Genipin inhibits MMP-1 and MMP-3 release from TNF-α-stimulated human periodontal ligament cells

Genipin, the aglycon of geniposide found in gardenia fruit has long been considered for treatment of inflammatory diseases in traditional oriental medicine. Genipin has recently been reported to have some pharmacological functions, such as antimicrobial, antitumor, and anti-inflammatory effects. The aim of this study was to examine whether genipin could modify matrix metalloproteinase (MMP)-1 and MMP-3, which are related to the destruction of periodontal tissues in periodontal lesion, expression in tumor necrosis factor (TNF)-a-stimulated human periodontal ligament cells (HPDLCs). Genipin prevented TNF-a- mediated MMP-1 and MMP-3 productions in HPDLCs. Moreover, genipin could suppress not only extracellular signal-regulated kinase (ERK) and Jun-N-terminal kinase (JNK) phosphorylations but also AMP-activated protein kinase (AMPK) phosphorylation in TNF-a-stimulated HPDLCs. Inhibitors of ERK and AMPK could inhibit both MMP-1 and MMP-3 productions. Moreover, we revealed the ERK inhibitor suppressed AMPK phosphorylation in TNF-a-stimulated HPDLCs. These data provide a new mechanism through which genipin could be used for the treatment of periodontal disease to prevent MMPs expression in periodontal lesion.

内容要旨・審査要旨・論文本文の公開：
内容要旨：LID201704261014.pdf
審査要旨：LID201704261015.pdf
論文本文：LID201704261016.pdf
本論文は, 著者Satoru Shindoの学位論文として提出され, 学位審査・授与の対象となっている。