Yu Seon Kim;Joomin Aum;Bo Hyun Kim;Myoung Jin Jang;Jungyo Suh;Nayoung Suh;Dalsan You
International Journal of Stem Cells
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v.16
no.2
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pp.168-179
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2023
Background and Objectives: We evaluated the effect of adipose-derived stem cell-derived conditioned medium (ADSC-CM) on the renal function of rats with renal ischemia-reperfusion injury (IRI)-induced acute kidney injury. Methods and Results: Forty male Sprague-Dawley rats were randomly divided into four groups: sham, nephrectomy control, IRI control, ADSC-CM. The ADSC-CM was prepared using the three-dimensional spheroid culture system and injected into renal parenchyme. The renal function of the rats was evaluated 28 days before and 1, 2, 3, 4, 7, and 14 days after surgical procedures. The rats were sacrificed 14 days after surgical procedures, and kidney tissues were collected for histological examination. The renal parenchymal injection of ADSC-CM significantly reduced the serum blood urea nitrogen and creatinine levels compared with the IRI control group on days 1, 2, 3, and 4 after IRI. The renal parenchymal injection of ADSC-CM significantly increased the level of creatinine clearance compared with the IRI control group 1 day after IRI. Collagen content was significantly lower in the ADSC-CM group than in the IRI control group in the cortex and medulla. Apoptosis was significantly decreased, and proliferation was significantly increased in the ADSC-CM group compared to the IRI control group in the cortex and medulla. The expressions of anti-oxidative makers were higher in the ADSC-CM group than in the IRI control group in the cortex and medulla. Conclusions: The renal function was effectively rescued through the renal parenchymal injection of ADSC-CM prepared using a three-dimensional spheroid culture system.
To study the regulation of amniotic fluid volume and electrolyte concentration by the Membranes surrounding the amniotic fluid, the rate of $Li^+$ disappearance from amniotic sac of expired fetuses were examined while increasing the amniotic volume and osmolarity in rabbits. After intraamniotic injection of 1 ml isosmotic saline (about 20% of the amniotic fluid volume) containing 15 mM LiCl and 0.5 g/L Censored, the time courses of $Li^+$ and Censored disappearance were determined. From there the $Li^+$ clearance through the extrafetal routes was estimated and compared with that obtained from living fetuses. The volume, $Na^+$ concentration and osmolarity of amniotic fluid were measured and their relationships with $Li^+$ disappearance were evaluated. The fellowing results were obtained: 1. The rate of disappearance from amniotic fluid of living fetuses during the first 30 minutes was strikingly higher for $Li^+$ than for Censored, suggesting that extrafetal routes exist. At 60 and 90 minutes, however, the disappearance rate of $Li^+$ was less than that of Censored, suggesting the possibility of $Li^+$ reentry through fetal urination. 2. The disappearance of $Li^+$ from the amniotic fluid of the expired fetus was substantial, although lower than that of living fetuses, throughout the experimental period. 3. The $Na^+$ concentration and the osmolarity of the amniotic fluid of expired fetus measured 30 minutes after an intraamniotic injection of isoosmotic saline showed wide variation, but thereafter they changed gradually towards the normal extracellular fluid level. 4. When the amniotic fluid was iso- or hyposmolar, the rate of $Li^+$ disappearance from the amniotic fluid of the expired fetuses showed little variation. However, when the amniotic fluid was hyperosmolar, the rate at 30 minutes was markedly lower than those of isosmotic or hyposmotic amniotic fluid. At 90 minutes, the rate of $Li^+$ disappearance in hyperosmolar fluid reached a similar level to the rate in isosmolar fluid. 5. The intraamniotic injection of 400 mOsm/L saline solution decreased the disappearance rate of $Li^+$ from expired fetuses, while the injection of mannitol into the maternal vein induced no significant change. From these results it is concluded that: 1) a significant amount of $Li^+$ may leave the amniotic fluid via filtration through the membranes surrounding the amniotic fluid, 2) during hyperosmolar challenge to amniotic fluid, osmotic bulk flow might counteract the filterable loss, and 3) $Li^+$ disappearance might continue even after the volume and osmolarity of the amniotic fluid have recovered to control values.
