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Physicochemical Properties and Protective Effects of Corni fructus Treated with Pressurized-Steam against H2O2-Induced Cytotoxicity on L132 Cells

가압증숙공정에 의한 산수유의 이화학적 특성 및 과산화수소에 의해 유도된 산화적 L132 세포 사멸에 대한 보호 효과

  • Park, Hye-Mi (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Hong, Joo-Heon (Department of Food Science and Technology, Catholic University of Daegu)
  • 박혜미 (대구가톨릭대학교 식품공학전공) ;
  • 홍주헌 (대구가톨릭대학교 식품공학전공)
  • Received : 2017.05.26
  • Accepted : 2017.08.10
  • Published : 2017.09.30

Abstract

This study examined the physicochemical properties and protective effects of Corni fructus treated with pressurized-steam (through $121^{\circ}C$, $1.2kgf/cm^2$, 0.5 h, 1 h, 2 h, and 3 h) against $H_2O_2$-induced cytotoxicity on L132 cells. The color values of the untreated Corni fructus powder were higher than those of Corni fructus after the pressurized-steam treatment (PSC), and those of PSC improved with a decrease in treatment time. At the observation by pressurized-steam treatment for more than 2 h, the color was changed to black, and its gloss was lost. The major constituents in PSC (2 hours) were the total sugar (468.53 mg/g), reducing sugar (385.55 mg/g), and total phenol (37.32 mg/g), respectively. The main components in the free sugars of PSC (2 h) were fructose, glucose, and sucrose, at 207.72 mg/g, 219.40 mg/g, and 4.31 mg/g, respectively. The gallic acid in the phenol compounds and 5-(hydroxymethyl) furfural in the furan compounds of PSC (2 h) improved with increasing treatment time. The main components in iridoid glycoside of PSC (2 h) were morroniside, loganin, and lognic acid, which improved with decreasing treatment time. The L132 cell growth inhibition activities of all the extracts were significantly higher than that of the control. The protective effects against the $H_2O_2$-induced cytotoxicity on L132 cells of PSC (2 h) was 102.82% (at $1,000{\mu}g/mL$) higher than those of the other extracts. This suggests that Corni fructus by PSC is useful for functional food materials in the food industry.

본 연구에서는 가압증숙 산수유의 이화학적 품질특성 변화를 모니터링 하였고, 폐 표피세포 보호 효과에 대해 알아보기 위하여 인간유래 L132 세포주를 이용하여 과산화수소로 유도된 산화 스트레스 모델에서 가압증숙 산수유 추출물의 세포 사멸 억제 효과를 확인하였다. 색도에서 명도를 나타내는 L값은 무처리 산수유 분말에서 42.75로 가장 높게 나타났으며, 대조군에 비해 가압증숙 시간이 증가할수록 L값은 유의적으로 감소하였다. 적색도(a값) 및 황색도(b값) 역시 이와 유사한 경향을 나타내었는데, 외형을 살펴보면 2시간 이상 가압증숙 시 색이 검게 변하고 광택이 없어지는 경향을 나타내었다. 2시간 동안 가압증숙 시 총 당, 환원당 및 총 페놀 함량변화를 측정한 결과, 각각 468.53 mg/g, 385.55 mg/g 및 37.32 mg/g으로 나타났다. 유리당 조성은 fructose, glucose 및 sucrose 순이었으며, 2시간 동안 가압증숙 시 각각 207.72 mg/g, 219.40 mg/g 및 4.31 mg/g으로 낮은 함량을 나타내었다. 페놀화합물인 gallic acid 및 furan 화합물인 5-HMF는 대조군에 비해 가압증숙 시간이 증가할수록 함량이 유의적으로 높아짐을 확인하였으며(P<0.05), iridoid 배당체 조성은 morroniside, loganin 및 loganic acid 순으로 함유하고 있었고 2시간 동안 가압증숙 시 다소 낮아지는 경향을 나타내었다. 과산화수소에 의해 유도된 산화적 세포 사멸에 대한 추출물의 보호 효과를 확인하기 위해 가압증숙 산수유 추출물의 L132 세포 독성을 확인한 결과 $1,000{\mu}g/mL$ 농도까지 유의적으로 세포 사멸이 나타나지 않아 세포독성이 없음을 확인할 수 있었다. L132 세포 사멸에 대한 보호 효과는 모든 시료에서 1 mM $H_2O_2$를 첨가한 군과 비교하여 활성이 유의적으로 증가하였으며, 특히 2시간 동안 가압증숙한 산수유 추출물을 $1,000{\mu}g/mL$ 농도로 첨가하였을 때 102.82%로 활성이 가장 크게 증가하여 과산화수소에 의해 유도된 산화적 세포 사멸에 대한 높은 세포 보호 효과를 나타냄을 확인하였다.

Keywords

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