Specific suppression of the in vitro parent anti-hybrid reaction. II. Parameters influencing suppressor cell induction in the F1 hybrid
In the accompanying paper we have reported that the spleens of B6D2F1 hybrids pretreated with B6 spleen cells 7 days earlier contain a cell which specifically suppresses the in vitro proliferative and cytotoxic B6 anti-B6D2F1 responses. The results we present here concern the in vivo conditions under which this suppressor cell can be induced. Suppressor cell activity appears early after the injection of B6 spleen cells (day +1), increases on Day 7, and disappears by Day 30; it is always detectable after the injection of 5 X 10(7) B6 spleen cells and never after the injection of 1.25 X 10(7) cells, the intermediate dose of 2.5 X 10(7) cells being followed by variable results. This variability is attributable to the age of B6 donor and B6D2F1 recipient mice, and suppression is never observed when 2.5 X 10(7) spleen cells from 6-week-old B6 mice are injected into 6-week-old B6D2F1 hybrids. The suppressor cell is induced by the injection of B6 spleen cells of the Thy-1+ Ly-1-2+ phenotype, even if they are irradiated at 1000 R just before their injection. Lymph node cells from B6 mice induce the suppressor cell, whereas thymocytes do not. Irradiation of B6D2F1 hybrids at 600 or 950 R does not prevent the induction of suppressor cell, nor does thymectomy. Moreover, in the thymectomized or 600 R-irradiated B6D2F1 animals suppression can be induced even by the injection of only 1.25 X 10(7) B6 spleen cells. This phenomenon of specific suppression is not limited to the B6-B6D2F1 genetic combination since it has been observed in all parent-hybrid combinations tested to date.
- Research Organization:
- Universite de Paris-Sud, Villejuif, France
- OSTI ID:
- 6572474
- Journal Information:
- Cell. Immunol.; (United States), Vol. 2
- Country of Publication:
- United States
- Language:
- English
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LYMPHOCYTES
BIOLOGICAL RADIATION EFFECTS
SPLEEN CELLS
CELL PROLIFERATION
DOSE-RESPONSE RELATIONSHIPS
IMMUNE REACTIONS
IRRADIATION
LYMPH NODES
MICE
RADIATION DOSES
THYMECTOMY
ANIMAL CELLS
ANIMALS
BIOLOGICAL EFFECTS
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY FLUIDS
CONNECTIVE TISSUE CELLS
DOSES
LEUKOCYTES
LYMPHATIC SYSTEM
MAMMALS
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MEDICINE
RADIATION EFFECTS
RODENTS
SOMATIC CELLS
SURGERY
VERTEBRATES
560120* - Radiation Effects on Biochemicals
Cells
& Tissue Culture