Choi, Seul Ki;Lee, Youngwon;Seo, Jung-eun;Park, Jong-eun;Lee, Jee-yeon;Kwon, Hoonjeong
Journal of Food Hygiene and Safety
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v.33
no.5
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pp.361-368
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2018
N-nitrosamines are probable or possible human carcinogens, which are produced by the reaction between secondary amines and nitrogen oxide in the acidic environment or by heating. Common risk assessment procedure involves the comparison between exposures expressed in the unit, mg/kg body weight/day and the Health-Based Reference dose expressed in the same unit. This procedure is suitable for the policy decision-making and is considered as inappropriate for the consumers to get information about their dietary decision-making. Therefore, the distributions of NDMA (N-nitrosodimethylamine), NDBA (N-nitrosodibutylamine), the six N-nitrosamines (NDMA, NDBA, NDEA (N-nitrosodiethylamine), NPYR (N-nitrosopyrrolidine), NPIP (N-nitrosopiperidine), and NMOR (N-nitrosomorpholine) in the menus grouped based on the presence of main ingredients and cooking methods were analyzed to generate consumer-friendly information regarding food contaminants. Recipes and intakes were taken from 2014 to 2016 KNHANES (The Korean National Health and Nutrition Examination Survey) and only the data from ages of 7 years or older were used. The contamination data were collected from the 2014~2016 Total Diet Study and all the analysis were performed using R software. Rockfish, eel, anchovy broth and pollock were mainly exposed to N-nitrosamines. In terms of cooking methods, soups and stews appeared to contain the highest amount of N-nitrosamines. Cereals, fruits, and dairy products in the ingredient categories, and rice dishes and rice combined with others in recipe categories had the lowest level exposure to N-nitrosamines. In case of N-nitrosamines, unlike other cooking related food contaminants, boiled dishes such as soups and stews and dishes mainly consisting of fishes and shellfishes had highest level of exposure, showing a large discrepancy with the previous thought of processed meat is the main source of N-nitrosamines.
Background : It has been reported that the expression of protein which influences on the cell cycle is significantly involved in the development, progress, treatment response, and survival of cancer, and also that the degree of expression of p27 and CDK4 is related to the prognosis. Recent research has revealed that uteroglobin, tumor suppressor gene, is related to cell cycle. This study is focused on the relations between expression of proteins related to cell cycle and clinical index of and survival of NSCLC. Methods : We examined immunohistochemically specimens of 110 surgically resected NSCLCs for expression of p27, CDK, Uteroglobin. Tissue array slide were obtained from 110 surgically resected NSCLCs. Immunohistochemical staining was performed by immuno-peroxidase technique using avidin-biotinylated horseradish peroxidase complex. Results : In 110 patients with resected NSCLCs, the ratio of male to female was 87:13, the median age was $56.43{\pm}9.41$ yrs. The positive staining of p27 was detected in 75% of the cases. A non-statistically significant trend toward increased p27 expression was observed in smoker and squamous cell cancer. The positive staining of CDK4 was detected in 89%, which was the highest expression of protein among 3 types. The survival ratio of CDK4 negative staining group was higher than that of positive staining group, which was significant diffrernce(P<0.05). There was no association between p27 or uteroglobin expression and survival. Conclusion : The expression degree of CDK4 is related to the prognosis. This findings suggests that the measurement of CDK4 may be useful in identifying patient at high risk for disease recurrence and survival.
