In vivo expression of Toll-like receptor 2, Toll-like receptor 4, CSF2 and LY64 in Chinese chronic periodontitis patients.
OBJECTIVE
Toll-like receptors (TLRs) are the essential components in the innate and adaptive immune systems. Colony stimulating factor 2 (CSF2) is a cytokine that may prevent endotoxin tolerance, and LY64 has the ability to interfere with the recognition of bacteria via TLR4. The aim of this study was to explore the in vivo expressions of TLR2, TLR4, CSF2 and LY64 in Chinese chronic periodontitis patients.


METHODS
Gingival biopsies were collected from 24 chronic periodontitis patients and 19 healthy controls. The gene expression profiles of TLR2, TLR4, CSF2 and LY64 were investigated by real-time polymerase chain reaction, and the protein expressions of TLR2 and TLR4 were detected by immunohistochemistry. In addition, the levels of CSF2 in gingival crevicular fluid (GCF) were determined by ELISA.


RESULTS
The higher mRNA expressions of TLR2, TLR4 and CSF2, and the lower mRNA expression of LY64 were detected in chronic periodontitis patients. And the increased protein expressions of TLR2 and TLR4 were confirmed by immunohistochemistry. In addition, the increase of total amount of CSF2 in GCF was observed in chronic periodontitis patients.


CONCLUSIONS
Our results suggest that TLR2 and TLR4 may play a role in periodontal pathogenesis. In addition, CSF2 and LY64 may contribute to the regulation of inflammatory response and maintaining periodontal homeostasis.
Sun
Y
Y
Department of Periodontology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
Guo
Q-M
QM
Liu
D-L
DL
Zhang
M-Z
MZ
Shu
R
R
D000328:Adult; D000368:Aged; D015703:Antigens, CD / Q000235:genetics / Q000378:metabolism*; D016022:Case-Control Studies; D002681:China; D055113:Chronic Periodontitis / Q000208:ethnology / Q000378:metabolism*; D005260:Female; D005881:Gingiva / Q000378:metabolism; D005883:Gingival Crevicular Fluid / Q000378:metabolism; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D012333:RNA, Messenger / Q000032:analysis; D012016:Reference Values; D051195:Toll-Like Receptor 2 / Q000235:genetics / Q000378:metabolism*; D051197:Toll-Like Receptor 4 / Q000235:genetics / Q000378:metabolism*
D015703:Antigens, CD; C092722:CD180 protein, human; D012333:RNA, Messenger; C495342:TLR2 protein, human; C495345:TLR4 protein, human; D051195:Toll-Like Receptor 2; D051197:Toll-Like Receptor 4; D016178:Granulocyte-Macrophage Colony-Stimulating Factor