Up until today, the key to contouring has been resumed in these two alternatives, either limiting the adipocyte storing capacity by modulating lipogenesis, or by stimulating lipolysis to eliminate adipocyte lipid content. Another interesting way could be the regulation of adipocyte differentiation. In this work, we have evaluated the effect of a brown algal extract of Sphacelaria scoparia (SSE) on the differentiation of pre-adipocytes into adipocytes. A pre-adipocyte line (3T3-L 1) was used. The differentiation was evaluated by the measure of produced lipids thanks to red oil coloration and spectrophotometry, and also by the expression of adipocyte differentiation markers: enzymes such as fatty acid synthase (FAS) and stearoyl CoA desaturase (SCD), or membrane proteins such as glucose transporters (GLUT -4) and fatty acid transporters (FAT) expressed on the surface of human adipocytes. These genes are under control of two transcription factors: CAAT-enhancer binding protein (c/EBP alpha) and sterol response element binding protein (SREBP1). All these markers were analysed at different stages of differentiation by RT -PCR. Sphacelaria extract (SSE) inhibits pre-adipocytes differentiating into adipocytes following a dose-dependant relation, using a kinetics similar to retinoic acid. It decreases the expression of mRNA specific to FAS, FAT, GLUT -4, SCD1, c/EBP alpha and SREBP1. Moreover, SSE regulated on collagen 1 and collagen 4 expression. A stimulation of collagen 1 was also measured in human skin fibroblasts. Thus, SSE performs as a genuine differentiation inhibitor and not only as a lipogenesis inhibitor, and could be used in slimming products.
Clinical and preclinical trials of involving drugs with anti-obesity effects have focused on screening for herbal medicines suspected to have anti-obesity activities. In this study, an extract of Aster scaver Thunb., which was prepared in 80% methanol (ASE), was assessed for its total phenol content, total flavonoid content, antioxidant activity ability to scavenge the ${\alpha}-{\alpha}$-diphenyl-${\beta}$-picrylhydrazyl, 2,2'-azino-bis-[3-ethylbenzthiazoline]-6-sulfonic acid radical, and anti-adipogenic effects. The anti-adipogenic effect of ASE on the differentiation of 3T3-L1 pre-adipocytes to adipocytes was investigated by assaying the suppression of adipocyte differentiation and lipid accumulation by using western blot analysis and the Oil Red-O assay, respectively. The staining results showed that ASE significantly inhibited 3T3-L1. Western blot analysis results showed that ASE decreased the levels of peroxisome proliferator-activated receptor-${\gamma}$, CCAAT/enhancer-binding protein ${\alpha}$, and sterol regulatory element-binding protein 1c. These results demonstrate that ASE directly inhibits the differentiation of preadipocytes, and might be an important adjunct in the therapeutic efforts to reduce adipogenesis.
Kim, Dong-Gyu;Kang, Min Jung;Suh, Hwa Jin;Kwon, Oh Oun;Shin, Jung Hye
Journal of the Korean Society of Food Science and Nutrition
/
v.45
no.8
/
pp.1107-1113
/
2016
The purpose of this study was to investigate the effects of catechu water extract on adipogenesis in 3T3-L1 adipocytes. 3T3-L1 preadipocytes were differentiated with adipogenic regents by incubation for 9 days in the absence or presence of catechu extract ranging from $1{\sim}200{\mu}g/mL$. The effect of catechu extracts on cell proliferation of 3T3-L1 preadipocytes was investigated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. The effect of catechu extracts on 3T3-L1 differentiation was examined by measuring intracellular lipid droplet and triglyceride contents. These results were obtained from preadipocyte proliferation and adipocyte differentiation of 3T3-L1. Catechu extracts inhibited lipid accumulation and remarkably decreased triglyceride contents in 3T3-L1 preadipocytes at a concentration showing no cytotoxicity. The anti-adipogenic effects of catechu appeared to be mediated by significant down-regulation of expression of peroxisome proliferator-activated receptor ${\gamma}$, CCAAT/enhancer-binding protein ${\alpha}$, and sterol regulatory element-binding protein 1c proteins apart from expression of hormone-sensitive lipase. We suggest that catechu extracts significantly inhibit adipogenesis and can be used for regulation of obesity.
