China and Conflict Management : Moving toward a Co-Management Approach: China`s Policy toward North Korea and Taiwan

( Quan Sheng Zhao ) 경남대학교 극동문제연구소 2006 ASIAN PERSPECTIVE Vol.30 No.1

Special Issue: Peace and Security on the Korean Peninsula : China on the Korea Peace and Unification Process

( Quan Sheng Zhao ) 인하대학교 국제관계연구소 2002 Pacific Focus Vol.17 No.2

Aberrant microRNAs Expression in CD133+/CD326+ Human Lung Adenocarcinoma Initiating Cells from A549

Sheng Lin,Zheng-tang Chen,Jian-guo Sun,Jing-bo Wu,Hai-xia Long,Cong-hui Zhu,Tong Xiang,Hu Ma,Zhong-quan Zhao,Quan Yao,An-mei Zhang,Bo Zhu 한국분자세포생물학회 2012 Molecules and cells Vol.33 No.3

Increasing evidence demonstrates that miRNAs are in-volved in the dysregulation of tumor initiating cells (TICs) in various tumors. Due to a lack of definitive markers, cell sorting is not an ideal separation method for lung adeno-carcinoma initiating cells. In this study, we combined pa-clitaxel with serum-free medium cultivation (inverse-induc-tion) to enrich TICs from A549 cells, marked by CD133/ CD326, defined features of stemness. We next investigated aberrant microRNAs in this subpopulation compared to normal cells with miRNA microarray and found that 50 miRNAs exhibited a greater than 2-fold change in expres-sion. As further validation, 10 miRNAs were chosen to perform quantitative RT-PCR on the A549 cell line and primary samples. The results suggest that aberrant ex-pression of miRNAs such as miR-29ab, miR-183, miR-17-5p and miR-127-3P may play an important role in regulat-ing the bio-behavior of TICs.

Follow-Up of 58 Traumatic Carotid-Cavernous Fistulas after Endovascular Detachable-Balloon Embolization at a Single Center

Xiao-Quan Xu,Sheng Liu,Qing-Quan Zu,Lin-Bo Zhao,Jin-Guo Xia,Chun-Gao Zhou,Wei-Zhong Zhou,Hai-Bin Shi 대한신경과학회 2013 Journal of Clinical Neurology Vol.9 No.2

Background and Purpose This study evaluated the clinical value of detachable-balloon embolization for traumatic carotid-cavernous fistula (TCCF), focusing on the frequency, risk factors, and retreatment of recurrence. Methods Fifty-eight patients with TCCF underwent transarterial detachable-balloon embolization between October 2004 and March 2011. The clinical follow-up was performed every 3months until up to 3 years postprocedure. Each patient was placed in either the recurrence group or the nonrecurrence group according to whether a recurrence developed after the first procedure. The relevant factors including gender, fistula location, interval between trauma and the interventional procedure, blood flow in the carotid-cavernous fistula, number of balloons, and whether the internal carotid artery (ICA) was sacrificed were evaluated. Results All 58 TCCFs were successfully treated with transarterial balloon embolization, including 7 patients with ICA sacrifice. Recurrent fistulas occurred in seven patients during the follow-up period. Univariate analysis indicated that the interval between trauma and the interventional procedure (p=0.006) might be the main factor related to the recurrence of TCCF. The second treatments involved ICA sacrifice in two patients, fistula embolization with balloons in four patients, and placement of a covered stent in one patient. Conclusions Detachable balloons can still serve as the first-line treatment for TCCFs and recurrent TCCFs despite having a nonnegligible recurrence rate. Shortening the interval between trauma and the interventional procedure may reduce the risk of recurrence.

Correlation between Intravoxel Incoherent Motion Magnetic Resonance Imaging Derived Metrics and Serum Soluble CD40 Ligand Level in an Embolic Canine Stroke Model

Xiao-Quan Xu,Chen-Jiang Wu,Shan-Shan Lu,Qian-Qian Gao,Qing-Quan Zu,Xing-Long Liu,Hai-Bin Shi,Sheng Liu 대한영상의학회 2017 Korean Journal of Radiology Vol.18 No.5

