Trends in TREC values according to age and gender in Chinese children and their clinical applications.
Eur J Pediatr
; 181(2): 529-538, 2022 Feb.
Article
em En
| MEDLINE
| ID: mdl-34405301
ABSTRACT
T cell receptor excision circles (TRECs) are small circularized DNA elements produced during rearrangement of T cell receptor (TCR) genes. Because TRECs are fairly stable, do not replicate during mitosis, and are not diluted during division of naïve T cells (Dion et al. [1]), they are suitable for assessing the number of newly formed T cells (Ping and Denise [2]). In this study, we detected TRECs in 521 healthy Chinese children aged 0-18 years in different clinical settings. The TRECs decrease with aging and show lower levels in preterm and low birth weight (BW) babies compared to those in full-term infants, while the preterm babies can also show comparable levels of TRECs when they have a gestation age (GA)-matched BW. We found a strong correlation between TRECs and peripheral CD4 naïve T cell numbers, which was age-related. We also analyzed the TRECs in different PIDs. Since T cell defects vary in PIDs, TREC levels change inconsistently. For example, in Wiskott-Aldrich syndrome (WAS), combining the level of TREC with lymphocyte subsets can help to distinguish subtypes of disease.Conclusion:
We established the reference value range for TRECs by evaluating children below 18 years old in China, which could be used to screen for PIDs during early life. What is Known ⢠The TREC levels are decreased with age, and there is a positive correlation between TRECs and the numbers of naïve T cells. What is New ⢠This is the largest study to determine TREC reference levels in healthy Chinese pediatric, we provide solid data showing a correlation between CD4 naïve T cell counts and TREC levels according to age. We point out the GA matched BW is need to be considered during the SCID newborn screening. We are the first group showed that TREC levels can help clinician distinguish different WAS phenotype.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
DNA Circular
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Receptores de Antígenos de Linfócitos T
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Linfócitos T
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Rearranjo Gênico do Linfócito T
Tipo de estudo:
Diagnostic_studies
Limite:
Adolescent
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Child
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Child, preschool
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Humans
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Infant
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Newborn
País/Região como assunto:
Asia
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article