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Abstract
Familial hypercholesterolemia (FH) is considered the genetic cause of coronary heart disease and ischemic stroke. FH is mainly an autosomal codominant pattern-based disorder and is primarily determined by point mutations within the low-density lipoprotein receptor, apolipoprotein B, and proprotein convertase subtilisin/kexin type 9 genes, causing increased low-density lipoprotein cholesterol levels in the serum of untreated individuals. The accumulation will eventually lead to atherosclerotic cardiovascular disease. Although clinical criteria comprising several prognosis scores, such as the Simon Broome, Dutch Lipid Clinic Network, Make Early Diagnosis to Prevent Early Death, and the recently proposed Montreal-FH-SCORE, are the conventional basis of diagnosing FH, the genetic diagnosis made by single nucleotide polymorphism genotyping, multiplex ligation-dependent probe amplification analysis, and sequencing (both Sanger and Next-Generation sequencing) offers unequivocal diagnosis. Given the heterogeneity of known mutations, the genetic diagnosis of FH is often difficult to establish, despite the growing evidence of the causative mutations, as well as the polygenic aspect of this pathology and the importance of cascade screening of the FH patient’s healthy family members. This review article details different genetic techniques that can be used in FH identification when there is a clinical FH suspicion based on criteria comprised in prognosis scores, knowing that none of these are exhaustive in the diagnosis, yet they efficaciously overlap and complement each other for confirming the disease at the molecular level.
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2
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Guo Q, Feng X, Zhou Y. PCSK9 Variants in Familial Hypercholesterolemia: A Comprehensive Synopsis. Front Genet 2020; 11:1020. [PMID: 33173529 PMCID: PMC7538608 DOI: 10.3389/fgene.2020.01020] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 08/10/2020] [Indexed: 01/22/2023] Open
Abstract
Autosomal dominant familial hypercholesterolemia (FH) affects approximately 1/250, individuals and potentially leads to elevated blood cholesterol and a significantly increased risk of atherosclerosis. Along with improvements in detection and the increased early diagnosis and treatment, the serious burden of FH on families and society has become increasingly apparent. Since FH is strongly associated with proprotein convertase subtilisin/kexin type 9 (PCSK9), increasing numbers of studies have focused on finding effective diagnostic and therapeutic methods based on PCSK9. At present, as PCSK9 is one of the main pathogenic FH genes, its contribution to FH deserves more explorative research.
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Affiliation(s)
- Qianyun Guo
- Beijing Key Laboratory of Precision Medicine of Coronary Atherosclerotic Disease, Department of Cardiology, Beijing Anzhen Hospital, Clinical Center for Coronary Heart Disease, Beijing Institute of Heart Lung and Blood Vessel Disease, Capital Medical University, Beijing, China
| | - Xunxun Feng
- Beijing Key Laboratory of Precision Medicine of Coronary Atherosclerotic Disease, Department of Cardiology, Beijing Anzhen Hospital, Clinical Center for Coronary Heart Disease, Beijing Institute of Heart Lung and Blood Vessel Disease, Capital Medical University, Beijing, China
| | - Yujie Zhou
- Beijing Key Laboratory of Precision Medicine of Coronary Atherosclerotic Disease, Department of Cardiology, Beijing Anzhen Hospital, Clinical Center for Coronary Heart Disease, Beijing Institute of Heart Lung and Blood Vessel Disease, Capital Medical University, Beijing, China
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3
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A systematic review of LDLR, PCSK9, and APOB variants in Asia. Atherosclerosis 2020; 305:50-57. [DOI: 10.1016/j.atherosclerosis.2020.05.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 04/18/2020] [Accepted: 05/07/2020] [Indexed: 01/08/2023]
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4
