Korean J Physiol Pharmacol.  1999 Feb;3(1):11-18.

Role of protein kinases on NF- kappaB activation and cell death in bovine cerebral endothelial cells

• Ahn YS
• Kim CH
• Kim JH

Abstract

Nuclear factor kappaB (NF- kappaB) activation is modulated by various protein kinases. Activation of NF- kappaB is known to be important in the regulation of cell viability. The present study investigated the effect of inhibitors of protein tyrosine kinase (PTK), protein kinase C (PKC) and protein kinase A (PKA) on NF- kappaB activity and the viability of bovine cerebral endothelial cells (BCECs). In serum-deprivation-induced BCEC death, low doses of TNF alpha showed a protective effect. TNF alpha induced NF- kappaB activation within 4 h in serum-deprivation. PTK inhibitors (herbimycin A and genistein) and PKC inhibitor (calphostin C) prevented NF- kappaB activation stimulated by TNF alpha. Likewise, these inhibitors prevented the protective effect of TNF alpha. In contrast to TNF alpha-stimulated NF- kappaB activity, basal NF- kappaB activity of BCECs in media containing serum was suppressed only by calphostin C, but not by herbimycin A. As well BCEC death was also induced only by calphostin C in serum-condition. H 89, a PKA inhibitor, did not affect the basal and TNF alpha-stimulated NF- kappaB activities and the protective effect of TNF alpha on cell death. These data suggest that modulation of NF- kappaB activation could be a possible mechanism for regulating cell viability by protein kinases in BCECs.

Keyword

NF- kappaB; Cerebral endothelial cell death; Protein kinase

MeSH Terms

Cell Death*
Cell Survival
Cyclic AMP-Dependent Protein Kinases
Endothelial Cells*
Protein Kinase C
Protein Kinases*
Protein-Tyrosine Kinases
Cyclic AMP-Dependent Protein Kinases
Protein Kinase C
Protein Kinases
Protein-Tyrosine Kinases