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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Society for Biotechnology and Bioengineering
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Volume 31, Issue 2 - Jun 2016
Volume 31, Issue 1 - Mar 2016
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LC-PDA/MS/MS Analysis of Glucosinolates in Dolsan Leaf Mustard Kimchi and Dolsan Leaf Mustard Pickles
Oh, Sun Kyung ; Tsukamoto, Chigen ; Kim, Ki Woong ; Choi, Myeong Rak ;
KSBB Journal, volume 31, issue 1, 2016, Pages 1~7
DOI : 10.7841/ksbbj.2016.31.1.1
Changes in the concentrations of glucosinolates and related compounds in different extracts of Dolsan leaf mustard kimchi (DLMK) and Dolsan leaf mustard pickles (DLMP) were during storage investigated. Samples were kept at 0oC for 35 days and collected at 7 day intervals. The leaves and stems of DLMK and DLMP were refluxed for 24 h with 50% acetonitrile, and the extracts were analyzed by LC-PDA/MS/MS. The main glucosinolates detected in DLMK were sinigrin, gluconapoleiferin, glucobrassicanapin, and gluconapin, whereas those in DLMP were sinigrin, gluconapoleiferin, glucobrassicanapin, glucobrassicin, and glucoerucin. Sinigrin concentrations were quantified by UV absorption at 228 nm. Sinigrin concentrations in the leaves and stems of DLMK on the day of preparation were 2.14 mg/g and 2.25 mg/g, respectively, and those on day 35 after preparation were 1.25 mg/g and 1.00 mg/g, respectively. DLMP showed a similar trend: the concentrations in the leaves and stems on the day of preparation were 2.04 mg/g and 0.29 mg/g, respectively, whereas those on day 35 after preparation were 0.59 mg/g and 0.41 mg/g, respectively. Thus, sinigrin concentrations decreased during storage.
Effect of Fruit-Vegetable Juices Containing Angelica keiskei on Alcohol Metabolizing Enzyme Activities in vitro
Kim, Min-Ju ; Lim, Sang-Wook ; Ahn, Hye-Jin ; Jun, Junggyu ; Kang, Min-Jung ;
KSBB Journal, volume 31, issue 1, 2016, Pages 8~13
DOI : 10.7841/ksbbj.2016.31.1.8
Excessive alcohol consumption can cause hangover symptoms, such as headache, drowsiness, dizziness, gastrointestinal distress, and anxiety. The aim of this study was to investigate alcohol metabolizing enzyme activities and antioxidant activities of fruit-vegetable juices containing Angelica keiskei prepared using a low speed masticating juicer in vitro. The acceleration rate of alcohol dehydrogenase (ADH) by A. keiskei-cherry tomato juice (ACJ) and A. keiskei-green grape juice (AGJ) were
, respectively. The acceleration rate of aldehyde dehydrogenase (ALDH) by ACJ and AGJ were
, respectively. Total polyphenol of ACJ and AGJ were
, respectively. DPPH radical scavenging activities of ACJ and AGJ were
, respectively. Thus, these results indicate that alcohol degrading enzyme activities can be enhanced by fruitvegetable juices containing A. keiskei.
A Study on Peanut Spouts Extract as the Anti-oxidant Activity and the Skin Whitening Cosmetic Ingredients
Yoon, Mi Yun ;
KSBB Journal, volume 31, issue 1, 2016, Pages 14~19
DOI : 10.7841/ksbbj.2016.31.1.14
To investigate the effect of peanut sprout extract on skin care, we measured anti-oxidant activity and whitening action. As a result of measuring DPPH radical scavenging activity to examine independent anti-oxidation of peanut sprout extract, there was strongly scavenging activity. Fluorescent material DCF-DA was used to measure hydrogen peroxide created in RAW 264.7 cells, and all concentration dependently decreased ROS production. As a result of measuring nitric oxide to examine anti-inflammation of peanut sprout extract, there was strongly inhibited nitric oxide production in RAW 264.7 cells. Tyrosinase activation was found to inhibited dose-dependant. Melanin production was also prevented dose-dependant. Therefore, it is expected to be used effectively in development of functional cosmetic materials.
