Tenofovir nanoparticles are novel therapeutic intervention in human immunodeficiency virus (HIV) infection reaching the virus in their sanctuary sites. However, there has been no systemic toxicity testing of this formulation despite global concerns on the safety of nano drugs. Therefore, this study was designed to investigate the toxicity of Tenofovir nanoparticle (NTDF) on the liver and kidney using an animal model. Fifteen adult male Sprague-Dawley (SD) rats maintained at the animal house of the biomedical resources unit of the University of KwaZulu-Natal were weighed and divided into three groups. Control animals (A) were administered with normal saline (NS). The therapeutic doses of Tenofovir (TDF) and nanoparticles of Tenofovir (NTDF) were administered to group B and C and observed for signs of stress for four weeks after which animals were weighed and sacrificed. Liver and kidney were removed and fixed in formal saline, processed and stained using H/E, PAS and MT stains for light microscopy. Serum was obtained for renal function test (RFT) and liver function test (LFT). Cellular measurements and capturing were done using ImageJ and Leica software 2.0. Data were analysed using graph pad 6, p values < 0.05 were significant. We observed no signs of behavioural toxicity and no mortality during this study, however, in the kidneys, we reported mild morphological perturbations widening of Bowman's space, and vacuolations in glomerulus and tubules of TDF and NTDF animals. Also, there was a significant elevation of glycogen deposition in NTDF and TDF animals when compared with control. In the liver, there were mild histological changes with widening of sinusoidal spaces, vacuolations in hepatocytes and elevation of glycogen deposition in TDF and NTDF administered animals. In addition to this, there were no significant differences in stereological measurements and cell count, LFT, RFT, weight changes and organo-somatic index between treatment groups and control. In conclusion, NTDF and TDF in therapeutic doses can lead to mild hepatic and renal histological damage. Further studies are needed to understand the precise genetic mechanism.
Journal of the Korean Society of Food Science and Nutrition
/
v.34
no.3
/
pp.361-365
/
2005
For the EXP 1, the objective of this study was to determine the effect of MSM (methyl sulfonyl methane) supplementation on growth performance and nutrient digestibility in pigs. Sixty crossbred (Landrace × Yorkshire × Duroc) pigs (48.15±0.15㎏ average initial body weight) were used in a 35 days growth assay. Dietary treatments included 1) Control (basal diet), 2) T1 (basal diet+0.01% MSM) and 3) T2 (basal diet+0.02% MSM). For overall period, average daily gain, average daily feed intake and feed efficiency were not significantly different among the treatments (p&gt;0.05). Digestibilies of DM, N, Ca and P were not significant defferences (p&gt;0.05). For the EXP 2, the objective of this study was to determine the effect of MSM and antibiotic supplementation on growth performance and nutrient digestibility in pigs. One hundred crossbred (Landrace × Yorkshire × Duroc) pigs (33.85±0.15㎏ average initial body weight) were used in a 42 days growth assay. Dietary treatments included 1) Control (basal diet), 2) T1 (basal diet+0.05% neomycin sulfate, 0.055% oxytetracycline), 3) T2 (Con diet+0.01% MSM) and T3 (T1+0.01% MSM). For overall period, average daily gain and average daily feed intake of pigs fed T3, T2 diets were higher than those of CON diet (p&lt;0.05). Average daily gain was not significantly different between T2 and T3. However, food efficiency of pigs fed CON was the highest among the treatments (p&lt;0.05). Pigs fed T3 diet increased nutrient digestibility compared to other treatments (p&lt;0.05). In conclusion, the results suggest that the dietary addition of MSM and antibiotics into diets for pigs affect growth performance and nutrient digestibility.
