1
|
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.
Collapse
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
| |
Collapse
|
2
|
Campbell-Salome G, Jones LK, Walters NL, Morgan KM, Brangan A, Ladd IG, McGowan MP, Wilemon K, Schmidlen TJ, Simmons E, Schwartz MLB, McMinn MN, Tricou E, Rahm AK, Ahmed CD, Sturm AC. Optimizing communication strategies and designing a comprehensive program to facilitate cascade testing for familial hypercholesterolemia. BMC Health Serv Res 2023; 23:340. [PMID: 37020233 PMCID: PMC10074725 DOI: 10.1186/s12913-023-09304-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 03/17/2023] [Indexed: 04/07/2023] Open
Abstract
BACKGROUND This project aimed to optimize communication strategies to support family communication about familial hypercholesterolemia (FH) and improve cascade testing uptake among at-risk relatives. Individuals and families with FH provided feedback on multiple strategies including: a family letter, digital tools, and direct contact. METHODS Feedback from participants was collected via dyadic interviews (n = 11) and surveys (n = 98) on communication strategies and their proposed implementation to improve cascade testing uptake. We conducted a thematic analysis to identify how to optimize each strategy. We categorized optimizations and their implementation within the project's healthcare system using a Traffic Light approach. RESULTS Thematic analysis resulted in four distinct suggested optimizations for each communication strategy and seven suggested optimizations that were suitable across all strategies. Four suggestions for developing a comprehensive cascade testing program, which would offer all optimized communication strategies also emerged. All optimized suggestions coded green (n = 21) were incorporated. Suggestions coded yellow (n = 12) were partially incorporated. Only two suggestions were coded red and could not be incorporated. CONCLUSIONS This project demonstrates how to collect and analyze stakeholder feedback for program design. We identified feasible suggested optimizations, resulting in communication strategies that are patient-informed and patient-centered. Optimized strategies were implemented in a comprehensive cascade testing program.
Collapse
Affiliation(s)
- Gemme Campbell-Salome
- Department of Genomic Health, Geisinger, , Danville, PA, USA.
- Department of Population Health Sciences, Geisinger, Danville, PA, USA.
| | - Laney K Jones
- Department of Genomic Health, Geisinger, , Danville, PA, USA
- Geisinger Heart and Vascular Institute, Geisinger, Danville, PA, USA
| | | | - Kelly M Morgan
- Department of Genomic Health, Geisinger, , Danville, PA, USA
| | - Andrew Brangan
- Department of Genomic Health, Geisinger, , Danville, PA, USA
| | - Ilene G Ladd
- Department of Genomic Health, Geisinger, , Danville, PA, USA
| | - Mary P McGowan
- The Family Heart Foundation, Pasadena, CA, USA
- Geisel School of Medicine at Dartmouth, Dartmouth Hitchcock Medical Center, Lebanon, NH, USA
| | | | | | | | - Marci L B Schwartz
- Cardiac Genome Clinic, Ted Rogers Centre for Heart Research, The Hospital for Sick Children, Toronto, ON, Canada
| | - Megan N McMinn
- Department of Genomic Health, Geisinger, , Danville, PA, USA
| | - Eric Tricou
- Department of Genomic Health, Geisinger, , Danville, PA, USA
| | - Alanna K Rahm
- Department of Genomic Health, Geisinger, , Danville, PA, USA
| | | | - Amy C Sturm
- Department of Genomic Health, Geisinger, , Danville, PA, USA
- Geisinger Heart and Vascular Institute, Geisinger, Danville, PA, USA
| |
Collapse
|
3
|
Frey MK, Ahsan MD, Bergeron H, Lin J, Li X, Fowlkes RK, Narayan P, Nitecki R, Rauh-Hain JA, Moss HA, Baltich Nelson B, Thomas C, Christos PJ, Hamilton JG, Chapman-Davis E, Cantillo E, Holcomb K, Kurian AW, Lipkin S, Offit K, Sharaf RN. Cascade Testing for Hereditary Cancer Syndromes: Should We Move Toward Direct Relative Contact? A Systematic Review and Meta-Analysis. J Clin Oncol 2022; 40:4129-4143. [PMID: 35960887 PMCID: PMC9746789 DOI: 10.1200/jco.22.00303] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
PURPOSE Evidence-based guidelines recommend cascade genetic counseling and testing for hereditary cancer syndromes, providing relatives the opportunity for early detection and prevention of cancer. The current standard is for patients to contact and encourage relatives (patient-mediated contact) to undergo counseling and testing. Direct relative contact by the medical team or testing laboratory has shown promise but is complicated by privacy laws and lack of infrastructure. We sought to compare outcomes associated with patient-mediated and direct relative contact for hereditary cancer cascade genetic counseling and testing in the first meta-analysis on this topic. MATERIALS AND METHODS We conducted a systematic review and meta-analysis in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines (PROSPERO No.: CRD42020134276). We searched key electronic databases to identify studies evaluating hereditary cancer cascade testing. Eligible trials were subjected to meta-analysis. RESULTS Eighty-seven studies met inclusion criteria. Among relatives included in the meta-analysis, 48% (95% CI, 38 to 58) underwent cascade genetic counseling and 41% (95% CI, 34 to 48) cascade genetic testing. Compared with the patient-mediated approach, direct relative contact resulted in significantly higher uptake of genetic counseling for all relatives (63% [95% CI, 49 to 75] v 35% [95% CI, 24 to 48]) and genetic testing for first-degree relatives (62% [95% CI, 49 to 73] v 40% [95% CI, 32 to 48]). Methods of direct contact included telephone calls, letters, and e-mails; respective rates of genetic testing completion were 61% (95% CI, 51 to 70), 48% (95% CI, 37 to 59), and 48% (95% CI, 45 to 50). CONCLUSION Most relatives at risk for hereditary cancer do not undergo cascade genetic counseling and testing, forgoing potentially life-saving medical interventions. Compared with patient-mediated contact, direct relative contact increased rates of cascade genetic counseling and testing, arguing for a shift in the care delivery paradigm, to be confirmed by randomized controlled trials.
Collapse
Affiliation(s)
| | | | | | - Jenny Lin
- Weill Cornell Medicine, New York, NY
| | - Xuan Li
- Weill Cornell Medicine, New York, NY
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Kenneth Offit
- Memorial Sloan Kettering Cancer Center, New York, NY
| | | |
Collapse
|
4
|
Miller AA, Bangash H, Smith CY, Wood-Wentz CM, Bailey KR, Kullo IJ. A pragmatic clinical trial of cascade testing for familial hypercholesterolemia. Genet Med 2022; 24:2535-2543. [PMID: 36173399 PMCID: PMC9944844 DOI: 10.1016/j.gim.2022.08.026] [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: 07/01/2022] [Revised: 08/25/2022] [Accepted: 08/25/2022] [Indexed: 01/29/2023] Open
Abstract
PURPOSE We compared new cases detected per index case in familial hypercholesterolemia (FH) families with or without an identifiable monogenic etiology. METHODS We enrolled 52 FH probands with a pathogenic variant (FHg+) in LDLR, APOB, or PCSK9 and 73 probands without such a variant (FHg-). After direct contact by the study team, family members (FMs) of FHg+ probands could opt-in for genetic testing and FMs of FHg- probands were asked to provide a lipid profile. New cases were defined as presence of a pathogenic variant in FHg+ families and as low-density lipoprotein cholesterol ≥155 mg/dL in FHg- families. RESULTS Of 71 FHg+ probands seen by a genetic counselor, 52 consented and identified 253 FMs (111 consented and were tested, yielding 48 new cases). Of 101 FHg- probands who received counseling, 73 consented and identified 295 FMs (63 consented and were tested, yielding 17 new cases). New case detection per index case was significantly greater in FHg+ than in FHg- families (0.92 vs 0.23), a result of higher cascade testing uptake (43.9 vs 21.4%) and yield (43.2 vs 27.0%) in the former. CONCLUSION New case detection rate was significantly higher in FH families with a monogenic etiology than in those without such an etiology owing to greater uptake and yield of cascade testing.
Collapse
Affiliation(s)
| | - Hana Bangash
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN
| | - Carin Y Smith
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN
| | | | - Kent R Bailey
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN
| | - Iftikhar J Kullo
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN.
| |
Collapse
|
5
|
Blasi PR, Scrol A, Anderson ML, Gray MF, Tiffany B, Fullerton SM, Ralston JD, Leppig KA, Henrikson NB. Feasibility, acceptability, and limited efficacy of health system-led familial risk notification: protocol for a mixed-methods evaluation. Pilot Feasibility Stud 2022; 8:174. [PMID: 35945632 PMCID: PMC9361690 DOI: 10.1186/s40814-022-01142-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 07/29/2022] [Indexed: 11/24/2022] Open
Abstract
Background Genetic testing for pathogenic variants associated with hereditary breast and ovarian cancer risk can improve cancer outcomes through enhanced preventive care in both people with known variants and their biologic relatives. Cascade screening—the process of case-finding in relatives by notifying and inviting them to consider testing—currently relies on the patient to notify their own at-risk relatives. However, many of these relatives never learn they might be at risk. We developed and implemented a new health system-led familial genetic risk notification process where the care team offers to contact at-risk relatives directly. This protocol describes a study to assess the feasibility, acceptability, and limited efficacy of this intervention. Methods This feasibility study will use a single-arm, nonrandomized, mixed-methods prospective design. We will enroll two groups of participants: probands and relatives of probands. Eligible probands are currently enrolled Kaiser Permanente Washington (KPWA) members with an upcoming appointment for pre-test genetic counseling for hereditary Lynch syndrome, breast, or ovarian cancer. Eligible relatives, who do not have to be KPWA members, are first-and second-degree relatives of probands. During the appointment with the proband, the genetic counselor will determine whether the proband is appropriate for genetic testing and if so, which relatives might benefit from cascade testing. The genetic counselor then will offer to contact any or all identified relatives directly to discuss genetic risk and testing. The primary outcome of this study is the feasibility of the implemented familial notification process, which we will measure using quantitative and qualitative data on intervention reach, intervention acceptability, and limited efficacy. Analyses will be primarily descriptive and exploratory, with the intent of preparing for a future, larger trial of direct contact interventions. Discussion Our findings will provide new, foundational evidence for the creation of US-based familial notification systems that directly address logistical and ethical challenges while prioritizing the preferences of patients and families. Supplementary Information The online version contains supplementary material available at 10.1186/s40814-022-01142-9.
