translating rapid whole genome sequences into precision ... 9th annual... · translating rapid...
TRANSCRIPT
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Translating Rapid Whole Genome Sequences into Precision Medicine for Infants in Intensive Care Units Stephen F. Kingsmore, MB, ChB, DSc, FRCPath, President, Rady Children’s Institute for Genomic Medicine, San Diego
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"Tonight, I'm launching a new Precision Medicine Initiative....to give all of us access to the personalized information we need to keep ourselves and our families healthier….a new era of medicine….that delivers the right treatment at the right time."
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National Adoption of Genomic Medicine
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14% of US newborns admitted to a NICU
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Rationale
Economics Work: Cost of care
$4000 per day
Leading cause of Death in NICU & PICU
Conventional testing
Too slow To guide
care
Diagnosis of 8250 Genetic Diseases in
NICUs
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Conventional Testing Too Slow For Optimal NICU Outcomes
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Days of Life
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Why single gene diseases?
• Simple, deterministic genetics: – 1 or 2 pathogenic variants in/near 1 gene that causes
disease with symptoms similar to that in the infant = necessary and sufficient
• 50yr medical genetic infrastructure – Medical geneticists, genetic counselors, public health
services • Orphan drug companies, gene therapies
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Baby CMH487:
acute liver failure
00:00
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Gap 2: Making a differential diagnosis: Complexity of Genetic Diseases in Symptomatic Infants
Typical presentations of 4,645 known genetic diseases
Partial presentations of 4,645 known genetic diseases
Atypical presentations of 4,645 known genetic diseases
20+ novel genetic diseases discovered per month
Genetic disease mimicking a non-genetic disease
Genetic disease complicating a non-genetic disease
Two concomitant genetic diseases
3,643 named, uncloned genetic diseases
Stereotyped presentations due
to partially developed organ
systems and homeostatic
responses
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April 10, 2013 Baby CMH487
00:00
Hydrocele testis Infra-orbital crease Maternal diabetes Low-set, posteriorly rotated ears Feeding difficulties in infancy Ventilator dependence Single umbilical artery Cholestasis Thrombocytopenia Prolonged partial thromboplastin time Prolonged prothrombin time Chronic lung disease Hypertelorism Thoracolumbar scoliosis Bronchodysplasia Omphalocele Chin dimple Duplicated collecting system Ventricular hypertrophy Nevus flammeus Gastroesophageal reflux
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12,000 HPO terms x
5,500 genetic diseases x
3,500 disease genes
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April 10, 2013 Baby CMH487
00:00
HP:0009800 Maternal diabetes HP:0001539 Omphalocele HP:0008872 Feeding difficulties in infancy HP:0006533 Bronchodysplasia HP:0005946 Ventilator dependence HP:0006528 Chronic lung disease HP:0002020 Gastroesophageal reflux HP:0002944 Thoracolumbar scoliosis HP:0000081 Duplicated collecting system HP:0000034 Hydrocele testis HP:0001195 Single umbilical artery HP:0100876 Infra-orbital crease HP:0000368 Low-set, posteriorly rotated ears HP:0000316 Hypertelorism HP:0010751 Chin dimple HP:0001052 Nevus flammeus HP:0001396 Cholestasis HP:0001873 Thrombocytopenia HP:0003645 Prolonged partial thromboplastin time HP:0008151 Prolonged prothrombin time HP:0001714 Ventricular hypertrophy
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Parents gave consent
00:00
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Blood sample from
mum, dad and baby
00:00
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San Diego Synergy: Illumina + Edico + Rady Children’s
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Transport to Institute
00:02
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Robot isolates genomic DNA
01:00
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Robot prepares DNA for sequencing
