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Effect of cytosolic phospholipase A2 on proinflammatory cytokine-induced bone resorptive genes including receptor activator of nuclear factor kappa B ligand in human dental pulp cells.
J Endod. 2010 Apr; 36(4):636-41.JE

Abstract

INTRODUCTION

Although cytokines stimulate prostaglandin E(2) (PGE(2)) production and cyclooxygenase-2 (COX-2) gene expression in human dental pulp cells (HDPCs), the involvement of cytosolic phospholipase A(2) (cPLA(2)) has not been assessed. The purpose of this study was to examine the role of cPLA(2) on the regulation of proinflammatory cytokine-stimulated genes associated with osteoclast differentiation or bone resorption.

METHODS

Tumor necrosis factor-alpha (TNF-alpha) and interleukin-1alpha (IL-1alpha)-induced COX-2 and receptor activator of nuclear factor kappa B ligand (RANKL) mRNA and protein expression in the HDPCs was determined by using reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analysis. PGE(2) release and osteoclast-related gene expression were measured by enzyme-linked immunosorbent assay and RT-PCR.

RESULTS

Stimulation with TNF-alpha and IL-1alpha synergistically increased levels of COX-2 as well as RANKL mRNA and protein expression. Osteoclast markers (macrophage colony-stimulating factor [M-CSF], matrix metalloproteinase-9 [MMP-9], and tartrate-resistant acid phosphatase [TRAP]) and osteolysis regulating cytokines or osteoclastogenic cytokines (IL-6, IL-11, and Il-17) were up-regulated in HDPCs after IL-1alpha and TNF-alpha treatment. A cPLA(2) inhibitor attenuated both the cytokine-stimulated PGE(2) release as well as changes in osteoclast differentiation-related genes like RANKL.

CONCLUSIONS

These results suggest that cPLA(2) is involved in inflammatory cytokine-induced osteoclastogenic gene expression and consequent damage or destruction.

Authors+Show Affiliations

Department of Oral & Maxillofacial Pathology, College of Dentistry, Wonkwang University, Iksan, South Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20307736

Citation

Kim, Young-Suk, et al. "Effect of Cytosolic Phospholipase A2 On Proinflammatory Cytokine-induced Bone Resorptive Genes Including Receptor Activator of Nuclear Factor Kappa B Ligand in Human Dental Pulp Cells." Journal of Endodontics, vol. 36, no. 4, 2010, pp. 636-41.
Kim YS, Min KS, Lee HD, et al. Effect of cytosolic phospholipase A2 on proinflammatory cytokine-induced bone resorptive genes including receptor activator of nuclear factor kappa B ligand in human dental pulp cells. J Endod. 2010;36(4):636-41.
Kim, Y. S., Min, K. S., Lee, H. D., Oh, H. W., & Kim, E. C. (2010). Effect of cytosolic phospholipase A2 on proinflammatory cytokine-induced bone resorptive genes including receptor activator of nuclear factor kappa B ligand in human dental pulp cells. Journal of Endodontics, 36(4), 636-41. https://doi.org/10.1016/j.joen.2009.12.009
Kim YS, et al. Effect of Cytosolic Phospholipase A2 On Proinflammatory Cytokine-induced Bone Resorptive Genes Including Receptor Activator of Nuclear Factor Kappa B Ligand in Human Dental Pulp Cells. J Endod. 2010;36(4):636-41. PubMed PMID: 20307736.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of cytosolic phospholipase A2 on proinflammatory cytokine-induced bone resorptive genes including receptor activator of nuclear factor kappa B ligand in human dental pulp cells. AU - Kim,Young-Suk, AU - Min,Kyung-San, AU - Lee,Hae-Doo, AU - Oh,Hyo-Won, AU - Kim,Eun-Cheol, PY - 2009/09/22/received PY - 2009/12/08/revised PY - 2009/12/12/accepted PY - 2010/3/24/entrez PY - 2010/3/24/pubmed PY - 2010/6/19/medline SP - 636 EP - 41 JF - Journal of endodontics JO - J Endod VL - 36 IS - 4 N2 - INTRODUCTION: Although cytokines stimulate prostaglandin E(2) (PGE(2)) production and cyclooxygenase-2 (COX-2) gene expression in human dental pulp cells (HDPCs), the involvement of cytosolic phospholipase A(2) (cPLA(2)) has not been assessed. The purpose of this study was to examine the role of cPLA(2) on the regulation of proinflammatory cytokine-stimulated genes associated with osteoclast differentiation or bone resorption. METHODS: Tumor necrosis factor-alpha (TNF-alpha) and interleukin-1alpha (IL-1alpha)-induced COX-2 and receptor activator of nuclear factor kappa B ligand (RANKL) mRNA and protein expression in the HDPCs was determined by using reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analysis. PGE(2) release and osteoclast-related gene expression were measured by enzyme-linked immunosorbent assay and RT-PCR. RESULTS: Stimulation with TNF-alpha and IL-1alpha synergistically increased levels of COX-2 as well as RANKL mRNA and protein expression. Osteoclast markers (macrophage colony-stimulating factor [M-CSF], matrix metalloproteinase-9 [MMP-9], and tartrate-resistant acid phosphatase [TRAP]) and osteolysis regulating cytokines or osteoclastogenic cytokines (IL-6, IL-11, and Il-17) were up-regulated in HDPCs after IL-1alpha and TNF-alpha treatment. A cPLA(2) inhibitor attenuated both the cytokine-stimulated PGE(2) release as well as changes in osteoclast differentiation-related genes like RANKL. CONCLUSIONS: These results suggest that cPLA(2) is involved in inflammatory cytokine-induced osteoclastogenic gene expression and consequent damage or destruction. SN - 1878-3554 UR - https://www.unboundmedicine.com/medline/citation/20307736/Effect_of_cytosolic_phospholipase_A2_on_proinflammatory_cytokine_induced_bone_resorptive_genes_including_receptor_activator_of_nuclear_factor_kappa_B_ligand_in_human_dental_pulp_cells_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0099-2399(09)01061-9 DB - PRIME DP - Unbound Medicine ER -