Abstract:
:Our laboratory demonstrated that endoplasmic reticulum iPLA2 (ER-iPLA2) activity protects renal cells from oxidant-induced cell death and lipid peroxidation. The goals of this study were to determine the PLA2 isoform(s) responsible for ER-iPLA2 activity in different species and tissues. ER-iPLA2 activity was observed in microsomes from rabbit and rat kidney, heart, and brain as well as in human kidney (Caki-1 and HEK293) and glioblastoma (A172) cell lines. Reverse transcriptase-polymerase chain reaction results demonstrated the presence of iPLA2gamma (group VIB PLA2) message in all tissues tested. Immunoblot analysis and PLA2 inhibitor studies with methyl arachidonyl fluorophosphonate and enantiomers of bromoenol lactone demonstrated that the ER-iPLA2 in rabbit kidney and heart and rat kidney is iPLA2gamma. These results demonstrate the expression of ER-iPLA2gamma (group VIB) across species and tissues, and suggest that iPLA2gamma may play critical roles in oxidant-induced cell injury.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Kinsey GR,Cummings BS,Beckett CS,Saavedra G,Zhang W,McHowat J,Schnellmann RGdoi
10.1016/j.bbrc.2004.12.016subject
Has Abstractpub_date
2005-02-04 00:00:00pages
287-93issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(04)02794-9journal_volume
327pub_type
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