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( Qiu Chun Li ),( Ya Chen Hu ),( Yin Fei Wu ),( Xiao Chun Wang ),( Xiao Lei Xie ),( Ming Xin Tao ),( Jun Lei Yin ),( Zhi Jie Lin ),( Yang Jiao ),( Li Juan Xu ),( Xinan Jiao ) 한국미생물 · 생명공학회 2015 Journal of microbiology and biotechnology Vol.25 No.5
As Salmonella enterica serovar Pullorum remains a major economic problem for the poultry industries of countries with no efficient control measures, we presented a multidrug resistance strain S06004 (isolated from a clinically sick chicken in China in 2006) for genome sequencing. The genome comparison showed that the strain contained two prophages, the ST104 and prophage-4 (Fels2) of E. coli LF82, which were not detected in the only published genomes of S. Pullorum RKS5078 and CDC1983-67. In addition, the GyrA Ser83 point mutation, drugresistant genes, and many antibiotic pump systems that are present in S06004 may be contributing to the multidrug resistance of this strain.
Inhibitory Effects of $(1R,9S)-{\beta}-Hydrastine$ on Calcium Transport in PC12 Cells
Yin, Shou Yu,Jin, Chun-Mei,Yang, Yoo-Jung,Lim, Sung-Cil,Lee, Chong-Kil,Hwang, Bang-Yeon,Ro, Jai-Seup,Lee, Myung-Koo 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.1
[ $(1R,9S)-{\beta} ]-Hydrastine$ (BHS), at $100{\mu}M$, has been shown to mainly reduce the $K^+-induced$ dopamine release and $Ca^{2+}$ influx by blocking the L-type $Ca^{2+}$ channel and inhibit the caffeine activated store-operated $Ca^{2+}$ channels, but not those activated by thapsigargin, in PC12 cells. In this study, the effects of BHS on $Ca^{2+}$ transport from $Ca^{2+}$ stores in the absence of external $Ca^{2+}$ were investigated in PC12 cells. BHS decreased the basal intracellular $Ca^{2+}$ concentration $([Ca^{2+}]_i)$ in the absence of external $Ca^{2+}$ in PC12 cells. In the absence of external $Ca^{2+}$, pre-treating PC12 cells with $100{\mu}M$ BHS reduced the rapid increase in the $[Ca^{2+}]_i$ elicited by 20mM caffeine, but not that by $1{\mu}M$ thapsigargin. In addition, BHS inhibited the increase in the $[Ca^{2+}]_i$ elicited by restoration of 2mM $CaCl_2$ after the $Ca^{2+}$ stores had been depleted by 20mM caffeine, but not those depleted by $1{\mu}M$ thapsigargin, in the absence of external $Ca^{2+}$. These results suggested that BHS mainly inhibited $Ca^{2+}$ leakage from the $Ca^{2+}$ stores and the caffeine-stimulated release of $Ca^{2+}$ from the caffeine-sensitive $Ca^{2+}$ stores in PC12 cells.
RBM24 exacerbates bladder cancer progression by forming a Runx1t1/TCF4/miR-625-5p feedback loop
Yin Yue-Wei,Liu Kai-Long,Lu Bao-Sai,Li Wei,Niu Ya-Lin,Zhao Chen-Ming,Yang Zhan,Guo Ping-Ying,Qi Jin-Chun 생화학분자생물학회 2021 Experimental and molecular medicine Vol.53 No.-
RNA–binding motif protein 24 (RBM24) acts as a multifunctional determinant of cell fate, proliferation, apoptosis, and differentiation during development by regulating premRNA splicing and mRNA stability. It is also implicated in carcinogenesis, but the functions of RBM24 in bladder cancer (BC) remain unclear. In the present study, we revealed that RBM24 was upregulated in BC tissues. Importantly, we found that a higher level of RBM24 was correlated with poor prognosis in BC patients. Overexpression of RBM24 promoted BC cell proliferation, while depletion of RBM24 inhibited BC cell proliferation in vivo and in vitro. Mechanistically, RBM24 positively regulated Runx1t1 expression in BC cells by binding to and enhancing Runx1t1 mRNA stability. Furthermore, Runx1t1 in turn promoted RBM24 expression by interacting with the transcription factor TCF4 and suppressing the transcription of miR-625-5p, which directly targets RBM24 and suppresses RBM24 expression. RBM24-regulated BC cell proliferation was moderated via the Runx1t1/TCF4/miR-625-5p feedback loop. These results indicate that the RBM24/Runx1t1/TCF4/miR-625-5p positive feedback loop participates in BC progression. Disruption of this pathway may be a potential therapeutic strategy for BC treatment.
