Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Comparative Analysis on Anti-aging, Anti-adipogenesis, and Anti-tumor Effects of Green Tea Polyphenol Epigallocatechin-3-gallate

녹차의 폴리페놀류인 에피갈로카테킨-3-갈레이트에 의한 항노화, 항비만 및 항암효과에 대한 비교 분석

  • Lim, Eun-Ji (Department of Biology Education, College of Education, Gyeongsang National University) ;
  • Kim, Min-Jae (Department of Biology Education, College of Education, Gyeongsang National University) ;
  • Kim, Hyeon-Ji (Department of Biology Education, College of Education, Gyeongsang National University) ;
  • Lee, Sung-Ho (Division of Life Science, Gyeongsang National University) ;
  • Jeon, Byeong-Gyun (Department of Biology Education, College of Education, Gyeongsang National University)
  • 임은지 (경상대학교 사범대학 생물교육과) ;
  • 김민재 (경상대학교 사범대학 생물교육과) ;
  • 김현지 (경상대학교 사범대학 생물교육과) ;
  • 이성호 (경상대학교 생명과학부) ;
  • 전병균 (경상대학교 사범대학 생물교육과)
  • Received : 2018.06.08
  • Accepted : 2018.08.20
  • Published : 2018.10.30
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Abstract

The study compared the anti-aging, anti-adipogenesis, and anti-tumor effects of epigallocatechin-3- gallate (EGCG) in various cancer cell lines (SNU-601, MKN74, AGS, MCF-7, U87-MG, and A-549) and normal cell lines (MRC-5 fibroblasts, dental tissue-derived mesenchymal stem cells [DSC], and 3T3-L1 pro-adipocytes). Half inhibitory concentration ($IC_{50}$) values were significantly (p<0.05) higher in normal cell lines (~50 uM), when compared to that in cancer cell lines (~10 uM). For anti-aging effects, MRC-5 and DSC were exposed to 10 uM EGCG for up to five passages that did not display any growth arrest. Population doubling time and senescence-related ${\beta}-galactosidase$ ($SA-{\beta}-gal$) activity in treated cells were similar to untreated cells. For anti-adipogenic effects, mouse 3T3-L1 pre-adipocytes were induced to adipocytes in an adipogenic differentiation medium containing 10 uM EGCG, but adipogenesis in 3T3-L1 cells was not inhibited by EGCG treatment. For anti-tumor effects, the cancer cell lines were treated with 10 uM EGCG. PDT was significantly (p<0.05) increased in EGCG-treated SNU-601, AGS, MCF-7, and U87-MG cancer cell lines, except in MKN74 and A-549. The level of telomerase activity and cell migration capacity were significantly (p<0.05) reduced, while $SA-{\beta}-gal$ activity was highly up-regulated in EGCG treated-cancer cell lines, when compared to that in untreated cancer cell lines. Our results have demonstrated that EGCG treatment induces anti-tumor effects more efficiently as noted by decreased cell proliferation, cell migration, telomerase activity, and increased $SA-{\beta}-gal$ activity than inducing anti-aging and anti-adipogenesis. Therefore, EGCG at a specific concentration can be considered for a potential anti-tumor drug.

본 연구에서는 다양한 사람의 암세포주(SNU-601, MKN74, AGS, MCF-7, U87-MG 및 A-549)와 정상세포주 [MRC-5 섬유아세포, 사랑니 유래 중간엽 줄기세포(DSC), 3T3-L1 생쥐의 지방전구세포]에 녹차에 포함되어 있는 epigallocatechin-3-gallate (EGCG)를 처리하여 세포 증식, 세포 노화, 지방세포로의 분화, 말단소립복원효소 활성과 암세포의 전이 능력 등을 검증하여 항노화, 항비만 및 항암 효과를 서로 비교 조사하였다. MTT 분석에서 다양한 암세포주는 정상세포주보다 유의적으로 낮은 반억제농도값을 나타내었다. 10 uM의 EGCG가 포함된 배양액에서 정상체세포인 MRC-5와 DSC를 5 계대배양한 결과 세포증식 및 세포 노화에 큰 변화를 관찰하지 못하였고, 3T3-L1 생쥐의 지방전구세포를 지방분화 배양액에 EGCG를 첨가하여 지방세포로의 분화 억제를 유도하였지만 지방세포로의 분화를 역시 억제하지 못하였다. 그러나 여러 다양한 암세포주에 10 uM의 EGCG가 포함된 배양액에 배양한 결과 암세포의 세포증식 억제, 세포노화 유도, 말단소립복원효소 활성과 암세포의 전이 능력이 현저히 감소됨을 관찰하여 EGCG는 항노화나 항비만 효과보다는 항암효과에 더 효율적인 것으로 관찰되었고, 적당한 농도에서 잠재적인 항암물질로의 한 종류로 판단된다.

Keywords

References

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