• Title/Summary/Keyword: Old-rat

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일측성선조체의 6-OHDA손상 후 도파민효능약물 투여로 발현된 회전운동의 특성

  • 이순철;문민선
    • Journal of Ginseng Research
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    • v.21 no.1
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    • pp.61-67
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    • 1997
  • The present study examined the characteristics of behavior Induced by dopamine agonists following treatment with 6-hydroxydopamine(6-OHDA) unilaterally into left striatum in rats. 6-OHDA was administered at doses of 8,16 and 24 $\mu\textrm{g}$/$\mu\textrm{l}$(in 0.1% ascorbic acid) into dopaminergic neurons in left striatum of 7 weeks old rat under anesthetic. Locomotor activity was significantly decreased at 1 week following 6-OHDA-administration in 7 weeks old rats. The contralateral circling behavior was induced by apomorphine(5 mg/kg, i.v.) after 1 week following 6-OHDA(24$\mu\textrm{g}$/$\mu\textrm{l}$) treatment, and was further increased by repeated administration of apomorphine at 2, 3 and 4 weeks. The contralateral circling behavior was also induced by lisuride and 1-dopa in a dose dependent manner, but not by SK & F 82526 in 7 weeks old rats treated with 6-OHDA. The contralateral circling behavior was significantly higher in 21 weeks old rats but significantly lower In 35 weeks old rats when compared with 7 weeks old rats. The contralateral circling behavior induced by apomorphlne did not differ significantly in 7 and 35 weeks old male and female rats. These results suggest that 6-OHDA treatment into left striatum causes remarkable destrurtion of intrastriatal dopaminergic netcons leading to dopaminergic receptor supersensitivity. Thus, the contralateral circling behavior in duces by apomorphine may be used as indicator for neurodegenerative diseases.

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An Ultrastructural Study on the Renal Glomeruli of the Aging Rat (연령에 따른 흰쥐 신사구체의 변화에 대한 전자현미경적 연구)

  • Yang, Nam-Gil;Han, Jong-Won;Ahn, Eui-Tae;Ko, Jeong-Sik;Park, Kyung-Ho
    • Applied Microscopy
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    • v.17 no.1
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    • pp.47-64
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    • 1987
  • Morphological difference of the renal glomerulus at different age groups have been studied in young (three month-old), adult (twelve month-old) and old (thirty month-old) Fisher strain 344 rats. Pieces of the tissues were taken from renal corticies prefixed with 2.5% glutaraldehyde-1.5% paraformaldehyde (0.1 M Millonig's phosphate buffer, pH 7.3), following by post-fixation with 1% osmium tetroxide (0.1 M Millonig's phosphate buffer, pH 7.3) and embedded within Araldite. The ultrathin sections contrasted with uranyl acetate and lead citrate were observed under a JEM 100CX electron microscope. The mean thickness of glomerular basal lamina and Bowman's capsule were determined by measuring the thinnest portion of basal lamina, and by taking the average of 50 readings from electron micrographs at different ages. The numerical changes of the slit pores were compared based upon the numbers over the length of 10um of glomerular basal lamina. The results were as follow: 1. The thickness of glomerular basal lamina is increased during aging; 140.4 nm in young rats, 270.0 nm in adult ones, and 437.8 nm in old ones. 2. The thickness of basal lamina of parietal cells of Bowman's capsule is 187.5 nm in young rats, 914.0 nm in adult ones, and 2850.0 nm in old ones. 3. The numbers of the slit pores of basal lamina are reduced during aging, 30.3 slit pores/$10{\mu}m$ in adult ones, and 24.2 slit pores/$10{\mu}m$ in old ones. 4. Accumulation of dense intracytoplasmic filamentous material in the parietal cells of Bowman's capsule is increased in the vicinity of the basal lamina during aging. The proximal tubule-like epithelial cell in Bowman's capsule is observed at one glomerulus in a young rat. 5. The endothelial cells are edematous and form balloon-like structure protruding into capillary lumen in young and old rats. 6. Cytoplasm of the podocyte shows a variety of alteration during aging, such as swelling of mitochondria and of endoplasmic reticulum, and increase of microtubules, microfilaments, lysosomes and lamellated myelin structures, etc. Accumulation of dense intracytoplasmic material in the foot processes is increased in the vicinity of the basal lamina during aging. The podocytic membrane-like structures are seen in young and o]d rats. 7. The mesangial matrices and mesangial cells are increased during aging, and slight swelling of endoplasmic reticulum and Golgi cisternae in young and old rats.

