Kim, Hee-Seon;Song, Ok-Young;Kim, Kyung-Min;Lee, Sung-Soo;Young Hwangbo;Ahn, Kyu-Dong;Lee, Byung-Kook
Journal of Community Nutrition
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v.3
no.2
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pp.96-102
/
2001
A cross-sectional study was performed to estimate the nutritional status of Korean male lead workers and to assess the relationship between calcium nutritional status and blood lead levels. A flood consumption survey was conducted by the 24-hr recall method with 118 lead workers and 63 non-lead exposed controls. Blood lead levels were analyzed from whole blood and serum calcium concentrations were also assessed. Results of dietary analysis showed Korean lead workers consumed relatively sufficient nutrients (more than 75% of RDA) except, calcium. Mean dietary calcium intake of lead workers was 502.2mg(72% of RDA) while that of the non-lead workers was estimated as 600.8mg(86% of RDA). Intakes of protein, iron, niacin and vitamin C of lead workers were significantly lower than those of non-lead workers. There was a wide range of blood lead levels(5.5 to 73.5$\mu\textrm{g}$/㎗) observed while mean blood lead level of lead workers was 30.9$\mu\textrm{g}$/㎗. However, 98% of lead workers showed normal serum ca1cium concentrations (range ; 8.9 to 10.7mg/㎗, mean ; 9.77mg/㎗) while 66% of lead workers were estimated to intake a dietary calcium lower than 75% of RDA. Mean blood lead levels of non-1ead workers were significantly lower(mean ; 5.1$\mu\textrm{g}$/㎗, p < 0.001) and the serum calcium concentration was significantly higher(mean ; 10.20mg/㎗, p < 0.001) than lead workers. Results of unadjusted correlation showed that serum calcium level and dietary calcium intake were negatively correlated with blood lead concentration. In a multiple regression of blood lead levels with variables known as affecting blood lead 1eve1 such as age, body mass index and occupational lead exposure, serum calcium was insignificant while dietary calcium intake showed statistically significant(p < 0.05) relation. Since calcium is a very important nutrient to reduce hazardous effects of lead, it should be strongly recommended that lead workers need to increase dietary calcium intake.
A highly purified $(Na^+,\;K^+)-ATPase$ from the rectal gland of Squalus acanthias and from the electric organ of Electrophorus electricus has been used to raise antibodies in rabbits. The 97,000 dalton catalytic subunit and glycoprotein derived from the rectal gland of spiny shark were also used as antigens. The two $(Na^+,\;K^+)-ATPase$ holoenzymes and the two shark subunits were antigenic. In Ouchterlony double diffusion experiments, these antibodies formed precipitation bands with their antigens. Antibodies prepared against the two subunits of shark holoenzyme also formed precipitation bands with their antigens and shark holoenzyme, but not with eel holoenzyme. These observations are in good agreement with inhibitory effect of these antibodies on the catalytic activity of $(Na^+,\;K^+)-ATPase$ both from the shark and the eel, since there is very little cross-reaction between the shark anticatalytic subunit antibodies and the eel holoenzyme. The maximum antibodies titer of the anticatalytic subunit antibodies is found to be 6 weeks after the initial single exposure to this antigen. Multiple injections of the antigen increased the antibody titer. However, the time required to produce the maximum antibody titer was approximately the same. These antibodies also inhibit catalytic activity of $(Na^+,\;K^+)-ATPase$ vesicles reconstituted by a slow dialysis of cholate after solubilization of the enzyme in a presonicated mixture of cholate and phospholipid. In these reconstituted $(Na^+,\;K^+)-ATPase$ vesicles, effects of these antibodies on the fluxes of $Na^+$, $Rb^+$, and $K^+$ were investigated. Control or preimmune serum had no effect on the influx of $^{22}Na^+$ or the efflux of $^{86}Rb^+$. Immunized sera against the shark $(Na^+,\;K^+)-ATPase$ holoenzyme, its glycoprotein or catalytic subunit did inhibit the influx of $^{22}Na^+$ and the efflux of $^{86}Rb^+$. It was also demonstrated that these antibodies inhibit the coupled counter-transport of $Na^+$ and $K^+$ as studied by means of dual labeling experiments. However, this inhibitory effect of the antibodies on transport of ions in the $(Na^+,\;K^+)-ATPase$ vesicles is manifested only on the portion of energy and temperature dependent alkali metal fluxes, not on the portion of ATP and ouabain insensitive ion movement. Simultaneous determination of effects of the antibodies on ion fluxes and vesicular catalytic activity indicates that an inhibition of active ion transport in reconstituted $(Na^+,\;K^+)-ATPase$ vesicles appears to be due to the inhibitory action of the antibodies on the enzymatic activity of $(Na^+,\;K^+)-ATPase$ molecules incorporated in the vesicles. These findings that the inhibitory effects of the antibodies specific to $(Na^+,\;K^+)-ATPase$ or to its subunits on ATP and temperature sensitive monovalent cation transport in parallel with the inhibitory effect of vesicular catalytic activity by these antibodies provide direct evidence that $(Na^+,\;K^+)-ATPase$ is the molecular machinery of active cation transport in this reconstituted $(Na^+,\;K^+)-ATPase$ vesicular system.