Objective: To determine the relationship between intravoxel incoherent motion (IVIM) imaging derived quantitative metrics and serum soluble CD40 ligand (sCD40L) level in an embolic canine stroke model. Materials and Methods: A middle cerebral artery occlusion model was established in 24 beagle dogs. Experimental dogs were divided into low- and high-sCD40L group according to serum sCD40L level at 4.5 hours after establishing the model. IVIM imaging was scanned at 4.5 hours after model establishment using 10 b values ranging from 0 to 900 s/mm2. Quantitative metrics diffusion coefficient (D), pseudodiffusion coefficient (D*), and perfusion fraction (f) of ischemic lesions were calculated. Quantitative metrics of ischemic lesions were normalized by contralateral hemisphere using the following formula: normalized D = Dstroke / Dcontralateral. Differences in IVIM metrics between the low- and high-sCD40L groups were compared using t test. Pearson’s correlation analyses were performed to determine the relationship between IVIM metrics and serum sCD40L level. Results: The high-sCD40L group showed significantly lower f and normalized f values than the low-sCD40L group (f, p < 0.001; normalized f, p < 0.001). There was no significant difference in D*, normalized D*, D, or normalized D value between the two groups (All p > 0.05). Both f and normalized f values were negatively correlated with serum sCD40L level (f, r = -0.789, p < 0.001; normalized f, r = -0.823, p < 0.001). However, serum sCD40L level had no significant correlation with D*, normalized D*, D, or normalized D (All p > 0.05). Conclusion: The f value derived from IVIM imaging was negatively correlated with serum sCD40L level. f value might serve as a potential imaging biomarker to assess the formation of microvascular thrombosis in hyperacute period of ischemic stroke.

Magnetization Produced by Spin-polarized Xenon-129 Gas Detected by Using All-optical Atomic Magnetometer

Sheng Zou,Hong Zhang,Xi-yuan Chen,Wei Quan 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.6

The method to produce spin-polarized xenon-129 gas was based on the method of spin-exchangeoptical pumping (SEOP). The magnetizations produced by the hyperpolarized (HP) xenon-129gas were analyzed from the perspective of theoretical and experimental research. The theoreticalsimulation was based on the conventional Bloch equation. The experimental research was based onmeasurements made by using an all-optical atomic magnetometer. The experimental results agreedwith the theoretical simulated results, which proved that an all-optical atomic magnetometer hadthe ability to measure the magnetic field produced by xenon-129 nuclei in a low external magneticfield. Because the frequency of the nuclear spin precession could be detected precisely, the resultsshowed that the mean measurement error of the gyromagnetic ratio was 1.1 × 10−4 Hz/nT.

Water-soluble coenzyme Q₁₀ provides better protection than lipid-soluble coenzyme Q₁₀ in a rat model of chronic tacrolimus nephropathy

( Sheng Cui ),( Kang Luo ),( Yi Quan ),( Sun Woo Lim ),( Yoo Jin Shin ),( Kyung Eun Lee ),( Hong Lim Kim ),( Eun Jeong Ko ),( Ju Hwan Kim ),( Sang J. Chung ),( Soo Kyung Bae ),( Byung Ha Chung ),( Chu 대한내과학회 2021 The Korean Journal of Internal Medicine Vol.36 No.4

Background/Aims: Coenzyme Q₁₀ (CoQ₁₀), is a promising antioxidant; however, low bioavailability owing to lipid-solubility is a limiting factor. We developed water-soluble CoQ₁₀ (CoQ₁₀-W) and compared its effects with conventional lipid-soluble CoQ₁₀ (CoQ₁₀-L) in an experimental model of chronic tacrolimus (Tac) nephropathy. Methods: CoQ₁₀-W was developed from a glycyrrhizic-carnitine mixed layer CoQ₁₀ micelle based on acyltransferases. Chronic nephropathy was induced in rats with 28-day Tac treatment; they were concomitantly treated with CoQ₁₀-L or CoQ₁₀-W. CoQ₁₀ level in plasma and kidney were measured using liquid chromatography-mass spectrometry. CoQ₁₀-W and CoQ₁₀-L effects on Tac-induced nephropathy were assessed in terms of renal function, histopathology, oxidative stress, and apoptotic cell death. Their effects on cell viability and reactive oxygen species (ROS) production were assessed in cultured proximal tubular cells, human kidney 2 (HK-2) cells. Results: The plasma CoQ₁₀ level was significantly higher in the CoQ₁₀-W group than in the CoQ₁₀-L group. Tac treatment caused renal dysfunction, typical pathologic lesions, and oxidative stress markers. Serum creatinine was restored in the Tac + CoQ₁₀-L or CoQ₁₀-W groups compared with that in the Tac group. CoQ₁₀-W administration reduced oxidative stress and apoptosis markers. Mitochondrial ultrastructure assessment revealed that the addition of CoQ₁₀-L or CoQ₁₀-W with Tac increased mitochondrial size and number than Tac treatment alone. In vitro investigations revealed that both CoQ₁₀-L and CoQ₁₀-W improved cell viability and reduced ROS production in the Tac-induced HK-2 cell injury. Conclusions: CoQ₁₀-W has a better therapeutic effect in Tac-induced renal injury than conventional CoQ₁₀-L, possibly associated with improved CoQ₁₀ bioavailability.

