이스라엘잉어 장관 수축에 관여하는 약물수용체에 관한 연구

윤효인,한경호,박승춘,조준형,오태광,Yun, Hyo-in,Han, Kyong-oh,Park, Seung-chun,Cho, Joon-hyoung,Oh, Tae-kwang 대한수의학회 1994 大韓獸醫學會誌 Vol.34 No.3

In order to elucidate the characterization of receptors involved in inestinal motility of Israeli carp, spontaneously contracting Israeli carp intestinal preperations were prepared and mounted in the organ chambers for contraction traicings using a polygraph. Various contractile agonists were treated and their dose-response curves were constructed. $EC_{50}$ values$(pD_2)$ of each agonist on specific receptors, $pA_2$ values of competitive antagonists against some agonists, and $K_1$, values of noncompetitive antagonists against some agonists were analyzed for characterization of receptors related with the intestinal contraction. Results obtained through the experiments were summarized as follows: 1. Acetylcholine(ACh) exhibited biphasic dose-response curves: initial ACh-induced dose dependent contractions were observed in pM levels but followed by decreased response in in-between concentration levels. Dose dependent contractions reappeared in ${\mu}M$ level. The peaks in pM and ${\mu}M$ levels appeared in $10^{-13}M$ and $3{\times}10^{-5}M$, respectvely. 2. Carbachol(CaCh) exhibited dose dependent contractions from $10^{-9}M$ to $10^{-5}M$, and its $pD_2$ values were higher than those of ACh($5.60{\pm}0.11$). ACh and CaCh exhibited equiactive contractions. Nicotine had no effects on contractile responses of Israeli carp intestine. 3. ACh-induced responses were inhibited by atropine($K_1:7{\times}10^{-8}M$), a muscarinic antagonist, in a non-competitive manner. But CaCh-induced responses were inhibited by both antimuscarinic atropine($pA_2:9.52{\pm}0.14$) and selective $M_2$ antagonistic 4-DAMP($pA_2:8.16{\pm}0.09$), in competitive manners. Nicotine receptor antagonistic decamethonium and hexamethonium had no effects on ACh-and CaCh-induced contractions. Therefore, the cholinergic receptor related to intestinal motility of Israeli carp was assumed as $M_2$ type. 4. In Israeli carp intestine, 5-HT (serotonin) exhibited dose dependent contractions in concentration range from $10^{-8}M$ to $10^{-5}M$. The maximal responses, however, were corresponded to about 50% of those of ACh or CaCh. 5-HT induced contractions were inhibited by $5-HT_2$ antagonistic ketanserin ($K_1: 7.8{\times}10^{-4}M$) in a non-competitive manner, but not by both of anti $5-HT_1$, spiperone and anti $5-HT_3$, MDL-72222. Hence, $5-HT_2$ receptors are suggested to be existed in Isreli carp intestine.

Suppression of peroxisome proliferator-activated receptor gamma-coactivator-1alpha normalizes the glucolipotoxicity-induced decreased BETA2/NeuroD gene transcription and improved glucose tolerance in diabetic rats.

Kim, Ji-Won,You, Young-Hye,Ham, Dong-Sik,Cho, Jae-Hyoung,Ko, Seung-Hyun,Song, Ki-Ho,Son, Ho-Young,Suh-Kim, Haeyoung,Lee, In-Kyu,Yoon, Kun-Ho Association for the Study of Internal Secretions 2009 Endocrinology Vol.150 No.9

