Amniotic MSC affect CD8 naive polarization toward SLEC/MPEC subsets by down-modulating IL-12Rβ1 and IL-2Rα signaling
Andrea Papait1,2, Elsa Vertua3, Patrizia Bonassi Signoroni3
1Department of Life Science and Public Health, Università Cattolica del Sacro Cuore, 00168 Rome, Italy.
Iscience
|December 11, 2023
Summary
Human amniotic membrane mesenchymal stromal cells (hAMSCs) regulate CD8 T cell differentiation by impacting their metabolism and gene expression. These findings offer new insights into treating immune-related diseases.
Area of Science:
- Immunology
- Cell Biology
- Regenerative Medicine
Background:
- Mesenchymal stromal cells (MSCs) possess immunomodulatory properties.
- Understanding MSCs' impact on T cell subsets is crucial for therapeutic applications.
Purpose of the Study:
- To investigate the effects of human amniotic membrane mesenchymal stromal cells (hAMSCs) on CD8 T cell fate.
- To elucidate the underlying mechanisms of hAMSC-mediated immunomodulation.
Main Methods:
- Isolation and characterization of hAMSCs.
- Analysis of CD8 T cell metabolism, receptor expression, and transcription factor activity upon co-culture with hAMSCs.
- Assessment of signaling pathways including mTOR, AKT, STAT4, and STAT5 phosphorylation.
Main Results:
- hAMSCs downregulated mTOR and AKT phosphorylation in naive CD8 T cells, inhibiting differentiation.
- hAMSCs reduced the expression of IL-12Rβ1 and IL-2RA, leading to decreased STAT4 and STAT5 phosphorylation.
- hAMSCs suppressed the expression of transcription factors Tbet and Eomes, critical for early effector cell commitment.
Conclusions:
- hAMSCs modulate CD8 T cell fate through a multifaceted mechanism affecting metabolism and gene expression.
- These findings provide novel mechanistic insights into MSC-based therapies for immune-mediated diseases like autoimmune disorders and graft-versus-host disease.
