• Title, Summary, Keyword: rat heart

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carbofuran Induces Cardiovascular Dysfunction in Rat (휜쥐의 심혈관 기능에 대한 carbofuran독성작용)

  • 정이숙;이수환;백은주;문창규;문창현
    • YAKHAK HOEJI
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    • v.45 no.6
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    • pp.739-745
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    • 2001
  • Of all pesticides, carbamates are known to be most common, since alternatives such as organophosphates have long lifetime and are extremely toxic to produce a delayed neurotoxic effect. Although a number of studies about toxicity of carbofuran, a most widely used carbamate, have been reported, its cardiovascular toxicity has not yet been studied. In the present study, we investigated its cardiovascular toxic effect in anesthetized rat in vivo and in isolated Langendorff rat heart, In anesthetized rat model, carbofuran (10 mg/kg) significantly reduced heart rate, and transiently increased blood pressure. In isolated rat heart, carbofuran (10${\mu}{\textrm}{m}$) caused a significant depression in the left ventricular developed pressure (LVDP), indicating contractile dysfunction by carbofuran. Carbofuran (10${\mu}{\textrm}{m}$) also decreased coronary flow rate (CFR) in isolated heart, indicating carbofuran-induced coronary dysfunction. These results suggest that carbofuran can cause cardiac dysfunction in rat in vivo and vitro.

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The Effect of Ginseng on $Ca^{++}-dependent$ ATPase Activity of Sarcoplasmic Reticulum Fragments in Rat Heart (백서(白鼠)에 인삼(人蔘) 투여시(投與時) 심근(心筋) 소포체(小胞體)의 $Ca^{++}-dependent$ ATPase활성(活性)에 미치는 효과(效果))

  • Lee, Young-Sook;Kim, Nak-Doo
    • Korean Journal of Pharmacognosy
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    • v.15 no.1
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    • pp.24-29
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    • 1984
  • It was previously reported from our laboratory that the rate of deterioration of contractile force was slower in the heart of the ginseng extract treated rats. It was also found that ginseng may have an ability to sustain the normal function of the heart by sustaining Ca accumulation by sarcoplasmic reticulum. $Ca^{++}-dependent$ ATPase plays the central role in movement of $Ca^{++}$ ion from sarcoplasm into sarcoplasmic reticulum. In this investigation, the fragment of sarcoplasmic reticulum was prepared from rat heart treated with ginseng water extract orally 100mg/kg/day for 7 to 10 days and from normal rat heart. $Ca^{++}-dependent$ APTase activity was estimated by a modified method of Fiske and Subbarow's procedure. Experimental groups were divided into 6 groups, depending on the preincubation time, 5, 30 and 60min. at ${25}^{\circ}C$ and ${37}^{\circ}C$ respectively. In both of the groups of ${25}^{\circ}C$ and ${37}^{\circ}C$, $Ca^{++}-dependent$ ATPase activities of the ginseng treated rat hearts were higher than that of normal hearts. Therefore, it can be concluded that $Ca^{++}-dependent$ ATPase activities in sarcoplasmic reticulum of rat hearts were increased by the treatment with ginseng extract.

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Effects of Yeonryunggobondan and Palmijihwangtang on the Population Doubling Number and the Population Time in Rat Fibroblasts, Heart-Endothelial Cells, Mesangial Cells (연령고본단 및 팔미지황탕이 Rat의 피부섬유아세포, 사구체 메산지움세포 및 혈관내피세포의 노화 지연에 미치는 영향)

  • 박영준;안영민;안세영;두호경
    • The Journal of Korean Medicine
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    • v.25 no.1
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    • pp.49-59
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    • 2004
  • Objectives: This paper is to investigate what effects Yeonryunggobondan and Palmijihwangtang have on postponing senility in rat fibroblasts, heart-endothelial cells, mesangial cells. Methods: 1. In vitro Yeonryunggobondan and Palmijihwangtang controlled the growth of fibroblasts, heart-endothelial cells, mesangial cells, extended the PDT of them. 2. After feeding rats the drugs for 2 months, the fibroblasts, heart-endothelial cells, mesangial cells were cultured. Results: 1) In fibroblasts the PDN was incresed and the PDT was decreased at passage-1, 2 by Yeonryunggobondan and Palmijihwangtang(p<0.05). 2) In heart-endothelial cells the PDN was incresed and the PDT was decreased at passage 8 by Yeonryunggobondan and Palmijihwangtang(p<0.05). 3) In mesangial cells the PDN was increased and the PDT was decreased at passage 4 by Yeonryunggobondan, the PDN was incresed at passage 4 by Palmijihwangtang(p<0.05). Conclusions: It is concluded that both Yeonryunggobondan and Palmijihwangtang maybe be conductive to protect and delay the senescence of rat fibroblasts, heart-endothelial cells, mesangial cells.