Objectives : The purpose of this study is to investigate the effects of stress on psychosocial wellbeing at the time of an outbreak of Middle East respiratory syndrome(MERS) and to investigate the effect of resilience as a mediator on the relationship between stress and psychosocial wellbeing. Methods : Perceived Stress Scale, Psychosocial Wellbeing Index Short Form, and the Conner-Davidson Resilience Scale was implemented for 156 medical persons who worked at the hospital in which exposure to MERS cases had been confirmed and 127 ordinary people. We conducted a Pearson correlation coefficient and a hierarchical multiple regression to confirm the effect of stress on psychosocial wellbeing and the mediating effect of resilience between stress and psychosocial wellbeing. Results : The higher the perceived stress, the lower the psychosocial wellbeing in both healthcare workers and the public. The higher the perceived stress, the lower the resilience and the research results showed that there was a partially mediating effect of resilience in the relationship between stress and psychosocial wellbeing. Conclusions : This study demonstrated that the degree of individual resilience can indirectly give a positive effect on the psychosocial wellbeing when people under the stress by MERS shows adverse effects on psychosocial wellbeing. This suggests that clinical intervention and psychosocial approach aiming at strengthening resilience is important to maintain mental health during crisis development.
The aim of the present study was to determine mechanisms of corneal epithelial cell apoptosis in vitro following exposure to anti-FAS and anti-FAS ligand antibody and during infection with mycoplasma sp.. A cultured human corneal epithelial(HCE) cell line was treated with anti-FAS antibody or anti-FAS ligand antibody for 2 and 4 days. The original cell line was found to be contaminated by mycoplasma removal agent(MRA) was used to eliminate the bacterium from the cell line. MRA($0.5{\mu}{\ell}$ tissue culture medium) was added to the cell line and incubated for 1 week. The cell line underwent multiple passages in media not contaminating MRA and cells were grown to 50-80% confluency on coverslips and stained using the Hoechst stain provided in the kit to ensure mycoplasma removal. Apoptosis experiments were performed before and after mycoplasma removal. The apoptotic index of anti-FAS and anti-FAS ligand antibody on mycoplasma contaminated cell line was studied using Hoechst 33342 staining and Annexin V-FITC and Propidium Iodide Staining. In conclusion, anti-FAS antibody induces apoptosis in HCE cells in a time and concentration-dependent mechanism. Cell lines contaminated with mycoplasma have an incresed susceptibility to FAS induced apoptosis.
When the orientations of joints are measured on a rock exposure, there are frequent cases that are difficult to approach by the surveyor to the target joints or to set up scanlines on the slope. In this study, to complement such limit and weak points, a new algorithm was developed to interpret joint orientation from analyzing the images of rock slope. As a method of arranging the multiple images of a rock slope, the multistage convergent photographing system was introduced to overcome the limitation of photographing direction which existing method such as parallel stereophotogrammetric system has and to cover the range of image measurement, which is the overlapping area between the image pair, to a maximum extent. To determine camera parameters in the perspective projection equation that are the main elements of the analysis method, a new method was developed introducing three ground control points and single ground guide point. This method could be considered to be very simple compared with other existing methods using a number of ground control points and complicated analysis process. So the global coordinates of a specific point on a rock slope could be analyzed with this new method. The orientation of a joint could be calculated using the normal vector of the joint surface which can be derived from the global coordinates of several points on the joint surface analyzed from the images.
