (HBG2) is a prominent quantitative trait loci (QTL) in β-thalassemia intermediate (β-TI). In current study, we evaluated the frequency of Xmn-1 polymorphism and its association with β-globin gene (HBB) alleles and Hb F level in β-TI patients in Sistan and Balouchestan province, south-east of Iran. Subjects and Methods: 45 β-TI patients were enrolled. HBB gene mutations and Xmn-1 polymorphism were determined by amplification-refractory mutation system (ARMS) PCR method. Hemoglobin profile was determined using capillary electrophoresis. Results: The study participants consisted of 26 (58%) males and 19 (42%) females. Mean age of the patients was 10.7±3.1 years old. Overall, Xmn-1 polymorphism was observed in 28 (62%) patients. Homozygous (TT) and heterozygous (CT) genotypes of the polymorphism represented with frequencies of 12 (26%) and 16 (35%), respectively. Main recognized HBB gene mutation was IVSI-5(G>C) with homozygous frequency of 44%. Non-zero (β+) alleles of HBB gene constituted 11.1 % (4 patients with heterozygous β+ and one with homozygous β+ genotype). Hb F level was significantly higher in patients with at least one Xmn-1allele (67.9±[Formula: see text]17.9%) than those without the polymorphism (19.5±20.3%, P<0.0001). Also, patients with homozygous genotype demonstrated significantly higher Hb F compared to heterozygous (CT) cases (respective percentages of 85±[Formula: see text]6.8 and 54.7±[Formula: see text]10.5, p<0.0001). Conclusion: Our results highlighted the role of Xmn-1 polymorphism as the main phenotypic modifier in β-TI patients in Sistan and Balouchestan province.
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Affiliation(s)
- Ebrahim Miri-Moghaddam
- Associate Professor, Genetics of Non-Communicable Disease Research Center, zahedan University of Medical Sciences, zahedan, Iran,CardioVascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Sara Bahrami
- Msc in Biology, Department of Biology, Payame Noor University, Zahedan, Iran
| | - Majid Naderi
- Assistant Professor, Genetics of Non-Communicable Diseases Research Center, Department of Pediatric Hematology & Oncology, Faculty of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Ali Bazi
- Msc in Hematology, Faculty of Allied Medical Sciences, Zabol University of Medical Sciences, Zabol, Iran
| | - Morteza Karimipoor
- Ph.D, Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
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Chen XP, Xiong HR, Zhu N, Chen QZ, Wang H, Zhong CJ, Wang MR, Lu S, Luo F, Hou W. Lack of association between integrin α vβ 3 gene polymorphisms and hemorrhagic fever with renal syndrome in Han Chinese from Hubei, China. Virol Sin 2017; 32:73-79. [PMID: 28190175 DOI: 10.1007/s12250-016-3888-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 01/04/2017] [Indexed: 11/28/2022] Open
Abstract
Hantaviruses belong to the family Bunyaviridae and cause hemorrhagic fever with renal syndrome (HFRS) in humans. β3 integrins, including αVβ3 and αIIbβ3 integrins, act as receptors on endothelial cells and play key roles in cellular entry during the pathogenesis of hantaviruses. Previous study demonstrated that the polymorphisms of integrin αIIbβ3 are associated with susceptibility to hantavirus infection and the disease severity of HFRS in Shaanxi Province of China, rather than in Finland. However, the polymorphisms of integrin αvβ3 in patients with HFRS was incompletely understood. Here, we aimed to investigate the associations between polymorphisms in human integrin αvβ3 and HFRS in Han Chinese individuals. Ninety patients with HFRS and 101 healthy controls were enrolled in this study. Analysis of five single nucleotide polymorphism (SNP) sites (rs3768777 and rs3738919 on ITGAV; rs13306487, rs5921, and rs5918 on ITGB3) was performed by TaqMan SNP genotyping assays and bi-directional PCR allele-specific amplification method. No significant differences were observed between the HFRS group and controls regarding the genotype and allele frequency distributions of any of the five SNP sites, and no associations were found between ITGAV polymorphisms/genotypes and disease severity. In conclusion, our results implied that these five SNPs in the integrin αvβ3 gene were not associated with HFRS susceptibility or severity in Han Chinese individuals in Hubei Province.