<P>Peroxisome proliferator-activated receptor gamma-coactivator-1alpha (PGC-1alpha) is significantly elevated in the islets of animal models of diabetes. However, the molecular mechanism has not been clarified. We investigated whether the suppression of PGC-1alpha expression protects against beta-cell dysfunction in vivo and determined the mechanism of action of PGC-1alpha in beta-cells. The studies were performed in glucolipotixicity-induced primary rat islets and INS-1 cells. In vitro and in vivo approaches using adenoviruses were used to evaluate the role of PGC-1alpha in glucolipotoxicity-associated beta-cell dysfunction. The expression of PGC-1alpha in cultured beta-cells increased gradually with glucolipotoxicity. The overexpression of PGC-1alpha also suppressed the expression of the insulin and beta-cell E-box transcription factor (BETA2/NeuroD) genes, which was reversed by PGC-1alpha small interfering RNA (siRNA). BETA2/NeuroD, p300-enhanced BETA2/NeuroD, and insulin transcriptional activities were significantly suppressed by Ad-PGC-1alpha but were rescued by Ad-siPGC-1alpha. PGC-1alpha binding at the glucocorticoid receptor site on the BETA2/NeuroD promoter increased in the presence of PGC-1alpha. Ad-siPGC-1alpha injection through the celiac arteries of 90% pancreatectomized diabetic rats improved their glucose tolerance and maintained their fasting insulin levels. The suppression of PGC-1alpha expression protects the glucolipotoxicity-induced beta-cell dysfunction in vivo and in vitro. A better understanding of the functions of molecules such as PGC-1alpha, which play key roles in intracellular fuel regulation, could herald a new era of the treatment of patients with type 2 diabetes mellitus by providing protection from glucolipotoxicity, which is an important cause of the development and progression of the disease.</P>

혈액투석시 Double Lumen Silicone Rubber Catheter ( = Permcath ) 사용의 임상적 경험

차대룡(Dae Ryong Cha),김선숙(Sun Sook Kim),이영호(Young Ho Lee),권영주(Young Joo Kwon),조원용(Won Yong Cho),김형규(Hyoung Kyu Kim),선경(Kung Sun),김정숙(Jung Sook Kim),함인귀(In Gui Ham),김미경(Mi Kyung Kim) 대한내과학회 1994 대한내과학회지 Vol.46 No.4

N/A Background: Repeated, long-term access of the vascular system is a prerequisite for successful extended care of the patients with end stage renal disease (=ESRD) treated with hemodialysis. Despite recent technical advances in percutaneous venous cannulation, vascular access remains a major problem in patients requiring acute Hemodialysis. Although the subclavian cannula has gained a large clinical acceptance in recent years, it carries specific risks such as hemothorax, pneumothorax, venus stenosis, thrombus formation and infection. Recently, a double-lumen, central venous catheter made of Silicone Rubber (=Perm cath) has developed for use as a vascular access device, This device is particularly useful in patients who have exhausted other vascular access sites or who have severe cardiovascular disease. Methods: A total of 23 dual-lumen silicone rubber catheters were placed through the internal jugular vein in 23 patients as a vascular access at our institution during the period of April, 1992 through November, 1992. The perm-cath (Hemocath, Quinton, Seattle) is 36 Cm long and each lumen has an internal diameter of 2 mm. Implantation of the catheters occurred in the operating room and under strict aseptic conditions through the right internal jugular vein. A 10 cm subcutaneous tunnel was then created, which extended from the in-cison to a point 2 cm above the ipsilateral clavicle. The catheter was passed out through the upper portion of the subcutaneous tunnel with the Dacron cuff placed 2 cm from the lower end of the tunnel, acting as both an anchor and a barrier to infection. The tip of the catheter was inserted through an internal jngular vein terminating in the right atrium under EKG monitoring. Each lumen of the catheter was filled with 1000 units of heparin sodium (1.5 ml in venous line, 1.5 ml in arterial line) and capped. Results : The mean duration of catheter use was 24±16 days (8 to 119 days), and the complication of perm-cath occurred in 3 cases such as venous thrombosis in 1 case, catheter exit site infection in 1 case, and exit site hematoma in 1 case. During hemodialysis, blood flow rate ranged from 190 to 313ml/min (mean:235±26ml/ min), and venous retrun pressure ranged from 20 to 150 mmHg(mean:65±16mmHg). Total 14 catheters were removed during treatment and the causes of catheter removal were patient death in 8 cases, venous thrombosis 1, recovery from acute rena1 failure 2, fistula maturation 2, infection 1. Conclusion: Internal jugular vein cannulation with silastic catheter which offers a new percutaneous method was provided safe and reliable as the temporary central vein access. The catheters are well tolerated by the patients and have the advantages of immediate use after placement, high blood flow rates, no repetitive venipuncture, and no cardiac dysfunction. Permcath is particulary useful in patients who have exhausted other vascular access site, severe cardiovascular disease, and terrified by repetitive venipuncture. Though our initial experience has been favorable, there will be needed to evaluate the outcome of permcath over longer period of time.

