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Ma, Xing-Hua,Li, Hua-Yao,Kweon, Sang-Hyo,Jeong, Seong-Yong,Lee, Jong-Heun,Nahm, Sahn American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.5
<P>Three PbTiO<SUB>3</SUB> nanostructures were synthesized using a one-step hydrothermal reaction with different TiO<SUB>2</SUB> powders as Ti sources, and their gas-sensing properties were investigated. The sensor comprising PbTiO<SUB>3</SUB> nanoplates (NPs) exhibited a high response (resistance ratio = 80.4) to 5 ppm ethanol at 300 °C and could detect trace concentrations of ethanol down to 100 ppb. Moreover, the sensor showed high ethanol selectivity and nearly the same sensing characteristics despite the wide range of humidity variation from 20 to 80% RH. The mechanism for humidity-independent gas sensing was elucidated using diffuse reflectance infrared Fourier transform spectra. PbTiO<SUB>3</SUB> NPs are new and promising sensing materials that can be used for detecting ethanol in a highly sensitive and selective manner with negligible interference from ambient humidity.</P> [FIG OMISSION]</BR>
( Xiao Juan Xing ),( Yong Sheng Tian ),( Ri He Peng ),( Jing Xu ),( Wei Zhao ),( Quan Hong Yao ),( Sheng Sun ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.10
Although a large number of AroA enzymes (EPSPS: 5-enopyruvylshikimate-3-phosphate synthase) have been identified, cloned, and tested for glyphosate resistance, only two AroA variants, derived from Agrobacterium tumefaciens strain CP4 and Zea mays, have been utilized to produce the commercial glyphosate-resistant crops. Here, we have used a PCR-based twostep DNA synthesis method to synthesize an aroA gene (aroAA. metalliredigens) from Alkaliphilus metalliredigens, encoding a new EPSPS. Furthermore, transgenic Arabidopsis with the new aroAA. metalliredigens gene was obtained to confirm the potential of the novel aroA gene in developing glyphosate-resistant crops.
Meta-analysis of the Association Between GSTM1 and GSTT1 Gene Polymorphisms and Cervical Cancer
Zhang, Zhen-Yong,Jin, Xue-Ying,Wu, Rong,Wu, Li-Na,Xing, Rui,Yang, Shu-Juan,Xie, Yao Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.3
Aim: We conducted a meta-analysis to analyze the influence of GSTM1 and GSTT1 gene polymorphisms on cervical cancer risk, and explore gene-environment interactions. Methods: Identification of relevant studies was carried out through a search of Medline and the EMbase up to Oct. 2011. All case-control studies that investigated the association between GSTM1 and GSTT1 gene polymorphisms and risk of cervical cancer were included. The pooled odds ratio (OR) was used for analyses of results and the corresponding 95% confidence intervals (CI) were estimated. Results: A total of 21 case-control studies were included in the meta-analysis of GSTM1 (2,378 cases and 2,639 controls) and GSTT1 (1,229 cases and 1,223 controls) genotypes. The overall results showed that the GSTM1 null was related to an increased risk of cervical cancer (OR=1.50, 95% CI=1.21-1.85). Subgroup analysis were performed based on smoking and ethnicity. Our results showed that smokers with null GSTM1 genotype had a moderate increased risk of cervical cancer (OR=1.85, 95% CI=1.07-3.20). For the ethnicity stratification, moderate significantly increased risk of null GSTM1 genotype was found in Chinese (OR=2.12, 95% CI=1.43-3.15) and Indian populations (OR=2.07, 95% CI=1.49-2.88), but no increased risk was noted in others. Conclusion: This meta-analysis provided strong evidence that the GSTM1 genotype is associated with the development of cervical cancer, especially in smokers, and Chinese and Indian populations. However, no association was found for GSTT1 null genotype carriers.
Recent advances in cobalt-based Fischer-Tropsch synthesis catalysts
Yujun Suo,Yali Yao,Yusheng Zhang,Sijia Xing,Zhong-Yong Yuan 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
Fischer-Tropsch synthesis (FTS) is a promising technology for converting renewable energy sources tosynthetic liquid fuels, olefins or oxygenates. As one of the metal-based FTS catalysts with excellent intrinsicactivity, supported Co-based catalysts have attracted much attention. Their properties depend on theirgeometric morphology, surface composition and metal-support interaction (MSI). This paper reviews thelatest research progress of the supported Co-based catalysts for FTS, including recently-developed functionalmodification strategies to adjust the cobalt phase, crystallite size, metal dispersion, site density andmetal-support interaction to optimize the performance of cobalt-based catalysts. The effects of importantmaterials (including cobalt precursors, supports and promoters) on catalytic performance are discussedand compared. A summary is provided of the modifications made to catalysts with a unique and controllablestructure, in order to improve the catalytic activity and focus the product distribution on targetedwax, gasoline, diesel, olefins and oxygenate products. Guidance is provided regarding controlling thestructure and functions of Co-based catalysts. Opportunities and perspectives on future research intomodification strategies used for Co-based FTS catalyst are also noted.