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The Antidiabetic Effect of Gamiyookmijihwangtang on Diabetes-prone BB Rats (Diabetes-prone BB Rat을 이용한 가미육미지황탕의 항당뇨 효과)

  • Lee, Yoon-Gyeong;Kim, Soon-Dong
    • Korean Journal of Food Science and Technology
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    • v.32 no.5
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    • pp.1206-1212
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    • 2000
  • This study was conducted to know whether Gamiyookmijihwangtang(GY) which is Yookmijihwang added with Liriopis tuber, Anemarrhenae rhizoma and Phellodendri cortex can remedy the overt diabetes in diabetes-prone BB(BBDP) rats. The rats were given GY through the mother from the fetal stage until birth. After birth they received GY through breast feeding until 20 days old. From 21 days old which is the beginning of the weaning period 60 BB rats(30 males and 30 females) were divided into 2 experimental groups(BBDP and BBDP-GY) and placed individually in metabolic cages. BBDP was the control group which didn't receive any GY and BBDP-GY received 16 mL/㎏ B.W./day of GY until 120 days old. The antidiabetic effects of GY were characterized by the clinical features such as polyurea, polydipsia, hyperglycaemia and the rapid loss of body weight. Body weight, water consumption, urine volume and blood glucose level showed no signs of impending diabetes but after onset there were big changes in those parameters. The onset of diabetes was delayed and the incidence of diabetes was also much decreased with GY but after onset there were no beneficial effects from it.

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The Effect of Korean Red Ginseng Water-extract on Aging-related Changes in the Xenobiotic Metabolizing Enzyme System in the Liver of Rats (홍삼의 물추출물이 노화에 따른 흰쥐 간의 이물질대사 효소계에 미치는 영향)

  • Lee, Dong-Wook;Lim, Heung-Bin
    • Korean Journal of Medicinal Crop Science
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    • v.14 no.6
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    • pp.329-335
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    • 2006
  • The present study was designed to investigate aging-related effects on the activities of xenobiotic metabolizing enzymes of rat liver by dietary supplementation of Korean red ginseng water-extract. Rat did not show any discernible signs of the rejection symptoms, and blood GOT and GPT levels were not influenced by ginseng water extracts, Cytochrome 450 levels and NADPH cytochrome P45O reductase, p-450 dependent ethoxycoumarin O-deethylase, and benzphetamine N-demethylase activities were decreased with aging, however, these phase I system enzymes activities in the ginseng group of24 months were well maintained compared with normal group. But, Levels of cytochrome bs and NADH-cytochrome b$_5$ reductase activities were also decreased with aging and were not found a clear difference between two groups. Glutathione-s-transferase activity, phase II enzyme system, in liver cytosols was also decreased in old ages, but the degree of decrease was higher in normal group than in giuseng supplemented group. These results indicate that long-term supplementation of red ginseng water extracts from weaning to 24 months do not show any side effects to rats, and retard age-related deteriorations of xenobiotic metabolizing enzymes activities in old ages.

The Effects of Somatotropin Passive Immunization on Milk Yield, Plasma Hormone and Metabolite Concentrations in Rats

  • Sun, S.S.;Jang, K.;Kuk, K.;Myung, K.H.;Choi, Y.J.
    • Asian-Australasian Journal of Animal Sciences
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    • v.10 no.3
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    • pp.324-328
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    • 1997
  • The objectives of this study were to measure growth rate and endocrine changes and to improve milk production by somatostatin passive immunization in rat. Experimental animals were 10 weeks old 20 Sprague-Dawley rats. The rats were randomly assigned each 10 in control (normal sheep serum injected: NSS) and treatment (anti-somatostatin injected), and pre-fed for 2 weeks. Anti-somatostatin was purified from serum of 1 year old sheep after somatostatin active immunization, and was injected daily to rats, and growth rate and milk yield were measured for 14 days. Growth rate of litters was 2.15 g/d and 2.32 g/d in NSS and anti-somatostatin injected, respectively. Milk production was increased 6.2% in day 8 and 6.5% in day 12 by anti-somatostatin injection. Plasma growth hormone, insulin, glucose, and urea-N were increased, but non-esterified fatty acid was decreased by anti-somatostatin injection. In summary, passive immunization of somatostatin improved growth rate of litters and milk production in rats.

