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ID 21531
file
creator
Kitagawa, Shoji
Hiraoka, Masae
Saito, Akihisa
Sato, Sunao
subject
Chemokine
Lipopolysaccharide
Polymorphonuclear leukocyte
Periodontitis
Animal study
NDC
Medical sciences
abstract
Accumulating evidence indicates that an important event in the tissue response in periodontal disease is the recruitment of polymorphonuclear leukocytes (PMN). This study investigated immunohistochemical expression of CXC-chemokines, including macrophage inflammatory protein-2 (MIP-2) and cytokine-induced neutrophil chemoattractant-2 (CINC-2) in rat periodontal tissue at 1 and 3 hours and 1, 2, 3 and 7 days after topical application of lipopolysaccharide (LPS; 5 mg/ml in saline) from E. Coli into the rat molar gingival sulcus. In normal periodontal tissues before LPS application, a small number of MIP-2 and CINC-2 positive cells were seen in junctional epithelium (JE) especially in its coronal half. After topical application of LPS, a prominent increase of MIP-2 and CINC-2 positive JE cells was observed. Almost all JE cells strongly expressed them at day 1 and day 2, and then the number of chemokine-positive cells returned to normal at day 7. Corresponding to these chemokine expressions, LPS application induced a significant increase in number of PMNs in sub-JE area at 1 hour (P <0.01) and 3 hours (P <0.05) and a significant increase in JE area at 1 day(P< 0.05) and 2 days (P <0.01), indicating a dynamic flow of PMNs from the sub-JE area into JE.

These findings indicated that JE cells produced MIP-2 and CINC-2 in response to LPS stimulation and suggested that MIP-2 and CINC-2 may be responsible for PMN migration toward the periodontal pathogen and may play an important role in the initiation of inflammation and subsequent periodontal tissue destruction.
journal title
Histochemistry and Cell Biology
volume
Volume 121
issue
Issue 4
start page
291
end page
297
date of issued
2004-03-24
publisher
Springer
issn
0948-6143
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2004 Springer-Verlag. "The original publication is available at www.springerlink.com"
relation url
department
Graduate School of Biomedical Science