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Protective Roles of Ginseng Saponin in Cardiac Ischemia and Reperfusion Injury

  • Kim, Jong-Hoon
    • Journal of Ginseng Research
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    • v.33 no.4
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    • pp.283-293
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    • 2009
  • Ginsenosides, one of the most well-known traditional herbal medicines, are used frequently in Korea for the treatment of cardiovascular symptoms. The effects of ginseng saponin on ischemia-induced isolated rat heart were investigated through analyses of hemodynamic changes including perfusion pressure, aortic flow, coronary flow, and cardiac output. Isolated rat hearts were perfused and then subjected to 30 min of global ischemia followed by 60 min of reperfusion with modified Kreb's Henseleit solution. Myocardial contractile function was continuously recorded. Ginseng saponin administered before inducing ischemia significantly prevented decreases in perfusion pressure, aortic flow, coronary flow, and cardiac output. The ginseng saponin administered group significantly recovered all of the hemodynamic parameters, except heart rate, after ischemia-reperfusion (I/R) compared with ischemia control. The intracellular calcium ($[Ca^{2+}]_i$) content in rat neonatal cardiomyocytes was quantitatively determined. Administration of ginseng saponin significantly prevented $[Ca^{2+}]_i$ increase that had been induced by simulated I/R in vitro (p<0.01) in a dose-dependent manner, suggesting that the cardioprotection of ginseng saponin is mediated by the inhibition of $[Ca^{2+}]_i$ increase. Overall, we found that the administration of ginseng saponin has cardioprotective effects on the isolated rat heart after I/R injury. These results indicate that ginseng saponin has distinct cardioprotective effects in an I/R-induced rat heart.

Study on the Changes of Calcuim Contents in the Rat Heart Treated with Ginseng (인삼을 경구투여한 흰쥐 심장내 Calcium 함량의 변동에 관한 연구)

  • 김영미;김낙두
    • YAKHAK HOEJI
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    • v.31 no.3
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    • pp.140-148
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    • 1987
  • The effects of orally administered ginseng ethanol extract on the calcium release from sarcoplasmic reticulum (SR) calcium pool and on the calcium content in the rat heart perfused with the Langendorff apparatus. The total amount of calcium released from SR calcium pool and the total calcium content in the rat heart were significantly decreased by 43% and 26%, respectively compared with the control.

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The Influence of Sodium Fluoride on the Release of Catecholamine from Perfused Organs and Monoamine Oxidase Activity (Fluoride가 적출장기(摘出臟器)의 Catecholamine 유리(遊離) 및 Monoamine Oxidase 활성도(活性度)에 미치는 영향(影響))

  • Cheon, Yun-Sook;Kim, Sung-Sook;Lee, Kyung-Hee;Shin, Kyung-Chul
    • The Korean Journal of Pharmacology
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    • v.8 no.2
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    • pp.41-47
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    • 1972
  • Fluorides were supposed to exert a stimulatory action on the catecholamine release. In this study, the authors attempted to investigate the action of sodium fluoride on the catecholamine release from the isolated perfused cow adrenal gland and rat heart. And also the inhibitory effect of sodium fluoride on the monoamine oxidase activity in rat heart and liver mitochondria was investigated. The monoamine oxidase activity was measured by the conversion of benzylamine to benzaldehyde. The results obtained were follows; 1. Sodium fluoride stimulated the release of catecholamine from the isolated perfused cow adrenal gland and rat heart. 2. Sodium fluoride inhibited the rat heart and liver mitochondrial monoamine oxidase activity.

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Effect of Ginseng Components on the Potassium Depleted Cardiomyopathic Rats and it's Mechanism of Action

  • Lee, Jong-Wook;Kim, Nak-Doo
    • Archives of Pharmacal Research
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    • v.8 no.2
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    • pp.49-57
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    • 1985
  • The effect of ginseng components on the potassium depleted cardiomyopathic rat heart was investigated. In the perfused heart experiment using Langendorff apparatus, the deterioration rate of contriactile force of potassium depleted rat heart (low potassium diet group) was faster than that of normal rat heart and ginseng components showed the ability to slow the deterioration rate of potassium depleted hearts. Both sialic acid contents in carcolemmal ghost and sialyltransferase activity of 40,000 * g subcellular fraction prepared from cardiac ventricular tissue of low potassium diet group were significantly decreased compared to those of normal group. The decrease of the sialic acid content and sialyltransferase activity in sarcolemma of low potassium diet group was inhibited when ginseng was concomitantly administered. Calcium uptake of sarcoplasmic reticulum prepared from low potassium diet group was significantly greaterthan that of normal group. Ginseng extract or total saponin showed the tendency to inhibit the increase of cacium uptake.

