• Radiation Oncology Journal
• /
• 제21권3호
• /
• pp.222-226
• /
• 2003

목적: 변이를 보이는 lpr 마우스와 Fas ligand 변이를 보이는 gld 마우스를 이용하여 in vivo에서 Fas와 Fas ligand의 발현이 전리 방사선에 의해 유도되는 apoptosis에서 어떤 역할을 하는지 조사하고자 하였다. 대상 및 방법: Fas의 변이를 보이는 $C57BL/6J-Fas^{lpr}$ 마우스와 대조군인 C57BL/6J 마우스, Fas ligand 변이를 보이는 $C3H/HeJ-Fas^{gld}$ 마우스와 대조군인 C3H/HeJ 마우스를 대상으로 하였다. 마우스는 8주령 웅성으로서 전신 방사선 조사하여 일정 시간 후 비장을 적출하였다. 조직을 hematoxylin-eosin 염색하여 apoptosis 유도 수준을 비교 분석하였다. 또한 apoptosis 조절 물질인 p53, Bcl-2, Bax, Bcl-X_L,\;Bcl-X_S$에 대하여 Western Western blotting을 시행하고 발현수준을 densitometry로 분석하여 관련된 기전을 연구하였다. 결과: 2.5 Gydh k10 Gy 조사시에 $C57BL/6J-Fas^{lpr}$ 마우스와 $C3H/HeJ-Fas^{gld}$ 마우스에서 대조군 비하여 방사선에 의한 apoptosis가 유의하게 감소되는 것으로 나타났다(p<0.05). C57BL/6J 마우스와, C3H/HeJ 마우스에서 10 Gy 방사선 조사 후 Bax가 8시간 째에 각각 3배, 3.3배의 증가를 보였으나 $C57BL/6J-Fas^{lpr}$ 마우스와, $C3H/HeJ-Fas^{gld}$ 마우스에서는 뚜렷한 발현증가가 관찰되지 않았다. 결과: Fas의 변이가 있는 lpr 마우스와 Fas ligand의 변이가 있는 gld 마우스에서 방사선에 의한 apoptosis가 대조군 보다 현저하게 낮으며 이는 방사선에 의한 Bax의 유도가 미약한 것과 연관된 것으로 나타났다. 방사선에 의한 apoptosis 유도에 Fas의 역할이 매우 중요한 것으로 보인다.

• 한국가축번식학회지
• /
• 제27권1호
• /
• pp.69-75
• /
• 2003

본 연구의 목적은 inbred 마우스 (C57BL/6J)의 수정란을 이용하여 형질전환마우스를 생산할 때, 수정란이식의 효율성을 증진시키기 위한 것이다. C57BL/6J 및 BCF1 마우스로부터 과배란처리 방법에 의해 수정란을 얻고, DNA를 1 세포기 수정란에 미세 주입한 다음, 1세포기 또는 2 세포기의 수정란을 가임신된 마우스의 한쪽 또는 양쪽 난관에 각각 이식하였다. 1세포기의 수정란을 0.75 d.p.c. 가임신된 마우스의 한쪽 난관에 이식했을 때, 임신율이 C57BL/6J는 68.8$\pm$7.83%, BCF1은 48.3$\pm$14.22% 이었고, 이식한 수정란 당 산자의 발달율은 C57BL/6J가 11.9$\pm$5.51%, BCF1은 10.5$\pm$8.03%로 성적이 저조하였다. 그러나, 2세포기의 수정란을 0.5 d.p.c. 가임신된 마우스의 양쪽 난관에 이식했을 때, 임신율이 C57BL/6J는 94.4$\pm$9.64%, 13CFl은 100$\pm$0% 이었고, 이식한 수정란 당 산자의 발달율은 C57BL/6J가 22.1 $\pm$0.4%, BCF1은 21.8$\pm$0.38%였다. 따라서 C57BL/6J 마우스의 2세포기 수정란을 0.5 d.p.c. 가임신된 마우스의 양쪽 난관에 이식하는 것이, BCF1마우스와 유사한 성적을 얻어 경쟁력이 있는 것으로 판단되었다. 이러한 결과에 영향을 미치는 인자가 여러 가지 있을 것으로 판단되지만, C57BL/6J 마우스의 2세포기 수정란을 0.5 d.p.c.가임신된 마우스의 양쪽 난관에 이식하는 방법이 다른 방법보다 형질전환마우스를 생산하는데 효율성이 더 높은 것으로 본 실험에서 확인되었다.