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Rodionov RN, Begmatov H, Jarzebska N, Patel K, Mills MT, Ghani Z, Khakshour D, Tamboli P, Patel MN, Abdalla M, Assaf M, Bornstein SR, Millan JL, Bode-Böger SM, Martens-Lobenhoffer J, Weiss N, Savinova OV. Homoarginine Supplementation Prevents Left Ventricular Dilatation and Preserves Systolic Function in a Model of Coronary Artery Disease. J Am Heart Assoc 2019; 8:e012486. [PMID: 31304837 PMCID: PMC6662144 DOI: 10.1161/jaha.119.012486] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Background Homoarginine (hArg) has been shown to be cardioprotective in a model of ischemic heart failure; however, the mechanism remains unknown. hArg can inhibit tissue‐nonspecific alkaline phosphatase (TNAP), an enzyme that promotes vascular calcification. We hypothesized that hArg will exert beneficial effects by reducing calcification in a mouse model of coronary artery disease associated with TNAP overexpression and hypercholesterolemia. Methods and Results TNAP was overexpressed in the endothelium in mice homozygous for a low‐density lipoprotein receptor mutation (wicked high cholesterol [WHC] allele). WHC and WHC–endothelial TNAP mice received placebo or hArg supplementation (14 mg/L in drinking water) starting at 6 weeks of age simultaneously with an atherogenic diet. Outcomes were compared between the groups after 4 to 5 weeks on treatment. Experiments were performed in males, which presented a study limitation. As expected, WHC–endothelial TNAP mice on the placebo had increased mortality (median survival 27 days, P<0.0001), increased coronary calcium and lipids (P<0.01), increased left ventricular end‐diastolic diameter (P<0.0001), reduced ejection fraction (P<0.05), and increased myocardial fibrosis (P<0.0001) compared with WHC mice. Contrary to our hypothesis, hArg neither inhibited TNAP activity in vivo nor reduced coronary artery calcification and atherosclerosis in WHC–endothelial TNAP mice; however, compared with the placebo, hArg prevented left ventricular dilatation (P<0.01), preserved ejection fraction (P<0.05), and reduced myocardial fibrosis (P<0.001). Conclusions The beneficial effect of hArg supplementation in the setting of calcified coronary artery disease is likely due to its direct protective actions on the myocardial response to the ischemic injury and not to the inhibition of TNAP activity and calcification.
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Affiliation(s)
- Roman N Rodionov
- 1 University Center for Vascular Medicine Technische Universität Dresden Dresden Germany
| | - Hoshimjon Begmatov
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Natalia Jarzebska
- 1 University Center for Vascular Medicine Technische Universität Dresden Dresden Germany.,3 Department of Anesthesiology and Intensive Care Unit Medicine Pulmonary Engineering Group University Hospital Carl Gustav Carus Technische Universität Dresden Dresden Germany
| | - Ketul Patel
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Matthew T Mills
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Zulaikha Ghani
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Doreen Khakshour
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Pankti Tamboli
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Mitul N Patel
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Mirette Abdalla
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Maryann Assaf
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
| | - Stefan R Bornstein
- 4 Department of Internal Medicine III University Hospital Carl Gustav Carus Technische Universität Dresden Dresden Germany
| | - Jose Luis Millan
- 5 Human Genetics Program Sanford Burnham Prebys Medical Discovery Institute La Jolla CA
| | | | | | - Norbert Weiss
- 1 University Center for Vascular Medicine Technische Universität Dresden Dresden Germany
| | - Olga V Savinova
- 2 Department of Biomedical Sciences New York Institute of Technology College of Osteopathic Medicine Old Westbury NY
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Romanelli F, Corbo A, Salehi M, Yadav MC, Salman S, Petrosian D, Rashidbaigi OJ, Chait J, Kuruvilla J, Plummer M, Radichev I, Margulies KB, Gerdes AM, Pinkerton AB, Millán JL, Savinov AY, Savinova OV. Overexpression of tissue-nonspecific alkaline phosphatase (TNAP) in endothelial cells accelerates coronary artery disease in a mouse model of familial hypercholesterolemia. PLoS One 2017; 12:e0186426. [PMID: 29023576 PMCID: PMC5638543 DOI: 10.1371/journal.pone.0186426] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 09/29/2017] [Indexed: 01/23/2023] Open
Abstract
