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Mănescu IB, Gabor MR, Moldovan GV, Hadadi L, Huțanu A, Bănescu C, Dobreanu M. An 8-SNP LDL Cholesterol Polygenic Score: Associations with Cardiovascular Risk Traits, Familial Hypercholesterolemia Phenotype, and Premature Coronary Heart Disease in Central Romania. Int J Mol Sci 2024; 25:10038. [PMID: 39337524 PMCID: PMC11432653 DOI: 10.3390/ijms251810038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2024] [Revised: 09/07/2024] [Accepted: 09/16/2024] [Indexed: 09/30/2024] Open
Abstract
Familial hypercholesterolemia (FH) is the most significant inherited risk factor for coronary heart disease (CHD). Current guidelines focus on monogenic FH, but the polygenic form is more common and less understood. This study aimed to assess the clinical utility of an 8-SNP LDLC polygenic score in a central Romanian cohort. The cohort included 97 healthy controls and 125 patients with premature (P)CHD. The weighted LDLC polygenic risk score (wPRS) was analyzed for associations with relevant phenotypic traits, PCHD risk, and clinical FH diagnosis. The wPRS positively correlated with LDLC and DLCN scores, and LDLC concentrations could be predicted by wPRS. A trend of increasing LDLC and DLCN scores with wPRS deciles was observed. A +1 SD increase in wPRS was associated with a 36% higher likelihood of having LDLC > 190 mg/dL and increases in LDLC (+0.20 SD), DLCN score (+0.16 SD), and BMI (+0.15 SD), as well as a decrease in HDLC (-0.14 SD). Although wPRS did not predict PCHD across the entire spectrum of values, individuals above the 90th percentile were three times more likely to have PCHD compared to those within the 10th or 20th percentiles. Additionally, wPRS > 45th percentile identified "definite" clinical FH (DLCN score > 8) with 100% sensitivity and 45% specificity. The LDLC polygenic score correlates with key phenotypic traits, and individuals with high scores are more likely to have PCHD. Implementing this genetic tool may enhance risk prediction and patient stratification. These findings, the first of their kind in Romania, are consistent with the existing literature.
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Affiliation(s)
- Ion Bogdan Mănescu
- Department of Laboratory Medicine, Faculty of Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania; (A.H.); (M.D.)
| | - Manuela Rozalia Gabor
- Department of Economic Science, Faculty of Economics and Law, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540566 Targu Mures, Romania;
- Department of Economic Research, Centre for Law, Economics and Business Studies, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540566 Targu Mures, Romania
| | - George Valeriu Moldovan
- Clinical Laboratory, Emergency County Clinical Hospital of Targu Mures, 540136 Targu Mures, Romania
| | - László Hadadi
- Emergency Institute for Cardiovascular Diseases and Transplantation, 540136 Targu Mures, Romania;
| | - Adina Huțanu
- Department of Laboratory Medicine, Faculty of Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania; (A.H.); (M.D.)
- Clinical Laboratory, Emergency County Clinical Hospital of Targu Mures, 540136 Targu Mures, Romania
| | - Claudia Bănescu
- Department of Genetics, Faculty of Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania;
- Genetics Laboratory, Center for Advanced Medical and Pharmaceutical Research, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania
| | - Minodora Dobreanu
- Department of Laboratory Medicine, Faculty of Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania; (A.H.); (M.D.)
- Clinical Laboratory, Emergency County Clinical Hospital of Targu Mures, 540136 Targu Mures, Romania
- Immunology Laboratory, Center for Advanced Medical and Pharmaceutical Research, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540142 Targu Mures, Romania
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Santos RD. Familial hypercholesterolaemia: need for equitable treatment in women and men. Eur Heart J 2024; 45:3251-3253. [PMID: 39082699 DOI: 10.1093/eurheartj/ehae464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/15/2024] Open
Affiliation(s)
- Raul D Santos
- Academic Research Organization, Hospital Israelita Albert Einstein, Av. Albert Einstein, 627/701-Morumbi, Sao Paulo, SP 05652-900, Brazil
- Lipid Clinic Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
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Morgan KM, Campbell-Salome G, Walters NL, Betts MN, Brangan A, Johns A, Kirchner HL, Lindsey-Mills Z, McGowan MP, Tricou EP, Rahm AK, Sturm AC, Jones LK. Innovative Implementation Strategies for Familial Hypercholesterolemia Cascade Testing: The Impact of Genetic Counseling. J Pers Med 2024; 14:841. [PMID: 39202032 PMCID: PMC11355397 DOI: 10.3390/jpm14080841] [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: 07/19/2024] [Revised: 08/02/2024] [Accepted: 08/06/2024] [Indexed: 09/03/2024] Open
Abstract
The IMPACT-FH study implemented strategies (packet, chatbot, direct contact) to promote family member cascade testing for familial hypercholesterolemia (FH). We evaluated the impact of genetic counseling (GC) on medical outcomes, strategy selection, and cascade testing. Probands (i.e., patients with FH) were recommended to complete GC and select sharing strategies. Comparisons were performed for both medical outcomes and strategy selection between probands with or without GC. GEE models for Poisson regression were used to examine the relationship between proband GC completion and first-degree relative (FDR) cascade testing. Overall, 46.3% (81/175) of probands completed GC. Probands with GC had a median LDL-C reduction of -13.0 mg/dL (-61.0, 4.0) versus -1.0 mg/dL (-16.0, 17.0) in probands without GC (p = 0.0054). Probands with and without GC selected sharing strategies for 65.3% and 40.3% of FDRs, respectively (p < 0.0001). Similarly, 27.1% of FDRs of probands with GC completed cascade testing, while 12.0% of FDRs of probands without GC completed testing (p = 0.0043). Direct contact was selected for 47 relatives in total and completed for 39, leading to the detection of 18 relatives with FH. Proband GC was associated with improved medical outcomes and increased FDR cascade testing. Direct contact effectively identified FH cases for the subset who participated.
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Affiliation(s)
- Kelly M. Morgan
- Department of Genomic Health, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA; (G.C.-S.); (N.L.W.); (A.B.); (Z.L.-M.); (A.C.S.)
| | - Gemme Campbell-Salome
- Department of Genomic Health, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA; (G.C.-S.); (N.L.W.); (A.B.); (Z.L.-M.); (A.C.S.)
- Department of Population Health Sciences, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA;
| | - Nicole L. Walters
- Department of Genomic Health, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA; (G.C.-S.); (N.L.W.); (A.B.); (Z.L.-M.); (A.C.S.)
| | - Megan N. Betts
- WellSpan Health, 605 S. George Street, York, PA 17401, USA;
| | - Andrew Brangan
- Department of Genomic Health, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA; (G.C.-S.); (N.L.W.); (A.B.); (Z.L.-M.); (A.C.S.)
| | - Alicia Johns
- Biostatistics Core, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA;
| | - H. Lester Kirchner
- Department of Population Health Sciences, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA;
| | - Zoe Lindsey-Mills
- Department of Genomic Health, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA; (G.C.-S.); (N.L.W.); (A.B.); (Z.L.-M.); (A.C.S.)
| | - Mary P. McGowan
- Family Heart Foundation, 605 E. Colorado Blvd Ste 180, Pasadena, CA 91101, USA (E.P.T.)
| | - Eric P. Tricou
- Family Heart Foundation, 605 E. Colorado Blvd Ste 180, Pasadena, CA 91101, USA (E.P.T.)
| | - Alanna Kulchak Rahm
- Department of Genomic Health, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA; (G.C.-S.); (N.L.W.); (A.B.); (Z.L.-M.); (A.C.S.)
| | - Amy C. Sturm
- Department of Genomic Health, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA; (G.C.-S.); (N.L.W.); (A.B.); (Z.L.-M.); (A.C.S.)
- Heart and Vascular Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA
- 23andMe, 223 N. Mathilda Avenue, Sunnyvale, CA 94086, USA
| | - Laney K. Jones
- Department of Genomic Health, Research Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA; (G.C.-S.); (N.L.W.); (A.B.); (Z.L.-M.); (A.C.S.)
- Heart and Vascular Institute, Geisinger, 100 N. Academy Avenue, Danville, PA 17922, USA
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Nasir K, Mszar R, Cainzos-Achirica M, Grandhi GR, Tromp TR, Alonso R, Bittencourt MS, Bruckert E, Díaz-Díaz JL, Gallo A, Hovingh GK, Miname MH, Muñiz-Grijalvo O, Pang J, de Isla LP, Sijbrands EJ, Watts GF, Mata P, Santos RD. Age- and sex-based heterogeneity in coronary artery plaque presence and burden in familial hypercholesterolemia: A multi-national study. Am J Prev Cardiol 2024; 17:100611. [PMID: 38125206 PMCID: PMC10730992 DOI: 10.1016/j.ajpc.2023.100611] [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] [Received: 01/24/2023] [Revised: 09/05/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
Objectives Individuals with familial hypercholesterolemia (FH) are at an increased risk for coronary artery disease (CAD). While prior research has shown variability in coronary artery calcification (CAC) among those with FH, studies with small sample sizes and single-center recruitment have been limited in their ability to characterize CAC and plaque burden in subgroups based on age and sex. Understanding the spectrum of atherosclerosis may result in personalized risk assessment and tailored allocation of costly add-on, non-statin lipid-lowering therapies. We aimed to characterize the presence and burden of CAC and coronary plaque on computed tomography angiography (CTA) across age- and sex-stratified subgroups of individuals with FH who were without CAD at baseline. Methods We pooled 1,011 patients from six cohorts across Brazil, France, the Netherlands, Spain, and Australia. Our main measures of subclinical atherosclerosis included CAC ranges (i.e., 0, 1-100, 101-400, >400) and CTA-derived plaque burden (i.e., no plaque, non-obstructive CAD, obstructive CAD). Results Ninety-five percent of individuals with FH (mean age: 48 years; 54% female; treated LDL-C: 154 mg/dL) had a molecular diagnosis and 899 (89%) were on statin therapy. Overall, 423 (42%) had CAC=0, 329 (33%) had CAC 1-100, 160 (16%) had CAC 101-400, and 99 (10%) had CAC >400. Compared to males, female patients were more likely to have CAC=0 (48% [n = 262] vs 35% [n = 161]) and no plaque on CTA (39% [n = 215] vs 26% [n = 120]). Among patients with CAC=0, 85 (20%) had non-obstructive CAD. Females also had a lower prevalence of obstructive CAD in CAC 1-100 (8% [n = 15] vs 18% [n = 26]), CAC 101-400 (32% [n = 22] vs 40% [n = 36]), and CAC >400 (52% [n = 16] vs 65% [n = 44]). Female patients aged 50-59 years were less likely to have obstructive CAD in CAC >400 (55% [n = 6] vs 70% [n = 19]). Conclusion In this large, multi-national study, we found substantial age- and sex-based heterogeneity in CAC and plaque burden in a cohort of predominantly statin-treated individuals with FH, with evidence for a less pronounced increase in atherosclerosis among female patients. Future studies should examine the predictors of resilience to and long-term implications of the differential burden of subclinical coronary atherosclerosis in this higher risk population.
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Affiliation(s)
- Khurram Nasir
- Houston Methodist DeBakey Heart & Vascular Center, Houston, TX, USA
| | - Reed Mszar
- Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, CT, USA
| | | | - Gowtham R. Grandhi
- Virginia Commonwealth University Health Pauley Heart Center, Richmond, VA, USA
| | - Tycho R. Tromp
- Department of Vascular Medicine, Amsterdam UMC, location AMC, Amsterdam, the Netherlands
| | - Rodrigo Alonso
- Center for Advanced Metabolic Medicine and Nutrition, Santiago, Chile
- Fundación Hipercolesterolemia Familiar, Madrid, Spain
| | - Márcio S. Bittencourt
- Division of Internal Medicine, University Hospital, University of São Paulo, São Paulo, Brazil
| | - Eric Bruckert
- Sorbonne Université, INSERM UMR1166, Lipidology and Cardiovascular Prevention Unit, Department of Nutrition, APHP, Hôpital Pitié-Salpètriêre, Paris, France
| | - José Luis Díaz-Díaz
- Complejo Hospitalario Universitario, Hospital Abente y Lago, A Corūna, Spain
| | - Antonio Gallo
- Sorbonne Université, INSERM UMR1166, Lipidology and Cardiovascular Prevention Unit, Department of Nutrition, APHP, Hôpital Pitié-Salpètriêre, Paris, France
| | - G. Kees Hovingh
- Department of Vascular Medicine, Amsterdam UMC, location AMC, Amsterdam, the Netherlands
| | - Marcio H. Miname
- Heart Institute (INCOR), University of São Paulo Medical School Hospital, São Paulo, Brazil
| | | | - Jing Pang
- School of Medicine, University of Western Australia, Department of Cardiology, Royal Perth Hospital, Western Australia, Australia
| | - Leopoldo Perez de Isla
- Cardiology Department, Hospital Clinico San Carlos, IDISSC, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Eric J.G. Sijbrands
- Department of Internal Medicine, Section Pharmacology, Vascular and Metabolic Diseases, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Gerald F. Watts
- School of Medicine, University of Western Australia, Department of Cardiology, Royal Perth Hospital, Western Australia, Australia
| | - Pedro Mata
- Fundación Hipercolesterolemia Familiar, Madrid, Spain
| | - Raul D. Santos
- Heart Institute (INCOR), University of São Paulo Medical School Hospital, São Paulo, Brazil
- Hospital Israelita Albert Einstein, São Paulo, Brazil
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5
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Medeiros AM, Alves AC, Miranda B, Chora JR, Bourbon M. Unraveling the genetic background of individuals with a clinical familial hypercholesterolemia phenotype. J Lipid Res 2024; 65:100490. [PMID: 38122934 PMCID: PMC10832474 DOI: 10.1016/j.jlr.2023.100490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/04/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023] Open
Abstract
Familial hypercholesterolemia (FH) is a common genetic disorder of lipid metabolism caused by pathogenic/likely pathogenic variants in LDLR, APOB, and PCSK9 genes. Variants in FH-phenocopy genes (LDLRAP1, APOE, LIPA, ABCG5, and ABCG8), polygenic hypercholesterolemia, and hyperlipoprotein (a) [Lp(a)] can also mimic a clinical FH phenotype. We aim to present a new diagnostic tool to unravel the genetic background of clinical FH phenotype. Biochemical and genetic study was performed in 1,005 individuals with clinical diagnosis of FH, referred to the Portuguese FH Study. A next-generation sequencing panel, covering eight genes and eight SNPs to determine LDL-C polygenic risk score and LPA genetic score, was validated, and used in this study. FH was genetically confirmed in 417 index cases: 408 heterozygotes and 9 homozygotes. Cascade screening increased the identification to 1,000 FH individuals, including 11 homozygotes. FH-negative individuals (phenotype positive and genotype negative) have Lp(a) >50 mg/dl (30%), high polygenic risk score (16%), other monogenic lipid metabolism disorders (1%), and heterozygous pathogenic variants in FH-phenocopy genes (2%). Heterozygous variants of uncertain significance were identified in primary genes (12%) and phenocopy genes (7%). Overall, 42% of our cohort was genetically confirmed with FH. In the remaining individuals, other causes for high LDL-C were identified in 68%. Hyper-Lp(a) or polygenic hypercholesterolemia may be the cause of the clinical FH phenotype in almost half of FH-negative individuals. A small part has pathogenic variants in ABCG5/ABCG8 in heterozygosity that can cause hypercholesterolemia and should be further investigated. This extended next-generation sequencing panel identifies individuals with FH and FH-phenocopies, allowing to personalize each person's treatment according to the affected pathway.
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Affiliation(s)
- Ana Margarida Medeiros
- Unidade de I&D, Grupo de Investigação Cardiovascular, Departamento de Promoção da Saúde e Prevenção de Doenças Não Transmissíveis, Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisboa, Portugal; BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Ana Catarina Alves
- Unidade de I&D, Grupo de Investigação Cardiovascular, Departamento de Promoção da Saúde e Prevenção de Doenças Não Transmissíveis, Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisboa, Portugal; BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Beatriz Miranda
- Unidade de I&D, Grupo de Investigação Cardiovascular, Departamento de Promoção da Saúde e Prevenção de Doenças Não Transmissíveis, Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisboa, Portugal; BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Joana Rita Chora
- Unidade de I&D, Grupo de Investigação Cardiovascular, Departamento de Promoção da Saúde e Prevenção de Doenças Não Transmissíveis, Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisboa, Portugal; BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Mafalda Bourbon
- Unidade de I&D, Grupo de Investigação Cardiovascular, Departamento de Promoção da Saúde e Prevenção de Doenças Não Transmissíveis, Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisboa, Portugal; BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal.
