The multifunctional Ca2+/Calmodulin-dependent Kinase II δ (CaMKIIδ) controls neointima formation after carotid ligation and vascular smooth muscle cell proliferation through cell cycle regulation by p21

Weiwei Li, Hui Li, Philip N. Sanders, Peter J. Mohler, Johannes Backs, Eric N. Olson, Mark E. Anderson, Isabella M. Grumbach

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The multifunctional Ca2+/calmodulin-dependent protein kinase II (CaMKII) promotes vascular smooth muscle (VSMC) proliferation. However, the signaling pathways mediating CAMKII-dependent proliferative effects in vivo are poorly understood. This study tested the hypothesis that CaMKIIδ mediates neointimal proliferation after carotid artery ligation by regulating expression and activity of cell cycle regulators, particularly at the G1/S checkpoint. Data herein indicate that 14 days after carotid ligation, C57Bl/6 mice developed a marked neointima with robust CaMKII protein expression. In particular, only the CaMKII isoform δ was increased as demonstrated by quantitative RT-PCR. Genetic deletion of CaMKII δ prevented injury-induced neointimal hyperplasia and cell proliferation in the intima and media. In ligated carotids of control mice, the proliferative cell cycle markers cdk2, cyclin E, and cyclin D1 were activated. In contrast, in CaMKIIδ-/- mice, we detected a reduction in proliferative cell cycle regulators as well as an increase in the cell cycle inhibitor p21. This expression profile was confirmed in cultured CaMKIIδ-/- VSMC, in which cdk2 and cdk4 activity was decreased. Toward understanding how CAMKIIδ affects p53, a transcriptional regulator of p21, we examined p53 pathway components. Our data indicate that p53 is elevated in CAMKIIδ-/- VSMC, whereas phosphorylation of the p53-specific E3 ligase, Mdm2, was decreased. In conclusion, CaMKII stimulates neointima proliferation after vascular injury by regulating cell proliferation through inhibition of p21 and induction of Mdm-2-mediated degradation of p53.

Original languageEnglish (US)
Pages (from-to)7990-7999
Number of pages10
JournalJournal of Biological Chemistry
Volume286
Issue number10
DOIs
StatePublished - Mar 11 2011

Fingerprint

Neointima
Calcium-Calmodulin-Dependent Protein Kinases
Cell proliferation
Calmodulin
Vascular Smooth Muscle
Smooth Muscle Myocytes
Ligation
Muscle
Cell Cycle
Phosphotransferases
Cells
Cell Proliferation
Calcium-Calmodulin-Dependent Protein Kinase Type 2
Activity Cycles
Cyclin E
Phosphorylation
Ubiquitin-Protein Ligases
Vascular System Injuries
Cyclin D1
Carotid Arteries

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Molecular Biology
  • Medicine(all)

Cite this

The multifunctional Ca2+/Calmodulin-dependent Kinase II δ (CaMKIIδ) controls neointima formation after carotid ligation and vascular smooth muscle cell proliferation through cell cycle regulation by p21. / Li, Weiwei; Li, Hui; Sanders, Philip N.; Mohler, Peter J.; Backs, Johannes; Olson, Eric N.; Anderson, Mark E.; Grumbach, Isabella M.

In: Journal of Biological Chemistry, Vol. 286, No. 10, 11.03.2011, p. 7990-7999.

Research output: Contribution to journalArticle

Li, Weiwei ; Li, Hui ; Sanders, Philip N. ; Mohler, Peter J. ; Backs, Johannes ; Olson, Eric N. ; Anderson, Mark E. ; Grumbach, Isabella M. / The multifunctional Ca2+/Calmodulin-dependent Kinase II δ (CaMKIIδ) controls neointima formation after carotid ligation and vascular smooth muscle cell proliferation through cell cycle regulation by p21. In: Journal of Biological Chemistry. 2011 ; Vol. 286, No. 10. pp. 7990-7999.
@article{2ca558b127fc4b3d8a20ef548e8dcca5,
title = "The multifunctional Ca2+/Calmodulin-dependent Kinase II δ (CaMKIIδ) controls neointima formation after carotid ligation and vascular smooth muscle cell proliferation through cell cycle regulation by p21",
abstract = "The multifunctional Ca2+/calmodulin-dependent protein kinase II (CaMKII) promotes vascular smooth muscle (VSMC) proliferation. However, the signaling pathways mediating CAMKII-dependent proliferative effects in vivo are poorly understood. This study tested the hypothesis that CaMKIIδ mediates neointimal proliferation after carotid artery ligation by regulating expression and activity of cell cycle regulators, particularly at the G1/S checkpoint. Data herein indicate that 14 days after carotid ligation, C57Bl/6 mice developed a marked neointima with robust CaMKII protein expression. In particular, only the CaMKII isoform δ was increased as demonstrated by quantitative RT-PCR. Genetic deletion of CaMKII δ prevented injury-induced neointimal hyperplasia and cell proliferation in the intima and media. In ligated carotids of control mice, the proliferative cell cycle markers cdk2, cyclin E, and cyclin D1 were activated. In contrast, in CaMKIIδ-/- mice, we detected a reduction in proliferative cell cycle regulators as well as an increase in the cell cycle inhibitor p21. This expression profile was confirmed in cultured CaMKIIδ-/- VSMC, in which cdk2 and cdk4 activity was decreased. Toward understanding how CAMKIIδ affects p53, a transcriptional regulator of p21, we examined p53 pathway components. Our data indicate that p53 is elevated in CAMKIIδ-/- VSMC, whereas phosphorylation of the p53-specific E3 ligase, Mdm2, was decreased. In conclusion, CaMKII stimulates neointima proliferation after vascular injury by regulating cell proliferation through inhibition of p21 and induction of Mdm-2-mediated degradation of p53.",
author = "Weiwei Li and Hui Li and Sanders, {Philip N.} and Mohler, {Peter J.} and Johannes Backs and Olson, {Eric N.} and Anderson, {Mark E.} and Grumbach, {Isabella M.}",
year = "2011",
month = "3",
day = "11",
doi = "10.1074/jbc.M110.163006",
language = "English (US)",
volume = "286",
pages = "7990--7999",
journal = "Journal of Biological Chemistry",
issn = "0021-9258",
publisher = "American Society for Biochemistry and Molecular Biology Inc.",
number = "10",

