What question did this study set out to answer?

The study aims to understand the mechanisms driving the development of CD8+ T cells in neonates compared to adults.

July 30, 2026The Journal of Immunology

Hematopoietic origins of an early wave of CD8+ T cells 2256072

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Authors

IFIsabel ForlastroCornell University BRBrian RuddCornell University NSNorah SmithCornell University

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Implication

Randomized trial investigates early mechanisms driving CD8+ T cell development in neonates, suggesting intrinsic programming influences immune responses.

Key Points

The study aims to understand the mechanisms driving the development of CD8+ T cells in neonates compared to adults.
Utilized flow cytometry, intrathymic injections, and artificial thymic organoids to analyze T cell development.
Conducted paired single cell TCR/RNA sequencing and methyl-seq on thymocytes from differently aged mice.
Explored contributions of thymic selection, TCR usage, and hematopoietic progenitor sources.
Identified a distinct wave of CD8+ thymocytes with high Eomes expression in neonates absent in adults.
Single-cell RNA/TCR sequencing revealed Eomes+ cells with effector-like gene signatures and enriched germline-encoded TCRs.
Demonstrated that multiple fetal progenitor populations, unlike adult HSCs, generated VM cells, driven by Eomes and Lin28b expression.

Cite This Study

Forlastro et al. (2026) studied this question.

synapsesocial.com/papers/6a6af4e960e2b924d3ea073f https://doi.org/10.1093/jimmun/vkag141.305

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Implication

Randomized trial investigates early mechanisms driving CD8+ T cell development in neonates, suggesting intrinsic programming influences immune responses.

Hematopoietic origins of an early wave of CD8+ T cells 2256072

Discussion

Member takes

Implication

Key Points

Cite This Study

Hematopoietic origins of an early wave of CD8+ T cells 2256072

Discussion

Member takes

Implication

Key Points

Cite This Study

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