SCF and TLR4 ligand cooperate to augment the tumor-promoting potential of mast cells
| Autor: | Gui-Mei Zhang, Ye Yuan, Jing-Jing Wei, Bin Yan, Chuan-Wang Song, Qi Wang, Ling-Cong Sun, Jian-Hua Zhu, Sheng-Jun Liao, Zuo-Hua Feng, Dong Li |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
MAPK/ERK pathway
Lipopolysaccharides Cancer Research Immunology Blotting Western Stem cell factor Bone Marrow Cells Ligands Cell Degranulation Glycogen Synthase Kinase 3 Mice Cell Movement Cell Line Tumor Cromolyn Sodium medicine Tumor Microenvironment Immunology and Allergy Animals Mast Cells Phosphorylation PI3K/AKT/mTOR pathway Cells Cultured Tumor microenvironment Mice Inbred BALB C Stem Cell Factor Glycogen Synthase Kinase 3 beta biology Reverse Transcriptase Polymerase Chain Reaction Degranulation Neoplasms Experimental Mast cell Interleukin-12 Cell biology Interleukin-10 Tumor Burden Mice Inbred C57BL Toll-Like Receptor 4 medicine.anatomical_structure Oncology Cell culture biology.protein Platelet-derived growth factor receptor |
| Zdroj: | Cancer immunology, immunotherapy : CII. 61(3) |
| ISSN: | 1432-0851 |
| Popis: | Mast cells may have either antitumor or tumor-promoting potential. Nevertheless, mast cells in tumor microenvironment have been found to promote tumor growth. So far the mechanisms underlying the modulation of mast cell function in tumor microenvironment remains to be fully elucidated. Here, we report that tumor-promoting potential of mast cells could be augmented by molecules released from damaged tumor cells through cooperative stimulation of stem cell factor (SCF) and ligand for Toll-like receptor 4 (TLR4). Co-simulation with SCF and TLR4 ligand inhibited mast cell degranulation, but efficiently induced the production and secretion of VEGF, PDGF, and IL-10. Although TLR4 ligand alone may induce IL-12 expression in mast cells, co-stimulation with SCF and TLR4 ligand induced the expression of IL-10, but not IL-12, in mast cells. The phosphorylation of GSK3β was crucial for the effect of SCF and TLR4 ligand. In addition to inducing phosphorylation of GSK3β at Ser9 through PI3K pathway, SCF and TLR4 ligand cooperated to induce phosphorylation of GSK3β at Tyr216 by simultaneous activation of ERK and p38MAPK pathways. Both phospho-Ser9 and phospho-Tyr216 of GSK3β were required for IL-10 expression induced by SCF/TLR4 ligand, whereas suppressive effect of SCF/TLR4 ligand on mast cell degranulation was related to phospho-Tyr216. Importantly, the effect of SCF and TLR4 ligand on mast cells could be abrogated by inhibiting phosphorylation of GSK3β at Tyr216. These findings disclose the mechanisms underlying the modulation of mast cell function in tumor microenvironment, and suggest that inhibiting GSK3β in mast cells will be beneficial to the treatment of cancer. |
| Databáze: | OpenAIRE |
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