Previous evidence showed ${\beta}1$, 3-N-acetylglucosaminyltransferase 8 (${\beta}3GnT8$), which can extend polylactosamine on N-glycans, to be highly expressed in some cancer cell lines and tissues, indicating roles in tumorigenesis. However, so far, the function of ${\beta}3GnT8$ in laryngeal carcinoma has not been characterized. To test any contribution, Hep-2 cells were stably transfected with sense or interference vectors to establish cell lines that overexpressed or were deficient in ${\beta}3GnT8$. Here we showed that cell proliferation was increased in ${\beta}3GnT8$ overexpressed cells but decreased in ${\beta}3GnT8$ knockdown cells using MTT. Furthermore, we demonstrated that change in ${\beta}3GnT8$ expression had significant effects on tumor growth in nude mice.We further provided data suggesting that overexpression of ${\beta}3GnT8$ enhanced the expression of matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9) at both the mRNA and protein levels, associated with shedding of tissue inhibitors of metalloproteinase TIMP-2. In addition, it caused increased production of transforming growth factor beta 1 (TGF-${\beta}1$), whereas ${\beta}3GnT8$ gene knockdown caused the reverse effect. The results may indicate a novel mechanism by which effects of ${\beta}3GnT8$ in regulating cellular proliferation are mediated, at least in partvia targeting MMPs/TIMPs and TGF-${\beta}1$ in laryngeal carcinoma Hep-2 cells. The finding may lay a foundation for further investigations into the ${\beta}3GnT8$ as a potential target for therapy of laryngeal carcinoma.
Warner, Crystal M.;Hahm, Sahng-Wook;Archibeque, Shawn L.;Wagner, John J.;Engle, Terry E.;Roman-Muniz, Ivette N.;Woerner, Dale;Sponsler, Mark;Han, Hyungchul
Journal of Animal Science and Technology
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v.57
no.6
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pp.25.1-25.7
/
2015
Rumen bypass fat is commonly added to increase energy intake in dairy cattle. The objective of this study is to examine the addition of rumen bypass fat during finishing period on performance and carcass characteristics in grain fed steers. This study was conducted as a completely randomized block design with 126 cross-bred steer calves (initial BW $471.5{\pm}7.5kg$) randomly assigned to pens with 9 steers/pen (n = 7 pens/treatment). Each pen was randomly assigned to one of two treatment groups; rumen bypass fat treatment (CCS, calcium soap of palm fatty acids) and control diet (CT, tallow). The diets were formulated to be isonitrogenous and isocaloric. Animals were fed twice daily at 110 % of the previous daily ad libitum intake. Blood from each sample was taken from the jugular vein. Muscle and adipose samples were collected from the longissimus dorsi regions. Feedlot performance and carcass characteristics were assessed. To examine adipogenic gene expression, quantitative real-time PCR was completed. Steers fed the CT had a greater level of performance for most of the parameters measured. The CT group had greater DMI (P < 0.05) and tended to have greater ADG (P < 0.10). Marbling score (P < 0.05) and quality grade (P < 0.05) were greater for steers fed the CT diet than those fed CCS. The longissimus muscle area tended to be greater (P < 0.10) in steers fed CT ($87.60cm^2$) than those fed CCS (84.88 cm2). The leptin mRNA expression was down-regulated (P < 0.05) in adipose tissue of steers fed a CCS when compared to those fed CT. These data suggest that calcium soap of palm fatty acids can be added to finishing diets without significant reduction in final body weight, although there may be modest reductions in marbling and quality scores.