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de Sá ACMGN, Gomes CS, Prates EJS, Brant LCC, Malta DC. Prevalence and factors associated with possible cases of familial hypercholesterolemia in Brazilian adults: a cross-sectional study. Sci Rep 2023; 13:20459. [PMID: 37993629 PMCID: PMC10665423 DOI: 10.1038/s41598-023-47692-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 11/16/2023] [Indexed: 11/24/2023] Open
Abstract
This study aimed to estimate the prevalence of possible cases of FH and analyze associated factors in the adult Brazilian population. Cross-sectional study with laboratory data from the Brazilian National Health Survey, with 8521 participants. Possible cases of FH were defined according to the Dutch Lipid Clinic Network criteria. The prevalence and 95% confidence intervals (95% CI) of possible cases of FH were estimated according to sociodemographic variables, lifestyle, diabetes, hypertension, altered tests, treatment and self-rated health. Logistic regression was used to analyze the associations. The prevalence of possible cases of FH was 0.96%, higher in women, between 45 and 59 years, white race/skin color and others, less education, people with diabetes, hypertension and total cholesterol ≥ 310 mg/dL. The presence of FH was positively associated with regular self-rated health (OR 1.96; 95% CI 0.99-3.84), poor/very poor (OR 3.02; 95% CI 1.30-7.03) and negatively with black race/skin color (OR 0.10; 95% CI 0.02-0.46) and complete elementary school, incomplete high school (OR 0.47; 95% CI 0.23-0.98) and complete high school and more (OR 0.45; 95% CI 0.21-0.95). FH affects 1:104 Brazilian adults, these findings contribute to understanding the burden of disease in Brazil. Due to the scarcity of studies on FH in low- and middle-income countries, further studies are desirable.
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Affiliation(s)
| | - Crizian Saar Gomes
- Postgraduate Program in Public Health, Faculty of Medicine of the Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Elton Junio Sady Prates
- Postgraduate Nursing Program, Nursing School, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | | | - Deborah Carvalho Malta
- Department of Maternal and Child Nursing and Public Health, School of Nursing, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
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Qureshi N, Woods B, Neves de Faria R, Saramago Goncalves P, Cox E, Leonardi Bee J, Condon L, Weng S, Akyea RK, Iyen B, Roderick P, Humphries SE, Rowlands W, Watson M, Haralambos K, Kenny R, Datta D, Miedzybrodzka Z, Byrne C, Kai J. Alternative cascade-testing protocols for identifying and managing patients with familial hypercholesterolaemia: systematic reviews, qualitative study and cost-effectiveness analysis. Health Technol Assess 2023; 27:1-140. [PMID: 37924278 PMCID: PMC10658348 DOI: 10.3310/ctmd0148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2023] Open
Abstract
Background Cascade testing the relatives of people with familial hypercholesterolaemia is an efficient approach to identifying familial hypercholesterolaemia. The cascade-testing protocol starts with identifying an index patient with familial hypercholesterolaemia, followed by one of three approaches to contact other relatives: indirect approach, whereby index patients contact their relatives; direct approach, whereby the specialist contacts the relatives; or a combination of both direct and indirect approaches. However, it is unclear which protocol may be most effective. Objectives The objectives were to determine the yield of cases from different cascade-testing protocols, treatment patterns, and short- and long-term outcomes for people with familial hypercholesterolaemia; to evaluate the cost-effectiveness of alternative protocols for familial hypercholesterolaemia cascade testing; and to qualitatively assess the acceptability of different cascade-testing protocols to individuals and families with familial hypercholesterolaemia, and to health-care providers. Design and methods This study comprised systematic reviews and analysis of three data sets: PASS (PASS Software, Rijswijk, the Netherlands) hospital familial hypercholesterolaemia databases, the Clinical Practice Research Datalink (CPRD)-Hospital Episode Statistics (HES) linked primary-secondary care data set, and a specialist familial hypercholesterolaemia register. Cost-effectiveness modelling, incorporating preceding analyses, was undertaken. Acceptability was examined in interviews with patients, relatives and health-care professionals. Result Systematic review of protocols: based on data from 4 of the 24 studies, the combined approach led to a slightly higher yield of relatives tested [40%, 95% confidence interval (CI) 37% to 42%] than the direct (33%, 95% CI 28% to 39%) or indirect approaches alone (34%, 95% CI 30% to 37%). The PASS databases identified that those contacted directly were more likely to complete cascade testing (p < 0.01); the CPRD-HES data set indicated that 70% did not achieve target treatment levels, and demonstrated increased cardiovascular disease risk among these individuals, compared with controls (hazard ratio 9.14, 95% CI 8.55 to 9.76). The specialist familial hypercholesterolaemia register confirmed excessive cardiovascular morbidity (standardised morbidity ratio 7.17, 95% CI 6.79 to 7.56). Cost-effectiveness modelling found a net health gain from diagnosis of -0.27 to 2.51 quality-adjusted life-years at the willingness-to-pay threshold of £15,000 per quality-adjusted life-year gained. The cost-effective protocols cascaded from genetically confirmed index cases by contacting first- and second-degree relatives simultaneously and directly. Interviews found a service-led direct-contact approach was more reliable, but combining direct and indirect approaches, guided by index patients and family relationships, may be more acceptable. Limitations Systematic reviews were not used in the economic analysis, as relevant studies were lacking or of poor quality. As only a proportion of those with primary care-coded familial hypercholesterolaemia are likely to actually have familial hypercholesterolaemia, CPRD analyses are likely to underestimate the true effect. The cost-effectiveness analysis required assumptions related to the long-term cardiovascular disease risk, the effect of treatment on cholesterol and the generalisability of estimates from the data sets. Interview recruitment was limited to white English-speaking participants. Conclusions Based on limited evidence, most cost-effective cascade-testing protocols, diagnosing most relatives, select index cases by genetic testing, with services directly contacting relatives, and contacting second-degree relatives even if first-degree relatives have not been tested. Combined approaches to contact relatives may be more suitable for some families. Future work Establish a long-term familial hypercholesterolaemia cohort, measuring cholesterol levels, treatment and cardiovascular outcomes. Conduct a randomised study comparing different approaches to contact relatives. Study registration This study is registered as PROSPERO CRD42018117445 and CRD42019125775. Funding This project was funded by the National Institute for Health and Care Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 27, No. 16. See the NIHR Journals Library website for further project information.
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Affiliation(s)
- Nadeem Qureshi
- PRISM Research Group, Centre for Academic Primary Care, School of Medicine, University of Nottingham, Nottingham, UK
| | - Bethan Woods
- Centre for Health Economics, University of York, York, UK
| | | | | | - Edward Cox
- Centre for Health Economics, University of York, York, UK
| | - Jo Leonardi Bee
- PRISM Research Group, Centre for Academic Primary Care, School of Medicine, University of Nottingham, Nottingham, UK
| | - Laura Condon
- PRISM Research Group, Centre for Academic Primary Care, School of Medicine, University of Nottingham, Nottingham, UK
| | - Stephen Weng
- Cardiovascular and Metabolism, Janssen Research and Development, High Wycombe, UK
| | - Ralph K Akyea
- PRISM Research Group, Centre for Academic Primary Care, School of Medicine, University of Nottingham, Nottingham, UK
| | - Barbara Iyen
- PRISM Research Group, Centre for Academic Primary Care, School of Medicine, University of Nottingham, Nottingham, UK
| | - Paul Roderick
- Primary Care, Population Sciences and Medical Education, University of Southampton, Southampton, UK
| | - Steve E Humphries
- Centre for Cardiovascular Genetics, Institute for Cardiovascular Science, University College London, London, UK
| | | | - Melanie Watson
- Wessex Clinical Genetics Service, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Kate Haralambos
- Familial Hypercholesterolaemia Service, University Hospital of Wales, Cardiff, UK
| | - Ryan Kenny
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Dev Datta
- Lipid Unit, University Hospital Llandough, Penarth, UK
| | | | - Christopher Byrne
- Southampton National Institute for Health and Care Research Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Joe Kai
- PRISM Research Group, Centre for Academic Primary Care, School of Medicine, University of Nottingham, Nottingham, UK
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Constantin AT, Streata I, Covăcescu MS, Riza AL, Roșca I, Delia C, Tudor LM, Dorobanțu Ș, Dragoș A, Ristea D, Ioana M, Gherghina I. Genetic Testing for Familial Hypercholesterolemia in a Pediatric Group: A Romanian Showcase. Diagnostics (Basel) 2023; 13:1988. [PMID: 37370883 DOI: 10.3390/diagnostics13121988] [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: 05/16/2023] [Revised: 05/29/2023] [Accepted: 06/04/2023] [Indexed: 06/29/2023] Open
Abstract
Familial hypercholesterolemia (FH) is a genetic disease marked by high levels of LDL-cholesterol. This condition has long-term clinical implications, such as cardiovascular events, that are evident during adult life. Here, we report on a single-center cross-sectional showcase study of genetic testing for FH in a Romanian pediatric group. Genetic testing for FH was performed on 20 Romanian pediatric patients, 10 boys and 10 girls, admitted with LDL-cholesterol levels over 130 mg/mL to the National Institute for Mother and Child Health "Alesssandrescu-Rusescu" in 2020. Genetic testing was performed using the Illumina TruSight Cardio panel. We identified pathogenic/likely pathogenic variants that could explain the phenotype in 5/20 cases. The involved genes were LDLR and APOB. Clinical signs that suggest the diagnosis of FH are scarce for the pediatric patient, although it can be diagnosed early during childhood by lipid panel screening. Prevention could prove lifesaving for some of these patients.
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Affiliation(s)
- Andreea Teodora Constantin
- Pediatrics Department, National Institute for Mother and Child Health "Alessandrescu-Rusescu", 020395 Bucharest, Romania
- Pediatrics Department, Faculty of Medicine, University of Medicine and Pharmacy "Carol Davila", 020021 Bucharest, Romania
| | - Ioana Streata
- Genetics Department, University of Medicine and Pharmacy, 200349 Craiova, Romania
- Regional Center for Medical Genetics Dolj, 200642 Craiova, Romania
| | - Mirela Silvia Covăcescu
- Pediatrics Department, National Institute for Mother and Child Health "Alessandrescu-Rusescu", 020395 Bucharest, Romania
- Pediatrics Department, Faculty of Medicine, University of Medicine and Pharmacy "Carol Davila", 020021 Bucharest, Romania
| | - Anca Lelia Riza
- Genetics Department, University of Medicine and Pharmacy, 200349 Craiova, Romania
- Regional Center for Medical Genetics Dolj, 200642 Craiova, Romania
| | - Ioana Roșca
- Faculty of Midwifery and Nursery, University of Medicine and Pharmacy "Carol Davila", 020021 Bucharest, Romania
- Neonatology Department, Clinical Hospital of Obstetrics and Gynecology "Prof. Dr. P.Sârbu", 060251 Bucharest, Romania
| | - Corina Delia
- Pediatrics Department, National Institute for Mother and Child Health "Alessandrescu-Rusescu", 020395 Bucharest, Romania
- Faculty of Biology, University of Bucharest, 030018 Bucharest, Romania
| | - Lucia Maria Tudor
- Pediatrics Department, National Institute for Mother and Child Health "Alessandrescu-Rusescu", 020395 Bucharest, Romania
- Pediatrics Department, Faculty of Medicine, University of Medicine and Pharmacy "Carol Davila", 020021 Bucharest, Romania
| | - Ștefania Dorobanțu
- Genetics Department, University of Medicine and Pharmacy, 200349 Craiova, Romania
- Regional Center for Medical Genetics Dolj, 200642 Craiova, Romania
| | - Adina Dragoș
- Genetics Department, University of Medicine and Pharmacy, 200349 Craiova, Romania
- Regional Center for Medical Genetics Dolj, 200642 Craiova, Romania
| | - Diana Ristea
- Regional Center for Medical Genetics Dolj, 200642 Craiova, Romania
| | - Mihai Ioana
- Genetics Department, University of Medicine and Pharmacy, 200349 Craiova, Romania
- Regional Center for Medical Genetics Dolj, 200642 Craiova, Romania
| | - Ioan Gherghina
- Pediatrics Department, Faculty of Medicine, University of Medicine and Pharmacy "Carol Davila", 020021 Bucharest, Romania
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9
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Zorzo RA, Suen VMM, Santos JE, Silva-Jr WA, Suazo VK, Honorato ALSC, Santos RD, Jannes CE, Pereira A, Krieger JE, Liberatore-Jr RDR. LDLR gene's promoter region hypermethylation in patients with familial hypercholesterolemia. Sci Rep 2023; 13:9241. [PMID: 37286669 DOI: 10.1038/s41598-023-34639-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 05/04/2023] [Indexed: 06/09/2023] Open
Abstract
Familial hypercholesterolemia (FH) is characterized by high low-density lipoprotein cholesterol (LDL-C) levels and a high risk of early coronary heart disease. Structural alterations in the LDLR, APOB, and PCSK9 genes were not found in 20-40% of patients diagnosed using the Dutch Lipid Clinic Network (DCLN) criteria. We hypothesized that methylation in canonical genes could explain the origin of the phenotype in these patients. This study included 62 DNA samples from patients with a clinical diagnosis of FH according to the DCLN criteria, who previously tested negative for structural alterations in the canonical genes, and 47 DNA samples from patients with normal blood lipids (control group). All DNA samples were tested for methylation in the CpG islands of the three genes. The prevalence of FH relative to each gene was determined in both groups and the respective prevalence ratios (PRs) were calculated. The methylation analysis of APOB and PCSK9 was negative in both groups, showing no relationship between methylation in these genes and the FH phenotype. As the LDLR gene has two CpG islands, we analyzed each island separately. The analysis of LDLR-island1 showed PR = 0.982 (CI 0.33-2.95; χ2 = 0.001; p = 0.973), also suggesting no relationship between methylation and the FH phenotype. Analysis of LDLR-island2 showed a PR of 4.12 (CI 1.43-11.88; χ2 = 13,921; p = 0.00019), indicating a possible association between methylation on this island and the FH phenotype.
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Affiliation(s)
- R A Zorzo
- Teaching Institute "Saúde Com Evidência", Ribeirão Preto, Brazil.
- Ribeirão Preto Medical School, University of São Paulo University, São Paulo, Brazil.
| | - V M M Suen
- Ribeirão Preto Medical School, University of São Paulo University, São Paulo, Brazil
| | - J E Santos
- Ribeirão Preto Medical School, University of São Paulo University, São Paulo, Brazil
| | - W A Silva-Jr
- Ribeirão Preto Medical School, University of São Paulo University, São Paulo, Brazil
| | - V K Suazo
- Pediatrics Department, Pediatric Endocrinology, Ribeirão Preto Medical School, São Paulo University, São Paulo, Brazil
| | - A L S C Honorato
- Ribeirão Preto Medical School, University of São Paulo University, São Paulo, Brazil
| | - R D Santos
- Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil
| | - C E Jannes
- Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil
| | - A Pereira
- Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil
| | - J E Krieger
- Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil
| | - R D R Liberatore-Jr
- Ribeirão Preto Medical School, University of São Paulo University, São Paulo, Brazil
- Pediatrics Department, Pediatric Endocrinology, Ribeirão Preto Medical School, São Paulo University, São Paulo, Brazil
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10
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Bassani Borges J, Fernandes Oliveira V, Dagli-Hernandez C, Monteiro Ferreira G, Kristini Almendros Afonso Barbosa T, da Silva Rodrigues Marçal E, Los B, Barbosa Malaquias V, Hernandes Bortolin R, Caroline Costa Freitas R, Akira Mori A, Medeiros Bastos G, Marques Gonçalves R, Branco Araújo D, Zatz H, Bertolami A, Arpad Faludi A, Chiara Bertolami M, Guerra de Moraes Rego Souza A, Ítalo Dias França J, Strelow Thurow H, Dominguez Crespo Hirata T, Takashi Imoto Nakaya H, Elim Jannes C, da Costa Pereira A, Nogueira Silbiger V, Ducati Luchessi A, Nayara Góes Araújo J, Arruda Nakazone M, Silva Carmo T, Rossi Silva Souza D, Moriel P, Yu Ting Wang J, Satya Naslavsky M, Gorjão R, Cristina Pithon-Curi T, Curi R, Moreno Fajardo C, Lin Wang HT, Regina Garófalo A, Cerda A, Ferraz Sampaio M, Dominguez Crespo Hirata R, Hiroyuki Hirata M. Identification of pathogenic variants in the Brazilian cohort with Familial Hypercholesterolemia using exon-targeted gene sequencing. Gene 2023; 875:147501. [PMID: 37217153 DOI: 10.1016/j.gene.2023.147501] [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: 11/18/2022] [Revised: 05/16/2023] [Accepted: 05/18/2023] [Indexed: 05/24/2023]
Abstract
Familial hypercholesterolemia (FH) is a monogenic disease characterized by high plasma low-density lipoprotein cholesterol (LDL-c) levels and increased risk of premature atherosclerotic cardiovascular disease. Mutations in FH-related genes account for 40% of FH cases worldwide. In this study, we aimed to assess the pathogenic variants in FH-related genes in the Brazilian FH cohort FHBGEP using exon-targeted gene sequencing (ETGS) strategy. FH patients (n=210) were enrolled at five clinical sites and peripheral blood samples were obtained for laboratory testing and genomic DNA extraction. ETGS was performed using MiSeq platform (Illumina). To identify deleterious variants in LDLR, APOB, PCSK9, and LDLRAP1, the long-reads were subjected to Burrows-Wheeler Aligner (BWA) for alignment and mapping, followed by variant calling using Genome Analysis Toolkit (GATK) and ANNOVAR for variant annotation. The variants were further filtered using in-house custom scripts and classified according to the American College Medical Genetics and Genomics (ACMG) guidelines. A total of 174 variants were identified including 85 missense, 3 stop-gain, 9 splice-site, 6 InDel, and 71 in regulatory regions (3'UTR and 5'UTR). Fifty-two patients (24.7%) had 30 known pathogenic or likely pathogenic variants in FH-related genes according to the American College Medical and Genetics and Genomics guidelines. Fifty-three known variants were classified as benign, or likely benign and 87 known variants have shown uncertain significance. Four novel variants were discovered and classified as such due to their absence in existing databases. In conclusion, ETGS and in silico prediction studies are useful tools for screening deleterious variants and identification of novel variants in FH-related genes, they also contribute to the molecular diagnosis in the FHBGEP cohort.