• Journal of the Korean Wood Science and Technology
• /
• 제48권2호
• /
• pp.166-180
• /
• 2020

Rhododendron schlippenbachii have been used as a medicine because of their various biological activities. In this study, R. schlippenbachii ethanol extract was evaluated for the treatment of vitiligo. The R. schlippenbachii ethanol extract did not show any cell cytotoxicity. The effect on mushroom tyrosinase and cellular tyrosinase activities were further assessed. In addition, the determination of melanin content in melanocytes was measured using both the B16 melanoma cells and C57BL/6J Ler-vit/vit mice. Finally, the existence of quercetin in R. schlippenbachii was confirmed by qualitative analysis using HPLC. The results clearly demonstrated the R. schlippenbachii extract enhanced melanogenesis and also increased tyrosinase activity in cultured melanoma cells and C57BL/6J Ler-vit/vit mice. In addition, treatment with R. schlippenbachii extract led to a higher content of melanin and eumelanin in C57BL/6J Ler-vit/vit mice hair than in control (untreated) mice, which demonstrated the therapeutic effect of hair-graying associated with vitiligo. Finally, we confirmed a notable increase in melanocytes in the skin of C57BL/6J Ler-vit/vit mice treated with R. schlippenbachii extract compared with the control. Extracts of R. schlippenbachii was shown to be potent tyrosinase and melanin synthesis activator in B16 melanoma cells. The R. schlippenbachii extract have significantly higher melanin content than the untreated control in C57BL/6J Ler-vit/vit mice hair. The results suggest that R. schlippenbachii extract might be considered as an alternative treatment for improvement of vitiligo.

• 대한의생명과학회지
• /
• 제13권2호
• /
• pp.99-104
• /
• 2007

To determine whether 17$\beta$-estradiol induces the morphological changes in adipose and liver tissues, we measured the effects of 17$\beta$-estradiol on adipose tissue mass, adipocyte histology and hepatic lipid accumulation in female ovariectomized (OVX) C57BL/6J mice. Compared to vehicle-treated control mice, 17$\beta$-estradiol-treated mice decreased adipose tissue mass and the size of adipocytes, and concomitantly increased the number of adipocytes in a dose-dependent manner. In addition, the administration of 17$\beta$-estradiol resulted in reduced hepatic lipid accumulation in a dose-dependent manner. These results suggest that estrogen may regulate adipocyte development and lipid metabolism in female OVX C57BL/6J mice.

• 대한지역사회영양학회지
• /
• 제9권4호
• /
• pp.536-544
• /
• 2004

To evaluate the antioxidative effect of maengjong-juk (Phyllostachys pubescens) extract coated rice in vivo system, maengjong-juk extract coated rice diets were fed to C57BL/6 mice for 16 weeks. Plasma total antioxidative capacity, hepatic lipid peroxidation, protein oxidation, activities of antioxidative enzymes and total glutathione content were measured. Plasma total antioxidative capacity was elevated significantly in maengjong-juk extract diets supplemented group in a dose dependant manner. Hepatic TBARS contents were significantly decreased in maengjong-juk extract diets supplemented group compared to high cholesterol group. Maengjong-juk extract coated rice diets suppressed the protein oxidation significantly in liver. Activities of hepatic antioxidative enzymes such as total SOD, CuㆍZn-SOD, Mn-SOD, GSH-Px and catalase activities of maengjong-juk extract coated rice diets were significantly higher than those of high cholesterol diet. Total hepatic glutathione content was significantly increased by maengjong-juk extract coated rice diets administration. According to this study, numerous antioxidative materials and phytochemicals containing in maengjong-juk extracts appear to protect antioxidative systems in C57BL/6 mice fed bamboo extract coated rice diet. (Korean J Community Nutrition 9(4): 536∼544, 2004)