Quality Characteristics of Dolsan Leaf Mustard according to Various Blanching Conditions and Liquid Chromatography with Photodiode Array and Tandem Mass Spectrometry Analysis
Son, Hae-Reon ; Oh, Sun-Kyung ; Tsukamoto, Chigen ; Choi, Myeong-Rak ;
KSBB Journal, volume 31, issue 1, 2016, Pages 20~26
DOI : 10.7841/ksbbj.2016.31.1.20
This study aims to examine the optimum blanching conditions as a pretreatment condition to improve the storage stability of Dolsan leaf mustard pickle. The effects of the blan- ching temperature and time were investigated at a temperature range of
. Sampling was done for 1 month after a 5 days interval. The L value of the Dolsan leaf mustard was found to be the highest at
. The cutting force increased as the blanching temperature increased. The tensile strength decreased at
. In addition, the sensory evaluation scores were the best at
. The storage stability was assessed at various blanching temperatures to increase the sinigrin content during storage. Liquid chromatography with photodiode array and tandem mass spectrometry (LC-PDA/MS/MS) analysis was conducted to identify and quantify the sinigrin content in the Dolsan leaf mustard. Sinigrin as an internal standard was co-injected into each sample solution. The sample was monitored by recording the ultraviolet absorbance at 228 nm and by electrospray ionization (ESI) positive ion mode in the m/z 50-1,500 range. Blanching the sample at
showed the highest sinigrin concentration during storage among various temperatures and the maximum concentration was 350 ppm at 15 days storage. Study on utilization of vegetable from food processing of leaf mustard and preservation conservation results suggest that blanching at
is expected to improve the palatability of the pickle.
Biosynthesis of Lactate-containing Polyhydroxyalkanoates in Recombinant Escherichia coli by Employing New CoA Transferases
Kim, You Jin ; Chae, Cheol Gi ; Kang, Kyoung Hee ; Oh, Young Hoon ; Joo, Jeong Chan ; Song, Bong Keun ; Lee, Sang Yup ; Park, Si Jae ;
KSBB Journal, volume 31, issue 1, 2016, Pages 27~32
DOI : 10.7841/ksbbj.2016.31.1.27
Several CoA transferases from Clostridium beijerinckii, C. perfringens and Klebsiella pneumoniae were examined for biosynthesis of lactate-containing polyhydroxyalkanoates (PHAs) in recombinant Escherichia coli XL1-Blue strain. The CB3819 gene and the CB4543 gene from C. beijerinckii, the pct gene from C. perfringens and the pct gene from K. pneumoniae, which encodes putative CoA transferase gene, respectively, was co-expressed with the Pseudomonas sp. MBEL 6-19 phaC1437 gene encoding engineered Pseudomonas sp. MBEL 6-19 PHA synthase 1 (
) to examine its activity for the construction of key metabolic pathway to produce poly(3-hydroxybutyrate-co-lactate) [P(3HB-co-LA)]. The recombinant E. coli XL1-Blue expressing the phaC1437 gene and CB3819 gene synthesized poly(3-hydroxybutyrate) [P(3HB)] homopolymer to the P(3HB) content of 60.5 wt% when it was cultured in a chemically defined medium containing 20 g/L of glucose and 2 g/L of sodium 3-hydroxybutyrate. Expression of the phaC1437 gene and CB4543 gene in recombinant E. coli XL1-Blue also produced P(3HB) homopolymer to the P(3HB) content of 51.2 wt% in the same culture condition. Expression of the phaC1437 gene and the K. pneumoniae pct gene in recombinant E. coli XL1-Blue could not result in the production of PHAs in the same culture condition. However, the recombinant E. coli XL1-Blue expressing the phaC1437 gene and the C. perfringens gene could produce poly(3-hydroxybutyrate-co-lactate [P(86.4mol%3HB-co-13.7 mol%LA) up to the PHA content of 10.6 wt% in the same culture condition. Newly examined CoA transfereases in this study may be useful for the construction of engineered E. coli strains to produce PHA containing novel monomer such lactate.
