A lateral flow immunoassay (LFIA) method using carbon nanodot@silica as a signaling material was developed for analyzing the concentration of retinol-binding protein 4 (RBP4), one of the lung cancer biomarkers. Instead of antibodies mainly used as bioreceptors in nitrocellulose membranes in LFIA for protein detection, aptamers that are more economical, easy to store for a long time, and have strong affinities toward specific target proteins were used. A 5' terminal of biotin-modified aptamer specific to RBP4 was first reacted with neutravidin followed by spraying the mixture on the membrane in order to immobilize the aptamer in a porous membrane by the strong binding affinity between biotin and neutravidin. Carbon nanodot@silica nanoparticles with blue fluorescent signal covalently conjugated to the RBP4 antibody, and RBP4 were injected in a lateral flow manner on to the surface bound aptamer to form a sandwich complex. Surfactant concentrations, ionic strength, and additional blocking reagents were added to the running buffer solution to optimize the fluorescent signal off from the sandwich complex which was correlated to the concentration of RBP4. A 10 mM Tris (pH 7.4) running buffer containing 150 mM NaCl and 0.05% Tween-20 with 0.6 M ethanolamine as a blocking agent showed the optimum assay condition for carbon nanodot@silica-based LFIA. The results indicate that an aptamer, more economical and easier to store for a long time can be used as an alternative immobilizing probe for antibody in a LFIA device which can be used as a point-of-care diagnosis kit for lung cancer diseases.
Journal of Practical Agriculture & Fisheries Research
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v.25
no.1
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pp.20-35
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2023
Chemical preservatives have a good effect on antibacterial activity, but many side effects on the human body have been reported. Recently, the development of natural preservatives that are harmless to the human body and have preservative functions and self-efficacy is active. In addition, in order to increase the absorption rate of natural products by the human body, the method of fermentation using strains is also increasing. Therefore, this study selected varieties that are harmless to the human body and have good antibacterial activity. 1. The yield of origin, thickness and solvent was investigated. Scutellaria baicalensis Georgi was made in China and received a yield of 21.88% from 50% ethyl alcohol extract. Salvia miltiorrhiza Bunge was made in Korea and received a yield of 25.62% from 50% ethyl alcohol extract. Dryopteris crassirhizoma Nakai was made in China and received a yield of 6.50% from 70% ethyl alcohol extract. 2. The solid fermentation with the S. baicalensis and S. miltiorrhiza with B. Subtilis yield gained 24.40%, 39.30%, and D. crassirhizoma obtained 11.10% yield when fermented with L. casei. 3. After the liquid fermentation, a clear zone of 9mm was identified for the S. aureus strain in the S. baicalensis, and the antibacterial activity was not confirmed in S. miltiorrhiza and D. crassirhizoma. 4. When the S. baicalensis was fermented with L. Casei, it showed high antibacterial activity in C. albicans and S. aureus. S. miltiorrhiza showed antibacterial activity in S. aureus when it was solid with S. cerevisiae. When the spectators were solid with L. casei and S. cerevisiae, antibacterial activity was high in E. coli and S. aureus. Overall, the antibacterial activity after fermentation was much higher than when fermented. 5. The change in active ingredients was baicalin 101.57, baicalein 28.26, and wogonin 5.33mg/g in the S. baicalensis that did not ferment solid. When solid fermentation with S. cerevisiae, the content of baicalinin with baicalin 94.31, baicalein 30.41, and wogonin 3.57mg/g was found to have increased. S. miltiorrhiza that was not fermented, salvianolic acid A was 1.82mg/g, and when fermented with S. cerevisiae, it increased to 5.70mg/g. The active ingredients of the spectators were flavaspidic acid AP, flavaspidic acid PB, flavaspidic acid AB, and flavaspidic acid BB.
