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Puckelwartz MJ, Pesce LL, Hernandez EJ, Webster G, Dellefave-Castillo LM, Russell MW, Geisler SS, Kearns SD, Karthik F, Etheridge SP, Monroe TO, Pottinger TD, Kannankeril PJ, Shoemaker MB, Fountain D, Roden DM, Faulkner M, MacLeod HM, Burns KM, Yandell M, Tristani-Firouzi M, George AL, McNally EM. The impact of damaging epilepsy and cardiac genetic variant burden in sudden death in the young. Genome Med 2024; 16:13. [PMID: 38229148 PMCID: PMC10792876 DOI: 10.1186/s13073-024-01284-w] [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: 02/22/2023] [Accepted: 01/03/2024] [Indexed: 01/18/2024] Open
Abstract
BACKGROUND Sudden unexpected death in children is a tragic event. Understanding the genetics of sudden death in the young (SDY) enables family counseling and cascade screening. The objective of this study was to characterize genetic variation in an SDY cohort using whole genome sequencing. METHODS The SDY Case Registry is a National Institutes of Health/Centers for Disease Control and Prevention surveillance effort to discern the prevalence, causes, and risk factors for SDY. The SDY Case Registry prospectively collected clinical data and DNA biospecimens from SDY cases < 20 years of age. SDY cases were collected from medical examiner and coroner offices spanning 13 US jurisdictions from 2015 to 2019. The cohort included 211 children (median age 0.33 year; range 0-20 years), determined to have died suddenly and unexpectedly and from whom DNA biospecimens for DNA extractions and next-of-kin consent were ascertained. A control cohort consisted of 211 randomly sampled, sex- and ancestry-matched individuals from the 1000 Genomes Project. Genetic variation was evaluated in epilepsy, cardiomyopathy, and arrhythmia genes in the SDY and control cohorts. American College of Medical Genetics/Genomics guidelines were used to classify variants as pathogenic or likely pathogenic. Additionally, pathogenic and likely pathogenic genetic variation was identified using a Bayesian-based artificial intelligence (AI) tool. RESULTS The SDY cohort was 43% European, 29% African, 3% Asian, 16% Hispanic, and 9% with mixed ancestries and 39% female. Six percent of the cohort was found to harbor a pathogenic or likely pathogenic genetic variant in an epilepsy, cardiomyopathy, or arrhythmia gene. The genomes of SDY cases, but not controls, were enriched for rare, potentially damaging variants in epilepsy, cardiomyopathy, and arrhythmia-related genes. A greater number of rare epilepsy genetic variants correlated with younger age at death. CONCLUSIONS While damaging cardiomyopathy and arrhythmia genes are recognized contributors to SDY, we also observed an enrichment in epilepsy-related genes in the SDY cohort and a correlation between rare epilepsy variation and younger age at death. These findings emphasize the importance of considering epilepsy genes when evaluating SDY.
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Affiliation(s)
- Megan J Puckelwartz
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - Lorenzo L Pesce
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | | | - Gregory Webster
- Division of Cardiology, Department of Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | | | - Mark W Russell
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA
| | - Sarah S Geisler
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA
| | - Samuel D Kearns
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Felix Karthik
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Susan P Etheridge
- Division of Pediatric Cardiology, University of Utah, Salt Lake City, UT, USA
| | - Tanner O Monroe
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Tess D Pottinger
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Prince J Kannankeril
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - M Benjamin Shoemaker
- Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Darlene Fountain
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Dan M Roden
- Departments of Medicine, Pharmacology, and Biomedical Informatics, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | | | - Kristin M Burns
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Mark Yandell
- Department of Human Genetics, University of Utah, Salt Lake City, UT, USA
| | | | - Alfred L George
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Elizabeth M McNally
- Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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Bard AM, Clark LV, Cosgun E, Aldinger KA, Timms A, Quina LA, Lavista Ferres JM, Jardine D, Haas EA, Becker TM, Pagan CM, Santani A, Martinez D, Barua S, McNutt Z, Nesbitt A, Mitchell EA, Ramirez JM. Known pathogenic gene variants and new candidates detected in Sudden Unexpected Infant Death using Whole Genome Sequencing. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.09.11.23295207. [PMID: 37745463 PMCID: PMC10516094 DOI: 10.1101/2023.09.11.23295207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Purpose To gain insights into potential genetic factors contributing to the infant's vulnerability to Sudden Unexpected Infant Death (SUID). Methods Whole Genome Sequencing (WGS) was performed on 145 infants that succumbed to SUID, and 576 healthy adults. Variants were filtered by gnomAD allele frequencies and predictions of functional consequences. Results Variants of interest were identified in 86 genes, 63.4% of our cohort. Seventy-one of these have been previously associated with SIDS/SUID/SUDP. Forty-three can be characterized as cardiac genes and are related to cardiomyopathies, arrhythmias, and other conditions. Variants in 22 genes were associated with neurologic functions. Variants were also found in 13 genes reported to be pathogenic for various systemic disorders. Variants in eight genes are implicated in the response to hypoxia and the regulation of reactive oxygen species (ROS) and have not been previously described in SIDS/SUID/SUDP. Seventy-two infants met the triple risk hypothesis criteria (Figure 1). Conclusion Our study confirms and further expands the list of genetic variants associated with SUID. The abundance of genes associated with heart disease and the discovery of variants associated with the redox metabolism have important mechanistic implications for the pathophysiology of SUID.
