Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Silibinin Inhibits Adipogenesis and Induces Apoptosis in 3T3-L1 Adipocytes

Silibnin의 지방세포분화 억제 및 세포사멸 유도 효과

  • Lee, Seul Gi (Department of Food Science and Biotechnology, Kyungpook National University) ;
  • Kwon, Taeg Kyu (Department of Immunology, School of Medicine, Keimyung University) ;
  • Nam, Ju-Ock (Department of Food Science and Biotechnology, Kyungpook National University)
  • 이슬기 (경북대학교 농업생명과학대학 식품공학부) ;
  • 권택규 (계명대학교 의과대학 면역학교실) ;
  • 남주옥 (경북대학교 농업생명과학대학 식품공학부)
  • Received : 2016.10.24
  • Accepted : 2017.03.15
  • Published : 2017.03.28
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Abstract

$C/EBP{\beta}$ and $C/EBP{\delta}$ are required for the initiation of adipogenesis and induce the expression of key adipogenic regulators, such as $PPAR{\gamma}$ and $C/EBP{\alpha}$. In the present study, we have examined the effects of silibinin and its possible molecular mechanisms in regulating adipocyte differentiation and expression of $C/EBP{\beta}$ and $C/EBP{\delta}$ in the early stage of adipogenesis. Silibinin statistically significantly inhibits intracellular lipid accumulation and the mRNA expression of various genes involved at different stages during adipogenesis. Silibinin also suppresses expression of lipoprotein lipase (LPL), fatty acid binding protein 4 (AP2), and adiponectin in 3T3-L1 adipocytes. Thus, the anti-adipogenic effect of silibinin seems to originate from the ability to inhibit the expression of $C/EBP{\beta}$ and $C/EBP{\delta}$. Furthermore, silibinin decreases cell viability for differentiation period and induces apoptotic cell death through capspase-3 activation.

CCAAT/enhancer-binding protein beta, delta ($C/EBP{\beta}$, ${\delta}$)는 지방세포분화 과정의 초기에 필수적으로 요구되며 지방생성 주요 조절인자인 proliferator-activated receptor gamma ($PPAR{\gamma}$) and CCAAT/enhancer-binding protein-alpha ($C/EBP{\alpha}$)의 발현을 유도한다. 본 연구에서는 silibinin의 지방세포 분화 억제 효과 및 이러한 효과가 지방세포 분화초기에 $C/EBP{\beta}$ 및 $C/EBP{\delta}$의 발현 조절을 통해 일어난 다는 것을 확인하였다. Silibinin은 지방세포 내 지질축적을 억제하고 세포분화 과정 동안 관여하는 다양한 유전자의 mRNA 발현을 억제하였다. 또한 lipoprotein lipase (LPL), fatty acid binding protein 4 (AP2) 및 adiponectin과 같은 지방세포 분화 관련 유전자의 발현을 억제시켰다. 따라서, Silibinin의 지방세포 분화 억제효과는 $C/EBP{\beta}$ 및 $C/EBP{\delta}$의 발현억제에 의한 것으로 보인다. 더불어, Silibinin은 capspase-3 활성을 통해 분화하는 세포에 특이적으로 세포사멸을 유도하는 것을 확인하였다.

Keywords

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