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Affiliation(s)
- Jéssica Bassani Borges
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil; Laboratory of Molecular Research in Cardiology, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil; Department of Teaching and Research, Real and Benemerita Associação Portuguesa de Beneficiencia, Sao Paulo 01323-001, Brazil
| | - Victor Fernandes Oliveira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Carolina Dagli-Hernandez
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Glaucio Monteiro Ferreira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil; Laboratory of Molecular Research in Cardiology, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | | | - Elisangela da Silva Rodrigues Marçal
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil; Laboratory of Molecular Research in Cardiology, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | - Bruna Los
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Vanessa Barbosa Malaquias
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Raul Hernandes Bortolin
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil; Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, United States
| | - Renata Caroline Costa Freitas
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil; Department of Cardiac Surgery, Boston Children's Hospital, Boston, MA 02115, United States
| | - Augusto Akira Mori
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Gisele Medeiros Bastos
- Laboratory of Molecular Research in Cardiology, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil; Department of Teaching and Research, Real and Benemerita Associação Portuguesa de Beneficiencia, Sao Paulo 01323-001, Brazil
| | | | - Daniel Branco Araújo
- Medical Clinic Division, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | - Henry Zatz
- Medical Clinic Division, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | - Adriana Bertolami
- Medical Clinic Division, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | - André Arpad Faludi
- Medical Clinic Division, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | | | | | - João Ítalo Dias França
- Laboratory of Epidemiology and Statistics, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | - Helena Strelow Thurow
- Department of Teaching and Research, Real and Benemerita Associação Portuguesa de Beneficiencia, Sao Paulo 01323-001, Brazil
| | - Thiago Dominguez Crespo Hirata
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Helder Takashi Imoto Nakaya
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Cinthia Elim Jannes
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of Sao Paulo, Sao Paulo 05403-900, Brazil
| | - Alexandre da Costa Pereira
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of Sao Paulo, Sao Paulo 05403-900, Brazil
| | - Vivian Nogueira Silbiger
- Department of Clinical and Toxicological Analysis, Federal University of Rio Grande do Norte, Natal 59078-900 Brazil; Northeast Biotechnology Network (RENORBIO), Graduate Program in Biotechnology, Federal University of Rio Grande do Norte, Natal 59078-900, Brazil
| | - André Ducati Luchessi
- Department of Clinical and Toxicological Analysis, Federal University of Rio Grande do Norte, Natal 59078-900 Brazil; Northeast Biotechnology Network (RENORBIO), Graduate Program in Biotechnology, Federal University of Rio Grande do Norte, Natal 59078-900, Brazil
| | - Jéssica Nayara Góes Araújo
- Northeast Biotechnology Network (RENORBIO), Graduate Program in Biotechnology, Federal University of Rio Grande do Norte, Natal 59078-900, Brazil
| | - Marcelo Arruda Nakazone
- Department of Cardiology and Cardiovascular Surgery, Faculdade de Medicina de São José do Rio Preto, Sao Jose do Rio Preto 15090-000, Brazil
| | - Tayanne Silva Carmo
- Department of Cardiology and Cardiovascular Surgery, Faculdade de Medicina de São José do Rio Preto, Sao Jose do Rio Preto 15090-000, Brazil
| | - Dorotéia Rossi Silva Souza
- Department of Biochemistry and Molecular Biology, Sao Jose do Rio Preto Medical School, Sao Jose do Rio Preto 15090-000, Brazil
| | - Patricia Moriel
- Department of Clinical Pathology, Faculty of Pharmaceutical Sciences, State University of Campinas-UNICAMP, Campinas 13083-871, Brazil
| | - Jaqueline Yu Ting Wang
- Human Genome and Stem-Cell Research Center, Biosciences Institute, University of Sao Paulo, Sao Paulo 05508-090, Brazil
| | - Michel Satya Naslavsky
- Human Genome and Stem-Cell Research Center, Biosciences Institute, University of Sao Paulo, Sao Paulo 05508-090, Brazil
| | - Renata Gorjão
- Interdisciplinary Post-graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo 01311-925, Brazil
| | - Tania Cristina Pithon-Curi
- Interdisciplinary Post-graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo 01311-925, Brazil
| | - Rui Curi
- Interdisciplinary Post-graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo 01311-925, Brazil
| | - Cristina Moreno Fajardo
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Hui-Tzu Lin Wang
- Laboratory of Molecular Research in Cardiology, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | - Adriana Regina Garófalo
- Laboratory of Molecular Research in Cardiology, Institute of Cardiology Dante Pazzanese, Sao Paulo 04012-909, Brazil
| | - Alvaro Cerda
- Department of Basic Sciences, Center of Excellence in Translational Medicine, BIOREN, Universidad de La Frontera, Temuco 4810296, Chile
| | - Marcelo Ferraz Sampaio
- Department of Cardiology, Real and Benemerita Associação Portuguesa de Beneficiencia, Sao Paulo 01323-001, Brazil
| | - Rosario Dominguez Crespo Hirata
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil
| | - Mario Hiroyuki Hirata
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000 SP, Brazil.
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11
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Calling and Phasing of Single-Nucleotide and Structural Variants of the LDLR Gene Using Oxford Nanopore MinION. Int J Mol Sci 2023; 24:ijms24054471. [PMID: 36901902 PMCID: PMC10003201 DOI: 10.3390/ijms24054471] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/27/2023] [Accepted: 02/22/2023] [Indexed: 03/12/2023] Open
Abstract
The LDLR locus has clinical significance for lipid metabolism, Mendelian familial hypercholesterolemia (FH), and common lipid metabolism-related diseases (coronary artery disease and Alzheimer's disease), but its intronic and structural variants are underinvestigated. The aim of this study was to design and validate a method for nearly complete sequencing of the LDLR gene using long-read Oxford Nanopore sequencing technology (ONT). Five PCR amplicons from LDLR of three patients with compound heterozygous FH were analyzed. We used standard workflows of EPI2ME Labs for variant calling. All rare missense and small deletion variants detected previously by massively parallel sequencing and Sanger sequencing were identified using ONT. One patient had a 6976 bp deletion (exons 15 and 16) that was detected by ONT with precisely located breakpoints between AluY and AluSx1. Trans-heterozygous associations between mutation c.530C>T and c.1054T>C, c.2141-966_2390-330del, and c.1327T>C, and between mutations c.1246C>T and c.940+3_940+6del of LDLR, were confirmed. We demonstrated the ability of ONT to phase variants, thereby enabling haplotype assignment for LDLR with personalized resolution. The ONT-based method was able to detect exonic variants with the additional benefit of intronic analysis in one run. This method can serve as an efficient and cost-effective tool for diagnosing FH and conducting research on extended LDLR haplotype reconstruction.
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12
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Barbosa TKA, Hirata RDC, Ferreira GM, Borges JB, Oliveira VFD, Gorjão R, Marçal ERDS, Gonçalves RM, Faludi AA, Freitas RCCD, Dagli-Hernandez C, Bortolin RH, Bastos GM, Pithon-Curi TC, Nader HB, Hirata MH. LDLR missense variants disturb structural conformation and LDLR activity in T-lymphocytes of Familial hypercholesterolemia patients. Gene X 2023; 853:147084. [PMID: 36464169 DOI: 10.1016/j.gene.2022.147084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/16/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022] Open
Abstract
Familial hypercholesterolemia (FH) is caused by deleterious mutations in the LDLR that increase markedly low-density lipoprotein (LDL) cholesterol and cause premature atherosclerotic cardiovascular disease. Functional effects of pathogenic LDLR variants identified in Brazilian FH patients were assessed using in vitro and in silico studies. Variants in LDLR and other FH-related genes were detected by exon-target gene sequencing. T-lymphocytes were isolated from 26 FH patients, and 3 healthy controls and LDLR expression and activity were assessed by flow cytometry and confocal microscopy. The impact of LDLR missense variants on protein structure was assessed by molecular modeling analysis. Ten pathogenic or likely pathogenic LDLR variants (six missense, two stop-gain, one frameshift, and one in splicing region) and six non-pathogenic variants were identified. Carriers of pathogenic and non-pathogenic variants had lower LDL binding and uptake in activated T-lymphocytes compared to controls (p < 0.05), but these variants did not influence LDLR expression on cell surface. Reduced LDL binding and uptake was also observed in carriers of LDLR null and defective variants. Modeling analysis showed that p.(Ala431Thr), p.(Gly549Asp) and p.(Gly592Glu) disturb intramolecular interactions of LDLR, and p.(Gly373Asp) and p.(Ile488Thr) reduce the stability of the LDLR protein. Docking and molecular interactions analyses showed that p.(Cys184Tyr) and p.(Gly373Asp) alter interaction of LDLR with Apolipoprotein B (ApoB). In conclusion, LDLR null and defective variants reduce LDL binding capacity and uptake in activated T-lymphocytes of FH patients and LDLR missense variants affect LDLR conformational stability and dissociation of the LDLR-ApoB complex, having a potential role in FH pathogenesis.
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Affiliation(s)
- Thais Kristini Almendros Barbosa
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil
| | - Rosario Dominguez Crespo Hirata
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil
| | - Glaucio Monteiro Ferreira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil; Laboratory of Molecular Research in Cardiology, Institute Dante Pazzanese of Cardiology, Sao Paulo 04012-909, Brazil
| | - Jéssica Bassani Borges
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil; Laboratory of Molecular Research in Cardiology, Institute Dante Pazzanese of Cardiology, Sao Paulo 04012-909, Brazil
| | - Victor Fernandes de Oliveira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil
| | - Renata Gorjão
- Interdisciplinary Post-graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo 01506-000, Brazil
| | - Elisangela Rodrigues da Silva Marçal
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil; Laboratory of Molecular Research in Cardiology, Institute Dante Pazzanese of Cardiology, Sao Paulo 04012-909, Brazil
| | | | - André Arpad Faludi
- Medical Clinic Division, Institute Dante Pazzanese of Cardiology, Sao Paulo 04012-909, Brazil
| | - Renata Caroline Costa de Freitas
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil; Department of Cardiac Surgery, Boston Children's Hospital, Boston, MA 02115, United States
| | - Carolina Dagli-Hernandez
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil
| | - Raul Hernandes Bortolin
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil; Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, United States
| | - Gisele Medeiros Bastos
- Laboratory of Molecular Research in Cardiology, Institute Dante Pazzanese of Cardiology, Sao Paulo 04012-909, Brazil; Department of Teaching and Research, Real e Benemerita Associaçao Portuguesa de Beneficiencia, Sao Paulo 01323-001, Brazil
| | - Tania Cristina Pithon-Curi
- Interdisciplinary Post-graduate Program in Health Sciences, Cruzeiro do Sul University, Sao Paulo 01506-000, Brazil
| | - Helena Bonciani Nader
- Department of Biochemistry, School of Medicine, Federal University of Sao Paulo, Sao Paulo 04044-020, Brazil
| | - Mario Hiroyuki Hirata
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil.
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13
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Coutinho ER, Miname MH, Rocha VZ, Bittencourt MS, Jannes CE, Krieger JE, Pereira AC, Santos RD. Cardiovascular disease onset in old people with severe hypercholesterolemia. Atherosclerosis 2023; 365:9-14. [PMID: 36646017 DOI: 10.1016/j.atherosclerosis.2022.12.007] [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: 08/11/2022] [Revised: 11/14/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIMS Familial hypercholesterolemia (FH) variants are associated with higher atherosclerotic cardiovascular disease risk (ASCVD) even when compared with other forms of severe hypercholesterolemia, especially in young people. Lipid lowering therapies (LLT) may change hypercholesterolemia natural history. This study aimed at evaluating factors associated with occurrence of ASCVD in old severe hypercholesterolemics diagnosed or not with FH and undergoing LLT. METHODS Hypercholesterolemic individuals ≥60 years participating on a genetic cascade screening for FH were divided in 4 groups (2 × 2) according to the presence (variant+) or not (variant-) of FH genetic variants and previous ASCVD (ASCVD+ and ASCVD-). Biomarkers associated with new incident ASCVD events were tested using Cox models. Continuous data shown as medians (%25; %75). RESULTS From 4,111 genotyped individuals, 377 (9.1%) were elderly [age 66 (63; 71) years], 28.9% males, 42.7% variant+, 32.1% with previous ASCVD, LLT duration 9 (5; 16) years, and on treatment LDL-cholesterol 144 (109; 200) mg/dL. After 4.8 (7; 3) years of follow up there were 47 incident events (12.4%, 2.7% patient/year). The annualized event rates were 0.8% (95% CI 0.36%; 1.70%), 2.3% (95% CI 1.3%; 4.1%), 5.2% (95% CI 2.8%; 9.7%) and 6.3% (95% CI 4.0%; 10.0%) respectively for groups variant-/ASCVD-, variant+/ASCVD-, variant-/ASCVD+ and, variant+/ASCVD+ (p log rank p < 0.001). Only presence of previous ASCVD was independently associated with incident ASCVD [hazard ratio 3.236 (95%CI 1.497-6.993, p = 0.003)]. No interaction was found for previous ASCVD and variants. CONCLUSIONS In old severe hypercholesterolemic individuals undergoing long-term LLT previous ASCVD was associated with incident events while FH causing variants were not.
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Affiliation(s)
- Elaine R Coutinho
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Marcio H Miname
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Viviane Z Rocha
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | | | - Cinthia E Jannes
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Jose E Krieger
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Alexandre C Pereira
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil; Genetics Department Harvard Medical School, Boston, MA, USA
| | - Raul D Santos
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil; Hospital Israelita Albert Einstein, Sao Paulo, Brazil.
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14
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Lima IR, Tada MT, Oliveira TG, Jannes CE, Bensenor I, Lotufo PA, Santos RD, Krieger JE, Pereira AC. Polygenic risk score for hypercholesterolemia in a Brazilian familial hypercholesterolemia cohort. ATHEROSCLEROSIS PLUS 2022; 49:47-55. [PMID: 36644206 PMCID: PMC9833269 DOI: 10.1016/j.athplu.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 06/03/2022] [Accepted: 06/24/2022] [Indexed: 01/18/2023]
Abstract
Background and aims Familial hypercholesterolemia (FH) is a genetic disorder characterized by high levels of LDL-C leading to premature cardiovascular disease (CAD). Only about 40% of individuals with a clinical diagnosis of FH have a causative genetic variant identified, and a proportion of genetically negative cases may have a polygenic cause rather than a still unidentified monogenic cause. This work aims to evaluate and validate the role of a polygenic risk score (PRS) associated with hypercholesterolemia in a Brazilian FH cohort and its clinical implications. Methods We analyzed a previously derived PRS of 12 and 6 SNPs (Single Nucleotide Polymorphism) in 684 FH individuals (491 mutation-negative [FH/M-], 193 mutation-positive [FH/M+]) and in 1605 controls. Coronary artery calcium (CAC) score was also evaluated. Results The PRS was independently associated with LDL-C in control individuals (p < 0.001). Within this group, in individuals in the highest quartile of the 12 SNPs PRS, the odds ratio for CAC score >100 was 1.7 (95% CI: 1.01-2.88, p = 0.04) after adjustment for age and sex. Subjects in the FH/M- group had the highest mean score in both 12 and 6 SNPs PRS (38.25 and 27.82, respectively) when compared to the other two groups (p = 2.2 × 10-16). Both scores were also higher in the FH/M+ group (36.48 and 26.26, respectively) when compared to the control group (p < 0.001 for the two scores) but inferior to the FH/M- group. Within FH individuals, the presence of a higher PRS score was not associated with LDL-C levels or with CAD risk. Conclusion A higher PRS is associated with significantly higher levels of LDL-C and it is independently associated with higher CAC in the Brazilian general population. A polygenic cause can explain a fraction of FH/M- individuals but does not appear to be a modulator of the clinical phenotype among FH individuals, regardless of mutation status.
