개에서 발생한 이버멕틴 중독증 1례

여동원,윤기영,박정호,이왕희,송근호,박성준 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2011 動物醫科學硏究誌 Vol.18 No.1

A 1-year old, intact male Jin-do dog with ataxia, hypersalivation and anorexia was referred to the Veterinary Medical Teaching Hospital of Chungnam National University. Ivermectin toxicosis was diagnosed by the history taking, clinical signs, physical examination and neurological examination. After therapy with intravenous fluid and lipid emulsion administration, the clinical signs were found to have significantly improved.

분심기음의 항암작용 및 면역기능에 관한 연구

여대원,김진성,윤상협,류봉하,류기원 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2003 東西醫學硏究所 論文集 Vol.2003 No.-

This study was performed to investigate the effect of Bunsimgieum on antitumor effect after sarcoma-180 cells transplantation into peritoneal cavity or left groin and immune responses on the depressed immunity induced by methotrexate in mice. The Bunsimgieum extract of 10㎎/㎏ was orally administered 14 days for antitumor effects and 21 days for immune responses. 50% inhibitory concentration(IC_(50)) of SUN-1, SUN-C4. and SUN-396 cancer cell, mean sunvival days and body weight of tumor bearing mice, and growth of tumor mass for antitumor effect; delayed type hypersentivity, hemagglutinin titer, hemolysis titer, rosette forming cells, natured killer cell activity, lymphocyte transformation. productivity of interleukin-2 and phagocytic activity for their immune responses were measured in ICR mice. Significance in antitumor effect is noted in the enlongation of mean life days and inhibition of tumor growth(p<0.01 respectively). Significance of immune responses is also noted in hemolysis titer, lymphocyte transfumotion IL-2 productivity, phagocytic activity, and natural killer cell activity at E/T ratio 100 : 1(p<0.01, respectively). Significant in rosette cell formation was seen dosage of 20㎎/㎏(p<0.01) However, Difference of body weight as antitumor effect, delayed type hypersensitivity, and hemagglutinin titer were not shown significantly. According to the above results, it could be suggested that Bunsimgieum has prominent antitumor and immunity enhancing effect.

제2형 당뇨병 환자에서 체내 총항산화능 측정의 의의

윤여일,윤석기,김선규,김용현,남일송,차건영,황의원,김영선 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2

Background: The diabetic patients are at significantly increased risk of developing vascular disease. It's etiology may involve oxidative damage by free radiacals and protection againse such damage can be offered by antioxidants. We investigated that oxidative stress as assessed by measurement of total antioxidant status may play a role in development of diabetes mellitus. Method: We measured total antioxiant status using merchandised kit, glycated hemeglobin(HbA1c) in 46 type 2 diabetes mellitus patients and 50 healthy matched control subjects. Result: The total antioxidant status(TAS) was 2.10(±0.04) mmol/L in uncontrolled type 2 DM patients, 2.60(±0.03) in controlled type 2 DM patients and 2.70(±0.16) in healthy control subjects. TAS was significantly lower(P<0.05) in uncontrolled type 2 DM patients, but no significant association between in controlled type 2 DM patients and healthy control subjects. The TAS was 2.00(±0.17) mmol/L in complicated type 2 DM patients and 2.10(±0.29) uncomplicated type 2 DM patients. There was no significant associations between complicated type 2 DM patients and uncomplicated type 2 DM patients. Conclusion: Poor glycemic control is associated with reduced TAS in type 2 DM patients. TAS was thought indirect index that predict glycemic control of type 2 DM patients.

