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유체전단응력에 의하여 3T3-L1 지방세포가 받는 영향

Effects of Fluid Shear Stress on 3T3-L1 Preadipocytes

  • 이정근 (연세대학교 보건과학대학 의공학부) ;
  • 이영훈 (연세대학교 보건과학대학 의공학부) ;
  • 진희원 (연세대학교 보건과학대학 의공학부) ;
  • 이서현 (연세대학교 보건과학대학 의공학부) ;
  • 김지현 (연세대학교 보건과학대학 의공학부)
  • Lee, Jeongkun (Department of Biomedical Engineering, Yonsei University) ;
  • Lee, Yeong Hun (Department of Biomedical Engineering, Yonsei University) ;
  • Jin, Heewon (Department of Biomedical Engineering, Yonsei University) ;
  • Lee, Seohyun (Department of Biomedical Engineering, Yonsei University) ;
  • Kim, Chi Hyun (Department of Biomedical Engineering, Yonsei University)
  • 투고 : 2018.06.18
  • 심사 : 2018.08.24
  • 발행 : 2018.08.31

초록

Adipocytes affect obesity through the regulation of lipid metabolism. Physical loading is an important regulator of fat tissue. There are ongoing in vitro studies inducing mechanotransduction on 3T3-L1 preadipocytes with mechanical stimulus in order to treat obesity by inhibiting adipogenesis and provoking cell death. In this study, our goal was to suggest a new therapy for obesity by investigating whether fluid shear stress (FSS) changes transcription factors on 3T3-L1 related with adipogenesis and cell death. FSS loading was applied to 3T3-L1 preadipocytes at 1Pa and 1Hz. After loading, bright field images were taken and an immunofluorescence assay was conducted to observe actin stress fiber formation. Western blot analysis was conducted to identify the activation of the ERK pathway as well as the adipogenic factors, which including C/EBPs and $PPAR{\gamma}$. The expression of osteopontin, a protein related to inflammation in adipose tissue, and cell death related factors, Bax, Bcl-2, and Beclin, were also measured. Results showed that FSS stimulated the formation of actin stress fibers in 3T3-L1 and also that the activation of C/EBPs decreased significantly when compared with the control group. $PPAR{\gamma}$ activation in the 2 hour FSS group was lower than the 1 hour FSS group, which implied that the results were time dependent. Additionally, there were no differences in the expression of cell death factors after FSS loading. In summary, similar to other fibroblasts, the formation of actin stress fibers induced by mechanotransduction may affect the differentiation of 3T3-L1, leading to inhibition of adipogenesis and inflammation.

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참고문헌

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