생명과학회지 (Journal of Life Science)

  • 제28권9호
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  • Pages.1042-1047
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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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홍조류인 Gracilaria vermiculophylla 추출물에 의한 노화 골수유래 중간엽줄기세포의 항노화 및 분화능력 개선 효과

Extracts from Gracilaria vermiculophylla Prevent Cellular Senescence and Improve Differentiation Potential in Replicatively Senescent Human Bone Marrow Mesenchymal Stem Cells

  • 정신구 (조선대학교 자연과학대학 생명과학과) ;
  • 조태오 (조선대학교 자연과학대학 생명과학과) ;
  • 조광원 (조선대학교 자연과학대학 생명과학과)
  • Jeong, Sin-Gu (Department of Biology, College of Natural Science, Chosun University) ;
  • Cho, Tae Oh (Department of Biology, College of Natural Science, Chosun University) ;
  • Cho, Goang-Won (Department of Biology, College of Natural Science, Chosun University)
  • 투고 : 2018.05.18
  • 심사 : 2018.07.03
  • 발행 : 2018.09.30
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초록

홍조류인 꼬물꼬시래기(Gracilaria vermiculophylla)는 전 세계의 해변 지역에 널리 퍼져 있으며 아시아 국가에서 식량 자원으로 이용되어왔다. 이전 연구에 따르면, Gracilaria 속 홍조류 추출물에서 항산화 및 항염증 효과가 보고 되었다. 본 연구에서는 노화된 인간의 골수 유래 중간엽 줄기세포(hBM-MSCs)를 이용하여 Gracilaria vermiculophylla 추출물(GV-Ex)의 항노화 효과를 조사하였다. MTT 분석와 immunoblot 분석(apoptotic protein p53과 cleaved caspase-3)을 이용하여, GV-Ex 전처리는 산화적 스트레스에 의해 손상된 hBM-MSCs의 세포생존력을 향상시킴을 확인하였다. 또, 세포내 생성된 ROS는 장기간 배양 된 MSCs (Passages 17; P-17)와 P-7 MSC에서 측정하여 서로 비교하였는데, P-17 MSC에서 증가되었고, GV-Ex 처리하면(GV-Ex treated P-17 MSCs) 유의하게 감소되었다. 또한, 항산화 효소인 SOD1와 SOD2, CAT의 발현 역시 GV-Ex 처리함에 따라 복원됨을 관찰하였다. 노화 표지단백질인 p53와 p21, p16 등의 발현 또한 GV-Ex를 처리한 P-17 MSC에서 감소되었다. 줄기세포의 골세포(osteocytes) 혹은 지방세포(adipocytes)로 분화하는 능력 역시 GV-Ex를 처리한 P-17 MSCs에서 개선되었다. 이상과 같은 결과를 통해, GV 추출물은 노화된 줄기세포의 기능을 개선함을 시사한다.

The red algae Gracilaria vermiculophylla is widespread on seashores worldwide and has been used as food in Asian countries. Previous studies have reported that extracts of Gracilaria red algae have beneficial anti-oxidant and anti-inflammatory effects. The present study examined the anti-senescence effects of Gracilaria vermiculophylla extracts (GV-Ex) in replicatively senescent human bone marrow mesenchymal stem cells (hBM-MSCs). GV-Ex pretreatment improved the cellular viability of hBM-MSCs that had been injured by oxidative stress. These effects of GV-Ex were confirmed by MTT assay and immunoblot analysis using the apoptotic proteins p53 and cleaved caspase-3. The reactive oxygen species (ROS) levels were examined in long-term cultured Passages 17 (P-17) mesenchymal stem cells (MSC) and compared to P-7 MSC. The ROS accumulation was greater in the P-17 than in the P-7. However, these increased ROS levels in the P-17 were decreased significantly after treatment with GV-Ex, and restoration of the levels of the anti-oxidant enzymes SOD1, SOD2, and CAT was also observed under these conditions. In addition, P-17 hBM-MSC treated with GV-Ex had decreased levels of the senescence proteins p53, p21, and p16. The results show that the ability of P-17 hBM-MSC to differentiate into osteocytes and adipocytes was improved by GV-Ex treatment, suggesting that GV-Ex ameliorates the functional decline of senescent stem cells.

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