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Immunosuppression by fetal liver as a model for tolerance to self
Advances in Experimental Medicine and Biology
|January 1, 1976
Summary
This study reveals that suppressor cells in embryonic liver cells induce tolerance to self antigens. Thymus presence is crucial for these cells to specifically target and suppress self-reactive immune responses.
Area of Science:
- Immunology
- Developmental Biology
- Transplantation Immunology
Background:
- Understanding the mechanisms of self-tolerance is crucial for preventing autoimmune diseases.
- Embryonic liver cells have been investigated for their role in immune system development.
Purpose of the Study:
- To investigate the development of tolerance to self antigens using an embryonic liver chimera model.
- To identify the cellular mechanisms underlying the induction of permanent tolerance.
Main Methods:
- Utilized an embryonic liver chimera system with (C3H/eb x C57BL/6)F1 irradiated hosts.
- Reconstituted hosts with parental C57BL liver cells to study tolerance induction.
Main Results:
- Induced a permanent tolerant state in chimeric hosts.
- Identified suppressor cells within the liver cell inoculum as mediators of tolerance.
- Observed general suppressor activity in early gestation embryonic liver cells.
Conclusions:
- Suppressor cells in embryonic liver cells are responsible for inducing tolerance to self antigens.
- Thymus-dependent differentiation is required for these suppressor cells to target self antigens specifically.