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Affiliation(s)
- Isabella Ramos Lima
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil,Corresponding author.
| | - Mauricio Teruo Tada
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Theo G.M. Oliveira
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Cinthia Elim Jannes
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Isabela Bensenor
- Center for Clinical and Epidemiologic Research, University of São Paulo, São Paulo, Brazil
| | - Paulo A. Lotufo
- Center for Clinical and Epidemiologic Research, University of São Paulo, São Paulo, Brazil
| | - Raul D. Santos
- Lipid Clinic, Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil
| | - Jose E. Krieger
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Alexandre C. Pereira
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil,Genetics Department, Harvard Medical School, Boston, MA, USA,Corresponding author. Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
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15
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Izar MCO, Fonseca FAH. Triagem Direcionada da Hipercolesterolemia Familiar em 11 Pequenas Cidades Brasileiras: Uma Abordagem Eficaz para Detectar Agrupamentos de Indivíduos Afetados. Arq Bras Cardiol 2022; 118:678-679. [PMID: 35508044 PMCID: PMC9007013 DOI: 10.36660/abc.20220027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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16
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Oliveira GMMD, Brant LCC, Polanczyk CA, Malta DC, Biolo A, Nascimento BR, Souza MDFMD, Lorenzo ARD, Fagundes AADP, Schaan BD, Castilho FMD, Cesena FHY, Soares GP, Xavier GF, Barreto JAS, Passaglia LG, Pinto MM, Machline-Carrion MJ, Bittencourt MS, Pontes OM, Villela PB, Teixeira RA, Sampaio RO, Gaziano TA, Perel P, Roth GA, Ribeiro ALP. Estatística Cardiovascular – Brasil 2021. Arq Bras Cardiol 2022; 118:115-373. [PMID: 35195219 PMCID: PMC8959063 DOI: 10.36660/abc.20211012] [Citation(s) in RCA: 57] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 11/10/2021] [Indexed: 02/07/2023] Open
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17
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Silva PRDS, Jannes CE, Oliveira TG, Krieger JE, Santos RD, Pereira AC. Pharmacological treatment with lipid-lowering agents after molecular identification of familial hypercholesterolemia: results from the Hipercol Brasil cohort. J Clin Lipidol 2022; 16:198-207. [DOI: 10.1016/j.jacl.2022.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 01/05/2022] [Accepted: 01/12/2022] [Indexed: 10/19/2022]
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18
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Jannes CE, Silvino JPP, Silva PRDS, Lima IR, Tada MT, Oliveira TGM, Santos RD, Krieger JE, Pereira ADC. Rastreamento para Hipercolesterolemia Familiar em Pequenos Municípios: A Experiência do Programa HipercolBrasil em 11 Municípios Brasileiros. Arq Bras Cardiol 2021; 118:669-677. [PMID: 35137788 PMCID: PMC9007005 DOI: 10.36660/abc.20201371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 05/12/2021] [Indexed: 11/23/2022] Open
Abstract
Fundamento A hipercolesterolemia familiar (HF) é uma doença genética dominante que se caracteriza por níveis sanguíneos elevados de colesterol de lipoproteína de baixa densidade (LDL-C), e está associada à ocorrência de doença cardiovascular precoce. No Brasil, o HipercolBrasil, que é atualmente o maior programa de rastreamento em cascata para HF, já identificou mais de 2.000 indivíduos com variantes genéticas causadoras de HF. A abordagem padrão baseia-se no rastreamento em cascata de casos índices referidos, indivíduos com hipercolesterolemia e suspeita clínica de HF. Objetivos Realizar rastreamento direcionado de 11 pequenos municípios brasileiros com suspeita de alta prevalência de indivíduos com HF. Métodos A seleção dos municípios ocorreu de 3 maneiras: 1) municípios em que houve suspeita de efeito fundador (4 municípios); 2) municípios em uma região com altas taxas de infarto do miocárdio precoce, conforme descrito pelo banco de dados do Sistema Único de Saúde (2 municípios); e 3) municípios geograficamente próximos a outros municípios com alta prevalência de indivíduos com HF (5 municípios). A significância estatística foi considerada como valor p < 0,05. Resultados Foram incluídos 105 casos índices e 409 familiares de primeiro grau. O rendimento dessa abordagem foi de 4,67 familiares por caso índice, o qual é significativamente melhor (p < 0,0001) do que a taxa geral do HipercolBrasil (1,59). Identificamos 36 CIs com variante patogênica ou provavelmente patogênica para HF e 240 familiares de primeiro grau afetados. Conclusão: Nossos dados sugerem que, uma vez detectadas, regiões geográficas específicas justificam uma abordagem direcionada para a identificação de aglomerações de indivíduos com HF.
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19
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Leonardi-Bee J, Boateng C, Faria R, Eliman K, Young B, Qureshi N. Effectiveness of cascade testing strategies in relatives for familial hypercholesterolemia: A systematic review and meta-analysis. Atherosclerosis 2021; 338:7-14. [PMID: 34753031 DOI: 10.1016/j.atherosclerosis.2021.09.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 09/08/2021] [Accepted: 09/14/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND AIMS Cascade testing in relatives of index cases is the most cost-effective approach to identifying people with familial hypercholesterolemia (FH); however, it is currently unclear which strategy to contact relatives would be the most effective. A systematic review was performed to quantify the effectiveness of different strategies in cascade testing of FH. METHODS Comprehensive searches of three electronic databases and grey literature sources were done (from inception to May 2020). Screening, data extraction and assessments of methodological quality were made independently by two reviewers. Meta-analyses of proportions were performed using random effects models. Effect measures are reported as percentages with 95% confidence intervals. RESULTS 24 non-comparative studies were included, of which 11 used a direct, 8 used an indirect, and 5 used a combination of both direct and indirect cascade strategies. The median number of new relatives with FH per known index case was approximately 1. The combination strategy resulted in the largest yields of relatives tested for FH out of those contacted (40%, 95% CI 37%-42%, 1 study) and relatives responding to testing out of those contacted (54%, 1 study); however, the direct strategy had the largest yield of index cases participating in cascade testing out of those with FH confirmed (94%, 8 studies) compared to other strategies (p ≤ 0.01 for all comparisons). CONCLUSIONS Evidence is limited; however, a combination strategy, which allows the index case to decide on method of contacting relatives, appears to lead to better yields compared to using the direct or indirect strategy.
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Affiliation(s)
- Jo Leonardi-Bee
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, UK; Centre for Evidence Based Healthcare, Faculty of Medicine and Health Sciences, University of Nottingham, UK.
| | - Christabel Boateng
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, UK
| | - Rita Faria
- Centre for Health Economics, University of York, UK, USA
| | - Kelly Eliman
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, UK; Department of Global Public Health, Karolinska Institutet, Sweden
| | - Ben Young
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, UK
| | - Nadeem Qureshi
- Division of Primary Care, School of Medicine, University of Nottingham, UK
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20
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Izar MCDO, Giraldez VZR, Bertolami A, Santos Filho RDD, Lottenberg AM, Assad MHV, Saraiva JFK, Chacra APM, Martinez TLR, Bahia LR, Fonseca FAH, Faludi AA, Sposito AC, Chagas ACP, Jannes CE, Amaral CK, Araújo DBD, Cintra DE, Coutinho EDR, Cesena F, Xavier HT, Mota ICP, Giuliano IDCB, Faria Neto JR, Kato JT, Bertolami MC, Miname MH, Castelo MHCG, Lavrador MSF, Machado RM, Souza PGD, Alves RJ, Machado VA, Salgado Filho W. Update of the Brazilian Guideline for Familial Hypercholesterolemia - 2021. Arq Bras Cardiol 2021; 117:782-844. [PMID: 34709306 PMCID: PMC8528358 DOI: 10.36660/abc.20210788] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
| | - Viviane Zorzanelli Rocha Giraldez
- Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
- Grupo Fleury, São Paulo, SP - Brasil
| | | | | | - Ana Maria Lottenberg
- Hospital Israelita Albert Einstein (HIAE) - Faculdade Israelita de Ciências da Saúde Albert Einstein (FICSAE), São Paulo, SP - Brasil
- Faculdade de Medicina da Universidade de São Paulo, Laboratório de Lípides (LIM10), São Paulo, São Paulo, SP - Brasil
| | | | | | - Ana Paula M Chacra
- Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | | | | | | | | | - Andrei C Sposito
- Universidade Estadual de Campinas (UNICAMP), Campinas, SP - Brasil
| | | | - Cinthia Elim Jannes
- Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | | | | | | | | | - Fernando Cesena
- Hospital Israelita Albert Einstein (HIAE), São Paulo, SP - Brasil
| | | | | | | | | | | | | | - Marcio Hiroshi Miname
- Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
| | - Maria Helane Costa Gurgel Castelo
- Universidade Federal do Ceará (UFC), Fortaleza, CE - Brasil
- Hospital do Coração de Messejana, Fortaleza, CE - Brasil
- Professora da Faculdade Unichristus, Fortaleza, CE - Brasil
| | - Maria Sílvia Ferrari Lavrador
- Hospital Israelita Albert Einstein (HIAE) - Faculdade Israelita de Ciências da Saúde Albert Einstein (FICSAE), São Paulo, SP - Brasil
| | - Roberta Marcondes Machado
- Faculdade de Medicina da Universidade de São Paulo, Laboratório de Lípides (LIM10), São Paulo, São Paulo, SP - Brasil
| | - Patrícia Guedes de Souza
- Hospital Universitário Professor Edgard Santos da Universidade Federal da Bahia (UFBA), Salvador, BA - Brasil
| | | | | | - Wilson Salgado Filho
- Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo (FMUSP), São Paulo, SP - Brasil
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21
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Jackson CL, Huschka T, Borah B, Agre K, Zordok M, Farwati M, Moriarty J, Kullo IJ. Cost-effectiveness of cascade genetic testing for familial hypercholesterolemia in the United States: A simulation analysis. Am J Prev Cardiol 2021; 8:100245. [PMID: 34485965 PMCID: PMC8403726 DOI: 10.1016/j.ajpc.2021.100245] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 08/02/2021] [Accepted: 08/13/2021] [Indexed: 11/20/2022] Open
Abstract
Objective There is no coordinated cascade testing program for familial hypercholesterolemia (FH) in the U.S. We evaluated the contemporary cost-effectiveness of cascade genetic testing relatives of FH probands with a pathogenic variant. Methods A simulation model was created to simulate multiple family trees starting with progenitor individuals carrying a pathogenic variant for FH who were followed through several generations. This approach allowed us to examine a family tree that had grown sufficiently to have large numbers of relatives across multiple degrees of relatedness. The model estimated costs and life years gained (LYG) when cascade genetic testing was implemented for relatives of FH probands identified through standard care who were at or older than designated age thresholds (5, 10, 15, 20, 25, 30, 35, 40). Costs were valued in 2018 U.S. dollars. Future costs and LYG projected by the model were discounted at an annual rate of 3%. Results For 1st degree relatives, cascade testing at every age threshold resulted in a positive number of average LYG per person, though this number decreased as testing was started at higher age thresholds. Testing was not cost-effective if initiated at an age threshold of 40 and older but was cost-effective at younger age thresholds, with a discounted cost per LYG per person of less than $50,000. For 2nd degree relatives, testing was cost-effective with a screening age threshold of 10 but no longer cost-effective at a threshold of 15 or higher. In more distant relatives, cascade genetic testing was not beneficial or cost-effective. Conclusions Based on our simulation model, cascade genetic testing for FH in the U.S. is cost-effective if started before age 40 in 1st degree relatives and before age 15 in 2nd degree relatives.
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Affiliation(s)
| | - Todd Huschka
- Mayo Clinic Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN, United States
| | - Bijan Borah
- Mayo Clinic Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN, United States.,Division of Health Care Delivery Research, Mayo Clinic, Rochester, MN, United States
| | - Katherine Agre
- Clinical Genomics, Mayo Clinic, Rochester, MN, United States
| | - Magdi Zordok
- Department of Cardiovascular Medicine and the Gonda Vascular Center, Mayo Clinic, Rochester, MN, United States
| | - Medhat Farwati
- Department of Cardiovascular Medicine and the Gonda Vascular Center, Mayo Clinic, Rochester, MN, United States
| | - James Moriarty
- Mayo Clinic Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN, United States
| | - Iftikhar J Kullo
- Department of Cardiovascular Medicine and the Gonda Vascular Center, Mayo Clinic, Rochester, MN, United States.,Gonda Vascular Center, Mayo Clinic, Rochester, MN, United States
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22
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Peterson AL, McNeal CJ, Wilson DP. Prevention of Atherosclerotic Cardiovascular Disease in Children with Familial Hypercholesterolemia. Curr Atheroscler Rep 2021; 23:64. [PMID: 34453222 DOI: 10.1007/s11883-021-00959-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2021] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW Familial hypercholesterolemia (FH), a common inherited disorder of LDL-C metabolism that predisposes to premature cardiovascular disease, is underdiagnosed. Despite recommendations for screening all children and initiation of lipid-lowering medication beginning at 8-10 years of age, adherence to guidelines is low. Most individuals with FH are inadequately treated, especially women and children. The purpose of this review is to discuss current literature and recommendations for the diagnosis and treatment of heterozygous FH (HeFH) in the pediatric population. RECENT FINDINGS Twenty-year outcome data demonstrate lower rates of atherosclerotic cardiovascular disease (ASCVD) related events and death in individuals with FH who were treated with statins from childhood, compared to those who initiated statins in adulthood. While diagnosis rates of FH are slowly improving, most clinicians do not adhere to recommendations for cholesterol screening in youth. Identifying youth with FH offers the opportunity for early intervention to prevent ASCVD and identify affected relatives through reverse cascade screening.
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Affiliation(s)
- Amy L Peterson
- Department of Pediatrics, Division of Pediatric Cardiology, University of Wisconsin School of Medicine and Public Health, H6/534 CSC MC 4108 600 Highland Ave., Madison, WI, 53792, USA.
| | - Catherine J McNeal
- Division of Cardiology, Department of Internal Medicine Baylor Scott & White Health, 2301 S. 31st St., Temple, TX, 76508, USA
| | - Don P Wilson
- Don P. Wilson, MD, FNLA, Endowed Chair, Pediatric CV Health and Risk Prevention, Department of Pediatric Endocrinology, Cook Children's Medical Center, 1500 Cooper Street, 2nd Floor Dodson Bldg., Fort Worth, TX, 76104, USA
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23
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Borges JB, Oliveira VFD, Ferreira GM, Los B, Barbosa TKAA, Marçal EDSR, Dagli-Hernandez C, de Freitas RCC, Bortolin RH, Mori AA, Hirata TDC, Nakaya HTI, Bastos GM, Thurow HS, Gonçalves RM, Araujo DBD, Zatz HP, Bertolami A, Faludi AA, Bertolami MC, Sousa AGDMR, França JÍD, Jannes CE, Pereira ADC, Nakazone MA, Souza DRS, Carmo TS, Sampaio MF, Gorjão R, Pithon-Curi TC, Moriel P, Silbiger VN, Luchessi AD, de Araújo JNG, Naslavsky MS, Wang JYT, Kronenberger T, Cerda A, Lin-Wang HT, Garofalo AR, Fajardo CM, Hirata RDC, Hirata MH. Genomics, epigenomics and pharmacogenomics of familial hypercholesterolemia (FHBGEP): A study protocol. Res Social Adm Pharm 2021; 17:1347-1355. [DOI: 10.1016/j.sapharm.2020.10.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 10/08/2020] [Indexed: 02/08/2023]
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24
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Antoniazzi L, Arroyo-Olivares R, Bittencourt MS, Tada MT, Lima I, Jannes CE, Krieger JE, Pereira AC, Quintana-Navarro G, Muñiz-Grijalvo O, Díaz-Díaz JL, Alonso R, Mata P, Santos RD. Adherence to a Mediterranean diet, dyslipidemia and inflammation in familial hypercholesterolemia. Nutr Metab Cardiovasc Dis 2021; 31:2014-2022. [PMID: 34039501 DOI: 10.1016/j.numecd.2021.04.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/01/2021] [Accepted: 04/06/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND AND AIMS Familial Hypercholesterolemia (FH) is characterized by elevated LDL-cholesterol (LDL-C) and high atherosclerosis risk. The impact of different dietary patterns on atherosclerosis biomarkers has been poorly studied in FH. This study verified the association of adherence to a Mediterranean diet with biomarkers of dyslipidemia and low-grade inflammation in molecularly proven FH adults from Brazil (BR) and Spain (SP). METHODS AND RESULTS In this cross-sectional study adherence to the Mediterranean diet was assessed by a validated score and generalized estimating equations were used to evaluate its association with plasma LDL-C, apolipoprotein-B (ApoB) and high sensitivity C-reactive protein (hs-CRP) concentrations. We included 92 (mean age 45 years, 58.7% females) and 98 FH individuals (mean age 46.8 years, 60.2% females) respectively from BR and SP. FH causing variants did not differ between countries. LDL-C, ApoB and hs-CRP concentrations were higher in BR than in SP: 179 (135-250) and 161 (133-193) mg/dL; 141 (109-181) and 103 (88-134) mg/dL; and 1.6 (0.8-4.0) and 0.8 (0.4-1.5) mg/L respectively (all p < 0.001). Most of BR had low adherence (n = 77, 83.7%), while the majority of SP were divided into moderate (n = 35, 35.7%) and strong adherence to the Mediterranean diet (n = 37, 37.8%), p < 0.001. There was a significant inverse association of adherence to the Mediterranean diet score with higher LDL-C, ApoB, and hs-CRP after adjusting for socio economic parameters, caloric and fatty acid intakes as well as pharmacological lipid lowering therapies. CONCLUSIONS Higher adherence to a Mediterranean diet was associated with better dyslipidemia and low-grade inflammation profiles in FH.
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Affiliation(s)
- Luiza Antoniazzi
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | | | - Marcio S Bittencourt
- School of Medicine, Faculdade Israelita de Ciências da Saúde Albert Einstein, Sao Paulo, Brazil; Center for Clinical and Epidemiological Research, University Hospital, University of São Paulo School of Medicine, Sao Paulo, Brazil
| | - Mauricio T Tada
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Isabella Lima
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Cinthia E Jannes
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Jose E Krieger
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Alexandre C Pereira
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Gracia Quintana-Navarro
- Unidad de Lípidos y Arteriosclerosis, IMIBIC, Hospital Universitario Reina Sofía, Córdoba, Spain
| | | | - José L Díaz-Díaz
- Servicio de Medicina Interna, Hospital Abente y Lago, A Coruña, Spain
| | - Rodrigo Alonso
- Center for Advanced Metabolic Medicine and Nutrition, Santiago de Chile, Chile
| | - Pedro Mata
- Fundación Hipercolesterolemia Familiar, Madrid, Spain
| | - Raul D Santos
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil; Hospital Israelita Albert Einstein, São Paulo, Brazil.
