Receptor-coupled effector systems and their interactions
We investigated the modulation of intracellular signal generation by receptor-coupled effector systems in B lymphocytes, and whether these alterations are consistent with the effects of prostaglandins. TPA (12-O-tetradecanoyl phorbol-13-acetate) and sn-1,2,-dioctanoylglycerol (diC{sub 8}) substitute for lipid derived signals which activate protein kinase C. Pretreating splenocytes from athymic nude mice with 100nM TPA or 5 {mu}M diC{sub 8} potentiated the forskolin-induced increased in cAMP (measured by radioimmunoassay) 2.5 and 3.0 times (respectively), but they decreased the PGE{sub 1}-induced cAMP rise 48% and 35% (respectively). Goat anti-mouse IgM, which activates diacylglycerol production, potentiated the forskolin-induced cAMP increase by 76%, but reduced that of PGE{sub 1} by 30%. Rabbit anti-mouse IgG, its F(ab{prime}){sub 2} fragment, or goat anti-mouse IGM induced increases in the cytosolic free (Ca{sup 2+}), (Ca{sup 2+}){sub i}, which TPA inhibited. In contrast, TPA potential antibody-induced {sup 3}H-thymidine (85x) and {sup 3}H-uridine (30x) uptake in B lymphocytes.
- Research Organization:
- Pennsylvania Univ., Philadelphia, PA (USA)
- OSTI ID:
- 7018164
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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