Ethyl linoleate inhibits inflammatory reaction induced by titanium particles and its mechanism

doi:10.3969/j.issn.2095-4344.2016.52.012

Abstract

Abstract:

BACKGROUND: Ethyl linoleate has been proved to attenuate the inflammatory-cytokines release induced by lipopolysaccharide, but whether it can inhibit titanium-induced osteolysis and the underlying mechanism remain unclear.
OBJECTIVE: To observe the effect of ethyl linoleate on the expression of inflammatory-related factors induced by titanium particles and explore its mechanism.
METHODS: Forty-eight Kunming mice were randomly divided into blank control, titanium, dimethylsulfoxide (DMSO) and experimental groups. The back air pouch Inflammatory models were established in the mice of the titanium, DMSO and experimental groups, in which the 200 µL menstruum of DMSO (0.5%) and 200 µL ethyl linoleate (0.5%) were respectively administered into the pouch of the mice at 12 hours. Mice in the blank control group received no intervention. Fourteen days later, the inflammatory cell infiltration in the skin was examined through hematoxylin-eosin staining; the expression levels of inhibitor κB-α, nuclear factor-κB, inducible nitric oxide synthase, cyclooxygenase-2, tumor necrosis factor-α and interleukin-6 as well as ERK, p-ERK, JNK, p-JNK, p38 and p-p38 in MAPK signaling pathways were evaluated by western blot assay.
RESULTS AND CONCLUSION: In the titanium group and DMSO group, there were numerous inflammatory cells and vacuole-like necrotic tissues in the hair follicle lacuna of dermis and loose connective tissues of hypodermis. The experiment group showed significant reduction in inflammatory cell infiltration and vacuole-like necrosis. Compared with the blank control group, the expression levels of inducible nitric oxide synthase, cyclooxygenase-2, nuclear factor-κB, tumor necrosis factor-α, interleukin-6, ERK, JNK and p38 in the DMSO and titanium groups were significantly increased, while inhibitor κB-α significantly decreased (P < 0.05). Compared with the DMSO and titanium groups, there were significantly down-regulated levels of inducible nitric oxide synthase, cyclooxygenase-2, nuclear factor-κB, tumor necrosis factor-α, interleukin-6, ERK, JNK and p38, and up-regulated inhibitor κB-α level in the experimental group (P < 0.05). In conclusion, ethyl linoleate can remarkably suppress the expressions of titanium-induced inflammatory factors associated with the inhibition of nuclear factor-κB and MAPK signaling pathway activation.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Titanium, Inflammation, NF-κappa B, Tissue Engineering

CLC Number:

R318

Liu Guo-dong, Xin Bing, Huang Dong, Zheng Bai, Sun Bai-han, Guo Kai-jin.

Ethyl linoleate inhibits inflammatory reaction induced by titanium particles and its mechanism

[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(52): 7836-7843.

Figures/Tables 5

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