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D-penicillamine induced changes on rat mast cell cyclic GMP levels
International Journal of Tissue Reactions
|June 1, 1981
Summary
D-penicillamine reduces cyclic guanosine monophosphate (cGMP) levels in rat mast cells, both basal and stimulated. This drug affects cGMP metabolism but does not inhibit histamine release.
Area of Science:
- Pharmacology
- Cell Biology
- Biochemistry
Background:
- Mast cells play a crucial role in allergic responses.
- Cyclic guanosine monophosphate (cGMP) is a key intracellular second messenger.
- D-penicillamine is a thiol-containing drug with known therapeutic uses.
Purpose of the Study:
- To investigate the effect of D-penicillamine on cGMP levels in rat serosal mast cells.
- To determine if D-penicillamine modulates cGMP accumulation induced by compound 48/80.
- To assess the relationship between D-penicillamine's effect on cGMP and histamine release.
Main Methods:
- Primary cell culture of rat serosal mast cells.
- Treatment with varying doses of D-penicillamine.
- Activation of mast cells with compound 48/80.
- Measurement of intracellular cGMP levels using established biochemical assays.
Main Results:
- D-penicillamine decreased basal cGMP levels in a dose-dependent manner.
- Compound 48/80 significantly increased intracellular cGMP levels.
- D-penicillamine inhibited the 48/80-induced cGMP accumulation and reduced steady-state levels in activated cells.
- The observed effects on cGMP metabolism were independent of histamine release.
Conclusions:
- D-penicillamine modulates cGMP metabolism in rat mast cells.
- The drug's action on cGMP pathways does not correlate with its effect on histamine release.
- Further research is warranted to elucidate the precise mechanisms of D-penicillamine's action on mast cell signaling.