• 국제물리치료학회지
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• 제6권2호
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• pp.846-851
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• 2015

This neurological damage accelerates the infection reaction of cells and apoptosis at the time of reperfusion after ischemia occurs. BCL-2/BCL-2 allogeneic begeminum has a function of suppressing the apoptosis of cells, and thus it is inferred that the susceptibility of cells to apoptosis is determined by the amount of allogeneic begeminum present which is determined based on the amount of BAX. Ischemia was induced in SD mice by occluding the common carotid artery for 5 minutes, after which blood was re-perfused. NEES was applied to acupuncture points, at 12, 24, and 48 hours post-ischemia on the joksamri, Hapgok. Protein expression was investigated through BAX antibody immuno-reactive cells in the cerebral nerve cells and Western blotting. The results were as follows: In the present study as well, as a result of observation of the change in the number of the BAX reaction cells after the inducement of GI, there was the aspect of most of the BAX reaction cells being observed in the corpus striatum area of the GI group 24 hours after the inducement of ischemia. This revealed the same results as those of previous studies in which the change in the number of BAX reaction cells occurred in all areas while ischemia was in progress. The change in the expression of BAX protein after 24 hours showed that there was a very significant reduction in the NEES group compared to the GI group (p<.01). As a result, a greatest amount of change in the number of BAX immunoreactive cells related to apoptosis 24 hours after ischemia appeared in the NEES group. This study that ischemia increases the expression of BAX that induces apoptosis. Thus, it is determined that ischemia is the main cause of the apoptosis of neurons, and this study reveals that low frequency needle electrode electrical stimulation has the effect of blocking the apoptosis of neurons by reducing protein related to the apoptosis of cells that has increased after ischemia has occurred.

• IMMUNE NETWORK
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• 제4권2호
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• pp.100-107
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• 2004

Background: The fruit of Rubus coreanus (RC), a perennial herb, has been cultivated for a long time as a popular vegetable. The anti-allergy mechanism of RC is unknown. The purpose of this study is to investigate the inhibitory effect of RC on compound 48/80- or anti-DNP IgE-induced mast cell activation. Methods: For this, influences of RC on the compound 48/80-induced degranulation, histamine release, calcium influx and the change of the intracellular cAMP (cyclic adenosine-3',5' monophosphate) levels of rat peritoneal mast cells (RPMC) and on the anti-DNP IgE-induced histamine release of RPMC were observed. Results: The pretreatment of RC inhibited compound 48/80-induced degranulation, histamine release and intracelluar calcium uptake of RPMC. The anti-DNP IgE-induced histamine release of RPMC was significantly inhibited by pretreatment of RC. The RC increased the level of intracellular cAMP of RPMC, and the pretreatment of RC inhibited compound 48/80-induced decrement of intracellular cAMP of RPMC. Conclusion: These results suggest that RC contains some substances with an activity to inhibit the compound 48/80- or anti-DNP IgE-induced mast cell activitation. The inhibitory effects of RC are likely due to the stabilization of mast cells by blocking the calcium uptake and enhancing the level of intracellular cAMP.

• Toxicological Research
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• 제28권1호
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• pp.33-38
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• 2012

In this study, we investigated the effect of methanolic extract isolated from the root of Lycoris aurea (LA) on the growth of cancer cells and the tube formation activity of endothelial cells. Various cancer cells were treated with LA at doses of 0.3, 1, 3, 10 or 30 ${\mu}g/ml$ and LA significantly suppressed the growth of several cancer cell lines, including ACHN, HCT-15, K-562, MCF-7, PC-3 and SK-OV-3, in a dose-dependent manner. We also found that LA induced cell cycle arrest at G2/M phase in ACHN renal cell adenocarcinoma cells. Further study demonstrated that LA concentration-dependently inhibited the tube formation, which is a widely used in vitro model of reorganization stage of angiogenesis, in human umbilical vein endothelial cells. Collectively, these results show that LA inhibits the growth of cancer cells and tube formation of endothelial cells and the growth-inhibitory effect of LA might be mediated, at least in part, by blocking cell cycle progression.

• Biomolecules & Therapeutics
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• 제8권1호
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• pp.13-21
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• 2000