• Journal of Ginseng Research
• /
• 제45권6호
• /
• pp.744-753
• /
• 2021

Background: Gintonin-enriched fraction (GEF) is a new non-saponin component glycolipoprotein isolated from ginseng root. This study examined the effect of GEF on age-related sarcopenia in old C57BL/6J mice. Methods: Young (3-6 months) and old (20-24 months) C57BL/6J mice received oral GEF (50 mg/kg/day or 150 mg/kg/day) daily for 5 weeks. During the oral administration period, body weight and grip strength were measured weekly. After sacrifice, muscles from the hindlimb were excised and used for hematoxylin and eosin staining and western blotting to determine the effects of GEF on sarcopenia. The thymus was photographed to compare size, and flow cytometry was performed to examine the effect of GEF on immune homeostasis in the thymus and spleen. Blood samples were collected, and the concentrations of pro-inflammatory cytokines and IGF-1 were measured. Results: GEF caused a significant increase in muscle strength, mass, and fiber size in old mice. GEF restored age-related disruption of immune homeostasis by maintaining T cell compartments and regulating inflammatory biomarkers. Thus, GEF reduced common low-grade chronic inflammatory parameters, which are the main cause of muscle loss. Conclusion: GEF maintained immune homeostasis and inhibited markers of chronic inflammation, resulting in anti-sarcopenia effects in aged C57BL/6J mice. Thus, GEF is a potential therapeutic agent that slows sarcopenia in the elderly.

• Food Science and Biotechnology
• /
• 제16권6호
• /
• pp.894-901
• /
• 2007

This study investigated the effects of cell cultured Acanthopanax senticosus extract (ASE) supplementation and swimming exercise on lipid profiles and carnitine concentrations in C57BL/6J mice fed high fat diets. Male C57BL/6J mice (n=50), aged 4 weeks, were divided into 5 groups based on exercise and/or ASE supplementation (0.5 g/kg of body weight): normal diet (N-C), high fat diet (H-C), high fat diet non-supplement & exercise (H-NSE), high fat diet supplement & no exercise (H-SNE), high fat diet supplement & exercis (H-SE). Liver nonesterified carnitine (NEC) was significantly higher in the H-SNE group than in the H-C group, and liver total carnitine (TCNE) levels were significantly higher in the H-SNE group than in the H-NSE and H-SE groups. Liver and muscle carnitine palmitoyltransferase-I (CPT-I) mRNA levels tended to be higher with ASE supplementation and/or exercise. These results suggest that supplementation with ASE and/or exercise might have a role in improving lipid oxidation.

• Preventive Nutrition and Food Science
• /
• 제10권1호
• /
• pp.34-39
• /
• 2005

This study examined the anti-diabetic effect of a silkworm extract in C57BL/6J mice, an ob/㏈ model, fed a high fat diet for 8 weeks. The body weight was not significantly different with the silkworm-extract supplement, nor did food intake and body weight gains also did not differ significantly among the high-fat diet groups. However, the water intake by the silkworm-extract supplemented groups increased significantly compared with that by the distilled-water supplement group, nonetheless, the FER did not differ significantly. For all groups, the blood glucose increased the most after 30 minutes and yet returned to a fasting level within 90 minutes. The fasting time and resulting glucose tolerance for the silkworm-extract supplemented groups were significantly decreased compared to that for the high fat diet with distilled water supplement group, while the level of blood glucose in silkworm-extract supplemented groups was significantly decreased compared with than in the diabetic control group. The HbA1c and insulin levels were no different among the groups. The sucrase and lactase activities in the proximal small intestine were significantly decreased in the silkworm-extract supplement groups compared to that in the diabetic control group. There was no significant difference in the glycogen contents in the liver and muscle among the groups. In conclusion, it was found that the silkworm-extract supplement repressed the disaccharidase activity in the small intestines mucosa of the C57BL/6J mice.

