• 대한본초학회지
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• 제32권1호
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• pp.25-31
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• 2017

Objectives : Mori Radicis Cortex (MRC), the root epidermis of Morus alba L., has been traditionally used to treat lung-related diseases in Korean Medicine. The common of MRC is Mulberry bark Morus bark, and it's pharmaceutical properties and taste are known as sweet and cold, and it promotes urination and reduce edema by reducing heat from the lungs and soothe asthma. In the present study, anti-apoptotic mechanism of MRC in middle cerebral artery occlusion (MCAO) model in mice. Methods : Two-hundred grams of MRC was extracted with methanol at room temperature for 5 days, and this was repeated one time. After filtration, the methanol was removed using vacuum evaporator, then stored at $-20^{\circ}C$ until use. C57BL/6 male mice were housed in an environment with controlled humidity, temperature, and light cycle. In order to determine beneficial effects of MRC on ischemia induced brain damage, infarct volume, neurological deficit scores, activities of several apoptosis-related proteins such as caspase-8, -9, Bcl-xL in MCAO-induced brains of mice were analyzed. Mice in MRC-treated groups were orally administered 30, 100, or 300 mg/kg of body weight for three consecutive days before commencing the MCAO procedure. Results : Pre-treatment of MRC significantly reduced infarct volume in MCAO subjected mice applied with 300 mg/kg of MRC methanol extract, and MRC effectively inhibited Bcl-xL reduction and caspase-9 activation caused by MCAO-induced brain damage. Conclusions : MRC showed neuro-protective effects by regulating apoptosis-related protein signals, and it can be a potential candidate for the therapy of ischemia-induced brain damage.

• 한방재활의학과학회지
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• 제27권2호
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• pp.19-27
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• 2017

Objectives Osteoporosis is a common disease in adults with prevalence rate of more than 40%, and occurs more to female than to male. The purpose of this study is to identify the effect of Bia-hwan ($F{\acute{e}}i{\acute{e}}r$-$w{\acute{a}}n$) on the osteoporosis of ovariectomized rats. Methods 24 female rats were randomly assigned to a SHAM group, a control group, and a BAH group. Ovaries of the control group and the BAH group were extracted. After than, general animal feed were given to the SHAM group and the control group, animal feed contained BAH were given to the BAH group through mouths of them. After 8 weeks, rats were sacrificed and their weight, calcium, phosphorus, estradiol, total-cholesterol, triglyceride, ALP, albumin, AST, ALT, the weight of femur and tibia ash per body ratio, both area and thickness of trabecular bone, the area of osteoblast and the number of osteoclast were measured. Results The level of calcium, phosphorus, AST in the serum of the BAH group increased significantly compared to the control group. There was no significant difference between the control group and the BAH group in the level of estradiol, total-cholesterol, triglyceride, ALP, albumin, and ALT in the serum. There was no significant difference between the control group and the BAH group in the weight of femur and tibia ash per body ratio. The thickness of trabecular of the BAH group increased significantly compared to the control group, but there was no significant difference in the trabecular area. The area of osteoblast and the number of osteoclast of the BAH group decreased significantly compared to the control group. Conclusions From the results of the above study, oral intake of BAH can inhibit the decrease of calcium, phosphorus in blood and prevent the thinning process of the trabecular by suppressing activation of osteoclast. Thus, BAH may have effects on the treatment and prevention of osteoporosis.

• Journal of Ginseng Research
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• 제39권4호
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• pp.398-405
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• 2015

Background: Ginseng has been used as a tonic for invigoration of the human body. In a previous report, we identified a novel candidate responsible for the tonic role of ginseng, designated gintonin. Gintonin induces $[Ca^{2+}]_i$ transient in animal cells via lysophosphatidic acid receptor activation. Gintonin-mediated $[Ca^{2+}]_i$ transient is linked to anti-Alzheimer's activity in transgenic Alzheimer's disease animal model. The previous method for gintonin preparation included multiple steps. The aim of this study is to develop a simple method of gintonin fraction with a high yield. Methods: We developed a brief method to obtain gintonin using ethanol and water. We extracted ginseng with fermentation ethanol and fractionated the extract with water to obtain water-soluble and water-insoluble fractions. The water-insoluble precipitate, rather than the water-soluble supernatant, induced a large $[Ca^{2+}]_i$ transient in primary astrocytes. We designated this fraction as gintonin-enriched fraction (GEF). Results: The yield of GEF was approximately 6-fold higher than that obtained in the previous gintonin preparation method. The apparent molecular weight of GEF, determined using sodium dodecyl sulfate-polyacrylamide gel electrophoresis, was equivalent to that obtained in the previous gintonin preparation method. GEF induced $[Ca^{2+}]_i$ transient in cortical astrocytes. The effective dose (ED50) was $0.3{\pm}0.09{\mu}g/mL$. GEF used the same signal transduction pathway as gintonin during $[Ca^{2+}]_i$ transient induction in mouse cortical astrocytes. Conclusion: Because GEF can be prepared through water precipitation of ginseng ethanol extract and is easily reproducible with high yield, it could be commercially utilized for the development of gintoninderived functional health food and natural medicine.

