Background: The cyclin D1 gene is one of the most frequently amplified chromosomal regions(11q13) in human carcinomas. In laryngeal and head and neck carcinomas, its overexpression has been shown to be associated with advanced local invasion and presence of lymph node metastases. Cyclin D1 may therefore playa key role in cell growth regulation and tumorigenesis. Lung cancer is a worldwide problem and in many contries it is the most lethal malignancy. As relapse is frequent after resection of early stage non-small cell lung cancer, there is an urgent need to define prognostic factors. Purpose: This study was undertaken to evaluate the prognostic value of the cyclin D1, that is one the G1 cyclins which control cell cycle progression by allowing G1 to S phase transition, on the patients in radically resected non-small cell lung cancer. Method: Total 81 cases of formalin-fixed paraffin-embedded blocks from resected primary non-small cell lung cancer from January 1, 1983 to July 31, 1995 at Hanyang University Hospital were available for both clinical follow-up and immunohistochemical staining using monoclonal antibodies for cyclin D1. Results : The histologic classification of the tumor was based on WHO criteria, and the specimens included 45 squamous cell carcinomas, 25 adenocarcinomas and 11 large cell carcinomas. Cyclin D1 overexpression was noted in 26 cases of 81 cases tested (30.9%). Cyclin D1 expression was not significantly associated with cell types of the tumor, pathological staging and the size of the tumor. But cyclin D1 overexpression was significantly correlated with positive lymph node metastasis(p=0.035). The mean survival duration was $22.76{\pm}3.50$ months in cyclin D1 positive group and $45.38{\pm}5.64$ months in eyclin D1 negative group. There was a nearly significant difference in overall survival between cyclin D1 positive and negative groups(p=0.0515) in radically resected non-small cell lung cancer. Conclusion: Based on this study, cyelin D1 overexpression appears an important poor prognostic indicator in non-small cell lung cancer and may have diagnostic and prognostic importance in the treatment of resectable non-small cell lung cancer.
Background: Tissue-type plasminogen activator is a physiologic activator, which has high affinity for fibrin and is activated by fibrin. Because of these properties, t-PA has the potential to induce effective thrombolysis without producing a systemic lytic state. In practice, however, therapeutically efficacious doses of t-PA has been associated with the development of a systemic lytic state. As experience with t-PA has accumulated, it has suggested that the fibrin selectivity is influenced by the dose and duration of t-PA infusion, and many studies have performed in an attempt to optimize the duration of t-PA regimen. Methods: This study was designed to assess the thrombolytic efficacy of t-PA and the differences of two dosing regimens of t-PA (infusion of 1 mg/kg t-PA over 15 or 180 minutes) in a canine model of pulmonary embolism, induced by injection of radioactive autologous blood clots. By continuously counting over both lung fields with a external gamma counter, we correlated rate and extent of pulmonary thrombolysis with corresponding pulmonary hemodynamics in addition to the gas analyses of arterial and mixed venous blood. Results: 1) While total clot lysis was similar ($36.2{\pm}3.3%$ and $39.6{\pm}2.3%$ respectively, p>0.05) when t-PA was infused over 15 or 180 minutes, the rate of lysis during infusion was markedly increased with the shorter infusion ($81.4{\pm}16.8%/hr$ vs $37.3{\pm}2.4%/hr$, p<0.05). 2) The duration of thrombolysis was $63.3{\pm}22.2$ minutes although t-PA was administered over 15 minutes, and it was only $148.5{\pm}14.0$ minutes in case of the infusion over 180 minutes (p<0.05). 3) The increased rate of thrombolysis with the shorter infusion was accompanied by a faster amelioration of cardiopulmonary impairment from pulmonary embolism (p<0.05). Conclusion: It is concluded that the shorter (15 minutes) infusion of t-PA is superior to the longer (180 minutes) infusion when the dose is equal, in consideration of the faster improvement in cardiopulmonary impairment from pulmonary embolism.
