Activation of Rac1 by Src-dependent phosphorylation of Dock180 Y1811 mediates PDGFRα-stimulated glioma tumorigenesis in mice and humans

Haizhong Feng, Bo Hu*, Kun Wei Liu, Yanxin Li, Xinghua Lu, Tao Cheng, Jia Jean Yiin, Songjian Lu, Susan Keezer, Tim Fenton, Frank B. Furnari, Ronald L. Hamilton, Kristiina Vuori, Jann N. Sarkaria, Motoo Nagane, Ryo Nishikawa, Webster K. Cavenee, Shi Yuan Cheng

*Corresponding author for this work

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Two hallmarks of glioblastoma multiforme, the most common malignant brain cancer in humans, are aggressive growth and the ability of single glioma cells to disperse throughout the brain. These characteristics render tumors resistant to current therapies and account for the poor prognosis of patients. Although it is known that oncogenic signaling caused by overexpression of genes such as PDGFRA is responsible for robust glioma growth and cell infiltration, the mechanisms underlying glioblastoma malignancy remain largely elusive. Here, we report that PDGFRα signaling in glioblastomas leads to Src-dependent phosphorylation of the guanine nucleotide exchange factor Dock180 at tyrosine 1811 (Dock180 Y1811) that results in activation of the GTPase Rac1 and subsequent cell growth and invasion. In human glioma cells, knockdown of Dock180 and reversion with an RNAi-resistant Dock180 Y1811F abrogated, whereas an RNAi-resistant Dock180 WT rescued, PDGFRα-promoted glioma growth, survival, and invasion. Phosphorylation of Dock180 Y1811 enhanced its association with CrkII and p130 Cas, causing activation of Rac1 and consequent cell motility. Dock180 also associated with PDGFRα to promote cell migration. Finally, phosphorylated Dock180 Y1811 was detected in clinical samples of gliomas and various types of human cancers, and coexpression of phosphorylated Dock180 Y1811, phosphorylated Src Y418, and PDGFRα was predictive of extremely poor prognosis of patients with gliomas. Taken together, our findings provide insight into PDGFRα-stimulated gliomagenesis and suggest that phosphorylated Dock180 Y1811 contributes to activation of Rac1 in human cancers with PDGFRA amplification.

Original languageEnglish (US)
Pages (from-to)4670-4684
Number of pages15
JournalJournal of Clinical Investigation
Volume121
Issue number12
DOIs
StatePublished - Dec 1 2011

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Glioma
Tyrosine
Carcinogenesis
Phosphorylation
Glioblastoma
Growth
RNA Interference
Cell Movement
Neoplasms
Guanine Nucleotide Exchange Factors
GTP Phosphohydrolases
Brain Neoplasms
Survival
Brain
Genes

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Feng, Haizhong ; Hu, Bo ; Liu, Kun Wei ; Li, Yanxin ; Lu, Xinghua ; Cheng, Tao ; Yiin, Jia Jean ; Lu, Songjian ; Keezer, Susan ; Fenton, Tim ; Furnari, Frank B. ; Hamilton, Ronald L. ; Vuori, Kristiina ; Sarkaria, Jann N. ; Nagane, Motoo ; Nishikawa, Ryo ; Cavenee, Webster K. ; Cheng, Shi Yuan. / Activation of Rac1 by Src-dependent phosphorylation of Dock180 Y1811 mediates PDGFRα-stimulated glioma tumorigenesis in mice and humans. In: Journal of Clinical Investigation. 2011 ; Vol. 121, No. 12. pp. 4670-4684.
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title = "Activation of Rac1 by Src-dependent phosphorylation of Dock180 Y1811 mediates PDGFRα-stimulated glioma tumorigenesis in mice and humans",
abstract = "Two hallmarks of glioblastoma multiforme, the most common malignant brain cancer in humans, are aggressive growth and the ability of single glioma cells to disperse throughout the brain. These characteristics render tumors resistant to current therapies and account for the poor prognosis of patients. Although it is known that oncogenic signaling caused by overexpression of genes such as PDGFRA is responsible for robust glioma growth and cell infiltration, the mechanisms underlying glioblastoma malignancy remain largely elusive. Here, we report that PDGFRα signaling in glioblastomas leads to Src-dependent phosphorylation of the guanine nucleotide exchange factor Dock180 at tyrosine 1811 (Dock180 Y1811) that results in activation of the GTPase Rac1 and subsequent cell growth and invasion. In human glioma cells, knockdown of Dock180 and reversion with an RNAi-resistant Dock180 Y1811F abrogated, whereas an RNAi-resistant Dock180 WT rescued, PDGFRα-promoted glioma growth, survival, and invasion. Phosphorylation of Dock180 Y1811 enhanced its association with CrkII and p130 Cas, causing activation of Rac1 and consequent cell motility. Dock180 also associated with PDGFRα to promote cell migration. Finally, phosphorylated Dock180 Y1811 was detected in clinical samples of gliomas and various types of human cancers, and coexpression of phosphorylated Dock180 Y1811, phosphorylated Src Y418, and PDGFRα was predictive of extremely poor prognosis of patients with gliomas. Taken together, our findings provide insight into PDGFRα-stimulated gliomagenesis and suggest that phosphorylated Dock180 Y1811 contributes to activation of Rac1 in human cancers with PDGFRA amplification.",
author = "Haizhong Feng and Bo Hu and Liu, {Kun Wei} and Yanxin Li and Xinghua Lu and Tao Cheng and Yiin, {Jia Jean} and Songjian Lu and Susan Keezer and Tim Fenton and Furnari, {Frank B.} and Hamilton, {Ronald L.} and Kristiina Vuori and Sarkaria, {Jann N.} and Motoo Nagane and Ryo Nishikawa and Cavenee, {Webster K.} and Cheng, {Shi Yuan}",
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Feng, H, Hu, B, Liu, KW, Li, Y, Lu, X, Cheng, T, Yiin, JJ, Lu, S, Keezer, S, Fenton, T, Furnari, FB, Hamilton, RL, Vuori, K, Sarkaria, JN, Nagane, M, Nishikawa, R, Cavenee, WK & Cheng, SY 2011, 'Activation of Rac1 by Src-dependent phosphorylation of Dock180 Y1811 mediates PDGFRα-stimulated glioma tumorigenesis in mice and humans', Journal of Clinical Investigation, vol. 121, no. 12, pp. 4670-4684. https://doi.org/10.1172/JCI58559