Kim, Jeong Eun;Lee, So Young;Chang, Yunhee;Jin, Mu Hyun
Journal of the Society of Cosmetic Scientists of Korea
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v.46
no.2
/
pp.105-117
/
2020
Agaricus blazei Murill (Almond mushroom) has many beneficial effects, such as anti-cancer, immuneenhancement, and anti-obesity. Also, its skin benefits have been reported for antioxidant, anti-inflammatory, and whitening. In order to elucidate these effects, many studies have been conducted. In this study, we reconfirmed the skin efficacy of the extract of the mushrooms mushrooms. The Agaricus blazei extract showed inhibition of melanin synthesis, enhancement of collagen synthesis, and up-regulation of gene expression (hyaluronan syntahase-2, 3 and aquaporin-3) at 100 ㎍/mL. and identified the ingredients from the extract. We further investigated them to find an applicability as cosmetic ingredients. The ingredients were confirmed comparison of their spectroscopic data with literature values. They were identified as being ergosterol (1), 5-dihydroergosterol (2), cerevisterol (3), cerebroside B (4), cerebroside D (5), adenosine (6), and benzoic acid (7). Among these compounds, we evaluated skin efficacy for two cerebrosides and three ergosterol derivatives that have not been reported its efficacy. As a result, 5-dihydroergosterol (2) inhibited melanogenesis in B16F10 and promoted collagen biosynthesis in human dermal fibroblast. In addition, cerevisterol (3), cerebroside B (4), and cerebroside D (5) inhibited NO production in RAW 264.7 cell. In particular, cerebroside D (5) increased the expression of hyaluronan synthase-2 and aquaporin-3 genes in HaCaT. These results suggest that Agaricus blazei extract and isolated compounds can be used as cosmetic ingredients.
Kim, Dong Joon;Park, Young Soo;Kim, Nam Doo;Min, Sang Hyun;You, Yeon-Mi;Jung, Yuri;Koo, Han;Noh, Hanmi;Kim, Jung-Ae;Park, Kyung Chan;Yeom, Young Il
Molecules and Cells
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v.38
no.4
/
pp.373-379
/
2015
Pyruvate kinase M2 isoform (PKM2), a rate-limiting enzyme in the final step of glycolysis, is known to be associated with the metabolic rewiring of cancer cells, and considered an important cancer therapeutic target. Herein, we report a novel PKM2 activator, PA-12, which was identified via the molecular docking-based virtual screening. We demonstrate that PA-12 stimulates the pyruvate kinase activity of recombinant PKM2 in vitro, with a half-maximal activity concentration of $4.92{\mu}M$, and effectively suppresses both anchorage-dependent and -independent growth of lung cancer cells in non-essential amino acid-depleted medium. In addition, PA-12 blocked the nuclear translocalization of PKM2 in lung cancer cells, resulting in the inhibition of hypoxia response element (HRE)-mediated reporter activity as well as hypoxia-inducible factor 1 (HIF-1) target gene expression, eventually leading to the suppression of cell viability under hypoxia. We also verified that the effects of PA-12 were dependent on PKM2 expression in cancer cells, demonstrating the specificity of PA-12 for PKM2 protein. Taken together, our data suggest that PA-12 is a novel and potent PKM2 activator that has therapeutic implications for lung cancer.
Intoxication of murine macrophages (RAW 264.7) with the anthrax lethal toxin (LeTx 100 ng/ml) results in profound alterations in the host cell gene expression. The role of LeTx in mediating these effects is unknown, largely due to the difficulty in identifying and assigning function to individual proteins. In this study, we have used two-dimensional polyacrylamide gel electrophoresis to analyze the protein profile of murine macrophages treated with the LeTx, and have coupled this to protein identification using MALDI-TOF mass spectrometry. Interpretation of the peptide mass fingerprint data has relied primarily on the ProFound database. Among the differentially expressed spots, cleaved mitogen-activated protein kinase kinase (Mek1) and glucose-6-phosphate dehydrogenase were increased in the LeTx treated macrophages. Mek1 acts as a negative element in the signal transduction pathway, and G6PD plays the role for the protection of the cells from the hyper-production of active oxygen. Our results suggest that this proteomic approach is a useful tool to study protein expression in intoxicated macrophages and will contribute to the identification of a putative substrate for LeTx.
