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Hua-Xing Huang,Liang-Lan Shen,Hai-Yan Huang,Li-Hua Zhao,Feng Xu,Dong-Mei Zhang,Xiu-Lin Zhang,Tong Chen,Xue-Qin Wang,Yan Xie,Jian-Bin Su 대한당뇨병학회 2021 Diabetes and Metabolism Journal Vol.45 No.6
Background: Type 2 diabetes mellitus (T2DM) is characterized by elevated fasting glucagon and impaired suppression of postprandial glucagon secretion, which may participate in diabetic complications. Therefore, we investigated the associations of plasma glucagon with estimated glomerular filtration rate (eGFR), albuminuria and diabetic kidney disease (DKD) in T2DM patients.Methods: Fasting glucagon and postchallenge glucagon (assessed by area under the glucagon curve [AUCgla]) levels were determined during oral glucose tolerance tests. Patients with an eGFR <60 mL/min/1.73 m2 and/or a urinary albumin-to-creatinine ratio (UACR) ≥30 mg/g who presented with diabetic retinopathy were identified as having DKD.Results: Of the 2,436 recruited patients, fasting glucagon was correlated with eGFR and UACR (r=–0.112 and r=0.157, respectively; P<0.001), and AUCgla was also correlated with eGFR and UACR (r=–0.267 and r=0.234, respectively; P<0.001). Moreover, 31.7% (n=771) presented with DKD; the prevalence of DKD was 27.3%, 27.6%, 32.5%, and 39.2% in the first (Q1), second (Q2), third (Q3), and fourth quartile (Q4) of fasting glucagon, respectively; and the corresponding prevalence for AUCgla was 25.9%, 22.7%, 33.7%, and 44.4%, respectively. Furthermore, after adjusting for other clinical covariates, the adjusted odds ratios (ORs; 95% confidence intervals) for DKD in Q2, Q3, and Q4 versus Q1 of fasting glucagon were 0.946 (0.697 to 1.284), 1.209 (0.895 to 1.634), and 1.521 (1.129 to 2.049), respectively; the corresponding ORs of AUCgla were 0.825 (0.611 to 1.114), 1.323 (0.989 to 1.769), and 2.066 (1.546 to 2.760), respectively. Additionally, when we restricted our analysis in patients with glycosylated hemoglobin <7.0% (n=471), we found fasting glucagon and AUCgla were still independently associated with DKD.Conclusion: Both increased fasting and postchallenge glucagon levels were independently associated with DKD in T2DM patients.
Xie, Li-hua,Quan, Xin,Zhang, Jie,Yang, Yan-yan,Sun, Run-hong,Xia, Ming-cong,Xue, Bao-guo,Wu, Chao,Han, Xiao-yun,Xue, Ya-nan,Yang, Li-rong The Korean Society of Plant Pathology 2019 Plant Pathology Journal Vol.35 No.1
Gaeumannomyces graminis var. tritici is a soil borne pathogenic fungus associated with wheat roots. The accurate quantification of gene expression during the process of infection might be helpful to understand the pathogenic molecular mechanism. However, this method requires suitable reference genes for transcript normalization. In this study, nine candidate reference genes were chosen, and the specificity of the primers were investigated by melting curves of PCR products. The expression stability of these nine candidates was determined with three programs-geNorm, Norm Finder, and Best Keeper. $TUB{\beta}$ was identified as the most stable reference gene. Furthermore, the exopolygalacturonase gene (ExoPG) was selected to verify the reliability of $TUB{\beta}$ expression. The expression profile of ExoPG assessed using $TUB{\beta}$ agreed with the results of digital gene expression analysis by RNA-Seq. This study is the first systematic exploration of the optimal reference genes in the infection process of Gaeumannomyces graminis var. tritici.