06:00
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18 hour genome sequencing
24:30
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Each of my 37 trillion cells contains 2 genomes of 3.2 billion DNA letters
We are fearfully and wonderfully made. Psalm 139
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Scope: Comparison of Short Read Genome and Exome Sequencing Pros of Genomes:
• One day faster • Samples 90% of genome • Reasonably good deletion
structural variant detection
Pros of Exomes: • Cost ¼ that of genomes
Disadvantages of both: • Limited phasing; requires trios • Don’t detect insertion structural
variation or repeat expansions
Gene
Whole Genome Sequence Whole
Exome Sequence
= 2%
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Cost and Time-to-Result of Genomic Sequencing Options
48+ 48+
40X 4000 Trio Genome 48+ Hr 2x80nt
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Gap 4:
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24:30 Infant CMH487
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9 TB/day 6GB/sec
3 TB/day 600 Mb/sec
5TB/day 1 GB/sec
Remote backup
Genome sequencers 24 x 7, 365 days/yr
High performance NAS
Compute cluster
In-house researchers
Single monitoring dashboard 75 TB
10 Gbps
10 Gbps 10 Gbps
Sim
ulta
neou
s writ
es
500TB
100 cores
1TB/day
External Collaborators
500TB Public cloud
AWS Google Azure
25 yr archival 1 Gbps http
Single global name space
Replication
2 yrs worth storage Local object storage
1 Gbps http
Compute & Storage
FASTQ
BAM FASTQ
Variant database
GPFS
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24:45 Infant CMH487
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25:00 Infant CMH487
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Improved Analytic performance of WGS (nucleotide variants; not structural variants)
SampleYeild (GB)
Site Pipeline
A
DRAGENGSNAP/GATK-1.6/noVQSRDRAGENGSNAP/GATK-3.2/noVQSR
Essex
CMH
NA12878
NA12878 65a
143
Analytic Sensitivity
Analytic Specificity
99.93% 99.87%99.54% 98.57%99.42% 99.46%97.29% 95.35%
45X
20X
Coverage
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25:01 Infant CMH487
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Hemoglobin-β DNA code
Normal red blood cell
Does this DNA letter change cause a genetic disease?
Sickle cell
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Variant pathogenicity categories
Genet Med. 2015 Mar 5. Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of ACMG and AMP. Richards S, et al.
Very Strong
Null variant (nonsense, frameshift, ±1 or 2 splice site position, initiation codon, exon deletion) in gene where LOF known to cause disease
Strong • Same amino acid change as previously established pathogenic variant • De novo in a patient with the disease and no family history • Functional studies show damaging effect on the gene • Prevalence in affected individuals significantly greater than controls
Moderate • Located in mutational hot spot/functional domain without benign variation • Extremely low frequency in Exome Sequencing or 1000 Genomes Projects • For recessive disorders, detected in trans with a pathogenic variant • Protein length changed by in-frame indel in nonrepeat region or stop-loss • Novel missense at amino acid where different missense known to be pathogenic • Assumed de novo, but without confirmation of paternity and maternity
Supporting • Cosegregation with disease in multiple affected family members in gene known to cause disease
• Missense variant in gene with low rate of benign missense variants and where missense variants commonly cause disease
• Multiple computational tools call deleterious • Phenotype highly specific for disease with single genetic etiology • Reputable source reports as pathogenic, but unpublished
Category CRITERIA
Pathogenic 1VS + (1S or 2M/Supp) 2 Strong 1S + 3M or (2M+2Supp)
Likely Pathogenic
1 VS/S + 1 M 1 S + (1 M or 2 Supp) 3 M 2 M + 2 Supp 1 M + 4 Supp
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25:41 Infant CMH487
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341 Possible Diagnoses
25:42 Computer-Aided Comprehensive Differential Diagnosis
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Infant CMH487
Diagnosis
25:43
