• The Korean Journal of Physiology and Pharmacology
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• 제15권1호
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• pp.43-51
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• 2011

Natural products in Chonnam, Korea were screened via anti-angiogenesis experiments, and 1 candidate product was identified, Corni fructus, which exerted dose-dependent inhibitory effects against angiogenesis, adipogenesis, and cell adhesion. C. fructus extract (CFE) exhibits an angiogenesis inhibitory effect superior to that of the EGCG from green tea leaves. The expression level of angiogenesis and adipogenesis-related signal molecules in the western blotting was reduced by increasing the amount of added CFE. Moreover, a diet supplemented with CFE was deemed more effective in inducing weight loss in LB mice than a representative synthetic diet drug, orlistat, which incidently caused the side effect of denuding the mice of their hair. These results indicate that C. fructus may prove to be a useful anti-adipogenic compound, and these in vitro results may be reflected later under in vivo conditions.

• Journal of Microbiology and Biotechnology
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• 제28권10호
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• pp.1645-1653
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• 2018

The genus Acer contains several species with various bioactivities including antioxidant, antitumor and anti-inflammatory properties. However, Acer okamotoanum Nakai, one species within this genus has not been fully studied yet. Therefore, in this study, we investigated the anti-adipogenic activities of leaf extract from A. okamotoanum Nakai (LEAO) on 3T3-L1 preadipocytes. Adipogenesis is one of the cell differentiation processes, which converts preadipocytes into mature adipocytes. Nowadays, inhibition of adipogenesis is considered as an effective strategy in the field of anti-obesity research. In this study, we observed that LEAO decreased the accumulation of lipid droplets during adipogenesis and down-regulated the expression of key adipogenic transcription factors such as peroxisome proliferator-activated receptor ${\gamma}$ (PPAR ${\gamma}$) and CCAAT/enhancer binding protein ${\alpha}$ (C/EBP ${\alpha}$). In addition, LEAO inactivated PI3K/Akt signaling and its downstream factors that promote adipogenesis by inducing the expression of PPAR ${\gamma}$. LEAO also activated ${\beta}$-catenin signaling, which prevents the adipogenic program by suppressing the expression of PPAR ${\gamma}$. Therefore, we found that treatment with LEAO is effective for attenuating adipogenesis in 3T3-L1 cells. Consequently, these findings suggest that LEAO has the potential to be used as a therapeutic agent for preventing obesity.

• 한국식품과학회지
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• 제53권2호
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• pp.149-153
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• 2021

본 연구는 감귤 가공공정 중에 발생하는 가공부산물인 감귤피의 산업적 이용성 및 유용성을 증대시키고자 효소적 추출법을 적용하여 추출물을 제조하고 항비만 활성을 측정하였다. 감귤피 효소적 추출물(MPCE)의 폴리페놀 함량은 이전의 연구에서 보고한 유기용매 추출물보다 높은 함량을 나타내었다. MPCE의 항비만 활성을 알아보기 위해 지방세포 분화억제에 미치는 영향을 확인한 결과 MPCE는 농도 의존적으로 지방세포의 분화 및 지방축적을 감소시켰으며 이는 세포독성에 의한 것이 아님을 세포생존율 측정을 통해 확인하였다. 또한 MPCE는 adipogenesis 관련 전사인자인 C/EBPα, SREBP-1, PPARγ, FABP4의 단백질 발현을 감소시켰다. 이러한 결과들을 통해 MPCE는 adipogenesis 관련 전사인자의 단백질 발현 억제하여 지방세포의 분화 및 지방축적을 억제하였으며, 이를 통해 항비만 효과를 나타낸다는 것을 확인하였다. 따라서 MPCE는 비만 예방 효능을 가진 기능성 식품 소재로서의 활용 가치가 있는 것으로 판단되며, 보다 명확한 항비만 효능을 확인하기 위해 추후 동물 실험 등에 대한 연구가 필요할 것으로 생각된다.