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Glinge C, Rossetti S, Oestergaard LB, Stampe NK, Lynge TH, Skals R, Winkel BG, Lodder EM, Bezzina CR, Gislason G, Banner J, Behr ER, Torp-Pedersen C, Jabbari R, Tfelt-Hansen J. Risk of Sudden Infant Death Syndrome Among Siblings of Children Who Died of Sudden Infant Death Syndrome in Denmark. JAMA Netw Open 2023; 6:e2252724. [PMID: 36696110 DOI: 10.1001/jamanetworkopen.2022.52724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
IMPORTANCE Sudden infant death syndrome (SIDS) remains a leading cause of death during the first year of life. The etiology of SIDS is complex and remains largely unknown. OBJECTIVE To evaluate whether siblings of children who died of SIDS have a higher risk of SIDS compared with the general pediatric population. DESIGN, SETTING, AND PARTICIPANTS This register-based cohort study used Danish nationwide registers. Participants were all infants (<1 year) in Denmark between January 1, 1978, and December 31, 2016, including siblings of children who died of SIDS. Siblings were followed up from the index cases' date of SIDS, date of birth, or immigration, whichever came first, and until age 1 year, emigration, developing SIDS, death, or study end. The median (IQR) follow-up was 1 (1-1) year. Data analysis was conducted from January 2017 to October 2022. MAIN OUTCOMES AND MEASURES Standardized incidence ratios (SIRs) of SIDS were calculated with Poisson regression models relative to the general population. RESULTS In a population of 2 666 834 consecutive births (1 395 199 [52%] male), 1540 infants died of SIDS (median [IQR] age at SIDS, 3 [2-4] months) during a 39-year study period. A total of 2384 younger siblings (cases) to index cases (first sibling with SIDS) were identified. A higher rate of SIDS was observed among siblings compared with the general population, with SIRs of 4.27 (95% CI, 2.13-8.53) after adjustment for sex, age, and calendar year and of 3.50 (95% CI, 1.75-7.01) after further adjustment for mother's age (<29 years vs ≥29 years) and education (high school vs after high school). CONCLUSIONS AND RELEVANCE In this nationwide study, having a sibling who died of SIDS was associated with a 4-fold higher risk of SIDS compared with the general population. Shared genetic and/or environmental factors may contribute to the observed clustering of SIDS. The family history of SIDS should be considered when assessing SIDS risk in clinical settings. A multidisciplinary genetic evaluation of families with SIDS could provide additional evidence.
