생명과학회지 (Journal of Life Science)

  • 제20권10호
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  • Pages.1443-1450
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  • 2010
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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Honokiol에 의한 토끼의 무릎 연골세포에서 PI-3K/AKT pathway를 통하여 nitric oxide에 의해 유도되는 세포사멸의 억제

Honokiol Inhibits Nitric Oxide-Induced Apoptosis in Rabbit Articular Chondrocytes via PI-3K/AKT Pathway

  • 이원길 (공주대학교 자연과학대학 생명과학과) ;
  • 김송자 (공주대학교 자연과학대학 생명과학과)
  • Lee, Won-Kil (Department of Biological Sciences, College of Natural Sciences, Kongju National University) ;
  • Kim, Song-Ja (Department of Biological Sciences, College of Natural Sciences, Kongju National University)
  • 투고 : 2010.07.29
  • 심사 : 2010.10.09
  • 발행 : 2010.10.30
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초록

Honokiol은 작은 분자량을 갖는 중국의 약초인 'Magnolia officinalis'에서 추출한 리간드로서 중국과 일본에서 전통 의약제로 사용되어 왔다. 이전 연구에서는 honokiol이 다양한 종류의 암에서anti-angiogenic, anti-invasive, anti-proliferative activities 등의 다양한 효과가 있는 것으로 알려져 있다. 우리는 이전 연구에서 Nitric oxide donor인 sodium nitroprusside (SNP)에 의해서 토끼 무릎관절연골세포에서 세포사멸이 일어나는 것을 보고하였다. 본 연구에서는 무릎 연골세포에서 NO에 의해 유도되는 세포사멸이 honokiol 처리농도에 의존적으로 억제되는 것을 세포형태, MTT assay, Western blot analysis 그리고 FACS를 통해 확인할 수 있었다. 또한, honokiol은 SNP에 의해 유도되는 p53의 발현 및 pro-caspase-3의 활성 저해, DNA fragmentation을 억제하였다. Honokiol에 의한 세포사멸 억제는 PI-3K의 특정 저해제인 LY294002를 SNP와 honokiol과 함께 처리하였을 때 세포의 사멸이 증가하는 것을 확인할 수 있었다. 이는 honokiol이 PI-3K/AKT pathway를 통하여 NO가 유도하는 세포사멸을 억제하는 것을 의미한다.

Honokiol is a small molecular weight ligand originally isolated from the Chinese medicinal herb Magnolia officinalis, a plant used in traditional Chinese and Japanese medicine [9]. In a previous study, the effects of honokiol were shown to have anti-angiogenic, anti-invasive and anti-proliferative activities in a variety of cancers [1,3,4,11,13,17,24,29,30]. We showed previously that direct production of nitric oxide (NO) by treatment of NO donor, sodium nitroprusside (SNP), led to apoptosis in rabbit articular chondrocytes [15,16]. This study confirmed that NO-induced apoptosis was suppressed by honokiol treatment in a dose-dependent manner as determined by cell phenotype, MTT assay, Western blot analysis and FACS analysis in articular chondrocytes. Treatment of honokiol inhibited SNP-induced expression of p53 as well as DNA fragmentation in articular chondrocytes, but increased expressionof pro-caspase-3. Inhibition of SNP-induced apoptosis by honokiol treatment was rescued by LY294002, the specific inhibitors of phosphoinositide 3-kinase (PI-3K) in articular chondrocytes. Our results indicate that honokiol inhibits NO-induced apoptosis via PI-3K/AKT pathway in rabbit articular chondrocytes.

키워드

참고문헌

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