Kim, Nam-Soo;Lee, Sung-Soo;Kim, Hee-Seon;Todd, Andrew C.;Lee, Byung-Kook
Journal of Korean Society of Occupational and Environmental Hygiene
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v.20
no.1
/
pp.19-28
/
2010
This study was designed to investigate the effect of increased blood and tibia lead on the change of bone mineral density in retired male lead workers. One hundred nine retired male lead workers who worked in 4 different lead industries and 51 nonoccupationally lead exposed male subjects were recruited from March 2004 to October 2004. Bone mineral density(BMD) was measured by broadband ultrasound attenuation(BUA) at left calcaneous bone area with broadband ultrasound attenuation method of QUS-2(Metra Biosystems Inc, USA). Tibia bone lead was measured for skeletal bone lead with K-xray fluorescence(K-XRF) and blood lead was analyzed with flameless atomic spectrophotometer. Hemoglobin, hematocrit, serum calcium and iron were also analyzed. In addition, information for smoking and drinking status and basic personal data such as age and lead exposure were also collected using questionnaire inquiry. Blood lead was correlated with tibia lead (r=0.711) and these two variables were negatively correlated with BUA in bivariate analysis. BUA and tibia lead showed significant main effects on the change of blood lead after adjusting covariates. The effect modification by the level of BMD (low: lower than the median of BUA and high: higher than the median of BUA) was observed between the association of tibia lead and blood lead after adjustment of covariates. The subjects who had higher BMD seemed to have lower blood lead by the increase of tibia lead than those of lower BMD. In the multiple regression analysis of blood lead and tibia lead on BUA after adjustment of covariates, only blood lead showed statistically significant effect on BUA. This study confirmed that BMD and blood lead were significantly associated. To verify the causal association of BMD on blood lead and vice versa, further longitudinal studies are needed.
Proceedings of the Korean Institute of Navigation and Port Research Conference
/
v.29
no.1
/
pp.109-117
/
2005
Based on the previous studies on alcohol effects on human behavior and performance in transportation system such as airplane and car driving, the alcohol exposure before and on watch of a ship has a great influence on subsequent behavior. In this paper, to examine the drinking status of officers on board multiple choice questionnaires are circularized under instruction and surveyed for 118 officers. According to the results of the questionnaire survey on alcohol dependance (Alcoholism) that was invested by WHO, over 27% of those surveyed represented alcohol abuse symptoms. In addition to that, the existing state and awareness for on-board-drinking was summarized to make a scenario of drunk-operation with a ship handling simulator to investigate the effect of alcohol (0.08 g% blood alcohol concentrations) on ship operational performance. A main effect for alcohol was found indicating that ship operational performance was comparatively impaired by this alcohol relative to performance in the non-alcohol condition. The results of this research can be applied to minimize marine acciedents as basic data.