Collapse
Affiliation(s)
- Paula R Blasi
- Kaiser Permanente Washington Health Research Institute, 1730 Minor Avenue, Suite 1600, Seattle, WA, 98101, USA
| | - Aaron Scrol
- Kaiser Permanente Washington Health Research Institute, 1730 Minor Avenue, Suite 1600, Seattle, WA, 98101, USA
| | - Melissa L Anderson
- Kaiser Permanente Washington Health Research Institute, 1730 Minor Avenue, Suite 1600, Seattle, WA, 98101, USA
| | - Marlaine Figueroa Gray
- Kaiser Permanente Washington Health Research Institute, 1730 Minor Avenue, Suite 1600, Seattle, WA, 98101, USA
| | - Brooks Tiffany
- Kaiser Permanente Washington Health Research Institute, 1730 Minor Avenue, Suite 1600, Seattle, WA, 98101, USA
| | - Stephanie M Fullerton
- Department of Bioethics and Humanities, School of Medicine, University of Washington, Seattle, WA, USA
| | - James D Ralston
- Kaiser Permanente Washington Health Research Institute, 1730 Minor Avenue, Suite 1600, Seattle, WA, 98101, USA
| | | | - Nora B Henrikson
- Kaiser Permanente Washington Health Research Institute, 1730 Minor Avenue, Suite 1600, Seattle, WA, 98101, USA.
| |
Collapse
|
6
|
Schmidlen TJ, Bristow SL, Hatchell KE, Esplin ED, Nussbaum RL, Haverfield EV. The Impact of Proband Indication for Genetic Testing on the Uptake of Cascade Testing Among Relatives. Front Genet 2022; 13:867226. [PMID: 35783293 PMCID: PMC9243226 DOI: 10.3389/fgene.2022.867226] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 05/18/2022] [Indexed: 11/17/2022] Open
Abstract
Although multiple factors can influence the uptake of cascade genetic testing, the impact of proband indication has not been studied. We performed a retrospective, cross-sectional study comparing cascade genetic testing rates among relatives of probands who received either diagnostic germline testing or non-indication-based proactive screening via next-generation sequencing (NGS)-based multigene panels for hereditary cancer syndromes (HCS) and/or familial hypercholesterolemia (FH). The proportion of probands with a medically actionable (positive) finding were calculated based on genes associated with Centers for Disease Control and Prevention (CDC) Tier 1 conditions, HCS genes, and FH genes. Among probands with a positive finding, cascade testing rates and influencing factors were assessed. A total of 270,715 probands were eligible for inclusion in the study (diagnostic n = 254,281,93.9%; proactive n = 16,434, 6.1%). A positive result in a gene associated with a CDC Tier 1 condition was identified in 10,520 diagnostic probands (4.1%) and 337 proactive probands (2.1%), leading to cascade testing among families of 3,305 diagnostic probands (31.4%) and 36 proactive probands (10.7%) (p < 0.0001). A positive result in an HCS gene was returned to 23,272 diagnostic probands (9.4%) and 970 proactive probands (6.1%), leading to cascade testing among families of 6,611 diagnostic probands (28.4%) and 89 proactive probands (9.2%) (p < 0.0001). Cascade testing due to a positive result in an HCS gene was more commonly pursued when the diagnostic proband was White, had a finding in a gene associated with a CDC Tier 1 condition, or had a personal history of cancer, or when the proactive proband was female. A positive result in an FH gene was returned to 1,647 diagnostic probands (25.3%) and 67 proactive probands (0.62%), leading to cascade testing among families of 360 diagnostic probands (21.9%) and 4 proactive probands (6.0%) (p < 0.01). Consistently higher rates of cascade testing among families of diagnostic probands may be due to a perceived urgency because of personal or family history of disease. Due to the proven clinical benefit of cascade testing, further research on obstacles to systematic implementation and uptake of testing for relatives of any proband with a medically actionable variant is warranted.
Collapse
|
7
|
Schmidlen T, Jones CL, Campbell-Salome G, McCormick CZ, Vanenkevort E, Sturm AC. Use of a chatbot to increase uptake of cascade genetic testing. J Genet Couns 2022; 31:1219-1230. [PMID: 35616645 DOI: 10.1002/jgc4.1592] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 04/26/2022] [Accepted: 05/06/2022] [Indexed: 12/18/2022]
Abstract
Successful proband-mediated family communication and subsequent cascade genetic testing uptake requires interventions that present information clearly, in sufficient detail, and with medical authority. To facilitate family communication for patients receiving clinically actionable results via the MyCode® Community Health Initiative, a Family Sharing Tool (FST) and a cascade chatbot were developed. FST is an electronic mechanism allowing patients to share genetic test results with relatives via chatbot. The cascade chatbot describes the proband's result, associated disease risks, and recommended management and captures whether the user is a blood relative or caregiver, sex, and relationship to the proband. FST and cascade chatbot uptake among MyCode® probands and relatives was tracked from August 2018 through February 2020. Cascade genetic testing uptake was collected from testing laboratories as number of cascades per proband. Fifty-eight percent (316/543) of probands consented to FST; 42% (227/543) declined. Receipt preferences were patient electronic health record (EHR) portal (52%), email (29%), and text (19%). Patient EHR portal users (p < 0.001) and younger patients were more likely to consent (p < 0.001). FST was deployed to 308 probands. Fifty-nine percent (183/308) opened; of those, 56% (102/183) used FST to send a cascade chatbot to relatives. These 102 probands shared a cascade chatbot with 377 relatives. Sixty-two percent (235/377) of relatives opened; of these, 69% (161/235) started, and of these, 57% (92/161) completed the cascade chatbot. Cascade genetic testing uptake was significantly greater among relatives of probands who consented to the FST (M = 2.34 cascades, SD = 2.10) than relatives of probands who declined (M = 1.40 cascades, SD = 0.82, p < 0.001). Proband age was not a significant predictor of cascade genetic testing uptake. Further work is needed to better understand factors impacting proband use of FST and relative use of cascade chatbots.
Collapse
Affiliation(s)
| | - Claire L Jones
- Geisinger, Genomic Medicine Institute, Danville, Pennsylvania, USA
| | | | - Cara Z McCormick
- Geisinger, Genomic Medicine Institute, Danville, Pennsylvania, USA
| | - Erin Vanenkevort
- Geisinger, Genomic Medicine Institute, Danville, Pennsylvania, USA
| | - Amy C Sturm
- Geisinger, Genomic Medicine Institute, Danville, Pennsylvania, USA
| |
Collapse
|
8
|
Campbell-Salome G, Walters NL, Ladd IG, Sheldon A, Ahmed CD, Brangan A, McMinn MN, Rahm AK, Schwartz MLB, Tricou E, Fisher CL, Sturm AC. Motivating cascade testing for familial hypercholesterolemia: applying the extended parallel process model for clinician communication. Transl Behav Med 2022; 12:800-809. [PMID: 35429393 PMCID: PMC9291357 DOI: 10.1093/tbm/ibac018] [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] [Indexed: 11/26/2022] Open
Abstract
Motivating at-risk relatives to undergo cascade testing for familial hypercholesterolemia (FH) is critical for diagnosis and lifesaving treatment. As credible sources of information, clinicians can assist in family communication about FH and motivate cascade testing uptake. However, there are no guidelines regarding how clinicians should effectively communicate with probands (the first person diagnosed in the family) and at-risk relatives. Individuals and families with FH can inform our understanding of the most effective communications to promote cascade testing. Guided by the extended parallel process model (EPPM), we analyzed the perspectives of individuals and families with FH for effective messaging clinicians can use to promote cascade testing uptake. We analyzed narrative data from interviews and surveys collected as part of a larger mixed-methods study. The EPPM was used to identify message features recommended by individuals and families with FH that focus on four key constructs (severity, susceptibility, response efficacy, self-efficacy) to promote cascade testing. Participants included 22 individuals from 11 dyadic interviews and 98 survey respondents. Participants described prioritizing multiple messages that address each EPPM construct to alert relatives about their risk. They illustrated strategies clinicians could use within each EPPM construct to communicate to at-risk relatives about the importance of pursuing diagnosis via cascade testing and subsequent treatment for high cholesterol due to FH. Findings provide guidance on effective messaging to motivate cascade testing uptake for FH and demonstrates how the EPPM may guide communication with at-risk relatives about genetic risk and motivate cascade testing broadly.
Collapse
Affiliation(s)
- Gemme Campbell-Salome
- Genomic Medicine Institute, Geisinger, Danville, PA, USA
- College of Journalism and Communications, University of Florida, Gainesville, FL, USA
| | | | - Ilene G Ladd
- Genomic Medicine Institute, Geisinger, Danville, PA, USA
| | | | | | - Andrew Brangan
- Genomic Medicine Institute, Geisinger, Danville, PA, USA
| | - Megan N McMinn
- Genomic Medicine Institute, Geisinger, Danville, PA, USA
| | - Alanna K Rahm
- Genomic Medicine Institute, Geisinger, Danville, PA, USA
| | | | - Eric Tricou
- Genomic Medicine Institute, Geisinger, Danville, PA, USA
| | - Carla L Fisher
- College of Journalism and Communications, University of Florida, Gainesville, FL, USA
| | - Amy C Sturm
- Genomic Medicine Institute, Geisinger, Danville, PA, USA
- Heart Institute, Geisinger, Danville, PA, USA
| |
Collapse
|
9
|
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.
Collapse
|
10
|
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.