OBJECTIVE Overexpression of tissue-nonspecific alkaline phosphatase (TNAP) in endothelium leads to arterial calcification in mice. The purpose of this study was to examine the effect of elevated endothelial TNAP on coronary atherosclerosis. In addition, we aimed to examine endogenous TNAP activity in human myocardium. APPROACH AND RESULTS A vascular pattern of TNAP activity was observed in human non-failing, ischemic, and idiopathic dilated hearts (5 per group); no differences were noted between groups in this study. Endothelial overexpression of TNAP was achieved in mice harboring a homozygous recessive mutation in the low density lipoprotein receptor (whc allele) utilizing a Tie2-cre recombinase (WHC-eTNAP mice). WHC-eTNAP developed significant coronary artery calcification at baseline compared WHC controls (4312 vs 0μm2 alizarin red area, p<0.001). Eight weeks after induction of atherosclerosis, lipid deposition in the coronary arteries of WHC-eTNAP was increased compared to WHC controls (121633 vs 9330μm2 oil red O area, p<0.05). Coronary lesions in WHC-eTNAP mice exhibited intimal thickening, calcifications, foam cells, and necrotic cores. This was accompanied by the reduction in body weight and left ventricular ejection fraction (19.5 vs. 23.6g, p<0.01; 35% vs. 47%, p<0.05). In a placebo-controlled experiment under atherogenic conditions, pharmacological inhibition of TNAP in WHC-eTNAP mice by a specific inhibitor SBI-425 (30mg*kg-1*d-1, for 5 weeks) reduced coronary calcium (78838 vs.144622μm2) and lipids (30754 vs. 77317μm2); improved body weight (22.4 vs.18.8g) and ejection fraction (59 vs. 47%). The effects of SBI-425 were significant in the direct comparisons with placebo but disappeared after TNAP-negative placebo-treated group was included in the models as healthy controls. CONCLUSIONS Endogenous TNAP activity is present in human cardiac tissues. TNAP overexpression in vascular endothelium in mice leads to an unusual course of coronary atherosclerosis, in which calcification precedes lipid deposition. The prevalence and significance of this mechanism in human atherosclerosis requires further investigations.
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MESH Headings
- Alkaline Phosphatase/antagonists & inhibitors
- Alkaline Phosphatase/genetics
- Alkaline Phosphatase/metabolism
- Animals
- Blood Chemical Analysis
- Body Weight/drug effects
- Calcification, Physiologic
- Cells, Cultured
- Core Binding Factor Alpha 1 Subunit/genetics
- Core Binding Factor Alpha 1 Subunit/metabolism
- Coronary Artery Disease/etiology
- Coronary Vessels/metabolism
- Coronary Vessels/pathology
- Cytokines/blood
- Diet, Atherogenic
- Disease Models, Animal
- Echocardiography
- Endothelial Cells/cytology
- Endothelial Cells/metabolism
- Endothelium, Vascular/enzymology
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Enzyme Inhibitors/pharmacology
- Humans
- Hyperlipoproteinemia Type II/metabolism
- Hyperlipoproteinemia Type II/pathology
- Immunohistochemistry
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Myocardium/enzymology
- Myocardium/metabolism
- Myocardium/pathology
- Placebo Effect
- Receptors, LDL/genetics
- Ventricular Function, Left/drug effects
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Affiliation(s)
- Filippo Romanelli
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
| | - AnthonyMarco Corbo
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
| | - Maryam Salehi
- Children’s Health Research Center, Sanford Research, Sioux Falls, South Dakota, United States of America
| | - Manisha C. Yadav
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, United States of America
| | - Soha Salman
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
| | - David Petrosian
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
| | - Omid J. Rashidbaigi
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
| | - Jesse Chait
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
| | - Jes Kuruvilla
- Children’s Health Research Center, Sanford Research, Sioux Falls, South Dakota, United States of America
| | - Maria Plummer
- Department of Clinical Specialties, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
| | - Ilian Radichev
- Children’s Health Research Center, Sanford Research, Sioux Falls, South Dakota, United States of America
| | - Kenneth B. Margulies
- Heart Failure and Transplant Program, Perelman School of Medicine, University of Pennsylvania Translational Research Center, Philadelphia, Pennsylvania, United States of America
| | - A. Martin Gerdes
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
| | - Anthony B. Pinkerton
- Prebys Center for Drug Discovery, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, United States of America
| | - José Luis Millán
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, United States of America
| | - Alexei Y. Savinov
- Children’s Health Research Center, Sanford Research, Sioux Falls, South Dakota, United States of America
| | - Olga V. Savinova
- Department of Biomedical Sciences, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States of America
- * E-mail:
