• Journal of Korean Public Health Nursing
• /
• v.22 no.1
• /
• pp.121-130
• /
• 2008

Purpose: Immunization is one of the simplest and most effective approaches for protecting the health of children from preventable infectious disease. This study assessed the immunization statuses of children presenting to childcare centers in Korea and compared the sociodemographic factors of children with age-appropriate immunization for DTaP4 with those with delayed immunization for DTaP4. Method: A national mail survey was used to collect data on the children's immunization history and sociodemographic information. A total of 248 mothers returned completed questionnaires for their children. Results: The overall immunization coverage for HepB, a series of DTaP and polio and varicella was above 95%. However, the percentage of age-appropriate immunizations of vaccines ranged from 45.3% to 69.0% depending on the vaccines. Only the age of the child was a significant factor for delayed immunization for DTaP4. Conclusion: To fully protect children from vaccine-preventable disease, childcare providers can playa role in monitoring the immunization statuses of children in their care centers to ensure that they all receive all childhood immunizations on time.

• Food Science and Preservation
• /
• v.12 no.2
• /
• pp.179-183
• /
• 2005

This study was performed to determine the antioxidative, antimutagenic, and anticancer effects of vaporized liquid of water-boiled pine needle(VLP) using DPPH free radical donating method, Ames test, and cytotoxicity. VLP showed the highest electron donating activities $(18.4\;{\mu}L)$. The inhibition rate of VLP $(200\;{\mu}L/plate)$ in the Salmonella. typhimurium TA100 strain showed $45.9\%$ inhibition against the mutagenesis induced by MNNG. In addition, the suppression of with same concentration of VLP in the S. typhimurium TA100 strains showed $85.5\%$ inhibition against 4NQO, respectively. The suppressions under the same condition against Trp-P-1 in the TA98 and TA100 strains were $91.0\%$ and $62.1\%$, respectively. The cytotoxic effects of VLP against the cell lines with human lung carcinoma (A549), human hepatocellular carcinoma (HepG2) , human gastric carcinoma (AGS), human breast adenocarcinoma (MCF-7) and human cervical adenocarcinoma (HeLa) were inhibited with increase of the VLP concentration. The treatment of $50\;{\mu}L/well$ VLP showed strong cytotoxicities of $78.7\%,\;90.3\%,\;90.8\%,\;62.3\%$ and $93.7\%$ against A549, HepG2, AGS, MCF-7 and HeLa, respectively.

• Korean Journal of Environmental Biology
• /
• v.34 no.2
• /
• pp.107-115
• /
• 2016

Currently, there are 442 operating nuclear power plants in the world, and 62 more are under construction. According to this reasoning, the treatment of radioactive waste is important to prevent the environmental ecosystem including humans, animals, and plants. Especially, a leakage of radioactive waste causes not only regional problem but also serious global one. In this study, we demonstrate the effect of radioisotopes (e.g., cesium, strontium, and cobalt) on a 3D culture cell. To develop the 3D cell culture system, we used a 96-well-culture plate with biocompatible agarose hydrogel. Using this method, we can perform the 3D cell culture system with three different cell lines such as HeLa, HepG2, and COS-7. In addition, we conducted a cell viability test in the presence of radioisotopes. Interestingly, the 3D morphological cells showed 42% higher cell viability than those on the 2D against cesium. This result indicates that the 3D platform provides cells morphological and physiological characteristic similar to in vivo grown tissues. Moreover, it overcomes the limitation of conventional cell culture system that can't reflect in vivo systems. Finally, we believe that the proposed approach can be applied a new strategy for simple high-throughput screening and accurate evaluation of metal toxicity assay.

• The Korean Journal of Food And Nutrition
• /
• v.25 no.2
• /
• pp.259-265
• /
• 2012

In this study, we determined total polyphenol content(TPC) and total flavonoid content(TFC) of extracts from Korean cabbage and cabbage using a spectrophotometric method as well as glucosinolates concentration by HPLC. TPCs of Korean cabbage and cabbage extracts were 308.48 ${\mu}g$ GAE/g dry weight and 344.75 ${\mu}g$ GAE/g dry weight, respectively. TFCs of Korean cabbage and cabbage extracts were 5.33 ${\mu}g$ QE/g dry weight and 5.95 ${\mu}g$ QE/g dry weight, respectively. We found six different glucosinolates, namely progoitrin, glucoalyssin, gluconapin, glucobrassicanapin, glucobrassicin and 4-methoxyglucobrassicin in the Korean cabbage extract. In the cabbage extract, there was four glucosinolates, namely glucoraphanin, sinigrin, glucobrassicin and 4-methoxyglucobrassicin. We determined the cytotoxic effect of Korean cabbage and cabbage extracts in AGS human stomach cancer cells, HepG2 human hepatic cancer cells and LNCaP human prostate cancer cells by MTT assay. Dose-dependent relationships were found between the extract concentrations and cancer cell growth inhibition. The overall results support that both Korean cabbage and cabbage, the major vegetables in Korea, contain bioactive compounds such as polypheol, flavonoids as well as glucosinolates and they may play a positive role in cancer prevention.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.37 no.1
• /
• pp.1-7
• /
• 2008