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Affiliation(s)
- Xiao-Ping Chen
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Hai-Rong Xiong
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Ni Zhu
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Qing-Zhou Chen
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Hui Wang
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Chao-Jie Zhong
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Mei-Rong Wang
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Shuang Lu
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Fan Luo
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Wei Hou
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China.
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Miri-Moghaddam E, Bahrami S, Naderi M, Bazi A, Karimipoor M. Molecular Characterization of β-Thalassemia Intermedia in Southeast Iran. Hemoglobin 2017; 40:173-8. [PMID: 27117567 DOI: 10.3109/03630269.2016.1167735] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Inheritance of mild mutations within the β-globin gene and coinheritance of α-thalassemia (α-thal) are known as two important genetic modifiers in β-thalassemia (β-thal) intermedia (β-TI). We aimed to evaluate the spectrum of β- and α-thal mutations in β-TI patients in Southeast Iran. Common β- and α-globin gene mutations were detected by amplification refractory mutation system-polymerase chain reaction (ARMS-PCR) and multiplex gap-PCR, respectively. There were 26 male (57.8%) and 19 female (42.2%) patients. HBB: c.92 + 5T > C [IVS-I-5 (G > C)] and HBB: c.-138C + 1G > A [IVS-II-I (G > A)] represented the prevalent alleles with respective frequencies of 60.0 and 10.0%. Other β-globin mutations included HBB: c.-138C > T [-88 (C > T)], HBB: c.27_28insG [frameshift codons (FSC) 8/9 (+G)], HBB: c.46delT [codon 15 (-T)], HBB: c.93-22_95del (IVS-I, 25 del), and the 619 bp deletion (NG_000007.3: g.71609_72227del619). The predominant genotypic combinations were β(0)/β(0) (68.9%), β(0)/β(+ )(8.9%) and β(+)/β(+ )(2.2%). Coinheritance of α-thal was observed in 33.0% of the patients, with the -α(3.7) (rightward) (NG_000006.1: g.34164_37967del3804) as the most common deletion (86.0%). One patient was diagnosed with the -α(4.2) (leftward) (AF221717) and one with the - -(MED) (g.24664_41064del16401) deletions, while no patients carried the -(α)(20.5) (g.15164_37864del22701), α(-5 nt) (HBA2: c.95 + 2_95_6delTGAGG) or codon 19 (-G) (HBA2: c.56delG) mutations. The alleviating molecular mechanism was not explainable by β(+ )or concurrent α-thal in more than half of our β-TI patients. This encourages conducting more studies to identify other contributing factors, especially Hb F-inducing genetic modifiers.
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Affiliation(s)
- Ebrahim Miri-Moghaddam
- a Genetics of Non-Communicable Disease Research Center, Zahedan University of Medical Sciences , Zahedan , Iran.,b Department of Genetics , Faculty of Medicine, Zahedan University of Medical Sciences , Zahedan , Iran
| | - Sara Bahrami
- c Department of Biology , Payame Noor University , Zahedan , Iran
| | - Majid Naderi
- d Genetics of Non-Communicable Disease Research Center, Zahedan University of Medical Sciences , Zahedan , Iran.,e Department of Pediatric Hematology & Oncology , Faculty of Medicine, Zahedan University of Medical Sciences , Zahedan , Iran
| | - Ali Bazi
- f Faculty of Allied Medical Sciences , Zabol University of Medical Sciences , Zabol , Iran
| | - Morteza Karimipoor
- g Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran , Tehran , Iran
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Dar R, Rasool S, Zargar AH, Jan TR, Andrabi KI. Polymorphic analysis of MC4R gene in ethnic Kashmiri population with type 2 diabetes. Int J Diabetes Dev Ctries 2015. [DOI: 10.1007/s13410-015-0454-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Zhang X, Cao X, Xu X, Li A, Xu Y. Correlation between the -1562C/T polymorphism in the matrix metalloproteinase-9 gene and hemorrhagic transformation of ischemic stroke. Exp Ther Med 2015; 9:1043-1047. [PMID: 25667675 PMCID: PMC4316928 DOI: 10.3892/etm.2015.2186] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 12/17/2014] [Indexed: 12/04/2022] Open