Journal of The Korean Society of Grassland and Forage Science
/
v.24
no.1
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pp.43-52
/
2004
This study was carried out to determine the effect of corn silage and roughage feeding systems on milk yield and milk compositions. The experimental design was allotted into 3 treatments according to the feeding systems of rice straw(rice straw+concentrate: T1), corn silage(corn silage + concentrate: T2) and TMR treatment(Total mixed rate : roughage + concentrate: T3). This research was carried out from Oct. 1988 to Mar. 1999 at Kimcheon Kyungbook. The results obtained were summarized as follows: 1. The milk yield increased upon T2(31.9$\pm$3.2kg) > T3(29.6$\pm$3.8kg) > T1 treatment(22.5$\pm$2.0kg)(P<0.05), but cows with T2 and T3 produced the highest at third parity while T1 at forth parity. 2. The milk fat percentage was the highest at T3 treatment(3.79$\pm$0.31%), and on the other hand T1 treatment appeared the lowest percentage. Cow at 2nd parity produced the highest milk fat contend over the other parity. 3. There was no significant difference in protein content between treatments and parity, but T2 and T3 were higher than T1 4. Treatment did not affact content of SNF even though T2 and T3 of the SNF revealed to higher than T1. T5 was T3(12.51$\pm$0.57%)>T1(11.71$\pm$0.62%)>T2 treatment(11.52$\pm$0.55%). These were not significant. 5. Somatic cell counts were the highest at T1(39.6 ${\times}$$10^4$cell/ml), but T2 treatment was the lowest as 28.7 ${\times}$$10^4$ cell/ml. These results indicates that com silage(T2) and TMR treatment(T3) could be recommended
The effect of liquid cultures of Cordyceps militaris (LCM) on weight gain, food intakes, food efficiency ratios, serum and hepatic lipids, fecal lipids excretion, serum protein and enzyme activities, were investigated in adult female rats (30 weeks old). Sprague-Dawley rats were assigned to one normal and four hyperlipidemic diet groups, Hyperlipidemic diet groups (20% fat, 1% cholesterol) were divided into high fat diet (LCM free water), 10%, 20% or 30% LCM diet groups (10%, 20% or 30% LCM in water) according to the levels of LCM supplementation. After 35 days of experimental diet consumption, the body weight gains, hepatic weights, and food efficiency ratios of the rats fed hyperlipidemic diets were significantly increased compared with those of the rats fed normal diet. The concentrations of serum and hepatic triglycerides, hepatic total lipid, and atherogenic index of the rats fed 20% or 30% LCM diets were significantly lower than those of the rats fed the high fat diet. The concentration of serum HDL-cholesterol of the rats fed all LCM diets was significantly higher than those of the rats fed the high fat diet. The fecal excretion of triglyceride in the rats fed 20% or 30% LCM diets was significantly higher than those of the rats fed high fat diet. The concentrations of serum and hepatic total cholesterol, serum LDL-cholesterol, and HDL-cholesterol/total cholesterol ratio, fecal excretion of cholesterol, and the activities of serum glutamic pyruvic transaminase and alkaline phosphatase of the rats fed all LCM diets were similar to those of the rats fed high fat diet. No differences were noted in the weights of kidney and femur, the serum concentration of glucose, total protein and albumin, and the activities of glutamic oxaloacetic transaminase and ${\gamma}$ -glutamyltranspeptidase, among the rats on all the experimental diets. These results showed that the 20% or 30% LCM diets feeding decreased the serum and hepatic triglycerides, and the atherogenic index, and increased the serum HDL-cholesterol of the adult female rats.
In this study, combined effect of airflow rate, $TiO_2$ concentration, solution pH and $Ca^{+2}$ addition on HA (humic acid) fouling in submerged, photocatalytic hollow-fiber microfiltraiton was investigated systematically. Results showed that UV irradiation alone without $TiO_2$ nanoparticles could reduce HA fouling by 40% higher than the fouling obtained without UV irradiation. Compared to the HA fouling without UV irradiation and $TiO_2$ nanoparticles, the HA fouling reduction was about 25% higher only after the addition of $TiO_2$ nanoparticles. Both adsorptive and hydrophilic properties of $TiO_2$ nanoparticles for the HA can be involved in mitigating membrane fouling. It was also found that the aeration itself had lowest effect on fouling mitigation while the HA fouling was affected significantly by solution pH. Transient behavior of zeta potential at different solution pHs suggested that electrostatic interactions between HA and $TiO_2$ nanoparticles should improve photocatalytic efficiency on HA fouling. $TiO_2$ concentration was observed to be more important factor than airflow rate to reduce HA fouling, implying that surface reactivity on $TiO_2$ naoparticles should be important fouling mitigation mechanisms in submerged, photocatalyic microfiltraiton. This was further supported by investigating the effect of $Ca^{+2}$ addition on fouling mitigation. At higher pH (= 10), addition of $Ca^{+2}$ can play an important role in bridging between HA and $TiO_2$ nanoparticles and increasing surface reactivity on nanoparticles, thereby reducing membrane fouling.
