Related Experiment Video
Updated: Jun 3, 2025
Author Spotlight: Advancing Thymic Epithelial Cells and T-Cell Research with Human Thymic Organoids
Published on: October 4, 2024
The effect of conditioned medium from human amniotic membrane-derived mesenchymal stem cells on thymus involution
Catarina S Silva1, Marta R Casanova1, Pedro Ferreirinha2
13B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho; Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory; Braga/Guimarães, Portugal.
Human amniotic membrane-derived mesenchymal stem cell conditioned media (hAMMSC CM) rejuvenates the aged thymus. This cell-free therapy enhances thymic cellularity, epithelial cells, and T cell populations, offering a potential treatment for immune system decline.
Area of Science:
- Immunology
- Cell Biology
- Regenerative Medicine
Background:
- The thymus is crucial for T cell development and selection, but it involutes with age, impairing immune function.
- Mesenchymal stem cells (MSCs) show immunomodulatory effects, but their secretome's impact on thymic involution is understudied.
Purpose of the Study:
- To investigate the effect of human amniotic membrane-derived MSC conditioned media (hAMMSC CM) on age-related thymus involution.
- To explore hAMMSC CM as a potential cell-free therapeutic strategy for thymic dysfunction.
Main Methods:
- Proteomic analysis of hAMMSC CM using liquid chromatography-tandem mass spectrometry.
- Intravenous injection of hAMMSC CM into aged mice.
- Flow cytometry analysis of thymic stromal and T cell compartments.
Main Results:
- hAMMSC CM is rich in proteins related to extracellular matrix, cell differentiation, and angiogenesis.
- Administration of hAMMSC CM increased total thymic cellularity and all thymic epithelial cell subsets.
- hAMMSC CM promoted thymocyte proliferation and positive selection, with mature T cells showing enhanced egress potential.
Conclusions:
- hAMMSC CM demonstrates a positive impact on the aged thymus, improving its cellularity and function.
- These findings suggest hAMMSC CM holds promise as a cell-free therapeutic approach for thymus involution and immune system enhancement.