Plantago asiatica L. (P. asiatica) has been used as one of the popular folk medicines in Asia for human health care practices. Various activities of P. asiatica have been reported, such as anti-oxidant, anti-glycation, anti-inflammatory and hepatoprotective activity. Therefore, the potential of P. asiatica to reduce oxidative stress has been studied in several ways for over 20 years, especially at liver and kidney. However no investigation has been reported revealing its protective effect on prostate. Method: Treatment of P. asiatica leaf ethanolic extract (PLE) (1 g/kg body weight (b.w.), 2 g/kg b.w., or 4 g/kg b.w.) were given separately to animals for pretreatment once per day for 7 days, and on the seventh day ferric nitrilotriacetate (Fe-NTA; 0.24 mmol Fe/kg b.w.), which is known as an oxidative stress-inducer at prostate, was administrated by i.p to negative control group. At the end of the study period, dissection was carried out for detecting the prostate protective effect of PLE. Result: Fe-NTA-treated animals produced reactive oxygen species (ROS) resulting in depletion of antioxidant biomaker, such as glutathione (GSH), glutathione reductase (GR), and glutathione s-transferase (GST) and increase of lipid peroxidation in prostate. However, PLE pretreatment resulted in an increase in the GSH, GST and GR levels concentration dependent manner and in an significant decrease in the levels of lipid peroxidation. Conclusion: Our data suggest that PLE may be effective in protecting oxidative stress-induced damage of prostate, and PLE may be an chemopreventive agent against Fe-NTA-mediated prostate oxidative damage.
Journal of the Korean Society of Food Science and Nutrition
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v.45
no.7
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pp.948-957
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2016
We previously developed an herbal composition (HemoHIM) based on the water extracts of Angelica gigas radix, Cnidium officinale rhizoma, and Paeonia japonica radix to protect and recover hematopoietic and intestinal tissues against radiation injuries. In this study, to develop a composition with improved activities based on enhanced fat-soluble polyphenol contents, we prepared a new herbal composition, MH-30, from the above three herbs by 30% ethanol extraction and hot water extraction. HPLC analysis of the ethanol fractions of MH-30 and HemoHIM revealed that MH-30 had higher contents of many fat-soluble polyphenol compounds than HemoHIM (8.7-fold increase for decursin), whereas contents of water-soluble polyphenol compounds showed little differences between the two compositions. Then, we evaluated MH-30 and HemoHIM for their in vitro antioxidant and immune cell-stimulating activities as well as in vivo protective effects against radiation injuries in hematopoietic and self-renewal tissues. In antioxidant activity assays, MH-30 showed higher hydroxyl radical scavenging activity than HemoHIM (1.4- to 1.9-fold for compositions and 2.3- to 4.5-fold for ethanol fractions). On the other hand, MH-30 and HemoHIM exhibited similar immune cell-stimulating activities as measured by in vitro lymphocyte proliferation. MH-30 increased endogenous spleen colony formation, decreased bone marrow cell apoptosis, and enhanced survival of intestinal crypts in irradiated mice, demonstrating effective protection of MH-30 against radiation-induced injuries in hematopoietic and self-renewal tissues. The 30-day survival rate of lethally irradiated mice, a comprehensive index for radioprotective efficacy, was also elevated by MH-30. Noticeably, MH-30 showed higher protective effects than HemoHIM in all mouse experiments. These results demonstrate that MH-30 can protect hematopoietic and self-renewal tissues against radiation injuries more effectively than HemoHIM. Therefore, MH-30 can be a good candidate to reduce radiation injuries in hematopoietic and self-renewal tissues incurred by radiation accidents or cancer radiation therapy.
Lee, Sang Lae;Song, Ba Reum;Shin, Hyuk Soo;Lee, Yun Ju;Park, Soo Nam
Journal of the Society of Cosmetic Scientists of Korea
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v.44
no.3
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pp.349-362
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2018
An annual plant, Eclipta prostrata (Linn) is a member of the Asteraceae plant family and inhabited in tropical or subtropical regions of the world. Through many previous researches, E. prostrata has been extensively studied for its hepatoprotective effect, antivenom potential against viper venom, antioxidant, hair-growth, wound-healing efficacy and so on. In this study, for better understanding of the potential of E. prostrata as skin protectant, we conducted the experiments evaluating the antioxidant and antiaging efficacy. To this end, 50% ethanolic extract of E. prostrata and its ethyl acetate fraction were prepared and investigated. For the evaluation of antioxidant capacity of the samples, $FSC_{50}$ and $OSC_{50}$ were estimated. As a result, $OSC_{50}$ of ethyl acetate fraction was 2.7 times superior to $OSC_{50}$ of L-ascorbic acid, a well known antioxidant agent. Futhermore E. prostrata showed notable reactive oxygen species (ROS) scavenging effect and protective effect against $H_2O_2$ in the celluar level as well. Especially, in the $^1O_2$ induced hemolysis test, $64{\mu}g/mL$ of ethyl acetate fraction showed greater than 6 times increased retardation effect compare to control which means E. prostrata has remarkable antioxidant capacity. To validate the antiaging effect of the samples, we conducted elastase inhibition assay using elastase solution extracted from human skin fibroblasts, Hs68. As a result, $16{\mu}g/mL$ of each sample showed 6.8% and 14.0% of elastase inhibition respectively. Finally, antimicrobial activity of E. prostrata was assessed to validate the possibility as alternative preservative. From the result, ethyl acetate fraction showed oustanding antimicrobial activity as of methyl paraben, a well known chemical preservative. In conclusion, these results suggest that E. prostrata can be used as natural skin protectant or preservative as natural ingredient in food or cosmetics industry.