Abstract
The aim of the present study was to investigate the correlation between the −1562C/T polymorphism in an intron of the matrix metalloproteinase-9 (MMP-9) gene and hemorrhagic transformation of ischemic stroke (IS). Using polymerase chain reaction-restriction fragment length polymorphism, the −1562C/T polymorphisms in 222 patients with IS were detected. The patients were divided into hemorrhagic transformation (HT; 84 cases) and non-hemorrhagic transformation (NHT) groups (138 cases) depending on the results from the susceptibility-weighted magnetic resonance imaging, which was performed between one and two weeks following stroke onset. The allele frequencies were subsequently compared. Baseline data of the two groups were comparable. The HT group exhibited a significantly lower frequency of the CT+TT genotype compared with the NHT group (17.86 vs. 30.43%, P<0.05). In addition, the frequency of T allele was significantly lower in the HT group compared with the NHT group (8.93 vs. 15.94%, P<0.05). Therefore, the results indicated that the −1562C/T polymorphism in the MMP-9 gene is correlated with hemorrhagic transformation of IS in the population studied. Furthermore, the T allele may be a protective factor for hemorrhagic transformation of IS in this population.
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Affiliation(s)
- Xiaoman Zhang
- Department of Neurology, The First People's Hospital of Zhengzhou, Zhengzhou, Henan 450004, P.R. China
| | - Xinhui Cao
- Department of Neurology, The First People's Hospital of Zhengzhou, Zhengzhou, Henan 450004, P.R. China
| | - Xiaoyu Xu
- Department of Neurology, The First People's Hospital of Zhengzhou, Zhengzhou, Henan 450004, P.R. China
| | - Aifan Li
- Department of Neurology, The First People's Hospital of Zhengzhou, Zhengzhou, Henan 450004, P.R. China
| | - Yuming Xu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
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Laczmanska I, Gil J, Karpinski P, Stembalska A, Trusewicz A, Pesz K, Ramsey D, Schlade-Bartusiak K, Blin N, Sasiadek MM. Polymorphism in nucleotide excision repair gene XPC correlates with bleomycin-induced chromosomal aberrations. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2007; 48:666-71. [PMID: 17685459 DOI: 10.1002/em.20333] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Chromosomal aberrations (CAs) are important genetic alterations in the development and progression of the majority of human cancers. The frequency with which such alterations occur depends to a large extent on polymorphisms of DNA-repair genes and in genes coding for xenobiotic metabolizing enzymes, which are involved in the processes of activation and inactivation of xenobiotics. The frequency of bleomycin (BLM)-induced CAs is an indirect measure of the effectiveness of DNA repair mechanisms, and a predictor of environment-related risk of cancer. Our study was conducted on the human peripheral blood lymphocytes of 82 healthy volunteers. The aim of the study was to elucidate whether the frequency of BLM-induced CAs is correlated with polymorphisms of selected genes involved in different mechanisms of DNA repair such as: XRCC1 [base excision repair]; XPA, XPC, XPG, XPD, XPF, ERCC1 [nucleotide excision repair], NBS1, RAD51, XRCC2, XRCC3, RAD51, and BRCA1 [homologous recombination], as well as in genes encoding xenobiotic metabolizing enzymes, such as CYP1A, CYP2E1, NAT2, GSTT1, and EPHX (mEH). Our study indicated that, of the polymorphisms studied, only XPC (exon 15 and intron 11) is associated with BLM-induced CAs, suggesting a role of the NER pathway in the repair of BLM-induced chromosomal aberrations.
