백서 치주인대세포에서 Doxycycline의 Mefenamic Acid 병용사용 시 MMP-13 mRNA 발현 억제 효과
Inhibiton of MMP-13 mRNA expression by Doxycycline combination with Mefenamic Acid in the rat Periodontal ligament cells
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Abstract
It has been focused on the importance of the host inflammatory response in periodontal pathogenesis and progression, treatment has been introduced to control the host response and the method, which diminishes production and activity of MMP by doxycycline, has been used in periodontal field. MMP is a proteolytic enzyme which plays a major role in tissue destruction and MMP-1 is secreted in the periodontally healthy tissue, while MMP-8, 9, 13, etc in the inflammatory state. Among these, MMP-13 has been discovered lately and reported to degrade primarily type Ⅱ collagen. Periodontal ligament (PDL) cell plays a role in destruction of periodontal tissue. This study was to evaluate the effect of doxycycline and mefenamic acid, non-steroidal anti-inflammatory drug on MMP-13 mRNA expression in the rat PDL cell. Doxycycline concentration of 1~100 ㎍/㎖ was added rat PDL cell and cell activity was measured by MTT assay at day 1 and 3. MMP-13 gene expression was evaluated by RT-PCR after PDL cells were pre-treated for 1 hour with doxycycline (50 ㎍/㎖) alone or with mefenamic acid (10-6 M), then added IL-1β (1.0 ng/㎖) and incubated for 16 -18 hours. The results are as follows: 1. Cell activity decreased significantly at 24 and 72 hours in 100 ㎍/㎖ (p<0.05). 2. Level of MMP-13 mRNA was in 202% increase by IL-1β and in pre-treating doxycycline group, expression of IL-1β induced MMP-13 mRNA was inhibited by 31% than IL-1β treated only. 3. Mefenamic acid did not inhibit on the expression of IL-1β induced MMP-13 mRNA, while mefenamic acid in combination with doxycycline inhibited the expression by 41% compared to only IL-1β stimulation. These results suggest that doxycycline synergistically inhibit the expression of IL-1β induced MMP-13 mRNA in combination with mefenamic acid.
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