Search scope:
排序: Display mode:
Na Li, Xin Xing, Yonggang Sun, Jie Cheng, Gang Wang, Zhongshen Zhang, Zhengping Hao
Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1284-3
Keywords: Hydrotalcite-derived mixed oxides <i>oi>-chlorophenol Catalytic oxidation Organic by-products
Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1519-6
• 4-chlorophenol biodegradation could be enhanced in Fe2O
Keywords: Dechlorination Fe2O3 nanoparticles Electron transfer Microbial community
The impact of hypoxia in hepatocellular carcinoma metastasis
Carmen Chak-Lui Wong, Alan Ka-Lun Kai, Irene Oi-Lin Ng
Frontiers of Medicine 2014, Volume 8, Issue 1, Pages 33-41 doi: 10.1007/s11684-013-0301-3
Hypoxia is a common phenomenon in hepatocellular carcinoma (HCC). Hypoxia stabilizes transcription factor, hypoxia-inducible factor (HIF), to activate gene transcription. Expression of HIF is closely associated with metastasis and poor prognosis in HCC. HIF mediates expression of genes that are involved in every step of HCC metastasis including epithelial-mesenchymal transition, invasion of the extracellular matrix, intravasation, extravasation, and secondar y growth of the metastases. Because HIF is the central regulator of HCC metastasis, HIF inhibitors are attractive tools when used alone or as combined treatment to curb HCC metastasis. This review will summarize the current findings on the impact of hypoxia/HIF in HCC, with a particular focus on cancer metastasis.
Keywords: hypoxia hepatocellular carcinoma (HCC) metastasis hypoxia-inducible factor (HIF)
Epigenetic dysregulation in hepatocellular carcinoma: focus on polycomb group proteins
Sandy Leung-Kuen Au, Irene Oi-Lin Ng, Chun-Ming Wong
Frontiers of Medicine 2013, Volume 7, Issue 2, Pages 231-241 doi: 10.1007/s11684-013-0253-7
Hepatocellular carcinoma (HCC) development is characterized by the presence of epigenetic alterations, including promoter DNA hypermethylation and post-translational modifications of histone, which profoundly affect expression of a wide repertoire of genes critical for cancer development. Emerging data suggest that deregulation of polycomb group (PcG) proteins, which are key chromatin modifiers repressing gene transcription during developmental stage, plays a causative role in oncogenesis. PcG proteins assemble into polycomb repressive complex 1 (PRC1) and polycomb repressive complex 2 (PRC2) to impose the histone H3 lysine 27 trimethylation (H3K27me3) modification for repression. In this review, we will first recapitulate the mechanisms of two key epigenetic pathways: DNA methylation and histone modifications. Specifically, we will focus our discussion on the molecular roles of PcG proteins. Next, we will highlight recent findings on PcG proteins, their clinicopathological implication and their downstream molecular consequence in hepatocarcinogenesis. Last but not least, we will consider the therapeutic potential of targeting enhancer of zeste homolog 2 (EZH2) as a possible treatment for HCC. Improving our understanding on the roles of PcG proteins in hepatocarcinogenesis can benefit the development of epigenetic-based therapy.
Keywords: liver cancer epigenetics histone modifications polycomb group proteins enhancer of zeste homolog 2 (EZH2)
Daniel Wai-Hung Ho,Alan Ka-Lun Kai,Irene Oi-Lin Ng
Frontiers of Medicine 2015, Volume 9, Issue 3, Pages 322-330 doi: 10.1007/s11684-015-0408-9
Keywords: TCGA whole-transcriptome sequencing HCC liver cancer
Asghar RAHMATI,Lohrasb FARAMARZI,Manouchehr SANEI
Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4, Pages 448-455 doi: 10.1007/s11709-014-0262-x
Keywords: <i>JHi> classification <i>Qi> and <i>RMRi> classification new method
Shengwen Tang,Yuting Hu,Shengfu Zhong,Peigao Luo
Engineering 2018, Volume 4, Issue 4, Pages 500-506 doi: 10.1016/j.eng.2018.06.004
Powdery mildew, which is caused by Blumeria graminis f. sp. tritici (Bgt), is an important leaf disease that affects wheat yield. Powdery mildew-resistance (Pm) gene Pm21 was first transferred into wheat in the 1980s, by translocating the Heuchera villosa chromosome arm 6VS to the wheat chromosome arm 6AL (6VS·6AL). Recently, new Bgt isolates that are virulent to Pm21 have been identified in some wheat fields, indicating that wheat breeders should be aware of the risk of deploying Pm21, although pathological details regarding these virulent isolates still remain to be discovered. Pm40 was identified and mapped on the wheat chromosome arm 7BS from several wheat lines developed from the progenies of a wild cross between wheat and Thinopyrum intermedium. Pm40 offers a broad spectrum of resistance to Bgt, which suggests that it is likely to provide potentially durable resistance. Cytological methods did not detect any large alien chromosomal segment in the wheat lines carrying Pm40. Lines with Pm40 and promising agronomical traits have been released by several wheat-breeding programs in the past several years. Therefore, we believe that Pm40 will play a role in powdery mildew-resistance wheat breeding after Pm21 resistance is overcome by Bgt isolates. In addition, both Pm21 and Pm40 were derived from alien species, suggesting that the resistance genes derived from alien species are potentially more durable or effective than those identified from wheat.