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25
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Improvement of Definite Diagnosis of Familial Hypercholesterolemia Using an Expanding Genetic Analysis. JACC: ASIA 2021; 1:82-89. [PMID: 36338372 PMCID: PMC9627923 DOI: 10.1016/j.jacasi.2021.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/24/2021] [Accepted: 04/06/2021] [Indexed: 11/24/2022]
Abstract
Background The deeper understanding of the complex hereditary basis of familial hypercholesterolemia (FH) has raised the rationale of genetic testing, which has been underutilized in clinical practice. Objectives The present study aimed to explore the variant spectrum of FH in an expanding manner and compare its diagnostic performance. Methods A total of 169 Chinese individuals (124 index cases and 45 relatives) with clinical definite/probable FH were consecutively enrolled. Next-generation sequencing was performed for genetic analysis of 9 genes associated with hypercholesterolemia (major genes: LDLR, APOB, and PCSK9; minor genes: LDLRAP1, LIPA, STAP1, APOE, ABCG5, and ABCG8) including the evaluations of small-scale variants and large-scale copy number variants (CNVs). Results Among the 169 clinical FH patients included, 98 (58.0%) were men. A total of 85 (68.5%) index cases carried FH-associated variants. The proportion of FH caused by small-scale variants in LDLR, APOB, and PCSK9 genes was 62.1% and then increased by 6.5% when other genes and CNVs were further included. Furthermore, the variants in LDLR, APOB, and PCSK9 genes occupied 75% of all FH-associated variants. Of note, there were 8 non-LDLR CNVs detected in the present study. Conclusions LDLR, APOB, and PCSK9 genes should be tested in the initial genetic screening, although variants in minor genes also could explain phenotypic FH, suggesting that an expanding genetic testing may be considered to further explain phenotypic FH.
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26
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Santos RD, Pereira C, Cesena F, Laurinavicius AG, Tabone V, Bittencourt MS. Cardiovascular Risk Misperception and Low Awareness of Familial Hypercholesterolemia in Individuals with Severe Hypercholesterolemia. Arq Bras Cardiol 2021; 116:706-712. [PMID: 33566934 PMCID: PMC8121404 DOI: 10.36660/abc.20190516] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 02/03/2020] [Indexed: 12/17/2022] Open
Abstract
Fundamento Indivíduos com hipercolesterolemia grave apresentam alto risco de desenvolver doença cardiovascular aterosclerótica (DCVA). Muitos deles apresentam hipercolesterolemia familiar (HF). Objetivos Avaliar, a partir da perspectiva dos pacientes, o nível de conhecimento sobre a hipercolesterolemia grave, especialmente em relação a HF, DCVA, percepção de risco, desempenho do rastreamento em cascata e tratamento de indivíduos participantes de um programa de avaliação periódica de saúde. Métodos De um banco de dados de 70.000 brasileiros avaliados entre 2006 e 2016, 1.987 (2,8%) atenderam aos critérios de inclusão (idade ≥ 18 anos e LDL-C ≥ 190 mg/dL ou ≥ 160 mg/dL se sem uso de estatinas ou em terapia com estatinas, respectivamente). Desses, 200 foram aleatoriamente convidados a preencher um questionário extenso. A HF foi diagnosticada em caso de suspeita pelo médico responsável. Resultados Embora 97% da amostra (48±9 anos; 16% do sexo feminino; 95% com ensino superior; 88% em prevenção primária; LDL-C 209±47 mg/dL) tenha apresentado hipercolesterolemia grave, apenas 18% e 29,5% se consideravam de alto risco para desenvolver DCVA e relataram saber sua meta recomendada de LDL-C, respectivamente. Em relação à possibilidade de o colesterol alto ser uma doença hereditária, 58% relataram conhecimento sobre o fato; 24,5% (n = 49) já tinham ouvido falar em HF; e apenas 14% (n = 20) foram previamente identificados com suspeita de HF (idade ao diagnóstico de HF: 35±12 anos; 79% e 31% foram diagnosticados com > 30 e > 40 anos, respectivamente). Apenas 2,5% foram submetidos a testes genéticos; 17%, à rastreamento em cascata; e 17% não faziam uso de tratamento farmacológico. Conclusões Identificou-se uma importante lacuna na percepção de risco, no controle do colesterol e em aspectos relacionados à HF em indivíduos com hipercolesterolemia grave. (Arq Bras Cardiol. 2021; [online].ahead print, PP.0-0)
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Affiliation(s)
- Raul D Santos
- Hospital Israelita Albert Einstein , São Paulo , SP - Brasil.,Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de Sao Paulo , São Paulo , SP - Brasil
| | - Carolina Pereira
- Escola de Enfermagem Anna Nery , Universidade Federal do Rio de Janeiro , Rio de Janeiro , RJ - Brasil
| | - Fernando Cesena
- Hospital Israelita Albert Einstein , São Paulo , SP - Brasil
| | | | - Viviane Tabone
- Hospital Israelita Albert Einstein , São Paulo , SP - Brasil
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Vlad CE, Foia LG, Popescu R, Popa I, Aanicai R, Reurean-Pintilei D, Toma V, Florea L, Kanbay M, Covic A. Molecular Genetic Approach and Evaluation of Cardiovascular Events in Patients with Clinical Familial Hypercholesterolemia Phenotype from Romania. J Clin Med 2021; 10:jcm10071399. [PMID: 33807407 PMCID: PMC8036385 DOI: 10.3390/jcm10071399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/26/2021] [Accepted: 03/28/2021] [Indexed: 12/13/2022] Open
Abstract
This study identifies the genetic background of familial hypercholesterolemia (FH) patients in Romania and evaluates the association between mutations and cardiovascular events. We performed a prospective observational study of 61 patients with a clinical diagnosis of FH selected based on Dutch Lipid Clinic Network (DLCN) and Simon Broome score between 2017 and 2020. Two techniques were used to identify mutations: multiplex ligation-dependent probe amplification (MLPA) and Sanger sequencing. The mutation rate was 37.7%, i.e., 23 patients with mutations were identified, of which 7 subjects had pathogenic mutations and 16 had polymorphisms. Moreover, 10 variants of the low-density lipoprotein receptor (LDLR) gene were identified in 22 patients, i.e., one variant of the proprotein convertase subtilisin/kexin type 9 (PCSK9) gene in six patients, and one variant of the apolipoprotein B (APOB) gene in three patients. Of the LDLR gene variants, four were LDLR pathogenic mutations (c.81C > G, c.502G > A, c.1618G > A mutations in exon 2, exon 4, exon 11, and exon 13–15 duplication). The PCSK9 and APOB gene variants were benign mutations. The pathogenic LDLR mutations were significant predictors of the new cardiovascular events, and the time interval for new cardiovascular events occurrence was significantly decreased, compared to FH patients without mutations. In total, 12 variants were identified, with four pathogenic variants identified in the LDLR gene, whereas 62.3% of the study population displayed no pathological mutations.
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Affiliation(s)
- Cristiana-Elena Vlad
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
- Department of Nephrology-Internal Medicine, “Dr. C.I. Parhon” Clinical Hospital, Carol I Street, No 50, 700503 Iasi, Romania
| | - Liliana Georgeta Foia
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
- Department of Biochemistry, “Sf. Spiridon” Clinical County Hospital, Independentei Street, 700111 Iasi, Romania
- Correspondence: ; Tel.: +40-744704452
| | - Roxana Popescu
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
| | - Ioana Popa
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
| | - Ruxandra Aanicai
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
| | - Delia Reurean-Pintilei
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
| | - Vasilica Toma
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
| | - Laura Florea
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
- Department of Nephrology-Internal Medicine, “Dr. C.I. Parhon” Clinical Hospital, Carol I Street, No 50, 700503 Iasi, Romania
| | - Mehmet Kanbay
- Department of Medicine, Division of Nephrology, Koc University School of Medicine, 34450 Istanbul, Turkey;
| | - Adrian Covic
- Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street, No 16, 700115 Iasi, Romania; (C.-E.V.); (R.P.); (I.P.); (R.A.); (D.R.-P.); (V.T.); (L.F.); (A.C.)
- Department of Nephrology-Internal Medicine, “Dr. C.I. Parhon” Clinical Hospital, Carol I Street, No 50, 700503 Iasi, Romania
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Leren TP, Bogsrud MP. Molecular genetic testing for autosomal dominant hypercholesterolemia in 29,449 Norwegian index patients and 14,230 relatives during the years 1993-2020. Atherosclerosis 2021; 322:61-66. [PMID: 33740630 DOI: 10.1016/j.atherosclerosis.2021.02.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/15/2021] [Accepted: 02/18/2021] [Indexed: 11/15/2022]
Abstract
BACKGROUND AND AIMS In this study, we present the status regarding molecular genetic testing for mutations in the genes encoding the low density lipoprotein receptor (LDLR), apolipoprotein B (APOB) and proprotein convertase subtilisin/kexin type 9 (PCSK9) as causes of autosomal dominant hypercholesterolemia (ADH) in Norway. METHODS We have extracted data from the laboratory information management system at Unit for Cardiac and Cardiovascular Genetics, Oslo University Hospital for the period 1993-2020. This laboratory is the sole laboratory performing molecular genetic testing for ADH in Norway. RESULTS A total of 29,449 unrelated hypercholesterolemic patients have been screened for mutations in the LDLR gene, in the APOB gene and in the PCSK9 gene. Of these, 2818 (9.6%) were heterozygotes and 11 were homozygotes or compound heterozygotes. Most of the 264 different mutations identified were found in the LDLR gene. Only two and three mutations were found in the APOB gene or in the PCSK9 gene, respectively. Several founder mutations were identified. After testing of 14,230 family members, a total of 8811 heterozygous patients have been identified. Of these, 94.0% had a mutation in the LDLR gene, 5.4% had a mutation in the APOB gene and 0.6% had a mutation in the PCSK9 gene. CONCLUSIONS A large proportion of Norwegian ADH patients have been provided with a molecular genetic diagnosis. Norway is probably only second to the Netherlands in this respect. A molecular genetic diagnosis may form the basis for starting proper preventive measures and for identifying affected family members by cascade genetic screening.
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Affiliation(s)
- Trond P Leren
- Unit for Cardiac and Cardiovascular Genetics, Department of Medical Genetics, Oslo University Hospital, Oslo, Norway.
| | - Martin Prøven Bogsrud
- Unit for Cardiac and Cardiovascular Genetics, Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
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Mehta R, Martagon AJ, Galan Ramirez GA, Antonio-Villa NE, Vargas-Vázquez A, Elias-Lopez D, Gonzalez-Retana G, Rodríguez-Encinas B, Ceballos-Macías JJ, Romero-Zazueta A, Martinez-Alvarado R, Morales-Portano JD, Alvarez-Lopez H, Sauque-Reyna L, Gomez-Herrera LG, Simental-Mendia LE, Garcia-Aguilar H, Ramirez-Cooremans E, Peña-Aparicio B, Mendoza-Zubieta V, Carrillo-Gonzalez PA, Ferreira-Hermosillo A, Caracas-Portilla N, Jimenez-Dominguez G, Ruiz-Garcia AY, Arriaga-Cazares HE, Gonzalez-Gonzalez JR, Mendez-Valencia CV, Padilla FG, Madriz-Prado R, De Los Rios-Ibarra MO, Vazquez-Cardenas A, Arjona-Villicaña RD, Acevedo-Rivera KJ, Allende-Carrera R, Alvarez JA, Amezcua-Martinez JC, de Los Reyes Barrera-Bustillo M, Carazo-Vargas G, Contreras-Chacon R, Figueroa-Andrade MH, Flores-Ortega A, Garcia-Alcala H, Garcia de Leon LE, Garcia-Guzman B, Garduño-Garcia JJ, Garnica-Cuellar JC, Gomez-Cruz JR, Hernandez-Garcia A, Holguin-Almada JR, Juarez-Herrera U, Lugo-Sobrevilla F, Marquez-Rodriguez E, Martinez-Sibaja C, Medrano-Rodriguez AB, Morales-Oyervides JC, Perez-Vazquez DI, Reyes-Rodriguez EA, Robles-Osorio ML, Rosas-Saucedo J, Torres-Tamayo M, Valdez-Talavera LA, Vera-Arroyo LE, Zepeda-Carrillo EA, Aguilar-Salinas CA. Familial hypercholesterolemia in Mexico: Initial insights from the national registry. J Clin Lipidol 2021; 15:124-133. [PMID: 33422452 DOI: 10.1016/j.jacl.2020.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 11/18/2020] [Accepted: 12/04/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND Familial hypercholesterolemia (FH) remains underdiagnosed and undertreated. OBJECTIVE Report the results of the first years (2017-2019) of the Mexican FH registry. METHODS There are 60 investigators, representing 28 federal states, participating in the registry. The variables included are in accordance with the European Atherosclerosis Society (EAS) FH recommendations. RESULTS To date, 709 patients have been registered, only 336 patients with complete data fields are presented. The mean age is 50 (36-62) years and the average time since diagnosis is 4 (IQR: 2-16) years. Genetic testing is recorded in 26.9%. Tendon xanthomas are present in 43.2%. The prevalence of type 2 diabetes is 11.3% and that of premature CAD is 9.8%. Index cases, male gender, hypertension and smoking were associated with premature CAD. The median lipoprotein (a) level is 30.5 (IQR 10.8-80.7) mg/dl. Statins and co-administration with ezetimibe were recorded in 88.1% and 35.7% respectively. A combined treatment target (50% reduction in LDL-C and an LDL-C <100 mg/dl) was achieved by 13.7%. Associated factors were index case (OR 3.6, 95%CI 1.69-8.73, P = .002), combination therapy (OR 2.4, 95%CI 1.23-4.90, P = .011), type 2 diabetes (OR 2.8, 95%CI 1.03-7.59, P = .036) and age (OR 1.023, 95%CI 1.01-1.05, P = .033). CONCLUSION The results confirm late diagnosis, a lower than expected prevalence and risk of ASCVD, a higher than expected prevalence of type 2 diabetes and undertreatment, with relatively few patients reaching goals. Recommendations include, the use of combination lipid lowering therapy, control of comorbid conditions and more frequent genetic testing in the future.
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Affiliation(s)
- Roopa Mehta
- Unidad de Investigación de Enfermedades Metabolicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran, México City, Mexico; Departamento de Endocrinologia y Metabolismo, Instituto Nacional de Ciencias Médicas y Nutricion Salvador Zubiran, Mexico City, Mexico
| | - Alexandro J Martagon
- Unidad de Investigación de Enfermedades Metabolicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran, México City, Mexico; Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo Leon, Mexico
| | - Gabriela A Galan Ramirez
- Unidad de Investigación de Enfermedades Metabolicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran, México City, Mexico
| | - Neftali Eduardo Antonio-Villa
- Unidad de Investigación de Enfermedades Metabolicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran, México City, Mexico
| | - Arsenio Vargas-Vázquez
- Unidad de Investigación de Enfermedades Metabolicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran, México City, Mexico
| | - Daniel Elias-Lopez
- Unidad de Investigación de Enfermedades Metabolicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran, México City, Mexico; Departamento de Endocrinologia y Metabolismo, Instituto Nacional de Ciencias Médicas y Nutricion Salvador Zubiran, Mexico City, Mexico
| | - Gustavo Gonzalez-Retana
- Departamento de Endocrinologia y Metabolismo, Instituto Nacional de Ciencias Médicas y Nutricion Salvador Zubiran, Mexico City, Mexico
| | - Bethsabel Rodríguez-Encinas
- Departamento de Endocrinologia y Metabolismo, Instituto Nacional de Ciencias Médicas y Nutricion Salvador Zubiran, Mexico City, Mexico
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Guadalupe Jimenez-Dominguez
- Hospital General Zona #46 IMSS, Villahermosa, Tabasco, Mexico; Hospital Angeles de Villahermosa, Tabasco, Mexico
| | | | - Hector E Arriaga-Cazares
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo Leon, Mexico; Centro Medico Nacional del Noreste IMSS, Monterrey, Nuevo Leon, Mexico
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Carlos A Aguilar-Salinas
- Unidad de Investigación de Enfermedades Metabolicas, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran, México City, Mexico; Departamento de Endocrinologia y Metabolismo, Instituto Nacional de Ciencias Médicas y Nutricion Salvador Zubiran, Mexico City, Mexico; Direccion de Nutricion, Instituto Nacional de Ciencias Médicas y Nutricion Salvador Zubiran, Mexico City, Mexico; Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo Leon, Mexico.