The present study was designed to investigate the effect f quinidine on catecholamine (CA) secretion evoked by ACh, high $K^{+}$, DMPP, McN-A343, cyclopiazonic acid and Bay-K-8644 from the isolated perfused rat adrenal gland and to establish the mechanism of its action. The perfusion of quinidine (15-150 $\mu$M) into an adrenal vein for 60 min produced relatively dose- and time-dependent inhibition in CA secretion evoked by ACh (5.32$\times$10$^{-3}$ M), high $K^{+}$ (5.6$\times$10$^{-2}$ M), DMPP (10$^{-4}$ M for 2 min), McN-A-343 (10$^{-4}$ M for 2 min), cyclopiazonic acid (10$^{-5}$ M for 4 min) and Bay-K-8644 (10$^{-5}$ M for 4 min). Furthermore, in adrenal glands pre-loaded with quinine (5$\times$10$^{-5}$ M), CA secretory responses evoked by veratridine (10$^{-4}$ M) was time-dependently inhibited. Also, in the presence of lidocaine (10$^{-4}$ M), which is also known to be a sodium channel blocker, CA secretory responses evoked by ACh, high potassium, DMPP, McN-A-343, Bay-K-8644 and cyclo-piazonic acid were also greatly reduced in similar fashion to that of quinidine-treatment. Taken together, these results suggest that quinidine causes greatly the inhibition of CA secretion evoked by stimulation of cholinergic (both nicotinic and muscarinic) receptors as well as by membrane depolarization, indicating strongly that this effect may be mediated by inhibiting influx of extracellular calcium and release in intracellular calcium in the rat adrenomedullary chromaffin cells. Furthermore, these findings indicate strongly that this inhibitory action of quinidine appears to be associated to the blocking action of sodium channels at least in CA secretion from the rat adrenal gland.and.

• 한국음향학회:학술대회논문집
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• 한국음향학회 1999년도 학술발표대회 논문집 제18권 1호
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• pp.263-268
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• 1999

Psychoacoustic characteristics of automobile hems influence subject's subjective evaluation and psychophysiological reactions on the sounds of car horns. However, differentiation of physiological responses to commercially availablenfluence subject's subjective evaluation and psychophysiological reactions on the s horns is a complicated task due to the small contrast in technical features of horns and the influence of habituation. Using 10 college students, comparative analysis of physiological reactivity was carried out in order to identify the effect of habituation on decrement of psychophysiological responsivity, assess the ability to differentiate subjectively most and least preferred/appropriate horns according to physiological manifestations. EEG and autonomic responses to 7 automobile horns were analyzed during 3 blocks of trials (each block was varied in order for presenting stimuli and acoustic parameters of horns). It was shown that electrodermal and cardiovascular responses had different reactivity patterns to repeated stimulation. Skin conductance variables (SCL, SCR) were habituated as a function of trial. Cardiac reactivity (HR, RSA) showed no signs of habituation. In contrast, sensitization was shown in the vascular component of response (pulse volume). The temporal EEG exhibited marked habituation of fast beta band power, while alpha-blocking effect did not habituate during the course of experiment. Differentiation of physiological responses of most and least preferred/appropriate horns was possible in this study. That is, some cardiovascular reactivity variables (HR, RSA, pulse volume, etc.) were differentiated between the least and the most preferred/appropriate horns during the experiment. However, EEG and electrodermal parameters showed significant differences only during first block of trials and were later affected by habituation.

• 전자공학회논문지S
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• 제36S권11호
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• pp.112-119
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• 1999

동영상 표준안인 H.263의 성능평가를 위해 사용되고 있는 TMN5는 변환부호화방법으로 DCT를 기본으로 사용하고 있어 블록킹 현상의 문제점을 갖고 있다. 따라서 본 논문에서는 TMN5의 구조를 그대로 유지하면서 DCT를 DWT로 대체하고 이 구조에 적응하는 양자화기를 설계하였다. 실험의 결과로 평균 PSNR측면에서 휘도 신호는 평균 0.35dB 정도의 손실을 보였으나 색차 신호는 평균 2dB 정도 개선되었다. 주관적 화질평가에서도 블록킹 현상이 감소되므로 TMN5에 비하여 우수한 화질의 영상을 얻을 수 있다. 또한 같은 전송속도에서 더 많은 프레임을 전송함으로 화면 드롭 현상을 줄일 수 있다.

• 대한한방내과학회지
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• 제41권1호
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• pp.44-58
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• 2020

Objectives: This study was conducted to identify the protective effects of Chongmyunggongjin-dan (CMGJD) on Hydrogen peroxide (H₂O₂)-induced apoptosis mechanisms in C6 glial cells. Method: We used CMGJD after distilled water extraction, filtration, and lyophilization. The ROS scavenging effect was examined by fluorescence microscopy. Expression levels of proteins related to ROS generation were investigated by western blotting. Functional changes in organelles related to Reactive oxygen species (ROS) generation were investigated by immunoblotting and by verifying expression level of relevant enzymes. Results: The CMGJD extract protected the cells against H₂O₂-induced morphological changes and DNA fragmentation, inhibited the increase of Heme_oxygenase-1(HO^-1) and the decrease in catalase, protected against the loss of mitochondrial membrane potential, inhibited disturbances of lysosomal function, and induced an increase in peroxisomes. Conclusion: CMGJD was confirmed to have a protective effect on H₂O₂-induced C6 glial cell death possibly by blocking the pathways causing damage to subcellular organelles, such as mitochondria, lysosomes, and peroxisomes. We assume that CMGJD will be effective for the prevention and treatment of ischemic stroke in a clinical environment.