Collapse
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
| |
Collapse
|
11
|
Patient and Family Preferences on Health System-Led Direct Contact for Cascade Screening. J Pers Med 2021; 11:jpm11060538. [PMID: 34200550 PMCID: PMC8230217 DOI: 10.3390/jpm11060538] [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: 04/30/2021] [Revised: 06/03/2021] [Accepted: 06/07/2021] [Indexed: 12/16/2022] Open
Abstract
Health benefits to relatives of people at known genetic risk for hereditary cancer syndromes is key to realizing the promise of precision medicine. We conducted a qualitative study to design a patient- and family-centered program for direct contact of relatives to recommend cascade genetic testing. We conducted two rounds of data collection using focus groups followed by individual interviews with patients with HBOC or Lynch syndrome and a separate sample of people with a family history of hereditary cancers. Results indicate that U.S.-based health system-led direct contact of relatives is acceptable to patients and families, should take a programmatic approach, include consent of relatives before proband testing, complement to existing patient-mediated disclosure, and allow for relative control of information. Our findings suggest a set of requirements for U.S.-based direct contact programs that could ultimately benefit more relatives than current approaches.
Collapse
|
12
|
Miller DM, Gaviglio A, Zierhut HA. Development of an Implementation Framework for Overcoming Underdiagnoses of Familial Hypercholesterolemia in the USA. Public Health Genomics 2021; 24:110-122. [PMID: 33853081 DOI: 10.1159/000513872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 12/16/2020] [Indexed: 11/19/2022] Open
Abstract
Familial hypercholesterolemia (FH) is a genetic condition which causes elevated low-density lipoprotein cholesterol from birth. With a prevalence of 1 in 250 and the availability of effective treatments, the diagnostic rate of <1 to 10% is unacceptably low. Screening for FH is supported by multiple organizations, but it has not been broadly adopted and implemented across the USA. To investigate the implementation of FH screening, key informants were recruited from across the USA for their expertise in FH-related literature, guidelines, public health, and/or advocacy to complete -semistructured interviews guided by implementation science (RE-AIM framework). Sixteen semistructured interviews were analyzed with directed content and thematic analyses, yielding specific barriers and recommendations to improve FH screening. Barriers to FH screening included patient recruitment and participation, equitable access to healthcare, provider discomfort with screening and treating FH, provider burden, lack of public health and legislative support, FH awareness, guideline complexity, facilitation of genetic testing and cascade screening, and lack of coordination between stakeholders. Awareness, engagement, communication, and collaboration between stakeholders is integral to successful FH screening. Individualized plans will be required at national, regional, and institutional levels. FH screening implementation can be achieved through practice facilitation, streamlined screening approaches, electric medical record tools, and consensus guidelines to increase screening adoption and consistent delivery. Reliable funding and established lines of communication between stakeholders can maintain efforts as FH screening progresses.
Collapse
Affiliation(s)
- Dana M Miller
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, Minnesota, USA
| | - Amy Gaviglio
- G2S Corporation/CDC Newborn Screening and Molecular Biology Branch, Atlanta, Georgia, USA
| | - Heather A Zierhut
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, Minnesota, USA
| |
Collapse
|
13
|
Campbell-Salome G, Jones LK, Masnick MF, Walton NA, Ahmed CD, Buchanan AH, Brangan A, Esplin ED, Kann DG, Ladd IG, Kelly MA, Kindt I, Kirchner HL, McGowan MP, McMinn MN, Morales A, Myers KD, Oetjens MT, Rahm AK, Schmidlen TJ, Sheldon A, Simmons E, Snir M, Strande NT, Walters NL, Wilemon K, Williams MS, Gidding SS, Sturm AC. Developing and Optimizing Innovative Tools to Address Familial Hypercholesterolemia Underdiagnosis: Identification Methods, Patient Activation, and Cascade Testing for Familial Hypercholesterolemia. CIRCULATION-GENOMIC AND PRECISION MEDICINE 2021; 14:e003120. [PMID: 33480803 PMCID: PMC7892261 DOI: 10.1161/circgen.120.003120] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Background: Familial hypercholesterolemia (FH) is the most common cardiovascular genetic disorder and, if left untreated, is associated with increased risk of premature atherosclerotic cardiovascular disease, the leading cause of preventable death in the United States. Although FH is common, fatal, and treatable, it is underdiagnosed and undertreated due to a lack of systematic methods to identify individuals with FH and limited uptake of cascade testing. Methods and Results: This mixed-method, multi-stage study will optimize, test, and implement innovative approaches for both FH identification and cascade testing in 3 aims. To improve identification of individuals with FH, in Aim 1, we will compare and refine automated phenotype-based and genomic approaches to identify individuals likely to have FH. To improve cascade testing uptake for at-risk individuals, in Aim 2, we will use a patient-centered design thinking process to optimize and develop novel, active family communication methods. Using a prospective, observational pragmatic trial, we will assess uptake and effectiveness of each family communication method on cascade testing. Guided by an implementation science framework, in Aim 3, we will develop a comprehensive guide to identify individuals with FH. Using the Conceptual Model for Implementation Research, we will evaluate implementation outcomes including feasibility, acceptability, and perceived sustainability as well as health outcomes related to the optimized methods and tools developed in Aims 1 and 2. Conclusions: Data generated from this study will address barriers and gaps in care related to underdiagnosis of FH by developing and optimizing tools to improve FH identification and cascade testing.
Collapse
Affiliation(s)
- Gemme Campbell-Salome
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Laney K Jones
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Max F Masnick
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Nephi A Walton
- Intermountain Precision Genomics, Intermountain Healthcare, St. George, UT (N.A.W.)
| | - Catherine D Ahmed
- The Familial Hypercholesterolemia Foundation, Pasadena, CA (C.D.A., M.P.M., K.D.M., A.S., K.W.)
| | - Adam H Buchanan
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Andrew Brangan
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | | | - David G Kann
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Ilene G Ladd
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Melissa A Kelly
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | | | - H Lester Kirchner
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Mary P McGowan
- The Familial Hypercholesterolemia Foundation, Pasadena, CA (C.D.A., M.P.M., K.D.M., A.S., K.W.).,Geisel School of Medicine at Dartmouth, Dartmouth Hitchcock Medical Center, Lebanon, NH (M.P.M.)
| | - Megan N McMinn
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Ana Morales
- Invitae, San Francisco, CA (E.D.E., A.M., E.S., M.S.)
| | - Kelly D Myers
- The Familial Hypercholesterolemia Foundation, Pasadena, CA (C.D.A., M.P.M., K.D.M., A.S., K.W.)
| | - Matthew T Oetjens
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Alanna Kulchak Rahm
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Tara J Schmidlen
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Amanda Sheldon
- The Familial Hypercholesterolemia Foundation, Pasadena, CA (C.D.A., M.P.M., K.D.M., A.S., K.W.)
| | | | - Moran Snir
- Invitae, San Francisco, CA (E.D.E., A.M., E.S., M.S.)
| | - Natasha T Strande
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Nicole L Walters
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Katherine Wilemon
- The Familial Hypercholesterolemia Foundation, Pasadena, CA (C.D.A., M.P.M., K.D.M., A.S., K.W.)
| | - Marc S Williams
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Samuel S Gidding
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| | - Amy C Sturm
- Geisinger, Danville, PA (G.C.-S., L.K.J., M.F.M., A.H.B., A.B., D.G.K., I.G.L., M.A.K., H.L.K., M.N.M., M.T.O., A.K.R., T.J.S., N.T.S., N.L.W., M.S.W., S.S.G., A.C.S.)
| |
Collapse
|
14
|
Kamar A, Khalil A, Nemer G. The Digenic Causality in Familial Hypercholesterolemia: Revising the Genotype-Phenotype Correlations of the Disease. Front Genet 2021; 11:572045. [PMID: 33519890 PMCID: PMC7844333 DOI: 10.3389/fgene.2020.572045] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 12/01/2020] [Indexed: 12/20/2022] Open
Abstract
Genetically inherited defects in lipoprotein metabolism affect more than 10 million individuals around the globe with preponderance in some parts where consanguinity played a major role in establishing founder mutations. Mutations in four genes have been so far linked to the dominant and recessive form of the disease. Those players encode major proteins implicated in cholesterol regulation, namely, the low-density lipoprotein receptor (LDLR) and its associate protein 1 (LDLRAP1), the proprotein convertase substilin/kexin type 9 (PCSK9), and the apolipoprotein B (APOB). Single mutations or compound mutations in one of these genes are enough to account for a spectrum of mild to severe phenotypes. However, recently several reports have identified digenic mutations in familial cases that do not necessarily reflect a much severe phenotype. Yet, data in the literature supporting this notion are still lacking. Herein, we review all the reported cases of digenic mutations focusing on the biological impact of gene dosage and the potential protective effects of single-nucleotide polymorphisms linked to hypolipidemia. We also highlight the difficulty of establishing phenotype-genotype correlations in digenic familial hypercholesterolemia cases due to the complexity and heterogeneity of the phenotypes and the still faulty in silico pathogenicity scoring system. We finally emphasize the importance of having a whole exome/genome sequencing approach for all familial cases of familial hyperlipidemia to better understand the genetic and clinical course of the disease.
