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Caspase-3 inhibitor inhibits enterovirus D68 production
Wenbo Huo,Jinghua Yu,Chunyu Liu,Ting Wu,Yue Wang,Xiangling Meng,Fengmei Song,Shuxia Zhang,Ying Su,Yumeng Liu,Jinming Liu,Xiaoyan Yu,Shucheng Hua 한국미생물학회 2020 The journal of microbiology Vol.58 No.9
Enterovirus D68 (EVD68) is an emerging pathogen that recently caused a large worldwide outbreak of severe respiratory disease in children. However, the relationship between EVD68 and host cells remains unclear. Caspases are involved in cell death, immune response, and even viral production. We found that caspase-3 was activated during EVD68 replication to induce apoptosis. Caspase-3 inhibitor (Z-DEVDFMK) inhibited viral production, protected host cells from the cytopathic effects of EVD68 infection, and prevented EVD68 from regulating the host cell cycle at G0/G1. Meanwhile, caspase-3 activator (PAC-1) increased EVD68 production. EVD68 infection therefore activates caspase-3 for virus production. This knowledge provides a potential direction for the prevention and treatment of disease related to EVD68.
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Chuanmin Chen,Wenbo Jia,Songtao Liu,Yue Cao,Bing Zhao,Jianqiao Wang 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.3
CuCl2-SCR catalysts prepared by an improved impregnation method were studied to evaluate the catalytic performance for gaseous elemental mercury (Hg0) oxidation in simulated flue gas. Hg0 oxidation activity of commercial SCR catalyst was significantly improved by the introduction of CuCl2. Nitrogen adsorption, XRD, XRF and XPS were used to characterize the catalysts. The results indicated that CuCl2 was well loaded and highly dispersed on the catalyst surface, and that CuCl2 played an important role for Hg0 catalytic oxidation. The effects of individual flue gas components on Hg0 oxidation were also investigated over CuCl2-SCR catalyst at 350 oC. The co-presence of NO and NH3 remarkably inhibited Hg0 oxidation, while this inhibiting effect was gradually scavenged with the decrease of GHSV. Further study revealed the possibility of simultaneous removal of Hg0 and NO over CuCl2-SCR catalyst in simulated flue gas. The mechanism of Hg0 oxidation was also investigated.
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Meng Fanchao,Wu Yuying,Li Wenbo,Hu Kaiqi,Zhao Kai,Yang Huabing,Gao Tong,Sun Yue,Liu Xiangfa 한국물리학회 2022 Current Applied Physics Vol.39 No.-
Evolution of the heat-resistant phases and deformation behavior of α-Al matrix of four alloys have been characterized by SEM and EBSD. The strengthening mechanisms influenced by morphology and distribution of the heat-resistant phases were described. And the strain contouring of the α-Al matrix after deformation was rendered. The heat-resistant phases with block-like as reticular or semi-reticular network distribution exist in grain boundary can effectively provide elevated-temperature strength for alloys, while the strain contouring of α-Al matrix is mainly concentrated in the area with fewer intermetallic phases. It is shown that intermetallic phase evolution corresponds to extrusion treatment and the formation of eutectic Si and primary Si, highly interconnected networks of intermetallic phases exist in the alloy in which the primary Si and the eutectic Si are simultaneously present or disappeared. And only the disappearance of the primary Si and the extrusion treatment will destroy the network structure of the intermetallic phases. A reticular or semi-reticular microstructure is more capable of matching strength and plasticity and facilitating uniform deformation of the α-Al matrix. And the destruction of this microstructure is allowed to accommodate more plastic strain before failure.
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Zhang Tao,Zhi Junrui,Liu Yong,Yue Wenbo,Zeng Guang 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.2
Calcium ion (Ca 2+ ) plays an important role in plant–insect interactions. Ethylene glycol-bis(2-aminoethylether)-N, N, N ′ , N ′ -tetraacetic acid (EGTA), a Ca 2+ chelator, can abolish Ca 2+ in plant cells following the disruption of plant physiological processes and the plant’s defense responses against biotic stress. To clarify whether EGTA pretreatment plants have an inhibitory effect on insect feeding induction, we determined variations in kidney bean (Phaseolus vulgaris (L., Fabales: Fabaceae)) plant defense responses induced by western flower thrips (WFT) (Frankliniella occidentalis (Pergande)) feeding and the reversal effects of EGTA. The results showed that WFT feeding can significantly activate the expression level of the jasmonic acid (JA) pathway marker genes allene oxide synthase (AOS) and lipoxygenase (LOX) and salicylic acid (SA) pathway marker genes phenylalanine ammonia lyase (PAL) and β-1,3 glucanase (PR-2), and induce the biosynthesis of JA and SA. However, pre treatment with EGTA showed varying degrees of reversal effects on JA and SA content and related gene expression levels with WFT feeding. These results indicate that WFT feeding can induce the biosynthesis of JA and SA and the expression of related genes to enhance the defense responses in kidney beans plants, while pretreatment with EGTA can attenuate the WFT-induced defense responses.
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