Kim, Jung-Ae;Ahn, Byul-Nim;Oh, Jung Hwan;Karadeniz, Fatih;Lee, Jung Im;Seo, Youngwan;Kong, Chang-Suk
Ocean and Polar Research
/
v.44
no.1
/
pp.29-38
/
2022
Halophytes are plants that live in harsh environments in coastal regions and are known for their diverse chemical compositions. Limonium tetragonum, a halophyte endemic to Korean shores, is known for its bioactive compounds and is utilized in folk medicine. In this study L. tetragonum extract (LHE) was used to determine and evaluate its anti-osteoporotic properties. Pre-adipocyte and pre-osteoblasts were induced to differentiate along with LHE treatment, and their differentiation was evaluated using differentiation markers. LHE treatment decreased lipid accumulation in 3T3-L1 preadipocytes during adipogenesis. Results indicated that the LHE treatment also decreased the levels of key adipogenic transcription factors: PPARγ, SREBP1c, and C/EBPα. Enhancing osteoblastogenesis by LHE treatment was confirmed in osteoblastogenesis-induced MC3T3-E1 pre-osteoblasts. Cells treated with LHE resulted in increased calcification and alkaline phosphatase (ALP) activity compared with osteoblasts without LHE treatment. Pro-osteogenic and anti-adipogenic effects were also confirmed in D1 murine mesenchymal stromal cells which are capable of differentiation into both adipocytes and osteoblasts. LHE hindered adipogenesis and enhanced osteoblastogenesis in D1 MSCs in a similar fashion. In conclusion, L. tetragonum is believed to possess the potential to be utilized as a nutraceutical ingredient against osteoporotic conditions.
Kang, Byung Tae;Choe, Won Kyung;Park, Dong Cheol;Kim, Jong Kuk;Park, Mora;Kim, Sung Ok;Kim, Mi Ryeo
The Korea Journal of Herbology
/
v.29
no.2
/
pp.15-21
/
2014
Objectives : The purpose of this study was to investigate inhibitory effects of steamed Polygonatum odoratum extract (POE) on differentiation and adipogenesis in 3T3-L1 adipocytes. Methods : Polygonatum odoratum (P. odoratum) extract was extracted with ethyl acetate. Total phenolic and flavonoid contents in POE were measured for antioxidant activity. The spectrophotometric method was used to determine the DPPH and ABTS radical scavenging activity and ferric-reducing antioxidant potential (FRAP). MTT assay was examined for cell toxicity, oil red O staining was performed for intracelluar adipogenesis in differentiated 3T3-L1 adipocytes. Western blot analysis for measurement of CCAAT/enhancer-binding protein ${\alpha}$ ($C/EBP{\alpha}$), peroxisome proliferator-activated receptor${\gamma}$ ($PPAR{\gamma}$) and AMP-activated protein kinase (AMPK) expressions were performed. Results : The results revealed that POE has antioxidant activities. Contents of total polyphenolics and flavonoids were $50.83{\pm}1.52$ GAE mg/100g dry weight of POE and $17.05{\pm}2.47$ RE mg/100g dry weight of POE, respectively. DPPH radical scavenging activity, and FRAP in 10 mg/ml concentration were $92.1{\pm}0.6%$, $244.8{\pm}9.0{\mu}M$ Fe(II) and ABTS inhibition in 5 mg/ml concentration was $84.8{\pm}4.1%$. Treatment of POE in adipocytes inhibited the differentiation and adipogenesis of 3T3-L1 adipocytes compared to those of vehicle control. Additionally, protein expressions of $C/EBP{\alpha}$ and $PPAR{\gamma}$, major transcription factor for the adipogenic genes, were significantly decreased compared to those of vehicle control (p<0.05). Futhermore, phosphorylation of AMPK was increased in 3T3-L1 adipocytes treated with POE compared to that of vehicle control (p<0.05). Conclusions : we demonstrate that steamed P. odoratum extract (POE) has potentiating antioxidant activities, inhibits differentiation and lipid accumulation and also induces energy expenditure in adipocytes, which may contribute to antiobesity property.