Collapse
Affiliation(s)
- Amina Kamar
- Department of Biology, American University of Beirut, Beirut, Lebanon
| | - Athar Khalil
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
| | - Georges Nemer
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
- Division of Genomics and Translational Biomedicine, College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar
| |
Collapse
|
15
|
Schwiter R, Brown E, Murray B, Kindt I, Van Enkevort E, Pollin TI, Sturm AC. Perspectives from individuals with familial hypercholesterolemia on direct contact in cascade screening. J Genet Couns 2020; 29:1142-1150. [DOI: 10.1002/jgc4.1266] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/23/2020] [Accepted: 02/25/2020] [Indexed: 01/02/2023]
Affiliation(s)
| | - Emily Brown
- Division of Cardiology School of Medicine Johns Hopkins University Baltimore MD USA
| | - Brittney Murray
- Division of Cardiology School of Medicine Johns Hopkins University Baltimore MD USA
| | | | | | - Toni I. Pollin
- School of Medicine University of Maryland Baltimore Baltimore MD USA
| | - Amy C. Sturm
- Genomic Medicine Institute Geisinger Danville PA USA
| |
Collapse
|
16
|
Clinical utility of the polygenic LDL-C SNP score in familial hypercholesterolemia. Atherosclerosis 2019; 277:457-463. [PMID: 30270085 DOI: 10.1016/j.atherosclerosis.2018.06.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/16/2018] [Accepted: 06/07/2018] [Indexed: 01/28/2023]
Abstract
Mutations in any of three genes (LDLR, APOB and PCSK9) are known to cause autosomal dominant FH, but a mutation can be found in only ∼40% of patients with a clinical diagnosis of FH. In the remainder, a polygenic aetiology may be the cause of the phenotype, due to the co-inheritance of common LDL-C raising variants. In 2013, we reported the development of a 12-SNP LDL-C "SNP-Score" based on common variants identified as LDL-C raising from genome wide association consortium studies, and have confirmed the validity of this score in samples of no-mutation FH adults and children from more than six countries with European-Caucasian populations. In more than 80% of those with a clinical diagnosis of FH but with no detectable mutation in LDLR/APOB/PCSK9, the polygenic explanation is the most likely for their hypercholesterolaemia. Those with a low score (in the bottom two deciles) may have a mutation in a novel gene, and further research including whole exome or whole genome sequencing is warranted. Only in families where the index case has a monogenic cause should cascade testing be carried out, using DNA tests for an unambiguous identification of affected relatives. The clinical utility of the polygenic explanation is that it supports a more conservative (less aggressive) treatment care pathway for those with no mutation. The ability to distinguish those with a clinical diagnosis of FH who have a monogenic or a polygenic cause of their hypercholesterolaemia is a paradigm example of the use of genomic information to inform Precision Medicine using lipid lowering agents with different efficacy and costs.
Collapse
|
17
|
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: 35] [Impact Index Per Article: 7.0] [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.
Collapse
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
| | | |
Collapse
|
18
|
Lethal privacy: Quantifying life years lost if the right to informational self-determination guides genetic screening for Lynch syndrome. Health Policy 2019; 123:1004-1010. [PMID: 31492458 DOI: 10.1016/j.healthpol.2019.08.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 08/19/2019] [Accepted: 08/20/2019] [Indexed: 12/21/2022]
Abstract
Genetic relatives of hereditary colorectal cancer patients with Lynch syndrome (LS) are at risk of cancer. Testing both colorectal cancer patients and relatives of mutation carriers for LS allows targeted prevention. However, this could mean disclosing sensitive health data to family members. In light of potential trade-offs between cost-effectiveness and patient privacy, this study investigates the implications of increasing test uptake in Germany. Out of 22 screening strategies for LS, the non-dominated and current German strategies were assessed from the perspective of the statutory health insurance. Life years gained by increased prevention were estimated with Markov models. The effects and implications of different test uptake rates in index patients and their relatives were investigated by scenario analysis. Privacy limitations could yield health gains of up to 2500 undiscounted life years for first-degree relatives of index patients and substantially improve cost-effectiveness. However, this approach may contradict the right to informational self-determination. This study demonstrates the effect higher LS test uptakes could have on the lives and rights of colorectal cancer patients and their relatives. It shows potential conflicts between the efficient use of health care resources on the one hand and reasonable consideration of patient autonomy on the other.
Collapse
|
19
|
Sturm AC, Knowles JW, Gidding SS, Ahmad ZS, Ahmed CD, Ballantyne CM, Baum SJ, Bourbon M, Carrié A, Cuchel M, de Ferranti SD, Defesche JC, Freiberger T, Hershberger RE, Hovingh GK, Karayan L, Kastelein JJP, Kindt I, Lane SR, Leigh SE, Linton MF, Mata P, Neal WA, Nordestgaard BG, Santos RD, Harada-Shiba M, Sijbrands EJ, Stitziel NO, Yamashita S, Wilemon KA, Ledbetter DH, Rader DJ. Clinical Genetic Testing for Familial Hypercholesterolemia: JACC Scientific Expert Panel. J Am Coll Cardiol 2019; 72:662-680. [PMID: 30071997 DOI: 10.1016/j.jacc.2018.05.044] [Citation(s) in RCA: 334] [Impact Index Per Article: 66.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 05/11/2018] [Accepted: 05/15/2018] [Indexed: 01/01/2023]
Abstract
Although awareness of familial hypercholesterolemia (FH) is increasing, this common, potentially fatal, treatable condition remains underdiagnosed. Despite FH being a genetic disorder, genetic testing is rarely used. The Familial Hypercholesterolemia Foundation convened an international expert panel to assess the utility of FH genetic testing. The rationale includes the following: 1) facilitation of definitive diagnosis; 2) pathogenic variants indicate higher cardiovascular risk, which indicates the potential need for more aggressive lipid lowering; 3) increase in initiation of and adherence to therapy; and 4) cascade testing of at-risk relatives. The Expert Consensus Panel recommends that FH genetic testing become the standard of care for patients with definite or probable FH, as well as for their at-risk relatives. Testing should include the genes encoding the low-density lipoprotein receptor (LDLR), apolipoprotein B (APOB), and proprotein convertase subtilisin/kexin 9 (PCSK9); other genes may also need to be considered for analysis based on patient phenotype. Expected outcomes include greater diagnoses, more effective cascade testing, initiation of therapies at earlier ages, and more accurate risk stratification.
Collapse
Affiliation(s)
- Amy C Sturm
- Genomic Medicine Institute, Geisinger, Danville, Pennsylvania.
| | - Joshua W Knowles
- Department of Medicine, Division of Cardiovascular Medicine, and Cardiovascular Institute, Stanford University, Stanford California; The Familial Hypercholesterolemia Foundation, Pasadena, California
| | - Samuel S Gidding
- Nemours Cardiac Center, A.I. DuPont Hospital for Children, Wilmington, Delaware
| | - Zahid S Ahmad
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas
| | | | | | - Seth J Baum
- The Familial Hypercholesterolemia Foundation, Pasadena, California; Department of Integrated Medical Sciences, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, Florida
| | - Mafalda Bourbon
- Unidade I&D, Grupo de Investigação Cardiovascular, Departamento de Promoção da Saúde e Doenças Não Transmissíveis, Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisboa, Portugal; University of Lisboa, Faculty of Sciences, BioISI-Biosystems & Integrative Sciences Institute, Lisboa, Portugal
| | - Alain Carrié
- Sorbonne Université and Centre de Génétique Moléculaire et Chromosomique, unité de Génétique de l'Obésitéet des dyslipidémies, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - Marina Cuchel
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Sarah D de Ferranti
- Department of Cardiology, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Joep C Defesche
- Department of Clinical Genetics, Academic Medical Center at the University of Amsterdam, Amsterdam, the Netherlands
| | - Tomas Freiberger
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic; Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Ray E Hershberger
- Department of Internal Medicine, Wexner Medical Center at The Ohio State University, Columbus, Ohio
| | - G Kees Hovingh
- Department of Vascular Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | - Lala Karayan
- The Familial Hypercholesterolemia Foundation, Pasadena, California
| | | | - Iris Kindt
- The Familial Hypercholesterolemia Foundation, Pasadena, California
| | - Stacey R Lane
- The Familial Hypercholesterolemia Foundation, Pasadena, California
| | - Sarah E Leigh
- Bioinformatics, Genomics England, Queen Mary University of London, London, United Kingdom
| | - MacRae F Linton
- Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Pedro Mata
- Fundación Hipercolesterolemia Familiar, Madrid, Spain
| | - William A Neal
- The Familial Hypercholesterolemia Foundation, Pasadena, California; Department of Pediatrics (Cardiology), West Virginia University, Morgantown, West Virginia
| | - Børge G Nordestgaard
- Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Raul D Santos
- Lipid Clinic Heart Institute (InCor) University of São Paulo Medical School Hospital and Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Mariko Harada-Shiba
- Department of Molecular Innovation in Lipidology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Eric J Sijbrands
- Department of Internal Medicine, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Nathan O Stitziel
- Department of Medicine, Division of Cardiology, Department of Genetics, McDonnell Genome Institute, Washington University School of Medicine, St. Louis, Missouri
| | - Shizuya Yamashita
- Department of Cardiovascular Medicine, Rinku General Medical Center, Osaka, Japan; Departments of Community Medicine and Cardiovascular Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | | | | | - Daniel J Rader
- The Familial Hypercholesterolemia Foundation, Pasadena, California; Departments of Genetics, Medicine, and Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | | |
Collapse
|
20
|
Kruger V, Redlinger‐Grosse K, Walters ST, Ash E, Cragun D, McCarthy Veach P, Zierhut HA. Development of a motivational interviewing genetic counseling intervention to increase cascade cholesterol screening in families of children with familial hypercholesterolemia. J Genet Couns 2019; 28:1059-1064. [DOI: 10.1002/jgc4.1145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Valerie Kruger
- Department of Genetics, Cell Biology, and Development University of Minnesota—Twin Cities Minneapolis Minnesota
| | - Krista Redlinger‐Grosse
- Department of Genetics, Cell Biology, and Development University of Minnesota—Twin Cities Minneapolis Minnesota
| | - Scott T. Walters
- School of Public Health University of North Texas Health Science Center Fort Worth Texas
| | - Erin Ash
- Genetic Counseling Program Sarah Lawrence College Broxville New York
| | - Deborah Cragun
- College of Public Health University of South Florida Tampa Florida
| | - Patricia McCarthy Veach
- Department of Genetics, Cell Biology, and Development University of Minnesota—Twin Cities Minneapolis Minnesota
| | - Heather A. Zierhut
- Department of Genetics, Cell Biology, and Development University of Minnesota—Twin Cities Minneapolis Minnesota
| |
Collapse
|
21
|
Henrikson NB, Blasi PR, Fullerton SM, Grafton J, Leppig KA, Jarvik GP, Larson EB. "It would be so much easier": health system-led genetic risk notification-feasibility and acceptability of cascade screening in an integrated system. J Community Genet 2019; 10:461-470. [PMID: 30843145 PMCID: PMC6754469 DOI: 10.1007/s12687-019-00412-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 01/04/2019] [Accepted: 02/07/2019] [Indexed: 11/02/2022] Open
Abstract
Assess the feasibility and acceptability of health system-led genetic risk notification in a US integrated health system. We conducted semi-structured phone interviews with individuals age 40-64 years who had undergone genetic sequencing, but had not yet received their results, assessing attitudes to direct outreach to relatives. During each interview, we collected contact information for adult relatives identified as members of the same system and attempted to identify each relative in administrative data. We conducted 20 interviews. Most participants expressed support for Kaiser Permanente Washington involvement in familial risk notification. Direct outreach to relatives received the most unqualified support; outreach to the relatives' physician or interaction with the relatives' electronic medical record received more tempered support. Support was motivated by the desire to have risk communicated accurately and quickly. The most common caveat was a desire to alert relatives before the health system contacted them. Of 57 named relatives who were members of the same health system, we retrieved a single match for 40 (70.2%) based on name or birthdate. Health system involvement in familial risk notification received support in a sample of patients in a US integrated health system, and identification of relatives is feasible.
