Abstract:
:The gamma-isomer of hexachlorocyclohexane (gamma-HCCH), which displays structural homology with inositol, was found to induce an initial influx of Ca2+ in mouse peritoneal macrophages. This was responsible for Ca(2+)-induced Ca2+ release via inositol 1,4,5-trisphosphate produced by phospholipase C and resulted in a sustained increase of cytoplasmic free Ca2+ concentration ([Ca2+]i). Entry of Ca2+ evoked by gamma-HCCH also stimulated phospholipase D, as well as the generation of reactive oxygen species formed by NADPH oxidase. These data suggest that some isoform(s) of phospholipase C, and possibly phospholipase D, can be activated by strictly Ca(2+)-dependent mechanisms. They also describe a new experimental tool allowing to trigger a selective influx of Ca2+. gamma-HCCH could thus be used in further studies aimed to delineate the role of Ca2+ entry in the subsequent activation of other signalling pathways.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Pinelli E,Cambon C,Tronchère H,Chap H,Teissié J,Pipy Bdoi
10.1006/bbrc.1994.1285subject
Has Abstractpub_date
1994-03-15 00:00:00pages
699-705issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(84)71285-Xjournal_volume
199pub_type
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