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• Perforin 1 heterozygous c.272C>T [p.Ala91Val] P, supported by functional studies
• Perforin 1 heterozygous c.1310C>T [p.Ala437Val] LP, supported by case-control studies
• Diagnosis: Hemophagocytic lymphohistiocytosis type 2
26:00
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• Confirmatory testing
• Precision Medicine: – Meds. D/Cd – IV Ig and steroids
Hemophagocytic Lymphohistiocytosis Diagnostic Criteria (need 5) Present in CMH487 Fever No Hepatomegaly or splenomegaly Modest (1) 2 cytopenias: hemoglobin<9 g/dL, platelets <100,000/mm3, ANC <1000 Yes (2) Serum ferritin >500 ng/mL Yes (3) Serum triglyceride >265 mg/dL or fibrinogen <150 mg/mL Yes (4) Absent/decreased natural killer cell assay Yes, after Dx (5) Soluble IL2 receptor (CD25) >2,400 units/mL Not done Hemophagocytosis without malignancy Not done
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Outcome • Coagulopathy resolved on d. 7 • 7 surgeries for correction of congenital anomalies • He is now 32 months old, normal liver function • 72 quality adjusted life years saved
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Diagnostic Utility: Meta-Analysis of 9 Studies of Short Read Exome & Genome Sequencing in Children
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1. Overall Diagnosis Rate = 28% = most effective method for making molecular diagnosis of
childhood genetic disease
Chromosomal microarray (current 1st tier test for genetic disease Dx): diagnostic rate ~15%
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3. de novo Mutations: The most common mechanism of genetic disease diagnosis
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Willig LK, et al. Science Trans. Med. April 2015
35 NICU / PICU infants with likely genetic disease (Kansas City)
57% (20) By rapid WGS
9% (3) By standard methods
Molecular Diagnosis
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Stark Z, et al. Genetics in Medicine 3/3/2016
80 infants under care for likely genetic disease (Melbourne)
14% (11) By standard methods
58% (46) By Exome Seq
Molecular Diagnosis
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Explore use of genomic information for broadening understanding of diseases identified in the newborn period
Newborn Sequencing In Genomic medicine and public HealTh
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65 Randomized
NICU infants of age < 4 months with clinical features suggesting a genetic disease
33 Infants with Standard Tests
32 Standard Tests and Trio Rapid WGS
NSIGHT Randomized Controlled Study of rapid WGS in NICU infants
5 Cross-overs
Molecular Diagnosis 5 (15%) 13 (41%) p<0.05
Study terminated early due to loss of equipoise of neonatologists
Time to Diagnosis 65 days 16 days
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2.9 QALYs per family tested
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YES: 2.9 QALYs per newborn genome Cost per QALY: $3500
Kansas City Melbourne Change in care 13 (37%) 16 (20%) Life-saving treatment 1 (3%) 2 (3%) Major morbidity avoided 3 (9%) 1 (1%) Major Procedure Change 3 (9%) 4 (5%) Palliative Care Guidance 6 (17%) 0 (0%) Medication Change 4 (11%) 8 (10%) NICU stay decreased by >1 month 1 (3%) 0 (0%) Parent or sibling diagnosed 1 (3%) 10 (13%) Diet Change 2 (6%) 2 (2%) Complication monitoring 1 (3%) 11 (14%)
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CMH5033, a 3-week-old male with isolated, symptomatic atrial flutter, and
his parents
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CMH5033: 3 week old male with atrial tachydysrhythmias
DOL2: Local NICU; Atrial tachycardia; Premature atrial contractions; Some non-conducted P waves; Heart rate normal; Discharged DOL7. 2 weeks old: Outpatient; tachypneic, gained 1 oz. EKG: Atrial tach 190-230. Some non-conducted P waves. Admitted CMH NICU. Episodes atrial flutter 217 bpm with pallor, thready pulse. Cardioverted x 2. ECG: 6/2: Vent.Rate:164BPM, Atrial Rate:178BPM, Normal P-R Interval, QRS Interval and QTc. Rx: Amiodarone, esmolol, flecainide. ECHO: Structurally normal. Patent foramen ovale. Ectopic beats. During sinus beats, LV ejection fraction 52%. During ectopic beats, abnormal septal motion. Amiodarone and esmolol D/Cd after flecainide therapeutic. 3 weeks old: Enrolled for WGS; Hemodynamically stable; Eating well; Discharged.