Soyoung Jeon;Danu Kim;Jeonghyeon Byeon;Daehyun Shin;Minjune Yang;Minhee Lee
Economic and Environmental Geology
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v.56
no.2
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pp.125-138
/
2023
Most of previous cesium (Cs) sorbents have limitations on the treatment in the large-scale water system having low Cs concentration and high ion strength. In this study, the new Cs sorbent that is eco-friendly and has a high Cs removal efficiency was developed by improving the coal mine drainage treated sludge (hereafter 'CMDS') with the addition of Na and S. The sludge produced through the treatment process for the mine drainage originating from the abandoned coal mine was used as the primary material for developing the new Cs sorbent because of its high Ca and Fe contents. The CMDS was improved by adding Na and S during the heat treatment process (hereafter 'Na-S-CMDS' for the developed sorbent in this study). Laboratory experiments and the sorption model studies were performed to evaluate the Cs sorption capacity and to understand the Cs sorption mechanisms of the Na-S-CMDS. The physicochemical and mineralogical properties of the Na-S-CMDS were also investigated through various analyses, such as XRF, XRD, SEM/EDS, XPS, etc. From results of batch sorption experiments, the Na-S-CMDS showed the fast sorption rate (in equilibrium within few hours) and the very high Cs removal efficiency (> 90.0%) even at the low Cs concentration in solution (< 0.5 mg/L). The experimental results were well fitted to the Langmuir isotherm model, suggesting the mostly monolayer coverage sorption of the Cs on the Na-S-CMDS. The Cs sorption kinetic model studies supported that the Cs sorption tendency of the Na-S-CMDS was similar to the pseudo-second-order model curve and more complicated chemical sorption process could occur rather than the simple physical adsorption. Results of XRF and XRD analyses for the Na-S-CMDS after the Cs sorption showed that the Na content clearly decreased in the Na-S-CMDS and the erdite (NaFeS2·2(H2O)) was disappeared, suggesting that the active ion exchange between Na+ and Cs+ occurred on the Na-S-CMDS during the Cs sorption process. From results of the XPS analysis, the strong interaction between Cs and S in Na-S-CMDS was investigated and the high Cs sorption capacity was resulted from the binding between Cs and S (or S-complex). Results from this study supported that the Na-S-CMDS has an outstanding potential to remove the Cs from radioactive contaminated water systems such as seawater and groundwater, which have high ion strength but low Cs concentration.
Kim, Tae-Hoon;Shin, Seung-Ryeul;Kim, Tae-Wan;Lee, In-Chul;Park, Moon-Young;Jo, Cheo-Run
Food Science and Preservation
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v.16
no.3
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pp.435-441
/
2009
Activity-guided isolation from the ethylacetate (EtOAc)-soluble portion of a methanolic extract of the seeds of Eriobotrya japonica, using several bioassays, led to the isolation and identification of six phenolic compounds of previously known structure: benzaldehyde (1), chlorogenic acid (2), caffeic acid (3), benzoic acid (4), ferulic acid (5), and amygdalin (6). Of these, benzaldehyde (1) exhibited tyrosinase inhibitory activity in a bioassay. In addition, chlorogenic acid (2) and caffeic acid (3) were found to have strong antioxidative effects on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging and superoxide dismutase (SOD)-like activity.
Hwang, Kyu-Ho;Lee, Kyung-Il;Joo, Seung-Ki;Kang, Tak
Journal of the Korean Crystal Growth and Crystal Technology
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v.1
no.2
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pp.79-93
/
1991
With the advent of ULSI, many problems in previous metallization techniques and interconnection materials have become more serious. In this work, selective deposition of copper to fill the submicron contact has been tried.
After forming electro-deposited copper films on p-type (100) silicon wafer using 0.75M $CuSO_4{\cdot}$5H_2O$ as an electrolyte, the effect of deposition time, current density and concentration of an additive on film properties were investigated. Film thickness, particle size and resistivity were analyzed by Alpha Step, SEM and 4 - point probe measurement respectively.
The deposition rate was about $0.5-0.6\mu\textrm{m}$/min at $2A/dm^2$ and the particle size increased with increasing current density. The resistivities of electro-deposited copper films were about $3-6{\mu}{\Omega}{\cdot}$cm for the particle size above $4000{\AA}$. By the addition of 0.2 g/l gelatin, the particle size was reduced to less than $0.1{\mu}m $ and selective plugging of copper on submicron contacts could be successfully achieved.