양성 및 음성 정신분열증 환자의 시각적주의폭에 관한 연구

최정인,이형영,윤진상 大韓神經精神醫學會 1988 신경정신의학 Vol.27 No.5

This study was performed to compare the visual attention span among three groups of 22 negative schizophrenics, 29 positive schizophrenics and 30 normal controls. The narrowing and broadening of attention span were tested by comparing correct recognition responses of peripheral visual stimulus. The results are as follows : 1) There was a significant difference in the total number of correct recognition responses among three groups; In controls, the total number of the correct recognition responses was highest and this was followed by positive schizophrenics(P<0.01). The number of the correct recognition responses was higher in larger stimulus size than in small stimulus size in all three groups(P<0.01). 2) Comparing groups and stimulus size; there was no significant difference in large stimulus size. In small stimulus size, there was significant difference between postivive schizophrenics and controls(P<0.05), between negative schizophrenics and controls(P<0.01), and between negative schizophrenics and positive schizophrenics(P<0.01). 3) Comparing groups and display angle, there was no significant difference in display angle 2˚ among three groups, while there was significant difference in display angle 12˚ between negative schizophrenics and controls(P<0.01), and significant difference in display angle 25˚ between negative schizophrenics and controls and between negative schizophrenics and positive schizophrenics(P<0.01), respectively. In summary, these results suggest that negative schizophrenics, unlike postive schizophrenics and controls, are only able to recognize large peripheral stimulus within a narrow display angle, because of narrowing of attention span.

Glucotoxicity in the INS-1 Rat Insulinoma Cell Line Is Mediated by the Orphan Nuclear Receptor Small Heterodimer Partner

Park, Keun-Gyu,Lee, Kyeong-Min,Seo, Hye-Young,Suh, Ji-Ho,Kim, Hye-Soon,Wang, Li,Won, Kyu-Chang,Lee, Hyoung-Woo,Park, Joong-Yeol,Lee, Ki-Up,Kim, Jung-Guk,Kim, Bo-Wan,Choi, Hueng-Sik,Lee, In-Kyu American Diabetes Association 2007 Diabetes Vol.56 No.2

<P>Prolonged elevations of glucose concentration have deleterious effects on beta-cell function. One of the hallmarks of such glucotoxicity is a reduction in insulin gene expression, resulting from decreased insulin promoter activity. Small heterodimer partner (SHP; NR0B2) is an atypical orphan nuclear receptor that inhibits nuclear receptor signaling in diverse metabolic pathways. In this study, we found that sustained culture of INS-1 cells at high glucose concentrations leads to an increase in SHP mRNA expression, followed by a decrease in insulin gene expression. Inhibition of endogenous SHP gene expression by small interfering RNA partially restored high-glucose-induced suppression of the insulin gene. Adenovirus-mediated overexpression of SHP in INS-1 cells impaired glucose-stimulated insulin secretion as well as insulin gene expression. SHP downregulates insulin gene expression via two mechanisms: by downregulating PDX-1 and MafA gene expression and by inhibiting p300-mediated pancreatic duodenal homeobox factor 1-and BETA2-dependent transcriptional activity from the insulin promoter. Finally, the pancreatic islets of diabetic OLETF rats express SHP mRNA at higher levels than the islets from LETO rats. These results collectively suggest that SHP plays an important role in the development of beta-cell dysfunction induced by glucotoxicity.</P>

Three-dimensional CFD analysis of hydrogen-air-steam explosions in APR1400 containment

Hasslberger, Josef,Kim, Hyoung Ki,Kim, Byung Jo,Ryu, In Chul,Sattelmayer, Thomas Elsevier 2017 Nuclear engineering and design Vol.320 No.-

