TY - JOUR
T1 - Temporal differences in Erk1/2 activity distinguish among combinations of extracellular matrix components
AU - Pauken, Christine M.
AU - Caplan, Michael
N1 - Funding Information:
This work was funded by the Arizona Biomedical Research Commission and the American Heart Association.
PY - 2011/11
Y1 - 2011/11
N2 - Rational design of biomaterials requires understanding how cells interrogate their microenvironment. In this study, human umbilical vein endothelial cells are cultured on combinations of extracellular matrix (ECM) components (collagen I, collagen IV, vitronectin, fibronectin, laminin, heparan sulfate proteoglycan, chondroitin sulfate proteoglycan), and the phosphorylation of four intracellular signaling kinases (Erk1/2, JNK, Akt1, and NFκB) is quantified. These combinations of ECM components elicit different temporal patterns of Erk1/2 phosphorylation. Collagen I-containing substrates cause Erk1/2 phosphorylation to reach maximal levels at 30 min and remain near maximal levels until 90 min. Collagen IV/laminin substrates elicit maximal phosphorylation at 30-45 min, and then phosphorylation decreases substantially at 60-90 min. All other combinations studied (collagen IV and vitronectin-based combinations) cause an increase in phosphorylation at 30-45 min, but not to maximal levels; maximal phosphorylation is reached by 60-90 min. These temporal patterns of phosphorylation may explain how a limited number of intracellular signaling pathways can distinguish among thousands of possible combinations of microenvironmental cues by adding to the information contained in each cell signaling pathway.
AB - Rational design of biomaterials requires understanding how cells interrogate their microenvironment. In this study, human umbilical vein endothelial cells are cultured on combinations of extracellular matrix (ECM) components (collagen I, collagen IV, vitronectin, fibronectin, laminin, heparan sulfate proteoglycan, chondroitin sulfate proteoglycan), and the phosphorylation of four intracellular signaling kinases (Erk1/2, JNK, Akt1, and NFκB) is quantified. These combinations of ECM components elicit different temporal patterns of Erk1/2 phosphorylation. Collagen I-containing substrates cause Erk1/2 phosphorylation to reach maximal levels at 30 min and remain near maximal levels until 90 min. Collagen IV/laminin substrates elicit maximal phosphorylation at 30-45 min, and then phosphorylation decreases substantially at 60-90 min. All other combinations studied (collagen IV and vitronectin-based combinations) cause an increase in phosphorylation at 30-45 min, but not to maximal levels; maximal phosphorylation is reached by 60-90 min. These temporal patterns of phosphorylation may explain how a limited number of intracellular signaling pathways can distinguish among thousands of possible combinations of microenvironmental cues by adding to the information contained in each cell signaling pathway.
KW - Basement membrane
KW - Biomaterial
KW - Endothelial cells
KW - Intracellular signaling
KW - Systems biology
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UR - http://www.scopus.com/inward/citedby.url?scp=80053560752&partnerID=8YFLogxK
U2 - 10.1016/j.actbio.2011.07.015
DO - 10.1016/j.actbio.2011.07.015
M3 - Article
C2 - 21803177
AN - SCOPUS:80053560752
SN - 1742-7061
VL - 7
SP - 3973
EP - 3980
JO - Acta Biomaterialia
JF - Acta Biomaterialia
IS - 11
ER -