Lin, Chunmei;Jeong, Ju-Yeon;Yon, Jung-Min;Park, Seul Gi;Gwon, Lee Wha;Lee, Jong-Geol;Baek, In-Jeoung;Nahm, Sang-Soep;Lee, Beom Jun;Yun, Young Won;Nam, Sang-Yoon
Korean Journal of Veterinary Research
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v.57
no.2
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pp.105-111
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2017
Hyaluronic acid (HA) has been investigated for biomedical and pharmaceutical applications. This study was conducted to determine the distributions of HA nanoparticles (NPs; size 350-400 nm) and larger HA polymers in mice at intervals after application. $^{177}Lutetium$ (Lu)-labeled HA-NPs or HA polymers were intravenously injected (5 mg/kg) into male ICR mice, and radioactivity levels in blood and target organs were measured from 0.25 h to 28 days post-injection. In blood, the radioactivities of HA-NPs and HA polymer peaked at 0.5 h after injection but were remarkably decreased at 2 h; subsequently, they maintained a constant level until 6 days post-injection. HA-NPs and HA polymers were observed in the liver, spleen, lung, kidney, and heart (in ascending order) but were seldom observed in other organs. After 3 days, both the HA-NP and HA polymer levels showed similar steady decreases in lung, kidney, and heart. However, in liver and spleen, the HA-NP levels tended to decrease gradually after 1 day and both were very low after 14 days, whereas the HA polymer level accumulated for 28 days. The results indicate that HA-NPs, with their faster clearance pattern, may act as a better drug delivery system than HA polymers, especially in the liver and spleen.
The purpose of this study were to analyze the home care services and to evaluate the client's satisfaction with the home care services provided by home care service center in the C hospital. The data were collected by reviewing charts of 128 home care clients who were receiving home care services at C hospital from October 1997 to September 2000. The subjects for satisfaction of home care service were 20 clients from July 10 to September 30, 2000. The tool for measurement of present condition of home care service was developed by the researchers. The satisfactions of the home care services were measured by using the instrument developed by Im(997). The data were analyzed by using the SPSS/PC+. The results of this study were as followings : 1. Majority of the subjects was female(61.7%). The average of age was 63.5 years. The service has been used mostly by the elderly 60 years of age or older(71.1%). The economic level of most of subjects was in middle class(94.5%). 2. Majority of the subject had a cancer(55.4%), following stroke(25.0%). The average duration of disease for the subjects was 31 months. The average time of hospitalization for the subjects was 3.3 times. The duration of hospitalization was 10$\sim$30 days(26.6%), 30$\sim$60 days(23.4%) and above of the 210 days(9.4%). 3. Most of the subjects used his/her doctor (47.7%), as a consultant, following his/her nurse (28.1%), other patients or their family (21.9%). Most of reasons for a consultation were supportive management(Infusion or medication, 60.94%), following tube management(L-tube or T-tube, 25%), Foley catheter management (15.63%) etc. 4. 28 types of nursing diagnoses were used by the home care service. The nursing diagnosis altered nutrition: less than body requirement were used mostly by the home care service, following risk for infection, impaired skin integrity, impaired swallowing, ineffective airway clearance altered comfort: pain, impaired physical mobility. By the human-response pattern, exchanging(63.2%), moving(7.5%), feeling(10.4%), knowing(5.2%), communicating (2.6%), relating(0.5%) perceiving(0.4%) and choosing(0.3%). There were 42 nursing intervention types were performed by the home care service. By the NIC(nursing intervention classification. McCloskey. Bulech. 1996). physiologic: complex (30.3%) was the most, safety(28.3%), behavioral(20.0%), physiologic: basic(10.8%) and health system(1.7%). Observation or assessment was the most nursing intervention performed by the home care service. following IV infusion. vital sign observation. infusion management and fluid-electrolyte balance management. 5. The level of client's satisfaction with provided home care services showed considerably high(2.67/ 3).
Sohn Eun Jin;Kang Dae Gill;Lee An Sook;Lee Yun Mi;Yin Ming Hao;Yeum Kee Bok;Noh Suk Yun;Lee Ho Sub
Journal of Physiology & Pathology in Korean Medicine
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v.17
no.2
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pp.542-548
/
2003
The present study was aimed to investigate whether glycyrrhizin, which is the major component of Glycyrrhiza uralensis, has an antioxidant effect and regulatory effect on Na,K-ATPase in gentamicin-induced acute renal failure (ARF) rats . It is well known that reactive oxygen species (ROS), such as superoxide anion and hydroxyl radical, are main pathophysiological factor in gentamicin-induced ARF. Glycyrrhizin showed potent in vitro antioxidant activity, especially superoxide scavenging activity, in a dose-dependent manner. Plasma lipid peroxide level was restored to normal level by oral administration of glycyrrhizin (200 mg/kg) in the gentamicin-induced ARF rats. The expression of Na,K-ATPase α1 subunit was restored in the gentamicin-induced ARF rats by administration of glycyrrhizin, whereas β1 subunit was not restored. The renal functional parameters including urine volume, cleatinine clearance, urine osmolality, solute-free water reabroption were also partially restored in gentamicin-ARF rats by administration of glycyrrhizin. Taken together, the amelioration of renal functions and the expression of sodium pump by administration of glycyrrhizin in the gentamicin-induced ARF was appear to be mediated by the scavenging of ROS.
