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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Oncotarget
2016 ; 7
(2
): 1529-43
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Critical role of PPAR? in myeloid-derived suppressor cell-stimulated cancer cell
proliferation and metastasis
#MMPMID26625314
Zhao T
; Du H
; Blum JS
; Yan C
Oncotarget
2016[Jan]; 7
(2
): 1529-43
PMID26625314
show ga
Lysosomal acid lipase (LAL) is a key enzyme controlling neutral lipid metabolic
signaling in myeloid-derived suppressor cells (MDSCs). MDSCs from LAL-deficient
(lal-/-) mice directly stimulate cancer cell proliferation. PPAR? ligand
treatment inhibited lal-/- MDSCs stimulation of tumor cell growth and metastasis
in vivo, and tumor cell proliferation and migration in vitro. In addition, PPAR?
ligand treatment impaired lal-/- MDSCs transendothelial migration, and
differentiation from lineage-negative cells. The corrective effects of PPAR?
ligand on lal-/- MDSCs functions were mediated by regulating the mammalian target
of rapamycin (mTOR) pathway, and subsequently blocking MDSCs ROS overproduction.
Furthermore, in the myeloid-specific dominant-negative PPAR? (dnPPAR?)
overexpression bitransgenic mouse model, tumor growth and metastasis were
enhanced, and MDSCs from these mice stimulated tumor cell proliferation and
migration. MDSCs with dnPPAR? overexpression showed increased transendothelial
migration, overactivation of the mTOR pathway, and ROS overproduction. These
results indicate that PPAR? plays a critical role in neutral lipid metabolic
signaling controlled by LAL, which provides a mechanistic basis for clinically
targeting MDSCs to reduce the risk of cancer proliferation, growth and
metastasis.
|*Cell Communication/drug effects
[MESH]
|*Cell Movement/drug effects
[MESH]
|*Cell Proliferation/drug effects
[MESH]
|Animals
[MESH]
|Antigens, Ly/metabolism
[MESH]
|Carcinoma, Lewis Lung/genetics/*metabolism/secondary
[MESH]