Kim, Chang Won;Sung, Jae Hyuck;Kwon, Jeong Eun;Ryu, Hyeon Yeol;Song, Kyung Seuk;Lee, Jin Kyu;Lee, Sung Ryul;Kang, Se Chan
Toxicological Research
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제35권4호
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pp.371-387
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2019
Although the dried root of Saposhnikovia divaricata (Turcz.) Schischk. (Umbelliferae) is a popular medicinal plant in East Asia, there has been no systemic toxicological evaluation of a water extract of Saposhnikoviae Radix (SRE). In this experiment, an oral acute and 13-week subchronic toxicological evaluations of SRE (500-5,000 mg/kg body weight) were performed in both sexes of Crl:CD(SD) rats. Based on the results from mortality, clinical signs, effects on body weight and organ weight, clinical biochemistry, hematology, urinalysis, and histopathology, significant acute, 4-week repeated dose range finding (DRF) and 13-week subchronic toxicity of SRE was not observed in either sex of rats; thus, the no observed adverse effect level (NOAEL) was 5,000 mg (kg/day). To identify anti-hyperuricemia potential of SRE, the suppressive effect of SRE was determined in mice challenged with potassium oxonate (PO; 250 mg/kg) via intraperitoneal injection for 8 days (each group; n = 7). SRE supplementation suppressed the uric acid level in urine through significant xanthine oxidase (XO) inhibitory activity. Kidney dysfunctions were observed in PO-challenged mice as evidenced by an increase in serum creatinine level. Whereas, SRE supplementation suppressed it in a dose-dependent manner. Collectively, SRE was safe up to 5,000 mg (kg/day) based on NOAEL found from acute and 13-week subchronic toxicological evaluations. SRE had anti-hyperuricemia effect and lowered the excessive level of uric acid, a potential factor for gout and kidney failure.
TS-DP2 is a recombinant human granulocyte colony stimulating factor (rhG-CSF) manufactured by TS Corporation. We conducted a four-week study of TS-DP2 (test article) in repeated intravenous doses in male and female Sprague-Dawley (SD) rats. Lenograstim was used as a reference article and was administered intravenously at a dose of $1000{\mu}g/kg/day$. Rats received TS-DP2 intravenously at doses of 250, 500, and $1000{\mu}g/kg/day$ once daily for 4 weeks, and evaluated following a 2-week recovery period. Edema in the hind limbs and loss of mean body weight and body weight gain were observed in both the highest dose group of TS-DP2 and the lenograstim group in male rats. Fibro-osseous lesions were observed in the lenograstim group in both sexes, and at all groups of TS-DP2 in males, and at doses of TS-DP2 $500{\mu}g/kg/day$ and higher in females. The lesion was considered a toxicological change. Therefore, bone is the primary toxicological target of TS-DP2. The lowest observed adverse effect level (LOAEL) in males was $250{\mu}g/kg/day$, and no observed adverse effect level (NOAEL) in females was $250{\mu}g/kg/day$ in this study. In the toxicokinetic study, the serum concentrations of G-CSF were maintained until 8 hr after administration. The systemic exposures ($AUC_{0-24h}$ and $C_0$) were not markedly different between male and female rats, between the administration periods, or between TS-DP2 and lenograstim. In conclusion, TS-DP2 shows toxicological similarity to lenograstim over 4-weeks of repeated doses in rats.
Kwak, Do Hoon;Bae, Tae Hui;Kim, Woo Seob;Kim, Han Koo
Archives of Plastic Surgery
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제43권6호
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pp.491-497
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2016
Background Hypertrophic scarring is a pathological condition that occurs after trauma or surgery. Angiogenesis occurs more often with hypertrophic scarring than with normotrophic scarring. The regulation of angiogenesis is one of the key factors in hypertrophic scar management. Vascular endothelial growth factor (VEGF) is an essential factor in the angiogenetic response. This study investigated whether decreasing the level of VEGF is effective for treating hypertrophic scarring. Methods Ten 8-week-old female New Zealand white rabbits were included. Four defects were created on each ear by using a 6-mm punch. Bevacizumab (Avastin, Roche Pharma, Basel, Switzerland) was administered in one ear and normal saline was administered in the other ear. Treatment was administered starting on day 2, every 2 days, until day 14. The levels of VEGF were measured using enzyme-linked immunosorbent assay on day 10 and histologic results were analyzed on day 40. Results Bevacizumab induced-defects showed less hypertrophic scarring when compared with the control group as measured by the scar elevation index (SEI) and loose collagen arrangement. The SEI in the experimental group was $1.89{\pm}0.13$, compared to $1.99{\pm}0.13$ in the control group (n=30, P=0.005). Additionally, the VEGF level was lower ($38.72{\pm}11.03pg$ vs. $82.50{\pm}21.64pg$, n=10, P=0.001) and fewer vessels existed ($8.58{\pm}0.76$ vs. $7.2{\pm}1.20$, n=10, P=0.007). Conclusions Preventing excessive angiogenesis is effective for preventing scar formation, especially with hypertrophic scarring. Although it is not an approach that is sufficient alone for the management of scarring, it may be one of several important strategies for scar treatment.