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Coutinho ER, Miname MH, Rocha VZ, Bittencourt MS, Jannes CE, Tada MT, Lima IR, Filho WS, Chacra AP, Pereira AC, Krieger JE, Santos RD. Familial hypercholesterolemia and cardiovascular disease in older individuals. Atherosclerosis 2020; 318:32-37. [PMID: 33450476 DOI: 10.1016/j.atherosclerosis.2020.12.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 12/09/2020] [Accepted: 12/16/2020] [Indexed: 12/29/2022]
Abstract
BACKGROUND AND AIMS Familial hypercholesterolemia (FH) is characterized by high LDL-cholesterol (LDL-C) and early atherosclerotic cardiovascular disease (ASCVD). With a lipid lowering therapy (LLT), most individuals with FH may have a longer ASCVD-free survival. However, there is scant data about older individuals with FH. METHODS We compared characteristics of genetically defined FH older individuals with age-matched non-FH counterparts. RESULTS From 4111 genotyped individuals, 462 older than 60 years were included (198 positive and 264 negative for FH variants). There were no differences regarding median age [%25; 75%] 66.0 (62.0; 71.0) and 66.0 (62.2; 71.0) years, p = 0.68 for FH and non-FH, respectively. In both groups, there was a higher frequency of females, however, there were more males in the FH group 37.4% vs. 24.2%, p = 0.002. No differences were seen between FH and non-FH in LLT use: 88.5% vs. 91.5%, p = 0.29. Despite a longer LLT duration in FH patients (with 11.0 (7.0; 20.0) vs. 7.0 (3.0; 13.0) years, p < 0.001), treatment was started late in both groups: at 54.0 (47.0; 61.0) and 59.0 (52.0; 64.0) years, p < 0.001, in FH and non-FH, respectively. FH had greater frequencies of previous and early ASCVD (40.9% vs. 27.3%, p = 0.002, and 22.2% vs. 9.0%, p < 0.001). In FH, male sex [HR (95%CI)] 2.67 (1.50-4.73), p = 0.001, and LLT onset age 0.96 (0.93-0.99), p = 0.009, were independently associated with ASCVD. CONCLUSIONS Among hypercholesterolemic older individuals participating in a cascade screening program, the genetic diagnosis of FH was associated with higher ASCVD rates, emphasizing the relevance of a monogenic defect as the cause of long-lasting hypercholesterolemia and ASCVD risk, particularly in men.
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Affiliation(s)
- Elaine R Coutinho
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Marcio H Miname
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Viviane Z Rocha
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Marcio S Bittencourt
- Center for Clinical and Epidemiological Research, University Hospital, University of Sao Paulo, Sao Paulo, Brazil
| | - Cinthia E Jannes
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Mauricio T Tada
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Isabella R Lima
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Wilson Salgado Filho
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Ana P Chacra
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Alexandre C Pereira
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Jose E Krieger
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil
| | - Raul D Santos
- Heart Institute (InCor), University of São Paulo, Medical School Hospital (FMUSP), Sao Paulo, Brazil; Academic Research Organization, Hospital Israelita Albert Einstein, Sao Paulo, Brazil.
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de Paiva Silvino JP, Jannes CE, Tada MT, Lima IR, Silva IDFO, Pereira AC, Gomes KB. Cascade screening and genetic diagnosis of familial hypercholesterolemia in clusters of the Southeastern region from Brazil. Mol Biol Rep 2020; 47:9279-9288. [PMID: 33231818 DOI: 10.1007/s11033-020-06014-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/16/2020] [Indexed: 01/04/2023]
Abstract
Familial hypercholesterolemia (FH) is an autosomal dominant genetic disease characterized by high levels of low-density lipoprotein-cholesterol (LDLc), associated to premature cardiovascular disease. The detection of the variants related to FH is important to improve the early diagnosis in probands / index-cases (ICs) and their relatives. We included ICs with FH and their relatives, living in a small region of Minas Gerais state-Brazil, which were classified according to Dutch Lipid Clinic Network Criteria (DLCNC) and submitted to sequencing of genes related to FH (LDLR, APOB, PCSK9, LDLRAP1, LIPA, STAP1, APOE, ABCG5 e ABCG8). In a total of 143 subjects (32 ICs and 111 relatives), eight variants were identified in 91 individuals. From these variants, five were in LDLR [p.(Asp224Asn), p.(Ser854Gly), p.(Cys34Arg), p.(Asp601His), deletion of exon15 in LDLR)], one in APOB [p.(Met499Val)], one in PCSK9 [p.(Arg237Trp)] and one in APOE [p.(Pro28Leu)] genes. The variants were detected in 100% of those subjects classified as definitive, 87% as probable and 69% as possible FH cases based on DLCNC. The LDLc level was higher in individuals with corneal arch and xanthomas or xanthelasmas, as well as in pathogenic or probably pathogenic variants carriers. This study showed higher frequency of LDLR gene variants compared to other genes related to LDL metabolism in individuals with FH in Minas Gerais - Brazil and the presence of FH in relatives without previous diagnosis. Our data reinforce the importance of molecular and clinical evaluation of FH relatives in order to early diagnosis the FH, as well as cardiovascular diseases prevention.
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Affiliation(s)
| | - Cinthia Elim Jannes
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração de São Paulo (INCOR), Hospital das Clínicas da Universidade de São Paulo, São Paulo, Brazil
| | - Mauricio Teruo Tada
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração de São Paulo (INCOR), Hospital das Clínicas da Universidade de São Paulo, São Paulo, Brazil
| | - Isabella Ramos Lima
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração de São Paulo (INCOR), Hospital das Clínicas da Universidade de São Paulo, São Paulo, Brazil
| | - Iêda de Fátima Oliveira Silva
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Alexandre Costa Pereira
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração de São Paulo (INCOR), Hospital das Clínicas da Universidade de São Paulo, São Paulo, Brazil
| | - Karina Braga Gomes
- Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerias, Brazil. .,Faculdade de Farmácia, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais, Brazil.
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Truong TH, Do DL, Kim NT, Nguyen MNT, Le TT, Le HA. Genetics, Screening, and Treatment of Familial Hypercholesterolemia: Experience Gained From the Implementation of the Vietnam Familial Hypercholesterolemia Registry. Front Genet 2020; 11:914. [PMID: 32922439 PMCID: PMC7457124 DOI: 10.3389/fgene.2020.00914] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 07/23/2020] [Indexed: 12/12/2022] Open
Abstract
Familial hypercholesterolemia (FH) is underdiagnosed and undertreated in a majority of the low- and middle-income countries. FH registries could prove useful in bridging the knowledge gaps, supporting genetic and clinical research, and improving health-care planning and patient care. Here, we report the first usage experience of the Vietnam FH (VINAFH) Registry. The VINAFH Registry was established in 2016 as a long-term database for prospective cohorts. FH patients were detected based on the opportunistic and cascade screening. Diagnosis of FH was assessed using the Dutch Lipid Clinic Network criteria, plasma levels of low-density lipoprotein (LDL) cholesterol, and genetic testing. To date, a total of 130 patients with FH have been registered, with 48 index cases and 82 relatives. Of the 130 patients, 8 were homozygous FH patients and 38 were children. Of FH individuals, 46.7% was confirmed by genetic testing: 61 patients (96.8%) carried the LDLR mutation (c.681C > G, c.1427C > G, c.1187-?_2140 ± ?del, c.2529_2530delinsA), and two patients (3.2%) carried the PCSK9 (protein convertase subtilisin/kexin type 9) mutation (c.42_43insTG). The c.2529_2530delinsA mutation detected in this study is novel and reported only in the Vietnamese population. However, only 53.8% of FH patients were followed up post diagnosis, and only 15.3% of these were approved for lipid-lowering therapy and specialized care. Notably, factors such as knowledge about FH in patients and/or guardians of FH children and support of primary care physicians affected patient participation with respect to treatment strategies and follow-up. Genetic identification, screening, and treatment of FH were feasible in Vietnam. The VINAFH Registry significantly contributed to the formation of the government agencies legislative acts that established the importance of FH as a socially and medically important disease requiring appropriate management strategies. Other low- and middle-income countries could, thus, use the VINAFH Registry model as a reference to establish programs for FH management according to the current status.
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Affiliation(s)
- Thanh-Huong Truong
- Vietnam National Heart Institute, Bach Mai Hospital, Hanoi, Vietnam.,Department of Cardiology, Hanoi Medical University, Hanoi, Vietnam
| | - Doan-Loi Do
- Vietnam National Heart Institute, Bach Mai Hospital, Hanoi, Vietnam.,Department of Cardiology, Hanoi Medical University, Hanoi, Vietnam
| | - Ngoc-Thanh Kim
- Vietnam National Heart Institute, Bach Mai Hospital, Hanoi, Vietnam.,Department of Cardiology, Hanoi Medical University, Hanoi, Vietnam
| | - Mai-Ngoc Thi Nguyen
- Vietnam National Heart Institute, Bach Mai Hospital, Hanoi, Vietnam.,Department of Cardiology, Hanoi Medical University, Hanoi, Vietnam
| | - Thanh-Tung Le
- Vietnam National Heart Institute, Bach Mai Hospital, Hanoi, Vietnam
| | - Hong-An Le
- School of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam
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Tada H, Hori M, Nomura A, Hosomichi K, Nohara A, Kawashiri MA, Harada-Shiba M. A catalog of the pathogenic mutations of LDL receptor gene in Japanese familial hypercholesterolemia. J Clin Lipidol 2020; 14:346-351.e9. [PMID: 32331935 DOI: 10.1016/j.jacl.2020.03.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 03/16/2020] [Accepted: 03/16/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND Little data exist on the pathogenic mutations of LDL receptor in Japanese familial hypercholesterolemia (FH). OBJECTIVE We aimed to catalog the pathogenic mutations of LDL receptor gene in the 2 major Japanese FH-care centers (Kanazawa University and National Cerebral and Cardiovascular Center Research Institute), where genetic testing of FH has been performed centrally on requests from institutes all over Japan during more than past 2 decades. METHODS 796 FH subjects from 472 families who had nonsynonymous mutations in LDL receptor gene were included in this study. Genetic mutations were analyzed for mutations by Sanger sequencing as well as by multiplex ligation probe dependent amplification technique for large rearrangements. Pathogenic mutations were defined either as 1) protein truncated variants, 2) registered as pathogenic in ClinVar, or Human Gene Mutation Database (HGMD), or meet the criteria of American College of Medical Genetics and Genomics guideline, or 3) CADD score > 10. RESULTS We found 138 different mutations. Among them, 132 mutations were considered as pathogenic, including 19 large rearrangement mutations. However, 6 missense mutations were classified as variants of unknown significance. A single mutation accounted for as much as 41% of the FH subjects recruited from Kanazawa University mainly due to founder gene effect, whereas many singleton mutations were found from National Cerebral and Cardiovascular Center Research Institute located in Osaka. CONCLUSIONS We provided the largest catalog of pathogenic mutations of LDL receptor gene in Japanese FH. This could aid to determine the pathogenicity of the LDL receptor genetic mutations not only in Japanese but also in other ethnicities.
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Affiliation(s)
- Hayato Tada
- Department of Cardiovascular Medicine, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Mika Hori
- Department of Molecular Innovation in Lipidology, National Cerebral and Cardiovascular Center Research Institute, Suita, Japan
| | - Akihiro Nomura
- Department of Cardiovascular Medicine, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kazuyoshi Hosomichi
- Department of Bioinformatics and Genomics, Graduate School of Advanced Preventive Medical Sciences, Kanazawa, Japan
| | - Atsushi Nohara
- Department of Genetics, Ishikawa Prefectural Central Hospital, Kanazawa, Japan
| | - Masa-Aki Kawashiri
- Department of Cardiovascular Medicine, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan.
| | - Mariko Harada-Shiba
- Department of Molecular Innovation in Lipidology, National Cerebral and Cardiovascular Center Research Institute, Suita, Japan
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Garg A, Fazio S, Duell PB, Baass A, Udata C, Joh T, Riel T, Sirota M, Dettling D, Liang H, Garzone PD, Gumbiner B, Wan H. Molecular Characterization of Familial Hypercholesterolemia in a North American Cohort. J Endocr Soc 2019; 4:bvz015. [PMID: 31993549 DOI: 10.1210/jendso/bvz015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/25/2019] [Indexed: 01/16/2023] Open
Abstract
Background Familial hypercholesterolemia (FH) confers a very high risk of premature cardiovascular disease and is commonly caused by mutations in low-density lipoprotein receptor (LDLR), apolipoprotein B (APOB), or proprotein convertase subtilisin/kexin type 9 (PCSK9) and very rarely in LDLR adaptor protein 1 (LDLRAP1) genes. Objective To determine the prevalence of pathogenic mutations in the LDLR, APOB, and PCSK9 in a cohort of subjects who met Simon Broome criteria for FH and compare the clinical characteristics of mutation-positive and mutation-negative subjects. Methods Ninety-three men and 107 women aged 19 to 80 years from lipid clinics in the United States and Canada participated. Demographic and historical data were collected, physical examination performed, and serum lipids/lipoproteins analyzed. Targeted sequencing analyses of LDLR and PCSK9 coding regions and exon 26 of APOB were performed followed by detection of LDLR deletions and duplications. Results Disease-causing LDLR and APOB variants were identified in 114 and 6 subjects, respectively. Of the 58 LDLR variants, 8 were novel mutations. Compared with mutation-positive subjects, mutation-negative subjects were older (mean 49 years vs 57 years, respectively) and had a higher proportion of African Americans (1% vs 12.5%), higher prevalence of hypertension (21% vs 46%), and higher serum triglycerides (median 86 mg/dL vs 122 mg/dL) levels. Conclusions LDLR mutations were the most common cause of heterozygous FH in this North American cohort. A strikingly high proportion of FH subjects (40%) lacked mutations in known culprit genes. Identification of underlying genetic and environmental factors in mutation-negative patients is important to further our understanding of the metabolic basis of FH and other forms of severe hypercholesterolemia.
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Affiliation(s)
- Abhimanyu Garg
- Division of Nutrition and Metabolic Diseases, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas
| | - Sergio Fazio
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, Oregon
| | - P Barton Duell
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, Oregon
| | - Alexis Baass
- Institut de Recherches Cliniques de Montreal, Montreal, Canada
| | | | | | - Tom Riel
- Pfizer Inc., South San Francisco, California
| | | | | | - Hong Liang
- Pfizer Inc., South San Francisco, California
| | | | | | - Hong Wan
- Pfizer Inc., South San Francisco, California
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Association of dietary components with dyslipidemia and low-grade inflammation biomarkers in adults with heterozygous familial hypercholesterolemia from different countries. Eur J Clin Nutr 2019; 73:1622-1625. [DOI: 10.1038/s41430-019-0529-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 10/23/2019] [Accepted: 10/28/2019] [Indexed: 11/08/2022]
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Lee C, Rivera-Valerio M, Bangash H, Prokop L, Kullo IJ. New Case Detection by Cascade Testing in Familial Hypercholesterolemia: A Systematic Review of the Literature. CIRCULATION. GENOMIC AND PRECISION MEDICINE 2019; 12:e002723. [PMID: 31638829 PMCID: PMC9875692 DOI: 10.1161/circgen.119.002723] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND The prevalence of familial hypercholesterolemia is 1 in 250, but <10% of patients are diagnosed. Cascade testing enables early detection of cases through systematic family tracing. Establishment of familial hypercholesterolemia cascade testing programs in the US could be informed by approaches used elsewhere. METHODS We conducted a systematic review of published studies in the English language of cascade testing for familial hypercholesterolemia, which reported the number of index cases and number of relatives tested and specified methods of contacting relatives and testing modalities methods utilized. For each study, we calculated yield (proportion of relatives who test positive) and new cases per index case, to facilitate comparison. RESULTS We identified 10 studies from the literature that met inclusion criteria; the mean number of probands and relatives per study was 242 and 826, respectively. The average yield was 44.76% with a range of 30% to 60.5%, and the mean new cases per index case was 1.65 with a range of 0.22 to 8.0. New cases per index case tended to be greater in studies that used direct contact versus indirect contact (2.06 versus 0.86), tested beyond first-degree relatives versus only first-degree relatives (3.65 versus 0.80), used active sample collection versus collection at clinic (4.11 versus 1.06), and utilized genetic testing versus biochemical testing (2.47 versus 0.42). CONCLUSIONS New case detection in familial hypercholesterolemia cascade testing programs tended to be higher with direct contact of relatives, testing beyond first-degree relatives, in-home-based sample collection, and genetic testing. These findings should be helpful for establishing cascade testing programs in the United States.