• 디지털융복합연구
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• 제18권4호
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• pp.121-127
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• 2020

지역 산업의 혁신과 공공서비스의 발전을 위해서는 무엇보다 지역상생 개념을 적용한 동반 성장이 필요하다. 지역상생은 본질적으로 지역 간 균형 또는 지역 간 격차를 해소하기 위한 것으로, 상호보완적 협력을 통해 동반 성장을 할 수 있는 관계를 의미한다. 본 연구에서는 지역혁신 차원의 산학협력 현황을 중심으로 리빙랩을 활용한 사례를 도출하고 이의 정책적 함의를 모색하였다. 지방자치단체는 자율적으로 상생협력을 통해 지역의 문제를 해결하고 상호 경쟁력 확보 차원의 연계 효과를 제고 하기 위한 다각적인 시도가 이어지고 있다. 특히 지역의 현안을 중심으로 문제해결 기제인 리빙랩 네트워크를 활성화하여 실효성 있는 접근이 이어지고 있다. 무엇보다 지역의 발전을 위한 전략 중 하나로 상생 협력을 위한 협력체제 구축과 이를 지원하기 위한 정책 수단이 연계되어야 한다. 지역의 대학과 기업 및 지자체가 함께 하는 협력 프로그램의 활성화와 리빙랩을 활용한 문제해결 사례는 그 의의가 크다고 평가받고 있다. 따라서 리빙랩의 활성화를 위해 다양한 이해관계자의 적극적 참여와 협력적 거버넌스 모델이 필요함을 제시하였다.

• 대한화학회지
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• 제18권4호
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• pp.223-238
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• 1974

염화포름산 알킬의 할로겐화 이온 교환반응을 반응속도론적으로 연구하고, 이의 전자 구조적 특성을 CNDO/2 MO계산으로 연구하였으며 이로부터 구조와 반응성 간의 관계를 논의하였다. 염화포름산 알킬의 에너지면에서의 가장 안정한 입체배치가 알킬기와 염소원자 사이가 서로 트랜스인 입체배치임을 알았으며, 결합주위의 회전장애가 {\pi}-전자 비편재화에 기인됨을 밝혔다. 염화포름산 알킬은 하전분리가 심한 극성물질이며, 이것이 카르보닐 산소와 알콕시 산소의 효과 및 염소의 효과에 기인됨을 밝혔다. 반응속도에 미치는 용매효과는 $(CH_3)_2CO>CH_3CN{\gg}MeOH$순으로 반응성이 감소되는 작용을 나타냈으며, 친핵성도는 양성자성 용매중에서 $I^->Br^->Cl^-$, 비양자성 용매 중에서 $Cl^->Br^->I^-$이었으며 알킬기의 기여는 $CH_3->C_2H_5->i-C_3H_7-$순이었다. 초기상태와 천이상태의 안정화 기여를 기초로 용매효과를 해석하였으며 초기상태 탈용매화의 특성으로 친핵성도를 논의하였다. 이 반응에 대하여 가장 유리한 메카니즘을 첨가-제거 메카니즘으로 제안하였다. 염화포름산 알킬의 반응성을 결정하는 구조적 요인은 하전, C-Cl 결합에 대하여 ${\alpha}^{\ast}$인 LUMO의 에너지준위 및 이 MO에서 C-Cl결합의 반결합세기임을 밝혔다.

• Journal of Ginseng Research
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• 제35권2호
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• pp.176-190
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• 2011