BACKGROUND/OBJECTIVES: Psidium guajava L. (guava) leaves have been shown to exhibit hypoglycemic and antidiabetic effects in rodents. This study investigated the effects of guava leaf extract on adipogenesis, glucose uptake, and lipolysis of adipocytes to examine whether the antidiabetic properties are mediated through direct effects on adipocytes. MATERIALS/METHODS: 3T3-L1 cells were treated with 25, 50, 100 ㎍/mL of methanol extract from guava leaf extract (GLE) or 0.1% dimethyl sulfoxide as a control. Lipid accumulation was evaluated with Oil Red O Staining and AdipoRed assay. Immunoblotting was performed to measure the expression of adipogenic transcription factors, fatty acid synthase (FAS), and AMP-activated protein kinase (AMPK). Glucose uptake under basal or insulin-stimulated condition was measured using a glucose analog 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl) amino]-2-deoxy-D-glucose. Lipolysis from fully differentiated adipocytes was measured by free fatty acids release into the culture medium in the presence or absence of epinephrine. RESULTS: Oil Red O staining and AdipoRed assay have shown that GLE treatment reduced lipid accumulation during adipocyte differentiation. Mitotic clonal expansion, an early essential event for adipocyte differentiation, was inhibited by GLE treatment. GLE inhibited the expression of transcription factors involved in adipocyte differentiation, such as peroxisome proliferator-activated receptor 𝛄 (PPAR𝛄), CCAAT/enhancer-binding protein α (C/EBPα), and sterol regulatory element-binding protein-1c (SREBP-1c). FAS expression was also decreased while the phosphorylation of AMPK was increased by GLE treatment. In addition, GLE increased insulin-induced glucose uptake into adipocytes. In lipid-filled mature adipocytes, GLE enhanced epinephrine-induced lipolysis but reduced basal lipolysis dose-dependently. CONCLUSIONS: The results show that GLE inhibits adipogenesis and improves adipocyte function by reducing basal lipolysis and increasing insulin-stimulated glucose uptake in adipocytes, which can be partly associated with antidiabetic effects of guava leaves.
Kim, Soo Jin;Kim, Taehee;Choi, Han Na;Cho, Eun Jung;Park, Jin Bong;Jeon, Byeong Hwa;Lee, Sang Do
The Korean Journal of Physiology and Pharmacology
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v.20
no.6
/
pp.649-655
/
2016
TonEBP belongs to the Rel family of transcription factors and plays important roles in inflammation as well as kidney homeostasis. Recent studies suggest that TonEBP expression is also involved in differentiation of several cell types such as myocytes, chondrocytes, and osteocytes. In this study, we investigated the roles of TonEBP during adipocyte differentiation in 3T3-L1 cells. TonEBP mRNA and protein expression was dramatically reduced during adipocyte differentiation. Sustained expression of TonEBP using an adenovirus suppressed the formation of lipid droplets as well as the expression of FABP4, a marker of differentiated adipocytes. TonEBP also inhibited the expression of $PPAR{\gamma}$, a known master regulator of adipocytes. RNAi-mediated knock down of TonEBP promoted adipocyte differentiation. However, overexpression of TonEBP did not affect adipogenesis after the initiation of differentiation. Furthermore, TonEBP expression suppressed mitotic clonal expansion and insulin signaling, which are required early for adipocyte differentiation of 3T3-L1 cells. These results suggest that TonEBP may be an important regulatory factor in the early phase of adipocyte differentiation.