Live Cell Detection of Monoclonal Antibody Light and Heavy Chain mRNAs using Molecular Beacons
Jeong, Seunga ; Rhee, Won Jong ;
KSBB Journal, volume 31, issue 1, 2016, Pages 33~39
DOI : 10.7841/ksbbj.2016.31.1.33
Developing the method for the selection of animal cell line producing therapeutic monoclonal antibody (mAb) is invaluable as its market is rapidly growing. Although the quality of produced mAb is as important as quantity, however there is no method developed for the selective screening of cell lines on the basis of both quantity and quality. From recent reports, the ratio of light and heavy chain mRNAs of mAb in the cell is a key parameter for the indication of product quality. Therefore, it is obvious that developing the novel method that can detect both light and heavy chain mRNAs in single live cell will provide unprecedented opportunities in bio-industry. Here, we have constructed oligonucleotide probes, molecular beacons for the detection of light or heavy chain mRNAs, respectively, in the live cells producing mAbs. Both beacons showed increased fluorescent intensity after transient transfection of plasmid expressing mAbs analyzed by fluorometer. Flow cytometric analysis clearly demonstrated that both molecular beacons can simultaneously detect the expression of light and heavy chain mRNAs of mAb in the same cell. The technique described in the thesis provides the new direction and concept for developing the method for the smart selection of cell lines producing recombinant proteins including therapeutic mAbs.
Characterization and Inhibitory Activity of Lactobacillus plantarum MG989 and Lactobacillus fermentum MG901 Isolated from Vaginal Microbiota of Korean Women against Gardnerella vaginalis and Candida albicans
Paek, Nam-Soo ; Lee, Youn Yeop ; Han, Seul Haw ; Kang, Chang-Ho ; So, Jae-Seong ;
KSBB Journal, volume 31, issue 1, 2016, Pages 40~45
DOI : 10.7841/ksbbj.2016.31.1.40
Vaginitis, also known as vaginal infection and vulvovaginitis, is an inflammation of the vagina and possibly vulva. The three main kinds of vaginitis are bacterial vaginosis, vaginal candidiasis, and trichomoniasis. The purpose of this study was to characterize Lactobacillus plantarum MG989 and L. fermentum MG901 isolated from the vaginas of healthy Korean women in terms of their inhibitory activity against the vaginitis associated pathogens such as Gardnerella vaginalis and Candida albicans. Co-culture experiments showed that the two Lactobacillus strains MG989 and MG901 significantly reduced the viability of G. vaginalis and C. albicans. Also, the two strains were resistant to bile acid up to 1% and their autoaggregation rates were as high as 83.33%. Further studies are underway to demonstrate that the two strains can be applied as pharmaceutical agents for recovering healthy vaginal ecosystem.
Facile and Effective Detection of Vitamin C on a Paper Based Kit
Hwang, Jangsun ; Seo, Youngmin ; Choi, Jonghoon ;
KSBB Journal, volume 31, issue 1, 2016, Pages 46~51
DOI : 10.7841/ksbbj.2016.31.1.46
Recently paper based diagnostic kits have drawn great interest in the point-of-care testing market (POCT). The paper based detection systems provide inexpensive, rapid and safe analyses for disease markers and/or pathogens. Vitamin C (i.e., ascorbic acid) regulates body`s immune system as an antioxidant agent. Humans, however, do not have enough amounts of enzymes involved in the synthesis of vitamin C that it is required to be obtained from their diets (e.g., beverages and/or supplements). Here, we have prepared a paper based kit to detect the concentration of Vitamin C presented in commercially available beverages. The evaluation provides the fast, simple and accurate results for detecting Vitamin C in the prepared paper based kit.