Synthesis and Cytotoxicity of Novel 3-Amino-4-indolylmaleimide Derivatives

Sheng-Yin Zhao,Yan-Wu Yang,Hai-Quan Zhang,Yun Yue,Mei Fan 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.4

In an attempt to develop potent and selective antitumor agents, a series of novel 3-amino-4-indolylmaleimides were designed and synthesized. The reaction showed high regioselectivity. The structure of compound 7a was determined by an X-ray single crystal diffraction method. The cytotoxicities of the title compounds were evaluated against HeLa, SMMC 7721 and HL 60 cancer cell lines by a standard MTT assay in vitro. The pharmacological results showed that some of the title compounds displayed moderate or high cytotoxic activity against the tested cell lines. Compound 7d was the most promising compound against the tested cancer cell lines. Structure-activity relationships are discussed based on the experimental data obtained. A hydroxyethylamino group at the 3-position in the side chain of indolylmaleimide is associated with an increase in cytotoxicity.

Determination of Thermal Equilibrium in a Sealed Cell Based on Optical Depth

Sheng Zou,Hong Zhang,Xi-Yuan Chen,Guang-cun Shan,Wei Quan 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.70 No.2

An effective method based on optical depth (OD) is presented to measure thermal equilibrium in a cell. First, the principle of determining the temperature distribution in the cell by using the OD is demonstrated. Subsequently, relevant experiments are carried out. Original experimental results showed that some gradients of OD distributions in the cell at different wavelengths and variations of the OD increased slowly along the direction of motion of the beam at a fixed wavelength. At a wavelength of 766.6839 nm, which is about 7 GHz blue shifted with respect to the potassium resonance, the average value of the OD was about 0.764 and the maximal and the minimum inhomogeneity biases among all location points were about 6.07% and 0.56%, respectively. As for the corresponding wavelengths of 766.67785 nm and 766.73004 nm, some deviations from previous results, which were caused by different absorptions of the alkali-metal atoms at different frequencies of the laser beam, were observed. The nonuniform OD values along the direction of motion of the beam reflected an inhomogeneous distribution of the temperature in the cell, which may have been caused by layout of the oven. When the layout of the oven was modified, comparative experiments comparable to these with the previous layout of the oven demonstrated that the uniformity of the temperature distribution in the cell was improved and that thermal equilibrium time was shorter by about 10 minutes. This method played an important role in determining the thermal equilibrium time in the cell.

FGD5-AS1 promotes growth and mobility of trophoblast cells by regulating IGF2 via sponging miR-16-5p in pre-eclampsia

Quan Limei,Jin Yan,Wang Jianfang,Dai Xiwang,Zhu Shuli,Sheng Zengwei 대한독성 유전단백체 학회 2024 Molecular & cellular toxicology Vol.20 No.2

Background PE is a common pregnancy disease that can cause various pathologies in pregnant women. GEO microarray data revealed low expression of FGD5-AS1 in placenta tissues from patients with severe PE. As predicted by ENCORI, FGD5-AS1 sponges miR-16-5p, and IGF2, and promotes cell proliferation, differentiation, and metabolism. Objectives This study aimed to interrogate the interaction of FGD5-AS1/miR-16-5p/IGF2 axis and the mechanism of FGD5-AS1 in hypoxia-induced trophoblast cell injury. Results Our findings revealed that FGD5-AS1 and IGF2 were substantially decreased in PE patients than that in normal pregnant females, whereas miR-16-5p was increased in PE patients than that in normal pregnant females. In vitro studies showed that FGD5-AS1 were reduced in trophoblast cells after hypoxia treatment, accompanied by decreased viability and increased apoptosis, also reduced invasion, migration and angiogenesis. However, FGD5-AS1 overexpression substantially reversed these effects. Further mechanistic analysis showed that FGD5-AS1 could target miR-16-5p to regulate IGF2. FGD5-AS1 promoted the expression of IGF2 by sponging miR-16-5p, thereby increasing the viability of trophoblast cells after hypoxia treatment and promoting invasion and migration. Conclusion Overall, our findings demonstrated that FGD5-AS1 promoted growth and mobility of trophoblast cells by regulating miR-16-5p/IGF2 axis in PE.