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Pećin I, Hartgers ML, Hovingh GK, Dent R, Reiner Ž. Prevention of cardiovascular disease in patients with familial hypercholesterolaemia: The role of PCSK9 inhibitors. Eur J Prev Cardiol 2017. [PMID: 28644091 PMCID: PMC5574519 DOI: 10.1177/2047487317717346] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Familial hypercholesterolaemia is an autosomal dominant inherited disorder characterised by elevated low-density lipoprotein cholesterol levels and consequently an increased risk of atherosclerotic cardiovascular disease (ASCVD). Familial hypercholesterolaemia is relatively common, but is often underdiagnosed and undertreated. Cardiologists are likely to encounter many individuals with familial hypercholesterolaemia; however, patients presenting with premature ASCVD are rarely screened for familial hypercholesterolaemia and fasting lipid levels are infrequently documented. Given that individuals with familial hypercholesterolaemia and ASCVD are at a particularly high risk of subsequent cardiac events, this is a missed opportunity for preventive therapy. Furthermore, because there is a 50% chance that first-degree relatives of individuals with familial hypercholesterolaemia will also be affected by the disorder, the underdiagnosis of familial hypercholesterolaemia among patients with ASCVD is a barrier to cascade screening and the prevention of ASCVD in affected relatives. Targeted screening of patients with ASCVD is an effective strategy to identify new familial hypercholesterolaemia index cases. Statins are the standard treatment for individuals with familial hypercholesterolaemia; however, low-density lipoprotein cholesterol targets are not achieved in a large proportion of patients despite treatment. Proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors have been shown to reduce low-density lipoprotein cholesterol levels considerably in individuals with familial hypercholesterolaemia who are concurrently receiving the maximal tolerated statin dose. The clinical benefit of PCSK9 inhibitors must, however, also be considered in terms of their cost-effectiveness. Increased awareness of familial hypercholesterolaemia is required among healthcare professionals, particularly cardiologists and primary care physicians, in order to start early preventive measures and to reduce the mortality and morbidity associated with familial hypercholesterolaemia and ASCVD.
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Affiliation(s)
- Ivan Pećin
- 1 Department of Internal Medicine, University Hospital Centre Zagreb, Croatia.,2 School of Medicine, University of Zagreb, Croatia
| | - Merel L Hartgers
- 3 Department of Vascular Medicine, Academic Medical Centre, the Netherlands
| | - G Kees Hovingh
- 3 Department of Vascular Medicine, Academic Medical Centre, the Netherlands
| | - Ricardo Dent
- 4 Amgen (Europe) GmbH, Zug, Switzerland.,5 Esperion Therapeutics Inc., Ann Arbor, USA
| | - Željko Reiner
- 1 Department of Internal Medicine, University Hospital Centre Zagreb, Croatia.,2 School of Medicine, University of Zagreb, Croatia
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8
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Abstract
PURPOSE OF REVIEW To compare the European and US guidelines for familial hypercholesterolaemia, but also all the European and US position/consensus papers on heterozygous and homozygous familial hypercholesterolaemia published recently. RECENT FINDINGS It has been established that the prevalence of familial hypercholesterolaemia was previously markedly underestimated. The disease is characterized by a lifelong significant increase in LDL cholesterol (LDL-C) levels and therefore premature atherosclerotic cardiovascular disease. Recommendations on familial hypercholesterolaemia have been included as a special chapter in the recent European (European Society of Cardiology/European Atherosclerosis Society) guidelines on dyslipidaemia, whereas in the new US (American College of Cardiology/American Heart Association) lipid guidelines they have been included only generally and these guidelines avoid mentioning familial hypercholesterolaemia explicitly. Both of these guidelines recommend statins in high doses as the treatment option. However, in the American College of Cardiology/American Heart Association guidelines, there is no requirement to attain a specific LDL-C target which is different from the European Society of Cardiology/European Atherosclerosis Society guidelines. Although these two guidelines differ markedly in a number of aspects, they both stress the need to diagnose familial hypercholesterolaemia patients as early as possible and to treat them with intensive LDL-C-lowering therapy. SUMMARY All the guidelines and consensus papers stress that earlier diagnosis and effective treatment can markedly improve life expectancy among familial hypercholesterolaemia patients.
