• KSBB Journal
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• 제31권3호
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• pp.145-150
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• 2016

Boehmeria nivea (L.) Gaud., a flowering plant, has been widely cultivated in Asian countries including Korea. It has been reported that B. nivea exhibits health beneficial effects for the prevention of inflammation, oxidative stress, and virus-related diseases. In this study, we evaluated the inhibitory effect of B. nivea on adipocyte differentiation and angiogenesis. DPPH radical scavenging activities of 70% ethanol extract of B. nivea (EBN) and water extract of B. nivea (WBN) were $90.8{\pm}1.1%$ and $20{\pm}6.9%$, respectively. EBN was also effective in the reduction of adipocyte differentiation in 3T3-L1 cells. We next examined the transcriptional activity of peroxisome proliferator-activated receptor gamma ($PPAR-{\gamma}$), a pivotal target for anti-obesity. We found that treatment with rosiglitazone induced the transactivation of $PPAR-{\gamma}$. Under the same condition, $800{\mu}g/mL$ EBN reduced the transactivation of $PPAR-{\gamma}$ in rosiglitazone-induced cells. These results demonstrate that EBN-inhibited adipocyte differentiation was accompanied by $PPAR-{\gamma}$ inhibition. The study also tested whether EBN exhibits an anti-angiogenic effect by inhibiting tube formation in HUVECs. We found that EBN effectively inhibits tube formation, suggesting that EBN exhibited an anti-angiogenic effect. Taken together, B. nivea can be used as a functional food for the prevention of obesity and angiogenesis-related diseases including cancer.

• Natural Product Sciences
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• 제17권4호
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• pp.273-278
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• 2011

In this study, the effects of a methanol (MeOH) extract of Carduus crispus L. (Asteraceae) on adipogenesis was investigated in 3T3-L1 cells. To differentiate preadipocytes to adipocytes, confluent 3T3-L1 preadipocytes were treated with a hormone mixture, which included isobutylmethylxanthine, dexamethasone, and insulin (MDI). The methanol extract of C. crispus significantly decreased fat accumulation by inhibiting adipogenic signal transcriptional factors in MDI-induced 3T3-L1 cells in a dose-dependent manner. In MTT assays and on PI-staining, methanol extract of C. crispus inhibited the proliferation of 3T3-L1 cells during mitotic clonal expansion (MCE). The anti-adipogenic effect of the Carduus extract seemed to be associated with the upregulation of extracellular signal-regulated kinase (ERK) and p38 mitogen-activated protein kinase (MAPK) pathways within the first 2 days after MDI treatment. These results suggest that methanol extract of C. crispus might be beneficial for the treatment of obesity.

• 한방재활의학과학회지
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• 제21권2호
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• pp.31-48
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• 2011

Objectives : In order to investigate the anti-obesity effects of Wolbi-tang(here in after referred to WBT) on the obese gene and obese inhibitory, C57BL/6 mice were induced by high-fat diet. Methods : C57BL/6 mice were divided into 5 groups(normal, only high-fat diet, high-fat diet with Reductil, high-fat diet with WBT 400, 200 mg/kg extract) and fed for 5 weeks. And observed body weight change, total cholesterol, low density lipoprotein cholesterol(LDL-cholesterol), high density lipoprotein cholesterol (HDL-cholesterol), triglyceride, glucose, leptin change, alanine transaminase(ALT), aspartate transaminase(AST), serum creatinine, the expression of ${\beta}3$-adrenergic receptor(${\beta}3AR$), leptin, uncoupling protein(UCP2) gene in 3T3-L1 adipocyte, 3T3-L1 adipocyte proliferation, histological analysis of adipose tissue and liver tissue. Results : 1. Refer to cell cytotoxicity, viability of human fibroblast cells(hFCs) showed not significant changes. 2. The amount of ALT, AST was decreased significantly in WBT 400 mg/kg, 200 mg/kg groups. The amount of creatinine showed not significant changes. 3. Body weight was decreased significantly in WBT 400 mg/kg, 200 mg/kg groups. 4. The amount of total cholesterol and triglyceride was decreased significantly in WBT 400 mg/kg, 200 mg/kg groups. LDL-cholesterol was decreased and HDL-cholesterol was increased significantly in WBT 400 mg/kg groups. 5. The amount of glucose was decreased significantly in WBT 400 mg/kg groups. 6. The amount of serum leptin was decreased significantly in WBT 400 mg/kg, 200 mg/kg groups. 7. The revelation of ${\beta}3AR$ in 3T3-L1 adipocyte was increased significantly in WBT $100{\mu}g/ml$, $50{\mu}g/ml$ groups. The revelation of leptin was decreased significantly in WBT $100{\mu}g/ml$, $50{\mu}g/ml$ groups. The revelation of UCP2 was decreased significantly in WBT $100{\mu}g/ml$ group. 8. 3T3-L1 adipocyte proliferation was decreased significantly in WBT $100{\mu}g/ml$, $50{\mu}g/ml$ groups. The size of adipocyte was decreased relative to the control group in WBT 400 mg/kg group. 9. The adipose vacuoles in liver tissue was decreased relative to the control group. Conclusions : These results suggested that WBT has inhibitory effects of obesity. WBT might be applicated on treatment of obesity and metabolic syndrome. Further studies analysing its effects were needed.