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Trio Whole Genome Sequencing
• Day 1: Enrolled • Day 2: Blood samples from trio • Day 4: Finished 2 x 100 nt, HiSeq 2500, proband, 108GB &
mother 109GB • Day 4: Proband VCF analyzed • Day 5: Finished father WGS (89GB), re-analysis of trio • Day 9: Laboratory director completed analysis/interpretation
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Automated Differential Diagnosis • HPO terms: atrial flutter (mandatory), AFib (present),
multifocal atrial tachycardia (present), 1 gene (SCN5A) • Phenomizer: terms present: P<0.05; 259 genes • 17 OMIM AFib loci • These genes harbor 1 possibly pathogenic variant in the
proband with minor allele frequency<0.5% Coordinates (GRCh37) Locus Locus name MIM# Phenotype Phenotype# 12:21950322-22094796 ABCC9, ATFB12 ATP-binding cassette, subfamily C, member 9 (sulfonylurea receptor 2) 601439 Atrial fibrillation, familial, 12 614050 10:70600000-105800000 ATFB1 Atrial fibrillation, familial, 1 608583 Atrial fibrillation, familial, 1 608583 6:75900000-105500000 ATFB2 Atrial fibrillation, familial, 2 608988 Atrial fibrillation, familial, 2 608988 4:107700000-114100000 ATFB5 Atrial fibrillation, familial, 5 611494 {Atrial fibrillation, familial, 5} 611494 16:66700000-74100000 ATFB8 Atrial fibrillation, familial, 8 613055 Atrial fibrillation, familial, 8 613055 1:147228331-147253164 GJA5, ATFB11 Gap junction protein, alpha-5, 40kD (connexin 40) 121013 Atrial standstill, digenic (GJA5/SCN5A) 108770 1:147228331-147253164 GJA5, ATFB11 Gap junction protein, alpha-5, 40kD (connexin 40) 121013 Atrial fibrillation, familial, 11 614049 12:5153084-5155953 KCNA5, ATFB7 Potassium voltage-gated channel, shaker-related subfamily, member 5 176267 Atrial fibrillation, familial, 7 612240 21:35736322-35743439 KCNE2, ATFB4 Potassium voltage-gated channel, Isk-related family, member 2 603796 Atrial fibrillation, familial, 4 611493 17:68164756-68176188 KCNJ2, ATFB9 Potassium channel, inwardly rectifying, subfamily J, member 2 600681 Atrial fibrillation, familial, 9 613980 11:2466220-2870339 KCNQ1, ATFB3 Potassium voltage-gated channel, KQT-like subfamily, member 1 607542 Atrial fibrillation, familial, 3 607554 1:11905765-11907839 NPPA, ATFB6 Natriuretic peptide precursor A 108780 Atrial standstill 2 615745 1:11905765-11907839 NPPA, ATFB6 Natriuretic peptide precursor A 108780 Atrial fibrillation, familial, 6 612201 5:37291734-37371227 NUP155, ATFB15 Nucleoporin, 155kD 606694 ?Atrial fibrillation 15 615770 19:35521554-35531352 SCN1B, ATFB13 Sodium channel, voltage-gated, type I, beta polypeptide 600235 Atrial fibrillation, familial, 13 615377 11:118033518-118047336 SCN2B, ATFB14 Sodium channel, voltage-gated, type II, beta polypeptide 601327 Atrial fibrillation, familial, 14 615378 11:123499894-123525314 SCN3B, ATFB16 Sodium channel, voltage-gated, type III, beta subunit 608214 Atrial fibrillation, familial, 16 613120 11:118004091-118023629 SCN4B, ATFB17 Sodium channel, voltage-gated, type IV, beta subunit 608256 Atrial fibrillation, familial, 17 611819 3:38589552-38691163 SCN5A, ATFB10 Sodium channel, voltage-gated, type V, alpha polypeptide 600163 Atrial fibrillation, familial, 10 614022
