Kim, Eun-Ji;Jo, Seung-Wha;Yim, Eun-jung;Kim, Kum-Suk;Choi, Beom-Seok;Lee, Nam-Rye;Jung, Do-Youn
Journal of Life Science
/
v.30
no.5
/
pp.452-459
/
2020
This study was conducted to investigate the total lignin content and anti-oxidant activity in extracts of defatted sesame seeds (DSS) fermented with 15 strains of Bacillus subtilis. The anti-oxidant activities of DSS were analyzed both before and after fermentation. The total lignan content of the DSS extracts fermented with BCH3678 (1,613.8 mg/l) and BCH3572 (1,599.5 mg/l) were relatively high compared to other strains. Anti-oxidant activity was determined according to phenolic compound and flavonoid content and DPPH radical scavenging rate; the highest total phenolic compound content was provided by the DSS with SRCM103716 at 2,803.3 mg GAE/g which returned total flavonoid content of 1,553.1 mg/g as strong correlation of its anti-oxidant activity. The DSS extract fermented by SRCM103716 at 37℃ for 24 hr showed the highest DPPH scavenging rate at 66.5%. The fermented DSS extracts, regardless of strain, demonstrated higher anti-oxidative activity than the unfermented control, and these results suggest that such extracts could be useful as a potential source of bioactive compounds.
Kim, Pan Gil;Ha, Yeon Jo;Lee, Su Man;Kim, Sam Woong;Gal, Sang Wan
Journal of Life Science
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v.25
no.11
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pp.1197-1203
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2015
Salmonella Typhimurium (ST) JOL389 and χ3339 are strong virulent strains against mouse. ST χ8554 is derived by deletion of the asd gene from ST χ3339. Plasmid pMMP184 carrying a ghost cassette was transformed into ST χ8554, and ST χ8554 ghost cells were prepared and administrated via the oral route to BALB/c mice. Change in the amount of total IgG was not elicited to boosting of single ST χ8554 ghost cells, but the content was increased from 6 weeks after the 3rd administration. However, when the ST JOL389 ghost cells is administered together with ST χ8554 ghost cells, the content of total IgG was increased in 2 weeks post primary administration. It was found that the content of total IgG of the group mixed with ST JOL389 ghost cells showed an increased value of 8 times or more at 10 weeks when compared with the group of ST χ8554 ghost cells. The content of IgG1, IgG2a, and sIgA in both groups increased from 4 weeks postprimary administration. As a challenge test of virulent ST χ3339, χ8554 (pMMP184) and χ8554 (pMMP184)/JOL389 ghost cell groups showed protection of 50% or more when compared to the control group. These results suggest that the preparation of combined ghost cells from a strong virulent ST increases immunity more than a single strain.
The aim of this study is to investigate anti-stress effect of Scutellaria baicalensis(SB). The experiments were performed with the use of young (9 weeks of age) male rats of SD strain and the male ICR mice (20-25 g) at the time of first treatment with SB. Animals of the normal group were not exposed to any stress and the control group were exposed to stress. The rats of the Ginseng, Diazepam(BZ) and SB supplementary group were orally administered once a day 100 mg of red ginseng extract, 5 mg of BZ or 100 mg of SB extract/kg body weight and they were exposed to stress. The mice of the Ginseng, BZ and SB supplementary group were given water containing 200 mg of red ginseng extract, 10 mg of BZ or SB extract/100 ml potable water and exposed to stress. Animals were given supplements for 7 days without stress, and then were given supplement for 5 days with restraining and electroshock stress. We recorded stress related behavioral changes of the experimental animals by stressing them using the Etho-vision system and measured levels of blood corticosterone and IL-2. SB supplementation partially blocked the stress effect on locomotion in the rats and mice, and also partially blocked stress-induced behavioral changes such as freezing, burrowing, grooming, smelling, and rearing behavior in the rats and smelling, grooming, tailing, and rearing in the mice. in elevated plus maze test, the staying time of the stressed rats and mice in the open area decreased while it increased in the closed area. But these changes also partially were blocked by SB-supplementation. SB-supplementation decreased levels of the blood corticosterone which was increased by stress in the rats but did not significantly increase levels of blood interleukin 2 which was decreased by stress in mice.