Jiang, Hao,Liang, Shuang,Yao, Xue-Rui,Jin, Yong-Xun,Shen, Xing-Hui,Yuan, Bao,Zhang, Jia-Bao,Kim, Nam-Hyung Elsevier 2018 Theriogenology Vol.115 No.-
<P><B>Abstract</B></P> <P>Laminarin (LMA), a β-glucan mixture with good biocompatibility, improves the growth performance and immune response when used as food additives and nutraceuticals. The aim of the present research was to explore the effects of LMA on porcine early stage embryo development, as well as the underlying mechanisms. The results showed that the developmental competence of porcine early stage embryos was dramatically improved after LMA supplementation during the in vitro culture period. The presence of 20 μg/mL LMA during the in vitro culture period significantly improved cleavage rate, blastocyst formation rates, hatching rate, and total cell number in the blastocyst compared to that in the control group. Notably, LMA attenuated the intracellular reactive oxygen species generation induced by H<SUB>2</SUB>O<SUB>2</SUB>. Furthermore, LMA not only increased intracellular glutathione levels, but also ameliorated mitochondrial membrane potential. In addition, the expression of a zygotic genome activation related gene (<I>YAP1</I>), pluripotency-related genes (<I>OCT4</I>, <I>NANOG,</I> and <I>SOX2</I>), and hatching-related genes (<I>COX2</I>, <I>GATA4,</I> and <I>ITGA5</I>) were up-regulated following LMA supplementation during porcine early stage embryo development. These results demonstrate that LMA has beneficial effects on the development of porcine early stage embryos via regulation of oxidative stress. This evidence provides a novel method for embryo development improvement associated with exposure to LMA.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Laminarin has beneficial effects on the development of porcine early stage embryos. </LI> <LI> Laminarin attenuates intracellular reactive oxygen species generation. </LI> <LI> Laminarin increases intracellular glutathione levels and ameliorates ΔΨm. </LI> <LI> Laminarin up-regulates the expression of ZGA/pluripotency/hatching related genes. </LI> </UL> </P>
Xiong, Wei,Jiang, Yong-Xin,Ai, Yi-Qin,Liu, Shan,Wu, Xing-Rao,Cui, Jian-Guo,Qin, Ji-Yong,Liu, Yan,Xia, Yao-Xiong,Ju, Yun-He,He, Wen-Jie,Wang, Yong,Li, Yun-Fen,Hou, Yu,Wang, Li,Li, Wen-Hui Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.8
Background: Preoperative 5-fluorouracil (5-FU)-based chemoradiotherapy is a standard treatment for locally advanced colorectal cancer (CRC). However, CRC cells often develop chemoradiation resistance (CRR). Recent studies have shown that long non-coding RNA (lncRNA) plays critical roles in a myriad of biological processes and human diseases, as well as chemotherapy resistance. Since the roles of lncRNAs in 5-FU-based CRR in human CRC cells remain unknown, they were investigated in this study. Materials and Methods: A 5-FU-based concurrent CRR cell model was established using human CRC cell line HCT116. Microarray expression profiling of lncRNAs and mRNAs was undertaken in parental HCT116 and 5-FU-based CRR cell lines. Results: In total, 2,662 differentially expressed lncRNAs and 2,398 mRNAs were identified in 5-FU-based CRR HCT116 cells when compared with those in parental HCT116. Moreover, 6 lncRNAs and 6 mRNAs found to be differentially expressed were validated by quantitative real time PCR (qRT-PCR). Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis for the differentially expressed mRNAs indicated involvement of many, such as Jak-STAT, PI3K-Akt and NF-kappa B signaling pathways. To better understand the molecular basis of 5-FU-based CRR in CRC cells, correlated expression networks were constructed based on 8 intergenic lncRNAs and their nearby coding genes. Conclusions: Changes in lncRNA expression are involved in 5-FU-based CRR in CRC cells. These findings may provide novel insight for the prognosis and prediction of response to therapy in CRC patients.
Jia-Piao Lin,Chao-Qin Chen,Ling-Er Huang,Na-na Li,Yan Yang,Sheng-Mei Zhu,Yong-Xing Yao 한국뇌신경과학회 2018 Experimental Neurobiology Vol.27 No.4
α2-Adrenoceptor agonists attenuate hypersensitivity under neuropathic conditions. However, the mechanisms underlying this attenuation remain largely unknown. In the present study, we explored the potential roles of purinergic receptor 7 (P2X7R)/extracellular signal-regulated kinase (ERK) signaling in the anti-nociceptive effect of dexmedetomidine in a rat model of neuropathic pain induced by chronic constriction injury (CCI) of the sciatic nerve. An animal model of CCI was adopted to mimic the clinical neuropathic pain state. Behavioral hypersensitivity to mechanical and thermal stimuli was determined by von Frey filament and Hargreaves’ tests, and the spinal P2X7R expression level and ERK phosphorylation were analyzed using western blot analysis and immunohistochemistry. In parallel with the development of mechanical and thermal hyperalgesia, a significant increase in P2X7R expression was noted in the ipsilateral spinal cord on day 7 after CCI. Intrathecal administration of dexmedetomidine (2.5 μg) for 3 days not only attenuated neuropathic pain but also inhibited the CCI-induced P2X7R upregulation and ERK phosphorylation. Intrathecal dexmedetomidine administration did not produce obvious effects on locomotor function. The present study demonstrated that dexmedetomidine attenuates the neuropathic pain induced by CCI of the sciatic nerve in rats by inhibiting spinal P2X7R expression and ERK phosphorylation, indicating the potential therapeutic implications of dexmedetomidine administration for the treatment of neuropathic pain.