Related Experiment Video
Updated: Sep 28, 2026

An Experimental System to Study Mechanotransduction in Fetal Lung Cells
Published on: February 16, 2012
Cell-specific and developmental expression of phospholipase C-gamma and diacylglycerol in fetal lung
Sujatha M Ramadurai1, Wu-Yuan Chen, George B Yerozolimsky
1Division of Newborn Medicine, Tufts-New England Medical Center, Boston, Massachusetts 02111, USA. sramadurai@tufts-nemc.org
Abstract:
Epidermal growth factor (EGF) receptor (EGFR) regulates development of cell-cell communication in fetal lung, but the signal transduction mechanisms involved are unknown. We hypothesized that, in late-gestation fetal rat lung, phospholipase C-gamma (PLC-gamma) expression and activation by EGF is cell specific and developmentally regulated. PLC-gamma immunolocalized to cuboidal epithelium and mesenchymal clusters underlying developing saccules. PLC-gamma protein increased from day 17 to day 19 and then decreased. In cultured fetal lung fibroblasts, EGF stimulated PLC-gamma phosphorylation 2.6-fold (day 17), 10.8-fold (day 19), and 4.2-fold (day 21). EGF stimulated (3)H-labeled diacylglycerol production in fibroblasts (beginning on day 18 in female and on day 19 in male rats), but not in type II cells at any time during gestation. EGFR blockade abrogated the observed stimulation of PLC-gamma phosphorylation by EGF. In conclusion, PLC-gamma expression and activation by EGF in fetal lung are cell specific, corresponding to the development of EGFR expression. EGF induces diacylglycerol production in a cell- and gestation-specific manner. PLC-gamma activation by EGFR in fetal lung fibroblasts may be involved in EGF control of lung development.
Related Concept Videos
IP3/DAG Signaling Pathway
Phosphoinositides and PIPs
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Cell Specific Gene Expression
Overview of Fatty Acid Metabolism
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
Amplifying Signals via Second Messengers
Amplifying Signals via Enzymatic Cascade