This study was performed to investigate the effect of lactose in 4 different concentrations against the protective effect of calcium on the acute lead poisoning in rats after 4 weeks treatment. In this animal experiment, 70 albino male weanling rats (50-70g of body weight) of Sprague-Dawley strain were used. Lead was dissolved in the distilled water and intubated at the dose of 400mg lead (as acetate)/ kg of body weight/day. Calcium and lactose were administered in drinking water ad libiturn dissolved with the solution of 0.7% calcium gluconate mixed with 40, 80, 160 and 320mM lacotse respectively. The results obtained were summarized as follows: 1. The rate of body weight gain in all treated groups turned out to be lower than that in the control group during 4 weeks treatment. The slow-down of body weight gain was the most significantly observed in the group treated with lead only ( p < 0.05). 2. The relative spleen weight in lead only treated group was significantly lower than that of lead + calcium, lead + calcium + 80mM lactose treated group ( p < 0.05). 3. The value of RBC, WBC, Hb and Hct showed a decreasing tendency in the group treated with lead only ( p < 0.05), however, a significant decrease was not observed in the group treated with lead + calcium. On the other hand, the protective effect of calcium was deteriorated in the group treated with lead + calcium + lactose. 4. The activity of $\delta$-aminolevulinic acid dehydratase ($\delta$-ALAD activity) showed the same tendency as No. 2. 5. The lead concentration in the blood (PbB) showed an increasing tendency and the interrelation among the different groups was also identical with No. 2. 6. With a statistical approach, it was found out that the activity of $\delta$-ALAD and the lead concentration in the blood show a relation of inverse proportion(r=-0.7301). The diagram was interpreted with the logarithmic equation InY = 5.5357-0.0251X (X:PbB, Y:$\delta$-ALAD activity). 7. In the histopathological findings of the kidney, the protective effect of calcium was observed. However, the protective effect of calcium was restricted in the group treated with lead + calcium + lactose. As a conclusion, the intensity of the acute ingested lead poisoning was obviously reduced by calcium, however, the protective effect of calcium was deteriorated in proportion with the concentration of the lactose to be administered. On the other hand, it was also noted that the deterioration was lightly restrained in the group treated with the physiological concentration of 80mM lactose than the results shown in the groups treated with lactose of other concentrations.
As a material of metal-ceramic prosthesis, nickel as a form of Ni-Cr alloy has been used for many dental prostheses in many cases. However, several problems in use of the alloy have been revealed (ex : tissue stimulation, skin allergy, hypersensitivity, cytotoxicity and carcinogenecity). Little is known about nickel with respect to the relationship between Ni-prosthesis and gaining of Ni-resistance in oral microorganisms. The present study was undertaken to check wheather use of Ni-prosthesis leads to occurrence of Ni-resistant microorganisms. So this study may suggest the possible relationships between the oral microorganisms and nickel-resistance in oral environment. Bacteria were isolated from the gingival crevicular fluid on the pateints wearing Ni-Cr prosthesis. The isolated bacteria were tested for their Ni-resistance in nickel containing media at different concentration from 3mM to 110mM. E. coli HB101 was used as control. The Ni-resistant bacteria were isolated and biochemically identified. The Ni-resistant bacteria were tested several bio-chemical, molecular-biological tests. Performed tests were ; measuring the growth curve, antibiotic test, growth ability test in liquid media, isolation of the chromosome and plasmid, digestion of DNA by restriction enzyme, electrophoresis of chromosome and plasmid DNA, identification of Ni-resistant genes by the DNA hybridization. The results were as follows: 1) The bacteria isolated from gingival crevicular fluid on the patients wearing Ni-Cr alloy pros-thesis showed nickel-resistance. 2) The isolated microorganisms grew at nickel containing media of high concentrations (60mM-110mM). 3) Based on the biochemical tests, the isolated microorganisms were identified as Enterococcus faecalis(13 cases), Klebsiella pneumoniae(1 case) and Enterobacter gergeviae(1 case). 4) Enterococcus faecalis expressed not only nickel resistance but also the multi-drug resistance to several antibiotics ; chloramphenicol, kanamicin, streptomycin, lincomycin, clindamycin. However, all strain showed the sensitivity against the tetracycline. 5) DNA hybridization result suggest that there is no homology between the previousely known gene of nickel resistance in Klebsiella pneumoniae and chromosomal DNA of Enterococcus faecalis.
