Back to Search Start Over

Downregulation of Phospholipase C δ3 by cAMP and Calcium

Authors :
Fu-Gong Lin
Hwei-Fang Cheng
Wei-Hwa Lee
Shih-Hurng Loh
I-Fang Lee
Hsiao-Jung Kao
Source :
Biochemical and Biophysical Research Communications. 286:274-280
Publication Year :
2001
Publisher :
Elsevier BV, 2001.

Abstract

Four different isoforms of mammalian phospholipase C delta (PLCdelta) have been described. PLCdelta1, the best-understood isoform, is activated by an atypical GTP-binding protein. It has been suggested that it is a calcium signal amplifier. However, very less is known about other subtypes, including PLCdelta3. Therefore, in the present study, we examined the expression of PLCdelta3 in different human tissues. Moreover, the cellular underlying regulation for PLCdelta3 was studied in different cell lines. Our study showed that the mRNA and protein levels differed significantly among human tissues. The human PLCdelta3 gene was composed of 15 exons and 1 putative cAMP response element in the 5'-end promoter region. PLCdelta3 mRNA expression was downregulated by cAMP and calcium in both the human normal embryonic lung tissue diploid WI38 cell line and the glioblastoma/astrocytoma U373 cell line. However, mRNA expression showed no impact by PKC activators or inhibitors. This study shows the human PLCdelta3 expression pattern and is the first report that PLCdelta3 gene expression is downregulation by cAMP and calcium.

Details

ISSN :
0006291X
Volume :
286
Database :
OpenAIRE
Journal :
Biochemical and Biophysical Research Communications
Accession number :
edsair.doi.dedup.....598f572e743abb9a77a1d5d0ad0dfe0a
Full Text :
https://doi.org/10.1006/bbrc.2001.5371