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Affiliation(s)
- Izabela Laczmanska
- Department of Genetics, Wroclaw Medical University, Marcinkowskiego 1, Wroclaw, Poland
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16
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Laczmanska I, Gil J, Karpinski P, Stembalska A, Kozlowska J, Busza H, Trusewicz A, Pesz K, Ramsey D, Schlade-Bartusiak K, Blin N, Sasiadek MM. Influence of polymorphisms in xenobiotic-metabolizing genes and DNA-repair genes on diepoxybutane-induced SCE frequency. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2006; 47:666-73. [PMID: 17078101 DOI: 10.1002/em.20253] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Analysis of the combined effects of polymorphisms in genes encoding xenobiotic metabolizing enzymes (XMEs) and DNA repair proteins may be a key to understanding the role of these genes in the susceptibility of individuals to mutagens. In the present study, we performed an in vitro experiment on lymphocytes from 118 healthy donors that measured the frequency of diepoxybutane (DEB) induced sister chromatid exchanges (SCEs) in relation to genetic polymorphisms in genes coding for XMEs (CYP1A1, CYP2E1, GSTT1, EPHX, and NAT2), as well as DNA repair proteins (XRCC1, XRCC2, XRCC3, XPD, XPA, XPC, XPG, XPF, ERCC1, BRCA1, NBS1, and RAD51). We found that GSTT1(-) and CYP2E1 c1/c2 polymorphisms were associated with higher DEB-induced SCE frequencies, and that NAT2 G(590)A was associated with lower SCE induction by DEB. Analysis of the effect of pairs of genes showed that for a fixed GSTT1 genotype, the SCE level increased with an increasing number of Tyr alleles in EPHX codon 113. We found that among GSTT1(+) individuals the DEB-induced SCE level was significantly lower when the EPHX 139 codon was His/Arg rather than His/His. An interaction between polymorphisms in CYP2E1 and at EPHX codon 113 was also observed. The results of our study confirm observations in cancer patients and in people exposed to xenobiotics indicating that sensitivity to mutagens depends upon a combined effect of a variety of "minor impact" genes. Moreover, our results indicate that polymorphisms in genes coding for XMEs have a greater influence on the genotoxic activity of DEB, measured by DEB-induced SCE frequency, than polymorphisms in genes encoding DNA repair proteins.
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Merk S, Meyer H, Greiser-Wilke I, Sprague LD, Neubauer H. Detection of Burkholderia cepacia DNA from artificially infected EDTA-blood and lung tissue comparing different DNA isolation methods. ACTA ACUST UNITED AC 2006; 53:281-5. [PMID: 16907960 DOI: 10.1111/j.1439-0450.2006.00956.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Bacterial DNA (Burkholderia cepacia) was prepared from artificially infected equine ethylenediaminetetraacetic acid (EDTA)-blood and lung tissue by using four standard methods (lysis buffer containing proteinase K, phenol/chloroform/isoamylalcohol-extraction, microwave-treatment, heat treatment) and six commercially available kits (Puregene, High Pure PCR Template Preparation Kit, InstaGene, QiaAmp Tissue Kit, DNAzol and Elu-Quik). After a subsequent polymerase chain reaction (PCR), their efficacy and sensitivity were compared. Concerning the detection limits, the simple lysis with a proteinase K-containing buffer led to the best results for EDTA-blood as well as for artificially infected lung tissue.
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Affiliation(s)
- S Merk
- Institut fuer Medizinische Informatik und Biomathematik, Domagkstrasse 9, 48149 Munster, Germany
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Krasteva ME, Georgieva EI. Germline p53 single-base changes associated with Balkan endemic nephropathy. Biochem Biophys Res Commun 2006; 342:562-7. [PMID: 16487937 DOI: 10.1016/j.bbrc.2006.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Accepted: 02/02/2006] [Indexed: 01/15/2023]
Abstract
The Balkan endemic nephropathy (BEN) is a significant clinical and scientific problem in need of novel effective therapies. Though many genetic and environmental factors have been investigated the basis, cause, and predisposition to BEN are still unclear. In this study, based on the hypothesis that the genetic pathways leading to BEN might be associated with p53 dysfunction, we screened for p53 gene mutations 90 Bulgarian BEN patients using optimized PCR-SSCP-sequencing analysis. Germline p53 single-base changes were found in blood samples in 10% of BEN cases. Three of them caused amino acid substitutions (p.Arg283Cys, p.Gln317His, and p.Lys321Glu); the other six were either synonymous amino acid substitutions (p.Arg213Arg) or intron polymorphisms (T14766C). To the best of our knowledge, these are the first data investigating tumor suppressor gene mutations in patients with BEN. The obtained results are in support of our hypothesis that p53 gene alterations are possibly involved in BEN genetic pathways.