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Anti-ischemic Effect of Polygala Tenuifolia in Isolated Rat Heart

  • Kang, Chang-Won;Kim, Jong-Hoon
    • The Korean Journal of Physiology and Pharmacology
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    • v.11 no.3
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    • pp.89-95
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    • 2007
  • Polygala tenuifolia (PT) is one of the most well-known traditional herbal medicines in Korea which is commonly used for the treatment of cardiovascular symptoms. The anti-ischemic effects of PT in isolated rat heart was investigated by analyzing changes in blood pressure, aortic flow, coronary flow, and cardiac output. And, its underlying mechanism was examined by quantitating intracellular calcium content in rat neonatal cardiomyocytes. Rats were divided into two groups: an ischemia-induced group without any treatment, and an ischemia-induced group treated with PT. Ischemia of isolated heart was induced by stopping the supply of oxygen and buffer for 10 min. The isolated heart was exposed to PT for the first 5 min of 10 min ischemia. PT treatment significantly prevented the decreases of perfusion pressure, aortic flow, coronary flow, and cardiac output under ischemic conditions. In addition, hemodynamics (except heart rate) of the PT-treated group was significantly recovered 60 min after reperfusion compared to the control group (systolic aortic pressure: 83.3% vs. 64.9%, aortic flow volume: 69.5% vs. 48.7%, coronary flow volume: 77.7% vs. 58.4%, and cardiac output: 71.6% vs. 51.2%, p < 0.01). As for the underlying mechanism, PT significantly prevented intracellular calcium increase which was induced by isoproterenol (p < 0.01), suggesting that the anti-ischemic effect of PT is mediated by inhibition of intracellular calcium increase.

Effects of Ginseng on Global Myocardial Ischemia and Reperfusion in the Rat Heart (허혈 및 재관류한 흰쥐 심장에 미치는 인삼의 영향)

  • Kim, Byung-Chae;Kim, Nak-Doo
    • YAKHAK HOEJI
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    • v.32 no.1
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    • pp.70-79
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    • 1988
  • The effect of Ginseng on global myocardial ischemia and reperfusion was examined in isolated perfused rat hearts. The Ginseng ethanol extract (100mg/kg/day) was administered orally for 10 days. The rat hearts were removed and perfused at 75cm $H_{2}O$ by the Langendorff method. After 25 min. of global ischemia, the hearts were reperfused. The myocardial contents of adenosine 5'-triphosphate, creatine phosphate, and calcium were assayed. There no differences in ATP levels in all group of normal and Ginseng-treated hearts. Both in non-ischemic and ischemic heart, Ginseng increased significantly tissue creatine phosphate levels compared with control. Whereas, in ischemic-reperfused heart, there was no significant difference. In the control groups, myocardial calcium contents in the ischemic hearts were decreased compared with the non-ischemic hearts. But, in the Ginseng-treated groups, the calcium contents in the ischemic herts were not changed with the nonischemic hearts. Therefore, Ginseng appears to exert its protective effect against ischemic heart condition, not against ischemic-reperfused heart condition, by regulating energy metabolism and maintaing cellular function.

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Effect of ischemic preconditioning on left ventricular function after cardiac arrest in isoated rat heart (적출 쥐 심장에서 허혈성 전조건화가 심정지후 좌심실 기능에 미치는 영향)

  • 조대윤
    • The Korean Journal of Thoracic and Cardiovascular Surgery
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    • v.27 no.7
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    • pp.563-570
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    • 1994
  • Effect of ischemic preconditioning on left ventricular function after cardiac arrest in isolated rat heart.Ischemic preconditioning reduces infarct size caused by sustained ischemia. However, the effects of preconditioning on post ischemic cardiac function are not well-known. The objective of the present study was to determine whether preconditioning would improve the recovery of left ventricular functions after cardiac arrest in isolated rat heart model.Isolated rat hearts were allowed to equilibrate for 20 minutes and were then subjected to either 5 minutes of global, normothermic transient ischemia [Group 2 and 4] or not [Group 3]. A stabilization period of perfusion lasting 5 minutes after the termination of transient ischemia was followed by a standard global, normothermic 20 minute-ischemia and 35-minute reperfusion challenge [Group 3 and 4]. These following results were odtained.1. The recovery of left ventricular developed pressures showed no significant differences between Group 3 and Group 4 at 50 [P>0.3] and 85 minute [P>0.2].2. Heart rates showed no significant differences throughout all the course of experiment and between groups [P>0.5].3. The recovery of left ventricular maximum dP/dt showed no significant differences between Group 3 and Group 4 at 50 [P>0.1] and 85 minute [P>0.2].4. The recovery of pressure-rate products showed no significant differences between Group3 and Group 4 at 50 [P>0.5] and 85 minute [P>0.1].These results suggest that ischemic preconditioning does not provide significant benefit for the postischemic left ventricular functions in isolated rat hearts.

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