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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한한방내과학회 대한한방내과학회지 대한한방내과학회지 제34권 제2호
발행연도
2013.1
수록면
204 - 214 (11page)

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Objectives : This study was designed to investigate the cellular and molecular mechanisms of anti-inflammatory activity of the water extract of Polygala tenuifolia Willd. (Pt-WE). Methods : Using lipopolysaccharide (LPS)-stimulated murine RAW264.7 cells, we examined inflammatory mediators such as nitric oxide (NO), inducible NO synthase (iNOS), cyclooxygenase (COX)-2 and prostaglandin E2 (PGE2). Also, the inhibitory effect of Pt-WE on the activity of activator protein 1 (AP-1) and upstream signaling molecules was evaluated. To assess the protective effect of Pt-WE on hydrochloride/ethanol (HCl/EtOH)-induced gastric ulcer in mice, we compared Pt-WE (200 mg/kg) with ranitidine (50 mg/kg) treated mice's gastric mucosa, based on gross observations. Results : Pt-WE inhibited LPS-induced production of NO, PGE2 in a dose-dependent manner, without causing cytotoxicity. Pt-WE suppressed AP-1 activation by reducing generations of both c-Jun and c-Fos. In addition, Pt-WE inhibited the p-MKK 4/7 (mitogen-activated protein kinase kinase 4/7) and p-JNK (c-Jun N-terminal kinase) 1 in LPS-stimulated RAW264.7 cells. HCl/EtOH-induced gastric ulcer lesions were inhibited by pre-treatment of Pt-WE based on gross observations. In addition, Pt-WE decreased the phosphorylation level of JNK. Conclusions : These results demonstrate that Pt-WE has anti-inflammatory and gastroprotective effects. Thus, Pt-WE may be used widely in treatment of not only neurodegenerative diseases but also inflammatory diseases.

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