Title : Polarization of tumor-associated macrophages and Gas6/Axl signaling in oral squamous cell carcinoma
Author : Kuo-Chou Chiu et al
Date : July 2015
Post : Volume 51, Issue 7, Pages 683–689
Summary
Background
This study investigated the potential involvement of Axl signaling in polarization of tumor-associated macrophages (TAMs) in oral squamous cell carcinoma (OSCC).
Methods
Condition medium (CM) from OSCC cells (OEC-M1 and YD38) were collected and their effects on macrophage (THP-1) polarization were examined. Modulation of Axl, PI3/Akt, and NF-κB were performed to investigate their potential involvement in TAM polarization. Expression of pAxl and CD206 were analyzed by immunohistochemistry in OSCC tissues.
Results
THP-1 polarized to M2 phenotype with increasing expression of interleukins, vascular endothelial growth factor, matrix metalloproteinase and CD206 upon treatment with CM of OSCC. Activated Axl signaling in OSCC enhanced M2 induction ability. Suppression of Axl signaling and inhibition of PI3/Akt and NF-κB diminished M2 induction. pAxl expression was significantly associated with distribution of CD206 positive cells in OSCC tissues.
Conclusion
Axl signaling of OSCC involved in polarizing TAMs toward M2 phenotype. Induction of M2 phenotype macrophage polarization by OSCC cells might involve the Axl/PI3/Akt/NF-κB pathway.
Abbreviations
- OSCC, oral squamous cell carcinoma, Gas6/Axl, macrophage polarization, Akt/NF-κB, IHC, immunohistochemistry
Keywords
- Axl;
- Microenvironment;
- Oral squamous cell carcinoma;
- Tumor-associated macrophage
Title : Polarization of tumor-associated macrophages and Gas6/Axl signaling in oral squamous cell carcinoma
Author : Kuo-Chou Chiu et al
Date : July 2015
Post : Volume 51, Issue 7, Pages 683–689
Summary
Background
This study investigated the potential involvement of Axl signaling in polarization of tumor-associated macrophages (TAMs) in oral squamous cell carcinoma (OSCC).
Methods
Condition medium (CM) from OSCC cells (OEC-M1 and YD38) were collected and their effects on macrophage (THP-1) polarization were examined. Modulation of Axl, PI3/Akt, and NF-κB were performed to investigate their potential involvement in TAM polarization. Expression of pAxl and CD206 were analyzed by immunohistochemistry in OSCC tissues.
Results
THP-1 polarized to M2 phenotype with increasing expression of interleukins, vascular endothelial growth factor, matrix metalloproteinase and CD206 upon treatment with CM of OSCC. Activated Axl signaling in OSCC enhanced M2 induction ability. Suppression of Axl signaling and inhibition of PI3/Akt and NF-κB diminished M2 induction. pAxl expression was significantly associated with distribution of CD206 positive cells in OSCC tissues.
Conclusion
Axl signaling of OSCC involved in polarizing TAMs toward M2 phenotype. Induction of M2 phenotype macrophage polarization by OSCC cells might involve the Axl/PI3/Akt/NF-κB pathway.
Abbreviations
Keywords