Silencing of Mutant p53 Leads to Suppression of Human Breast Xenograft Tumor Growth in vivo
Park, Won Ick ; Park, Se-Ra ; Park, Hyun-Joo ; Bae, Yun-Hee ; Ryu, Hyun Su ; Jang, Hye-Ock ; Bae, Moon-Kyoung ; Bae, Soo-Kyung ;
KSBB Journal, volume 31, issue 1, 2016, Pages 52~57
DOI : 10.7841/ksbbj.2016.31.1.52
Mutant p53 (R280K) is highly expressed in MDA-MB-231 triple-negative human breast cancer cells. Currently, we reported the role of mutant p53-R280K in mediating the survival of MDA-MB-231 cells in vitro. The present study was undertaken to determine whether mutant p53-R280K affects breast cancer cell growth in vivo. To this end, we used small interfering RNA to knockdown the level of mutant p53-R280K in MDA-MB-231 cells. Silencing of mutant p53-R280K in MDA-MB-231 cells causes substantial tumor regression of established xenografts in vivo. In xenograft model for breast cancer, silencing of mutant p53-R280K in MDA-MB-231 cells significantly inhibited the tumor growth. Moreover, TUNEL assay showed more occurrence of apoptotic cells in mutant p53-R280K silenced tumors compared to control. Our data indicate that mutant p53-R280K has an important role in mediating tumor growth of MDA-MB-231 cells in vivo. Taken together, this study suggests that endogenous mutant p53-R280K could be used as a therapeutic target for breast cancer cells harboring this TP53 missense mutation.
Isolation and Characterization of the Plant Growth Promoting Rhizobacterium, Arthrobacter scleromae SYE-3 on the Yam Growth
Hong, Sun Hwa ; Kim, Ji Seul ; Sim, Jun Gyu ; Lee, Eun Young ;
KSBB Journal, volume 31, issue 1, 2016, Pages 58~65
DOI : 10.7841/ksbbj.2016.31.1.58
In this study, Arthrobacter scleromae SYE-3, which was isolated from indigenous plant in a subtropical region, Neigeria, with plant growth promoting activity was evaluated to determine the optimal culture condition. A bacterial strain SYE-3 had the IAA productivity (
) and ACC deaminase activity (
at 72 hours). Also, optimal culture conditions such as temperature and pH of strain SYE-3 were
and 10 in LB medium, respectively. Strain SYE-3 had up to 3% salt tolerance in the LB medium. Plant growth promoting ability of strain SYE-3 using yam (Dioscorea japonica Thunb.) was evaluated. As a result, strain SYE-3 had showed very powerful effect on the increase of the shoot length and root biomass of yam (190.0% and 282.41% increase for 112 days, respectively). These results indicated that Arthrobacter scleromae SYE-3 can serve as a promising microbial resource for the biofertilizers of subtropical crops.
Effects of Storage-protein 2 Derived from Silkworm Hemolymph on Reduction of Aggregation and Cell Death in CHO Cells
Lim, Jin-Hyuk ; Cha, Hyun-Myoung ; Kim, Z-Hun ; Choi, Yong-Soo ; Kim, Dong-Il ;
KSBB Journal, volume 31, issue 1, 2016, Pages 66~72
DOI : 10.7841/ksbbj.2016.31.1.66
Chinese hamster ovary (CHO) cells have been widely used for production of various recombinant proteins such as cytokines and monoclonal antibodies. The cell aggregation and cell death in CHO cell culture directly affect cell viability, and productivity and quality of products. In this study, we investigated preventing effects of storage-protein 2 (SP2) derived from silkworm hemolymph on cell aggregation and cell death in CHO cell culture producing albuminerythropoietin (Alb-EPO). The viable cell density in the culture supplemented with 2 mg/mL SP2 was 1.71-fold higher than that in control culture. Increased titer of Alb-EPO was also found in the culture with SP2. Morphology of CHO cells in SP2 supplemented cultures did not differ from that of control. In addition, the cell aggregation rate of the SP2 cultures was reduced 20% compared to the control. Finally, we confirmed that the apoptosis was strongly suppressed by addition of SP2 in the cultures. These results clearly demonstrate that SP2 can be served as an effective supplement for enhancing titer of Alb-EPO via reducing cell aggregation and cell death.