The present study was carried out to evaluate the morphological changes in the degenerating primordial follicles induced by $\gamma$-radiation. The prepubertal female mice of three weeks old ICR strain were whole-body irradiated with a dose of $LD_{80(30)}$ (8.3 Gy). The ovaries were collected at 0 h, 3 h, 6 h, and 12 h post-irradiation. The largest cross sections were prepared with histological semi-thin sections and then observed microscopically. The ratio of normal to atretic follicles was reduced significantly after 6th post-irradiation. At 6 h post-irradiation, the number of degenerated primordial follicles increased. Germinal vesicles disappeared, and lipid droplets increased. No more ooplasmic membranes were seen. Granulosa cells became round in shape, and apoptotic cells started to appear. The ratio of normal to atretic follicles in the control group was 62.50%. The ratio decreased with time after irradiation. The ratio decreased down to 51.61 %, 48.97 %, 11.11 %, and 7.14 % at 0 h, 3 h, 6 h, and 12 h, respectively. Taken together, ionizing radiation acutely induced the degeneration of primordial follicles. The patterns of degeneration are 1) apoptosis of one or more granulosa cells with relatively intact oocyte, 2) apoptosis of oocyte with intact follicle cells, or 3) apoptotic degenerations of both cells. The Present study can provide morphological clues for the identification of degenerating primordial follicles.
Rammed Aggregate Pier (RAP) method is intermediate foundation between deep and shallow foundation, and it has been built in world wide. RAP represents a relatively new method that has grown steadily over 19 years since Geopier of USA developed this revolutionary method in 1989. The investigation and research in domestic is not accomplished. In this paper, the examined details of different spacing of piles, bearing capacities, respectively, conclude with recommendations on how RAP can be used in future needs. This documentation further provides comparisons of the laboratory test results which were obtained from changing the spacing of piles, namely installed rammed aggregate pier. Laboratory model test was administered in a sand box. Strain control test was conducted to determine the bearing capacities of the piers; 20 mm, 30 mm and 40 mm RAP in diameter using drilling equipment to make holes were installed in sand at initial relative densities of 40%. By comparing different spacing of piles, in this experiment, piles are spaced structually span, form a ring shape, narrowing the distance of each other, to the center. the result shows that as diameter of pier is bigger in diameter, bearing capacity also dramatically increased due to raised stiffness. Also, as the space between each piers was closed, the settlement rate of soil was decreased significantly. From the test results, as the space between each piles were getting closer, it allows greater chances to have more resistance to deformation, and shows more improved stability of structures. After from the verification work which is continuous leads the accumulation of the site measuring data which is various, and bearing capacity and the settlement is a plan where the research will be advanced for optimum installed RAP.
Four hundred and fifty tilapias ($6.77{\pm}0.23$ g) were assigned randomly to six groups to evaluate the feasibility of the tested antibacterial peptides (ABPs) and oligosaccharides as substitutes for antibiotics. The control group was fed with a commercial tilapia diet; other five groups were fed with the same commercial diet supplemented with konjac glucomannan (KGLM), cluster bean galactomannan (CBGAM), and three animal intestinal ABPs derived from chicken, pig and rabbit at 100 mg/kg respectively. After 21 days of feeding, growth, disease resistance, and in vivo anti-adherence were determined. Furthermore, the inhibitory effect of tested agents on adhesion of Aeromonas veronii biovar sobria (A.vbs) strain BJCP-5 to tilapia enteric epithelia in vitro was assessed by cell-ELISA system. As a result, the tested agents supplemented at 100 mg/kg show significant benefit to tilapia growth and disease resistance (p<0.05), and the benefit may be correlated with their interfering in the contact of bacteria with host mucosal surface. Although none of the tested agents did inhibit the growth of BJCP-5 in tryptic soy broth at $100{\mu}g/ml$, all of them did inhibit the adhesion of A.vbs to tilapia enteric epithelia in vivo and in vitro. In vitro mimic assays show that three ABPs at low concentrations of $25{\mu}g/ml$ and $2.5{\mu}g/ml$ have the reciprocal dose-dependent anti-adherence effect. The inhibition of ABPs may be correlated with a cation bridging and/or receptor-ligand binding, but not with hydrophobicity. The KGLM and CBGAM inhibited the adherence of BJCP-5 to tilapia enteric epithelia with dose-dependent manner in vitro, and this may be through altering bacterial hydrophobicity and interfering with receptor-ligand binding. Our results indicate that the anti-adherence of the tested ABPs and oligosaccharides may be one of the mechanisms in promoting tilapia growth and resistance to A.vbs.