Journal of The Korean Society of Grassland and Forage Science
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v.27
no.2
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pp.109-116
/
2007
Environmental stress is the major limiting factor in plant productivity. As an effort to solve the global food and environmental problems using the plant biotechnology, we have developed transgenic tall fescue (Festuca arundinacea Schreb.) plants via Agrobacterium-mediated gene transfer method. To develop transgenic tall fescue plants with enhanced tolerance to the environmental stresses, both CuZn superoxide dismutase (CuZnSOD) and ascorbate peroxidase (APX) genes were incorporated in a pIG121 binary vector and the both of the genes were controlled separately by an oxidative stress-inducible sweet potato peroxidase 2 (SWPA2) premoter expressed in chloroplasts. Leaf discs of transgenic plants showed 10-30% less damage compared to the wild-type when they exposed to a wide range of environmental stresses including methyl viologen (MV), $H_2O_2$ and heavy metals. In addition, when $200{\mu}M$ MV was sprayed onto the whole plants, transgenic plants showed a significant reduction of visible damage compared to wild-type plants that were almost damaged. These results suggest that over expression of CuZnSOD and APX genes in transgenic plants might be a useful strategy to protect the crops against a wide range of environmental stresses.
Park, Sang Mi;Jung, Eun Hye;Kim, Jae Kwang;Jegal, Kyung Hwan;Park, Chung A;Cho, Il Je;Kim, Sang Chan
Journal of Ginseng Research
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v.41
no.3
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pp.392-402
/
2017
Background: Previously, we reported that Korean Red Ginseng inhibited liver fibrosis in mice and reduced the expressions of fibrogenic genes in hepatic stellate cells (HSCs). The present study was undertaken to identify the major ginsenoside responsible for reducing the numbers of HSCs and the underlying mechanism involved. Methods: Using LX-2 cells (a human immortalized HSC line) and primary activated HSCs, MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide) assays were conducted to examine the cytotoxic effects of ginsenosides. $H_2O_2$ productions, glutathione contents, lactate dehydrogenase activities, mitochondrial membrane permeabilities, apoptotic cell subpopulations, caspase-3/-7 activities, transferase dUTP nick end labeling (TUNEL) staining, and immunoblot analysis were performed to elucidate the molecular mechanism responsible for ginsenoside-mediated cytotoxicity. Involvement of the AMP-activated protein kinase (AMPK)-related signaling pathway was examined using a chemical inhibitor and small interfering RNA (siRNA) transfection. Results and conclusion: Of the 11 ginsenosides tested, 20S-protopanaxadiol (PPD) showed the most potent cytotoxic activity in both LX-2 cells and primary activated HSCs. Oxidative stress-mediated apoptosis induced by 20S-PPD was blocked by N-acetyl-$\text\tiny L$-cysteine pretreatment. In addition, 20S-PPD concentration-dependently increased the phosphorylation of AMPK, and compound C prevented 20S-PPD-induced cytotoxicity and mitochondrial dysfunction. Moreover, 20S-PPD increased the phosphorylation of liver kinase B1 (LKB1), an upstream kinase of AMPK. Likewise, transfection of LX-2 cells with LKB1 siRNA reduced the cytotoxic effect of 20S-PPD. Thus, 20S-PPD appears to induce HSC apoptosis by activating LKB1-AMPK and to be a therapeutic candidate for the prevention or treatment of liver fibrosis.
The wild ginseng culture by-products(WGCB) was added to the laying hens diets. A total of 420 Lohmann Brown laying hens were alloted to five levels of drinking water containing WGCB 0, 0.4, 0.8 1.6, $3.2\%$with seven replications and fed com-soybean meal based diets contained ME 2,800 kcal/kg, CP $16\%$. Laying Performance, egg quality, egg yolk fatty acid and cholesterol concentration were measured. Egg Production and daily e99 mass were significantly lower(p<0.05) in birds fed the WGCB $3.2\%$ compared with no WGCB group, but showed no significant effect in other treatments. Feed efficiency of birds fed $0.4\%$ WGCB showed the lowest of all treatments(p<0.05). Eggshell thickness was increased(p<0.05) by WGCB supplementation, whereas eggshell breaking strength, haugh unit and yolk color index were not affected. No significant change in yolk fatty acids and cholesterol were observed by the addition of WGCB.