There seems to be some controversy about the effect of total ginseng saponin (TGS) on the secretion of catecholamines (CA) from the adrenal gland. Therefore, the present study aimed to determine whether TGS can affect the CA release in the perfused model of the adrenal medulla isolated from spontaneously hypertensive rats (SHRs). TGS (15-150 ${\mu}g/mL$), perfused into an adrenal vein for 90 min, inhibited the CA secretory responses evoked by acetylcholine (ACh, 5.32 mM) and high $K^+$ (56 mM, a direct membrane depolarizer) in a dose- and time-dependent fashion. TGS (50 ${\mu}g/mL$) also time-dependently inhibited the CA secretion evoked by 1.1-dimethyl-4 -phenyl piperazinium iodide (DMPP; 100 ${\mu}M$, a selective neuronal nicotinic receptor agonist) and McN-A-343 (100 ${\mu}M$, a selective muscarinic M1 receptor agonist). TGS itself did not affect basal CA secretion (data not shown). Also, in the presence of TGS (50 ${\mu}g/mL$), the secretory responses of CA evoked by veratridine (a selective $Na^+$ channel activator (50 ${\mu}M$), Bay-K-8644 (an L-type dihydropyridine $Ca^{2+}$ channel activator, 10 ${\mu}M$), and cyclopiazonic acid (a cytoplasmic $Ca^{2+}$-ATPase inhibitor, 10 ${\mu}M$) were significantly reduced, respectively. Interestingly, in the simultaneous presence of TGS (50 ${\mu}g/mL$) and N${\omega}$-nitro-L-arginine methyl ester hydrochloride [an inhibitor of nitric oxide (NO) synthase, 30 ${\mu}M$], the inhibitory responses of TGS on the CA secretion evoked by ACh, high $K^+$, DMPP, McN-A-343, Bay-K-8644, cyclopiazonic acid, and veratridine were considerably recovered to the extent of the corresponding control secretion compared with the inhibitory effect of TGS-treatment alone. Practically, the level of NO released from adrenal medulla after the treatment of TGS (150 ${\mu}g/mL$) was greatly elevated compared to the corresponding basal released level. Taken together, these results demonstrate that TGS inhibits the CA secretory responses evoked by stimulation of cholinergic (both muscarinic and nicotinic) receptors as well as by direct membrane-depolarization from the isolated perfused adrenal medulla of the SHRs. It seems that this inhibitory effect of TGS is mediated by inhibiting both the influx of $Ca^{2+}$ and Na+ into the adrenomedullary chromaffin cells and also by suppressing the release of $Ca^{2+}$ from the cytoplasmic calcium store, at least partly through the increased NO production due to the activation of nitric oxide synthase, which is relevant to neuronal nicotinic receptor blockade, without the enhancement effect on the CA release. Based on these effects, it is also thought that there are some species differences in the adrenomedullary CA secretion between the rabbit and SHR.

• Molecules and Cells
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• 제41권8호
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• pp.742-752
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• 2018

Parkinson's disease (PD) is a neurodegenerative disease characterized by progressive degeneration of dopaminergic (DAergic) neurons, particularly in the substantia nigra (SN). Although circadian dysfunction has been suggested as one of the pathophysiological risk factors for PD, the exact molecular link between the circadian clock and PD remains largely unclear. We have recently demonstrated that $REV-ERB{\alpha}$, a circadian nuclear receptor, serves as a key molecular link between the circadian and DAergic systems. It competitively cooperates with NURR1, another nuclear receptor required for the optimal development and function of DA neurons, to control DAergic gene transcription. Considering our previous findings, we hypothesize that $REV-ERB{\alpha}$ may have a role in the onset and/or progression of PD. In the present study, we therefore aimed to elucidate whether genetic abrogation of $REV-ERB{\alpha}$ affects PD-related phenotypes in a mouse model of PD produced by a unilateral injection of 6-hydroxydopamine (6-OHDA) into the dorsal striatum. $REV-ERB{\alpha}$ deficiency significantly exacerbated 6-OHDA-induced motor deficits as well as DAergic neuronal loss in the vertebral midbrain including the SN and the ventral tegmental area. The exacerbated DAergic degeneration likely involves neuroinflammation-mediated neurotoxicity. The $REV-erb{\alpha}$ knockout mice showed prolonged microglial activation in the SN along with the over-production of interleukin $1{\beta}$, a pro-inflammatory cytokine, in response to 6-OHDA. In conclusion, the present study demonstrates for the first time that genetic abrogation of $REV-ERB{\alpha}$ can increase vulnerability of DAergic neurons to neurotoxic insults, such as 6-OHDA, thereby implying that its normal function may be beneficial for maintaining DAergic neuron populations during PD progression.

