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Jin, Hyunjung,Do, Jihye,Moon, Dahyun,Noh, Eun Woon,Kim, Wook,Kwon, Mi Springer-Verlag [etc.] 2011 Planta Vol.234 No.5
<P>A cDNA library was constructed from secondary xylem in the stem of a 2-year-old yellow poplar after being bent for 6?h with a 45 configuration to isolate genes related to cell wall modification during the early stages of tension wood formation. A total of 6,141 ESTs were sequenced to generate a database of 5,982 high-quality expressed sequence tags (ESTs). These sequences were clustered into 1,733 unigenes, including 822 contigs and 911 singletons. Homologs of the genes regulate many aspects of secondary xylem development, including those for primary and secondary metabolism, plant growth hormones, transcription factors, cell wall biosynthesis and modification, and stress responses. Although there were only 1,733 annotated ESTs (28.9%), the annotated ESTs obtained in this study provided sequences for a broad array of transcripts expressed in the stem upon mechanical bending, and the majority of them were the first representatives of their respective gene families in Liriodendron tulipifera. In the case of lignin, xylem-specific COMTs were identified and their expressions were significantly downregulated in the tension wood-forming tissues. Additionally, the majority of the auxin- and BR-related genes were downregulated significantly in response to mechanical bending treatment. Despite the small number of ESTs sequenced in this study, many genes that are relevant to cell wall biosynthesis and modification have been isolated. Expression analysis of selected genes allow us to identify the regulatory genes that may perform essential functions during the early stages of tension wood formation and associated cell wall modification.</P>
Effect of Pesticide Residue in Muscle and Fat Tissue of Pigs Treated with Propiconazole
Jin Young Jeong,Byeonghyeon Kim,Sang Yun Ji,Youl Chang Baek,Minji Kim,Seol Hwa Park,Ki Hyun Kim,Sang-Ik Oh,Eunju Kim,Hyunjung Jung 한국축산식품학회 2021 한국축산식품학회지 Vol.41 No.6
This study estimated the effect of exposure to propiconazole through implementation and residues in finishing pigs. We analyzed the expression of fibrosisrelated genes and performed histological analysis of the blood, liver, kidney, muscle, ileum, and fat tissues. The animals were exposed for 28 d to different concentrations of propiconazole (0.09, 0.44, 0.88, 4.41, and 8.82 mg/kg bw/d). Quantitative, gene expression, and histological analyses in tissues were performed using liquid chromatography mass spectrometry, real-time PCR, and Masson’s trichrome staining, respectively. Final body weight did not differ among groups. However, genes involved in fibrosis were significantly differentially regulated in response to propiconazole concentrations. Glucose, alanine aminotransferase, and total bilirubin levels were significantly increased compared with those in the control group, while alkaline phosphatase level was decreased (p<0.05) after exposure to propiconazole. The residue limits of propiconazole were increased in the finishing phase at 4.41 and 8.82 mg/kg bw/d. The liver, kidney, and ileum showed blue staining after propiconazole treatment, confirmed by Masson s trichrome staining. In conclusion, these findings suggest that propiconazole exposure disturbs the expression of fibrosis-related genes. This study on dietary propiconazole in pigs can provide a basis for determining maximum residue limits and a better understanding of metabolism in pigs and meat products.
Artemisia scoparia decreases UV-induced production of MMP in human dermal fibroblasts
Hyunjung Lee,Jiho Yang,Hyun Jin Jo,Jung Hwan Oh,Fatih Karadeniz,Youngwan Seo,Chang-Suk Kong 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
Artemisia scoparia is a type of halophyte that inhabits much of Eurasia region, living near salt flats and seashores. It has been used as a traditional medicine ingredient for the treatment of inflammation, urethritis and bleeding. Recent studies showed that A. scoparia has physiological effects such as antioxidant, anti-inflammatory and anti-obesity activities. In this study, the effect of A. scoparia on photoaging in HDF cells was investigated by using its crude extract and solvent fractions (n-hexane, 85% aq. MeOH, n-BuOH and H₂O). Results suggested that the A. scoparia samples inhibited the photoaging markers which is the elevated expression of MMPs in UV-irradiated HDFs. Based on the results of this study, A. scoparia was suggested as a potential source for functional raw materials for the cosmetic industry. Furthermore, the studies that can verify the active ingredients of A. scoparia will contribute immensely to the research and development of cosmeceuticals from halophytes. Also, it will strengthen the competitiveness of the domestic cosmetics industry by promoting the utilization of undervalued coastal wetland plants.
Jin, Tae-Eun,Jang, Miae,Kim, Hyunjung,Choi, Yu Mi,Cho, Hana,Chung, Sungkwon,Park, Myoung Kyu Korean Society for Molecular Biology 2008 Molecules and cells Vol.26 No.3
<P>Corticotropin releasing factor (CRF) mediates various responses to stress through CRF receptors 1 and 2. CRF receptor 2 has two forms, 2alpha and 2beta each of which appears to have distinct roles. Here we used dopaminergic neuron-derived MN9D cells to investigate the function of CRF receptor 2 in dopamine neurons. We found that n-butyrate, a histone deacetylase inhibitor, induced MN9D cell differentiation and increased gene expression of all CRF receptors. CRF receptor 2beta was minimally expressed in MN9D cells; however, its expression dramatically increased during differentiation. CRF receptor 2beta expression levels appeared to correlate with neurite outgrowth, suggesting CRF receptor 2beta involvement in neuronal differentiation. To validate this statement, we made a CRF receptor 2beta-overexpressing MN9D/CRFR2 beta stable cell line. This cell line showed robust neurite outgrowth and GAP43 overexpression, together with MEK and ERK activation, suggesting MN9D cell neuronal differentiation. From these results, we conclude that CRF receptor 2beta plays an important role in MN9D cell differentiation by activating the MEK/ERK signaling pathway.</P>