<P><B>Abstract</B></P> <P>The present study concerns the three-dimensional CFD analysis of hydrogen explosions in APR1400 containment. Initial conditions for combustion simulations are obtained by a cost-effective coupling with a lumped parameter code for preceding mixture distribution analysis. Three severe accident scenarios are examined: Small-Break Loss-Of-Coolant Accident (SB-LOCA) and Station Black-Out (SBO) with activated as well as deactivated three-way valve. Only in the last case, thermal ignition of the hydrogen-air-steam mixture could be triggered. Flame propagation in the containment and particularly in the In-containment Refueling Water Storage Tank (IRWST) is investigated in detail. Additional generic scenarios demonstrate the methods ability to reproduce strong Flame Acceleration (FA) and even the hazardous Deflagration-to-Detonation Transition (DDT).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Full-scale 3D CFD analysis of hydrogen explosions in APR1400 containment is presented. </LI> <LI> A new cost-effective lumped parameter code to CFD coupling strategy is proposed. </LI> <LI> In the Station Black-Out accident, the three-way valve is a major safety improvement. </LI> <LI> Most critical conditions are found in the In-containment Refueling Water Storage Tank. </LI> </UL> </P>

중수 회수 시스템에서 운전 경험

안현경,이인형 순천향대학교 부설 산업기술연구소 2005 순천향 산업기술연구소논문집 Vol.11 No.2

The moisture inside the coolant and moderator system areas of Candu-type nuclear power plant is recycled to prevent the value deuterium to being lost and the harm of tritium form being spread to the natural environment. The deuterium is separated from the moisture by the successive processes such as adsorption and desorption on molecular sieve, cooling with water purification with activated carbon filer, ion exchange, and evaporation in the deuterium recovery system that consists of dryers, storage tank. filter, three ion exchange bed, evaporators, and upgrader. The water collected in the dryers in transformed from the kinds of moisture generated inside the primary system of nuclear plant and supplied with the fresh air. In addition, hydrazine can be included in the moisture such that the water might be alkaline. Unexpectedly, the solution in the storage tank followed from dryers is acidic and the deuterium water collected in the upgrader is also acidic in Wolsung nuclear unit 1. The concentration of chloride is about 500 ppm and pH is 3.8 in the storage tanks of dryers, while the white precipitation of aluminum and silica oxides exist to some degree before filter and to fair extent after ion exchange bed. Hydrazine and its derivative, ammonia are not high(less than 1ppm). Concentration of chloride was source of salt include in the fresh air. The sources of aluminum and silica oxides were products thermally decomposed from molecular sieve. The impurities decrease the removal efficiency of filtration and ion exchange and shorten sieve. The impurities decrease the removal efficiency of filtration and ion exchange and shorten the operation lifetimes of their facilities. In this case the chloride can be transferred to the upgrager in which the packing material, copper might be corroded. Therefore the fresh air should be treated completely to remove the salt. The capacity of the activated carbon filter in the purification system might be increased.

심인성쇼크로 관상동맥 중재술 중 대동맥 내 풍선펌프 사용 시 임상 경과

이재필 ( Jae Pil Lee ),남창욱 ( Chang Wook Nam ),박정호 ( Jung Ho Park ),배종엽 ( Jong Yop Bae ),김인철 ( In Cheol Kim ),조윤경 ( Yun Kyeong Cho ),박형섭 ( Hyoung Sub Park ),윤혁준 ( Hyuck Jun Yoon ),김형섭 ( Hyungseop Kim ),허승 대한내과학회 2015 대한내과학회지 Vol.89 No.2

Background/Aims: The mortality of hospitalized patients undergoing treatment with an intra-aortic balloon pump (IABP) due to cardiogenic shock is well known as quite high. The aim of this study was to evaluate the outcome of percutaneous coronary intervention (PCI) with an IABP in patients with acute coronary syndrome (ACS) and cardiogenic shock and identify the predictors of in-hospital mortality. Methods: 134 patients who underwent PCI with IABP due to ACS complicated by cardiogenic shock were consecutively enrolled. Outcomes were obtained and analyzed during hospitalization and after 1 year. Results: The incidence of all-cause mortality was 35.8% (in-hospital mortality, 34.3%, 1-year mortality, 1.5%). The nonsurvival group exhibited higher peak levels of creatine kinase MB, lower ejection fractions, and higher incidences of ST elevation myocardial infarction, ventricular arrhythmia, and use of an assistive device than did the survival group. Aging (hazard ratio 2.839, 95% confidence interval 1.408-5.723, p = 0.004), the use of a temporary pacemaker (2.035, 1.114-3.720, 0.021), the use of a mechanical ventilator (4.376, 1.852-10.341, 0.001), and the performance of cardiopulmonary resuscitation (CPR) (2.219, 1.017-4.839, 0.045) were independent predictors for in-hospital mortality. However, out-of-hospital mortality among in-hospital survivors was not affected by predictors of in-hospital mortality. Conclusions: The incidence of in-hospital mortality was high, as expected in patients undergoing PCI with IABP due to ACS with cardiogenic shock. Aging, CPR, and additional procedures such as pacemaker use and mechanical ventilation were predictors of in-hospital mortality. However, the patients who were successfully discharged after the complex procedure showed acceptable 1-year outcomes. (Korean J Med 2015,89:186-191)

Feasibility and Effects of a Postoperative Recovery Exercise Program Developed Specifically for Gastric Cancer Patients (PREP-GC) Undergoing Minimally Invasive Gastrectomy

Cho, In,Son, Younsun,Song, Sejong,Bae, Yoon Jung,Kim, Youn Nam,Kim, Hyoung-Il,Lee, Dae Taek,Hyung, Woo Jin The Korean Gastric Cancer Association 2018 Journal of gastric cancer Vol.18 No.2

Purpose: Exercise intervention after surgery has been found to improve physical fitness and quality of life (QOL). The purpose of this study was to investigate the feasibility and effects of a postoperative recovery exercise program developed specifically for gastric cancer patients (PREP-GC) undergoing minimally invasive gastrectomy. Materials and Methods: Twenty-four patients treated surgically for early gastric cancer were enrolled in the PREP-GC. The exercise program comprised sessions of In-hospital Exercise (1 week), Home Exercise (1 week), and Fitness Improvement Exercise (8 weeks). Adherence and compliance to PREP-GC were evaluated. In addition, body composition, physical fitness, and QOL were assessed during the preoperative period, after the postoperative recovery (2 weeks after surgery), and upon completing the PREP-GC (10 weeks after surgery). Results: Of the 24 enrolled patients, 20 completed the study without any adverse events related to the PREP-GC. Adherence and compliance rates to the Fitness Improvement Exercise were 79.4% and 99.4%, respectively. Upon completing the PREP-GC, patients also exhibited restored cardiopulmonary function and muscular strength, with improved muscular endurance and flexibility (P<0.05). Compared to those in the preoperative period, no differences were found in symptom scale scores measured using the European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life Questionnaire (QLQ-C30) and Quality of Life Questionnaire-Stomach Cancer-Specific Module (QLQ-STO22); however, higher scores for global health status and emotional functioning were observed after completing the PREP-GC (P<0.05). Conclusions: In gastric cancer patients undergoing minimally invasive gastrectomy, PREP-GC was found to be feasible and safe, with high adherence and compliance. Although randomized studies evaluating the benefits of exercise intervention during postoperative recovery are needed, surgeons should encourage patients to participate in systematic exercise intervention programs in the early postoperative period (Registered at the ClinicalTrials.gov, NCT01751880).

클러스터형 VOD서버에서 고가용성을 고려한 자체 복구 시스템

이좌형,서동만,방철석,김병길,정인범 강원대학교 정보통신연구소 2004 정보통신논문지 Vol.8 No.-

While clustered VOD (Video On Demand) servers that have been proposed for building large-scale VOD system recently, have the advantages of high availability and scalability, the system level reliability of the clustered VOD servers could be decreased by adding more servers to scale up the capacity of the server. To alleviate this reliability problem and support server-level fault tolerance, this paper proposes and analyzes self recovery system based on RAID-3 and 4 with pipelining concept. The proposed self recovery system could increase the efficiency of the disk by accessing the disk with large size block as in RAID-4. The network resource could be used efficiently and the workload of memory could be decreased by sending data in small size block as in RAID-3. By introducing pipeline concept, the recovery tasks are processed at several nodes in parallel so that the workload in CPU, network, and memory could be distributed to several nodes.