High-dose aprotinin(Hammersmith regimen) has been widely used for years to control postoperative bleeding and reduce blood consumption in cardiac surgery but had known to cause some side-effects and had disadvantage in cost-effectiveness. The prospective controlled study of 33 patients undergoing cardiopulmonary bypass was performed to evaluate the efficacy for reducing postoperative bleeding and unfavorable effects of low-dose aprotinin. The level of hemoglobin and platelet in the blood and the amount of postoperative bleeding were assessed preoperatively, and postoperatively for the study of hemostatic function. The level of BUN and serum creatinine in the blood, levels of urine creatinine, total protein, albumin, alpha-1-microglobulin and creatinine clearance were assessed before and after the operation for the study of renal function. The aprotinin group had a significant reduction in chest tube drainage; 243$\pm$ 123 ml versus 406$\pm$303 ml(P=0.037) during 6 hours immediate-postoperatively, 494$\pm$358 ml versus 869$\pm$570 ml(P=0.045) during 24 hours postoperatively. The ratio of alpha-1-microglobulin/creatinine and microalbumin/creatinine in the urine were slightly increased in the aprotinin group postoperatively in comparison with the control group but there were no statistically significant difference(55$\pm$23 versus 24$\pm$10 in the alpha-1-microglobulin/creatinine, 56$\pm$19 versus 38$\pm$25 in the microalbumin/creatinine at post- operative 3rd day). There were no significant difference between two groups in other parameters of renal function, too. This study showed that low-dose aprotinin is an effective means of reducing postoperative bleeding without inducing significant renal dysfunction.
Kim, Jaehyun;Ryu, Seo-Yoon;Cheong, Cheolung;Jang, Donghyeok;An, Mingi
The Journal of the Acoustical Society of Korea
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v.37
no.6
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pp.396-403
/
2018
In this paper, a high-performance and low-noise centrifugal fan is developed for cooling automotive seats which provide a driver with pleasant driving environment. First, the flow characteristics of the existing fan unit was analyzed using a fan performance tester and CFD (Computational Fluid Dynamics) simulations. The analysis of the predicted flow field indicated vortex flow near the tip of fan hub and stagnation flow on the top of fan hub. Two design points are devised to reduce the vortex flow and the stagnation flow observed in the existing fan unit. First, the cut-off clearance which is the minimum distance between the fan blade and the fan housing is increased to reduce the vortex strength and, as a result, to reduce the overall sound pressure level. Second, the hub shape is more modified to eliminate the stagnation flow. The validity of proposed design is confirmed through the numerical analysis. Finally, a prototype is manufactured with a basis on the numerical analysis result and its improved flow and noise performances are confirmed through the P-Q curves measured by using the Fan Tester and the SPL (Sound Pressure Level) levels measured in the anechoic chamber.
Purpose: To evaluate the long-term therapeutic efficacy and durability of lamivudine in Korean children with chronic hepatitis B. Methods: A total of 48 children (31 male and 17 female; age, 1~18 years, mean, 8 years) with chronic hepatitis B who received lamivudine for at least six months from March 1999 to September 2004 were followed for a mean period of 29 months (8~66 months) at Department of Pediatrics, Kyungpook National University Hospital in Korea. Response to treatment was defined as the normalization of ALT and HBV DNA levels, and HBeAg seroconversion after the initiation of treatment. Results: Twenty nine (60%) among the 48 children treated with lamivudine responded and nine (19%) children lost HBsAg during therapy. ALT and HBV DNA level had normalized in 94% one year after the initiation of treatment. Kaplan-Meier estimates of cumulative HBeAg seroconversion rates over the years were 13% (0.5 year), 34% (1 year), 50% (1.5 years), 68% (2 years), 79% (2.5 years) and 90% at 3 years respectively. Above all, among the 22 children treated before the age of seven, loss of HBsAg occurred in eight (36%), which showed superior rate of HBsAg loss (p=0.002 vs age >7). Conclusion: Long-term treatment of lamivudine improved the rate of HBeAg seroconversion in Korean children with chronic hepatitis B. After three years' observation, most of treated children have sustained HBeAg clearance. We believe that lamivudine should be tried as the first therapeutic option for children with chronic hepatitis B in immune clearance phase.