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Affiliation(s)
- Charlotte Glinge
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical and Experimental Cardiology, Heart Centre, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Sára Rossetti
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Louise Bruun Oestergaard
- Department of Cardiology, Copenhagen University Hospital-Herlev and Gentofte, Copenhagen, Denmark
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | - Niels Kjær Stampe
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Thomas Hadberg Lynge
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Regitze Skals
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | - Bo Gregers Winkel
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Elisabeth M Lodder
- Department of Clinical and Experimental Cardiology, Heart Centre, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Connie R Bezzina
- Department of Clinical and Experimental Cardiology, Heart Centre, Amsterdam Cardiovascular Sciences, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Gunnar Gislason
- Department of Cardiology, Copenhagen University Hospital-Herlev and Gentofte, Copenhagen, Denmark
- The Danish Heart Foundation, Copenhagen, Denmark
| | - Jytte Banner
- Department of Forensic Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Elijah R Behr
- Cardiology Clinical Academic Group, Cardiology Section, St George's, University of London, London, United Kingdom
- St George's University Hospitals NHS Foundation Trust, London, United Kingdom
- Mayo Clinic Healthcare, London, United Kingdom
| | - Christian Torp-Pedersen
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
- Department of Cardiology, North Zealand University Hospital, Hillerød, Denmark
- Department of Public Health, University of Copenhagen, Denmark
| | - Reza Jabbari
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Jacob Tfelt-Hansen
- Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Forensic Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
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Bryson LJ, Joss S. How to use genetic testing after sudden infant death syndrome. Arch Dis Child Educ Pract Ed 2022; 107:383-385. [PMID: 33436404 DOI: 10.1136/archdischild-2020-320835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/09/2020] [Accepted: 12/10/2020] [Indexed: 11/04/2022]
Affiliation(s)
| | - Shelagh Joss
- West of Scotland Genetics Service, Queen Elizabeth University Hospital, Glasgow, UK
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Sudden Infant Death Syndrome: Beyond Risk Factors. Life (Basel) 2021; 11:life11030184. [PMID: 33652660 PMCID: PMC7996806 DOI: 10.3390/life11030184] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/19/2021] [Accepted: 02/22/2021] [Indexed: 12/12/2022] Open
Abstract
Sudden infant death syndrome (SIDS) is defined as "the sudden death of an infant under 1 year of age which remains unexplained after thorough investigation including a complete autopsy, death scene investigation, and detailed clinical and pathological review". A significant decrease of SIDS deaths occurred in the last decades in most countries after the beginning of national campaigns, mainly as a consequence of the implementation of risk reduction action mostly concentrating on the improvement of sleep conditions. Nevertheless, infant mortality from SIDS still remains unacceptably high. There is an urgent need to get insight into previously unexplored aspects of the brain system with a special focus on high-risk groups. SIDS pathogenesis is associated with a multifactorial condition that comprehends genetic, environmental and sociocultural factors. Effective prevention of SIDS requires multiple interventions from different fields. Developing brain susceptibility, intrinsic vulnerability and early identification of infants with high risk of SIDS represents a challenge. Progress in SIDS research appears to be fundamental to the ultimate aim of eradicating SIDS deaths. A complex model that combines different risk factor data from biomarkers and omic analysis may represent a tool to identify a SIDS risk profile in newborn settings. If high risk is detected, the infant may be referred for further investigations and follow ups. This review aims to illustrate the most recent discoveries from different fields, analyzing the neuroanatomical, genetic, metabolic, proteomic, environmental and sociocultural aspects related to SIDS.
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Schulze-Bahr E, Dettmeyer RB, Klingel K, Kauferstein S, Wolf C, Baba HA, Bohle RM, Gebauer R, Milting H, Schmidt U, Meder B, Rieß O, Paul T, Bajanowski T, Schunkert H. Postmortale molekulargenetische Untersuchungen (molekulare Autopsie) bei kardiovaskulären und bei ungeklärten Todesfällen. KARDIOLOGE 2021. [DOI: 10.1007/s12181-020-00438-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Ferrante L, Opdal SH, Nygaard V. No association to sudden infant death syndrome detected by targeted amplicon sequencing of 24 genes. Acta Paediatr 2020; 109:2636-2640. [PMID: 32271962 DOI: 10.1111/apa.15295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/27/2020] [Accepted: 03/31/2020] [Indexed: 11/28/2022]
Abstract
AIM The aim was to identify genetic variants associated with sudden infant death syndrome (SIDS) that can cause disease or introduce vulnerability. Genes reported in a previous SIDS study to have altered messenger ribonucleic acid (mRNA) expression in SIDS were investigated. METHODS Samples from 81 SIDS (56 male/28 female) with a median age of 4 months (range 0.75-9 months) were analysed using Illumina TruSeq custom amplicon for 24 selected genes. Samples were collected from autopsy at Oslo university hospital from children whom died suddenly and unexpectedly from 1988 to 2006. The controls were the germline variation database, Norgene (no description of cases available). RESULTS After filtering for rare variants, there were a total of 38 variants in the 81 SIDS cases and 462 variants in the 789 controls. After the filtration and curation steps, we found 36 rare variants. The overall occurrence of rare variants for all the SIDS samples was lower than for the Norgene population. CONCLUSION There was no association between rare variants in the included genes and SIDS. Although not statistically significant, two of the SIDS cases had a rare variant in the MyD88 gene: rs746651350, rs200424253.
