Measurement and comparison of immune diversity by high-throughput sequencing
First Claim
1. A method of identifying an antigen-specific antibody lineage in a subject exposed to the antigen, comprising,sequencing nucleic acid from a biological sample obtained from the subject after exposure to the antigen, via high throughput sequencing, to determine CDR3 nucleic acid sequences, representing at least a portion of the subject'"'"'s antibody repertoire;
- performing a linkage analysis of the CDR3 nucleic acid sequences to establish linked CDR3 sequences, wherein two CDR3 sequences are in a linkage if they have the same V and J assignment and no more than one amino acid difference in the CDR3 region;
grouping CDR3 sequences into a plurality of lineages, wherein individual lineages of the plurality comprise (i) identical CDR3 sequences and (ii) CDR3 sequences that are associated with one another through one or more linkages; and
comparing the CDR3 sequences in the plurality of lineages with a CDR3 sequence of an antigen-specific antibody obtained from the subject to determine the presence of the antigen-specific antibody lineage.
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Abstract
High-throughput long read sequencing is used to perform immunogenomic characterization of expressed antibody repertoires in the context of vaccination. Informatic analysis allows global characterizations of isotype distributions, determination of the lineage structure of the repertoire and measure age and antigen related mutational activity. Global analysis of the immune system'"'"'s clonal structure provides direct insight into the effects of vaccination and provides a detailed molecular portrait of age-related effects.
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Citations
8 Claims
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1. A method of identifying an antigen-specific antibody lineage in a subject exposed to the antigen, comprising,
sequencing nucleic acid from a biological sample obtained from the subject after exposure to the antigen, via high throughput sequencing, to determine CDR3 nucleic acid sequences, representing at least a portion of the subject'"'"'s antibody repertoire; -
performing a linkage analysis of the CDR3 nucleic acid sequences to establish linked CDR3 sequences, wherein two CDR3 sequences are in a linkage if they have the same V and J assignment and no more than one amino acid difference in the CDR3 region; grouping CDR3 sequences into a plurality of lineages, wherein individual lineages of the plurality comprise (i) identical CDR3 sequences and (ii) CDR3 sequences that are associated with one another through one or more linkages; and comparing the CDR3 sequences in the plurality of lineages with a CDR3 sequence of an antigen-specific antibody obtained from the subject to determine the presence of the antigen-specific antibody lineage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification