• 대한화장품학회:학술대회논문집
• /
• 대한화장품학회 2003년도 IFSCC Conference Proceeding Book I
• /
• pp.440-447
• /
• 2003

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.

• Animal Bioscience
• /
• 제36권11호
• /
• pp.1747-1756
• /
• 2023

Objective: The objective of this study was to evaluate the effects of four different cooking techniques viz: boiling, grilling, microwave, and frying; on the physicochemical characteristics of camel meat. Methods: Protein composition and their degradation as well as biochemical and textural changes of camel meat as influenced by cooking methods were investigated. Results: The highest cooking loss (52.61%) was reported in microwaved samples while grilled samples showed the lowest cooking loss (44.98%). The microwaved samples showed the highest levels of lipid oxidation as measured by thiobarbituric acid reactive substances, while boiled samples showed the lowest levels (4.5 mg/kg). Protein solubility, total collagen, and soluble collagen content were highest in boiled samples. Boiled camel meat had lower hardness values compared to the other treated samples. Consequently, boiling was the more suitable cooking technique for producing camel meat with a reduced hardness value and lower lipid oxidation level. Conclusion: The camel meat industry and camel meat consumer can benefit from this research by improving their commercial viability and making consumers aware about the effects of cooking procedures on the quality of camel meat. The results of this study will be of significance to researchers and readers who are working on the processing and quality of camel meat.

• 한국근적외분광분석학회:학술대회논문집
• /
• 한국근적외분광분석학회 2001년도 NIR-2001
• /
• pp.4103-4103
• /
• 2001

The aim of this study was to examine whether near infrared spectroscopy (NIRS) is an acceptable tool to determine cholesterol and collagen in human atherosclerotic plaque without destruction of the analyzed areas and without danger the endothelial cells - three preconditions for the development of a NIR-heart-catheter. The questions were: Can the cholesterol and collagen content of the arterial intima be estimated with acceptable precision in vitro by NIRS despite the matrix inhomogeneity of the plaques and their anatomic variability\ulcorner How deep can such NIR radiation penetrate into arterial tissue without danger for endothelial cells\ulcorner Is this penetration sufficient for information on the lipid and collagen accumulation\ulcorner Using NIRS, cholesterol and collagen can be determined with acceptable precision in model mixtures and human aortic specimens (r=0,896 to 0,957). The chemical reference method was HPLC. The energy dose was 71 mW/$cm^{-2}$ using a fiber optic strand with a length of 1.5m and an optical window of d=4mm. This dose appears to be not dangerous for endothelial cells, It will be attenuated to 50% by a arterial tissue of about 170-$200\mu\textrm{m}$ thickness. The results are also acceptable using a thin coronary catheter-like fiber optic strand (d=1mm).

• Animal Bioscience
• /
• 제34권10호
• /
• pp.1684-1694
• /
• 2021

Objective: This study investigated the association between feed efficiency, physicochemical properties, flavor precursors and biomolecules in the thigh meat of Korat (KR) chickens. Methods: The feed intake and body weight of individual male KR chickens were recorded from 1 to 10 weeks old to calculate the individual residual feed intake (RFI) of 75 birds. At 10 weeks of age, chickens with the 10 highest (HRFI) and lowest RFI (LRFI) were slaughtered to provide thigh meat samples. The physicochemical properties (ultimate pH, water holding capacity [WHC], drip loss) and flavor precursors (guanosine monophosphate, inosine monophosphate (IMP), adenosine monophosphate and inosine) were analyzed conventionally, and Fourier transform infrared spectroscopy was used to identify the composition of biomolecules (lipids, ester lipids, amide I, amide II, amide III, and carbohydrates) and the secondary structure of the proteins. A group t-test was used to determine significant differences between mean values and principal component analysis to classify thigh meat samples into LRFI and HRFI KR chickens. Results: The physicochemical properties of thigh meat samples from LRFI and HRFI KR chickens were not significantly different but the IMP content, ratios of lipid, lipid ester, protein (amide I, amide II) were significantly different (p<0.05). The correlation loading results showed that the LRFI group was correlated with high ratios of lipids, lipid esters, collagen content (amide III) and beta sheet protein (rg loading >0.5) while the HRFI group was positively correlated with protein (amide I, amide II), alpha helix protein, IMP content, carbohydrate, ultimate pH and WHC (rg loading >0.5). Conclusion: The thigh meat from chickens with different RFI differed in physiochemical properties affecting meat texture, and in the contents of flavor precursors and biomolecules affecting the nutritional value of meat. This information can help animal breeders to make genetic improvements by taking more account of traits related to RFI.

• 한국식품영양과학회지
• /
• 제37권9호
• /
• pp.1148-1153
• /
• 2008

참돔을 보다 효율적으로 이용할 목적으로 참돔의 급이 및 비급이에 따른 조직감과 같은 기호적 특성에 대하여 비교하여 살펴보았다. 비급이 참돔의 수분함량 및 조지방 함량은 각각 72.7% 및 3.7%로, 급이 참돔의 각각 70.0% 및 6.6%에 비하여, 수분함량의 경우 약 3%가 높았고, 조지방 함량의 경우 약 3%가 낮아 5% 유의수준에서 차이가 있었다. 근육의 경도는 비급이 참돔이 $0.93\;kg/cm^2$으로, 급이 참돔의 $0.47\;kg/cm^2$에 비하여 조직감이 다소 강하리라 추정되었다. 콜라 겐 함량, 콜라겐의 아세트산에 대한 용해도, 산가용성 콜라겐의 열변성 온도 및 전기영동적 분자구성 등의 결과로 미루어 보아 급이 및 비급이 참돔 근육 유래 콜라겐 간에는 차이가 없었다. 이와 같은 지질함량, 콜라겐의 특성, 경도 및 관능적 조직감의 결과로 미루어 보아 비급이 참돔 및 급이 참돔간에 근육의 조직감 차이는 지질 함량에 의한 영향이라 판단 되었다.

• Toxicological Research
• /
• 제22권3호
• /
• pp.267-273
• /
• 2006

Tungtungmadic acid(3-caffeoyl, 4-dihydrocaffeoyl quinic acid: CDCQ) is a new chlorogenic acid derivative isolated from the Salicornia herbacea. The suppressive effects of CDCQ on the progress of acute carbon tetrachloride($CCl_4$)-induced hepatic fibrosis were investigated in mice. CDCQ significantly suppressed $CCl_4$-induced hepatic necrosis and inflammation, as determined by serum enzymatic activities of alanine and aspartate aminotransferase and serum TNF-$\alpha$ levels in a dose-dependent manner. In addition, increased hepatic lipid peroxidation and fibrosis after acute $CCl_4$ treatment were suppressed by the administration of CDCQ. CDCQ also significantly prevented the elevation of hepatic hydroxyproline and collagen content and ${\alpha}$-smooth muscle actin(${\alpha}$-SMA) expression in the liver of $CCl_4$-intoxicated mice. These results suggest that the suppressive effects of CDCQ against the acute $CCl_4$-induced hepatic fibrosis possibly related to its ability to block both hepatic inflammation and the activation of hepatic stellate cells.

• 약학회지
• /
• 제45권5호
• /
• pp.513-521
• /
• 2001

The chronic cholestasis induce to biliary liver fibrosis (cirrhosis) and the increased products of ROS(reactive oxygen species) cause to the liver damage. In this study ; the antioxidant and antifibrotic effect of dried extracts of oriental medicine (DW) was investigated under the liver fibrotic (cirrhotic) condition. The female Sprague-Dawley rats were divided in 5 groups (Normal, Op-2, Op-4, OpDW-2, OpDW-4). Except for normal group, the rats were induced to biliary liver fibrosis (cirrhosis) by the operation of bile duct ligation/scission (BDU/S) and were observed in 2 weeks or 4 weeks. And the prepared DW was treated p.o.2 ml/day/rats in 2 weeks or 4 weeks for OpDW groups. At the time of sacrifice, the liver, kidney, spleen were weighed and the ratio of organ weight/body weight was calculated. The MDA, the hyp and biochemical parameters (GOT GTP, ALP, t-bili) were measured in sera and liver tissue of rats. The biochemical change was observed on liver tissue. In the result, the hepatomegaly and spleenomegaly appeared in all BDL/S operated rats, and significantly lower liver weight was observed in OpDW-4 group compared with in Op-4 group (p<0.05). The level of clinical parameters in sera of all liver fibrosis (cirrhosis) developed rats was higher than in normal group. Especial1y, the value of GOT in OpDW-2 group and ALP in OpDW-4 group showed significantly lower than in Op-2 group and Op-4 group (p<0.01, p<0.005). The content of hyp in all operation groups was significantly higher than in normal group (p<0.05∼<0.005), and showed significantly lower value in the OpDW-4 group than in Op-4 group (p<0.05). The product of lipid peroxidationUDA) increased significantly under the fibrotic(cirrhotic) condition (p<0.05∼ <0.005), and the MDA value in OpDW-4 group decreased significantly in Op-4 group (p<0.005). The histological change (bile duct proliferation, fibrosis, collagen bundle) was similarly observed in Op-2 group and in OpDW-2 group, but the weak fibrosis and bile duct proliferation were observed in OpDW-4 group compared with in Op-4 group. In conclusion, lipid peroxidation and severe liver damage were activated by bile duct obstruction, and the measurement of MDA and hap can be useful monitor for the screening of antioxidant and antifibrotic effect in experimental liver fibrosis (cirrhosis). The 4 weeks treatment with DW extracts suppressed lipid peroxidation and inhibited fibrotic (cirrhotic) process in BDL/S operated rats.

• 한국축산식품학회지
• /
• 제44권4호
• /
• pp.779-789
• /
• 2024

The effects of irradiation on meat constituents including water, proteins, and lipids are multifaceted. Irradiation leads to the decomposition of water molecules, resulting in the formation of free radicals that can have both positive and negative effects on meat quality and storage. Although irradiation reduces the number of microorganisms and extends the shelf life of meat by damaging microbial DNA and cell membranes, it can also accelerate the oxidation of lipids and proteins, particularly sulfur-containing amino acids and unsaturated fatty acids. With regard to proteins, irradiation affects both myofibrillar and sarcoplasmic proteins. Myofibrillar proteins, such as actin and myosin, can undergo depolymerization and fragmentation, thereby altering protein solubility and structure. Sarcoplasmic proteins, including myoglobin, undergo structural changes that can alter meat color. Collagen, which is crucial for meat toughness, can undergo an increase in solubility owing to irradiation-induced degradation. The lipid content and composition are also influenced by irradiation, with unsaturated fatty acids being particularly vulnerable to oxidation. This process can lead to changes in the lipid quality and the production of off-odors. However, the effects of irradiation on lipid oxidation may vary depending on factors such as irradiation dose and packaging method. In summary, while irradiation can have beneficial effects, such as microbial reduction and shelf-life extension, it can also lead to changes in meat properties that need to be carefully managed to maintain quality and consumer acceptability.

• 생명과학회지
• /
• 제26권1호
• /
• pp.83-90
• /
• 2016

본 연구는 방풍나물 에탄올 추출물을 이용하여 갱년기 유도 흰쥐의 혈중지질 수준의 향상, 항 혈소판 응집력에 미치는 효과를 검토하고자 하였다. 9주령 흰쥐를 각 군당 6마리씩 난소절제 모의 수술군, 난소절제군, 난소절제 후 방풍나물 추출물 50 mg/kg/day 및 200 mg/kg/day군의 4군으로 나누어 시술 후 6주간 추출물을 투여하며 사육하였다. 동물실험 결과 갱년기 유도로 인하여 증가된 혈청 중 중성지방 및 총콜레스테롤 함량은 방풍나물 추출물의 투여에 의해 저하되었다. 혈중 LDL-콜레스테롤 함량은 방풍나물 추출물 200 mg/kg/day 투여에 의해 난소절제 대조군(OVX-CON)에 비해 유의하게 감소하였다. 또한 방풍나물 추출물의 항 혈전능에 미치는 영향을 검토하기 위해, 난소절제로 인하여 혈 중 지질 함량이 증가한 상태에서 washed platelet을 분리하고 콜라겐으로 혈소판 응집을 유도하였다. 그 결과 방풍나물 추출물을 투여한 군이 OVX-CON군에 비해 혈소판 응집을 억제하는 것으로 나타났다. 응집율을 나타내는amplitude (%)는 OVX-CON군이 난소절제를 하지 않은 SHAM군과 비교하여 증가하였으나, 방풍나물 추출물 투여군인 OVX-LS50 및 OVX-LS200군 모두에서 유의적으로 감소하는 결과를 나타내었다. 비교하여 반응이 일어나기 시작하는 속도를 나타내는Slop은 SHAN군에 비해 난소절제로 인해 OVX-CON군이 증가하였으나, 방풍나물 추출물 투여군에서 OVX-CON군에 비해 유의적으로 감소하는 결과를 나타냈다. 응집시간을 나타내는 lag time (sec)은 난소절제에 의해 반응이 일어나는 시간이 짧아져, 혈소판 응집이 촉진되는 결과가 나타났다. 방풍 나물 추출물 투여한 경우, 200 mg/kg/day 투여군인 OVX-LS200군의 경우 OVX-CON군에 비해 lag time이 연장되어 혈소판 응집이 지연되는 결과가 나타났다. 난소절제 시(OVX-CON군) 에스트로겐 결핍으로 골 교체가 증가되어 SHAM군에 비해 혈청 중의 ALP 활성이 증가되었으나 유의성 있는 결과는 나타나지 않았다. 한편, 방풍나물 추출물 투여군에서는 난소절제로 인하여 그 활성이 증가된 OVX-CON군에 비해 활성이 감소하는 경향을 나타내었으며, 200 mg/kg/day 투여군의 경우 SHAM군보다 활성이 감소하여 난소 절제로 인한 골 손실 정도를 완화시켜준 것으로 추측된다. 연골의 경우 비 난소절제군인 SHAM군에 비해 난소절제군인 OVX-CON군의 collagen 함량이 감소하였으나, 방풍 에탄올 추출물을 투여함으로써 OVX-LS200 군에서 유의적으로 증가하였으며, 골 조직에서 또한 난소를 절제한 OVX-CON군이 난소를 절제하지 않은 SHAM군과 비교해 유의적으로 감소하는 결과가 나타났다. 한편, 난소를 절제한 후 방풍 추출물을 50 mg/kg/day 투여한 OVX-LS50군에서는 대조군에 비해 collagen 함량이 증가하는 경향이 나타났으며, 200 mg/kg/day 투여한 OVX-LS200군의 경우 유의적으로 증가하였다. 이상과 같이 방풍나물 추출물은 난소절제로 인하여 증가된 혈중 지질 조성 개선 및 에스트로겐 부족으로 인한 골 손실의 예방에 유익한 효과를 가질 것으로 기대된다.

• 약학회지
• /
• 제46권2호
• /
• pp.129-136
• /
• 2002

The pathogenesis of cholestatic liver injury as well as the modulation of hepatic fibrogenesis is causally associated with involvement of reactive oxygen species (ROS) and free radical reactions. In this study, we investigated whether dried extracts of oriental medicine (LH) have antioxidant and antifibrotic effect under the biliary liver fibrosis (cirrhosis) c ondition. The female Sprague-Dawley rats were divided in six groups (Normal, N-LH, op-2, op-4, opLH-2, opLH-4) and were observed in 2 weeks or 4 weeks. For this purpose the rats were operated by bile duct ligation/scission (BDL/S), which induced to liver fibrosis and cirrhosis. After surgery, the prepared LH was administered p.o. 2 mι/day/rat in 2 weeks or 4 weeks for opLH groups. During the observation period, jaundices appeared in eyes, ears and tail of all BDL/S operated rats. And at the time of sacrifice, cholestasis was observed in proximal bile duct, especially the color of bile juice and urine in opLH-4 group showed more clear than op-2, op-4 and opLH-2 group. The value of clinical parameters and product of lipid peroxidation (MDA) in sera and the hydroxyproline (hyp) content in liver tissue were significantly increased in all liver fibrosis (cirrhosis) developed rats (p＜0.001~0.05). Among the clinical parameters of sera, value of BUN, ALP in opLH-4 group showed significantly lower than in op-4 group (p＜0.05, p＜0.001). The content of hyp in opLH-2, opLH-4 group (478.0 $\pm$ 134.3 $\mu\textrm{g}$/g 897.5 $\pm$ 118.2 $\mu\textrm{g}$/g) showed lower than in op-2, op-4 group (528.9 $\pm$ 220.7 $\mu\textrm{g}$/g, 1023.8 $\pm$ 277.1 $\mu\textrm{g}$/g) and then the value of MDA in opLH-4 was also significantly reduced to 59.4% of that in op-4 group (p＜0.001). The histological change (bile duct proliferation, fibrosis, collagen bundle) was similarly observed in op-2 group and in opLH-2 group, but the weak fibrosis and bile duct proliferation were observed in opLH-4 group compared with in op-4 group. Our data indicate that the 4 weeks treatment with LH extract suppressed lipid peroxidation and inhibited fibrotic (cirrhosis) process, and experimental cholestatic liver disease is associated with increased lipid peroxidation in BDL/S operated rats. Hence we concluded that the measurement of MDA and hyp can be useful monitor for the screening of antioxidant and antifibrotic effect in experimental liver fibrosis (cirrhosis), and LH has been shown to have hepatoprotective effect, antifibrotic effect and antioxidant effect.