ArticleThe Biochemical journal1993
Potentiation by cholera toxin of bradykinin-induced inositol phosphate production in the osteoblast-like cell line MC3T3-E1.
Article in The Biochemical journal, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 21 citations in OpenAlex.
- Prolonged elevation of intracellular cyclic AMP levels in U937 cells increases the number of receptors for and the responses to formylmethionyl-leucylphenylalanine, independently of the differentiation process.The Biochemical journal · 1995Article
- Pharmacological characterization of bradykinin receptors in canine cultured tracheal smooth muscle cells.British journal of pharmacology · 1995Article
- The effect of cyclic AMP elevating agents on bradykinin- and carbachol-induced signal transduction in canine cultured tracheal smooth muscle cells.British journal of pharmacology · 1994Article
- Prostaglandin F2 alpha-stimulated phospholipase D activation in osteoblast-like MC3T3-E1 cells: involvement in sustained 1,2-diacylglycerol production.The Biochemical journal · 1994Article
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4 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Cells of the osteoblastic cell line MC3T3-E1 were shown to contain at least three phosphatidylinositol-specific phospholipase C (PI-PLC) isoenzymes (PLC-beta, PLC-gamma and PLC-delta) by Western blotting analysis with various anti-PLC antibodies. Stimulation of inositol phosphate production in MC3T3-E1 cells by bradykinin (BK) occurred via a GTP-binding protein. Inositol phosphate formation on stimulation by BK was not affected by pretreatment with pertussis toxin, whereas it was potentiated by cholera toxin pretreatment. Elevation of cellular cyclic AMP levels by brief pretreatment with dibutyryl cyclic AMP or forskolin failed to enhance the BK-mediated generation of inositol phosphates, but long-term preincubation with these agents partially mimicked the action of the cholera toxin. Cholera toxin also caused an increase in BK receptor number. Cycloheximide, a protein biosynthesis inhibitor, prevented the potentiating actions of the cholera toxin and the cyclic AMP-elevating agents on BK-induced inositol phosphate production, and also inhibited the increase in BK receptor number. The specific binding of [3H]BK to the whole MC3T3-E1 cells in the presence or absence of cholera toxin was completely inhibited by the B2 BK receptor antagonist D-Arg[Hyp3,Thi5,8,D-Phe7]BK, but not by the B1 BK receptor agonist des-Arg9-BK. These data suggest that the activation of PI-PLC induced by cholera toxin in BK-stimulated MC3T3-E1 cells was caused by an enhancement of the synthesis of BK receptor protein(s), at least part of which was mediated by a sustained increase in the intracellular level of cyclic AMP.
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