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논문 기본 정보

자료유형
학위논문
저자정보

Hae Ji (서울대학교, 서울대학교 대학원)

지도교수
이기원
발행연도
2016
저작권
서울대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

초록· 키워드

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Obesity is one of the most important risk factors in the various diseases including type 2 diabetes, cardiovascular diseases, and multiple forms of cancers. Due to side-effects of anti-obesity drugs, natural materials have been studied to be used as alternatives for obesity treatment. There have been many evidences that isoflavones derived from soybean play a beneficial role in obesity. In the present study, the anti-obesity effect of orobol which is one of soy isoflavones has been investigated in adipogenic cocktail (MDI)-induced 3T3-L1 adipocytes and high-fat diet (HFD)-induced male C57BL/6J obese mice model. During MDI-induced adipogenesis in 3T3-L1 pre-adipocytes, orobol 20 ?M suppressed lipid accumulation and decreased protein expression levels of peroxisome proliferator-activated receptor-γ (PPARγ), CCAT/ enhancer-binding protein-α (C/EBPα) and fatty acid synthase (FAS). Orobol blocked adipogenesis from early stage to terminal differentiation by inhibiting Casein Kinase 1 epsilon (CK1ε) and its downstream signaling pathways, eukaryotic translation initiation factor 4E-binding protein 1 (4E-BP1) in 3T3-L1 preadipocytes. Also orobol treatment resulted in reduced lipid accumulation in HFD-fed mice model. In summary, I firstly identified orobol significantly suppressed adipogenesis and this inhibitory effect exerted through CK1ε/4E-BP1 in 3T3-L1 preadipocytes. These findings suggest orobol can be a novel therapeutic agent to treat obesity.

목차

Ⅰ. Introduction 1
Ⅱ. Materials and methods 5
2.1. Reagents 5
2.2. Cell culture and preadipocytes differentiation 6
2.3. Cell proliferation assay 7
2.4. Oil Red O staining 8
2.5. Western blot assay 9
2.6. Kinase assay 10
2.7. Pull-down assay 11
2.8. Animal study 12
2.9. Statistical analysis 13
Ⅲ. Results 14
3.1. Orobol inhibits MDI-induced adipogenesis in 3T3-L1 preadipocyte 14
3.2. Orobol blocks MDI-induced lipid accumulation through all stages of adipogenesis in 3T3-L1 preadipocytes 19
3.3. Orobol inhibits CK1ε kinase activity 22
3.4. Orobol suppresses 4E-BP1 phosphorylation in 3T3-L1 preadipocytes 25
3.5. Orobol ameliorates obesity in HFD-fed mice 28
Ⅳ. Discussion 32
Ⅴ. References 36
Ⅵ. 국문 초록 44

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