• KSBB Journal
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• 제27권6호
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• pp.381-386
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• 2012

Obesity increases the risk of many adult diseases, such as atherosclerosis, diabetes, hypertension, ischemic heart disease and breast cancer. Inhibition of adipogenesis is an effective way in the anti-obesity management. Because of main components of Saururus chinensis is flavonoid, it has been showed some improvement by its antioxidant effects on the atherosclerosis, heart disease and diabetic hyperlipidemia. But mechanism of anti-obesity effect of S. chinensis is not clear. We investigated the effects of ethanol extracts of S. chinensis on adipogenesis in the 3T3-L1 pre-adipocyte. The 3T3-L1 cell line is commonly used to study adipogenesis in vitro. In this study, ethanol extracts of S. chinensis significantly decrease the lipid accumulation in the 3T3-L1 cells proved by measuring triglyceride contents and Oil red O staining. The proposed mechanism of inhibition of adipogenesis in the 3T3-L1 cells with ethanol extracts of S. chinensis is down-regulation of transcriptional factors and adipocyte-specific genes such CCAAT/enhancer binding protein ${\alpha}$ ($C/EBP{\alpha}$) and Peroxisome proliferator activated receptor ${\gamma}$ ($PPAR{\gamma}$) in concentration dependent pattern. These results suggest that ethanol extracts of S. chinensis inhibits adipognesis in the 3T3-L1 cells and can be used as a safe and efficient natural substance to manage anti-obesity.

• 대한본초학회지
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• 제31권6호
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• pp.29-35
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• 2016

Objectives : Blood stasis (BS) is related to be caused by blood circulation and stagnation which are cancer, atherosclerosis and hyperlipidemia in traditional medicine. We extracted 3 kinds of BS formula; Seogakjihwang-tang (SGT), Tonggyuhawlhyul-tang (THT), Hyulbuchukeo-tang (HCT). This study was conducted to investigate whether the 3 kinds of herbal formula extracts have inhibitory efficacy association with anti-adipogenesis. Methods : To investigate the anti-adipogenesis, we used the mouse fibroblast cell line, 3T3-L1 which differentiated into adipocytes in response to insulin, IBMX and dexamethasone (MDI). Cytotoxicity of herbal formula extracts were examined by CCK-8 kit. Intracellular lipid droplets were detected by Oil-Red-O staining. Triglyceride (TG) and leptin were measure using elisa kit. Results : The yield of water extracts was 14.62% (SGT), 21.27% (THT), 20.02% (HCT). Lipid accumulation was reduced significantly by 3 kinds of herbal formula compared to control. Especially, THT and HCT decreased lipid droplet, respectively at all concentration. The TG and leptin were also inhibited by 3 kinds of herbal formula. The IC50 of TG were $280.51{\mu}g/m{\ell}$ (SGT), $52.62{\mu}g/m{\ell}$ (THT), $313.99{\mu}g/m{\ell}$ (HCT). The IC50 of leptin were $348.76{\mu}g/m{\ell}$ (SGT), $164.02{\mu}g/m{\ell}$ (THT), $257.00{\mu}g/m{\ell}$ (HCT). THT was better than other herbal formula on anti-adipogenesis. Conclusion : kinds of herbal formula inhibited adipogenesis in MDI-induced 3T3-L1 adipocytes, as indicated by the significant reduction in TG and leptin concentration without cytotoxicity. Therefore, 3 kinds of herbal formula for BS might act as a therapeutic agent for preventing lipid diseases, such as obesity and atherosclerosis.