Background: With the development of the molecular biological methods, studies of the early diagnosis of lung cancer and the detection in the preneoplastic state by using genetic probes in the high risk groups are widely investigated. In lung cancer, squamous cell carcinoma is considered to progress from the normal bronchial mucosa to the preneoplastic state, and finally to the invasive carcinoma. In this study, we investigated the expression of p53 and c-erbB2 in the normal bronchi and the cancer tissues in patients with squamous cell lung cancer to evaluate the possibility of using these immunohistochemical markers as the diagnostic and prognostic parameters of patients with squamous cell lung cancer. Method: The normal and cancerous bronchial tissues of 25 patients with squamous cell carcinoma of the lung, surgically resected from May 1995 to November 1996, were immunohistochemically stained with the monoclonal antibodies to p53(DAKO-p53) and c-erbB2(phamingen 15821A) respectively. We compared the expression status of these markers between the normal bronchial mucosa and the tumor tissue, and also investigated the relationship between the expression status of these markers in tumor tissues and the pathological stage, and the survival time. Results: The pathological stage was as follows; stage I, II were found in 5 patients respectively, stage IIIA was in 8 patients, stage IIIB was in 4 patients, and stage IV was in 3 patients. The expression rate of p53 in the squamous cell lung cancer was 48%, and it was not expressed in the normal bronchial mucosa. The expression status was increased as the pathological stage advanced(p=0.0091 by test of trend). But there were no relationship between the expression of p53 and the median survival time. C-erbB2 did not yield a significantly meaningful result. Conclusion: p53 was not found in the normal bronchial mucosa, but it was expressed in 48% of the tumor tissue. And the expression rate increased as the pathological stage advanced. So it would be helpful to apply the immunochistochemical stain with p53 in the bronchial biopsy specimen in the early diagnosis trial or staging of squamous cell lung cancer.
Rapid urbanization has elevated the risk of urban flooding due to the increase in the impervious surface, causing environmental disasters and environmental pollution problems, such as lowering the groundwater level and increasing water pollution. In Korea, low impact development (LID) techniques have been introduced to minimize these environmental impacts and maintain the water cycle soundness. However, most small-scale development projects are in blind spots because there is no legal basis for rainfall runoff management. Small-scale development projects that increase the surface runoff of rainwater are required to mandate the application of LID facilities in accordance with the polluters' responsibility principle. Therefore, it is necessary to implement a preliminary consultation system for water cycle recovery. This study focuses on the cost-benefit analysis on the application of LID techniques for small-scale development projects. The scale of nationwide small-scale development projects used for cost-benefit analysis were defined as buildings with a land area of more than 1,000 ㎡ or a total floor area of 1,500 ㎡. As a result of analyzing the cost-benefits from the installation of LID facilities, they were found to be much lower than the economic standard value of 1. This might be due to the high cost of facilities compared to the scale of the project. However, considering the overall environmental value of improving the water environment and air quality by the installation of LID facilities and the publicity of reducing the operating cost of sewage treatment facilities, the introduction of a prior consultation for small-scale development projects is inevitable. In the future, institutional and financial support from local governments is required to improve the cost-benefits with the introduction of a prior consultation for small-scale development projects.
This study reviews the relationship between son preference and fertility behavior, and infant and chlid mortality in the context of fertility and mortality decline. In Korea the situation reveals that fertility can decline to a very low level even in the presence of strong son preference, but son preference has certain effects on fertility and childhood mortality. The effect of son preference on fertility increased as the level of fertility declined. Our findings show that son preference causes excess female childhood mortality both directly and indirectly through fertility. Also, in Korea, the analysis reveals that female children suffer excessively high level of mortality and part of the excess mortality is due to parents' behavior on family building related to the effort to secure the birth of a son.
In order to resolve the problem of change in global climate which is worsening as days go by and to preemptively cope with strengthened restriction on carbon emission, the government enacted 'Framework Act on Low Carbon Green Growth' in 2010 and selected green technology and green industry as new national growth engines. For this reason, the necessity to use the un-utilized waste heat across the whole industrial system has become an issue, and studies on and applications of recycling in the agricultural and fishery fields such as cultivation of tropical crops and flatfishes by utilizing the waste heat and thermal effluent generated by large industrial complexes including power plants are being actively carried out. In this study, we looked into the domestic and overseas examples of having utilized waste heat abandoned in the form of power plant thermal effluent, and carried out economic efficiency evaluation of sturgeon aquaculture utilizing thermal effluent of Yeongwol LNG Combined Cycle Power Plant in Gangwon-do. In this analysis, we analyzed the economic efficiency of a model business plan divided into three steps, starting from a small scale in order to minimize the investment risk and financial burden, which is then gradually expanded. The business operation period was assumed to be 10 years (2012~2021), and the NVP (Net Present Value) and economic efficiency (B/C) for the operation period (10 years) were estimated for different loan size by dividing the size of external loan by stage into 80% and 40% based on the basic statistics secured through a site survey. Through the result of analysis, we can see that reducing the size of the external loan is an important factor in securing greater economic efficiency as, while the B/C is 1.79 in the case the external loan is 80% of the total investment, it is presumed to be improved to 1.81 when the loan is 40%. As the findings of this study showed that the economic efficiency of sturgeon aquaculture utilizing thermal effluent of power plant can be secured, it is presumed that regional development project items with high added value can be derived though this, and, in addition, this study will greatly contribute to reinforcement of the capability of local governments to cope with climate change.
