The thymic suppressor cell. I. Separation of subpopulations with suppressor activity.

This study confirms the finding that washed thymocytes from rats given 100 mg of BGG 48 h earlier, when transferred to syngeneic recipients, exert a specific suppressor effect on immunological responses to BGG in the latter. The active cells are found in a subpopulation of low density, making up less than 10% of the total thymocytes, and are partially resistant to hydrocortisone.