• Journal of Microbiology and Biotechnology
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• 제26권11호
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• pp.1836-1844
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• 2016

Adipogenesis is one of the cellular processes and a highly controlled program. Nowadays, inhibition of adipogenesis has received attention as an effective way to regulate obesity. In the current study, we investigated the inhibition effect of a chloroform extract of Pleurotus eryngii var. ferulae 'Beesan No. 2' (CEBT) on adipogenesis in 3T3-L1 murine preadipocytes. Pleurotus eryngii var. ferulae is one of many varieties of King oyster mushroom and has been reported to have various biological activities, including antitumor and anti-inflammation effects. Biological activities of 'Beesan No. 2', a new cultivar of Pleurotus eryngii var. ferulae, have not yet been reported. In this study, we found that CEBT suppressed adipogenesis in 3T3-L1 cells through inhibition of key adipogenic transcription factors, such as peroxisome proliferatoractivated receptor ${\gamma}$ and CCAAT/enhancer binding protein ${\alpha}$. Additionally, CEBT reduced the expression of the IRS/PI3K/Akt signaling pathway and its downstream factors, including mammalian target of rapamycin and p70S6 kinase, which stimulate adipogenesis. Furthermore, ${\beta}-catenin$, a suppressor of adipogenesis, was increased in CEBT-treated cells. These results indicate that Pleurotus eryngii var. ferulae 'Beesan No. 2' effectively inhibited adipogenesis, so this mushroom has potential as an anti-obesity food and drug.

• 대한본초학회지
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• 제31권5호
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• pp.47-53
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• 2016

Objectives : Mori Follium (Morus alba L. leaf) has been cultivated in many Asian countries. Especially, mulberry leaf has been used as an anti-diabetic remedy in oriental medicine. However, anti-obesity effect of mulberry has not been unknown. In this study, our objectives of study is to investigate the anti-adipogenic effect of mulberry water extract (MLE) and to reveal potential molecular anti-obesity mechanism in 3T3-L1 adipocytes differentiation model.Methods : The cytotoxicity of MLE in 3T3-L1 was examined by MTT assay. Anti-adipogenic effect of MLE was evaluated by Oil Red O (ORO) staining. To elucidate the molecular mechanism, inhibitor assay was employed. The mRNA expression levels of adipogenic transcriptional factors such as PPARγ and fatty acid synthase (FAS) were analyzed by reverse transcription-polymer chain reaction (RT-PCR) analysis.Results : The MLE treatment for 24 h did not affect to the 3T3-L1 cells at concentrations of 1, 10, 100, 200, 400, 800 and 1,000 ㎍/㎖. Thus, non-toxic concentration rages of MLE were used during adipogenesis period (day -2 to 7). Intracellular lipid accumulation in MLE-treated 3T3-L1 adipocytes (day 6) were quantitatively evaluated by ORO staining. The MLE treatment significantly and dose-dependently suppressed 3T3-L1 adipogenesis by 60.42%, 38.24%, and 5.97% at 10, 100, and 200 ㎍/㎖, respectively. In addition, our inhibitor assay and RT-PCR analysis revealed that the MLE-inhibited 3T3-L1 adipogenesis through inhibition of PPARγ mediated by Wnt/β-catenin signaling pathway.Conclusions : In conclusion, these findings indicate that the MLE could be used in prevent and/or treatment of obesity-related diseases.

• 생명과학회지
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• 제19권12호
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• pp.1802-1807
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• 2009