Objectives : The purpose of this study was to identify the characteristics influencing consultation and waiting time in ambulatory patients. Methods : This study was conducted in a tertiary teaching hospital. Subjects were a total of 10,383 ambulatory patients. Consultation time was measured by time spent for meeting with his/her physician per patient. Waiting time was defined as the time difference between each patient's reserved time and time to meet with his/her physician for ambulatory care. Multiple regression analyses were performed to determine the factors influencing consultation and waiting time. Results : Consultation time was different according to patient' age, previous experience of clinic visit, recent admission history, medical department, specialist care, type of reservation, and day of the week. Significant factors influencing waiting time were patient' age, residential area, previous experience of clinic visit, recent admission history, medical department, specialist care, time spent after ambulatory care begins, and day of the week. Conclusions : The medical department was the strongest factor affecting both consultation time and waiting time. The ambulatory reservation management systems should take into account patient characteristics as well as care-related features.
This descriptive-correlational study was conducted to identify the major factors affecting health promoting behaviors. 344 workers who employed in four different manutacturing plants in Taegu and Kyungbuk area were selected by convenience sampling method. Data were collected from April let to April 18th, 1998 by ready structured questionaires. The purpose of this study was to offer the basic data for health promotion theory development and health promotion strategy planning. This study was based on Pender's Health Promotion Model and examined three variables health promoting behavior, self-concept and perceived importance of health. The Life Style and Health Habit Assessment scale(LHHA) developed by Pender(1982).The Self-concept scale developed by Choi(1972) and the Health Value scale developed by Wallston, Maides and Wallston(1980) were used for this study. Data was analyzed by percentage, mean. t-test. ANOVA, Pearson Correlation Coefficient, and Stepwise Multiple Regression. The major findings of this study are as follows ; 1. The average level of health promoting behavior practice was 63.2% and possible range was from 62 to 248 point. The mean score of respondent's positive self-concept was 75.8. 81.4% of respondents put a high priority on the importance of health. 2. There was a significant difference between the practice level in the category of general self care and less amount of working hours per day(P=0.000), less amount of working hours per week(P=0.000). There was a significant difference between the practice level in the category of nutrition and age(0.002), marital status(0.000), working hour per day(0.008), working hours per week(0.001), There was a significant difference between the practice level in the category of nutriton and sex(0.000), age(0.000), marital status(0.025), education level(0.000), working hours per day(0.002), working hours per week(0.006). There was a significant difference between the practice level in the category of sleep and rest and age(0.003), marital status(0.002), working hours per day(0.001), working hours per week(0.001). There was a significant difference between the practice level in the category of stress management and working hours per day(0.001), working hours per week(0.002). There was a significant difference between the practice level in the category of self-actualization and working hours per day(0.050). 3. General characteristics influencing the respodent's self-concept were level(P=0.009) and worksite(P=0.001). 4. The results of the hypothesis tests are as follows The first hypothesis, that "The respondent who have more positive self-concept will have higher scores in the practice of health promoting behavior." was supported(r=0.2973, P=0.0001). The second hypothesis that "The respondent who have higher perception level on importance of health will have higher scores in the practice health promoting behavior." was rejected(r=- 0665, P=0.2225). 5. The most important factor that affects health promoting behavior practice was working hours per week(6.0%). The combination of working hours per week, age, education level accounted for 10.0% of the variance in health promoting behavior. In conclusion, the results of this study on industrial workers supported Pender's health promotion model in partial and showed the relatedness between self concept and the practice of health promoting behavior. Further research is required to find factors influencing health promoting behaviors of industrial workers.