Mg이 흡착된 Si(111)7×7 표면 재배열 구조

안기석,여환욱,이경원,이순보,박종윤 성균관대학교 기초과학연구소 1993 論文集 Vol.44 No.1

Si(111)7×7 위에 Mg을 흡착시켜 표면 구조의 변화를 RHEED(Reflection High Energy electron Diffraction)와 XPS(X-ray Photoelectron Spectroscopy)를 이용하여 연구하였다. RT∼200℃까지의 기판온도에서 증착량의 증가에 따라 표면구조는 7×7에서 diffused 1×1, 그리고 2√3/3×2√3/3-R30° 구조로 변화하였다. 이를 thermal annealing하여 3-Domain 3×1 구조를 관측하였고, 이 결과는 J. Quinn등의 결과와 일치함을 알 수 있다. 또한, 기판온도를 증가시킴에 따라 diffuse 1×1, Single domain 3×1구조(450℃)에 대하여 Mg(KLL)/Si(2p) peak intensity ratio를 증착량 증가에 따라 측정하여 각기 다른 온도에서의 Mg 흡착에 대한 mechanism을 제시하였다. Change of the Si(111)7×7 surface structure upon Mg adsorption was studied by RHEED(Reflection HI호 Energy Electron Diffraction) and XPS(X-ray Photoelectron Spectrocopy). The RHEED patterns of Si(111)7×7 were changed to the diffuse 1×1 and 2√3/3×2√3/3-R30° patterns with increasing the deposition times of Mg at RT. The diffuse 1×1, 3-domain, and single domain 3×1 structures appeared successively at the adsorption temperature of 300, 350 and 450℃, respectively. We could find the relative coverages of these structures by measuring Mg(KLL)/Si2p XPS intensity ratio.

멸균방법에 따른 탈회동종골의 세포독성 여부에 관한 실험적 연구

임창준,김종여,우기선,김세원 大韓顎顔面成形再建外科學會 1997 Maxillofacial Plastic Reconstructive Surgery Vol.19 No.3

Procurement, cutting, cleansing, freezing, freeze-drying, and demineralization of the allogeneic bone must be made under the germ-free stable condition without bacterial and/or viral contamination. Even thought the bone is procured under the germ free condition, we must have confidence on disinfection of all the solutions that come in contact with tissue during the whole procedure. Lots of antibacterial agents have been introduced for chemical sterilization. Recently ethylene oxide gas sterilization or radiation sterilization is frequently selected as a secendary sterilization procedure. The biological and biochemical response of the graft material differs with the type and concentration of the sterilizing agents, and various toxic reactions have been reported due to the graft material itself and the substance released by the chemicals. The authors conducted the Millipore filter test to observe the toxic effect on L929 fibroblasts according to the effect on activity of succinate dehydrogenase, during the secondary sterilization of the demineralized allogeneic bone powder with irradiation or ethylene oxide gas. The result were as follows: 1. Around the copper disk, positive control group, 10mm diameter discoloration was observed. 2. As same as the negative control group, the disk showed no discoloration. 3. The demineralized allogeneic bone which was sterilized with ethylene oxide gas or irradiation showed no cytotoxicity. 4. From this results, it is suggested that treatment with ethylene oxide gas or irradiation should be effective to sterilize the deminineralized allogeneic bone.

Effects of Streptozotocin-Induced Type 1 Diabetes on Cell Proliferation and Neuronal Differentiation in the Dentate Gyrus : Correlation with Memory Impairment

Jung Hoon Choi,In Koo Hwang,Sun Shin Yi,Ki-Yeon Yoo,Choong Hyun Lee,Hyung-Cheul Shin,Yeo Sung Yoon,Moo-Ho Won 대한해부학회 2009 Anatomy & Cell Biology Vol.42 No.1

We examined the effects of steptozotocin (STZ)-induced type 1 diabetes on cell proliferation and neuroblasts in the subgranular zone of the hippocampal dentate gyrus (SZDG) of male Wistar rats. Change in memory function was also investigated using the passive avoidance test. In the SZDG, Ki67 (a marker for cell proliferation) positive nuclei were significantly decreased at 2 and 3 weeks and slightly decreased at 4 weeks after STZ treatment. Doublecortin (DCX, a marker for neuronal differentiation)-immunoreactive (+) neuroblasts with tertiary dendrites were significantly decreased in the STZ-treated group compared to those in the vehicle-treated group. However, DCX+ neuroblasts without tertiary dendrites were abundant at 4 weeks after STZ treatment. In addition, retention latency time in STZ-treated group was similar to that of vehicle-treated group at 2 and 3 weeks after STZ treatment. However, the retention latency time was significantly decreased at 4 weeks after STZ treatment. These results suggest that STZ significantly reduced cell proliferation and neuroblasts at 2~3 weeks after STZ treatment, but not at 4 weeks after STZ treatment although memory impairment was detected at 4 weeks after STZ treatment. The gradual reduction of DCX+ neuroblasts with tertiary dendrites may be associated with the impairment of hippocampus-related memory function.