Collapse
Affiliation(s)
- Nora B Henrikson
- Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA.
| | - Paula R Blasi
- Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA
| | - Stephanie M Fullerton
- Department of Bioethics and Humanities, School of Medicine, University of Washington, Seattle, WA, USA
| | - Jane Grafton
- Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA
| | | | - Gail P Jarvik
- Departments of Medicine (Medical Genetics) and Genome Sciences, University of Washington, Seattle, WA, USA
| | - Eric B Larson
- Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA
| |
Collapse
|
22
|
Chan MLY, Cheung CL, Lee ACH, Yeung CY, Siu CW, Leung JYY, Pang HK, Tan KCB. Genetic variations in familial hypercholesterolemia and cascade screening in East Asians. Mol Genet Genomic Med 2018; 7:e00520. [PMID: 30592178 PMCID: PMC6393658 DOI: 10.1002/mgg3.520] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 10/11/2018] [Accepted: 10/25/2018] [Indexed: 11/09/2022] Open
Abstract
Background Familial hypercholesterolemia (FH) is a monogenic disorder of lipoprotein metabolism leading to an increased risk of premature cardiovascular disease. Genetic testing for FH is not commonly used in Asian countries. We aimed to define the genetic spectrum of FH in Hong Kong and to test the feasibility of cascade genetic screening. Methods Ninety‐six Chinese subjects with a clinical diagnosis of FH were recruited, and family‐based cascade screening incorporating genetic testing results was performed. Results Forty‐two distinct mutations were identified in 67% of the index FH cases. The majority of causative mutations were in the LDLR gene. The three commonest mutations in the LDLR gene were NM_000527.4(LDLR): c.1241 T>G, NM_000527.4(LDLR): c.1474G>A, and NM_000527.4(LDLR): c. 682G>A, and nine novel variants were identified. The NM_000384.2(APOB): c.10579 C>T variant of the APOB gene was found in 5% of the index subjects. The presence of causative mutation significantly increased the odds of successful family recruitment for screening with an OR of 3.7 (95% CI: 1.53–9.11, p = 0.004). Conclusion Approximately two‐third of the subjects in this clinically ascertained sample of patients with FH had a discrete genetic basis. Genetic identification improves the response rate and efficiency of family screening.
Collapse
Affiliation(s)
| | - Ching-Lung Cheung
- Department of Pharmacology and Pharmacy, University of Hong Kong, Hong Kong, Hong Kong
| | | | - Chun-Yip Yeung
- Department of Medicine, University of Hong Kong, Hong Kong, Hong Kong
| | - Chung-Wah Siu
- Department of Medicine, University of Hong Kong, Hong Kong, Hong Kong
| | | | - Ho-Kwong Pang
- Department of Medicine, Pamela Youde Nethersole Eastern Hospital, Hong Kong, Hong Kong
| | | |
Collapse
|
23
|
Wald DS, Wald NJ. Integration of child-parent screening and cascade testing for familial hypercholesterolaemia. J Med Screen 2018; 26:71-75. [PMID: 30319009 PMCID: PMC6484821 DOI: 10.1177/0969141318796856] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Objective To integrate child–parent screening and cascade testing into a single pathway-child-parent cascade screening (CPCS), for the identification of familial hypercholesterolaemia in the population and to estimate the number of new familial hypercholesterolaemia cases identified per child screened and the associated costs. Methods We applied the results from the published MRC Child–Parent Screening Study to 10,000 children, together with cascade testing first degree relatives of parents with a familial hypercholesterolaemia mutation identified by child–parent screening. We estimated the number of familial hypercholesterolaemia cases identified per child screened, the median cost per familial hypercholesterolaemia case identified and the median cost per child screened to identify one case using a range of cholesterol and familial hypercholesterolaemia mutation testing costs. We present a case study to illustrate the application of CPCS in practice. Results CPCS identifies one new familial hypercholesterolaemia case per 70 children screened at a median estimated cost of £960 per new familial hypercholesterolaemia case or £4 per child screened. CPCS identifies an average of four new familial hypercholesterolaemia cases per family. In the case study, six new familial hypercholesterolaemia cases were identified, and preventive treatment started in five, with the index child expected to start when older. Conclusion CPCS for familial hypercholesterolaemia are complementary strategies. The sustainability of cascade testing relies on identifying new unrelated index cases. This is achieved with population-wide child–parent screening. Integrated CPCS is currently better than either method of familial hypercholesterolaemia detection alone. It has the potential to identify all, or nearly all, individuals with familial hypercholesterolaemia in the population at low cost.
Collapse
Affiliation(s)
- David S Wald
- Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - Nicholas J Wald
- Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| |
Collapse
|
24
|
Brett T, Qureshi N, Gidding S, Watts GF. Screening for familial hypercholesterolaemia in primary care: Time for general practice to play its part. Atherosclerosis 2018; 277:399-406. [DOI: 10.1016/j.atherosclerosis.2018.08.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 08/16/2018] [Accepted: 08/21/2018] [Indexed: 12/21/2022]
|
25
|
Wurtmann E, Steinberger J, Veach PM, Khan M, Zierhut H. Risk Communication in Families of Children with Familial Hypercholesterolemia: Identifying Motivators and Barriers to Cascade Screening to Improve Diagnosis at a Single Medical Center. J Genet Couns 2018; 28:10.1007/s10897-018-0290-0. [PMID: 30109451 DOI: 10.1007/s10897-018-0290-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 08/02/2018] [Indexed: 11/25/2022]
Abstract
Familial hypercholesterolemia (FH) is severely underdiagnosed in the USA; yet, factors influencing family notification about risk for FH in the US pediatric setting have not been well elucidated. Most previous research on these factors has occurred in adult patient populations in European countries with organized cascade screening programs; therefore, we sought to characterize parent experiences with cascade screening in the US pediatric setting. A quantitative survey measuring family notification of FH risk information was administered to 38 parents of children with FH identified within a pediatric cardiology clinic. Participants were also asked if family notification was impacted by intrapersonal, interpersonal, institutional, community, and public policy factors identified previously in other populations. Notification of at least one of the proband's living grandparents or aunts/uncles was reported by 76% (n = 25/33) and 71% (n = 24/34) of participants, respectively. The most common reason for notification was to protect relatives from heart disease. Two of the most common reasons participants did not notify relatives were a lack of information about FH and concern that the relative would have difficulty understanding the information. Yet, only a minority of participants (39%) accessed institutional resources such as educational materials to share with relatives or assistance drafting a family letter that could address these barriers. Based on the identified barriers and motivators for family communication, we suggest facilitators to improve implementation of cascade screening.
Collapse
Affiliation(s)
- Elisabeth Wurtmann
- Department of Genetics, Cell Biology, and Development, University of Minnesota, 6-160 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA
| | - Julia Steinberger
- Division of Cardiology, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Pat McCarthy Veach
- Department of Genetics, Cell Biology, and Development, University of Minnesota, 6-160 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA
| | - Mindi Khan
- Division of Cardiology, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Heather Zierhut
- Department of Genetics, Cell Biology, and Development, University of Minnesota, 6-160 Jackson Hall, 321 Church St SE, Minneapolis, MN, 55455, USA.
| |
Collapse
|
26
|
McKay AJ, Hogan H, Humphries SE, Marks D, Ray KK, Miners A. Universal screening at age 1-2 years as an adjunct to cascade testing for familial hypercholesterolaemia in the UK: A cost-utility analysis. Atherosclerosis 2018; 275:434-443. [PMID: 29937236 DOI: 10.1016/j.atherosclerosis.2018.05.047] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 05/25/2018] [Accepted: 05/30/2018] [Indexed: 02/03/2023]
Abstract
BACKGROUND AND AIMS Familial hypercholesterolaemia (FH) is widely underdiagnosed. Cascade testing (CT) of relatives has been shown to be feasible, acceptable and cost-effective in the UK, but requires a supply of index cases. Feasibility of universal screening (US) at age 1-2 years was recently demonstrated. We examined whether this would be a cost-effective adjunct to CT in the UK, given the current and plausible future undiagnosed FH prevalence. METHODS Seven cholesterol and/or mutation-based US ± reverse cascade testing (RCT) alternatives were compared with no US in an incremental analysis with a healthcare perspective. A decision model was used to estimate costs and outcomes for cohorts exposed to the US component of each strategy. RCT case ascertainment was modelled using recent UK CT data, and probabilistic Markov models estimated lifetime costs and health outcomes for the cohorts screened under each alternative. 1000 Monte Carlo simulations were run for each model, and average outcomes reported. Further uncertainty was explored deterministically. Threshold analysis investigated the association between undiagnosed FH prevalence and cost-effectiveness. RESULTS A strategy involving cholesterol screening followed by diagnostic genetic testing and RCT was the most cost-effective modelled (incremental cost-effectiveness ratio (ICER) versus no US £12,480/quality adjusted life year (QALY); probability of cost-effectiveness 96·8% at £20,000/QALY threshold). Cost-effectiveness was robust to both deterministic sensitivity analyses and threshold analyses that modelled ongoing case ascertainment at theoretical maximum levels. CONCLUSIONS These findings support implementation of universal cholesterol screening followed by diagnostic genetic testing and RCT for FH, under a UK conventional willingness-to-pay threshold.