• Parasites, Hosts and Diseases
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• 제59권3호
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• pp.235-249
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• 2021

Leptin is a type of adipokine mainly produced by adipocytes and reported to be overproduced in prostate cancer. However, it is not known whether it stimulates the proliferation of prostate cells. In this study, we investigated whether benign prostatic hyperplasia epithelial cells (BPH-1 cells) infected with Trichomonas vaginalis induced the proliferation of prostate cells via a leptin signaling pathway. To investigate the effect of crosstalk between adipocyte leptin and inflamed epithelial cell in proliferation of prostate cells, adipocytes 3T3-L1 cells were incubated in conditioned medium of BPH-1 cells infected with T. vaginalis (T. vaginalis-conditioned medium, TCM), and then the adipocyte-conditioned medium (ATCM) was identified to cause proliferation of prostate cells. BPH-1 cells incubated with live T. vaginalis released pro-inflammatory cytokines, and conditioned medium of these cells caused migration of adipocytes. When prostate stromal cells and BPH-1 cells were incubated with adipocyte conditioned medium containing leptin, their growth rates increased as did expression of the leptin receptor (known as OBR) and signaling molecules such as JAK2/STAT3, Notch and survivin. Moreover, blocking the OBR reduced this proliferation and the expression of leptin signaling molecules in response to ATCM. In conclusion, our findings show that inflamed BPH-1 cells infected with T. vaginalis induce the proliferation of prostate cells through leptin-OBR signaling. Therefore, it is likely that T. vaginalis contributes to prostate enlargement in BPH via adipocyte leptin released as a result of inflammation of the prostate.

• 사상체질의학회지
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• 제8권2호
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• pp.219-238
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• 1996

Effects of Taeyeumjoweetang on the obestity of mouse induced by gold thioglucose. It is researched to elucidate the effects of Taeyeumjoweetang on the obesity of mouse induced by gold thioglucose and the differentiation and growth of preadipocyte, 3T3-L1 cell. The result were as follows. 1. Taeyeumjoweetang extract improved the blood level of transaminase changed by the obesity of mouse induced by gold thioglucose. 2. Taeyeumjoweetang extract inhibited the increase of liver fat and body fat induced by the obesity of mouse induced by gold thioglucose. 3. Taeyeumjoweetang extract inhibited the increase of body weight induced by the obesity of mouse induced by gold thioglucose. 4. Taeyeumjoweetang extract inhibited the growth of undifferentiate preadipocyte 3T3-L1. 5. Taeyeumjoweetang extract showed the effects of inhibition on the differentiation of preadipocyte 3T3-L1. The above results suggested that the Taeyeumjoweetang extract may be used on the obesity induced by the overgrowth and differentiation of adipocyte, and the accumulation of fat in liver and body.

• 한국식품과학회지
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• 제45권1호
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• pp.90-96
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• 2013

소리쟁이 추출물 및 분획물의 3T3-L1 전지방세포의 분화에 미치는 영향을 확인한 결과, 소리쟁이의 hexane, ethyl acetate 분획물에 의해 지방세포의 lipid droplet의 형성이 유의적으로 억제되었으며, 소리쟁이 에탄올 추출물과 모든 분획물 10 ${\mu}g/mL$의 농도에서 중성지질(triglyceride)의 함량이 유의적으로 감소되었다. 또한 지방세포의 분화에 관여하는 전사인자인 $PPAR{\gamma}$, $C/EBP{\alpha}$의 단백질 발현은 10 ${\mu}g/mL$의 ethyl acetate, butanol 분획물에 의해 현저하게 감소되었다. 따라서 소리쟁이 추출물과 분획물 중 가장 활성이 우수한 ethyl acetate 분획물을 이용하여 지방분화에 관여하는 전사 인자인 $PPAR{\gamma}$, $C/EBP{\alpha}$, 그리고 SREBP1c 및 지질의 합성, 수송, 저장에 관여하는 ACS, FAS, FATP1, FABP4, Perilipin의 발현에 미치는 영향을 관찰한 결과, ethyl acetate 분획물은 유의적으로 모든 유전자의 발현을 억제시켰다. 따라서 소리쟁이의 ethyl acetate 분획물은 지방세포의 분화에 관여하는 전사인자 및 유전자들의 발현을 감소시킴으로써 항비만 효과가 있는 천연물 소재로 이용 가능할 것으로 생각된다.

