• 대한한의학회지
• /
• 제24권1호
• /
• pp.110-121
• /
• 2003

Objective : This research was performed to investigate the protective effect of Angelicae Dahuri Radix against ischemic damage using PC12 cells and global ischemia in gerbils. Methods : To observe the protective effect of Angelicae Dahuri Radix on ischemia damage, viability and changes in activities of superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase and production of malondialdehyde (MDA) were observed after treating PC12 cells with Angelicae Dahuri Radix during ischemic insult. Gerbils were divided into three groups : a normal group, a 5-min two-vessel occlusion (2VO) group, and an Angelicae Dahuri Radix administered after 2VO group. The CCAs were occluded by microclip for 5 minutes. Angelicae Dahuri Radix was administered orally for 7 days after 2VO. The histological analysis was performed at 7 days after surgery. For histological analysis, the brain tissue was stained with 1% cresyl violet solution. Results : 1. Angelicae Dahuri Radix has a protective effect against ischemia in the CA1 area of the gerbil hippocampus 7 days after 5-minute occlusion, 2. In the hypoxia/reperfusion model using PC12 cells, Angelicae Dahuri Radix has a protective effect against ischemia in the dose of $0.2\mu\textrm{g}/ml$, $2\mu\textrm{g}/ml$ and $20\mu\textrm{g}/ml$, 3. Angelicae Dahuri Radix increased the activities of glutathione peroxidase and catalase. 4. The activity of superoxide dismutase (SOD) was increased by ischemic damage, which might represent self protection. This study suggests that Angelicae Dahuri Radix has some neuroprotective effect against neuronal damage following cerebral ischemia in vivo with a widely used experimental model of cerebral ischemia in Mongolian gerbils, and it also has protective effects on a hypoxia/reperfusion cell culture model using PC12 cells. Conclusions : Angelicae Dahuri Radix has protective effects against ischemic brain damage at the early stage of ischemia.

• 대한한의학회지
• /
• 제23권4호
• /
• pp.113-124
• /
• 2002

Objects: This research was conducted to investigate the protective effect of Bupleuri Radix against ischemic damage using PC12 cells and global ischemia in gerbils, Methods: To observe the protective effect of Bupleuri Radixon ischemic damage, viability and changes in activities of superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase and production of malondialdehyde (MDA) were observed after treating PC12 cells with Bupleuri Radix during ischemic damage. Gerbils were divided into three groups: a normal group, a 5-minute two-vessel occlusion (2VO) group and a Bupleun Radix administered group after 2VO. The CCAs were occluded by microclip for 5 minutes, Bupleuri Radix was administered orally for 7 days after 2VO. Histological analysis was performed on the 7th day. For histological analysis, the brain tissue was stained with 1 % of cresyl violet solution. Results: 1. Bupleuri Radix has a protective effect against ischemia in the CA1 area of the gerbil's hippocampus 7 days after 5-minute occlusion. 2. In the hypoxia/reperfusion model using PC12 cells, the Bupleuri Radix has a protective effect against ischemia in the dose of 0.2{\;}\mu\textrm{g}/ml,2{\;}\mu\textrm{g}/ml{\;}and{\;} 20{\;}\mu\textrm{g}/ml$. 3. Bupleuri Radix increased the activities of glutathione peroxidase and catalase. 4. The increased activity of superoxidedismutase (SOD) by ischemic damage might have been induced as an act of self-protection. This study suggests that Bupleuri Radix has some neuroprotective effect against neuronal damage following cerebral ischemia in vivo with a widely used experimental model of cerebral ischemia in Mongolian gerbils. Bupleuri Radix also has protective effect on a hypoxia/reperfusion cell culture model using PC12 cells. Conclusions: Bupleuri Radix has protective effect against ischemic brain damage during the early stages of ischemia.

• Clinical and Experimental Pediatrics
• /
• 제46권10호
• /
• pp.1040-1043
• /
• 2003

저자들은 9세 남아에서 고혈압과 뇌혈관염이 동반된 상태에서 뇌증을 보인 HSP 신염 1례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다.