Effects of pyridoxine on a high‐fat diet‐induced reduction of cell proliferation and neuroblast differentiation depend on cyclic adenosine monophosphate response element binding protein in the mouse dentate gyrus

Yoo, Dae Young,Kim, Woosuk,Yoo, Ki‐,Yeon,Nam, Sung Min,Chung, Jin Young,Yoon, Yeo Sung,Won, Moo‐,Ho,Hwang, In Koo Wiley Subscription Services, Inc., A Wiley Company 2012 JOURNAL OF NEUROSCIENCE RESEARCH - Vol.90 No.8

<P><B>Abstract</B></P><P>In this study, we challenged pyridoxine to mice fed a high‐fat diet (HFD) and investigated the effects of pyridoxine on HFD‐induced phenotypes such as blood glucose, reduction of cell proliferation and neuroblast differentiation in the dentate gyrus using Ki67 and doublecortin (DCX), respectively. Mice were fed a commercially available low‐fat diet (LFD) as control diet or HFD (60% fat) for 8 weeks. After 5 weeks of LFD or HFD treatment, 350 mg/kg pyridoxine was administered for 3 weeks. The administration of pyridoxine significantly decreased body weight in the HFD‐treated group. In addition, there were no significant differences in hepatic histology and pancreatic insulin‐immunoreactive (‐ir) and glucagon‐ir cells of the HFD‐treated group after pyridoxine treatment. In the HFD‐fed group, Ki67‐positive nuclei and DCX‐ir neuroblasts were significantly decreased in the dentate gyrus compared with those in the LFD‐fed mice. However, the administration of pyridoxine significantly increased Ki67‐positive nuclei and DCX‐ir neuroblasts in the dentate gyrus in both LFD‐ and HFD‐fed mice. In addition, the administration of pyridoxine significantly increased the protein levels of glutamic acid decarboxylase 67 (GAD67) and brain‐derived neurotrophic factor (BDNF) and the immunoreactivity of phosphorylated cyclic AMP response element binding protein (pCREB) compared with the vehicle‐treated LFD‐ and HFD‐fed mice. In contrast, the administration of pyridoxine significantly decreased HFD‐induced malondialdehyde (MDA) levels in the hippocampus. These results showed that pyridoxine supplement reduced the HFD‐induced reduction of cell proliferation and neuroblast differentiation in the dentate gyrus via controlling the levels of GAD67, pCREB, BDNF, and MDA. © 2012 Wiley Periodicals, Inc.</P>

Effects of <i>Ginkgo biloba</i> Extract on Promotion of Neurogenesis in the Hippocampal Dentate Gyrus in C57BL/6 Mice

YOO, Dae Young,NAM, YoonYi,KIM, Woosuk,YOO, Ki-Yeon,PARK, Jaeil,LEE, Choong Hyun,CHOI, Jung Hoon,YOON, Yeo Sung,KIM, Dong-Woo,WON, Moo-Ho,HWANG, In Koo Japanese Society of Veterinary Science 2011 The Journal of veterinary medical science Vol.73 No.1

<P><I>Ginkgo biloba </I>leaf extract (Gb) has been known to improve blood flow and preclude the tissue from free radical damage. Effects of Gb were examined by using Ki67, a specific proliferative marker for cellular proliferation, and doublecortin (DCX), a marker for immature neurons, indicating degree of neuroblast differentiation in the hippocampal dentate gyrus (DG) of adult C57BL/6 mice. The mice were fed with Gb at 40 and 100 mg/kg once daily for 28 days. The increase of Ki67- and DCX-immunoreactive cells in the DG was increased in a dose-dependent manner. Especially, the group having 100 mg/kg Gb showed a significant increase of DCX-immunoreactive neuroblasts with well-developed tertiary dendrites. Expression of DCX protein in the Gb groups was also significantly increased upon compared with the vehicle group. The results suggested that repeated intake of Gb would enhance cell proliferation and neuroblast differentiation in the mouse DG.</P>