Bioethanol Production by using Wasted MDF
Kang, Yang-Rae ; Hwang, Jin-Sik ; Bae, Ki-Han ; Cho, Hoon-Ho ; Lee, Eun-Jeong ; Cho, Young-Son ; Nam, Ki-Du ;
KSBB Journal, volume 31, issue 1, 2016, Pages 73~78
DOI : 10.7841/ksbbj.2016.31.1.73
The aim of this study attempted to verify the possibility of bioethanol production using wasted medium density fiberboard (wMDF). In order to produce bioethanol from wood cellulosic materials must be carried out the process of pretreatment, saccharification, fermentation and distillation. First, the wMDF was pretreated using sodium chlorite and pretreated wMDF was prepared to 8% slurry and then slurry was saccharified with the commercial enzyme (Cellic CTec3). The fermentable sugar and pH of saccharified substrate were about 5.5% glucose and 4.4, respectively. Herein we compared the results of ethanol yield according to the nutrients added or without addition to increase ethanol yield. Ethanol fermentation was finished in about 24 hours, but it was delayed in experimental group without nutrients. Ethanol content and fermentation ratio of the final fermented mash prepared by utilizing jar fermenter was 25.40 g/L and 86.64%, respectively. At this time, the maximum ethanol productivity was confirmed as 1.78 g/Lh (ethanol content 21.38 g/L, 12 h), and the overall ethanol productivity was 1.05 g/Lh (ethanol content 25.27 g/L, 24 h). Using fermented liquid we could produced bioethanol 95.37% by continuous distillator packed with copper element in laboratory scale. These results show that wMDF has a potential valuable for bioethanol production.
Production of Biobutanol by Clostridium beijerinckii from Water Hyacinth
Park, Bong-Je ; Park, Hye Min ; Yun, Hyun Shik ;
KSBB Journal, volume 31, issue 1, 2016, Pages 79~84
DOI : 10.7841/ksbbj.2016.31.1.79
Biofuel has been considered as promising renewable energy to solve various problems that result from increasing usage of fossil fuels since the early 20th century. In terms of chemical and physical properties as fuel, biobutanol has more merits than bioethanol. It could replace gasoline for transportation and industrial demand is increasing significantly. Production of butanol can be achieved by chemical synthesis or by microbial fermentation. The water hyacinth, an aquatic macrophyte, originated from tropical South America but is currently distributed all over the world. Water hyacinth has excellent water purification capacity and it can be utilized as animal feed, organic fertilizer, and biomass feedstock. However, it can cause problems in the rivers and lakes due to its rapid growth and dense mats formation. In this study, the potential of water hyacinth was evaluated as a lignocellulosic biomass feedstock in biobutanol fermentation by using Clostridium beijerinckii. Water hyacinth was converted to water hyacinth hydrolysate medium through pretreatment and saccharification. It was found that productivity of water hyacinth hydrolysate medium on biobutanol production was comparable to general medium.
Production of Lactic Acid from Water Hyacinth by Lactobacillus spp.
Jullihar, Randy ; Noh, Yong Ho ; Park, Hye Min ; Yun, Hyun Shik ;
KSBB Journal, volume 31, issue 1, 2016, Pages 85~89
DOI : 10.7841/ksbbj.2016.31.1.85
Lactic acid fermentations were conducted using water hyacinth. It is known that the pretreatment and enzyme hydrolysis process optimize the potential of water hyacinth. Lactic acid produced by using lactic acid bacteria. All cells were grown at
and initial pH 5.5. Lactic acid production was measured by HPLC. All Lactobacillus strains could produce lactic acid from pretreated water hyacinth. The highest lactic acid was achieved when lactic acid fermentation was carried out by L. delbrueckii for D-form and L. helveticus for L-form lactic acid production. The lactic acid concentration was 10.70 g/L by L. delbrueckii and it converted glucose in the medium to lactic acid, almost perfectly. Lactic acid production became higher when fermentation was carried out at a controlled pH 5.5. Lactic acid yield and productivity were 0.52 g/g and 0.19 g/L/h for L. helveticus, while L. delbrueckii was 0.64 g/g and 0.27 g/L/h. This study showed that water hyacinth medium could be alternative medium which can replace the complex and expensive medium for growing Lactobacillus strains in production of lactic acid.