Effect of Crude Saponin Fraction from Korean Red Ginseng on Physiological Functions of Old Female Rat (고려홍삼 조사포닌 분획이 노령 암컷 흰쥐의 생리적 기능에 미치는 영향)

  • 곽이성;위재준;황석연;경종수;김시관
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.29 no.3
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    • pp.460-465
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    • 2000
  • 본 연구는 여성 갱년기장애에 대한 홍삼의 효과를 조사할 목적으로 수행하였다. 홍삼의 효과는 자연적으로 갱년기 장애가 유도되었다고 생각되는 자성 노령흰쥐를 사용하여 홍삼 조사포닌 분획을 투여(20mg/kg,b.w./day) 한 후 그 효괴를 조사하였다. 홍삼조사포닌 분획은 노령쥐의 체지방 축적으로 야기되는 체중 증가를 다소 감소시키는 것으로 관찰되었다. (p<0.01). 노령쥐는 젊은 쥐에 비해 혈중 당, 총콜레스테롤, BUN 함량이 증가하였는데 조사포닌 분획의 투여는 혈당, 총콜레스테롤 함량 및 BUN 함량증기를 유의하게 억제하는 것으로 나타났다. (p<0.05, p<0.01). 노령쥐는 노령화에 따른 간기능의 저하로 GOT 및 GPT 활성이 증가하였으나 사포닌의 투여는 GOT 및 GPT 활성증가를 억제하여 간기능을 젊은 쥐의 수준으로 회복시킴을 알 수 있었다. (p<0.01). 노령쥐의 대퇴골은 사포닌투여와 관계없이 현저한 무게차이가 관찰되자 않았으나 대퇴골중 무기이온 Na+ 함량은 사포닌 투여시 약 2배 증가하는 것으로 나타났다. 이러한 사실로부터 홍삼 조사포닌 분획은 노령쥐의 혈당, 총콜레스테롤, BUN 함량증가를 억제하는 효과를 나타내며 또한 노령화에 따른 간기능 관련 생화학 지수를 개선하는 것으로 사료된다.

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In vitro, Percutaneous absorption for Rat about cysteine (In vitro에서 시스테인에 대한 흰쥐의 경피 흡수)

  • Jung, Duck-Chae;Oh, Eun-Ha;Kuk, Won-Kwen
    • Journal of the Korean Applied Science and Technology
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    • v.25 no.2
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    • pp.137-143
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    • 2008
  • Chemicals for cosmetics, including skin, the skin absorbs some of the research in the field of science or pharmacy recently, about the environment and the health of the heightened interest in skin absorption, and many other human attributes and absorption evaluation studies are underway in various areas. In this study, The effects of commercial permanent wave products to skin which are composed with cysteine and bases using rat. Results are as follows; the content of penetration 4 hours later with steady state and no significant changeable after 20 hours later. In cysteine groups lag time and permeability coefficient of young skin is 3.32hr and $0.102{\mu}g/cm^2{\cdot}hr$, lag time and permeability coefficient of old skin is 4.04hr and $0.106{\mu}g/cm^2{\cdot}hr$. In conclusion of study lag time and permeability coefficient in old skin and wounded skin are faster than healthy skin. We notified that fine rinkle and rash of skin were changeable in the case of treating with permanent wave drugs than normal skin.

Dietary effects of melatonin on growth performance by modulation of protein bioavailability and behavior in early weaned rats and pigs