The antioxidative, antimutagenic and cytotoxic activities of ethanol extract from Cornus officianalis have been studied. The antioxidant activity of the ethanol extract was measured by 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. The inhibition effects on the mutagenicity in Salmonella Typhimurium TA100 were evaluated by Ames test and cancer cell inhibitory effects in Hep3B cell and HeLa cell were tested by MTT assay. Cornus officianalis had an important free radical-scavenging activity towards the DPPH radical. At a concentration of 500 ppm, the DPPH radical-scavenging activity of Cornus officianalis was similar to that of L-ascorbic acid. None of the extracts produced a mutagenic effect on S. Typhimurium TA100. The ethanol extract from Cornus officianalis showed about 77% of inhibition at 500 ppm on the mutagenicity induced by 4-nitroquinoline-1-oxide. The extract from Cornus officianalis showed strong cytotoxicity against Hep3B and HeLa cells, with inhibition of 83 and 78% at a dose of $700{\mu}g$/plate, respectively. Moreover, the ethanol extracts had 34.33 mg H.E/g of polyphenols and 5.67 mg Q.E/g of flavonoids, respectively. Therefore, the present study showed antioxidative, antimutagenic and anticancer potential of the ethanol extract from Cornus officianalis.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.43 no.12
• /
• pp.1801-1807
• /
• 2014

Blue mussels (Mytilus edulis) are widely distributed among the world's oceans in various habitats. The purpose of this study was to investigate the effects of freeze-drying on the antioxidant and antigenotoxic activities of blue mussels collected in the Gyeongnam coast area of Korea. Raw (RM) and freeze-dried blue mussel flesh (FRM) were extracted with ethanol, methanol, and water. Antioxidant activities were evaluated on the basis of DPPH radical scavenging activity, oxygen radical absorbance capacity (ORAC), cellular antioxidant capacity (CAC), and antigenotoxic activity (comet assay). Except for the water extract, RM and FRM showed DPPH radical scavenging activities, which increased upon freeze-drying in MeOH extract. The highest ORAC value was observed in water extract of RM and MeOH extract of FRM. CAC was protected against AAPH-induced oxidative stress in HepG2 cells by both RM and FRM extracts. Freeze-drying lowered ORAC value of water extract, whereas it increased CAC activity, suggesting that antioxidant activities varied according to the generated radicals. All extracts from RM and FRM showed antigenotoxic activities by reducing $H_2O_2$-induced DNA damage in human leukocytes. Freeze-drying had no effect on antigenotoxicity of blue mussels. Taken together, these results indicate that blue mussels possess antioxidant and antigenotoxic properties, and freeze-drying might be a useful processing method for blue mussels to retain their maximum physiological potential as a functional food.

• Biomolecules & Therapeutics
• /
• v.27 no.2
• /
• pp.193-200
• /
• 2019

Ceramide metabolism is known to be an essential etiology for various diseases, such as atopic dermatitis and Gaucher disease. Glucosylceramide synthase (GCS) is a key enzyme for the synthesis of glucosylceramide (GlcCer), which is a main ceramide metabolism pathway in mammalian cells. In this article, we developed a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method to determine GCS activity using synthetic non-natural sphingolipid C8-ceramide as a substrate. The reaction products, C8-GlcCer for GCS, could be separated on a C18 column by reverse-phase high-performance liquid chromatography (HPLC). Quantification was conducted using the multiple reaction monitoring (MRM) mode to monitor the precursor-to-product ion transitions of m/z $588.6{\rightarrow}264.4$ for C8-GlcCer at positive ionization mode. The calibration curve was established over the range of 0.625-160 ng/mL, and the correlation coefficient was larger than 0.999. This method was successfully applied to detect GCS in the human hepatocellular carcinoma cell line (HepG2 cells) and mouse peripheral blood mononuclear cells. We also evaluated the inhibition degree of a known GCS inhibitor 1-phenyl-2-decanoylamino-3-morpholino-1-propanol (PDMP) on GCS enzymatic activity and proved that this method could be successfully applied to GCS inhibitor screening of preventive and therapeutic drugs for ceramide metabolism diseases, such as atopic dermatitis and Gaucher disease.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.36 no.5
• /
• pp.515-520
• /
• 2007