A Density Functional Study of Furofuran Polymers as Potential Materials for Polymer Solar Cells
Xie, Xiao-Hua,Shen, Wei,He, Rong-Xing,Li, Ming Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.10
The structural, electronic, and optical properties of poly(3-hexylthiophene) (P3HT) have been comprehensively studied by density functional theory (DFT) to rationalize the experimentally observed properties. Rather, we employed periodic boundary conditions (PBC) method to simulate the polymer block, and calculated effective charge mass from the band structure calculation for describing charge transport properties. The simulated results of P3HT are consistent with the experimental results in band gaps, absorption spectra, and effective charge mass. Based on the same calculated methods as P3HT, a series of polymers have been designed on the basis of the two types of building blocks, furofurans and furofurans substituted with cyano (CN) groups, to investigate suitable polymers toward polymer solar cell (PSC) materials. The calculated results reveal that the polymers substituted with CN groups have good structural stability, low-lying FMO energy levels, wide absorption spectra, and smaller effective masses, which are due to their good rigidity and conjugation in comparison with P3HT. Besides, the insertion of CN groups improves the performance of PSC. Synthetically, the designed polymers PFF1 and PFF2 are the champion candidates toward PSC relative to P3HT.
A Density Functional Study of Furofuran Polymers as Potential Materials for Polymer Solar Cells
Xiao-Hua Xie,Wei Shen,Rong-Xing He,Ming Li 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.10
The structural, electronic, and optical properties of poly(3-hexylthiophene) (P3HT) have been comprehensively studied by density functional theory (DFT) to rationalize the experimentally observed properties. Rather, we employed periodic boundary conditions (PBC) method to simulate the polymer block, and calculated effective charge mass from the band structure calculation for describing charge transport properties. The simulated results of P3HT are consistent with the experimental results in band gaps, absorption spectra, and effective charge mass. Based on the same calculated methods as P3HT, a series of polymers have been designed on the basis of the two types of building blocks, furofurans and furofurans substituted with cyano (CN) groups, to investigate suitable polymers toward polymer solar cell (PSC) materials. The calculated results reveal that the polymers substituted with CN groups have good structural stability, low-lying FMO energy levels, wide absorption spectra, and smaller effective masses, which are due to their good rigidity and conjugation in comparison with P3HT. Besides, the insertion of CN groups improves the performance of PSC. Synthetically, the designed polymers PFF1 and PFF2 are the champion candidates toward PSC relative to P3HT.
Yu‑hua Xie,Jiao Hu 한국유전학회 2020 Genes & Genomics Vol.42 No.11
Background Glioma has the chief type of primary brain tumors worldwide. The glioma may be controlled by regulatorsincluding some lncRNAs, miRNAs, and proteins. Objective Our study aims to discover the underlying mechanism for lncPCAT19/miR-142-5p/MELK axis in gliomaprogression. Methods The clinical samples were from patients with gliomas in our Hospital. Hematoxylin–eosin staining (H&E) wasapplied to determine the clinical pathological changes. Real time PCR was performed to measure the levels of lncPCAT19,miR-142-5p, MELK, and expression of other genes. Western blot was conducted to detect the protein level of MELK. RIPassay was performed to analyze the interaction between lncPCAT19 and miR-142-5p, and dual-luciferase reporter assay wasused to determine the binding site between lncPCAT19 and miR-142-5p. CCK-8, colony formation assay, flow cytometry,and trans-well assay were carried out to confirm cell proliferation, colony formation, apoptosis, and invasion, respectively. Results LncPCAT19 was increased in cancer tissues. Then, lncPCAT19 could interact with and down-regulate miR-142-5p. Knockdown of lncPCAT19 distinctly inhibited tumor growth in vivo. Interfering lncPCAT19/overexpression of miR-142-5pdecreased glioma cell proliferation, colony formation and invasion, and promoted cell apoptosis by down-regulating expressionof Cyclin B1, CDK2, N-cadherin, Bcl-2, and by up-regulating expression of Bax and E-cadherin. Moreover, overexpressionof lncPCAT19 overturned tumor-suppressing role of miR-142-5p in cells. Additionally, lncPCAT19 and miR-142-5psynergistically regulated expression of MELK. In conclusion, lncPCAT19 enhanced glioma development via increasingMELK by performing as a sponge of miR-142-5p. Conclusions LncPCAT19 promotes glioma progression by sponging miR-142-5p to upregulate MELK levels. Thus, lncPCAT19/miR-142-5p/MELK signaling would be a potential target for glioma treatment.