Two New Diphenylethylenes from Arundina graminifolia and Their Cytotoxicity
Yin-Ke Li,Bin Zhou,Yan-Qing Ye,Gang Du,De-Yun Niu,Chun-Yang Meng,Xue-Mei Gao,Qiu-Fen Hu 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.11
Two new diphenylethylenes, gramniphenols H and I (1 and 2), together with six known diphenylethylenes (3- 8), were isolated from Arundina graminifolia. The structures of 1-8 were elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. Compounds 1 and 2 were evaluated for their cytotoxicity against five human tumor cell lines. Compound 1 showed cytotoxicity against PC3 cells with IC50 value of 3.5 μM. Compound 2 showed cytotoxicity against NB4 and PC3 cells with IC50 values of 3.6 and 3.8 μM, respectively.
Yang Fei,Shi Yu Jia,Lin Lin,Chen Jing Yao,Hou Meng Zhe,Yu Ke Xin,Zhang Yi Han,Yuan Zheng,Li Xiao Fang,Hu Yan Chun,Shang Jun,Yin Shao Qian,Wang Xian Wei 한국물리학회 2023 Current Applied Physics Vol.50 No.-
In this work, to prepare the PbZr0.52Ti0.48O3(PZT)/PbZrO3(PZ) multilayer films, PZ films and PZT films were spin-coated on LaNiO3/SiO2/Si substrates in sequence by the sol-gel method, and the PZ films were prepared using PZ precursor solution with different concentrations. After each spin-coating, PZ layer and PZT layer were annealed with rapid thermal annealing (RTA) technique at 650 ◦C and 550 ◦C, respectively. The crystal structures, microstructures and electrical properties of the films with different PZ film thickness were comprehensively investigated. The PZ films with different thickness showed perovskite phase. The PZT films on crystallized PZ films exhibited the coexistence of pyrochlore phase and perovskite phase at the annealing temperature of 550 ◦C. The PZT/PZ multilayer films with 0.2 M PZ precursor solution exhibit typical anti-ferroelectricity with double hysteresis loops, while other multilayer films exhibit nearly linear loops. In addition, the recoverable energy storage density increases with the increase of the film thickness and reaches the maximum value 32.4 J/ cm3 in the PZT/PZ multilayer films with 0.4 M PZ precursor solution. Therefore, the ferroelectric properties of the PZT/PZ multilayer films could be regulated by different PZ film thickness, which effectively further enhances the energy storage performance.
Two New Diphenylethylenes from Arundina graminifolia and Their Cytotoxicity
Li, Yin-Ke,Zhou, Bin,Ye, Yan-Qing,Du, Gang,Niu, De-Yun,Meng, Chun-Yang,Gao, Xue-Mei,Hu, Qiu-Fen Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.11
Two new diphenylethylenes, gramniphenols H and I (1 and 2), together with six known diphenylethylenes (3-8), were isolated from Arundina graminifolia. The structures of 1-8 were elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. Compounds 1 and 2 were evaluated for their cytotoxicity against five human tumor cell lines. Compound 1 showed cytotoxicity against PC3 cells with $IC_{50}$ value of 3.5 ${\mu}M$. Compound 2 showed cytotoxicity against NB4 and PC3 cells with $IC_{50}$ values of 3.6 and 3.8 ${\mu}M$, respectively.
Flavones from the Bark of Lindera caudata and Their Anti-Tobacco Mosaic Virus Activity
Yu-Chun Yang,Ying Qin,Xian-Xue Wu,Cong-Fang Xia,Yan-Lin Meng,Bin Zhou,Yan-Qing Ye,Xue-Mei Gao,Yin-Ke Li,Qiu-Fen Hu 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.4
Two new flavones, 5-hydroxy-8-hydroxymethyl-7,4′-dimethoxy-flavone (1) and 6-hydroxy-8-hydroxymethyl-7,4′-dimethoxy-flavone (2), together with six known flavones (3–8), were isolated from the bark of Lindera caudata. The structures of 1–8 were elucidated by spectroscopic methods including extensive 1D and 2D NMR techniques. Compounds 1–8 were evaluated for their anti-tobacco mosaic virus (anti-TMV) activity. The results showed that Compounds 1 and 2 showed high anti-TMV activity with inhibition rates of 31.2 and 28.8%, respectively. These values are close to those of positive control.