Hur Won Joo;Youn Seon Min;Lee Hyung Sik;Yang Kwang Mo;Sin Geun Ho;Son Choon Hee;Han Jin Yeong;Lee Ki Nam;Jeong Min Ho
Radiation Oncology Journal
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v.18
no.4
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pp.314-320
/
2000
Purpose :To investigate whether changes in plasma concentrations of transforming growth factor-$\beta$1(TGF-$\beta$1), tumor necrosis factor-alpha (TNF-$\alpha$) and interleukin-6 (IL-6) could be used to identify the development of radiation-induced pneumonitis in the lung cancer patients. Methods and Materials :Seventeen patients with lung cancer (11 NSCLC, 6 SCLC) were enrolled in a prospective study designed to evaluate clinical and molecular biologic correlation of radiation-induced pneumonitis. The study began in May 1998 and completed in July 1999. All patients were treated with radiotherapy with curative intent : 1.8 Gy per day, 5 fractions per week. Serial measurements of plasma TGF-$\beta$1, TNF-$\alpha$ and IL-6 were obtained in all patients before, weekly during radiotherapy and at each follow-up visits after completion of treatment. These measurements were quantified using enzyme linked immunosorbent assay (ELISA). All patients were evaluated for signs and symptoms of pneumonitis at each follow-up visit after completion of radiotherapy. High resolution CT (HRCT) scans were obtained when signs and symptoms of pneumonitis were developed after completion of radiotherapy. Results : Thirteen patients eventually developed signs and symptoms of clinical pneumonitis 씬file four patients did not. TGF-$\beta$ 1 levels were elevated in all 13 patients with pneumonitis, which showed characteristic pattern of elevation (38.45 ng/ml at pretreatment, 13.66 ng/ml during radiotherapy, then 60.63 ng/ml at 2-4 weeks after completion of radiotherapy). The levels of TNF- $\alpha$ and IL-6 were also elevated In the group of patients who developed pneumonitis but the pattern was not characteristic. Conclusions : Changes in plasma TGF$\beta$-1 levels before, during and after radiotherapy appears to be a useful means by which to identify patients at risk for the development of symptomatic pneumonitis. Other cytokines like TNF- $\alpha$ and IL-6 shows no meaningful changes in association with radiation pneumonitis.
Purpose : The hematologic change during the treatment of acute lymphoblastic leukemia(ALL) is critical as a prognostic determinant and a variable to determine the dose of chemotherapeutic agents. It is known that the dose of vincristine used in the maintenance phase of ALL is small enough to increase the count of platelet. To investigate the change of platelet count according to the vincristine administration in maintenance phase of ALL chemotherapy, we performed this study. Methods : Eleven patients eligible under the criteria of Children's Cancer Study Group(CCG)-1882 and who had completed chemotherapy were enrolled in this study. The count of platelets before vincristine administration was compared with those of vincristine administration 1, 2 and 3 weeks after the early and last periods of maintenance phases. The platelet count before vincristine administration was defined as 100 percent and that after vincristine were compared. In addition, we tentatively defined an enhancing effect of vincristine as positive when the relative count was more than 120 percent. Results : Platelet count did not differ according to the early and last periods of maintenance phase. Platelet count at first week after vincristine administration increased more significantly than that before vincristine in early and last periods. There was an enhancing effect in 10(90.9 percent) of 11 patients after 1 week vincristine administration both in the early and last periods of the maintenance phase. Conclusion : Vincristine, used in ALL maintenance phases as a low dose, increased platelet count 1 week after administration. The increased platelet count resumed to the previous level 2-3 weeks later. However, the thrombocytosis observed in the maintenance phase by vincristine was not high enough to induce thrombosis. In addition, vincristine is known to reduce the activity of platelets. Therefore, the risk of thrombosis in the maintenance phase of ALL chemotherapy would be low.