• Journal of Acupuncture Research
• /
• 제23권2호
• /
• pp.1-19
• /
• 2006

Objectives : The aim of this study was to investigate the hypoglycemic and hypolipidemic activities and mechanisms of Acanthopanax senticosus (AS) herbal acupuncture. Methods : Anti-diabetic and anti-steatotic activity of the AS herbal acupuncture was investigated on C57BL/6J ob/ob mice. After random grouping at the age of 9 weeks, the herbal acupuncture groups were injected subcutaneously at the left and right Gansu (BL18) corresponding acupuncture points alternately on exactly the same time every day with 0.1ml of either 400 mg/kg or 800 mg/kg of AS (AS400 and AS800) for 8-week period. As a positive control, metformin was administrated at a dose of 300 mg/kg (MT300). Body weights were measured weekly, and on every other week blood was collected for blood glucose analysis. At the end of study, blood was also collected for determination of plasma insulin and lipid levels, after which they were killed and periepidydimal fat, liver, muscle, and pancreas were immediately removed. The removed tissues were instantly soaked in liquid nitrogen and stored at $-70^{\circ}C$ for morphological examination and mRNA analysis. Results : The AS herbal acupuncture significantly prevented weight gain on C57BL/6J ob/ob mice. The AS herbal acupuncture lowered blood glucose and improved glucose tolerance in C57BL/6J ob/ob mice. The increase of insulin response during the OGTT was inhibited by the AS herbal acupuncture. Insulin sensitivity of skeletal tissue was enhanced. Plasma lipid levels were significantly improved in the AS herbal acupuncture groups. The AS herbal acupuncture decreased hepatic lipogenesis and hepatic triglyceride production, and increased fatty acid (FA) transporter that involves in FA uptake. The AS herbal acupuncture inhibited the increase of liver mass by prevention of the accumulation of TG but did not inhibit weight gain of fat tissue on C57BL/6J ob/ob mice. Conclusion : In summary, we have demonstrated several unique properties of the AS herbal acupuncture in decreasing body weight, and reversing insulin resistance and hepatic steatosis in ob/ob mice. This AS herbal acupuncture acts as an insulin sensitizer and specifically decreases circulating glucose and lipids, and suppresses hepatic lipogenesis.

• Nutrition Research and Practice
• /
• 제9권5호
• /
• pp.472-479
• /
• 2015

BACKGROUND/OBJECTIVES: The goal of this study was to examine the effect of Sargassum coreanum extract (SCE) on blood glucose concentration and insulin resistance in C57BL-KsJ-db/db mice. MATERIALS/METHODS: For 6 weeks, male C57BL/KsJ-db/db mice were administrated SCE (0.5%, w/w), and rosiglitazone (0.005%, w/w). RESULTS: A supplement of the SCE for 6 weeks induced a significant reduction in blood glucose and glycosylated hemoglobin concentrations, and it improved hyperinsulinemia compared to the diabetic control db/db mice. The glucokinase activity in the hepatic glucose metabolism increased in the SCE-supplemented db/db mice, while phosphoenolpyruvate carboxykinase and glucose-6-phosphatase activities in the SCE-supplemented db/db mice were significantly lower than those in the diabetic control db/db mice. The homeostatic index of insulin resistance was lower in the SCE-supplemented db/db mice than in the diabetic control db/db mice. CONCLUSIONS: These results suggest that a supplement of the SCE lowers the blood glucose concentration by altering the hepatic glucose metabolic enzyme activities and improves insulin resistance.