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Affiliation(s)
- Maria Emileva Krasteva
- Institute of Genetics, Department of Molecular Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria
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Katsoulis J, Lang NP, Persson GR. Proportional distribution of the red complex and its individual pathogens after sample storage using the checkerboard DNA-DNA hybridization technique. J Clin Periodontol 2005; 32:628-33. [PMID: 15882222 DOI: 10.1111/j.1600-051x.2005.00727.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Information on the impact of sample storage prior to analysis by DNA methods is limited. AIMS To investigate the effect of microbial sample storage on bacterial detection and proportional distribution of the red complex and its individual pathogens. MATERIAL AND METHODS Subgingival plaque samples were analysed by (1) immediate processing, (2) after storage at +4 degrees C for 6 weeks, (3) after storage at -20 degrees C for 6 months or (4) after storage at -20 degrees C for 12 months using the checkerboard DNA-DNA hybridization. RESULTS Proportional distribution of the red complex did not differ between the first three protocols. However, the total bacterial DNA for pathogens studied decreased significantly in protocols 3 and 4. Relative amounts of Tannerella forsythensis, Porphyromonas gingivalis and Treponema denticola remained stable in the second protocols and changed in an unpredictable way if stored for 6 or 12 months. CONCLUSIONS Results from samples stored for maximum 6 months at -20 degrees C with high proportional amounts of the red complex and T. denticola may be used as an indicator of persistence. All bacterial samples for DNA extraction should be processed following a standardized storage protocol (i.e. samples stored at +4 degrees C for maximum 6 weeks) in order to get comparable qualitative and quantitative results for total DNA, bacterial complexes and individual pathogens. Most representative results are yielded if processing and hybridization could be performed immediately after sampling.
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Affiliation(s)
- Joannis Katsoulis
- Department of Periodontology and Fixed Prosthodontics, School of Dental Medicine, University of Bern, CH-3010 Bern, Switzerland
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Spanakis E. Human DNA Sampling and Banking. MOLECULAR GENETIC EPIDEMIOLOGY — A LABORATORY PERSPECTIVE 2002. [DOI: 10.1007/978-3-642-56207-5_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Dickinson JL, Sale MM, Craig JE, Mackey DA. Laboratory methods in ophthalmic genetics: obtaining DNA from patients. Ophthalmic Genet 2001; 22:49-60. [PMID: 11262650 DOI: 10.1076/opge.22.1.49.2240] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
DNA samples are the fundamental research substrate in genetics. Although methodology and cost-effectiveness in molecular biology have improved dramatically, collecting biological samples and extracting DNA continue to be expensive and time-consuming steps of genetic research. This article reviews the issues surrounding the choice of biological samples for methods of DNA extraction as well as the storage and transport of biological and DNA samples for genetic studies.
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Affiliation(s)
- J L Dickinson
- Menzies Centre for Population Health Research, University of Tasmania, Hobart, Tasmania, Australia
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Leal-Klevezas DS, Martínez-Vázquez IO, Cuevas-Hernández B, Martínez-Soriano JP. Antifreeze solution improves DNA recovery by preserving the integrity of pathogen-infected blood and other tissues. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 2000; 7:945-6. [PMID: 11063503 PMCID: PMC95990 DOI: 10.1128/cdli.7.6.945-946.2000] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Preserving blood samples for shipping and later DNA extraction has been performed by cooling, freezing, drying, freeze-drying, and protease treatment, among other methods. Most methods to preserve field samples for further DNA extraction do not prevent cellular and DNA damage or are useful only in preserving them for short periods. This report introduces a novel method for blood and tissue that allows preservation in freezing temperatures for a prolonged period of time. The solution reported here (20% ethylene glycol-propylene glycol) preserves cells and tissues integrity, as judged by microscopic analysis, and improves DNA yield and quality.
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Affiliation(s)
- D S Leal-Klevezas
- Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
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