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Affiliation(s)
- Željko Reiner
- Department of Internal Medicine, School of Medicine, University Hospital Centre Zagreb, University of Zagreb, Zagreb, Croatia
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Anasagasti A, Barandika O, Irigoyen C, Benitez BA, Cooper B, Cruchaga C, López de Munain A, Ruiz-Ederra J. Genetic high throughput screening in Retinitis Pigmentosa based on high resolution melting (HRM) analysis. Exp Eye Res 2014; 116:386-394. [PMID: 24416769 DOI: 10.1016/j.exer.2013.10.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Retinitis Pigmentosa (RP) involves a group of genetically determined retinal diseases caused by a large number of mutations that result in rod photoreceptor cell death followed by gradual death of cone cells. Most cases of RP are monogenic, with more than 80 associated genes identified so far. The high number of genes and variants involved in RP, among other factors, is making the molecular characterization of RP a real challenge for many patients. Although HRM has been used for the analysis of isolated variants or single RP genes, as far as we are concerned, this is the first study that uses HRM analysis for a high-throughput screening of several RP genes. Our main goal was to test the suitability of HRM analysis as a genetic screening technique in RP, and to compare its performance with two of the most widely used NGS platforms, Illumina and PGM-Ion Torrent technologies. RP patients (n = 96) were clinically diagnosed at the Ophthalmology Department of Donostia University Hospital, Spain. We analyzed a total of 16 RP genes that meet the following inclusion criteria: 1) size: genes with transcripts of less than 4 kb; 2) number of exons: genes with up to 22 exons; and 3) prevalence: genes reported to account for, at least, 0.4% of total RP cases worldwide. For comparison purposes, RHO gene was also sequenced with Illumina (GAII; Illumina), Ion semiconductor technologies (PGM; Life Technologies) and Sanger sequencing (ABI 3130xl platform; Applied Biosystems). Detected variants were confirmed in all cases by Sanger sequencing and tested for co-segregation in the family of affected probands. We identified a total of 65 genetic variants, 15 of which (23%) were novel, in 49 out of 96 patients. Among them, 14 (4 novel) are probable disease-causing genetic variants in 7 RP genes, affecting 15 patients. Our HRM analysis-based study, proved to be a cost-effective and rapid method that provides an accurate identification of genetic RP variants. This approach is effective for medium sized (<4 kb transcript) RP genes, which constitute over 80% of the total of known RP genes.