Collapse
Affiliation(s)
- Ailsa J McKay
- London School of Hygiene and Tropical Medicine, London, UK; Department of Primary Care and Public Health, Imperial College London, London, UK.
| | - Helen Hogan
- Department of Health Services Research and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Steve E Humphries
- Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - Dalya Marks
- Department of Public Health, Environments and Society, London School of Hygiene and Tropical Medicine, London, UK
| | - Kausik K Ray
- Department of Primary Care and Public Health, Imperial College London, London, UK
| | - Alec Miners
- Department of Health Services Research and Policy, London School of Hygiene and Tropical Medicine, London, UK
| |
Collapse
|
27
|
Kerr M, Pears R, Miedzybrodzka Z, Haralambos K, Cather M, Watson M, Humphries SE. Cost effectiveness of cascade testing for familial hypercholesterolaemia, based on data from familial hypercholesterolaemia services in the UK. Eur Heart J 2018; 38:1832-1839. [PMID: 28387827 PMCID: PMC5837803 DOI: 10.1093/eurheartj/ehx111] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 02/28/2017] [Indexed: 01/14/2023] Open
Abstract
Aims Familial hypercholesterolaemia (FH) is a vastly under-diagnosed genetic disorder, associated with early development of coronary heart disease and premature mortality which can be substantially reduced by effective treatment. Patents have recently expired on high-intensity statins, reducing FH treatment costs. We build a model using UK data to estimate the cost effectiveness of DNA testing of relatives of those with monogenic FH. Methods and Results A Markov model was used to estimate the cost effectiveness of cascade testing, using data from UK cascade services. The estimated incremental cost effectiveness ratio (ICER) was £5806 and the net marginal lifetime cost per relative tested was £2781. More than 80% of lifetime costs were diagnosis-related and incurred in the 1st year. In UK services, 23% of 6396 index cases were mutation-positive. For each mutation-positive index case, 1.33 relatives were tested, resulting overall in a rate of 0.31 tested relatives per tested index case. If the number of relatives tested per tested index case rose to 3.2 (projected by National Institute for Health and Care Excellence in 2008) the ICER would reduce to £2280 and lifetime costs to £1092. Conclusion Cascade testing of relatives of those with suspected FH is highly cost effective. The current Europe-wide high levels of undiagnosed FH, and associated morbidity and mortality, mean adoption of cascade services should yield substantial quality of life and survival gains.
Collapse
Affiliation(s)
- Marion Kerr
- Economics Department, Insight Health Economics Ltd., 16 Cambrian Road, Richmond, Surrey TW10 6JQ, UK
| | - Robert Pears
- Public Health Department, Hampshire County Council, Elizabeth II Court South, Winchester SO23 8UJ, UK
| | - Zofia Miedzybrodzka
- Department of Medical Genetics, University of Aberdeen, Polwarth Building, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Kate Haralambos
- Wales Heart Research Institute, Cardiff University, Heath Park, Cardiff CF14 4XN, UK
| | - Moyra Cather
- Northern Ireland Regional Genetics Centre, Regional Genetics Laboratories, Belfast City Hospital, Lisburn Road, Belfast BT9 7AB, UK
| | - Melanie Watson
- Wessex Clinical Genetics Service, University Hospital Southampton NHS Foundation Trust, Princess Anne Hospital, Coxford Road, Southampton SO16 5YA, UK
| | - Steve E Humphries
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, 5 University Street, London WC1E 6JJ, UK
| |
Collapse
|
28
|
Crosland P, Maconachie R, Buckner S, McGuire H, Humphries SE, Qureshi N. Cost-utility analysis of searching electronic health records and cascade testing to identify and diagnose familial hypercholesterolaemia in England and Wales. Atherosclerosis 2018; 275:80-87. [PMID: 29879685 DOI: 10.1016/j.atherosclerosis.2018.05.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 05/04/2018] [Accepted: 05/16/2018] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND AIMS The cost effectiveness of cascade testing for familial hypercholesterolaemia (FH) is well recognised. Less clear is the cost effectiveness of FH screening when it includes case identification strategies that incorporate routinely available data from primary and secondary care electronic health records. METHODS Nine strategies were compared, all using cascade testing in combination with different index case approaches (primary care identification, secondary care identification, and clinical assessment using the Simon Broome (SB) or Dutch Lipid Clinic Network (DLCN) criteria). A decision analytic model was informed by three systematic literature reviews and expert advice provided by a NICE Guideline Committee. RESULTS The model found that the addition of primary care case identification by database search for patients with recorded total cholesterol >9.3 mmol/L was more cost effective than cascade testing alone. The incremental cost-effectiveness ratio (ICER) of clinical assessment using the DLCN criteria was £3254 per quality-adjusted life year (QALY) compared with case-finding with no genetic testing. The ICER of clinical assessment using the SB criteria was £13,365 per QALY (compared with primary care identification using the DLCN criteria), indicating that the SB criteria was preferred because it achieved additional health benefits at an acceptable cost. Secondary care identification, with either the SB or DLCN criteria, was not cost effective, alone (dominated and dominated respectively) or combined with primary care identification (£63, 514 per QALY, and £82,388 per QALY respectively). CONCLUSIONS Searching primary care databases for people at high risk of FH followed by cascade testing is likely to be cost-effective.
Collapse
Affiliation(s)
- Paul Crosland
- Deakin University, Geelong Australia, Centre for Population Health Research, School of Health and Social Development, Australia.
| | - Ross Maconachie
- National Institute for Health and Care Excellence, Centre for Guidelines, London, UK
| | - Sara Buckner
- National Institute for Health and Care Excellence, Centre for Guidelines, London, UK
| | - Hugh McGuire
- National Institute for Health and Care Excellence, Centre for Guidelines, London, UK
| | - Steve E Humphries
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - Nadeem Qureshi
- Division of Primary Care, NIHR School of Primary Care Research, University of Nottingham, Nottingham, UK
| |
Collapse
|
29
|
Abstract
PURPOSE OF REVIEW Familial hypercholesterolaemia (FH) is an inherited disorder of low-density lipoprotein cholesterol (LDL-C) which is characterised by a raised cholesterol level from birth and a high risk of premature coronary heart disease. In this paper, we review the genetic basis of FH and its impact on the clinical presentation. RECENT FINDINGS Mutations in any of three genes (LDLR, APOB and PCSK9) are known to cause autosomal dominant FH, but a mutation can be found in only ∼40% of patients with a clinical diagnosis of FH. In the remainder, a polygenic aetiology is most likely, due to the co-inheritance of common LDL-C-raising variants. The cardiovascular presentation and management of FH will differ between patients based on their underlying genetic factors. New genotyping methods such as next-generation sequencing will provide us with better understanding of the genetic architecture of FH.
Collapse
Affiliation(s)
- Mahtab Sharifi
- Institute of Cardiovascular Science, University College London, 5 University St, London, WC1E 6JF, UK.,Department of Clinical Biochemistry, the Royal Free London NHS Foundation Trust, Pond Street, London, NW3 2QG, UK
| | - Marta Futema
- Institute of Cardiovascular Science, University College London, 5 University St, London, WC1E 6JF, UK
| | - Devaki Nair
- Department of Clinical Biochemistry, the Royal Free London NHS Foundation Trust, Pond Street, London, NW3 2QG, UK
| | - Steve E Humphries
- Institute of Cardiovascular Science, University College London, 5 University St, London, WC1E 6JF, UK.
| |
Collapse
|
30
|
Davis T, Andersen R, Andersen L, Testa H, Ibarra J. Combined Cascade Screening And Patient Education For Familial Hypercholesterolemia: Genetic Results From A Family Shared Medical Appointment Pilot Study. J Clin Lipidol 2016. [DOI: 10.1016/j.jacl.2016.03.042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
31
|
Henderson R, O'Kane M, McGilligan V, Watterson S. The genetics and screening of familial hypercholesterolaemia. J Biomed Sci 2016; 23:39. [PMID: 27084339 PMCID: PMC4833930 DOI: 10.1186/s12929-016-0256-1] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 04/03/2016] [Indexed: 11/14/2022] Open
Abstract
Familial Hypercholesterolaemia is an autosomal, dominant genetic disorder that leads to elevated blood cholesterol and a dramatically increased risk of atherosclerosis. It is perceived as a rare condition. However it affects 1 in 250 of the population globally, making it an important public health concern. In communities with founder effects, higher disease prevalences are observed. We discuss the genetic basis of familial hypercholesterolaemia, examining the distribution of variants known to be associated with the condition across the exons of the genes LDLR, ApoB, PCSK9 and LDLRAP1. We also discuss screening programmes for familial hypercholesterolaemia and their cost-effectiveness. Diagnosis typically occurs using one of the Dutch Lipid Clinic Network (DCLN), Simon Broome Register (SBR) or Make Early Diagnosis to Prevent Early Death (MEDPED) criteria, each of which requires a different set of patient data. New cases can be identified by screening the family members of an index case that has been identified as a result of referral to a lipid clinic in a process called cascade screening. Alternatively, universal screening may be used whereby a population is systematically screened. It is currently significantly more cost effective to identify familial hypercholesterolaemia cases through cascade screening than universal screening. However, the cost of sequencing patient DNA has fallen dramatically in recent years and if the rate of progress continues, this may change.
