Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effects of Acorn Powder on Lifespan and a Resistance to Oxidative Stress in Caenorhabditis elegans

도토리 분말이 선충의 산화성 스트레스 저항성과 수명에 미치는 효과

  • Lee, Soon-Young (Dept. of Medical Biotechnology, College of Medical Sciences, Soonchunhyang University) ;
  • Lee, Jin-Sun (Dept. of Medical Biotechnology, College of Medical Sciences, Soonchunhyang University) ;
  • Park, Sang-Kyu (Dept. of Medical Biotechnology, College of Medical Sciences, Soonchunhyang University)
  • 이순영 (순천향대학교 의료과학대학 의료생명공학과) ;
  • 이진선 (순천향대학교 의료과학대학 의료생명공학과) ;
  • 박상규 (순천향대학교 의료과학대학 의료생명공학과)
  • Received : 2013.01.14
  • Accepted : 2013.02.22
  • Published : 2013.05.31
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Abstract

The free radical theory of aging suggests that oxidative damage caused by free radicals plays a key role in normal aging. We measured the anti-oxidant activity of acorns and asked whether it can modulate the aging process in Caenorhabditis elegans. Different concentrations of acorn powder were added to culture medium, followed by the monitoring of fertility and survival under oxidative stress. The anti-oxidant activity of 500 mg/L of acorn powder exhibited significant increases in the resistance to oxidative stress in vivo. Acorn powder also significantly extended both the mean and maximum lifespan of C. elegans (the mean lifespan was increased up to 22.4%). The fertility assay indicates the lifespan extension from acorn does not accompany a reduced reproduction, which is common in long-lived mutants. These findings indicate that acorn has a strong antioxidant activity and can induce longevity without the trade-off of reduced reproduction in C. elegans.

도토리의 항산화 효능을 평가하기 위해 선충을 실험동물로 사용하여 생체 내 산화성 스트레스에 대한 저항성을 평가하였다. 배양배지에 50, 100, 500, 1,000 mg/L 농도의 도토리 분말 수용액을 첨가하여 산화성 스트레스 하에서의 생존률을 비교한 결과, 500 mg/L의 농도에서 유의적인 생존률 증가를 관찰할 수 있었다. 그 다음 위의 생체 내 항산화 효능 농도에서 도토리 분말 수용액이 개체의 수명에 미치는 영향을 측정하였다. 그 결과 도토리 분말 수용액을 첨가한 배양배지에서 키운 선충이 대조군에 비해 유의적으로 증가된 평균 수명과 최대 수명을 가지는 것을 관찰하였다. 이는 도토리 분말 수용액이 생체 내에서 항산화 효능을 발휘하여 노화에 따른 세포 내 물질의 산화적 손상을 완화시키고, 그로 인해 개체의 수명 연장까지 일으킨 것으로 사료된다. 또한 번식률 변화를 관찰한 결과, 도토리 분말 수용액은 개체의 번식률에는 영향을 미치지 않는 것으로 나타났다. 이는 기존의 많은 수명 연장 표현형을 보이는 돌연변이 선충들에서의 결과와는 상반되는 것으로, 도토리 분말 수용액의 경우에는 번식력 감소를 수반하지 않고서도 수명 연장이 가능하다는 것을 보여준다. 본 연구의 결과는 향후 도토리를 이용한 항산화, 항노화 기능성 식품 개발과 같은 응용 연구 분야와 도토리의 생체 기능성과 관련 기전 연구와 같은 기초 연구 분야에도 널리 활용될 것으로 사료된다.

Keywords

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