Objectives : We Investigated the effect of Dioscoreae Rhizoma(山藥) on the change of the corticosterone and the rectal temperature(直腸溫渡) of the mice induced by starvation stress(創戰 스트레스). Methods : After administration of Dioscoreae Rhizoma (0.25g/kg, 0.5g, 1.0g/kg, 3g/kg) three times, mice were starved. The corticosterone and rectal temperature were measured after 36.5 hours starvation stress. Results : The plasma cortiosterone levels in the S-2, S-3 and S-4 group were decreased significantly comparing with the control group (P<0.01) after 36.5 hours starvation stress. and rectal temperature was decreased in the control goup comparing with the normal group, but there is no significant change in the Dioscoreae Rhizoma treated group. Conclusion : it might be recognized that Dioscoreae Rhizoma has preventive-effect against starvation stress and also it might be needed further study in various viewpoints. Objectives : This study was disegned to elucidate the short term effect of Rossa rugosae Radix on proliferation. differentiation and maturation of 3T3-L1 Preadipocyte. Methods: 3T3-L1 preadipocytes obtained from Korean Cell Line Bank were cultured in a D ulbecco’ s modified eagle medium(MEM) culture solution containing 10% fetal bovine serum(FBS) and various concentrations of aqueous extract of Rossa rugosae Radix.. The short term effect of the extract of Rossa rugosae Radix on proliferation. differentiation and maturation of 3T3-L1 preadipocytes were investigate after treatment for 24 hours by measuring MTT. Oil Red 0 and latate dehydrogenase activity.. Results: The Rossa rugosae Radix extract inhibited significantly the proliferation of 3T3-L1 preadipocytes and tended to increase latate dehydrogenase activity in the media of differentiated 3T3-L1 preadipocytes & matured 3T3-L1 preadipocytes. the extract also inhibit the lipid accumulation of differentiated 3T3-L1 preadipocytes & matuered 3T3-L1 preadipocytes. Conclusions: These results demonstrated that the Rossa rugosae Radjx extract inhibited the proliferation. differentiation and maturation of 3T3-L1 preadipocytes. suggesting that Rossa rugosae Radix has anti-obesity effect: however further in vivo study is needed to demonstrate its pharmacological effects.
Chul Hwan Kim;Seok-Chun Ko;Hyun-Soo Kim;Gun-Woo Oh;Ji-Yul Kim;Kyung Woo Kim;Jeong Min Lee;Myeong-Seok Lee;Yun Gyeong Park;Gyeong Lee;Jae-Young Je;Jung Hye Won;Young Jun Kim;Dae-Sung Lee
Journal of Marine Bioscience and Biotechnology
/
v.15
no.2
/
pp.59-66
/
2023
Dictyopteris divaricata, a type of marine brown algae, has been studied for its various biological properties, including anti-inflammatory, antidiabetic, and whitening effects. However, its potential antiobesity effects have not been extensively explored. This study aimed to examine the impact of D. divaricata ethanol extract (DDE) on adipocyte differentiation and adipogenesis using 3T3-L1 preadipocytes. Our results showed that when 3T3-L1 preadipocytes were treated with noncytotoxic concentrations of DDE there was a concentration-dependent decrease in fat accumulation rate and triglycerid production compared with the control. Furthermore, DDE significantly reduced the expression of transcription factors (PPARγ, C/EBPα, and SREBP-1) and fatty acid transport protein (FABP4), which are crucial for 3T3-L1 preadipocyte differentiation. These findings suggest that DDE may exhibit antiobesity effects by suppressing the expression of lipogenic transcription factors and fatty acid transport proteins. Therefore, DDE holds potential as a therapeutic agent for obesity.
Objectives : Although Yeoldahanso-tang (YDHST) has been widely used for treatment of obesity and its related diseases such as hyperinsulinemia and hypertension for Taeeumin, no scientific evidence has reported yet to support its ability to work against these metabolic disorders. Our study was aimed to investigate the anti-obesity effect of YDHST extract on the cellular differentiation of 3T3-L1 preadipocytes into adipocytes. Methods : 3T3-L1 preadipocytes were differentiated into adipocytes by adding insulin, dexamethasone and 3-isobutyl-1-methylxanthine (IBMX) for 8 days in the absence or presence of YDHST extract. Anti-obesity effects of YDHST extract were evaluated by Oil Red O staining, glycerol-3-phosphate dehydrogenase (GPDH) activity, triglyceride contents, and leptin production. Results : YDHST extract remarkably prevented lipid accumulation with no cytotoxicity in the differentiated 3T3-L1 cells. In addition, YDHST extract decreased contents of triglyceride 3T3-L1 adipocytes. Consistently, YDHST extract caused a significant inhibition of GPDH activity and leptin production in a dose-dependent manner. Conclusions : Our findings suggest that Sasang constitutional herbal formula YDHST for Tae-eumin has anti-obesity activity by regulation of the adipogenesis process in vitro. Additional study will be required to further confirm the inhibitory effect on adipocyte differentiation by using in vivo animal model.
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