Collapse
Affiliation(s)
- Raymond Henderson
- Northern Ireland Centre for Stratified Medicine, Ulster University, C-TRIC, Altnagelvin Hospital Campus, Derry, Co Londonderry, Northern Ireland, BT47 6SB, UK
| | - Maurice O'Kane
- Department of Clinical Chemistry, Altnagelvin Hospital, Western Health and Social Care Trust, Londonderry, Northern Ireland, BT47 6SB, UK
| | - Victoria McGilligan
- Northern Ireland Centre for Stratified Medicine, Ulster University, C-TRIC, Altnagelvin Hospital Campus, Derry, Co Londonderry, Northern Ireland, BT47 6SB, UK
| | - Steven Watterson
- Northern Ireland Centre for Stratified Medicine, Ulster University, C-TRIC, Altnagelvin Hospital Campus, Derry, Co Londonderry, Northern Ireland, BT47 6SB, UK.
| |
Collapse
|
32
|
Andersen R, Andersen L. Examining barriers to cascade screening for familial hypercholesterolemia in the United States. J Clin Lipidol 2016; 10:225-7. [DOI: 10.1016/j.jacl.2015.12.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 12/03/2015] [Accepted: 12/18/2015] [Indexed: 10/22/2022]
|
33
|
Gidding SS, Champagne MA, de Ferranti SD, Defesche J, Ito MK, Knowles JW, McCrindle B, Raal F, Rader D, Santos RD, Lopes-Virella M, Watts GF, Wierzbicki AS. The Agenda for Familial Hypercholesterolemia: A Scientific Statement From the American Heart Association. Circulation 2015; 132:2167-92. [PMID: 26510694 DOI: 10.1161/cir.0000000000000297] [Citation(s) in RCA: 458] [Impact Index Per Article: 50.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
34
|
Watts GF, Pang J, Santos RD. Europe aspires to set the record straight on familial hypercholesterolaemia. Atherosclerosis 2015; 241:769-71. [DOI: 10.1016/j.atherosclerosis.2015.04.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 04/14/2015] [Indexed: 01/15/2023]
|
35
|
Santos RD, Frauches TS, Chacra APM. Cascade Screening in Familial Hypercholesterolemia: Advancing Forward. J Atheroscler Thromb 2015. [PMID: 26194978 DOI: 10.5551/jat.31237] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Familial hypercholesterolemia is a genetic disorder associated with elevated LDL-cholesterol and high lifetime cardiovascular risk. Both clinical and molecular cascade screening programs have been implemented to increase early definition and treatment. In this systematic review, we discuss the main issues found in 65 different articles related to cascade screening and familial hypercholesterolemia, covering a range of topics including different types/strategies, considerations both positive and negative regarding cascade screening in general and associated with the different strategies, cost and coverage consideration, direct and indirect contact with patients, public policy around life insurance and doctor-patient confidentiality, the "right to know," and public health concerns regarding familial hypercholesterolemia.
Collapse
Affiliation(s)
- Raul D Santos
- Lipid Clinic, Heart Institute (InCor), University of São Paulo Medical School Hospital
| | | | | |
Collapse
|
36
|
Bell DA, Pang J, Burrows S, Bates TR, van Bockxmeer FM, Hooper AJ, O'Leary P, Burnett JR, Watts GF. Effectiveness of genetic cascade screening for familial hypercholesterolaemia using a centrally co-ordinated clinical service: An Australian experience. Atherosclerosis 2015; 239:93-100. [DOI: 10.1016/j.atherosclerosis.2014.12.036] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 12/18/2014] [Accepted: 12/21/2014] [Indexed: 12/13/2022]
|
37
|
Screening for Familial Hypercholesterolaemia: Universal or Cascade? A Critique of Current FH Recognition Strategies. CURRENT CARDIOVASCULAR RISK REPORTS 2015. [DOI: 10.1007/s12170-014-0434-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
38
|
Knowles JW, O’Brien EC, Greendale K, Wilemon K, Genest J, Sperling LS, Neal WA, Rader DJ, Khoury MJ. Reducing the burden of disease and death from familial hypercholesterolemia: a call to action. Am Heart J 2014; 168:807-11. [PMID: 25458642 DOI: 10.1016/j.ahj.2014.09.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 09/08/2014] [Indexed: 10/24/2022]
Abstract
Familial hypercholesterolemia (FH) is a genetic disease characterized by substantial elevations of low-density lipoprotein cholesterol, unrelated to diet or lifestyle. Untreated FH patients have 20 times the risk of developing coronary artery disease, compared with the general population. Estimates indicate that as many as 1 in 500 people of all ethnicities and 1 in 250 people of Northern European descent may have FH; nevertheless, the condition remains largely undiagnosed. In the United States alone, perhaps as little as 1% of FH patients have been diagnosed. Consequently, there are potentially millions of children and adults worldwide who are unaware that they have a life-threatening condition. In countries like the Netherlands, the United Kingdom, and Spain, cascade screening programs have led to dramatic improvements in FH case identification. Given that there are currently no systematic approaches in the United States to identify FH patients or affected relatives, the patient-centric nonprofit FH Foundation convened a national FH Summit in 2013, where participants issued a "call to action" to health care providers, professional organizations, public health programs, patient advocacy groups, and FH experts, in order to bring greater attention to this potentially deadly, but (with proper diagnosis) eminently treatable, condition.
Collapse
|
39
|
Pang J, Sullivan DR, Harada-Shiba M, Ding PYA, Selvey S, Ali S, Watts GF. Significant gaps in awareness of familial hypercholesterolemia among physicians in selected Asia-Pacific countries: a pilot study. J Clin Lipidol 2014; 9:42-8. [PMID: 25670359 DOI: 10.1016/j.jacl.2014.09.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/19/2014] [Accepted: 09/23/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND Familial hypercholesterolemia (FH) is a dominantly inherited disorder characterized by high plasma cholesterol levels and a very high risk of early heart disease. The prevalence of FH is estimated to be at least 1:500, with at least 3.6 million individuals in the Asia-Pacific region. OBJECTIVE To assess awareness, knowledge, and perception of FH among practicing physicians in Japan, South Korea, and Taiwan. METHODS Physicians from 3 economically developed Asian countries were requested to anonymously complete a structured Internet-based survey regarding FH. This survey sought responses on the clinical description, inheritance, prevalence, cardiovascular disease risk, practices, and opinions on screening. RESULTS Of 230 physicians surveyed, 47% were aware of the heritability, 27% of the prevalence, and 13% of the risk of cardiovascular disease relating to FH. The majority (70%) perceived themselves to have an above-moderate familiarity with FH. Primary care physicians (59%) and lipid specialists (41%) were perceived as the best providers for caring for FH, including cascade screening services, with a lesser role perceived for cardiologists, endocrinologists, and no significant role for nursing staff. Only 35% of physicians were aware of specialist clinical services for lipid disorders in their geographic area. CONCLUSION Extensive education and training programs are required to complement the implementation of region-specific models of care for FH in Asia. Further enhancement of existing lipid services and facilities are also warranted to optimise service models.
Collapse
Affiliation(s)
- Jing Pang
- School of Medicine and Pharmacology, University of Western Australia, Western Australia, Australia
| | - David R Sullivan
- Department of Biochemistry, Royal Prince Alfred Hospital, University of Sydney, New South Wales, Australia
| | - Mariko Harada-Shiba
- Department of Molecular Innovation in Lipidology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Phillip Y A Ding
- Department of Cardiovascular Medicine, Yonghe Cardinal Tien Hospital, Fu Jen Catholic University, New Taipei City, Taiwan
| | | | - Shariq Ali
- Genzyme, A Sanofi Company, Cambridge, MA, USA
| | - Gerald F Watts
- School of Medicine and Pharmacology, University of Western Australia, Western Australia, Australia; Lipid Disorders Clinic, Cardiometabolic Service, Department of Internal Medicine, Royal Perth Hospital, Western Australia, Australia.
| |
Collapse
|
40
|
Abstract
PURPOSE OF REVIEW The purpose of this review is to describe advances in the diagnosis, cause, metabolism, risk factors for atherosclerosis, and treatment of familial hypercholesterolemia. RECENT FINDINGS Heterozygous familial hypercholesterolemia is almost four-fold more frequent than previously thought and is associated with 10-fold to 13-fold risk of cardiovascular disease comparing with normolipidemics. LDL receptor (LDLR) dysfunction and LDL-cholesterol (LDL-C) accumulation disturb the metabolism of other lipoprotein classes, such as chylomicrons and remnants and HDL. Next-generation sequencing can improve familial hypercholesterolemia molecular diagnosis due to its better performance and lower costs than usual techniques. Despite this, roughly 40% of familial hypercholesterolemia patients do not present mutations on the LDLR, apolipoprotein B, or proprotein convertase subtilisin/kexin type 9 genes. Many individuals with familial hypercholesterolemia phenotype have polygenic instead of monogenic cause of their elevated LDL-C concentrations. Individuals with familial hypercholesterolemia show elevated burden of subclinical atherosclerosis. The intensity of atherosclerosis burden is associated with the severity of LDLR mutation rather than maternal or paternal heritability. Newer-approved and on-development medications that reduce LDL-C hold promise for preventing cardiovascular disease in familial hypercholesterolemia. SUMMARY Familial hypercholesterolemia is frequent and currently underdiagnosed and undertreated, but effective cascade screening programs and early and intensive LDL-C lowering can change this picture and the natural history of the disease.
Collapse
Affiliation(s)
- Raul D Santos
- Heart Institute (InCor), University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil
| | | |
Collapse
|
41
|
Shepherd M, Colclough K, Ellard S, Hattersley AT. Ten years of the national genetic diabetes nurse network: a model for the translation of genetic information into clinical care. Clin Med (Lond) 2014; 14:117-21. [PMID: 24715120 PMCID: PMC4953280 DOI: 10.7861/clinmedicine.14-2-117] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Increasing technological advances have resulted in the recognition of a range of genetic conditions not traditionally seen by clinical genetics teams. This has implications for the education of other healthcare professionals who may have insufficient knowledge to identify or support families with these conditions. The national genetic diabetes nurse (GDN) project, which trains diabetes specialist nurses (DSNs), was started in 2002 to increase awareness of monogenic diabetes among healthcare professionals across the UK. This paper describes the development and evaluation of the first 10 years of this project, indicating that GDNs have increased diagnostic referral rates and supported local families through diagnosis and treatment changes across the UK. The GDN project has proved an effective, innovative means of disseminating new genetic information from a centre of excellence and is suggested as a model for the successful and rapid dissemination of genetic information into routine clinical care in other conditions.
