TY - JOUR
T1 - Knockout of the PKN Family of Rho Effector Kinases Reveals a Non-redundant Role for PKN2 in Developmental Mesoderm Expansion
AU - Quétier, Ivan
AU - Marshall, Jacqueline J T
AU - Spencer-Dene, Bradley
AU - Lachmann, Sylvie
AU - Casamassima, Adele
AU - Franco, Claudio
AU - Escuin, Sarah
AU - Worrall, Joseph T
AU - Baskaran, Priththivika
AU - Rajeeve, Vinothini
AU - Howell, Michael
AU - Copp, Andrew J
AU - Stamp, Gordon
AU - Rosewell, Ian
AU - Cutillas, Pedro
AU - Gerhardt, Holger
AU - Parker, Peter J
AU - Cameron, Angus J M
N1 - Copyright © 2016 The Authors. Published by Elsevier Inc. All rights reserved.
PY - 2016/1/26
Y1 - 2016/1/26
N2 - In animals, the protein kinase C (PKC) family has expanded into diversely regulated subgroups, including the Rho family-responsive PKN kinases. Here, we describe knockouts of all three mouse PKN isoforms and reveal that PKN2 loss results in lethality at embryonic day 10 (E10), with associated cardiovascular and morphogenetic defects. The cardiovascular phenotype was not recapitulated by conditional deletion of PKN2 in endothelial cells or the developing heart. In contrast, inducible systemic deletion of PKN2 after E7 provoked collapse of the embryonic mesoderm. Furthermore, mouse embryonic fibroblasts, which arise from the embryonic mesoderm, depend on PKN2 for proliferation and motility. These cellular defects are reflected in vivo as dependence on PKN2 for mesoderm proliferation and neural crest migration. We conclude that failure of the mesoderm to expand in the absence of PKN2 compromises cardiovascular integrity and development, resulting in lethality.
AB - In animals, the protein kinase C (PKC) family has expanded into diversely regulated subgroups, including the Rho family-responsive PKN kinases. Here, we describe knockouts of all three mouse PKN isoforms and reveal that PKN2 loss results in lethality at embryonic day 10 (E10), with associated cardiovascular and morphogenetic defects. The cardiovascular phenotype was not recapitulated by conditional deletion of PKN2 in endothelial cells or the developing heart. In contrast, inducible systemic deletion of PKN2 after E7 provoked collapse of the embryonic mesoderm. Furthermore, mouse embryonic fibroblasts, which arise from the embryonic mesoderm, depend on PKN2 for proliferation and motility. These cellular defects are reflected in vivo as dependence on PKN2 for mesoderm proliferation and neural crest migration. We conclude that failure of the mesoderm to expand in the absence of PKN2 compromises cardiovascular integrity and development, resulting in lethality.
KW - Animals
KW - Antineoplastic Agents/pharmacology
KW - Apoptosis/drug effects
KW - Cell Line
KW - Cell Movement/drug effects
KW - Cell Proliferation/drug effects
KW - Embryo, Mammalian/cytology
KW - Embryonic Development/drug effects
KW - Genes, Reporter
KW - Heart/growth & development
KW - Mesoderm/cytology
KW - Mice
KW - Mice, Inbred C57BL
KW - Mice, Knockout
KW - Microscopy, Electron, Scanning
KW - Myocardium/metabolism
KW - Protein Kinase C/deficiency
KW - Tamoxifen/analogs & derivatives
U2 - 10.1016/j.celrep.2015.12.049
DO - 10.1016/j.celrep.2015.12.049
M3 - Article
C2 - 26774483
SN - 2211-1247
VL - 14
SP - 440
EP - 448
JO - Cell Reports
JF - Cell Reports
IS - 3
ER -