Abstract:
:The effect of inositol 1,4,5-trisphosphate (IP3) on Ca2+ release in the transformed murine mast cells, mastocytoma P-815 cells permeabilized with digitonin was studied. Ca2+ was sequestered by intracellular organelles in the presence of ATP until the medium free Ca2+ concentration was lowered to a new steady-state level. The subsequent addition of IP3 caused a rapid Ca2+ release, which was followed by a slow re-uptake of Ca2+. Fifty percent of the sequestered Ca2+ was released by 10 microM IP3. Maximal Ca2+ release occurred at 10 microM and half maximal activity was at 1.3 microM. These results indicate that IP3 may function as a messenger of intracellular Ca2+ mobilization in mastocytoma cells.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Muto Y,Tohmatsu T,Yoshioka S,Nozawa Ydoi
10.1016/0006-291x(86)90940-xsubject
Has Abstractpub_date
1986-02-26 00:00:00pages
46-51issue
1eissn
0006-291Xissn
1090-2104pii
0006-291X(86)90940-Xjournal_volume
135pub_type
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