}

TY - JOUR

T1 - The multifunctional Ca2+/Calmodulin-dependent Kinase II δ (CaMKIIδ) controls neointima formation after carotid ligation and vascular smooth muscle cell proliferation through cell cycle regulation by p21

AU - Li, Weiwei

AU - Li, Hui

AU - Sanders, Philip N.

AU - Mohler, Peter J.

AU - Backs, Johannes

AU - Olson, Eric N.

AU - Anderson, Mark E.

AU - Grumbach, Isabella M.

PY - 2011/3/11

Y1 - 2011/3/11

N2 - The multifunctional Ca2+/calmodulin-dependent protein kinase II (CaMKII) promotes vascular smooth muscle (VSMC) proliferation. However, the signaling pathways mediating CAMKII-dependent proliferative effects in vivo are poorly understood. This study tested the hypothesis that CaMKIIδ mediates neointimal proliferation after carotid artery ligation by regulating expression and activity of cell cycle regulators, particularly at the G1/S checkpoint. Data herein indicate that 14 days after carotid ligation, C57Bl/6 mice developed a marked neointima with robust CaMKII protein expression. In particular, only the CaMKII isoform δ was increased as demonstrated by quantitative RT-PCR. Genetic deletion of CaMKII δ prevented injury-induced neointimal hyperplasia and cell proliferation in the intima and media. In ligated carotids of control mice, the proliferative cell cycle markers cdk2, cyclin E, and cyclin D1 were activated. In contrast, in CaMKIIδ-/- mice, we detected a reduction in proliferative cell cycle regulators as well as an increase in the cell cycle inhibitor p21. This expression profile was confirmed in cultured CaMKIIδ-/- VSMC, in which cdk2 and cdk4 activity was decreased. Toward understanding how CAMKIIδ affects p53, a transcriptional regulator of p21, we examined p53 pathway components. Our data indicate that p53 is elevated in CAMKIIδ-/- VSMC, whereas phosphorylation of the p53-specific E3 ligase, Mdm2, was decreased. In conclusion, CaMKII stimulates neointima proliferation after vascular injury by regulating cell proliferation through inhibition of p21 and induction of Mdm-2-mediated degradation of p53.

AB - The multifunctional Ca2+/calmodulin-dependent protein kinase II (CaMKII) promotes vascular smooth muscle (VSMC) proliferation. However, the signaling pathways mediating CAMKII-dependent proliferative effects in vivo are poorly understood. This study tested the hypothesis that CaMKIIδ mediates neointimal proliferation after carotid artery ligation by regulating expression and activity of cell cycle regulators, particularly at the G1/S checkpoint. Data herein indicate that 14 days after carotid ligation, C57Bl/6 mice developed a marked neointima with robust CaMKII protein expression. In particular, only the CaMKII isoform δ was increased as demonstrated by quantitative RT-PCR. Genetic deletion of CaMKII δ prevented injury-induced neointimal hyperplasia and cell proliferation in the intima and media. In ligated carotids of control mice, the proliferative cell cycle markers cdk2, cyclin E, and cyclin D1 were activated. In contrast, in CaMKIIδ-/- mice, we detected a reduction in proliferative cell cycle regulators as well as an increase in the cell cycle inhibitor p21. This expression profile was confirmed in cultured CaMKIIδ-/- VSMC, in which cdk2 and cdk4 activity was decreased. Toward understanding how CAMKIIδ affects p53, a transcriptional regulator of p21, we examined p53 pathway components. Our data indicate that p53 is elevated in CAMKIIδ-/- VSMC, whereas phosphorylation of the p53-specific E3 ligase, Mdm2, was decreased. In conclusion, CaMKII stimulates neointima proliferation after vascular injury by regulating cell proliferation through inhibition of p21 and induction of Mdm-2-mediated degradation of p53.

UR - http://www.scopus.com/inward/record.url?scp=79953149132&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79953149132&partnerID=8YFLogxK

U2 - 10.1074/jbc.M110.163006

DO - 10.1074/jbc.M110.163006

M3 - Article

VL - 286

SP - 7990

EP - 7999

JO - Journal of Biological Chemistry

JF - Journal of Biological Chemistry

SN - 0021-9258

IS - 10

ER -