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Affiliation(s)
- Christopher Lee
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | | | - Hana Bangash
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | - Larry Prokop
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
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Souto AC, Miname MH, Fukushima J, Jannes CE, Krieger JE, Hagger M, Pereira AC, Santos RD. Health related quality of life in individuals at high risk for familial hypercholesterolemia undergoing genetic cascade screening in Brazil. Atherosclerosis 2019; 277:464-469. [PMID: 30270086 DOI: 10.1016/j.atherosclerosis.2018.05.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 04/25/2018] [Accepted: 05/22/2018] [Indexed: 01/20/2023]
Abstract
BACKGROUND AND AIMS Familial hypercholesterolemia (FH) is a genetic disorder associated with high risk of early major cardiovascular events (MACE) that can impact the health related quality of life (HRQoL), however, this association is unclear. This study evaluated HRQoL in index cases (IC) and first-degree relatives (FDR) of individuals at high risk of FH undergoing genetic cascade screening. METHODS Data collection was performed before awareness of molecular diagnosis results. Individuals were divided into four groups according to the molecular diagnosis: IC with (IC+) and without (IC-) identified mutations (n = 93 and n = 175, respectively), and affected (FDR+, n = 231) and non-affected (FDR-, n = 159) FDR of IC+. HRQoL measurements, mental (MCS) and physical component (PCS) scores were carried out with SF-12 questionnaire. Associations were tested by generalized linear models. RESULTS The mean age was 49 ± 15 years, 42.2% were men, MACE had occurred in 30.7%. Overall, both PCS and MCS did not differ between FH and non-FH individuals, however, IC trended to have lower PCS independent of FH presence (p=0.003). Lower PCS were associated with female sex (p=0.018), lower education (p<0.001), professional inactivity (p=0.028), previous MACE occurrence (p<0.001), hypertension (p=0.016), depression (p<0.001) and obesity (p<0.001). Lower MCS were associated with female sex (p=0.009), previous MACE occurrence (p=0.034), depression (p<0.001) and smoking (p=0.009). Neither the presence of FH causing mutations nor pharmacological lipid lowering treatment was associated with HRQoL. CONCLUSIONS HRQoL is not reduced in both IC and FDR FH individuals in comparison with their non-affected counterparts. Previous MACE and co-morbidities are associated with reduced HRQoL.
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Affiliation(s)
- Ana Cristina Souto
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Marcio H Miname
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Julia Fukushima
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Cinthia E Jannes
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Jose E Krieger
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Martin Hagger
- Faculty of Sport and Health Sciences, University of Jyva ¨skyla, Finland; School of Psychology, Curtin University, Australia; School of Applied Psychology, Griffith University, Australia
| | - Alexandre C Pereira
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Raul D Santos
- Heart Institute (InCor) University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil; Hospital Israelita Albert Einstein, Sao Paulo, Brazil.
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Miname MH, Santos RD. Reducing cardiovascular risk in patients with familial hypercholesterolemia: Risk prediction and lipid management. Prog Cardiovasc Dis 2019; 62:414-422. [PMID: 31669498 DOI: 10.1016/j.pcad.2019.10.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 10/23/2019] [Indexed: 01/17/2023]
Abstract
Familial hypercholesterolemia (FH) is a frequent genetic disorder characterized by elevated low-density lipoprotein (LDL)-cholesterol (LDL-C) levels and early onset of atherosclerotic cardiovascular disease. FH is caused by mutations in genes that regulate LDL catabolism, mainly the LDL receptor (LDLR), apolipoprotein B (APOB) and gain of function of proprotein convertase subtilisin kexin type 9 (PCSK9). However, the phenotype may be encountered in individuals not carrying the latter monogenic defects, in approximately 20% of these effects of polygenes predominate, and in many individuals no molecular defects are encountered at all. These so-called FH phenocopy individuals have an elevated atherosclerotic cardiovascular disease risk in comparison with normolipidemic individuals but this risk is lower than in those with monogenic disease. Individuals with FH are exposed to elevated LDL-C levels since birth and this explains the high cardiovascular, mainly coronary heart disease, burden of these subjects. However, recent studies show that this risk is heterogenous and depends not only on high LDL-C levels but also on presence of previous cardiovascular disease, a monogenic cause, male sex, smoking, hypertension, diabetes, low HDL-cholesterol, obesity and elevated lipoprotein(a). This heterogeneity in risk can be captured by risk equations like one from the SAFEHEART cohort and by detection of subclinical coronary atherosclerosis. High dose high potency statins are the main stain for LDL-C lowering in FH, however, in most situations these medications are not powered enough to reduce cholesterol to adequate levels. Ezetimibe and PCSK9 inhibitors should also be used in order to better treat LDL-C in FH patients.
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Affiliation(s)
- Marcio H Miname
- Lipid Clinic Heart Institute (InCor), University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Raul D Santos
- Lipid Clinic Heart Institute (InCor), University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil; Hospital Israelita Albert Einstein, Sao Paulo, Brazil.
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Miname MH, Bittencourt MS, Moraes SR, Alves RI, Silva PR, Jannes CE, Pereira AC, Krieger JE, Nasir K, Santos RD. Coronary Artery Calcium and Cardiovascular Events in Patients With Familial Hypercholesterolemia Receiving Standard Lipid-Lowering Therapy. JACC Cardiovasc Imaging 2019; 12:1797-1804. [DOI: 10.1016/j.jcmg.2018.09.019] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/17/2018] [Accepted: 09/20/2018] [Indexed: 02/04/2023]
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Oliveira PVSD, Garcia-Rosa S, Sachetto ATA, Moretti AIS, Debbas V, De Bessa TC, Silva NT, Pereira ADC, Martins-de-Souza D, Santoro ML, Laurindo FRM. Protein disulfide isomerase plasma levels in healthy humans reveal proteomic signatures involved in contrasting endothelial phenotypes. Redox Biol 2019; 22:101142. [PMID: 30870787 PMCID: PMC6430080 DOI: 10.1016/j.redox.2019.101142] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 01/22/2019] [Accepted: 02/12/2019] [Indexed: 12/18/2022] Open
Abstract
Redox-related plasma proteins are candidate reporters of protein signatures associated with endothelial structure/function. Thiol-proteins from protein disulfide isomerase (PDI) family are unexplored in this context. Here, we investigate the occurrence and physiological significance of a circulating pool of PDI in healthy humans. We validated an assay for detecting PDI in plasma of healthy individuals. Our results indicate high inter-individual (median = 330 pg/mL) but low intra-individual variability over time and repeated measurements. Remarkably, plasma PDI levels could discriminate between distinct plasma proteome signatures, with PDI-rich (>median) plasma differentially expressing proteins related to cell differentiation, protein processing, housekeeping functions and others, while PDI-poor plasma differentially displayed proteins associated with coagulation, inflammatory responses and immunoactivation. Platelet function was similar among individuals with PDI-rich vs. PDI-poor plasma. Remarkably, such protein signatures closely correlated with endothelial function and phenotype, since cultured endothelial cells incubated with PDI-poor or PDI-rich plasma recapitulated gene expression and secretome patterns in line with their corresponding plasma signatures. Furthermore, such signatures translated into functional responses, with PDI-poor plasma promoting impairment of endothelial adhesion to fibronectin and a disturbed pattern of wound-associated migration and recovery area. Patients with cardiovascular events had lower PDI levels vs. healthy individuals. This is the first study describing PDI levels as reporters of specific plasma proteome signatures directly promoting contrasting endothelial phenotypes and functional responses.
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Affiliation(s)
- Percíllia Victória Santos de Oliveira
- Laboratorio de Biologia Vascular, LIM-64 (Biologia Cardiovascular Translacional), Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Sheila Garcia-Rosa
- Laboratory of Neuroproteomics, Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas, Campinas, Brazil; Instituto Nacional de Biomarcadores em Neuropsiquiatria (INBION), Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, Sao Paulo, Brazil
| | | | - Ana Iochabel Soares Moretti
- Laboratorio de Biologia Vascular, LIM-64 (Biologia Cardiovascular Translacional), Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Victor Debbas
- Laboratorio de Biologia Vascular, LIM-64 (Biologia Cardiovascular Translacional), Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Tiphany Coralie De Bessa
- Laboratorio de Biologia Vascular, LIM-64 (Biologia Cardiovascular Translacional), Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Nathalia Tenguan Silva
- Laboratorio de Biologia Vascular, LIM-64 (Biologia Cardiovascular Translacional), Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Alexandre da Costa Pereira
- Laboratory of Genetics and Molecular Cardiology, Heart Institute (InCor), University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | - Daniel Martins-de-Souza
- Laboratory of Neuroproteomics, Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas, Campinas, Brazil; Instituto Nacional de Biomarcadores em Neuropsiquiatria (INBION), Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, Sao Paulo, Brazil
| | | | - Francisco Rafael Martins Laurindo
- Laboratorio de Biologia Vascular, LIM-64 (Biologia Cardiovascular Translacional), Instituto do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.
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Lee S, Akioyamen LE, Aljenedil S, Rivière JB, Ruel I, Genest J. Genetic testing for familial hypercholesterolemia: Impact on diagnosis, treatment and cardiovascular risk. Eur J Prev Cardiol 2019; 26:1262-1270. [DOI: 10.1177/2047487319829746] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Aims Familial hypercholesterolemia (FH) is the most common genetic disorder in medicine, with a prevalence of 1/250. Affected individuals have elevated low-density lipoprotein cholesterol (LDL-C) and an increased lifetime risk of atherosclerotic cardiovascular disease (ASCVD). The diagnosis of FH is based on algorithms that include LDL-C levels, physical manifestations, family history of high LDL-C and premature ASCVD, and, more recently, genetic testing. We sought to determine the impact of genetic testing on the: 1) diagnosis of ‘definite familial hypercholesterolemia’, 2) initiation and adherence of lipid-lowering therapy and 3) risk of ASCVD. Methods We performed a systematic review and meta-analysis, pooling odds ratios and 95% confidence intervals for ASCVD from studies comparing risk estimates in individuals harboring FH-causing variants and unaffected individuals. Results After screening 3304 unique publications, 56 studies were included in the analysis. 1) Genetic testing provided confirmation of FH in 28–80%, over clinical criteria alone, depending on the diagnostic algorithm and the method of analysis. In two large population-based studies comprising 76,751 individuals, an FH-causing variant was identified in only 1.7–2.5% of subjects with an LDL-C > 4.9 mmol/L (190 mg/dL). 2) A confirmed molecular diagnosis increased lipid-lowering therapy adherence (five studies, n = 4181 definite FH). 3) Loss-of-function variant of the LDLR were at a markedly increased risk of myocardial infarction (odds ratio 6.77, 95% confidence interval 4.75–9.66), and patients with a milder (hypomorphic) pathogenic LDLR change had a 4.4-fold increase in risk (odds ratio 4.4, 95% confidence interval 2.34–8.26), compared with controls. Conclusion DNA sequencing confirms the diagnosis of FH but has a poor yield in unselected patients whose sole criterion is an elevated LDL-C. Initiation and adherence to treatment is improved. The risk of ASCVD is 4.4- to 6.8-fold increased in patients with an FH-causing variant compared with controls, depending on the severity of the DNA change.
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Affiliation(s)
- Seohyuk Lee
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, Canada
| | | | - Sumayah Aljenedil
- Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital, Riyadh, Saudi Arabia
| | - Jean-Baptiste Rivière
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, Canada
| | - Isabelle Ruel
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, Canada
| | - Jacques Genest
- Research Institute of the McGill University Health Centre, Royal Victoria Hospital, Montreal, Canada
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Pang J, Chan DC, Hu M, Muir LA, Kwok S, Charng MJ, Florkowski CM, George PM, Lin J, Loi DD, Marais AD, Nawawi HM, Gonzalez-Santos LE, Su TC, Truong TH, Santos RD, Soran H, Tomlinson B, Yamashita S, Ademi Z, Watts GF. Comparative aspects of the care of familial hypercholesterolemia in the "Ten Countries Study". J Clin Lipidol 2019; 13:287-300. [PMID: 30797720 DOI: 10.1016/j.jacl.2019.01.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/18/2018] [Accepted: 01/21/2019] [Indexed: 12/26/2022]
Abstract
BACKGROUND There is a lack of information on the health care of familial hypercholesterolemia (FH). OBJECTIVE The objective of this study was to compare the health care of FH in countries of the Asia-Pacific region and Southern Hemisphere. METHODS A series of questionnaires were completed by key opinion leaders from selected specialist centers in 12 countries concerning aspects of the care of FH, including screening, diagnosis, risk assessment, treatment, teaching/training, and research; the United Kingdom (UK) was used as the international benchmark. RESULTS The estimated percentage of patients diagnosed with the condition was low (overall <3%) in all countries, compared with ∼15% in the UK. Underdetection of FH was associated with government expenditure on health care (ϰ = 0.667, P < .05). Opportunistic and systematic screening methods, and the Dutch Lipid Clinic Network criteria were most commonly used to detect FH; genetic testing was infrequently used. Noninvasive imaging of coronary calcium and/or carotid plaques was underutilized in risk assessment. Patients with FH were generally not adequately treated, with <30% of patients achieving guideline recommended low-density lipoprotein cholesterol targets on conventional therapies. Treatment gaps included suboptimal availability and use of lipoprotein apheresis and proprotein convertase subtilsin-kexin type 9 inhibitors. A deficit of FH registries, training programs, and publications were identified in less economically developed countries. The demonstration of cost-effectiveness for cascade screening, genetic testing, and specialized treatments were significantly associated with the availability of subsidies from the health care system (ϰ = 0.571-0.800, P < .05). CONCLUSION We identified important gaps across the continuum of care for FH, particularly in less economically developed countries. Wider implementation of primary and pediatric care, telehealth services, patient support groups, education/training programs, research activities, and health technology assessments are needed to improve the care of patients with FH in these countries.
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Affiliation(s)
- Jing Pang
- School of Medicine, Faculty of Health and Medical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Dick C Chan
- School of Medicine, Faculty of Health and Medical Sciences, University of Western Australia, Perth, Western Australia, Australia
| | - Miao Hu
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, Hong Kong, SAR
| | - Lauretta A Muir
- Biochemistry and Pathology, Canterbury Health Laboratories, Lipid Clinic, Christchurch Hospital, University of Otago, Christchurch, New Zealand
| | - See Kwok
- University of Manchester, Faculty of Biology, Medicine and Health, Manchester, United Kingdom; Cardiovascular Trials Unit, Clinical Trial Management Office, Manchester Royal Infirmary, Manchester, United Kingdom
| | - Min-Ji Charng
- Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Christopher M Florkowski
- Biochemistry and Pathology, Canterbury Health Laboratories, Lipid Clinic, Christchurch Hospital, University of Otago, Christchurch, New Zealand
| | - Peter M George
- Biochemistry and Pathology, Canterbury Health Laboratories, Lipid Clinic, Christchurch Hospital, University of Otago, Christchurch, New Zealand
| | - Jie Lin
- Department of Atherosclerosis, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing, China
| | - Do Doan Loi
- Department of Cardiology, Hanoi Medical University, Hanoi, Vietnam; Vietnam National Heart Institute, Bach Mai Hospital, Hanoi, Vietnam
| | - A David Marais
- Division of Chemical Pathology, University of Cape Town Health Science Faculty, South Africa
| | - Hapizah M Nawawi
- Institute of Pathology, Laboratory and Forensic Medicine (I-PPerForM), Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh, Selangor, Malaysia
| | - Lourdes E Gonzalez-Santos
- Department of Cardiology, Section of Preventive Cardiology, UP-Philippine General Hospital, Manila, Philippines
| | - Ta-Chen Su
- Departments of Environmental and Occupational Medicine, Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Thanh Huong Truong
- Department of Cardiology, Hanoi Medical University, Hanoi, Vietnam; Vietnam National Heart Institute, Bach Mai Hospital, Hanoi, Vietnam
| | - Raul D Santos
- Lipid Clinic Heart Institute (InCor), University of São Paulo Medical School Hospital and Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Handrean Soran
- University of Manchester, Faculty of Biology, Medicine and Health, Manchester, United Kingdom; Cardiovascular Trials Unit, Clinical Trial Management Office, Manchester Royal Infirmary, Manchester, United Kingdom
| | - Brian Tomlinson
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, Hong Kong, SAR
| | - Shizuya Yamashita
- Departments of Cardiovascular Medicine and Community Medicine, Osaka University Graduate School of Medicine, Osaka, Japan; Rinku General Medical Center, Osaka, Japan
| | - Zanfina Ademi
- School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Gerald F Watts
- School of Medicine, Faculty of Health and Medical Sciences, University of Western Australia, Perth, Western Australia, Australia; Department of Cardiology, Lipid Disorders Clinic, Cardiometabolic Services, Royal Perth Hospital, Perth, Western Australia, Australia.
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Lan NSR, Martin AC, Brett T, Watts GF, Bell DA. Improving the detection of familial hypercholesterolaemia. Pathology 2018; 51:213-221. [PMID: 30579649 DOI: 10.1016/j.pathol.2018.10.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/15/2018] [Accepted: 10/15/2018] [Indexed: 02/03/2023]
Abstract
Familial hypercholesterolaemia (FH) is a dominantly inherited disorder of low-density lipoprotein (LDL) catabolism, which if untreated causes lifelong elevated LDL-cholesterol (LDL-c), accelerated atherosclerosis and premature cardiovascular disease. Recent evidence suggests the prevalence of heterozygous FH is ∼1:220, making FH the most common autosomal dominant condition. Lowering LDL-c with statin and lifestyle therapy reduces the risk of cardiovascular events. Furthermore, proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors significantly lower LDL-c in addition to statin therapy, and early outcome data suggest improved vascular outcomes with these agents in FH patients in addition to statins. However, the vast majority of people with FH still remain undiagnosed. The onus is on clinicians to identify kindreds with FH, as PCSK9 inhibitors, although expensive, are funded for patients with FH in Australia. Multiple strategies for detecting FH have been proposed. The detection of index cases can be achieved through applying electronic screening tools to general practice databases, universal screening of children during immunisation, and targeted screening of patients with premature cardiovascular disease. Advances in genomic technology have decreased costs of genetic testing, improved the understanding of the pathogenesis of FH and facilitated cascade screening. However, awareness of FH amongst clinicians and the general public still requires optimisation. This review outlines recent advances in FH detection, including emerging strategies and challenges for the next decade.