In order to properly define the terms such as soil, soil contamination, soil contamination site and remediation, which are the key terms under the Soil Environment Conservation Act(SECA) in Korea, we analyzed the legal definitions of the similar key words in legislations of the developed western countries. The selected countries were the United States of America, the United Kingdom, the Netherlands, Germany, and Denmark. The legal definitions of these keywords were very much diversified due to different levels of soil contamination, as well as different industrial, social, and legal backgrounds in each country. However, fair suggestions for definitions of the key terms in SECA were derived from the comparative analyses of these countries. First and foremost, SECA should provide a definition of 'soil' which includes a concept of the natural soil layer produced from soil mineralization processes. Groundwater and sublayer of the groundwater would. be excluded in the boundary of the soil with regards to the Groundwater Act of Korea. Definition of 'soil contamination' of SECA should include a concept of risk assessment(soil contaminants, pathway, and receptors), purpose of land use, and the acquired limitation levels of soil contaminants. Soil contamination activity either industrial or anthropogenic in SECA article2-1, could be substituted for a concept of soil risk assessment. Definition of 'soil contamination site' could derive from amalgamating the concepts of i) soil contamination in conjunction with contaminants, ii) risk assessment, iii) a concept of land use, and iv) knowing limitation of contamination site designation. Definition of 'remediation of contaminated site' should include the objective, intention, action, methodology and limit of the remediation. These suggested definitions would increase the efficacy of soil environment conservation policies, which includes the survey of the potentially contaminated area, remediation, and removal of the site.
Park, Mirye;Kim, Z-Hun;Nam, Seung Won;Lee, Sang Deuk;Yun, Suk Min;Kwon, Dae Ryul;Lee, Chang Soo
Microbiology and Biotechnology Letters
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v.48
no.2
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pp.205-214
/
2020
Cyanobacteria are microorganisms which have important roles in the nitrogen cycle due to their ability to fix nitrogen in water and soil ecosystems. They also produce valuable materials that may be used in various industries. However, some species of cyanobacteria may limit the use of water resources by causing harmful algal blooms in water ecosystems. Many culture collection depositories provide cyanobacterial strains for research, but their systematic preservation is not well-developed in Korea. In this study, we developed a method for the cryopreservation of the cyanobacteria Trichormus variabilis (syn. Anabaena variabilis), using alginate microcapsules. Two approaches were used for the experiments and their outputs were compared. One of the methods involved the cryopreservation of cells using only a cryoprotectant and the other used the cryoprotectant within microcapsules. After cryopreservation for 35 days, cells preserved with both methods were successfully regenerated from the initial 1.0 × 105 cells/ml to a final concentration of 6.7 × 106 cells/ml and 1.1 × 107 cells/ml. Irregular T. variabilis shapes were found after 14 days of regeneration. T. variabilis internal structures were observed by transmission electron microscopy (TEM), revealing that lipid droplets were reduced after cryopreservation. The expression of the mreB gene, known to be related to cell morphology, was downregulated (54.7%) after cryopreservation. Cryopreservation using cryoprotectant alone or with microcapsules is expected to be applicable to other filamentous cyanobacteria in the future.
Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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2004.05b
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pp.217-220
/
2004
According as utilization for web increases rapidly, it is demanded that model about support interaction between web-based applications systematically and solutions can integrate new distributed platforms and existing environment effectively, accordingly, Web Services appeared by solution in reply. These days, a lot of software and hardware companies try to adoption of Web Services to their market, attenpt to construct their applications associationing components from various Web Services providers. However, to execute Web Services completely. it must have interoperability and need the standardization work that avoid thing which is subject to platform, application as well as service and programming language from other companies. WS-I (Web Services Interoperability organization) have established Basic Profile 1.0 based on XML, UDDI, WSDL and SOAP for web services interoperability and developed usage scenario Profile to apply Web Services in practice. In this paper, to verify suitability Web Services interoperability between heterogeneous two applications, have design and implements the Book Information Web Services that based on the Web Services Client of J2SE platform and the Web Services Server of .NET platform, so that analysis and verify the service by adaptation of WS-I Basic Profile.
Purpose: The purpose of this study is to evaluate migration of technetium-99m hexamethylpropylene amine oxime ($^{99m}Tc$-HMPAO) labeled immature and mature dendritic cells (DC) in the mouse. Methods: DC were collected from bone marrow (BM) of tibiae and femurs of mice. Immature and mature DC from BM cells were radiolabeled with $^{99m}Tc$-HMPAO. To evaluate the functional and phenotypic changes of DC from radiolabeling, the allogeneic mixed lymphocyte reaction (MLR) and fluorescence-activated cell sorting (FACS) analysis were performed before and after labeling with $^{99m}Tc$-HMPAO. Migration of intravenously injected DC (iv-DC) was assessed by serial gamma camera images of mice with or without subcutaneous tumor. Percent injected dose per gram (%ID/g) was calculated in lungs, liver, spleen, kidneys, and tumor through dissection of each mice after 24 hours of injection. Results: Labeling efficiency of immature and mature DC were $60.4{\pm}5.4%\;and\;61.8{\pm}6.7%$, respectively. Iv-DC initially appeared in the lungs, then redistributed mainly to liver and spleen. Migration of mature DC to spleen was significantly higher than that of immature DC ($38.3{\pm}4.0%\;vs.\;32.2{\pm}4.1%$ in control group, $40.4{\pm}4.1%\;vs.\;35.9{\pm}3.8%$ in tumor group; p<0.05). Migration to tumor was also significantly higher in mature DC than in immature DC ($2.4{\pm}0.3%\;vs\;1.7{\pm}0.2%$; p=0.034). Conclusion: Assessment of migration pattern of DC in mice was possible using $^{99m}Tc$-HMPAO labeled immature and mature DC. Migration of mature DC to spleen and tumor was higher than that of immature DC when they were i.v. injected.
Purpose: Nicotinic acetylcholine receptors (nAChRs), which mediate excitatory neurotransmission, are known to participate in various neurophysiological functions. Severe losses of nAChRs have been noted in Alzheimer's and Parkinson's diseases. Therefore, noninvasive and quantitative imaging of nAChRs would offer a better understanding on the function of these receptors. In this study, $2-[^{18}F]fluoro-A85380\;([^{18}F]1)$, an ${\alpha}_4{\beta}_2$ nAChRs radioligand, was prepared using one HPLC purification and evaluated in mouse brain, and the results were compared with those in the literature. Materials and Methods: $[^{18}F]1$ was prepared by $[^{18}F]$fluorination of the iodo precursor followed by acidic deprotection and then purified by HPLC. Tissue distribution studies were performed in mouse brain at the indicated time points and the result was expressed as %ID/g. Inhibition studies were also carried out with pretreatment of various ligands. Results: One HPLC purification method gave the desired product in 15-20% radiochemical yield and with high specific activity ($38-55GBq/{\mu}mol$). Tissue distribution studies showed that $[^{18}F]1$ specifically labeled nAChRs in mouse brain with a high thalamus to cerebellum uptake ratio (13.8 at 90 min). Inhibition studios demonstrated selective binding of $[^{18}F]1$ to nAChRs, blocking the uptake of the $[^{18}F]1$ in nAChR-rich legions by selective ligands such as cytisine and nicotine which are well-known nAChRs agonists. Conclusion: This study demonstrated that the $[^{18}F]1$ produced by the method using one HPLC purification gave the results similar to those reported in the literature. Therefore, this synthetic method can be readily applied to the routine preparation of $[^{18}F]1$, a PET radioligand for ${\alpha}_4{\beta}_2$ nAChRs imaging.
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