Occupational exposure to inorganic dusts such as coal and silica has been identified as a chronic obstructive pulmonary disease (COPD) risk factor. This risk factor causes lung inflammation and protease-antiprotease imbalance. This abnormal inflammatory response of the lung induces parenchymal tissue destruction and leads to progressive airflow limitation that is characteristics of COPD. The aim of this study was to determine the relationship of proteases such as neutrophil elastase (NE) and matrix metalloproteinase (MMP)-9 and antiproteases such as alpha-1 antitrypsin (AAT) and tissue inhibitors of metalloproteinase (TIMP)-1 with lung function. The study population contained 223 retired workers exposed to inorganic dusts. We performed lung function test, including percent of forced expiratory volume in one second ($%FEV_1$) predicted and $%FEV_1$/forced vital capacity (FVC). We analyzed serum MMP-9, AAT, TIMP-1 and plasma NE concentrations by sandwich enzyme immunoassay. NE, AAT, and TIMP-1 concentrations in workers, who had $%FEV_1$<80% predicted, were higher than those of workers who had $%FEV_1{\geq}80%$ (P<0.05). Both AAT and TIMP-1 concentrations in workers with airflow limitation were higher than those of workers with normal airflow (P<0.05). $%FEV_1$ predicted showed significant negative correlation with AAT (r=-0.255, P<0.0l), TIMP-1 (r=-0.232, P<0.01), and NE (r=-0.196, P<0.01). $%FEV_1$/FVC predicted showed significant negative correlation with NE (r=-0.172, P<0.05). From the results of stepwise multiple regression analysis about $%FEV_1$ and $%FEV_1$/FVC, significant independents were NE (r=-0.135, P=0.001) and AAT (r=-0.100, P=0.013) in $%FEV_1$, and NE (r=-0.160, P=0.014) in $%FEV_1$/FVC. In the present study, there were significant correlations between airflow limitation and protease concentration and between airflow limitation and antiprotease concentration. Serum protease and antiprotease concentrations, however, may be affected by the biological and inflammatory responses. It is necessary to evaluate specimens more reflected the effects of proteases and antiproteases in the lung such as lung tissue, bronchoalveolar lavage fluid, and exhaled breath condensate (EBC).
Lee, Ahram;Kim, Joo Hyun;Baek, Ji Hyun;Kim, Ji Sun;Choi, Mi Ji;Yoon, Se Chang;Ha, Kyooseob;Hong, Kyung Sue
Korean Journal of Biological Psychiatry
/
v.22
no.4
/
pp.155-162
/
2015
Objectives Second-generation antipsychotics (SGAs) are frequently used in the treatment of bipolar disorder. However, there is still no consensus on their risk of tardive movement syndromes especially for first-generation antipsychotics (FGAs)-naïve patients. This study aimed to investigate the prevalence and associated factors of SGAs-related tardive dyskinesia and tardive dystonia in patients with bipolar disorder, in a naturalistic out-patient clinical setting. Methods The authors assessed 78 non-elderly patients with bipolar (n = 71) or schizoaffective disorder (n = 7) who received SGAs with a combined use of mood stabilizers for more than three months without previous exposure to FGAs. Multiple direct assessments were performed and hospital records longer than one recent year describing any observed tardive movement symptoms were also reviewed. Results The prevalence rates of tardive dyskinesia and tardive dystonia were 7.7% and 6.4%, respectively. These patients were being treated with ziprasidone, risperidone, olanzapine, quetiapine, or paliperidone at the time of the onset of the movement symptoms. Tardive dyskinesia was mostly observed in the orolingual area, and tardive dystonia was most frequently detected in oromandibular area. A past history of acute dystonia was significantly associated with presence of both tardive movement syndromes. Conclusions Our findings suggest that SGAs-related tardive movement syndromes occur in a substantial portion of bipolar disorder patients. Acute dystonia, a reported risk factor of tardive movement syndromes in the era of FGAs is confirmed as a risk factor of both tardive dyskinesia and tardive dystonia that were induced-by SGAs.
Scrophularia buergeriana Misrule has been contaminated with various pathogens in condition of field and storage period. This study was carried out for production of multiple stress resistance plant containing disease resistance that CGST gene expressed in transgenic Scrophularia buergeriana Misrule genome. Glutathione S-Transferases (GSTs) detoxify endobiotic and xenobiotic compounds by covalent linking of tripeptide glutathione to hydrophobic substrate. GST enzymes have been identified and characterized in insects, bacteria, and many plant species. A cDNA clone of GST was introduced into Scrophularia buergeriana Miquel by transformation with Agrobacterium tumefaciences. In coporation of the CGST gene into S. buergeriana Misrule was confirmed by PCR analysis of genomic DNA. Influence of exposure to darkness on the regeneration potential and transformation frequence were assessed. The activity of GST in transgenic plants was two times higher than that of non-transgenic plants. As a result of anti-microbe assays, the crude extract protein of transgenic plants showed the antimicrobial effects higher than control plants.
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