  • Min-Jin Kwak;Kyeong Su Chae;Jong Nam Kim;Kwang-Youn Whang;Younghoon Kim
    • Journal of Animal Science and Technology
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    • v.65 no.5
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    • pp.1053-1064
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    • 2023
  • Melatonin, which is produced from tryptophan, exerts various biological functions, including the regulation of circadian rhythm, sedative agents, and antioxidant ability. Therefore, we conducted two experiments with early-weaned rats and pigs to investigate the antioxidant and sedative effects of melatonin. In the rat experiment, a total of 42 rats (21 days old) were used, and the antioxidant capacity was determined. Next, we used 120 early-weaned piglets (21 days old) to conduct a 5-week experiment to evaluate the reductive effect of melatonin on energy-wasting movement, including roaming and fight states. Dietary melatonin supplementation significantly improved growth in both rats and pigs compared to the control groups. Additionally, rats fed a melatonin-supplemented diet showed advanced antioxidant capacity with a decrease in hepatic malondialdehyde concentration compared to rats fed a basal diet. Moreover, dietary melatonin ingestion increased resting and feeding behaviors and reduced roaming and fight behaviors during Days 8-21 compared to the control diet group. Collectively, early weaned animals given dietary melatonin supplementation showed improved growth through upregulation of hepatic antioxidant capacity and minimization of energy-wasting behavior, including roaming and fight states, after pigs' social hierarchy establishment.

The Anti-oxidative and Immune-regulatory Effect of Chungsimyeonja-tang in Aged Rat (태음인(太陰人) 청심연자탕(淸心蓮子湯)이 SD rat 의 항산화(抗酸化) 및 면역조절효과(免疫調節效果)에 대한 실험적 연구)

  • Lim, Jong-Pil;Ahn, Taek-Won
    • Journal of Sasang Constitutional Medicine
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    • v.19 no.3
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    • pp.227-241
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    • 2007
  • 1. Objectives The purpose of this study is to investigate the anti-oxidative and immune regulatory effect of oral administration of Chungsimyeonja-tang decoction in aged rats. 2. Methods The rats in the normal group were 14 weeks old, and those in the control and Chungsimyeonja-tang groups were 40 weeks old. The rats in Chungsimyeonja-tang group were orally treated with chungsimyeonjatang decoction daily for 2 months. To observe the anti-oxidative effect and immune regulatory effect of Chungsimyeonja-tang, we performed blood chemistry analysis, histological analysis. 3. Results and Conclusions 1) The number of WBC in blood was significantly increased and the number of PLT in blood was significantly decreased by oral administration of Chungsimyeonja-tang decoction. 2) The levels of albumin, LDL cholesterol, ALP and GOT in serum were significantly decreased, and the level of glucose in serum was significantly increased by oral administration of Chungsimyeonja-tang decoction. 3) The concentrations of glutathione and catalase were significantly increased and the concentrations of NO and MDA were significantly decreased in the liver of early aged rats by oral administration of Chungsimyeonja-tang decoction. 4) The concentrations of SOD and catalase were significantly increased and the concentration of MDA was significantly decreased in the lung of aged rats by oral administration of Chungsimyeonja-tang decoction. 5) The levels of IL-4 and IL-6 were significantly decreased while the levels of IFN-${\gamma}$ were significantly increased in the spleen of early aged rats by oral administration of Chungsimyeonja-tang decoction.

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The Optimum Conditions for the Simultaneous Determination of Neurotransmitters in Rat Brain Striatum by High Performance Liquid Chromatography with Electrochemical Detection (HPLC-ECD를 이용한 흰쥐 뇌의 선조체 중 신경전달물질의 동시분석시 최적 조건)

  • Kang, Jong-Seong;Mun, Min-Seon;Shin, Hyung-Seon;Lee, Soon-Chul
    • Analytical Science and Technology
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    • v.8 no.2
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    • pp.215-220
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    • 1995
  • A simple, efficient and sensitive method was described for the simultaneous determination of catecholamine, indoleamine and related metabolites from the homogenates of the rat brain striatum by HPLC-ECD. The optimum mobile phase on a reverse phase $C_{18}$ column was 35mM sodium acetate buffer(included 10mM citric acid, 0.13mM $Na_4EDTA$, 0.58mM SOS, pH3-4):MeOH=85:15. The column temperature was $30^{\circ}C$. Dopamine(DA), 3, 4-dihydroxyphenyl acetic acid(DOPAC), homovanilic acid(HVA), 5-hydroxyindole acetic acid(5-HIAA), serotonin(5-HT) and noradrenaline(NA) could be separated and analysed to very small amount. The detection limits of this method were 2~10pg per injection for all components. The effects of age and sex of rat on the contents of the catecholamines and their metabolites in rat brain striatum were studied. The levels of DA and 5-HT contents of the 7 week old female rats were higher than those of the 7 week old male rats. As the age of rat increases, the contents of DOPAC increased significantly.

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