Purpose: To provide the primary data for reaching a consensus on the adequate duration of treatment of lamivudine in children with HBeAg negative chronic hepatitis B. Methods: Seven of 83 children/adolescents with chronic hepatitis B were diagnosed with HBeAg-negative and HBV DNA-positive chronic hepatitis B and treated with lamivudine. Six children/adolescents were enrolled among 7 patients, who had been treated with lamivudine over 2 years. The primary goal of treatment was HBV DNA clearance and normalization of the serum ALT level; the final goal of treatment was the durability of the complete response after discontinuation of lamivudine. It was planned to continue lamivudine for more than two additional years after HBV DNA negativity and normalization of ALT. Results: The mean duration of lamivudine treatment was 32.2 months (range, 26~40 months) and the mean duration of follow-up was 59.5 months (range, 26~110 months). HBV DNA levels became undetectable (<0.5 pg/mL) in 6 patients within 3 months of treatment. ALT levels were normalized in 3.5 months (range, 2~7 months) in all 6 patients. Biochemical breakthrough developed in 1 patient 18 months after the initiation of lamivudine treatment. No evidence of relapse could be found in 4 patients with a mean follow-up of 23.8 months (range, 4~75 months) after cessation of lamivudine treatment. Conclusion: Suppression of HBV replication and normalization of serum ALT levels were effectively achieved with long-term lamivudine treatment in children/adolescents with HBeAg-negative chronic hepatitis B. Two additional years of lamivudine may be needed after HBV DNA clearance and ALT normalization in HBeAg-negative chronic hepatitis B in order to decrease the relapse rate.
Objectives In this study, we investigated the clinical effect of Imoyongsutang and Imoyongsutang plus Maduryong on the viscosity of mucin solution, the instantly type allergy, the delayed type allergy, the carbon clearance, the pulmonary thromboembolism for the lung damaged rats and mice. Methods The gastric mucin and incubation time, pulmonary thromboembolism induced by sodium arachidonic acid, the pulmonary thromboembolism induced by ADP, vascular permeability response, non inhibitory effects, the delayed type hypersensitivity response to picryl chloride, serum $Na^+$ level, $K^+$ and $Cl^-$ level, ${\alpha}-index$ in phagocytic activity were measured. Results 1. Both the solid extracts of Imoyongsutang and Imoyongsutang plus Maduryong gave some high significance results on the gastric mucin and incubation time on the viscosity of mucin solution in rats, and both groups had similar result. 2. Both the solid extracts of Imoyongsutang and Imoyongsutang plus Maduryong were revealed feeble effect on the pulmonary thromboembolism induced by sodium arachidonic acid in mice, and both groups had similar result. 3. Both the solid extracts of Imoyongsutang and Imoyongsutang plus Maduryong were revealed feeble effect on the pulmonary thromboembolism induced by ADP in mice, and after medication, the value was increased than the before one. 4. Both the solid extracts of Imoyongsutang and Imoyongsutang plus Maduryong were recognized. significance on vascular permeability response induced by histamine in rats. And the significance of the Imoyongsutang plus Maduryong is rather higher than that of Imoyongsutang. 5. The extract of Imoyongsutang recognized no significance symptoms on vascular permeability response induced by serotonin in rats, but the solid extract of Imoyongsutang plus Maduryong resulted recognized significance. 6. Both the solid extracts of Imoyongsutang and Imoyongsutang plus Maduryong were revealed non inhibitory effects on the 48 hour homologous PCA in rats provoked by the IgE-like antibody against the egg albumin. 7. Both the solid extracts of Imoyongsutang and Imoyongsutang plus Maduryong were remarkably revealed inhibitory effect on the delayed type hypersensitivity response to picryl chloride in mice. And the significance of the latter is rather higher than that of the former. 8. The solid extract of Imoyongsutang was revealed inhibitory eects on the delayed type hypersensitivity response to SRBC in mice, but thffe solid extract of Imoyongsutang plus Maduryong recognized significance. 9. The solid extract of Imoyongsutang was recognized significance on the lung TBA value of $O_3$ intoxicated rats, but the solid extract of Imoyongsutang plus Maduryong recognized no significance. 10. Both the solid extracts of Imoyongsutang and Imoyongsutang plus Maduryong was recognized significance on serum $Na^+$ level in $O_{3}-intoxicated$ rats. And the significance of the latter is rather higher than that of the former. 11. Both the solid extracts of Imoyongsutang and Imoyongsutang plus Maduryong were revealed non inhibitory effects on serum $K^+$ and $CL^-$ level $O_{3}-intoxicated$ Rats 12. The solid extracts Imoyongsutang was recognized significance on K-index in phagocytic activity in mice, but the solid extract of Imoymgsutang plus Maduryong recognized no significance. 13. The solid extract Imoyongsutang was recognized on significance on ${\alpha}-index$ in phagocytic activity in mice. but the solid extract of Imoyongsutang plus Maduryong recognized significance. Conclusions According to the above findings, it is suggested that the sold extract of Imoyongsutang and Imoyongsutang plus Maduryong were revealed effects on asthma cough or dyspnea caused by the abnormal rising of lung-allergy and throat discomfort so that they retain effectiveness on the instantly and delayed type allergy, the pulmonary thromboembolism and the lung damages in rats and mice.
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