Jeong, Jin-Woo;Lee, Hye Hyeon;Kim, Hong Jae;Lee, Ki Won;Kim, Ki Young;Kim, Sung Goo;Hong, Su-Hyun;Kim, Bum Hoi;Park, Cheol;Choi, Yung Hyun
Journal of Life Science
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v.27
no.10
/
pp.1207-1214
/
2017
Schisandrae Fructus (SF), the fruit of Schisandra chinensis (Turcz.) Baill., is widely used in traditional medicine for the treatment of a number of chronic diseases. SF extracts have been recently reported to attenuate the inflammatory responses in SW1353 human chondrocyte cells in in vitro and monosodium iodoacetate (MIA)-induced cartilage degradation in in vivo osteoarthritis (OA) models. However, their protective and therapeutic potentials against OA in primary culture chondrocytes and animal models remain unclear. Therefore, we investigated the effects of the ethanol extract of SF on the activity of matrix metalloproteinases (MMPs), biomarkers for diagnosis of OA, on interleukin $(IL)-1{\beta}-induced$ primary cultured rat cartilage chondrocytes and MIA-induced osteoarthritis in a rat model. Our data indicated that SF treatment significantly reduced the mRNA expression and enzyme activity of MMP-1, -3 and -13 in $IL-1{\beta}-induced$ primary cultured rat cartilage chondrocytes. The chondro-protective effects of SF were then analyzed in a rat OA model using a single intra-articular injection of MIA in the right knee joint. According to our results, the elevated levels of MMP-1 and -3 were markedly ameliorated by SF administration. Collectively, these findings indicate that SF could be a candidate for the treatment of OA.
Choi, Eun Ok;Kwon, Da Hye;Kim, Min Young;Hwang-Bo, Hyun;Kim, Hong Jae;Ahn, Kyu Im;Jeong, Jin-Woo;Lee, Ki Won;Kim, Ki Young;Kim, Sung Goo;Choi, Young Whan;Hong, Su Hyun;Park, Cheol;Choi, Yung Hyun
Journal of Life Science
/
v.26
no.10
/
pp.1207-1213
/
2016
Schisandrae fructus (SF) and Mori folium (MF) have been used as traditional medicines for thousands of years in parts of Asia, including Korea, China, and Japan. Recent researches on SF and MF have documented a wide spectrum of therapeutic properties, including anti-microbial, anti-inflammatory, anti-oxidative, immunomodulatory and anti-angiogenesis effects. However, the toxicity and safety of SF and MF, and their mixture (medicinal herber mixture, MHMIX) were not confirmed. Therefore, this study was performed to evaluate the acute toxicity and safety of SF, MF and MHMIX. SF, MF and MHMIX were orally administered at a dose of 5,000 mg/kg in ICR mice. Animals were monitored for the mortality and changes in the body weight, clinical signs and gross observation during the 14 days after dosing, upon necropsy. We also measured parameters of organ weight, clinical chemistry, and hematology. No dead and no clinical signs were found during the experiment period after administration of a single oral dose of SF, MF and MHMIX. There were no adverse effects on clinical signs, body weight, or organ weight and no gross pathological findings in any treatment group. Therefore, LD50 value of SF, MF and MHMIX may be over 5,000 mg/kg and it may have no side toxic effect to ICR mice. The results on the single-dose toxicity of SF, MF and MHMIX indicate that it is not possible to reach oral dose levels related to death or dose levels with any harmful side effects.
