[en] This study shows that, at low doses of collagen, glycoprotein VI activation leads to early protein kinase C- and MLC kinase-dependent platelet degranulation. Rapidly released ATP triggers P2X1 -mediated Ca2+ influx, activating ERK2, in turn amplifying platelet secretion by reinforcing the early MLC kinase phosphorylation. Hence, the P2X1-ERK2-MLC axis contributes to collagen-induced platelet activation by enhancing platelet degranulation.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Oury, Cécile ; Université de Liège - ULiège > Département des sciences biomédicales et précliniques > GIGA-R : Génétique humaine
Toth-Zsamboki, Emese; Katholieke Universiteit Leuven - KUL > Molecular and Cellular Medicine > CMVB
Cornelissen, Heidi; Katholieke Universiteit Leuven - KUL > Molecular and Cellular Medicine > CMVB
De Vos, Rita; Katholieke Universiteit Leuven - KUL > Molecular and Cellular Medicine > Morphology and Molecular Pathology
Vermylen, Jos; Katholieke Universiteit Leuven - KUL > Molecular and Cellular Medicine > CMVB
Hoylaerts, Marc F; Katholieke Universiteit Leuven - KUL > Molecular and Cellular Medicine > CMVB
Language :
English
Title :
P2X1-mediated ERK2 activation amplifies the collagen-induced platelet secretion by enhancing myosin light chain kinase activation.
Publication date :
2003
Journal title :
Journal of Biological Chemistry
ISSN :
0021-9258
eISSN :
1083-351X
Publisher :
American Society for Biochemistry and Molecular Biology, Baltimore, United States - Maryland
Booz, G.W., Dostal, D.E., Singer, H.A., Baker, K.M., (1994) Am. J. Physiol., 267, pp. C1308-C1318
Brinson, A.E., Harding, T., Diliberto, P.A., He, Y., Li, X., Hunter, D., Herman, B., Graves, L.M., (1998) J. Biol. Chem., 273, pp. 1711-1718
Siljander, P.R.-M., Farndale, R.W., (2002) Platelets in Thrombotic and Non-thrombotic Disorders, pp. 158-179. , (Gresele, P., Page, C., Fuster, V., and Vermylen, J.), Cambridge University Press, Cambridge, UK
Watson, S.P., Asazuma, N., Atkinson, B., Berlanga, O., Best, D., Bobe, R., Jarvis, G., Frampton, J., (2001) Thromb. Haemostasis, 86, pp. 276-288
Klemke, R.L., Cai, S., Giannini, A.L., Gallagher, P.J., De Lanerolle, P., Cheresh, D.A., (1997) J. Cell Biol., 137, pp. 481-492