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Affiliation(s)
- Ander Anasagasti
- Department of Neuroscience, Instituto Biodonostia, Paseo Dr. Begiristain s/n, E-20014 San Sebastián, Spain
| | - Olatz Barandika
- Department of Neuroscience, Instituto Biodonostia, Paseo Dr. Begiristain s/n, E-20014 San Sebastián, Spain
| | - Cristina Irigoyen
- Department of Ophthalmology, Hospital Universitario Donostia, San Sebastián, Spain
| | - Bruno A Benitez
- Department of Psychiatry, Washington University, St. Louis, MO, USA
| | - Breanna Cooper
- Department of Psychiatry, Washington University, St. Louis, MO, USA
| | - Carlos Cruchaga
- Department of Psychiatry, Washington University, St. Louis, MO, USA; Hope Center Program on Protein Aggregation and Neurodegeneration, Washington University, St. Louis, MO, USA
| | - Adolfo López de Munain
- Department of Neuroscience, Instituto Biodonostia, Paseo Dr. Begiristain s/n, E-20014 San Sebastián, Spain; Department of Neurology, Hospital Universitario Donostia, San Sebastián, Spain; CIBERNED, Centro de Investigaciones Biomédicas en Red sobre Enfermedades Neurodegenerativas, Instituto Carlos III, Ministerio de Economía y Competitividad, Spain; Department of Neurosciences, University of the Basque Country UPV-EHU, Spain; Euskampus, University of the Basque Country UPV-EHU, Spain
| | - Javier Ruiz-Ederra
- Department of Neuroscience, Instituto Biodonostia, Paseo Dr. Begiristain s/n, E-20014 San Sebastián, Spain.
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Reiner Ž. Impact of Early Evidence of Atherosclerotic Changes on Early Treatment in Children With Familial Hypercholesterolemia. Circ Res 2014; 114:233-5. [DOI: 10.1161/circresaha.113.302952] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Željko Reiner
- From the Division for Metabolic Diseases, Department of Internal Medicine, University Hospital Center Zagreb, School of Medicine, Zagreb University, Zagreb, Croatia
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11
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Komarova TY, Korneva VA, Kuznetsova TY, Golovina AS, Vasilyev VB, Mandelshtam MY. Familial hypercholesterolemia mutations in Petrozavodsk: no similarity to St. Petersburg mutation spectrum. BMC MEDICAL GENETICS 2013; 14:128. [PMID: 24373485 PMCID: PMC3877960 DOI: 10.1186/1471-2350-14-128] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 12/19/2013] [Indexed: 01/26/2023]
Abstract
Background Familial hypercholesterolemia (FH) is a human monogenic disease induced by a variety of mutations with striking genetic diversity. Despite this variability recurrent mutations occur in each population studied, which allows both elucidating prevalent mutations and developing DNA diagnostic tools for the disease. Recent research of FH in St. Petersburg, Moscow and Novosibirsk (major cities in Russia) demonstrates that each megapolis has its own FH mutation spectrum sharing only small part of mutations with other populations in Russia and Europe. In order to optimize molecular-genetic diagnostic protocols for FH in Russia we studied mutation spectrum in other regions including Petrozavodsk, a smaller town in relatively close proximity to St. Petersburg. Methods The principal method was automated detection of single-strand conformation polymorphism followed by direct PCR amplified DNA sequencing. Results Twelve different mutations of the low density lipoprotein (LDL) receptor gene were detected in the Petrozavodsk sample (80 patients). Out of these twelve mutations, seven have never been described before (c.192_201delinsGGACTTCA, c. 195_196insT, c. 618 T > G, c. 1340C > G, c. 1686_1693delinsT, c. 1936C > A, c. 2191delG). Other five mutations (c. 58G > A, c. 925_931del, c. 1194C > T, c. 1532 T > C, c. 1920C > T) were previously characterized elsewhere. All new mutations are considered to be a probable cause of the FH in their carriers. Direct evidence of the neutral character of c.58G > A or p. (Gly20Arg) is provided for the first time. Each pathogenic mutation was a trait of its own unique pedigree and so far has not been found in other patients. Conclusions Strikingly, out of twelve mutations characterized in the Petrozavodsk sample only one mutation, c. 925_931del, has previously been found in patients from St. Petersburg and Finland (most closely located studied populations), suggesting some common roots in origin of these populations in the past or limited gene exchange between them nowadays. No recurrent mutations were detected.
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Affiliation(s)
| | | | | | | | | | - Michail Yu Mandelshtam
- Department of Molecular Genetics, Institute for Experimental Medicine, NW Branch of Russian Academy of Medical Sciences, Pavlov Street, 12, St,Petersburg 197376, Russia.
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