This study was peformed to determine the antioxidative, antimutagenic and cytotoxic effects of the natural seasoning using Lentinus edodes powder (NSLP) by DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical donating method, Ames test, and cytotoxicity, respectively. The scavenging effect on DPPH radical in ethyl acetate fraction of NSLP showed $155{\mu}g\;of\;RC_{50}$. The direct antimutagenic effects of ethanol extract and its solvent fractions of NSLP were examined by Ames test using Salmonella Typhimurium TA98 and TA100. In the Ames test, ethanol extract of NSLP alone did not exhibit any mutagenicity and most of the samples showed high antimutagenic effects against mutation induced by N-methyl-N'-nitro-N-nitroso guanidine (MNNG) and 4-nitroquinoline-1-oxide (4NQO). Ethyl acetate fraction of NSLP ($200{\mu}g/plate$) showed approximately 82% inhibitory effect on the mutagenesis induced by 4NQO against TA98 strain, whereas 84% and 80% inhibitions were observed on the mutagenesis induced by 4NQO and MNNG against TA100 strain. In anticancer effects of ethanol extract and its solvent fractions of NSLP against cancer cell lines including human lung carcinoma (A549), human breast adenocarcinoma (MCF-7), human hepatocellular carcinoma (Hep3B), human cervical adenocarcinoma (HeLa) and human gastric carcinoma (AGS) were investigated. The treatment of 1 mg/mL ethyl acetate fraction of NSLP showed strong cytotoxicity of 56.7%, 84.9%, 64.6%, 85.1% and 71.5% against A549, MCF-7, Hep3B, HeLa and AGS, respectively. In contrast 1 mg/mL treatment of NSLP extract and its solvent fractions had only $4{\sim}40%$ cytotoxicity on human transfomed primary embryonal kidney cell (293). From this result, it is suggested that NSLP is believed to have possible antioxidative, antimutagenic and anticancer capacities.

• Applied Chemistry for Engineering
• /
• v.30 no.5
• /
• pp.569-579
• /
• 2019

In this study, the effect anti-oxidant, anti-inflammatory, and liver protective activity was investigated via quick ultrasonic disintegration of pine pollen using a probe sonicator (PS) followed by the extraction with water, 70% ethanol, and 100% ethanol. The anti-inflammatory effect was studied by measuring the production of nitric oxide (NO) and cytokine in RAW264.7 cells induced with lipopolysaccharides (LPS). The cell toxicity was also checked with an 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and the experiment was conducted using non-toxic $100{\mu}g/mL$. The NO inhibition rate was highest in the 70% ethanol PS group at $85.99{\pm}0.12%$. Also an excellent efficiency was obtained from the results of interlukin-1 beta ($IL-1{\beta}$) and tumor necrosis factor alpha ($TNF-{\alpha}$), which is related to inflammation-related cytokine, with the respective inhibition rates of 63 and 22%. To examine liver protective activity, HepG2 cells were treated with Taclin, and the generation of glutamic oxaloacetic transaminase (GOT) and lactate dehydrogenase (LDH) was measured in the culture solution. From GOT and LDH generation results, the inhibition rates in the 70% ethanol PS group were 28% and 13%, respectively, which was higher compared to that of using negative control group. Our results suggest that pine pollen extracted in 70% ethanol using PS may be used to develop food products that have anti-aging, anti-inflammatory, and liver protective effects.

• Food Science and Preservation
• /
• v.14 no.2
• /
• pp.220-225
• /
• 2007

This study was performed to measure the antioxidative, antimutagenic, and cytotoxic properties of Prunus armeniaca using the DPPH (1, 1-diphenyl-2-picrylhydrazyl) free radical donating method, the Ames test, and cytotoxicity measurements, respectively. Electron-donating abilities were 48.3, 43.9, 14.8 and 12.9 per g dry matter of P. armeniaca seed (PAS), P. armeniaca flesh(PAF), butylated hydroxytoluene, and ${\alpha}-tocopherol$, respectively. The direct antimutagenic effects of an ethanol extract of P. armeniaca were examined in Ames tests using Salmonella typhimurium TA98 and TA100 as reporter organisms. In the Ames test, the ethanol extract of P. armenicaca alone did not exhibit any mutagenicity but the extract did show substantial inhibitory effects against mutations induced by N-methyl-N'-nitro-N-nitrosoguanidine(MNNG) and 4-nitroquinoline-1-oxide(4NQO). The ethanol extract of PAS(200g dry matter/plate) inhibited strain TA98 mutagenesis induced by 4NQO by ca. 37.9%, and mutation inhibition values of 42.1% and 69.4%, respectively, were observed when 4NQO and MNNG acted on the TA100 strain. The cytotoxic effects of ethanol extracts of P. armeniaca against cell lines of human lung carcinoma(A549), human breast adenocarcinoma(MCF-7), human hepatocellular carcinoma(Hep3B), human cervical adenocarcinoma(HeLa), and human gastric carcinoma(AGS) rose with increases in extract concentration. An ethanol extract(4mg/mL dry matter) of PAF showed strong cytotoxicities of 88.2%, 58%, 72.8%, 89.4%, and 91.9% against A549, AGS, MCF-7, HeLa, and Hep3B cells, respectively. In contrast, the same extract showed only 13 37% cytotoxicity for a nomal human kiney cell line(293). It is suggested that P. armeniaca possesses useful antioxidative, antimutagenic, and anticancer properties.