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Affiliation(s)
- Nick S R Lan
- Department of Endocrinology and Diabetes, Fiona Stanley Hospital, Murdoch, WA, Australia
| | - Andrew C Martin
- Department of General Paediatrics, Perth Children's Hospital, Nedlands, WA, Australia
| | - Tom Brett
- Department of General Practice and Primary Health Care Research, School of Medicine, The University of Notre Dame Australia, Fremantle, WA, Australia
| | - Gerald F Watts
- Faculty of Health and Medical Sciences, School of Medicine, The University of Western Australia, Crawley, WA, Australia; Department of Cardiology, Lipid Disorders Clinic, Cardiometabolic Service, Royal Perth Hospital, Perth, WA, Australia
| | - Damon A Bell
- Faculty of Health and Medical Sciences, School of Medicine, The University of Western Australia, Crawley, WA, Australia; Department of Cardiology, Lipid Disorders Clinic, Cardiometabolic Service, Royal Perth Hospital, Perth, WA, Australia; Department of Clinical Biochemistry, PathWest Laboratory Medicine, Royal Perth Hospital, Perth, WA, Australia; Department of Clinical Biochemistry, Australian Clinical Laboratories, Perth, WA, Australia.
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Pamplona-Cunha H, Campos E, de Oliveira MV, Back IC, Sincero TC, da Silva EL. Genetic polymorphisms and variants in the LDL receptor associated with familial hypercholesterolemia: cascade screening and identification of the variants 666C>A, 862G>A, 901G>A, and 919G>A of a Brazilian family. Clin Chem Lab Med 2018; 57:e23-e26. [DOI: 10.1515/cclm-2018-0307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 06/17/2018] [Indexed: 11/15/2022]
Affiliation(s)
- Heloisa Pamplona-Cunha
- Post-Graduate Program in Pharmacy, Federal University of Santa Catarina, Centro de Ciências da Saúde , Departamento de Análises Clínicas , Florianópolis, Santa Catarina , Brazil
| | - Elizandra Campos
- Graduate Course in Pharmacy, Federal University of Santa Catarina, Centro de Ciências da Saúde, Departamento de Análises Clínicas , Florianópolis, Santa Catarina , Brazil
| | - Marina V. de Oliveira
- Graduate Course in Pharmacy, Federal University of Santa Catarina, Centro de Ciências da Saúde, Departamento de Análises Clínicas , Florianópolis, Santa Catarina , Brazil
| | - Isabela C. Back
- Post-Graduate Program in Collective Health, Federal University of Santa Catarina, Centro de Ciências da Saúde, Departamento de Pediatria , Florianópolis, Santa Catarina , Brazil
| | - Thaís C.M. Sincero
- Post-Graduate Program in Pharmacy, Federal University of Santa Catarina, Centro de Ciências da Saúde , Departamento de Análises Clínicas , Florianópolis, Santa Catarina , Brazil
| | - Edson L. da Silva
- Post-Graduate Program in Pharmacy, Federal University of Santa Catarina, Centro de Ciências da Saúde , Departamento de Análises Clínicas , Bloco J/K. Rua Delfino Conti, s/n – Campus Universitário – Trindade, 88.040-370 , Florianópolis, Santa Catarina , Brazil
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Sun D, Zhou BY, Li S, Sun NL, Hua Q, Wu SL, Cao YS, Guo YL, Wu NQ, Zhu CG, Gao Y, Cui CJ, Liu G, Li JJ. Genetic basis of index patients with familial hypercholesterolemia in Chinese population: mutation spectrum and genotype-phenotype correlation. Lipids Health Dis 2018; 17:252. [PMID: 30400955 PMCID: PMC6220500 DOI: 10.1186/s12944-018-0900-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 10/24/2018] [Indexed: 11/18/2022] Open
Abstract
Background Although there have been many reports in the genetics of familial hypercholesterolemia (FH) worldwide, studies in regard of Chinese population are lacking. In this multi-center study, we aim to characterize the genetic spectrum of FH in Chinese population, and examine the genotype-phenotype correlations in detail. Methods A total of 285 unrelated index cases from China with clinical FH were consecutively recruited. Next-generation sequencing and bioinformatics tools were used for mutation detection of LDLR, APOB and PCSK9 genes and genetic analysis. Results Overall, the detection rate is 51.9% (148/285) in the unrelated index cases with a total of 119 risk variants identified including 84 in the LDLR gene, 31 in APOB and 4 in PCSK9 gene. Twenty-eight variants were found in more than one individual and LDLR c.1448G > A (p. W483X) was most frequent one detected in 9 patients. Besides, we found 8 (7 LDLR and 1 APOB) novel variants referred as “pathogenic (or likely pathogenic) variants” according to in silico analysis. In the phenotype analysis, patients with LDLR null mutation had significantly higher LDL cholesterol level than LDLR defective and APOB/PCSK9 mutation carriers and those with no mutations (p < 0.001). Furthermore, 13 double heterozygotes, 16 compound heterozygotes and 5 true LDLR homozygotes were identified and the true LDLR homozygotes had the most severe phenotypes. Conclusions The present study confirmed the heterogeneity of FH genetics in the largest Chinese cohort, which could replenish the knowledge of mutation spectrum and contribute to early screening and disease management.
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Affiliation(s)
- Di Sun
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Bing-Yang Zhou
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Sha Li
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Ning-Ling Sun
- Department of Cardiology, Peking University People's Hospital, Beijing, 100044, China
| | - Qi Hua
- Department of Cardiology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Shu-Lin Wu
- Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangzhou, 510080, China
| | - Yun-Shan Cao
- Department of Cardiology, Gansu Provincial People's Hospital, Lanzhou, 730000, Gansu, China
| | - Yuan-Lin Guo
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Na-Qiong Wu
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Cheng-Gang Zhu
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Ying Gao
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Chuan-Jue Cui
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Geng Liu
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
| | - Jian-Jun Li
- Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China.
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Pang J, David Marais A, Blom DJ, Brice BC, Silva PRS, Jannes CE, Pereira AC, Hooper AJ, Ray KK, Santos RD, Watts GF. Heterozygous familial hypercholesterolaemia in specialist centres in South Africa, Australia and Brazil: Importance of early detection and lifestyle advice. Atherosclerosis 2018; 277:470-476. [DOI: 10.1016/j.atherosclerosis.2018.06.822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/22/2018] [Accepted: 06/14/2018] [Indexed: 12/31/2022]
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Barriers to the identification of familial hypercholesterolemia among primary care providers. J Community Genet 2018; 10:229-236. [PMID: 30206796 DOI: 10.1007/s12687-018-0383-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 08/28/2018] [Indexed: 12/17/2022] Open
Abstract
Familial hypercholesterolemia (FH) is severely underdiagnosed in the USA. Primary care providers are well-positioned to identify FH cases; however, universal FH screening is not routinely implemented in practice. The aim of the present study was to identify perceived barriers to FH screening among primary care physicians in Minnesota. A questionnaire assessed FH screening practices, knowledge, and perceived barriers to FH screening. The questionnaire, sent electronically to internal and family medicine physicians in Minnesota (N = 1932) yielded a conservative estimated response rate of 9% (N = 173). Although 92% of participants reported themselves responsible for identifying individuals with FH, 30% did not routinely perform screening in practice. Only 50% of participants were able to correctly identify the risk of FH to first-degree relatives of individuals with FH. Challenges incorporating lipid and family history data was the most frequently endorsed barrier to FH screening (34%). A majority of participants endorsed a clinical decision support system that flags individuals at high risk for FH (62%) and an algorithm with cholesterol levels and lipid disorders (56%) as means of facilitating FH screening. Although the generalizability of the findings is unknown, the results underscore the need for increased provider education regarding FH and suggest an FH screening strategy incorporating a clinical decision support system, screening algorithm, and support from other healthcare providers.
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Martín-Campos JM, Plana N, Figueras R, Ibarretxe D, Caixàs A, Esteve E, Pérez A, Bueno M, Mauri M, Roig R, Martínez S, Pintó X, Masana L, Julve J, Blanco-Vaca F. Autosomal dominant hypercholesterolemia in Catalonia: Correspondence between clinical-biochemical and genetic diagnostics in 967 patients studied in a multicenter clinical setting. J Clin Lipidol 2018; 12:1452-1462. [PMID: 30293936 DOI: 10.1016/j.jacl.2018.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 08/30/2018] [Accepted: 09/04/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Autosomal dominant hypercholesterolemia (ADH) is associated with mutations in the low-density lipoprotein (LDL) receptor (LDLR), apolipoprotein B (APOB), and proprotein convertase subtilisin/kexin 9 (PCSK9) genes, and it is estimated to be greatly underdiagnosed. The most cost-effective strategy for increasing ADH diagnosis is a cascade screening from mutation-positive probands. OBJECTIVE The objective of this study was to evaluate the results from 2008 to 2016 of ADH genetic analysis performed in our clinical laboratory, serving most lipid units of Catalonia, a Spanish region with approximately 7.5 million inhabitants. METHODS After the application of the Dutch Lipid Clinic Network (DLCN) clinical diagnostic score for ADH, this information and blood or saliva from 23 different lipid clinic units were investigated in our laboratory. DNA was screened for mutations in LDLR, APOB, and PCSK9, using the DNA-array LIPOchip, the next-generation sequencing SEQPRO LIPO RS platform, and multiplex ligation-dependent probe amplification (MLPA). The Simon Broome Register Group (SBRG) criteria was calculated and analyzed for comparative purposes. RESULTS A total of 967 unrelated samples were analyzed. From this, 158 pathogenic variants were detected in 356 patients. The main components of the DLCN criteria associated with the presence of mutation were plasma LDL cholesterol (LDLc), age, and the presence of tendinous xanthomata. The contribution of family history to the diagnosis was lower than in other studies. DLCN and SBRG were similarly useful for predicting the presence of mutation. CONCLUSION In a real clinical practice, multicenter setting in Catalonia, the percentage of positive genetic diagnosis in patients potentially affected by ADH was 38.6%. The DLCN showed a relatively low capacity to predict mutation detection but a higher one for ruling out mutation.
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Affiliation(s)
- Jesús M Martín-Campos
- Institut de Recerca - Hospital de la Santa Creu i Sant Pau, Serveis de Bioquímica, i d'Endocrinologia i Nutrició, IIB Sant Pau, CIBERDEM, Universitat Autònoma de Barcelona, Departaments de Bioquímica i Biologia Molecular, i Medicina, Barcelona, Spain.
| | - Núria Plana
- Hospital Universitari Sant Joan, Universitat Rovira i Virgili, Unitat de Medicina Vascular i Metabolisme, Unitat de Recerca en Lípids i Arteriosclerosi, IISPV, CIBERDEM, Reus, Spain
| | - Rosaura Figueras
- Hospital Universitari de Bellvitge, Servei de Medicina Interna, Unitat de Lípids i Risc Vascular, Universitat de Barcelona, IDIBELL, CIBEROBN, FIPEC, ABS 17 de Setembre, L'Hospitalet/El Prat de Llobregat, Spain
| | - Daiana Ibarretxe
- Hospital Universitari Sant Joan, Universitat Rovira i Virgili, Unitat de Medicina Vascular i Metabolisme, Unitat de Recerca en Lípids i Arteriosclerosi, IISPV, CIBERDEM, Reus, Spain
| | - Assumpta Caixàs
- Hospital Universitari Parc Taulí, Servei d'Endocrinologia i Nutrició, Institut Investigació i Innovació Parc Taulí I3PT-Universitat Autònoma de Barcelona, Sabadell, Spain
| | - Eduardo Esteve
- Hospital Universitari de Girona Dr Josep Trueta, Servei d'Endocrinologia i Nutrició, CIBEROBN, Girona, Spain
| | - Antonio Pérez
- Institut de Recerca - Hospital de la Santa Creu i Sant Pau, Serveis de Bioquímica, i d'Endocrinologia i Nutrició, IIB Sant Pau, CIBERDEM, Universitat Autònoma de Barcelona, Departaments de Bioquímica i Biologia Molecular, i Medicina, Barcelona, Spain
| | - Marta Bueno
- Hospital Universitari Arnau de Vilanova, Servei d'Endocrinologia i Nutrició, Lleida, Spain
| | - Marta Mauri
- Hospital de Terrassa, Servei de Medicina Interna, Terrassa, Spain
| | - Rosa Roig
- Institut de Recerca - Hospital de la Santa Creu i Sant Pau, Serveis de Bioquímica, i d'Endocrinologia i Nutrició, IIB Sant Pau, CIBERDEM, Universitat Autònoma de Barcelona, Departaments de Bioquímica i Biologia Molecular, i Medicina, Barcelona, Spain
| | - Susana Martínez
- Institut de Recerca - Hospital de la Santa Creu i Sant Pau, Serveis de Bioquímica, i d'Endocrinologia i Nutrició, IIB Sant Pau, CIBERDEM, Universitat Autònoma de Barcelona, Departaments de Bioquímica i Biologia Molecular, i Medicina, Barcelona, Spain
| | - Xavier Pintó
- Hospital Universitari de Bellvitge, Servei de Medicina Interna, Unitat de Lípids i Risc Vascular, Universitat de Barcelona, IDIBELL, CIBEROBN, FIPEC, ABS 17 de Setembre, L'Hospitalet/El Prat de Llobregat, Spain
| | - Luís Masana
- Hospital Universitari Sant Joan, Universitat Rovira i Virgili, Unitat de Medicina Vascular i Metabolisme, Unitat de Recerca en Lípids i Arteriosclerosi, IISPV, CIBERDEM, Reus, Spain
| | - Josep Julve
- Institut de Recerca - Hospital de la Santa Creu i Sant Pau, Serveis de Bioquímica, i d'Endocrinologia i Nutrició, IIB Sant Pau, CIBERDEM, Universitat Autònoma de Barcelona, Departaments de Bioquímica i Biologia Molecular, i Medicina, Barcelona, Spain
| | - Francisco Blanco-Vaca
- Institut de Recerca - Hospital de la Santa Creu i Sant Pau, Serveis de Bioquímica, i d'Endocrinologia i Nutrició, IIB Sant Pau, CIBERDEM, Universitat Autònoma de Barcelona, Departaments de Bioquímica i Biologia Molecular, i Medicina, Barcelona, Spain.
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Silva PRDS, Jannes CE, Oliveira TGM, Gómez LMG, Krieger JE, Santos RD, Pereira AC. Predictors of Family Enrollment in a Genetic Cascade Screening Program for Familial Hypercholesterolemia. Arq Bras Cardiol 2018; 111:578-584. [PMID: 30156605 PMCID: PMC6199512 DOI: 10.5935/abc.20180156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 04/25/2018] [Indexed: 12/02/2022] Open
Abstract
Background Genetic cascade screening is the most cost-effective method for the
identification of individuals with familial hypercholesterolemia (FH), but
the best strategies for the enrollment of at-risk individuals in a FH
screening program are not fully known. Objective The aim of this study is to identify the best predictors of familial
enrollment into genetic screening, using features derived from tested
probands. Methods One hundred and eighty-three index-cases (ICs) with a positive genetic result
that had relatives screened from 01/2011 to 07/2015 were included. The
response variable was the number of relatives for each enrolled IC. All
variables in the study were based on ICs’ derived clinical and
socioeconomical features. The effect size of predictor variables were
obtained through a general linear model using a negative binomial regression
link function. Significance was considered with a p < 0.05. Results Mean IC age when enrolling into the program was 50 years old; 78.1% of
individuals reported knowledge of relatives with dyslipidemia. Mean baseline
LDL-cholesterol level was 316 ± 90 mg/dL. Referral origin through the
cascade program website vs. tertiary care, IC LDL-cholesterol and familial
history of high LDL-cholesterol levels were independent predictors
associated with a higher number of enrolled relatives. Conclusions Our data suggest that FH cascade screening programs can predict family
enrollment based on IC features. This information may be useful for devising
better and more effective screening approaches for at-risk individuals.
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Affiliation(s)
- Pãmela Rodrigues de Souza Silva
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brazil
| | - Cinthia Elim Jannes
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brazil
| | - Theo G M Oliveira
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brazil
| | - Luz Marina Gómez Gómez
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brazil
| | - José E Krieger
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brazil
| | - Raul D Santos
- Clínica de Lípides do Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brazil
| | - Alexandre Costa Pereira
- Laboratório de Genética e Cardiologia Molecular do Instituto do Coração (InCor) da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brazil
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Abstract
PURPOSE OF REVIEW DNA copy number variations (CNVs) are quantitative structural rearrangements that include deletions, duplications, and higher order amplifications. Because of technical limitations, the contribution of this common form of genetic variation to regulation of lipid metabolism and dyslipidemia has been underestimated. RECENT FINDINGS Recent literature involving CNVs and dyslipidemias has focused mainly on rare CNVs causing familial hypercholesterolemia, and a common CNV polymorphism as the major determinant of lipoprotein(a) plasma concentrations. Additionally, there is tantalizing evidence of largely uninvestigated but plausible presence of CNVs underlying other dyslipidemias. We also discuss the future role of improved technologies in facilitating more economic, routine CNV assessment in dyslipidemias. SUMMARY CNVs account for large proportion of human genetic variation and are already known to contribute to susceptibility of dyslipidemias, particularly in about 10% of familial hypercholesterolemia patients. Increasing availability of clinical next-generation sequencing and bioinformatics presents a cost-effective opportunity for novel CNV discoveries in dyslipidemias.
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