• 대한한방내과학회지
• /
• 제29권1호
• /
• pp.231-242
• /
• 2008

Objectives : We can find out the experimental reports of Yanggyuksanhwa-tang, which has the function of regulating blood pressure related with cerebral disease, and increasing local cerebral blood stream volume, also has the recoveries for the damage of vessel endothelium, and endothelium hypertrophy caused by angiospasm after subarachnoid hemorrhage, and reduces the contraction of smooth muscle, so simultaneously improves necrosis. The aim of this study is to investigate effect of Yanggyuksanhwa-tang protecting neuronal cells from being damaged by brain ischemia through using organotypic hippocampal slice cultures. Methods : We caused ischemic damage to organotypic hippocampal slice cultures by oxygen and glucose deprivation, and Yanggyuksanhwa-tang extract was added to cultures. Thereafter we measured area percentage of propidium iodide (PI)-stained neuronal cell, lactate dehydrogenase (LDH) levels in culture media and terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL)-positive cells. Results : Area percentage of PI-stained neuronal cells and count of TUNEL-positive cells in CA1 and DG area of organotypic hippocampal slice culture were significantly decreased in pertinent density level of Yanggyuksanhwa-tang extract. LDH levels in culture media of organotypic hippocampal slice culture were significantly decreased in pertinent density level of Yanggyuksanhwa-tang extract. Conclusions : Within pertinent density level, Yanggyuksanhwa-tang has cell protection effect that prevents brain ischemia damaging neuronal cells and apoptosis increasing.

• 분석과학
• /
• 제11권3호
• /
• pp.222-228
• /
• 1998

15종의 분자량이 낮은 휘발성 유기용매 물질류를 사용하여 에탄올에 대한 분리분석 등을 검토하기 위하여 5가지 충진 칼럼과 2가지 모세관 칼럼을 이용한 기체 크로마토그래피 실험에서 Gaskuropack 54 와 DB-1 column이 좋은 분리능을 보여 주었다. GC 기화평형법에 의한 생체물 시료의 알코올 농도 측정에서 0.6N 과염소산, 1M 메타인산 및 염화나트륨 포화용액을 이용한 salt-effect 첨가실험은 그 중 염화나트륨 포화 용액이 알코올 농도값을 얻는데는 가장 안정된 값을 보였다. 혈액 및 각 조직의 시료들에서 시간에 따른 농도변화 실험에서 에틸알코올 농도 변화, 무게 변화, 함수분 변화, 헤마토크리트 변화치 영향을 함께 실험한 결과, 용기의 직경에 따르는 알코올 농도의 감소 변화를 1차 함수로 제안 할 수 있었으며, NISI에 조사 의뢰된 25 부검 사례에서 각 장기별 에틸알코올 분배농도에 대한 실험에서 뇌, 혈액, 신장, 비장, 간장, 폐장의 순으로 분포율이 낮아지는 결과를 얻을 수 있었다.

• The Korean Journal of Physiology and Pharmacology
• /
• 제2권3호
• /
• pp.279-286
• /
• 1998

It has been well documented that transient forebrain global ischemia causes selective neuronal degeneration in hippocampal CA1 pyramidal neurons with a delay of a few days. The mechanism of this delayed hippocampal CA1 pyramidal neuronal death (DND) is still controversial. To delineate the mechanisms of the DND, the effects of treatment with MK-801, an NMDA receptor antagonist, kynurenic acid, a NMDA/non-NMDA receptor antagonist, and/or cycloheximide, a protein synthesis inhibitor, on the DND were investigated in male Wistar rats. To examine the participation of apoptotic neuronal death in the DND, TUNEL staining was performed in ischemic brain section. Global ischemia was induced by 4-vessel occlusion for 20 min. All animals in this study showed the DND 3 and 7 days after the ischemic insult. The DND that occured 3 days and 7 days after the ischemia were not affected by pretreatment with MK-801 (1 mg/kg), but markedly attenuated by the pretreatment with kynurenic acid (500 mg/kg). Treatment with cycloheximide (1 mg/kg) also markedly inhibited the DND. The magnitudes of attenuation by the two drugs were similar. The magnitude of attenuation by co-treatments with kynurenic acid and cycloheximide was not greater than that with any single treatment. TUNEL staining was negative in the sections obtained 1 or 2 days after the ischemic insults, but it was positive at hippocampal CA1 pyramidal cells in sections collected 3 days after the ischemia. These results suggested that the DND should be mediated by the activation of non-NMDA receptor, not by the activation of NMDA receptor and that the activation of AMPA receptor should induce the apoptotic process in the DND.

• Journal of Korean Medical Science
• /
• 제33권46호
• /
• pp.289.1-289.10
• /
• 2018

Background: Cerebral microbleeds (CMBs) are associated with cerebrovascular risk factors and cognitive dysfunction among patients with Parkinson's disease (PD). However, whether CMBs themselves are associated with PD is to be elucidated. Methods: We analyzed the presence of CMBs using 3-Tesla brain magnetic resonance imaging in non-demented patients with PD and in age-, sex-, and hypertension-matched control subjects. PD patients were classified according to their motor subtypes: tremor-dominant, intermediate, and postural instability-gait disturbance (PIGD). Other cerebrovascular risk factors and small vessel disease (SVD) burdens were also evaluated. Results: Two-hundred and five patients with PD and 205 control subjects were included. The prevalence of CMBs was higher in PD patients than in controls (16.1% vs. 8.8%; odds ratio [OR], 2.126; P = 0.019); CMBs in the lobar area showed a significant difference between PD patients and controls (11.7% vs. 5.9%; OR, 2.234; P = 0.032). According to the motor subtype, CMBs in those with PIGD type showed significant difference from controls with respect to the overall brain area (21.1% vs. 8.9%; OR, 2.759; P = 0.010) and lobar area (14.6% vs. 4.9%; OR, 3.336; P = 0.016). Among PD patients, those with CMBs had higher age and more evidence of SVDs than those without CMBs. Conclusion: We found that CMBs are more frequent in PD patients than in controls, especially in those with the PIGD subtype and CMBs on the lobar area. Further study investigating the pathogenetic significance of CMBs is required.

