Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Isolation of the Anti-tumor Promoters from Citrus Peels

감귤과피로부터 발암 promotion 억제활성성분의 분리

  • Yoon, Chang-Hoon (Department of Food Science and Nutrition, Jeju National University) ;
  • Jwa, Seung-Mi (Department of Food Science and Nutrition, Jeju National University)
  • 윤창훈 (제주대학교 자연과학대학 식품영양학과) ;
  • 좌승미 (제주대학교 자연과학대학 식품영양학과)
  • Published : 2006.03.31
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Abstract

This study was carried out to isolate the possible anti-tumor promoters from the citrus peel (Citrus natsudaidai Hayata). We fractionated the cold-pressed oil of citrus peel by column chromatography, HPLC and TLC. The analysis on column chromate-graphy yielded seven peaks $(F-I{\sim}F-VII)$, all of which showed single spot on TLC analysis ($R_f$ for $F-I{\sim}VIII$; 0.31, 0.13, 0.13, 0.78, 0.79, 0.69 and 0.84). Among the seven fractions, three fractions (F-I, -II and F-IV) were re-analyzed on HPLC, also showing single peak except for one fraction (F-IV) which was divided two peaks. The retention times $(R_f)$ of F-I and F-II was 3 min. and 2.5 min., respectively, but these of two peaks from F-IV were 2 min. and 4.5 min., respectively. Since the area of the latter peak (4.5 min.) was very smaller than that of the former one (2 min.), it is considered that the latter one did not appear on TLC analysis. The inhibitory effect on tumor promoter 12-O-tetradecanoylphorbol-13-acetate(TPA)-induced Epstein-Barr virus activation in Raji cells was tested for the seven fraction obtained. It decreased in order of F-VI (82.3+1.3%) > F-I (80.4+1.6%) > F-II (77.2+0.9%) > F-III (75.0+1.2%) > F-IV (74.1=1.0%) > F-V (71.0+1.1%) > F-VII (70.2+1.2%). These results imply that some constiuents contained in citrus peels have the inhibitory activity of TPA-induced tumor promotion.

하귤(Citrus natsudaidai Hayata)의 과피를 cold-press하여 얻어진 정유성분을 column chromatography, HPLC 및 TLC로 분리 정제하여 각 분획에 대하여 EBV활성화에 대한 억제효과를 측정하였다. Column chromatography로 정유성분의 분리를 시도하여 7개 의 peak$(F-I{\sim}VII)$를 얻을 수 있었다. 이것들을 TLC로 분석한 결과, 각각 단일 반점만을 나타냈으며 $R_f$값은 0.31, 0.13, 0.13 0.78, 0.79, 0.69, 0.84이었다. 7개의 peak중에서 F-I, II 및 F-IV 등 3개의 peak에 대하여 HPLC분석을 한 결과 F-I 및 F-II는 단일 peak이며 retention time은 F-I이 3분, F-II는 2.5분이었다. 그러나 F-IV는 2개의 peak가 나타났으며 retention time은 각각 2분과 4.5분이었다. 4.5분에 나타난 peak는 극히 적은 면적으로 보아 극소량의 물질이어서 앞서의 TLC분석에서 나타나지 많았던 것으로 생각된다. $F-I{\sim}F-VII$에 대한 EBV활성화에 대한 억제효과 측정은 Raji cells을 이용하여 간접형광 항체법으로 실시했다. 억제율은 F-VI가 $82.3{\pm}1.3%$으로 가장 높았으며 다음이 F-I$(80.4{\pm}1.6%)$ > F-II$(77.2{\pm}0.9%)$ > F-III$(75.0{\pm}1.2%)$ > F-IV$(74.1{\pm}1.0.%)$ > F-V$(71.0{\pm}1.1%)$ > F-VII$(70.2{\pm}1.2%)$의 순으로 모두 70% 이상의 억제율을 나타냈다. 이상의 결과는 하귤과피에는 발암 promotion 억제활성성분이 존재한다는 것을 시사한 것이다.

Keywords

References

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