생명과학회지 (Journal of Life Science)

  • 제28권8호
  • /
  • Pages.931-937
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  • 2018
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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트립톨라이드가 식이제한에 의한 수명연장과 노화관련 질환에 미치는 영향

Triptolide Mimics the Effect of Dietary Restriction on Lifespan and Retards Age-related Diseases in Caenorhabditis elegans

  • 백선미 (순천향대학교 의료과학대학 의료생명공학과) ;
  • 박상규 (순천향대학교 의료과학대학 의료생명공학과)
  • Beak, Sun-Mi (Department of Medical Biotechnology, College of Medical Sciences, Soonchunhyang University) ;
  • Park, Sang-Kyu (Department of Medical Biotechnology, College of Medical Sciences, Soonchunhyang University)
  • 투고 : 2018.03.19
  • 심사 : 2018.08.08
  • 발행 : 2018.08.30
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초록

뇌공등에 함유되어있는 트립톨라이드는 뛰어난 항염증, 항산화 효능을 가지고 있음이 보고되었다. 예쁜꼬마선충을 이용한 이전 연구에서 트립톨라이드의 섭취가 개체의 항스트레스 효능을 높이고, 수명을 연장시킴이 밝혀졌다. 본 연구에서는 트립톨라이드에 의한 수명연장에 관여하는 세포 내 기전과 트립톨라이드가 노화관련 질환인 당뇨병과 알츠하이머병에 미치는 영향을 평가하였다. 트립톨라이드는 인슐린/IGF-1-like 신호전달 저하에 의한 수명연장 돌연변이인 age-1과 미토콘드리아 전자 전달계 저하에 의한 수명연장 돌연변이인 clk-1의 수명을 유의적으로 증가시킨 반면, 식이제한 유도 돌연변이인 eat-2의 수명에는 유의적인 변화를 유도하지 못했다. 또한 박테리아 희석을 이용한 식이제한에 의해 연장된 수명을 추가적으로 더 연장시키지 못했다. 트립톨라이드 섭취는 고농도의 당 섭취에 의한 체내 독성과 사람 아밀로이드 베타 형질전환 유전자로 인한 체내 독성을 유의적으로 저하시켰다. 이러한 결과들은 트립톨라이드에 의한 수명연장이 식이제한에 의한 수명연장 기전과 중복되며, 트립톨라이드가 노화관련 질환을 저해하는 효능이 있음을 보여준다. 따라서, 트립톨라이드는 식이제한 효능을 대체할 수 있는 식의약품 개발에 활용될 수 있다.

Triptolide is a compound found in Tripterygium wilfordii and reported to have an anti-inflammatory and anti-oxidant activities. A previous study shows that the dietary supplementation with triptolide increases resistance to environmental stressors, including oxidative stress, heat shock, and ultraviolet irradiation, and extends lifespan in C. elegans. Here, we investigated the underlying mechanisms involved in the lifespan-extending effect of triptolide. The effect of triptolide on age-related diseases, such as diabetes mellitus and Alzheimer's disease, was also examined using animal disease models. The longevity phenotype conferred by triptolide was not observed in the eat-2 mutant, a well-known genetic model of dietary restriction, while there was an additional lifespan extension with triptolide in age-1 and clk-1 mutants. The long lifespan of age-1 mutant is resulted from a reduced insulin/IGF-1-like signaling and the clk-1 mutant lives longer than wild-type due to dysfunction of mitochondrial electron transport chain reaction. The effect of dietary restriction using bacterial dilution on lifespan also overlapped with that of triptolide. The toxicity of high glucose diet or transgenic human amyloid beta gene was significantly suppressed by the supplementation with triptolide. These findings suggest that triptolide can mimic the effect of dietary restriction on lifespan and onset of age-related diseases. We conclude that triptolide can be a strong candidate for the development of dietary restriction mimetics.

키워드

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