Hyun Sook Lee;So Mi Kim;Jae In Jung;Jihoon Lim;Moonjea Woo;Eun Ji Kim
Nutrition Research and Practice
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제17권2호
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pp.206-217
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2023
BACKGROUND/OBJECTIVES: The immunomodulatory effect of Platycodon grandiflorum (PG) has been reported, but studies on its mechanism are still lacking. This study was undertaken to confirm whether the hydrolyzed and fermented PG extract (HFPGE) obtained by adding hydrolysis and fermentation to the extraction process has an immune-enhancing effect in the in vivo system. MATERIALS/METHODS: Five-week-old BALB/c mice were divided into 4 groups: normal control group (NOR), control group (CON), 150 mg/kg body weight (BW)/day HFPGE-treated group (T150), and 300 mg/kg BW/day HFPGE-treated group (T300). The mice were administered HFPGE for 4 weeks and intraperitoneally injected with cyclophosphamide (CPA, 80 mg/kg BW/day) on day 6, 7, and 8, respectively, to induce immunosuppression. The levels of immunoglobulins (Igs) and cytokines were measured in the serum. In splenocytes, proliferation and cytokine levels were measured. RESULTS: Serum IgA, IgG, and IgM levels were observed to decrease after CPA treatment, which was recovered by HFPGE administration. The levels of serum interleukin (IL)-12, tumor necrosis factor (TNF)-α, IL-8, and transforming growth factor (TGF)-β were also decreased after exposure to CPA but increased after HFPGE administration. Decreased splenocyte proliferation was seen in CPA-treated mice, but was observed to increase in the T150 and T300 groups as compared to the NOR group. Compared to the CON group, splenocyte proliferation stimulated with concanavalin A (ConA) or lipopolysaccharide (LPS) in the HFPGE-treated groups was significantly increased. The cytokines secreted by ConA-stimulated splenocytes (IL-2, IL-12, interferon-γ, TNF-α) were increased in the T150 and T300 groups, and cytokines secreted by LPS-stimulated splenocytes (IL-4, IL-8, TGF-β) were also increased by HFPGE administration. CONCLUSION: These results suggest that HFPGE stimulates the immunity in immunosuppressed conditions, thereby enhancing the immune response. Therefore, it is expected that HFPGE has the potential to be used as functional food and medicine for immune recovery in various immunocompromised situations.
현대생활을 영위하는데 있어 자주 애용되는 교통수단인 버스는 실시간으로 정보를 제공해주고 있다. 이러한 BIS 정보 중 도착예정시간에 대한 신뢰성 높은 정보를 얻기 위해서는 교통 환경에 대한 주요 요인들에 대한 분석이 필요하다. 국내 지방자치단체별로 관리를 수행하는 만큼 지역별 정보 분석이 우선시 되어야 한다. 따라서 본 논문에서는 교육, 관광 및 배후도시에 대한 특성을 가지고 있는 순천시를 중심으로 출퇴근, 학교, 시장, 관광 및 기타 다른 영향에 의해 교통 환경에 영향을 미칠 것으로 예상되는 특징을 분석했다. 특징 분석을 위해 BIS에 수집되고 있는 DB 정보에 대한 데이터 정제를 수행했고, 요일별, 일별, 월별, 시간대별로 구분하여 교통흐름에 대한 주요요인에 대한 분석을 수행했다. 지방중소규모의 도시로서 버스전용차선이 운영되지 않는 지역인 순천은 교통흐름과 밀접한 관계를 갖는 버스에 대한 특징 분석을 통해 구간별 교통체증에 대한 분석이 가능할 것으로 예상된다. 또한, BIS의 실시간 정보 제공에 대한 주요요인을 적용하여 활용한다면 보다 신뢰성 있고 정밀한 정보를 제공할 수 있을 것으로 예상된다.