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IGV: Proband, 3:38591853-38591853 A > G Good coverage, bidirectional reads call variant, clean alignments
Filters: Potentially pathogenic variant(s) with allele frequency <0.5% in genes assoc. with atrial fibrillation: 1
heterozygous variant
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Inherited from father (As far as we know he is unaffected)
Proband
Mother
Father
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Complication: There are 9 OMIM SCN5A Phenotypes
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1. Non-synonymous hgvs_c: NM_000335.4:c.6007T>C, hgvs_p: NP_000326.2:p.Phe2003Leu hgvs_c: NM_001099404.1:c.6010T>C, hgvs_p: NP_001092874.1:p.Phe2004Leu hgvs_c: NM_001099405.1:c.5956T>C, hgvs_p: NP_001092875.1:p.Phe1986Leu hgvs_c: NM_001160160.1:c.5911T>C, hgvs_p: NP_001153632.1:p.Phe1971Leu hgvs_c: NM_001160161.1:c.5848T>C, hgvs_p: NP_001153633.1:p.Phe1950Leu hgvs_c: NM_198056.2:c.6010T>C, hgvs_p: NP_932173.1:p.Phe2004Leu In silico tools largely predict to be benign SIFT: tolerated (0.65) MutPred: Medium risk Grantham score: 22 (range 5 – 215) LRT: Neutral FATHMM: Damaging (-3.6) 2. Occurs in a functional domain of the protein: Unstructured COOH terminus is involved in inactivation gating 5 variants in this region have physiologic phenotypes 3. Occurs in a 20 AA region that is well conserved; Albeit PolyPhen2 = benign (0.001), PhyloP 0.04 And, Dog and Chinchilla have leucine at this position
Support for Pathogenicity of 3:38,591,853-38,591,853A>G
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4. Allele frequency – rare, but not extremely low CMH MAF 0.24%, 11 het., 0 hom., / 4666 total alleles EVS MAF European American 0.31% ExAC MAF 0.20% dbSNP: rs41311117 MAF 0.14% 5. Reported in patients with sudden infant death syndrome, sudden cardiac death, Brugada syndrome, and in apparently healthy individuals…Oleson et al. Circ Cardiovasc Genet 2012 5:450-459 – F2004L father and proband had early onset AF 6. Altered electrophysiologic effects in 2 manuscripts Wang: “F2004L alone is not sufficient to evoke arrhythmia susceptibility, and other factors are probably needed for full pathophysiological expression” Bebarova: “We believe that the F2004L loss-of-function variant is a disease-associated mutant”. “…the question arises why the pathogenic potential of this SCN5A variant is so variable. Undoubtedly, modifier genes could play a role.”
Support for Pathogenicity of 3:38,591,853-38,591,853A>G
Wang et al. Circulation. 2007;115:368-376
Bebarova et al. Am J Physiol Heart Circ Physiol. 2008 Jul; 295(1): H48–H58.
Cells transfected CHO cells tsA201 cells Fast inactivation Impaired Recovery from inactivation Faster Delayed Slow inactivation Faster Persistent Na current Increased Decreased Steady-state inactivation Depolarizing voltage shift Peak Na current Unaltered Decreased
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Genet Med. 2015 Mar 5. Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of ACMG and AMP. Richards S, et al.