• Journal of Microbiology
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• 제45권4호
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• pp.305-310
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• 2007

The principal objective of this study was to compare the effects of whole and hydrolyzed cells (bifidobacteria) treated with gastrointestinal digestive enzymes on the activation of cloned macrophages. Seven different strains of Bifidobacterium obtained from swine, chickens, and rats, were digested with pepsin followed by pancreatin and the precipitate (insoluble fraction) and supernatant (soluble fraction) obtained via centrifugation. The RAW 264.7 murine macrophages were incubated with either whole cells, the precipitate, or supernatant at various concentrations. Pronounced increases in the levels of nitric oxide (NO), interleukin $(IL)-1{\beta}$, IL-6, IL-12, and tumor necrosis factor $(TNF)-{\alpha}$ were observed in the whole cells and precipitates, but these effects were less profound in the supernatants. The precipitates also evidenced a slight, but significant, inductive activity for NO and all tested cytokines, with the exception of $(TNF)-{\alpha}$ in the macrophage model as compared with the whole cells. By way of contrast, $(TNF)-{\alpha}$ production when cultured with whole cells (100 ng/ml) resulted in marked increases as compared with what was observed with the precipitates. The results of this study indicated, for the first time, that digested Bifidobacterium sp. can induce the production of NO and several cytokines in RAW 264.7 murine macrophage cells. In the current study, it was demonstrated that Bifidobacterium strains treated with digestive enzymes, as compared with whole cells, are capable of stimulating the induction of macrophage mediators, which reflects that they may be able to modulate the gastrointestinal immune functions of the host.

• 한국지구과학회지
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• 제39권5호
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• pp.501-515
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• 2018

본 연구에서는 지구과학의 탐구 방법으로서 복수 작업가설의 방법을 특정한 구조를 지닌 암석의 형성 과정에 대한 귀추적 추론 과정에 적용하고, 그 속에서 드러난 복수 작업가설의 방법의 특징을 탐색하였다. 연구 참여자는 한교육대학교에서 진행된 수업에 참여한 31명의 4학년 학생들이었으며, 이들은 수업 활동의 일환으로 문제 암석의 형성 과정에 대한 복수의 작업가설을 상정하고 그것들을 함께 고려하여 귀추적 탐구를 수행하였다. 학생들의 추론 과정과 결과를 스케치북 보고서에 기록하게 하고, 보고서의 내용을 분석적 귀납의 원리에 따라 분석하여 4가지 연구 주장을 도출하였다. 첫째, 학생들의 작업가설은 자원 모델을 바탕으로 상정되고 이 과정에서 종종 자원 모델의 변형이 일어난다. 둘째, 자원 모델의 활성화에는 증거의 지각적 특성이 영향을 미친다. 셋째, 관찰한 증거의 종류와 증거에 대한 다른 해석이 작업가설들에 대한 서로 다른 판단을 초래한다. 넷째, 종종 대안적인 가설들이 결합하여 또 다른 가설이 만들어진다. 이러한 연구 결과가 지구과학 교육과 관련 연구에 시사하는 점을 논의하였다.

• The Korean Journal of Physiology and Pharmacology
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• 제5권3호
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• pp.259-270
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• 2001

The present study was attempted to investigate the characteristics of epibatidine on secretion of catecholamines (CA) from the isolated perfused model of the rat adrenal gland, and to establish the mechanism of action. Epibatidine $(3{\times}10^{-8}\;M)$ injected into an adrenal vein produced a great inhibition in secretory response of CA from the perfused rat adrenal gland. However, upon the repeated injection of epibatidine $(3{\times}10^{-8}\;M)$ at 15 min-intervals, CA secretion was rapidly decreased after second injection of epibatidine. However, there was no statistical difference between CA secretory responses of both 1st and 2nd periods by the successive administration of epibatidine at 120 min-intervals. Tachyphylaxis to releasing effects of CA evoked by epibatidine was observed by the repeated administration. Therefore, in all subsequent experiments, epibatidine was not administered successively more than twice only 120 min-intervals. The epibatidine-induced CA secretion was markedly inhibited by the pretreatment with atropine, chlorisondamine, pirenzepine, nicardipine, TMB-8, and perfusion of $Ca^{2+}-free$ Krebs solution containing EGTA, while was not affected by diphenhydramine. Moreover, the CA secretion evoked by ACh for 1st period $(0{\sim}4\;min)$ was greatly potentiated by the simultaneous perfusion of epibatidine $(1.5{\times}10^{-8}\;M),$ but followed by time-dependently gradual reduction after 2nd period. The CA release evoked by high potassium $(5.6{\times}10^{-8}\;M),$ for 1st period $(0{\sim}4\;min)$ was also enhanced by the simultaneous perfusion of epibatidine, but those after 2nd period were not affected. Taken together, these experimental data suggest that epibatidine causes catecholamine secretion in a calcium dependent fashion from the perfused rat adrenal gland through activation of neuronal cholinergic (nicotinic and muscarinic) receptors located in adrenomedullary chromaffin cells. It also seems that epibatidine-evoked catecholamine release is not relevant to stimulation of histaminergic receptors.