In vitro investigation on the mechanism of cyclooxygenase-2 upregulation induced by spleen tyrosine kinase-nuclear factor κB signaling in cancer pain caused by oral cancer-associated macrophage.
- Author:
Jie LIN
1
;
Miao WANG
2
Author Information
- Publication Type:Journal Article
- Keywords: cancer pain; cyclooxygenase-2; macrophage; mouth neoplasm
- MeSH: Animals; Cancer Pain; Cyclooxygenase 2; Macrophage Colony-Stimulating Factor; Macrophages; Mice; Mouth Neoplasms; NF-kappa B; Phosphorylation; Signal Transduction; Spleen; Syk Kinase; Up-Regulation
- From: West China Journal of Stomatology 2016;34(5):454-458
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVEThis study explores the mechanism of cyclooxygenase-2 (COX-2) upregulation in oral cancers associated with macrophage by using molecular biology techniques and primary culture of murine macrophage.
METHODSMurine macrophage was induced by macrophage colony-stimulating factor (M-CSF) and Cal27 conditional medium (CM). Purity of the macrophage was detected through CD68 immunofluorescence staining. Inhibitors of spleen tyrosine kinase (Syk) and nuclear factor κB (NFκB) were used to inhibit these pathways. In addition, real-time polymerase chain reaction and Western blot analysis were used to detect alterations in COX-2 and pathway-related proteins.
RESULTSAll of the induced cells specifically expressed CD68. Cal27 CM could significantly induce COX-2 expression (P<0.001). Moreover, inhibition of Syk pathway attenuated NFκB-P65 phosphorylation and reduced COX-2 expression (P<0.01), and inhibition of NFκB pathway exerted no effects on Syk phosphorylation but significantly inhibited COX-2 upregulation (P<0.01).
CONCLUSIONSSyk-NFκB is responsible for COX-2 overexpression in oral cancer associated with macrophages. Targeting this pathway is possibly a new approach to control oral cancer-related pain. .