Inhibitory Effects of (1R,9S)-β-Hydrastine on Calcium Transport in PC12 Cells
Shou Yu Yin,Chun Mei Jin,Yoo Jung Yang,Sung Cil Lim,이종길,황방연,Jai Seup Ro,이명구 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.1
(1R,9S)-β-Hydrastine (BHS), at 100 μM, has been shown to mainly reduce the K+-induced dopamine release and Ca2+ influx by blocking the L-type Ca2+ channel and inhibit the caffeine activated store-operated Ca2+ channels, but not those activated by thapsigargin, in PC12 cells. In this study, the effects of BHS on Ca2+ transport from Ca2+ stores in the absence of external Ca2+ were investigated in PC12 cells. BHS decreased the basal intracellular Ca2+ concentration ([Ca2+]i) in the absence of external Ca2+ in PC12 cells. In the absence of external Ca2+, pretreating PC12 cells with 100 μM BHS reduced the rapid increase in the [Ca2+]i elicited by 20 mM caffeine, but not that by 1 μM thapsigargin. In addition, BHS inhibited the increase in the [Ca2+]i elicited by restoration of 2 mM CaCl2 after the Ca2+ stores had been depleted by 20 mM caffeine, but not those depleted by 1 μM thapsigargin, in the absence of external Ca2+. These results suggested that BHS mainly inhibited Ca2+ leakage from the Ca2+ stores and the caffeine- stimulated release of Ca2+ from the caffeine-sensitive Ca2+ stores in PC12 cells.
Effects of (1R,9S)-β-Hydrastine Hydrochloride on L-DOPA-Induced Cytotoxicity in PC12 Cells
Shou Yu Yin,Jae Joon Lee,Yu Mi Kim,Chun Mei Jin,Yoo Jung Yang,Myung Koo Lee 한국생약학회 2004 Natural Product Sciences Vol.10 No.3
Previously, (1R,9S)-b-hydrastine hydrochloride has been found to lower dopamine content in PC12 cells (Kim et al., 20001). In this study, the effects of (1R,9S)-b-hydrastine hydrochloride on L-DOPA-induced cytotoxicity in PC12 cells were investigated. Treatment with (1R,9S)-b-hydrastine hydrochloride at concentrations higher than 500 mM caused cytotoxicity in PC12 cells. In addition, (1R,9S)-b-hydrastine hydrochloride at non-cytotoxic or cytotoxic concentrations significantly enhanced L-DOPA-induced cytotoxicity (L-DOPA concentration, 50 μM). Treatment of PC12 cells with 750 μM 1R,9S)-b-hydrastine hydrochloride and 50 μM L-DOPA, alone or in combination, also induced cell death via a mechanism which exhibited morphological and biochemical characteristics of apoptosis, including chromatin condensation and membrane blebbing. Exposure of PC12 cells to (1R,9S)-b- hydrastine hydrochloride, L-DOPA and (1R,9S)-b-hydrastine hydrochloride plus L-DOPA for 48 h resulted in a marked increase in the cell loss and percentage of apoptotic cells compared with exposure for 24 h. These data indicate that (1R,9S)-b-hydrastine hydrochloride at higher concentration ranges aggravates L-DOPA-induced neurotoxicity cytotoxicity in PC12 cells. Therefore, it is proposed that the long-term L-DOPA therapeutic patients with (1R,9S)-b-hydrastine hydrochloride could be checked for the adverse symptoms.
Shou Yu Yin,Jae Joon Lee,Yu Mi Kim,Chun Mei Jin,Yoo Jung Yang,Min Hee Kang,Myung Koo Lee 한국생약학회 2004 Natural Product Sciences Vol.10 No.3
The effects of BHSH on L-DOPA-induced increase in dopamine content in PC12 cells were investigated. L-DOPA treatment at 20 or 50 mM increased dopamine content after both 24 and 48 h of incubation in PC12 cells. However, the co-treatments of BHSH (10-50 mM) with L-DOPA (20 or 50 mM) significantly inhibited the increase of dopamine content induced by L-DOPA. BHSH treatment at 10-50 mM significantly inhibited basal aromatic L-amino acid decarboxylase (AADC) activity in a concentration-dependent manner at 15 min, and then AADC activity was rapidly recovered to the control level at about 2 h. These results indicate that the inhibition of AADC activity by BHSH was, in part, contributed to the early-stage decrease of dopamine content induced by LDOPA in PC12 cells. Taken together, it is proposed that the short-term inhibition of dopamine biosynthesis by BHSH was mediated by the regulation of tyrosine hydroxylace (TH).