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The specific suppression of contact sensitivity
Abstract:
The ability of 2,4,6 trinitrobenzenesulfonic acid (TNBS)-induced regulatory cells to modulate the generation of contact sensitivity (CS) to picryl chloride has been studied. We have confirmed that such suppressor cells can modulate CS and have extended these observations to demonstrate that suppressor factors, liberated by suppressor cells in supernatants, can limit the generation of CS. We have also confirmed that hapten-coupled membrane products can induce tolerance to PCl. The investigation of the properties of the suppressor factors has revealed that they are hapten-specific and bear H2 coded specificities.
Insights
Regulatory cells induced by 2,4,6 trinitrobenzenesulfonic acid (TNBS) can suppress contact sensitivity (CS) to picryl chloride. Suppressor factors from these cells limit CS generation and induce tolerance, showing hapten specificity and H2-coded traits.
Area of Science:
- Immunology
- Cellular immunology
- Immunoregulation
Background:
- Contact sensitivity (CS) is an immune response mediated by T cells.
- Regulatory cells play a crucial role in modulating immune responses.
- Understanding suppressor mechanisms is key to controlling immune hypersensitivity.
Purpose of the Study:
- To investigate the role of 2,4,6 trinitrobenzenesulfonic acid (TNBS)-induced regulatory cells in contact sensitivity (CS) to picryl chloride.
- To characterize the suppressor factors released by these regulatory cells.
- To determine the specificity and genetic coding of these suppressor factors.
Main Methods:
- Induction of regulatory cells using 2,4,6 trinitrobenzenesulfonic acid (TNBS).
- Assessment of contact sensitivity (CS) modulation.
- Analysis of suppressor factors in cell supernatants.
- Investigation of hapten-coupled membrane products for tolerance induction.
- Characterization of suppressor factor specificity (hapten and H2-coded).
Main Results:
- TNBS-induced regulatory cells were confirmed to modulate CS generation.
- Suppressor factors released by these cells were shown to limit CS.
- Hapten-coupled membrane products induced tolerance to picryl chloride (PCl).
- Suppressor factors demonstrated hapten specificity.
- Suppressor factors were found to bear H2-coded specificities.
Conclusions:
- Regulatory cells and their secreted factors effectively suppress contact sensitivity (CS).
- Tolerance to picryl chloride (PCl) can be induced via hapten-coupled products.
- The identified suppressor factors are specific for haptens and possess H2-coded traits, suggesting a role for MHC in their function.