Pneumconiosis is a sort of pulmonary fibrosis consequent to the inhalation of the respirable dusts. Thus, the pathogenesis of silicosis have concentrated largely on the early response of alveolar macrophage and the later fibroblastic stimulation. But the role of the other cells and continuing cell injury in the pathogenesis has not been fully studied. And the chemical factors such as prostaglandin, fibroblast stimulating factor and inhibiting factor and chemotaxin are also participated in the mechanism of pulmonary fibrosis in silicosis. In order to clarify the role of alveolar cells and prostaglandin, we investigated the changes of the cellularities in bronchoalveolar lavage fluid and tissue pathology in the experimental silicosis with the time sequence. The experimental animals were divided into 3 groups; control group received only intratracheal injection of 0.5 ml saline, silica group received the intratracheal instillation of 40 mg silica with the same amount saline, and aspirin group received 450 mg/kg of aspirin after silica instillation. The results were as follows: 1) The total cells of bronchoalveolar lavage fluid in the silica group markedly increased in comparison with the control group, but there was no significant difference between the silica and aspirin groups. 2) The percentages of alveolar macrophages to the total number of cells in the silica group tended to be lower than those in the control group and also lower than those in the aspirin group at the 1st week after silica instillation. 3) The percentages of neutrophils to the total number of cells in the silica group were significantly higher than those in the control group during the entire period and also higher than those in the aspirin group at the 3rd day after silica instillation. 4) In the silica group, the percentages of lymphocytes to the total number of cells were increased 143 progressively with the time course and those were significantly higher than those in the control group from the 3rd week after silica administration. There were marked differences of lymphocyte percentages between the silica and aspirin groups at the 1st week after silica instillation. 5) The inflammatory change was observed in the rat lung at the 1st day after silica instillation. Also the silicotic nodule appeared in the silica group at the 1st week but we could not find out that nodule in the aspirin group at that time. The fibrotic changes in the rat lung tended to be increased progressively with the time course, therefore, the diffuse fibrotic pattern appeared in the whole field at the 20th week after silica instillation. 6) By the electron microscopy, there were gradual increases of phagosomes and vacuoles in the alveolar macrophage in the silica group as compared with the control group. These results suggest that the neutrophils and the lymphocytes have also participated in the pulmonary fibrosis even though the alveolar macrophage has a major role, and prostaglandin mediate the inflammation and pulmanary fibrosis in the experimental silicosis.
Objective : This study was aimed to investigated the correlation between the stroke incidence by day of the week and risk factors in acute stroke patients. Methods : From October in 2005 to October in 2007, 673 acute stroke patients wereincluded. Patients were hospitalized within 14 days after the onset of stroke in DongGuk University International Hospital, Kyungwon University In-cheon Oriental Medical Hospital or the Department of Cardiovascular and Neurologic Diseases (Stroke Center), Kyung Hee University Oriental hospital. We investigated general characteristics, stroke types, age group, educational backgrounds, medical history, lifestyle (the impact of stress, exercise, smoking and drinking) and Sasang constitution according to the stroke incidence by day of the week. Results : After examining each participants with day of the week, the order of days by incidence was Monday, Wednesday, Sunday, Saturday, Tuesday, Thursday and Friday respectively. Monday and Tuesday showed the highest ratio. As the aspect of demographic data of subjects, the group under 55 years and from 55 years to 70 years showed the highest ratio on Monday. In the group between 25 years to 55 years, the ratio, by the classification of actual productive age, was statistically higheron Monday. In addition, the ratio showed statistically higherby educational background, from elementary school to high school and over high school. In regard tothe medical aspect, incidence of cerebral hemorrhage showed higher ratio on Sunday, and incidence of brain infarction was higheron Monday. However, there was no difference of the past history between the two groups. With regard tothe aspect of lifestyle of subjects, the group with huge stress before the incidence of stroke showed a higher ratio of stroke incidence on Monday. Participants who didn't exercise regularly and participants who didn't smoke or drink showed higher ratio of stroke incidence on Monday. However, this was not important statistically. In regard to the aspect of Sasang constitution, Soeumin showed the highest ratio of stroke incidence on Wednesday, Taeuminon Monday, and Soyangin on Saturday and Monday. Conclusion : According to these results, several cardiovascular risk factors affect stroke incidences on Monday. Further studies will be needed to help understand the correlation between stroke incidence by day of the week and risk factors in acute stroke patients.
Purpose - Yard inventories increase when export containers are carried into the terminal and decrease when import containers are delivered to the consigners. The purpose of this study is to analyze container inventories according to the weekly ship arrival pattern at container terminals. Research design, data, and methodology - As container ships operate according to weekly schedules based on shipping companies and their routes, specific terminals provide a fixed-day service in a week. Thus, yard inventories can change with weekly fluctuations. The data used in this study were the actualdata at specific container terminals. Result - The dwell times of each container at a terminal represent an important variable that affectsyard inventories. Even cargo flows are steady in a given period, if dwell times are prolonged, yard inventories increase. Conclusion - Dwell time is another factor causing yard inventory change. Therefore, the calculation for yard inventories should consider the weekly ship arrival patterns and dwell times of each container. Further, at the planning stage, dwell time should be more carefully considered to calculate yard capacity.
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