Holotype HLA

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Agenda   § 

Introducing...  Holotype  HLA  

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Holotype  HLA  Assay  Advantages

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HLA  Twin  So8ware  Overview    (live  demo)

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Locus  Coverage  &  Throughput  Scalability  (within  demo)    

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Summary  &  Benefits  

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Q&A  

 

 

Introduc6on  to  Holotype  HLA™   Holotype  HLA  is  a  combinaFon  Assay  and  So8ware  product  for   the  comprehensive  gene  amplificaFon  of  mulFple  HLA  loci,   and  sequencing  on  the  Illumina  MiSeq.  

NGS  Assay                                        +                                NGS  So8ware  

Omixon  Holotype  HLA  –  5  loci  (Assay)   5  loci  –  HLA-­‐A,  B,  C,  DQB1  and  DRB1  

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X4  –  16/5   96  Indexes   5+1  configuraFon                       (per  locus  indexing)  

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2  technical  replicates  per   amplicon   2  genotyping  algorithms  

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X2  –  96/5   96  Indexes   Fully  pooled  configuraFon   (per  sample  indexing)   1  technical  replicate  per   amplicon   2  genotyping  algorithms  

Omixon  Holotype  HLA  –  7  loci  (Assay)   7  loci  –  HLA-­‐A,  B,  C,  DRB1,  DPB1,  DQA1  and  DQB1  

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X2  –  24/7   24  Indexes   Fully  pooled  configuraFon   (per  sample  indexing)  

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1  technical  replicate  per   amplicon   2  genotyping  algorithms  

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X2  –  96/7   96  Indexes   Fully  pooled  configuraFon   (per  sample  indexing)   1  technical  replicate  per   amplicon   2  genotyping  algorithms  

LR-­‐PCR  Amplifica6on  Strategy   Full  gene  characteriza6on   HLA-­‐A,  B,  C,  and  DQA1  (Example  is  HLA-­‐B)   5’  UTR   1  

2  

3  

4  

5  

6  

7  

3’  UTR  

HLA-­‐DQB1   5’  UTR   1  

2  

3  

4

5  

6   3’  UTR  

Key  region  characteriza6on   HLA-­‐DRB1   5’  UTR   1  

2  

3  

4

5

6 3’  UTR  

HLA-­‐DPB1   5’  UTR   1  

2  

3  

4

5 3’  UTR  

NGS  Library  Prepara6on  Simplicity   gDNA   FragmentaFon  

End  Repair  

Adaptor  LigaFon  

Paired-­‐End  Sequencing  

Single-­‐End  Reads   Read  1   Template  

Paired-­‐End  Reads   Read  1   Template  

Read  2  

Sequence   from   the   paired   reads   originate   from   the   same   template,   and   therefore   are   phased   with   each   other  

Effect  of  Varying  Insert  Sizes  among  Paired  Reads   Read Length 250 bases Read Length 250 bases

Overlap of 100 bases

Fragment  Length  400  bp   Read Length 250 bases

Read Length 250 bases

No Overlap

Fragment  Length  500  bp   Read Length 250 bases

Read Length 250 bases

No sequence for 100 bases

Fragment  Length  600  bp  

Op6mized  Size  Selec6on   Fragment  Size  

Number  of  read  pairs  referring  to  fragments  within  the  specified  length  interval  

Long  Distance  Phasing   B*07:02:01  

T  

T  

A  G  

T   A  

C  

T  

B*41:01  

C  

C  

T  C  

C   G  

T  

G  

Allelic  Balance    

The   opFmized   assay   design   achieves   allelic   balance   across   all   loci   for   accurate   HLA   allele   determinaFon   without   bias   towards   easy-­‐to-­‐sequence   genomic  regions.  

Even  Coverage   Across  a  locus  

Across  loci  within  a  sample  

Between  samples  

Omixon  HLA  Twin™  (So]ware)   § 

Preconfigured  Holotype  HLA-­‐specific  sedngs  

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Automated  genotyping  a8er  MiSeq  run  

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Two  algorithms  for  determining  HLA  genotypes   –  Consensus  Genotyping  (Assembly)     –  StaFsFcal  Genotyping  (Alignment  to  IMGT/HLA)  

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Traffic  light  system  for  data  interpretaFon  and   workflow  management   PASSED   WARNING   FAILED  

The  Traffic  Light  System  (Overview)  

The  Traffic  Light  System  

Live  Demo   § 

Live  Demo  of  Holotype  HLA  Twin™  

Benefits  of  Holotype  HLA  Assay   § 

LR-­‐PCR  for  fully  characterized  loci    

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Easy  Library  PreparaFon    

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Variable-­‐insert  paired-­‐end  sequencing  for  fully  phased   allele  variaFon  

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High-­‐throughput  NGS  on  a  MiSeq  

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Unambiguous  genotyping  

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No  reflexive  tesFng  

Benefits  of  HLA  Twin  So]ware   § 

Accurate  genotyping  with  two  orthogonal  algorithms    

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No  manual  intervenFon  for  good  quality  data  

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InformaFve  quality  control  metrics  for  confidence  in   genotyping  results  

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Traffic  Light  System  for  easy  interpretaFon   –  Novel  allele  detecFon   –  Null  alleles  always  resolved  (splice  variant  and  intronic)  

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Export  genotypes  or  consensus  sequence  for  reporFng  

Holotype  HLA  vs  Compe6tors   Competing Products

Holotype HLA

Occasional allele dropout

Very rare allele dropout

6+ hours hands on time

About 4 hours hands on time

Up to 24 samples per run

96 samples per run

Uneven coverage, dips in coverage at key exons

Deep & even coverage across every exon for each locus

Allele imbalance

Balanced coverage depth for both alleles at each locus

One algorithm, requires technician for every allele call

Fully automated genotyping with two algorithms

High rates of ambiguity

0.2% ambiguity

The  Omixon  Website  

The   Omixon  Academy   Omixon'('Academy'

Ques6ons?  

[email protected]     +1  (617)  500  0790