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Enhancement of disaturated phosphatidylcholine synthesis by epidermal growth factor in cultured fetal lung cells involves a fibroblast-epithelial cell interaction
Journal article   Peer reviewed

Enhancement of disaturated phosphatidylcholine synthesis by epidermal growth factor in cultured fetal lung cells involves a fibroblast-epithelial cell interaction

N. Sen and M.H. Cake
American Journal of Respiratory Cell and Molecular Biology, Vol.5(4), pp.337-343
1991
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Abstract

Epidermal growth factor (EGF) increases the rate of choline incorporation into disaturated phosphatidylcholine in cultured fetal rat type II cells via an indirect mechanism. Whereas-EGF has no effect on the rate of disaturated phosphatidylcholine synthesis when added directly to type II pneumocytes, the growth factor is effective if it is present during preliminary conditioning of the media by lung fibroblasts. This effect is concentration dependent with a maximal effect at 20 ng/ml. When lung fibroblasts are incubated with both glucocorticoids and EGF, there is no significant effect of the growth factor over and above that seen with the steroid alone. This suggests that the two agents might act via a similar mechanism. This is supported by the observation that each inducer leads to the production by lung fibroblasts of a stimulatory factor that has a similar, if not identical, chromatographic elution profile. We conclude that EGF may contribute significantly to the normal onset of lung maturation by elaborating a fibroblast-derived factor that stimulates phosphatidylcholine synthesis in type II pneumocytes.

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Citation topics
1 Clinical & Life Sciences
1.154 Assisted Ventilation
1.154.1057 Pulmonary Surfactant
Web Of Science research areas
Biochemistry & Molecular Biology
Cell Biology
Respiratory System
ESI research areas
Biology & Biochemistry
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