• Asian Pacific Journal of Cancer Prevention
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• 제15권15호
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• pp.6247-6251
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• 2014

Background: The aim of the present study was to investigate the involvement of emodin on the growth of human breast cancer MCF-7 and MDA-MB-231 cells and the estrogen (E2) signal pathway in vitro. Materials and Methods: MTT assays were used to detect the effects of emodin on E2 induced proliferation of MCF-7 and MDA-MB-231 cells. Flow cytometry (FCM) was applied to determine the effect of emodin on E2-induced apoptosis of MCF-7 cells. Western blotting allowed detection of the effects of emodin on the expression of estrogen receptor ${\alpha}$, cyclin D1 and B-cell lymphoma-2 (Bcl-2), mitogen-activated protein kinases (MAPK) and phosphatidylinostiol 3-kinases (PI3K). Luciferase assays were emplyed to assess transcriptional activity of $ER{\alpha}$. Results: Emodin could inhibit E2-induced MCF-7 cell proliferation and anti-apoptosis effects, and arrest the cell cycle in G0/G1 phase, further blocking the effect of E2 on expression and transcriptional activity of $ER{\alpha}$. Moreover, Emodin influenced the ER ${\alpha}$ genomic pathway via downregulation of cyclin D1 and Bcl-2 protein expression, and influenced the non-genomic pathway via decreased PI3K/Akt protein expression. Conclusions: These findings indicate that emodin exerts inhibitory effects on MCF-7 cell proliferation via inhibiting both non-genomic and genomic pathways.

• Membrane and Water Treatment
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• 제9권3호
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• pp.163-172
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• 2018

This study investigated the effect of organic matter on the precipitation of struvite and calcium phosphate for phosphorus recovery from synthetic dairy wastewater. Batch precipitation experiments were performed to precipitate phosphorus from solutions containing $PO_4{^{3-}}$ and $NH_4{^+}$ by the addition of $Mg^{2+}$ and $Ca^{2+}$, separately, at varying pH, Mg/P and Ca/P molar ratios, and organic matter concentrations. Soluble total organic solids exhibited more inhibition to precipitation due to potential interaction with other dissolved ionic species involved in phosphorus precipitation. Xylan with low total acidity only exhibited significant inhibition at very high concentrations in synthetic wastewater (at up to 100 g/L). No significant inhibition was observed for Mg and Ca precipitation at relatively lower concentrations (at up to 1.2 g/L). MINTEQ simulations show that dissolved organic matter (DOM) as humic substances (HS) can cause significant inhibition even at relatively low concentrations of 0.165 g/L fulvic acid. However, scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis suggested that xylan altered the crystal structure of both precipitates and had caused the formation of smaller sized struvite crystals with slightly rougher surfaces This could be due to xylan molecules adhering on the surface of the crystal potentially blocking active sites and limit further crystal growth. Smaller particle sizes will have negative practical impact because of poorer settleability.

• 대한본초학회지
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• 제30권1호
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• pp.85-93
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• 2015

Objectives : Bilobalide (BIL) is a predominant sesquiterpene trilactone constituent that accounts for a partial portion of the standardized Ginkgonis Folium extract, which has been widely used to treat a variety of neurological disorders involving cerebral ischemia and neurodegeneration. In this study, it was tested whether BIL exhibits anti-inflammatory activities on inflammation response, or not. Methods : To elucidate the molecular mechanisms of BIL on pharmacological and biochemical actions in inflammation, we examined the effect of BIL on pro-inflammatory mediators in lipopolysaccharide (LPS)-stimulated macrophages. The investigation was focused on how BIL affect on inflammation-related mediators including various signals such as nitric oxide (NO), prostaglandin $E_2$ ($PGE_2$), inducible NO synthase(iNOS), cyclooxygenase-2(COX-2), interleukin-6(IL-6), tumor necrosis $factor-{\alpha}$ ($TNF-{\alpha}$), mitogen-activated protein kinases(MAPKs) and nuclear factor kappa-light-chain-enhancer of activated B cells ($NF-{\kappa}B$) in LPS-stimulated RAW 264.7 cells. Results : We found that BIL inhibited LPS-induced NO, $PGE_2$, IL-6 and $TNF-{\alpha}$ productions as well as the expressions of iNOS and COX-2. Furthermore, BIL suppressed the LPS-induced phosphorylation for MAPK activation. Conclusions : These results suggest that BIL has inhibitory effects on LPS-induced $PGE_2$, NO, IL-6 and $TNF-{\alpha}$ production, as well as the expressions of iNOS and COX-2 in the murine macrophage. It seems that these inhibitory effects occur by blocking the phosphorylation of MAPKs for activation. Then, BIL suppressed the activation of nuclear factor $NF-{\kappa}B$ in nucleus. These observations suggest that BIL has anti-inflammatory effect by inhibiting.