Age-Related Dynamics and Spectral Characteristics of the TCRβ Repertoire in Healthy Children: Implications for Immune Aging.

IF 8 1区医学 Q1 CELL BIOLOGY

Aging Cell Pub Date : 2025-01-02 DOI:10.1111/acel.14460

Mingyan Fang, Yu Miao, Lin Zhu, Yunpeng Mei, Hui Zeng, Lihua Luo, Yuan Ding, Lina Zhou, Xueping Quan, Qin Zhao, Xiaodong Zhao, Yunfei An

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引用次数: 0

Abstract

T-cell receptor (TCR) diversity is crucial for adaptive immunity, yet baseline characterizations in pediatric populations remain sparse. We sequenced the TCRβ chain of 325 healthy Chinese children aged 0-18, categorized into six age groups. We also analyzed cellular composition and TCRβ associations using flow cytometry in 81 of these samples. Our results indicate a decrease in TCRβ diversity with age, characterized by an increase in high-frequency clonotypes and notable changes in CDR3 length and V(D)J gene usage. These changes are influenced by early life vaccinations and antigen exposures. Additionally, we found a significant association between reduced TCRβ diversity and a decrease in CD4⁺ T naïve cells. We also developed a predictive model that identifies specific TCRβ features as potential biomarkers for biological age, validated by their significant correlation with changes in the immune repertoire. These findings enhance our understanding of age-related variations in the TCRβ repertoire among children, providing resourceful information for research on pediatric TCR in health and disease.

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健康儿童TCRβ库的年龄相关动态和谱特征：对免疫衰老的影响

t细胞受体（TCR）多样性对适应性免疫至关重要，但儿科人群的基线特征仍然很少。我们对325名0-18岁的健康中国儿童进行了TCRβ链测序，将他们分为6个年龄组。我们还使用流式细胞术分析了81个样本的细胞组成和TCRβ的相关性。我们的研究结果表明，TCRβ多样性随着年龄的增长而下降，其特征是高频克隆型的增加，CDR3长度和V(D)J基因使用的显著变化。这些变化受到生命早期接种疫苗和抗原暴露的影响。此外，我们发现TCRβ多样性降低与CD4+ T naïve细胞减少之间存在显著关联。我们还开发了一种预测模型，该模型确定了特定的TCRβ特征作为生物年龄的潜在生物标志物，并通过它们与免疫库变化的显著相关性进行了验证。这些发现增强了我们对儿童TCRβ库的年龄相关变化的理解，为儿童TCR在健康和疾病中的研究提供了丰富的信息。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aging Cell Biochemistry, Genetics and Molecular Biology-Cell Biology

自引率

2.60%

发文量

212

期刊介绍： Aging Cell is an Open Access journal that focuses on the core aspects of the biology of aging, encompassing the entire spectrum of geroscience. The journal's content is dedicated to publishing research that uncovers the mechanisms behind the aging process and explores the connections between aging and various age-related diseases. This journal aims to provide a comprehensive understanding of the biological underpinnings of aging and its implications for human health. The journal is widely recognized and its content is abstracted and indexed by numerous databases and services, which facilitates its accessibility and impact in the scientific community. These include: Academic Search (EBSCO Publishing) Academic Search Alumni Edition (EBSCO Publishing) Academic Search Premier (EBSCO Publishing) Biological Science Database (ProQuest) CAS: Chemical Abstracts Service (ACS) Embase (Elsevier) InfoTrac (GALE Cengage) Ingenta Select ISI Alerting Services Journal Citation Reports/Science Edition (Clarivate Analytics) MEDLINE/PubMed (NLM) Natural Science Collection (ProQuest) PubMed Dietary Supplement Subset (NLM) Science Citation Index Expanded (Clarivate Analytics) SciTech Premium Collection (ProQuest) Web of Science (Clarivate Analytics) Being indexed in these databases ensures that the research published in Aging Cell is discoverable by researchers, clinicians, and other professionals interested in the field of aging and its associated health issues. This broad coverage helps to disseminate the journal's findings and contributes to the advancement of knowledge in geroscience.