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Affiliation(s)
- Linda Ferrante
- Department of Forensic Sciences Section of Forensic Pathology and Clinical Forensic Medicine Oslo of University Hospital Oslo Norway
| | - Siri H. Opdal
- Department of Forensic Sciences Section of Forensic Pathology and Clinical Forensic Medicine Oslo of University Hospital Oslo Norway
| | - Vegard Nygaard
- Department of Core Facilities Oslo University Hospital Oslo Norway
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Khan A, Wallace SS, Sampayo EM, Falco C. Caregivers' Perceptions and Hospital Experience After a Brief Resolved Unexplained Event: A Qualitative Study. Hosp Pediatr 2019; 9:508-515. [PMID: 31235529 DOI: 10.1542/hpeds.2018-0220] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND AND OBJECTIVES The American Academy of Pediatrics published guidelines for evaluation and management of lower-risk infants for a brief resolved unexplained event (BRUE). The guideline identified gaps in knowledge related to caregiver satisfaction, anxiety, and family-centered educational strategies to improve caregiver experience and patient outcomes. The objective of this study was to understand caregivers' experience with hospitalization for infants with BRUE, including their perception of the hospital stay, the diagnosis of BRUE, and their feelings toward the upcoming discharge from the hospital. METHODS We conducted a qualitative study using semistructured interviews with caregivers of infants aged 0 to 12 months who were admitted to a quaternary care children's hospital for a BRUE. Interviews were conducted within 24 hours of discharge. Two investigators coded transcripts and identified themes using consensus. RESULTS Eighteen caregivers of 13 infants were interviewed. No infants met criteria for being low risk according to the American Academy of Pediatrics guidelines. The coding scheme produced 3 major themes. First, parents felt reassured by hospital monitoring, diagnostic evaluation, and staff support in the hospital. Second, parents felt unsettled by the uncertainty of the child's condition and whether BRUE's "unexplainable" quality is understood as being part of normal infant behavior. Third, these themes manifested as conflicting emotions about caregivers' readiness for discharge. CONCLUSIONS Although hospital monitoring may provide reassurance for some caregivers, they continue to struggle with the uncertainty of the diagnosis. Caregiver perspectives can inform physicians' strategies to improve hospital experience and discharge readiness.
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Affiliation(s)
| | | | - Esther M Sampayo
- Pediatric Emergency Medicine, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
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Vincenzi FF. Sudden Unexpected Death and the Mammalian Dive Response: Catastrophic Failure of a Complex Tightly Coupled System. Front Physiol 2019; 10:97. [PMID: 30886584 PMCID: PMC6389676 DOI: 10.3389/fphys.2019.00097] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Accepted: 01/25/2019] [Indexed: 01/02/2023] Open
Abstract
In tightly coupled complex systems, when two or more factors or events interact in unanticipated ways, catastrophic failures of high-risk technical systems happen rarely, but quickly. Safety features are commonly built into complex systems to avoid disasters but are often part of the problem. The human body may be considered as a complex tightly coupled system at risk of rare catastrophic failure (sudden unexpected death, SUD) when certain factors or events interact. The mammalian dive response (MDR) is a built-in safety feature of the body that normally conserves oxygen during acute hypoxia. Activation of the MDR is the final pathway to sudden cardiac (SCD) in some cases of sudden infant death syndrome (SIDS), sudden unexpected death in epilepsy (SUDEP), and sudden cardiac death in water (SCDIW, fatal drowning). There is no single cause in any of these death scenarios, but an array of, unanticipated, often unknown, factors or events that activate or interact with the mammalian dive reflex. In any particular case, the relevant risk factors or events might include a combination of genetic, developmental, metabolic, disease, environmental, or operational influences. Determination of a single cause in any of these death scenarios is unlikely. The common thread among these seemingly different death scenarios is activation of the mammalian dive response. The human body is a complex tightly coupled system at risk of rare catastrophic failure when that "safety feature" is activated.
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Affiliation(s)
- Frank F. Vincenzi
- Department of Pharmacology, University of Washington, Seattle, WA, United States
- Pharmacological Information and Consultation Service, Arlington, WA, United States
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