Stimulation of the Platelet-derived Growth Factor Beta Receptor Signaling Pathway Activates Protein Kinase C-delta
Overview
Affiliations
The murine myeloid progenitor cell line 32D was recently shown to undergo monocytic differentiation when protein kinase C-delta (PKC-delta) was overexpressed and activated by 12-O-tetradecanoylphorbol-13-acetate (TPA) (H. Mischak, J.H. Pierce, J. Goodnight, M.G. Kazanietz, P.M. Blumberg, and J.F. Mushinski, J. Biol. Chem. 268:20110-20115, 1993). Tyrosine phosphorylation of PKC-delta occurred when PKC-delta-transfected 32D cells were stimulated by TPA (W. Li, H. Mischak, J.-C. Yu, L.-M. Wang, J.F. Mushinski, M.A. Heidaran, and J.H. Pierce, J. Biol. Chem. 269:2349-2352, 1994). In order to elucidate the role played by PKC-delta in response to activation of a receptor tyrosine kinase, we transfected platelet-derived growth factor beta receptor (PDGF-beta R) alone (32D/PDGF-beta R) or together with PKC-delta (32D/PDGF-beta R/PKC-delta) into 32D cells. NIH 3T3 cells which endogenously express both PDGF-alpha R and PDGF-beta R were also transfected with PKC-delta (NIH 3T3/PKC-delta). Like TPA treatment, PDGF-BB stimulation caused striking phosphorylation of PKC-delta in vivo and translocation of some PKC-delta from the cytosol fraction to the membrane fraction in both cell systems. Some of the phosphorylation induced by PDGF-BB treatment was found to be on a tyrosine residue(s). Tyrosine-phosphorylated PKC-delta was observed only for the membrane fraction after stimulation with PDGF-BB or TPA. The enzymatic activity of PKC-delta in the membrane fraction also increased after stimulation with TPA or PDGF, providing a positive correlation between PKC-delta tyrosine phosphorylation and its activation. Overnight treatment of 32D/PDGF-beta R/PKC-delta cells with PDGF-BB induced monocytic differentiation as judged by an increase in expression of cell surface macrophage differentiation markers. PDGF-BB had much weaker effects on 32D/PDGF-beta R cell differentiation, suggesting that increased PKC-delta expression enhanced monocytic differentiation. These results indicate that PKC-delta is a downstream molecule in the PDGFR signaling pathway and may play a pivotal role in PDGF-beta R-mediated cell differentiation.
A Promising Candidate in Tendon Healing Events-PDGF-BB.
Chen Y, Jiang L, Lyu K, Lu J, Long L, Wang X Biomolecules. 2022; 12(10).
PMID: 36291727 PMC: 9599567. DOI: 10.3390/biom12101518.
Role and Mechanism of PKC-δ for Cardiovascular Disease: Current Status and Perspective.
Miao L, Pan D, Shi J, Du J, Chen P, Gao J Front Cardiovasc Med. 2022; 9:816369.
PMID: 35242825 PMC: 8885814. DOI: 10.3389/fcvm.2022.816369.
Sarhan A, Szyroka J, Begum S, Tomlinson M, Hotchin N, Heath J Sci Rep. 2017; 7(1):3970.
PMID: 28638064 PMC: 5479788. DOI: 10.1038/s41598-017-04015-x.
Endothelin-1 stimulates catalase activity through the PKCδ-mediated phosphorylation of serine 167.
Rafikov R, Kumar S, Aggarwal S, Hou Y, Kangath A, Pardo D Free Radic Biol Med. 2013; 67:255-64.
PMID: 24211614 PMC: 3945115. DOI: 10.1016/j.freeradbiomed.2013.10.814.
Marengo B, Ciucis C, Ricciarelli R, Passalacqua M, Nitti M, Zingg J PLoS One. 2011; 6(2):e14661.
PMID: 21326872 PMC: 3034714. DOI: 10.1371/journal.pone.0014661.