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Public Clonotypes and Convergent Recombination Characterize the Naïve CD8(+) T-Cell Receptor Repertoire of Extremely Preterm Neonates
Respiratory support improvements have aided survival of premature neonates, but infection susceptibility remains a predominant problem. We previously reported that neonatal mice have a rapidly evolving T-cell receptor (TCR) repertoire that impairs CD8(+) T cell immunity. To understand the impact of...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5742125/ https://www.ncbi.nlm.nih.gov/pubmed/29312340 http://dx.doi.org/10.3389/fimmu.2017.01859 |
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author | Carey, Alison J. Hope, Jennifer L. Mueller, Yvonne M. Fike, Adam J. Kumova, Ogan K. van Zessen, David B. H. Steegers, Eric A. P. van der Burg, Mirjam Katsikis, Peter D. |
author_facet | Carey, Alison J. Hope, Jennifer L. Mueller, Yvonne M. Fike, Adam J. Kumova, Ogan K. van Zessen, David B. H. Steegers, Eric A. P. van der Burg, Mirjam Katsikis, Peter D. |
author_sort | Carey, Alison J. |
collection | PubMed |
description | Respiratory support improvements have aided survival of premature neonates, but infection susceptibility remains a predominant problem. We previously reported that neonatal mice have a rapidly evolving T-cell receptor (TCR) repertoire that impairs CD8(+) T cell immunity. To understand the impact of prematurity on the human CD8(+) TCR repertoire, we performed next-generation sequencing of the complementarity-determining region 3 (CDR3) from the rearranged TCR variable beta (Vβ) in sorted, naïve CD8(+) T cells from extremely preterm neonates (23–27 weeks gestation), term neonates (37–41 weeks gestation), children (16–56 months), and adults (25–50 years old). Strikingly, preterm neonates had an increased frequency of public clonotypes shared between unrelated individuals. Public clonotypes identified in preterm infants were encoded by germline gene sequences, and some of these clonotypes persisted into adulthood. The preterm neonatal naïve CD8(+) TCR repertoire exhibited convergent recombination, characterized by different nucleotide sequences encoding the same amino acid CDR3 sequence. As determined by Pielou’s evenness and iChao1 metrics, extremely preterm neonates have less clonality, and a much lower bound for the number of unique TCR within an individual preterm neonate, which indicates a less rich and diverse repertoire, as compared to term neonates, children, and adults. This suggests that T cell selection in the preterm neonate may be less stringent or different. Our analysis is the first to compare the TCR repertoire of naïve CD8(+) T cells between viable preterm neonates and term neonates. We find preterm neonates have a repertoire immaturity which potentially contributes to their increased infection susceptibility. A developmentally regulated, evenly distributed repertoire in preterm neonates may lead to the inclusion of public TCR CDR3β sequences that overlap between unrelated individuals in the preterm repertoire. |
format | Online Article Text |
id | pubmed-5742125 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-57421252018-01-08 Public Clonotypes and Convergent Recombination Characterize the Naïve CD8(+) T-Cell Receptor Repertoire of Extremely Preterm Neonates Carey, Alison J. Hope, Jennifer L. Mueller, Yvonne M. Fike, Adam J. Kumova, Ogan K. van Zessen, David B. H. Steegers, Eric A. P. van der Burg, Mirjam Katsikis, Peter D. Front Immunol Immunology Respiratory support improvements have aided survival of premature neonates, but infection susceptibility remains a predominant problem. We previously reported that neonatal mice have a rapidly evolving T-cell receptor (TCR) repertoire that impairs CD8(+) T cell immunity. To understand the impact of prematurity on the human CD8(+) TCR repertoire, we performed next-generation sequencing of the complementarity-determining region 3 (CDR3) from the rearranged TCR variable beta (Vβ) in sorted, naïve CD8(+) T cells from extremely preterm neonates (23–27 weeks gestation), term neonates (37–41 weeks gestation), children (16–56 months), and adults (25–50 years old). Strikingly, preterm neonates had an increased frequency of public clonotypes shared between unrelated individuals. Public clonotypes identified in preterm infants were encoded by germline gene sequences, and some of these clonotypes persisted into adulthood. The preterm neonatal naïve CD8(+) TCR repertoire exhibited convergent recombination, characterized by different nucleotide sequences encoding the same amino acid CDR3 sequence. As determined by Pielou’s evenness and iChao1 metrics, extremely preterm neonates have less clonality, and a much lower bound for the number of unique TCR within an individual preterm neonate, which indicates a less rich and diverse repertoire, as compared to term neonates, children, and adults. This suggests that T cell selection in the preterm neonate may be less stringent or different. Our analysis is the first to compare the TCR repertoire of naïve CD8(+) T cells between viable preterm neonates and term neonates. We find preterm neonates have a repertoire immaturity which potentially contributes to their increased infection susceptibility. A developmentally regulated, evenly distributed repertoire in preterm neonates may lead to the inclusion of public TCR CDR3β sequences that overlap between unrelated individuals in the preterm repertoire. Frontiers Media S.A. 2017-12-19 /pmc/articles/PMC5742125/ /pubmed/29312340 http://dx.doi.org/10.3389/fimmu.2017.01859 Text en Copyright © 2017 Carey, Hope, Mueller, Fike, Kumova, van Zessen, Steegers, van der Burg and Katsikis. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Immunology Carey, Alison J. Hope, Jennifer L. Mueller, Yvonne M. Fike, Adam J. Kumova, Ogan K. van Zessen, David B. H. Steegers, Eric A. P. van der Burg, Mirjam Katsikis, Peter D. Public Clonotypes and Convergent Recombination Characterize the Naïve CD8(+) T-Cell Receptor Repertoire of Extremely Preterm Neonates |
title | Public Clonotypes and Convergent Recombination Characterize the Naïve CD8(+) T-Cell Receptor Repertoire of Extremely Preterm Neonates |
title_full | Public Clonotypes and Convergent Recombination Characterize the Naïve CD8(+) T-Cell Receptor Repertoire of Extremely Preterm Neonates |
title_fullStr | Public Clonotypes and Convergent Recombination Characterize the Naïve CD8(+) T-Cell Receptor Repertoire of Extremely Preterm Neonates |
title_full_unstemmed | Public Clonotypes and Convergent Recombination Characterize the Naïve CD8(+) T-Cell Receptor Repertoire of Extremely Preterm Neonates |
title_short | Public Clonotypes and Convergent Recombination Characterize the Naïve CD8(+) T-Cell Receptor Repertoire of Extremely Preterm Neonates |
title_sort | public clonotypes and convergent recombination characterize the naïve cd8(+) t-cell receptor repertoire of extremely preterm neonates |
topic | Immunology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5742125/ https://www.ncbi.nlm.nih.gov/pubmed/29312340 http://dx.doi.org/10.3389/fimmu.2017.01859 |
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