Objective: As one of the most important metabolic organs, the liver plays vital roles in modulating the lipid metabolism. This study was to compare miRNA expression profiles of the Large White liver between two different developmental periods and to identify candidate miRNAs for lipid metabolism. Methods: Eight liver samples were collected from White Large of 70-day fetus (P70) and of 70-day piglets (D70) (with 4 biological repeats at each development period) to construct sRNA libraries. Then the eight prepared sRNA libraries were sequenced using Illumina next-generation sequencing technology on HiSeq 2500 platform. Results: As a result, we obtained 346 known and 187 novel miRNAs. Compared with the D70, 55 down- and 61 up-regulated miRNAs were shown to be significantly differentially expressed (DE). Gene ontology and Kyoto encyclopedia of genes and genomes enrichment analysis indicated that these DE miRNAs were mainly involved in growth, development and diverse metabolic processes. They were predicted to regulate lipid metabolism through adipocytokine signaling pathway, mitogen-activated protein kinase, AMP-activated protein kinase, cyclic adenosine monophosphate, phosphatidylinositol 3 kinase/protein kinase B, and Notch signaling pathway. The four most abundantly expressed miRNAs were miR-122, miR-26a and miR-30a-5p (miR-122 only in P70), which play important roles in lipid metabolism. Integration analysis (details of mRNAs sequencing data were shown in another unpublished paper) revealed that many target genes of the DE miRNAs (miR-181b, miR-145-5p, miR-199a-5p, and miR-98) might be critical regulators in lipid metabolic process, including acyl-CoA synthetase long chain family member 4, ATP-binding casette A4, and stearyl-CoA desaturase. Thus, these miRNAs were the promising candidates for lipid metabolism. Conclusion: Our study provides the main differences in the Large White at miRNA level between two different developmental stages. It supplies a valuable database for the further function and mechanism elucidation of miRNAs in porcine liver development and lipid metabolism.
Ultraviolet rays are electromagnetic waves with a shorter wavelength than visible light, and ultraviolet rays that pass through the ozone layer are the main cause of skin aging. Chronic exposure of skin tissue to ultraviolet light activates the Mitogen-activated Protein Kinases (MAPKs) signaling pathways in human keratinocytes, resulting in increased production of matrix metalloproteinases (MMPs). In this study, we investigated the herbal extracts from Jeju Island on the anti-aging effect in human keratinocytes (HaCaTs) by ultraviolet stimulation. We examined that herb extract from Jeju Island were decreased in anti-aging activity on measuring the level of MMP-1 gene and protein expression in ultraviolet-induced keratinocytes. As a result, it was confirmed that Thymus quinquecostatus extract (TQE) significantly reduced the expression of MMP-1 in a dose-dependent manner by UV irradiated HaCaTs. According to our data, TQE significantly attenuated UV-induced phosphorylation of the MAPKs signaling elements ERK1/2, JNK1/2 and p38 proteins. These results suggest that the MAPKs pathway may contribute to the inhibitory effect of TQE on UV-induced MMP-1 production in human keratinocytes. Our results suggest that TQE may be a protective agent against skin aging by preventing UV-induced MMP-1 production.
Osteoporosis is a disease that increases the risk of fractures by inducing a decrease in bone strength by the changes in hormones and a decrease in minerals. Recent reports have indicated that the long-term administration of Adefovir dipivoxil (ADV), which is used as a treatment for the hepatitis virus and AIDS, may have osteoporotic side effects. On the other hand, there are few studies on the cytopathic correlation of these causes. In this study, the biological relevance of ADV was evaluated using osteoblast hFOB1.19 and vascular endothelial cell HUVEC. First, the cells were treated with ADV at different concentrations, and DAPI and crystal violet staining were performed for morphological analysis of each cell and nucleus. A CCK-8 assay, real-time PCR, alkaline phosphatase (ALP) staining, and activity was performed to evaluate the drug effects on cell proliferation, gene expression, and osteoblast differentiation. As a result, ADV induced cell hypertrophy in hFOB1.19 cells and HUVEC cells. Furthermore, ADV not only inhibited cell proliferation and TGF-${\beta}$ expression but was also involved in osteoblast differentiation. Overall, these results provide basic data to help better understand the mechanism of ADV-induced osteoporosis and its clinical implications.
Vaughn, Mathew A.;Lancaster, Phillip A.;Roden, Kelly C.;Sharman, Evin D.;Krehbiel, Clinton R.;Horn, Gerald W.;Starkey, Jessica D.