Kim, Hwa-Jin;You, Mi-Kyoung;Lee, Young-Hyun;Kim, Hyun-Jung;Adhikari, Deepak;Kim, Hyeon-A
Nutrition Research and Practice
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v.12
no.6
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pp.494-502
/
2018
BACKGROUND/OBJECTIVES: Reducing the number of adipocytes by inducing apoptosis of mature adipocytes as well as suppressing differentiation of preadipocytes plays an important role in preventing obesity. This study examines the anti-adipogenic and pro-apoptotic effect of red pepper seed water extract (RPS) prepared at $4^{\circ}C$ (RPS4) in 3T3-L1 cells. MATERIALS/METHODS: Effect of RPS4 or its fractions on lipid accumulation was determined in 3T3-L1 cells using oil red O (ORO) staining. The expressions of AMP-activated protein kinase (AMPK) and adipogenic associated proteins [peroxisome proliferator-activated receptor-${\gamma}$ ($PPAR-{\gamma}$), CCAAT/enhancer-binding proteins ${\alpha}$ (C/EBP ${\alpha}$), sterol regulatory element binding protein-1c (SREBP-1c), fatty acid synthase (FAS), and acetyl-CoA carboxylase (ACC)] were measured in 3T3-L1 cells treated with RPS4. Apoptosis and the expression of Akt and Bcl-2 family proteins [B-cell lymphoma 2 (Bcl-2), Bcl-2-associated death promoter (Bad), Bcl-2 like protein 4 (Bax), Bal-2 homologous antagonist/killer (Bak)] were measured in mature 3T3-L1 cells treated with RPS4. RESULTS: Treatment of RPS4 ($0-75{\mu}g/mL$) or its fractions ($0-50{\mu}g/mL$) for 24 h did not have an apparent cytotoxicity on pre and mature 3T3-L1 cells. RPS4 significantly suppressed differentiation and cellular lipid accumulation by increasing the phosphorylation of AMPK and reducing the expression of $PPAR-{\gamma}$, C/EBP ${\alpha}$, SREBP-1c, FAS, and ACC. In addition, all fractions except ethyl acetate fraction significantly suppressed cellular lipid accumulation. RPS4 induced the apoptosis of mature adipocytes by hypophosphorylating Akt, increasing the expression of the pro-apoptotic proteins, Bak, Bax, and Bad, and reducing the expression of the anti-apoptotic proteins, Bcl-2 and p-Bad. CONCLUSIONS: These finding suggest that RPS4 can reduce the numbers as well as the size of adipocytes and might useful for preventing and treating obesity.
The present study investigated anti-oxidative and anti-inflammatory activity of glycoprotein isolated from Morus Indica Linne (MIL glycoprotein). We found that MIL glycoprotein has a molecular weight of 32 kD and consists of carbohydrate (40.03%) and protein (59.97%), and that it has a strong scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydroxyl radical $({\cdot}OH)$, and superoxide anion $(O_2{\cdot}\;^-)$ radicals. In addition, MIL glycoprotein had a stable character and an optimal DPPH radical scavenging activity in the alkaline and neutral pH solution, and up to at 105. However, the results indicated that it has a minimal scavenging activity in the metal ionic solution ($Ca^{2+}$, $Mn^{2+}$, and $Mg^{2+}$) in the presence of EDTA. In addition, we further investigated whether MIL glycoprotein scavenges oxygen radicals and blocks inflammation-related signals in the bisphenol A (BPA)-stimulated Raw 264.7 cells. The results in this study showed that it has a character to scavenge the productions of reactive oxygen species (ROS) and nitric oxide (NO) dose-dependently. Also it blocked the activities of inflammation-related signals such as nuclear factor-kappa B ($NF-{\kappa}B$) and inducible nitric oxide synthase (iNOS). For example, it had an inhibitory effect on the activation of $NF-{\kappa}B$ (p50) and iNOS proteins at 200 ${\mu}g/mL$ MIL glycoprotein. Here, we speculate that MIL glycoprotein is one of natural antioxidants and of modulators of the BPA-induced inflammation.
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