The extraction of polyphenol and flavonoid from citrus peel was performed by the ethanol, sugar, hot water (80$^{\circ}C$), and subcritical water extraction methods. The maximum yields of total polyphenolic compounds (27.25${\pm}$1.33 mg QE/g DCP, QE and DCP indicate quercetin equivalent and dried citrus peel, respectively) and flavonoids (7.31${\pm}$0.41 mg QE/g DCP) were obtained by subcritical water extraction (SWE) with operating conditions of 190$^{\circ}C$, 1300 psi, and 10 min. The yields by SWE were over 7.2-, and 8.5-fold higher than those of total polyphenols (3.79${\pm}$0.73 mg QE/g DCP) and flavonoids (0.86${\pm}$0.27 mg QE/g DCP) obtained using the ethanol extraction, which showed the highest extraction efficiency among tested conventional methods, respectively. Antioxidant activities of extracts obtained by different methods showed no significant differences. However, the relative antioxidant yield per 1 g dried citrus peel by SWE (190$^{\circ}C$, 10 min) was over 9.5-fold higher than that by the ethanol extraction.
Lettuce (Lactuca sativa L.) is one of the most popular green leafy vegetables, and it contains various beneficial components including polyphenolic compounds and has been known to possess various biological functions such as anti-microbial, anti-oxidative, and anti-inflammatory activities. In the present study, we prepared ethanol extract of dried lettuce (DLE) and investigated its anti-inflammatory activity. To evaluate the anti-inflammatory activity of DLE, nitric oxide (NO) production was measured in LPS-activated mouse macrophage RAW 264.7 cells. DLE significantly suppressed NO production in these cells without affecting cell viabilities while resveratrol was used as a positive control. DLE dramatically decreased the expression of pro-inflammatory genes such as iNOS and COX-2 at the mRNA and protein levels and reduced the expression of several cytokines including $IL-1{\alpha}$, $IL-1{\beta}$, IL-1F6, $TNF-{\alpha}$, CSF2 and CXCL10. In addition, DLE suppressed phosphorylation of MAPKs and the nuclear translocation of $NF-{\kappa}B$ p65 indicating DLE shows its anti-inflammatory activity via regulating MAPKs pathway and $NF-{\kappa}B$ pathways. And also, DLE reduced the production of reactive oxygen species in a dose-dependent manner. DLE increased HO-1 protein expression, and also increased the nuclear translocation of Nrf2. Overall, our results suggest that lettuce down-regulate various pro-inflammatory genes and have its anti-inflammatory activity via regulating MAPKs, $NF-{\kappa}B$, and Nrf2/HO-1 pathways.
Park, Ji Yeong;Kwak, Kyu-Won;Choi, Ji-Yeon;Lee, Si-Eun;Kim, Yong-Soon;Koo, Bonwoo;Kim, Eunsun;Park, Kwanho;Kim, Sun Young
Journal of Life Science
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v.31
no.12
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pp.1094-1099
/
2021
Hermetia illucens (Black soldier fly) is attracting attention as an environmental purification insect because it can supply a wide range of by-products of the agricultural food industry. Also, it has a potential feed for fish, birds, and pets due to a short life cycle and excellent nutritional components. Several pharmacological effects, including antimicrobial, of H. illucens have been reported. However, no study has focused on antiobesity effects of ethanol extract of H. illucens. In this study, we aimed to assess the anti-obesity effects of ethanol extract of H. illucens larvae (HIE) through inhibition of differentiation of 3T3-L1 preadipocytes into adipocytes. The amount of lipid accumulated in adipocytes was measured by oil red-O staining, and the inhibitory effect on adipogenesis was confirmed. The expression levels of factors related to adipocyte differentiation and fat synthesis were determined using Western blot analysis. Lipid droplet formation in adipocytes was remarkably inhibited by HIE. In addition, treatment with 400 ㎍/ml of HIE significantly reduced the expression levels of peroxisome proliferator-activated receptor γ and CCAAT/enhancer-binding protein α-transcription factors involved in adipocyte differentiation. Therefore, the results of this study indicate that HIE is a potential anti-obesity agent because it inhibits adipocyte differentiation.
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