Platycodi radix의 주요 성분으로 항염증, 항고지혈 및 항종양 등 다양한 약리적 기능을 가지는 platycodin D는 최근 비만 및 지방세포형성(adipogenesis)을 억제하는 효과를 가진다고 보고되고 있다. 본 연구에서는 adipogenesis의 상위단계에 위치한 다양한 pro-adipogenic regulators와 anti-adipogenic regulators의 발현이 platycodin D에 의해 어떻게 변화되는지 분석하였다. Real-time PCR을 이용한 mRNA 발현의 정량적 분석에서 adipogenesis의 marker라 불리는 ADIPOQ와 GLUT4의 mRNA 발현은 platycodin D의 처리에 의해 유의적으로 감소되었다. 또한 terminal marker의 발현을 조절하는 PPAR$\gamma$와 C/EPB$\alpha$의 mRNA 발현 역시 platycodin D에 의해 유의하게 억제되었다. Platycodin D의 지방세포 억제 효과에 대한 상세한 분자적 메커니즘을 규명하기 위해, PPAR$\gamma$와 C/EPB$\alpha$의 상위 조절자들의 mRNA 발현 변화를 분석하였다. Pro-adipogenic regulators에 대한 platycodin D의 효과를 분석한 결과, C/EBP$\beta$와 C/EPB$\delta$의 mRNA 발현은 platycodin D에 의해 변화가 없었던 반면, KROX20과 KLF15의 mRNA 발현은 각각 초기 분화(2일)와 후기 분화(4일)에서 platycodin D에 의해 유의한 감소를 보였다. 또한, 대표적인 anti-adipogenic regulators인 CHOP의 mRNA 발현은 초기분화에서 platycodin D에 의해 유의하게 증가한 반면, 또 다른 anti-adipogenic regulators인 C/EBP$\gamma$의 mRNA 발현은 platycodin D에 의해 영향을 받지 않았다. 따라서 adipogenesis 과정에서 platycodin D는 pro-adipogenic regulators인 KROX20, KLF15와 anti-adipogenic regulator인 CHOP의 mRNA 발현에 영향을 주어 PPAR$\gamma$와 C/EPB$\alpha$를 조절하는 것으로 보여진다. 결론적으로, platycodin D에 의한 adipogenesis 억제 효과는 KROX20, KLF15 등의pro-adipogenic regulator와 CHOP 등의 anti-adipogenic regulator의 상호작용을 통해 나타나는 결과라 사료된다.

• 생명과학회지
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• 제25권3호
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• pp.285-292
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• 2015

본 연구에서는 3T3-L1 지방전구세포가 지방세포로 분화되는 과정에서 진피 에탄올 추출물(ethanol extracts of citrus peel, EECP)이 유발하는 항비만 효능에 대해서 조사하였다. 3T3-L1 세포의 생존율 및 증식에 영향을 미치지 않는 농도의 EECP를 처리하였을 경우 지방세포에서 특징적으로 나타나는 lipid droplet의 형성과 triglyceride의 생성도 억제되는 것으로 나타났다. EECP가 유발하는 지방세포로의 분화억제에는 PPARγ, C/EBPα, C/EBPβ 및 SREBP-1c 등과 같은 adipogenic transcription factors의 발현억제가 관여하는 것으로 나타났으며, 그 결과로 aP2 및 Leptin과 같은 adipocyte expressed genes의 발현도 억제되는 것으로 조사되었다. 또한 EECP는 AMPK 및 ACC의 인산화를 유발하였으며, AMPK 억제제인 Compound C를 이용하여 AMPK의 활성을 억제하였을 경우 EECP에 의한 AMPK의 인산화와 adipogenic transcription factors의 억제현상이 회복되었다. 이상의 결과에서 EECP는 AMPK signaling pathway를 통하여 항비만 효능을 가진다는 것을 알 수 있었으며, 향후 비만 예방 및 억제와 관련된 기능성 소재로서의 진피의 활용 가능성을 제시한 것으로서 그 가치가 매우 높을 것으로 생각된다.

• 대한한의학회지
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• 제31권2호
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• pp.158-166
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• 2010

Objective: It has been reported that Polygonati rhizoma (Pr) has anti-hyperglycemia, anti-triglycemia, anti-diabetic, and anti-tumor activity. Total extract of Pr was tested to identify anti-adipogenic activity in 3T3-L1 differentiation and molecular mechanism of Pr in 3T3-L1 differentiation. Methods: Differentiation of 3T3-L1 pre-adipocyte was induced in the presence of Pr extract and kaempferol. The level of lipid accumulation was measured by Oil Red O staining. The expression of genes associated with adipocyte differentiation was measured by RT-PCR. Results: Extract of Pr and its component kaempferol reduced lipid accumulation in 3T3-L1 during adipogenesis and also reduced mRNA levels of genes associated with adipogenesis, such as adipsin, aP2, LPL, SERBP-1c and $PPAR{\gamma}$. Conclusions: In this study, we showed that the molecular mechanism of Pr and kaempferol activity is related to regulation of $PPAR{\gamma}$ expression and activation.