Collapse
Affiliation(s)
- M Shepherd
- Exeter NIHR Clinical Research Facility, University of Exeter Medical School, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | - K Colclough
- Department of Molecular Genetics, Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | - S Ellard
- University of Exeter Medical School
- Royal Devon and Exeter NHS Foundation Trust, Exeter, UK
| | | |
Collapse
|
42
|
Hardcastle SJ, Legge E, Laundy CS, Egan SJ, French R, Watts GF, Hagger MS. Patients’ Perceptions and Experiences of Familial Hypercholesterolemia, Cascade Genetic Screening and Treatment. Int J Behav Med 2014; 22:92-100. [DOI: 10.1007/s12529-014-9402-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
43
|
Integrated guidance on the care of familial hypercholesterolemia from the International FH Foundation. J Clin Lipidol 2014; 8:148-72. [DOI: 10.1016/j.jacl.2014.01.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 01/04/2014] [Indexed: 12/11/2022]
|
44
|
Watts GF, Gidding S, Wierzbicki AS, Toth PP, Alonso R, Brown WV, Bruckert E, Defesche J, Lin KK, Livingston M, Mata P, Parhofer KG, Raal FJ, Santos RD, Sijbrands EJ, Simpson WG, Sullivan DR, Susekov AV, Tomlinson B, Wiegman A, Yamashita S, Kastelein JJ. Integrated guidance on the care of familial hypercholesterolaemia from the International FH Foundation. Int J Cardiol 2014; 171:309-25. [DOI: 10.1016/j.ijcard.2013.11.025] [Citation(s) in RCA: 221] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 11/02/2013] [Indexed: 12/18/2022]
|
45
|
Talmud PJ, Shah S, Whittall R, Futema M, Howard P, Cooper JA, Harrison SC, Li K, Drenos F, Karpe F, Neil HAW, Descamps OS, Langenberg C, Lench N, Kivimaki M, Whittaker J, Hingorani AD, Kumari M, Humphries SE. Use of low-density lipoprotein cholesterol gene score to distinguish patients with polygenic and monogenic familial hypercholesterolaemia: a case-control study. Lancet 2013; 381:1293-301. [PMID: 23433573 DOI: 10.1016/s0140-6736(12)62127-8] [Citation(s) in RCA: 415] [Impact Index Per Article: 37.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Familial hypercholesterolaemia is a common autosomal-dominant disorder caused by mutations in three known genes. DNA-based cascade testing is recommended by UK guidelines to identify affected relatives; however, about 60% of patients are mutation-negative. We assessed the hypothesis that familial hypercholesterolaemia can also be caused by an accumulation of common small-effect LDL-C-raising alleles. METHODS In November, 2011, we assembled a sample of patients with familial hypercholesterolaemia from three UK-based sources and compared them with a healthy control sample from the UK Whitehall II (WHII) study. We also studied patients from a Belgian lipid clinic (Hôpital de Jolimont, Haine St-Paul, Belgium) for validation analyses. We genotyped participants for 12 common LDL-C-raising alleles identified by the Global Lipid Genetics Consortium and constructed a weighted LDL-C-raising gene score. We compared the gene score distribution among patients with familial hypercholesterolaemia with no confirmed mutation, those with an identified mutation, and controls from WHII. FINDINGS We recruited 321 mutation-negative UK patients (451 Belgian), 319 mutation-positive UK patients (273 Belgian), and 3020 controls from WHII. The mean weighted LDL-C gene score of the WHII participants (0.90 [SD 0.23]) was strongly associated with LDL-C concentration (p=1.4 x 10(-77); R(2)=0.11). Mutation-negative UK patients had a significantly higher mean weighted LDL-C score (1.0 [SD 0.21]) than did WHII controls (p=4.5 x 10(-16)), as did the mutation-negative Belgian patients (0.99 [0.19]; p=5.2 x 10(-20)). The score was also higher in UK (0.95 [0.20]; p=1.6 x 10(-5)) and Belgian (0.92 [0.20]; p=0.04) mutation-positive patients than in WHII controls. 167 (52%) of 321 mutation-negative UK patients had a score within the top three deciles of the WHII weighted LDL-C gene score distribution, and only 35 (11%) fell within the lowest three deciles. INTERPRETATION In a substantial proportion of patients with familial hypercholesterolaemia without a known mutation, their raised LDL-C concentrations might have a polygenic cause, which could compromise the efficiency of cascade testing. In patients with a detected mutation, a substantial polygenic contribution might add to the variable penetrance of the disease. FUNDING British Heart Foundation, Pfizer, AstraZeneca, Schering-Plough, National Institute for Health Research, Medical Research Council, Health and Safety Executive, Department of Health, National Heart Lung and Blood Institute, National Institute on Aging, Agency for Health Care Policy Research, John D and Catherine T MacArthur Foundation Research Networks on Successful Midlife Development and Socio-economic Status and Health, Unilever, and Departments of Health and Trade and Industry.
Collapse
Affiliation(s)
- Philippa J Talmud
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Stef MA, Palacios L, Olano-Martín E, Foe-A-Man C, van de Kerkhof L, Klaaijsen LN, Molano A, Schuurman EJ, Tejedor D, Defesche JC. A DNA microarray for the detection of point mutations and copy number variation causing familial hypercholesterolemia in Europe. J Mol Diagn 2013; 15:362-72. [PMID: 23537714 DOI: 10.1016/j.jmoldx.2013.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 12/18/2012] [Accepted: 01/04/2013] [Indexed: 11/16/2022] Open
Abstract
To facilitate genetic cascade screening for familial hypercholesterolemia (FH) in Europe, two versions (7 and 9) of a DNA microarray were developed to detect the most frequent point mutations in the low-density lipoprotein receptor (LDLR), apolipoprotein B (APOB), and proprotein convertase subtilisin/kexin 9 (PCSK9) genes. The design of these microarrays is based on LIPOchip, version 4, which detects 191 LDLR and APOB mutations identified in Spanish patients with FH. A major improvement of LIPOchip, versions 7 and 9, is the ability to detect copy number variation (deletions or duplications of entire exons) in LDLR, thus abolishing the need to perform multiplex ligase-dependent probe amplification in patients with FH. The aim of this study was to validate a tool capable of detecting point mutations and copy number variations simultaneously and to evaluate its use and the newly developed software for analysis in clinical practice by reanalysis of several patients with known mutations causing FH. With the help of these validations, several aspects were analyzed, improved, and implemented in a newer version, which was evaluated through an internal validation.
Collapse
|
47
|
Morris JK, Wald DS, Wald NJ. The evaluation of cascade testing for familial hypercholesterolemia. Am J Med Genet A 2011; 158A:78-84. [DOI: 10.1002/ajmg.a.34368] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Accepted: 10/06/2011] [Indexed: 12/22/2022]
|
48
|
|
49
|
Hallowell N, Jenkins N, Douglas M, Walker S, Finnie R, Porteous M, Lawton J. Patients' experiences and views of cascade screening for familial hypercholesterolemia (FH): a qualitative study. J Community Genet 2011; 2:249-57. [PMID: 22109877 DOI: 10.1007/s12687-011-0064-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 08/08/2011] [Indexed: 11/26/2022] Open
Abstract
Familial DNA cascade screening for familial hypercholesterolemia (FH) has recently been introduced in Scotland. This study investigated index patients' experiences of DNA testing and mediating cascade screening. Thirty-eight patients with a clinical diagnosis of definite or possible FH who had undergone DNA testing in the lipid clinic took part in semi-structured qualitative interviews. All patients were positive about DNA screening being undertaken by familiar and trusted clinicians within the lipid clinic. Most patients had already cascaded close relatives for serum cholesterol testing following their attendance at the lipid clinic. Identified mutation carriers who had attended the genetics clinic (n = 15) for a cascading appointment described finding this consultation helpful because it identified other at-risk family members and provided them with tailored information for their relatives. Participants who expressed a preference said they favoured indirect (patient-mediated) methods of cascading as they considered indirect approaches to be less threatening to family members than direct clinical contact. We conclude that DNA screening and indirect familial cascading is perceived as highly acceptable to index patients with FH. However, while indirect cascading methods may be more acceptable to patients, they do not yield the same numbers as more direct methods. There is, therefore, a need for further systematic research to investigate patients', family members' and staff views of the acceptability of direct versus indirect methods of cascade screening.
Collapse
Affiliation(s)
- Nina Hallowell
- Institute of Health and Society, Newcastle University, Newcastle, UK,
| | | | | | | | | | | | | |
Collapse
|
50
|
Aarden E, Van Hoyweghen I, Horstman K. The paradox of public health genomics: Definition and diagnosis of familial hypercholesterolaemia in three European countries. Scand J Public Health 2011; 39:634-9. [DOI: 10.1177/1403494811414241] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Aims: Considerable progress in public health is expected to occur from the application of genomic knowledge and technologies. This is the subject of a newly emerging field of public health genomics. In this paper we analyze differences in how public health genomics is developing in the Netherlands, the UK and Germany through the definition and diagnosis of familial hypercholesterolaemia (FH), an inherited predisposition for coronary heart disease. Methods: We analyzed the emergence of public health genomics within the framework of a project on the incorporation of genetics in western European healthcare schemes. Our analysis is based on document analysis and in-depth interviews. Results: In the Netherlands, public health genomics takes shape through a genetic screening programme for FH, looking for mutations on two specific genes; in the UK it emerges through a strategy of ‘‘mainstreaming’’ genetics in health care that aims to identify hereditary predispositions by means of phenotypic diagnosis; and in Germany public health genomics is elaborated at a conceptual level, leaving a diagnosis of FH to individual physicians who occasionally prescribe genetic testing. Conclusions: Our analysis shows how public health genomics gets constituted differently in different countries and, moreover, produces particular patterns of inclusion and exclusion from care. These patterns indicate a paradox in public health genomics, which consists of an inverse relationship between the use of advanced molecular genetic testing technologies and the number and variety of individuals at risk included in the target population. This paradox presents a challenge for professionals and policy makers in public health genomics.
Collapse
Affiliation(s)
- Erik Aarden
- RWTH Aachen University, Futures Studies, Institute of Political Science, Aachen, Germany,
| | - Ine Van Hoyweghen
- Maastricht University, Health, Ethics and Society/School of Public Health and Primary Care (CAPHRI), Maastricht, The Netherlands
| | - Klasien Horstman
- Maastricht University, Health, Ethics and Society/School of Public Health and Primary Care (CAPHRI), Maastricht, The Netherlands
| |
Collapse
|