Activation of Rac1 by Src-dependent phosphorylation of Dock180 Y1811 mediates PDGFRα-stimulated glioma tumorigenesis in mice and humans. / Feng, Haizhong; Hu, Bo; Liu, Kun Wei; Li, Yanxin; Lu, Xinghua; Cheng, Tao; Yiin, Jia Jean; Lu, Songjian; Keezer, Susan; Fenton, Tim; Furnari, Frank B.; Hamilton, Ronald L.; Vuori, Kristiina; Sarkaria, Jann N.; Nagane, Motoo; Nishikawa, Ryo; Cavenee, Webster K.; Cheng, Shi Yuan.

In: Journal of Clinical Investigation, Vol. 121, No. 12, 01.12.2011, p. 4670-4684.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Activation of Rac1 by Src-dependent phosphorylation of Dock180 Y1811 mediates PDGFRα-stimulated glioma tumorigenesis in mice and humans

AU - Feng, Haizhong

AU - Hu, Bo

AU - Liu, Kun Wei

AU - Li, Yanxin

AU - Lu, Xinghua

AU - Cheng, Tao

AU - Yiin, Jia Jean

AU - Lu, Songjian

AU - Keezer, Susan

AU - Fenton, Tim

AU - Furnari, Frank B.

AU - Hamilton, Ronald L.

AU - Vuori, Kristiina

AU - Sarkaria, Jann N.

AU - Nagane, Motoo

AU - Nishikawa, Ryo

AU - Cavenee, Webster K.

AU - Cheng, Shi Yuan

PY - 2011/12/1

Y1 - 2011/12/1

N2 - Two hallmarks of glioblastoma multiforme, the most common malignant brain cancer in humans, are aggressive growth and the ability of single glioma cells to disperse throughout the brain. These characteristics render tumors resistant to current therapies and account for the poor prognosis of patients. Although it is known that oncogenic signaling caused by overexpression of genes such as PDGFRA is responsible for robust glioma growth and cell infiltration, the mechanisms underlying glioblastoma malignancy remain largely elusive. Here, we report that PDGFRα signaling in glioblastomas leads to Src-dependent phosphorylation of the guanine nucleotide exchange factor Dock180 at tyrosine 1811 (Dock180 Y1811) that results in activation of the GTPase Rac1 and subsequent cell growth and invasion. In human glioma cells, knockdown of Dock180 and reversion with an RNAi-resistant Dock180 Y1811F abrogated, whereas an RNAi-resistant Dock180 WT rescued, PDGFRα-promoted glioma growth, survival, and invasion. Phosphorylation of Dock180 Y1811 enhanced its association with CrkII and p130 Cas, causing activation of Rac1 and consequent cell motility. Dock180 also associated with PDGFRα to promote cell migration. Finally, phosphorylated Dock180 Y1811 was detected in clinical samples of gliomas and various types of human cancers, and coexpression of phosphorylated Dock180 Y1811, phosphorylated Src Y418, and PDGFRα was predictive of extremely poor prognosis of patients with gliomas. Taken together, our findings provide insight into PDGFRα-stimulated gliomagenesis and suggest that phosphorylated Dock180 Y1811 contributes to activation of Rac1 in human cancers with PDGFRA amplification.

AB - Two hallmarks of glioblastoma multiforme, the most common malignant brain cancer in humans, are aggressive growth and the ability of single glioma cells to disperse throughout the brain. These characteristics render tumors resistant to current therapies and account for the poor prognosis of patients. Although it is known that oncogenic signaling caused by overexpression of genes such as PDGFRA is responsible for robust glioma growth and cell infiltration, the mechanisms underlying glioblastoma malignancy remain largely elusive. Here, we report that PDGFRα signaling in glioblastomas leads to Src-dependent phosphorylation of the guanine nucleotide exchange factor Dock180 at tyrosine 1811 (Dock180 Y1811) that results in activation of the GTPase Rac1 and subsequent cell growth and invasion. In human glioma cells, knockdown of Dock180 and reversion with an RNAi-resistant Dock180 Y1811F abrogated, whereas an RNAi-resistant Dock180 WT rescued, PDGFRα-promoted glioma growth, survival, and invasion. Phosphorylation of Dock180 Y1811 enhanced its association with CrkII and p130 Cas, causing activation of Rac1 and consequent cell motility. Dock180 also associated with PDGFRα to promote cell migration. Finally, phosphorylated Dock180 Y1811 was detected in clinical samples of gliomas and various types of human cancers, and coexpression of phosphorylated Dock180 Y1811, phosphorylated Src Y418, and PDGFRα was predictive of extremely poor prognosis of patients with gliomas. Taken together, our findings provide insight into PDGFRα-stimulated gliomagenesis and suggest that phosphorylated Dock180 Y1811 contributes to activation of Rac1 in human cancers with PDGFRA amplification.

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