Journal of Animal Science and Technology
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v.61
no.5
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pp.260-271
/
2019
The objective of this study was to determine the effect of different stocker management programs on skeletal muscle development and growth characteristics, satellite cell (SC) activity in growing-finishing beef cattle as well as the effects of SC-conditioned media on preadipocyte gene expression and differentiation. Fall-weaned Angus steers (n = 76; $258{\pm}28kg$) were randomly assigned to 1 of 4 stocker production systems: 1) grazing dormant native range (NR) supplemented with a 40% CP cottonseed meal-based supplement ($1.02kg{\cdot}steer^{-1}{\cdot}d^{-1}$) followed by long-season summer grazing (CON, 0.46 kg/d); 2) grazing dormant NR supplemented with a ground corn and soybean meal-based supplement fed at 1% of BW followed by short-season summer grazing (CORN, 0.61 kg/d); 3) grazing winter wheat pasture (WP) at high stocking density (3.21 steers/ha) to achieve a moderate rate of gain (LGWP, 0.83 kg/d); and 4) grazing winter WP at low stocking density (0.99 steers/ha) to achieve a high rate of gain (HGWP, 1.29 kg/d). At the end of the stocker (intermediate harvest, IH) and finishing (final harvest, FH) phases, 4 steers / treatment were harvested and longissimus muscles (LM) sampled for cryohistological immunofluorescence analysis and SC culture assays. At IH, WP steers had greater LM fiber cross-sectional area than NR steers; however, at FH, the opposite was observed (p < 0.0001). At IH, CORN steers had the lowest Myf-5+:Pax7+ SC density (p = 0.020), while LGWP steers had the most Pax7+ SC (p = 0.043). At FH, CON steers had the highest LM capillary density (p = 0.003) and their cultured SC differentiated more readily than all other treatments (p = 0.017). At FH, Pax7 mRNA was more abundant in 14 d-old SC cultures from HGWP cattle (p = 0.03). Preadipocytes exposed to culture media from proliferating SC cultures from WP cattle isolated at FH had more $PPAR{\gamma}$ (p = 0.037) and less FABP4 (p = 0.030) mRNA expression compared with NR cattle. These data suggest that different stocker management strategies can impact skeletal muscle growth, SC function, and potentially impact marbling development in growing-finishing beef cattle.
Kim, Jisu;Beak, Suji;Ahn, Sanghyun;Moon, Byung Seok;Kim, Bom Sahn;Lee, Sang Ju;Oh, Seung Jun;Park, Hun-Young;Kwon, Seung Hae;Shin, Chul Ho;Lim, Kiwon;Lee, Kang Pa
Nutrition Research and Practice
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v.16
no.1
/
pp.33-45
/
2022
BACKGROUND/OBJECTIVES: Ginseng extract (GSE) and taurine (TR) are widely used antifatigue resources in functional foods. However, the mechanism underlying the antifatigue effects of GSE and TR are still unclear. Hence, we investigated whether GSE and TR have synergistic effects against fatigue in mice. MATERIALS/METHODS: L6 cells were treated with different concentrations of TR and GSE, and cell viability was determined using 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-(2,4-disulfophenyl)-2H-tetrazolium. Oxidative stress was analyzed by immunocytochemistry using MitoTrackerTM Red FM and an anti-8-oxoguanine antibody. Respiratory gas analysis was performed to investigate metabolism. Expression of an activated protein kinase was analyzed using immunohistochemistry. Gene expression of cluster of differentiation 36 and pyruvate dehydrogenase lipoamide kinase isozyme 4 was measured using reverse transcription-polymerase chain reaction. Mice were orally administered TR, GSE, or their combination for 30 days, and then fatigue-related parameters, including lactate, blood urea nitrogen, and glycogen, were measured after forced swimming. RESULTS: TR and GSE reduced oxidative stress levels in hydrogen peroxide-stimulated L6 cells and enhanced the oxygen uptake and lipid metabolism in mice after acute exercise. After oral administration of TR or GSE for 30 days, the fatigue-related parameters did not change in mice. However, the mice administered GSE (400 mg/kg/day) alone for 30 days could swim longer than those from the other groups. Further, no synergistic effect was observed after the swimming exercise in mice treated with the TR and GSE combination for 30 days. CONCLUSIONS: Taken together, our data suggest that TR and GSE may exert antifatigue effects in mice after acute exercise by enhancing oxygen uptake and lipid oxidation.
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