Purpose : Several complications can occur in patients who received bone marrow transplantation (BMT) during childhood and adolescence. This study aims to investigate endocrine dysfunctions after BMT so that better care can be provided to care for long-term survivors of BMT. Methods : One hundred patients (61 males, 39 females) were included in this study. Clinical parameters such as initial diagnosis, age at BMT, conditioning regimen, presence of graft-versus-host disease (GVHD), growth pattern, thyroid function, and pubertal status were retrospectively reviewed to evaluate risk factors associated with endocrine dysfunction. Results : Height standard deviation score (SDS) at BMT, after 1 year of BMT, and at the last visit were $0.08{\pm}1.04$, $-0.09{\pm}1.02$, and $-0.27{\pm}1.18$, respectively (P =0.001). Height SDS significantly decreased in patients who received total body irradiation (TBI) (P =0.017). One of the patients who received TBI demonstrated growth hormone deficiency. Thirty (31.9%) of 94 patients had compensated hypothyroidism. Incidence of compensated hypothyroidism was higher among those who had GVHD (odds ratio 2.82, P =0.025). Of the 32 patients (17 males, 15 females) who were over 14 years in male and 13 years in female at the last visit, 16 (3 males, 13 females) had increased luteinizing hormone (LH) or follicle-stimulating hormone (FSH). Abnormal elevation of LH or FSH was more common in females (odds ratio 30.3, P =0.001). Conclusion : The most common endocrine dysfunction was ovarian insufficiency. Regular check-up for endocrine function needs to be required due to high incidence of endocrine dysfunction in patients with BMT.
Rhee, Jin Seol;Jang, Youn Bi;Choi, Ge Sun;Choung, Jai Jun;Kang, Seung Woo
Journal of the Korean Applied Science and Technology
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v.37
no.3
/
pp.448-462
/
2020
Dietary nutrition is a critical lifestyle factor that can reduce the risk of future cognitive impairments caused by dementia. Accumulating evidence suggests that dietary supplementation with Sulforaphane may help the prevention of cognitive impairments and dementia. Thus, Sulforaphane-enriched broccoli extract would hold promise to improve cognitive impairments of dementia patients. Here, we have used broccoli extracts, prepared from broccoli cultivated in Magma Seawater, to test if the broccoli extracts can be dietary supplement to improve cognitive impairments. Magma Seawater originated from Jeju Island, Korea is unique in terms of containing high concentrations of usable minerals (Zinc, Vanadium and Germanium etc.). Broccoli, grown in Magma Seawater, would contain Sulforaphane and the extra amount of usable minerals. The chemical compositions of the broccoli extracts were analyzed using LC-Q-orbitrap to detect Sulforaphane and Glucoraphanin. Analysis method based on HPLC was developed for measurement of sulforaphane levels in the broccoli extracts. We have tested if the broccoli extracts have anti-apoptotic and anti-inflammatory effects on neuron-like SH-SY5Y cells. In addition, we examined if the broccoli extracts are able to upregulate expression of synaptic plasticity-associated proteins (BDNF and phospho-CREB) and to inhibit acetylcholine esterase (AchE) activity. We have shown that the broccoli extracts inhibited the apoptotic pathway and inflammatory responses. Finally, we present evidence showing that AchE activity was inhibited by the broccoli extracts, but expression of BDNF and phospho-CREB was upregulated. Taken together, these findings suggest that the broccoli extracts from Magma Seawater-grown broccoli would be a good source of dietary nutrition to improve cognitive impairments in the future.
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