Background: Cancer is a major threat to the public health whether in developed or in developing countries. As the most common primary malignant tumor, the morbidity and mortality rate of lung cancer continues to rise in recent ten years worldwide. Chemotherapy is one of the main methods in the treatment of lung cancer, but this is hampered by chemotherapy drug resistance, especially MDR. As a component of the 60S large ribosomal subunit, ribosomal protein L39-L gene was reported to be expressed specifically in the human testis and human cancer samples of various tissue origins. Materials and Methods: Total RNA of cultured drug-resistant and susceptible A549 cells was isolated, and real time quantitative RT-PCR were used to indicate the transcribe difference between amycin resistant and susceptible strain of A549 cells. Viability assay were used to show the amycin resistance difference in RPL39-L transfected A549 cell line than control vector and null-transfected A549 cell line. Results: The ribosomal protein L39-L transcription level was 8.2 times higher in drug-resistant human lung cancer A549 cell line than in susceptible A549 cell line by quantitative RT-PCR analysis. The ribosomal protein L39-L transfected cells showed enhanced drug resistance compared to plasmid vector-transfected or null-transfected cells as determined by methyl tritiated thymidine (3H-TdR) incorporation. Conclusions and Implications for Practice: The ribosomal protein L39-L gene may have effects on the drug resistance mechanism of lung cancer A549 cells.
Myrionecta rubra, a mixotrophic ciliate, is a cosmopolitan red tide species which is commonly found in neritic and estuarine waters. M. rubra had long been listed as an “nculturable protist”until 2 different laboratory strains were finally established in 2 research groups at the beginning of this century, enabling us to perform initiative investigation into various aspect of the live M. rubra strains (Gustafson et al. 2000; Yih et al. 2004b; Johnson and Stoecker 2005). Field sampling was carried out on high tide at 2 fixed stations around Kunsan Inner Harbor (St.1 near the Estuarine Weir and St.2 off Kunsan Ferry Station) every other day for 4 months from mid-February 2004 to understand detailed figure of the recurrent spring blooms of M. rubra following the onset of the water gates operation of the Keum River Estuarine Weir on August 1994. With its maximum abundance of 272 cells mL$^{-1}$ in St.1, fluctuation pattern of the M. rubra population at the 2 stations was strikingly similar. Notable growth of M. rubra population started on late April, to cause M. rubra red tides during one month from mid-May in which “xceptionally low salinity days”without its red tide were intermittently inserted. High abundance of M. rubra over 50 cells mL$^{-1}$ was recorded at samples with their water temperature and salinity higher than 15${^{\circ}C}$ and 4.0 psu, respectively. During pre-bloom period when salinity fluctuation is moderate and the water temperature is cooler than 15°C, Skeletonema costatum, a chain-forming centric diatom, was most dominant. Cyanobacterial species such as Aphanizomenon flos-aquae and Phormidium sp. replaced other dominant phytoplankters on the days with “xceptionally low salinity”even during the main blooming period of M. rubra. To summarize, M. rubra could form spring blooms in Keum River Estuary when the level of salinity fluctuation was more severe than that for the dominant diatom Skeletonema costatum and milder than that for the predominance by freshwater cyanobacteria. Therefore, optimal control of the scale and frequency of freshwater discharges might lead us to partially modify the fluctuation pattern of M. rubra populations as well as the period of spring blooms by M. rubra in Keum River Estuary. Sampling time interval of 2 days for the present study or daily sampling was concluded to be minimally required for the detailed exploration into the spring blooms by M. rubra populations in estuaries with weirs like Keum River Estuary.
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