• Asian-Australasian Journal of Animal Sciences
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• 제22권11호
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• pp.1566-1573
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• 2009

Trans-10, cis-12 conjugated linoleic acid (CLA) has been reported to inhibit the adipocyte differentiation of preadipocytes in non-ruminant animals (mice, rat, and human). However, the effects of trans-10, cis-12 CLA have not been clear in ruminants. The objective of this study was to investigate the effects of trans-10, cis-12 CLA on adipocyte differentiation of ovine preadipocytes. Differentiation of these preadipocytes was facilitated by treatment with trans-10, cis-12 CLA. Trans-10, cis-12 CLA increased the number and size of oil red O-stainable lipid drops as well as the levels of GPDH activity. PPAR-$\gamma{2}$ and adipophilin mRNA, adipogenic marker genes, were increased by treatment with trans-10, cis-12 CLA. This result was different from that observed with 3T3-L1 preadipocytes, a clonal cell line derived from rodents. Furthermore, trans-10, cis-12 CLA alone induced the adipocyte differentiation of ovine preadipocytes in differentiation-induction medium without troglitazone. These results suggest that CLA is an inducer and regulator in adipocyte differentiation of ovine preadipocytes, with species differences between ovine and rodent preadipocytes.

• Ocean and Polar Research
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• 제37권4호
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• pp.279-285
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• 2015

In this study, the potential capacity of the crude extract and its solvent fractions from S. siliquanstrum against adipocyte differentiation were evaluated in 3T3-L1 adipocytes. The anti-adipogenic effect of S. siliquanstrum was evidenced by the fact that its crude extract decreases the lipid accumulation of differentiating cells and the expression levels of crucial adipogenesis markers, peroxisome proliferator-activated receptor $(PPAR){\gamma}$ and CCAAT/enhancer-binding protein $(C/EBP){\alpha}$. All solvent fractions except the water fraction showed an observable decrease in lipid accumulation and $PPAR{\gamma}$ and $C/EBP{\alpha}$ expressions. In conclusion, these results suggest that S. siliquanstrum possesses obesity inhibiting components, which may possibly be used as a valuable anti-obesity agent for reducing the risk of obesity.

• Journal of Microbiology and Biotechnology
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• 제18권12호
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• pp.1895-1902
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• 2008

Adipose tissue is an important endocrine organ involved in the control of whole body energy homeostasis and insulin sensitivity. Considering the increased incidence of obesity and obesity-related disorders, including diabetes, it is important to understand thoroughly the process of adipocyte differentiation and its control. Therefore, we performed a differential proteome mapping strategy using two-dimensional gel electrophoresis combined with peptide mass fingerprinting to identify intracellular proteins that are differentially expressed during adipose conversion of 3T3-L1 pre-adipocytes in response to an adipogenic cocktail. In the current study, we identified 46 differentially expressed proteins, 6 of which have not been addressed previously in 3T3-L1 cell differentiation. Notably, we found that phosphoribosyl pyrophosphate synthetase (PRPS), a regulator of cell proliferation, was preferentially expressed in pre-adipocytes than in fully differentiated adipocytes. In conclusion, our results provide valuable information for further understanding of the adipogenic process.

• Natural Product Sciences
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• 제18권3호
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• pp.153-157
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• 2012

Obesity, which is characterized by excessive fat accumulation in adipose tissues, occurs by fat absorption by lipase and sequential fat accumulation in adipocyte through adipocyte differentiation. Thus, inhibition of pancreatic lipase activity and adipocyte differentiation would be crucial for the prevention and progression of obesity. In the present study, we attempted to evaluate anti-adipogenic activity of several algae extracts employing preadipocytes cell line, 3T3-L1 as an in vitro assay system. The effects on pancreatic lipase activity in vitro were also evaluated. Total methanolic extracts of Cladophora wrightiana and Costaria costata showed significant inhibitory activity on adipocyte differentiation as assessed by measuring fat accumulation using Oil Red O staining. Related to pancreatic lipase, C. wrightiana and Padina arborescens showed significant inhibition. Further fractionation of C. wrightiana, which showed the most potent activity, suggested that $CHCl_3$ and n-BuOH fraction are responsible for adipocyte differentiation inhibition, whereas n-BuOH and $H_2O$ fraction for pancreatic lipase inhibition. Our study also demonstrated that n-BuOH fraction was effective both in early and middle stage of differentiation whereas $CHCl_3$ fraction was effective only in early stage of differentiation. Taken together, algae might be new candidates in the development of obesity treatment.