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Updated: Aug 9, 2026
08:27
Derivation of T Cells In Vitro from Mouse Embryonic Stem Cells
Published on: October 14, 2014
Ontogeny of T lymphocyte function in the neonate
C B Wilson1, L Penix, W M Weaver
1Department of Pediatrics, University of Washington School of Medicine, Seattle.
Summary
Fetal and neonatal T cells show limited immune receptor diversity and function. Their reduced lymphokine production, like interferon-gamma and interleukin-4, stems from antigenic naivete and diminished gene transcription.
Area of Science:
- Immunology
- Developmental Biology
- Cellular and Molecular Medicine
Background:
- T cell precursors emerge in the thymus by eight weeks of gestation.
- By 15-20 weeks, alpha beta and gamma delta T-cell receptors are present, but diversity is limited compared to adults.
- Fetal and neonatal T cells exhibit immature functional capacity and a restricted lymphokine repertoire upon activation.
Purpose of the Study:
- To investigate the limited T-cell receptor diversity and functional immaturity in fetal and neonatal T cells.
- To understand the reduced production of key lymphokines, such as interferon-gamma and interleukin-4, in neonates.
- To explore the underlying mechanisms, including antigenic naivete and gene transcription regulation, of these differences.
Main Methods:
- Analysis of T cell precursor presence and T-cell receptor expression during gestation.
- Assessment of lymphokine production (interferon-gamma, interleukin-4) in neonatal T cells post-activation.
- Comparison of lymphokine gene transcription levels between neonatal and adult T cells.
- Investigation of promoter elements in lymphokine gene regulation.
Main Results:
- Neonatal T cells produce significantly less interferon-gamma and interleukin-4 (over tenfold reduction) compared to adult T cells.
- This reduced lymphokine production is linked to the absence of memory T cells and antigenic naivete in neonates.
- Diminished transcription of lymphokine genes in neonatal T cells is a primary cause of reduced protein expression.
- Preliminary findings suggest differences in promoter elements contribute to differential gene expression.
Conclusions:
- Fetal and neonatal T cells possess limited immune receptor diversity and functional capacity.
- Reduced lymphokine production in neonates is primarily due to diminished gene transcription, influenced by antigenic naivete.
- Further research into regulatory elements of lymphokine genes is warranted to understand T cell maturation and immune responses.
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