Effects of High Cholesterol Diet on Newly Generated Cells in the Dentate Gyrus of C57BL/6N and C3H/HeN Mice

KIM, Il Yong,HWANG, In Koo,CHOI, Ji Won,YOO, Ki-Yeon,KIM, Yo Na,YI, Sun Shin,WON, Moo-Ho,LEE, In Se,YOON, Yeo Sung,SEONG, Je Kyung Japanese Society of Veterinary Science 2009 The Journal of veterinary medical science Vol.71 No.6

<P>In this study, we observed and compared the effects of a high cholesterol diet (HCD) on cell proliferation and differentiation in the subgranular zone of the dentate gyrus of C57BL/6N (B6, susceptible strain) and C3H/HeN (C3H, resistant strain) mice. Ki67 (a marker for cell proliferation) positive cells) were significantly decreased in HCD-fed B6 mice compared to those in B6 (49.7%) and C3H mice fed a low cholesterol diet (LCD). In addition, doublecortin (DCX, a marker for cell differentiation or neuroblasts)-immunoreactive cells in HCD-fed B6 mice were significantly decreased compared to those in LCD-fed B6 and C3H mice. These results suggest that B6 strains are sensitive to HCD, which impairs cell proliferation and differentiation.</P>

Effects of Cu,Zn-superoxide dismutase on cell proliferation and neuroblast differentiation in the mouse dentate gyrus.

Yoo, Dae Young,Shin, Bich Na,Kim, In Hye,Kim, Woosuk,Kim, Dae Won,Yoo, Ki-Yeon,Choi, Jung Hoon,Lee, Choong Hyun,Yoon, Yeo Sung,Choi, Soo Young,Won, Moo-Ho,Hwang, In Koo Kluwer Academic/Plenum Publishers 2012 Neurochem Res Vol.37 No.2

<P>Oxidative stress is one of the most important factors in reducing adult hippocampal neurogenesis in the adult brain. In this study, we observed the effects of Cu,Zn-superoxide dismutase (SOD1) on lipid peroxidation, cell proliferation, and neuroblast differentiation in the mouse dentate gyrus using malondialdehyde (MDA), Ki67, and doublecortin (DCX), respectively. We constructed an expression vector, PEP-1, fused PEP-1 with SOD1, and generated PEP-1-SOD1 fusion protein. We administered PEP-1 and 100 or 500 관g PEP-1-SOD1 intraperitoneally once a day for 3 weeks and sacrificed at 30 min after the last administrations. PEP-1 administration did not change the MDA levels compared to those in the vehicle-treated group, while PEP-1-SOD1 treatment significantly reduced MDA levels compared to the vehicle-treated group. In the PEP-1-treated group, the number of Ki67-positive nuclei was similar to that in the vehicle-treated group. In the 100 관g PEP-1-SOD1-treated group, the number of Ki67-positive nuclei was slightly decreased; however, in the 500 관g PEP-1-SOD1-treated group, Ki67-positive nuclei were decreased to 78.5% of the vehicle-treated group. The number of DCX-positive neuroblasts in the PEP-1-treated group was similar to that in the vehicle-treated group. However, the arborization of DCX-positive neuroblasts was significantly decreased in both the 100 and 500 관g PEP-1-SOD1-treated groups compared to that in the vehicle-treated group. The number of DCX-positive neuroblasts with tertiary dendrites was markedly decreased in the 500 관g PEP-1-SOD1-treated group. These results suggest that a SOD1 supplement to healthy mice may not be necessary to modulate cell proliferation and neuroblast differentiation in the dentate gyrus.</P>