Very Strong Null variant (nonsense, frameshift, ±1 or 2 splice site position, initiation codon, exon deletion) in gene where LOF known to cause disease
Strong • Same amino acid change as previously established pathogenic variant • De novo in a patient with the disease and no family history • Functional studies show damaging effect on the gene • Prevalence in affected individuals significantly greater than controls
Moderate • Located in mutational hot spot/functional domain without benign variation • Extremely low frequency in Exome Sequencing or 1000 Genomes Projects • For recessive disorders, detected in trans with a pathogenic variant • Protein length changed by in-frame indel in nonrepeat region or stop-loss • Novel missense at amino acid where different missense known to be pathogenic • Assumed de novo, but without confirmation of paternity and maternity
Supporting • Cosegregation with disease in multiple affected family members in gene known to cause disease • Missense variant in gene with low rate of benign missense variants and where missense variants commonly
cause disease • Multiple computational tools call deleterious • Phenotype highly specific for disease with single genetic etiology • Reputable source reports as pathogenic, but unpublished
Category NEW CRITERIA
Pathogenic 1 VS + (1 S or 2 M/Supp) 2S 1S + (3M or 2M+2Supp)
Likely Pathogenic
1 VS/S + 1 M 1 S + (1 M or 2 Supp) 3 M 2 M + 2 Supp 1 M + 4 Supp
Interpretation 1: Likely benign (1 strong + 2 supporting) • BS1: Allele frequency greater than expected • BP6: LMM assertion is likely benign in Clinvar • BP4: In silico predictions Interpretation 2: Pathogenic (2 strong) • Functional studies show damaging effect on the gene • Prevalence in affected individuals significantly greater than controls
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Questions to be answered at the end of the presentation:
Based on the aggregate evidence, do you believe SCN5A p.Phe2004Leu is:
Pathogenic Likely Pathogenic Likely Benign Benign
1 2% 22 61% 13 36% 0 0%
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Questions to be answered at the end of the presentation:
Based on the aggregate evidence, do you believe that, in this case, SCN5A p.Phe2004Leu is:
Causative Likely causative A risk factor Unrelated
1 3% 10 37% 15 55% 1 3%
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Questions to be answered at the end of the presentation:
Based on these two answers, in this research study, would you report SCN5A p.Phe2004Leu as:
Diagnostic No report, since non-diagnostic Report, clinical correlation warranted
1 2% 8 19% 32 78%
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Summary
1. 15% of the 15% of babies admitted to ICUs may benefit from rapid genome sequencing
2. Case studies show WGS saved 2.9 QALYs per test in ICU/ICU infants 3. Clinical utility is multi-dimensional and requires novel multidisciplinary teams e.g.
for precision palliative care 4. Additional clinical trials are needed to define optimal methods and delineate
infants who will benefit 5. Systematic healthcare changes needed for broad adoption of genomic medicine in
ICU infants
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Proposal for the SADS Foundation • (Blame Jim Perry) • A randomized, controlled study of rapid WGS
as a first tier test in Code Blue children
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Support: Children’s Mercy Hospital
Rady Children’s Hosptial NICHD NHGRI NIDDK
The LORD is my creativity, Psalm 27
Josh Petrikin Laurel Willig Carol Saunders John Lantos Neil Miller Emily Farrow
Lance Prince MD PhD Gail Knight MD Farhad Imam MD PhD Nathaly Sweeney MD Nicole Coufman MD PhD Mallory Boutin Julie Ryu MD Cynthia Kuelbs MD George Chiang MD Lynn Byrd MD James Perry MD Amber Hildreth DO Jenni Friedman MD Jonathan Sebat PhD Tina Chambers PhD Albert Oriol Jeff Neul MD PhD Cyndi Kuelbs MD Lauge Farnaes MD PhD Bruce Barshop MD
Kevin Hall PhD James Richardson Kyle Farh MD Susan Tousi Severine Catreux Mike Ruehle John Reynders
Todd Laird Yan Ding MD Joe Gleeson MD PhD Michelle Clark PhD Julie Cakici RN Wendy Benson Ray Veeraraghavan PhD Matt Bainbrindge PhD Jennifer Azares Sergei Batalov PhD Vanessa Wertheim RN PhD 4 new folk Shareef Nahas PhD FACMG Shimul Chowdhury PhD FACMG David Dimmock MD FACMG Julie Reinke
Zornita Stark MD Sue White MD Tiong Tan MD
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The children are waiting….