• 대한본초학회지
• /
• 제27권6호
• /
• pp.83-90
• /
• 2012

Objectives : Modified Bo-Yang-Hwan-O-Tang (mBHT) is a polyherbal medicine of twelve herbs traditionally used in the treatment of cerebral and cardiac stroke and vascular dementia. The purpose of this study was to evaluate the neuroprotective effect, pyramidal neuronal cell, inflammation and apoptosis of mBHT against global ischemia in rats. Methods : Global ischemia was produced by two-vessel occlusion(2-VO) in SD male rats. mBHT at dose of 500 mg/kg was orally administrated for 2 weeks or 6 weeks after global ischemia. The histopathological changes of ischemic brain were observed by staining of hematoxylin and eosin (H&E) and Nissl and immunohistochemisty with anti-GFAP (glial fibrillary acidic protein) antibody as a astrocyte marker. The expression of inducible nitric oxide synthase (iNOS) and apoptotic proteins such as Bax, Bcl-2 and caspase-3 was determined by western blot. Results : mBHT treatment significantly inhibited the pyramidal neuronal loss in CA1 of hippocampus of global ischemic rats by 2-VO. mBHT also suppressed the activation of astrocytes in the CA1 at 6 weeks after ischemia. In addition, mBHT significantly increased the expression of anti-apoptotic protein, Bcl-2 on iscemic brain, and significantly attenuated the expression of apoptotic proteins, Bax and caspase-3. Conclusions : These results indicate that mBHT inhibits neuronal cell damage induced in global ischemia by 2-VO, suggesting that mBHT may be a potential candidate for the treatment of vascular dementia.

• 대한방사선기술학회지:방사선기술과학
• /
• 제46권1호
• /
• pp.9-14
• /
• 2023

When measuring cerebrovascular with 3D rotational angiography, the accuracy was verified by comparing the actual size and measurement size, respectively. It is intended to help select therapeutic materials and instruments during cerebrovascular intervention by comparing the average error rates for measured values in the 3DRA and CTA methods by examining with protocols such as brain CTA, which are always performed in emergency situations. The mean error rate between the groups of measurers was ±3.655% for radiation technologist and ±3.331% for university students, and the mean error rate of the student group was within tolerance (±10%), and the independent sample T-test result t =0.879, p=0.394 (p>0.05) showed no statistically difference between the two. In addition, the average error rate measured by both groups by 3DRA was measured below ±5% within the tolerance error rate (±10%), and most of CTA was measured within the tolerance range (±10%), but showed an average error rate of up to 5.65%, and the independent sample T-test result was statistically more accurate than 3DRA. Both the 3DRA method and the brain CTA method for measuring cerebrovascular size could be accurately measured within tolerance, but it would be better to measure cerebrovascular blood vessels using a more accurate 3DRA method during cerebrovascular intervention.

• 대한한방내과학회지
• /
• 제30권4호
• /
• pp.761-771
• /
• 2009

Objectives : The aim of this study was to assess the relationship between metabolic syndrome and erythrocyte deform ability in acute stroke patients. Methods : Among 88 of the recruited patients, 52 were diagnosed as metabolic syndrome. We assessed their general characteristics, risk factors. We compared the assessed variables between metabolic syndrome and control group. We analyzed the relationship between metabolic syndrome and erythrocyte deform ability. We analyzed relationship between cardiovascular risk factors and erythrocyte deformability. Results : The general characteristics waist and hip circumference, waist/hip ratio were higher in metabolic syndrome group. The metabolic syndrome group was also diagnosed with hypertension, DM, and hyperlipidemia more often than the control group. The blood test metabolic syndrome group showed higher triglycerides, total lipids, fasting blood sugar, and 2 hours postprandial plasma glucose level and lower HDL-cholesterol than the control group. There were more patients diagnosed with Dampness-Phlegm in the metabolic syndrome group. There were more patients showing lower erythrocyte deform ability in the metabolic syndrome group. The plasma homocysteine level was negatively correlated with erythrocyte deform ability. Conclusion : The results reconfirmed that the risk factors are more in metabolic syndrome group. The results indicated that metabolic syndrome lead to a lower erythrocyte deform ability in small vessel disease stroke patients. The Plasma homocysteine level was negatively correlated with erythrocyte deform ability.