Keywords: Wheat Powdery mildew <i>Pm21i> <i>Pm40i> Alien species Native resistance
NiFeRuO<i>xi> nanosheets on Ni foam as an electrocatalyst for efficient
Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11, Pages 1698-1706 doi: 10.1007/s11705-023-2334-8
Keywords: NiFeRuO<i>xi> nanosheets Ni foam electrocatalysis overall seawater splitting solar-driven
Presence and Antimicrobial Susceptibility of RE-<i>cmeABCi>-Positive <i>Campylobacteri> Isolated Article
Dejun Liu, Weiwen Liu, Xing Li, Hong Yao, Zhangqi Shen, Yang Wang, Jianzhong Shen
Engineering 2020, Volume 6, Issue 1, Pages 34-39 doi: 10.1016/j.eng.2019.10.013
Campylobacter spp. (C. spp.) are the leading cause of human gastroenteritis worldwide. RE-CmeABC is a newly identified resistance-enhancing multidrug efflux pump of C. spp. that confers high-level resistance to fluoroquinolones, phenicols, macrolides, and tetracyclines, all of which are critical drugs in both human and veterinary medicine. In this study, we analyzed the presence and antimicrobial susceptibility of RE-cmeABC-positive Campylobacter isolates of food-animal origin from three representative regions (Shandong, Shanghai, and Guangdong) in China over three successive years, from 2014 to 2016. A total of 1088 Campylobacter isolates (931 C. coli and 157 C. jejuni) were recovered from the RE-cmeABC screening. We detected 122 (11.2%) RE-cmeABC-positive isolates of chicken origin, including 111 (70.7%) C. jejuni and 11 (1.2%) C. coli. This multidrug efflux pump is more prevalent among C. jejuni than C. coli. The level of resistance was significantly different in 111 RE-cmeABC-positive C. jejuni versus 46 RE-cmeABC-negative C. jejuni for florfenicol, clindamycin, and erythromycin (P < 0.05), but not for ciprofloxacin (CIP), tetracycline (TET), and gentamicin. However, the isolates harboring RE-cmeABC could shift the minimum inhibitory concentration distribution to the higher range for CIP and TET. Pulsed-field gel electrophoresis (PFGE) analysis suggested that horizontal transmission might be involved in the dissemination of RE-cmeABC in Shanghai and Guangdong, while clonal expansion was predominant in Shandong. Three isolates shared the indiscriminate PFGE types of RE-cmeABC-positive C. jejuni isolates in Shanghai and Guangdong, and four isolates in Shanghai and Shandong. Our study suggests the possibility of a wide dissemination of RE-cmeABC in Campylobacter of food-animal origin, which would pose a significant threat to public health.
Keywords: RE-<i>cmeABCi> <i>Campylobacteri> Ciprofloxacin Florfenicol
A highly efficient methodology for the preparation of
Yongxin Zhang, Shucheng Wang, Yaodong Huang
Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3, Pages 679-686 doi: 10.1007/s11705-020-1979-9
Keywords: <i>Ni>-methoxyl carbazole dimeric <i>Ni>-methoxyl carbazole alkaloid total synthesis double <i>Ni>-arylation of methoxyamine
Lin Chen, Jing Feng
Engineering 2020, Volume 6, Issue 2, Pages 177-184 doi: 10.1016/j.eng.2019.12.006
Ferroelastic ABO4 type RETaO4 and RENbO4 ceramics (where RE stands for rare earth) are being investigated as promising thermal barrier coatings (TBCs), and the mechanical properties of RETaO4 have been found to be better than those of RENbO4. In this work, B-site substitution of tantalum (Ta) is used to optimize the thermal and mechanical properties of EuNbO4 fabricated through a solid-state reaction (SSR). The crystal structure is clarified by means of X-ray diffraction (XRD) and Raman spectroscopy; and the surface microstructure is surveyed via scanning electronic microscope (SEM). The Young's modulus and the thermal expansion coefficient (TEC) of EuNbO4 are effectively increased; with respective maximum values of 169 GPa and 11.2×10–6 K–1 (at 1200 °C). The thermal conductivity is reduced to 1.52 W·K−1·m−1 (at 700 °C), and the thermal radiation resistance is improved. The relationship between the phonon thermal diffusivity and temperature was established in order to determine the intrinsic phonon thermal conductivity by eliminating the thermal radiation effects. The results indicate that the thermal and mechanical properties of EuNbO4 can be effectually optimized via the B-site substitution of Ta, and that
this proposed material can be applied as a high-temperature structural ceramic in future.
Keywords: Thermal barrier coatings Rare earth niobates Substitution Thermal conductivity Thermal expansion coefficients Young’s modulus
Michela CIGOLA,Yibing FANG
Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1, Pages 3-11 doi: 10.1007/s11465-015-0359-5
Keywords: Vitruvius’ <i>De Architecturai> Xu Guangqi’s <i>Taixi Shuifai> Jesuit missionaries Italian Renaissance
Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5, Pages 1199-1208 doi: 10.1007/s11709-021-0749-1
Keywords: uncertainties <i>Vi> S– <i>Ni> correlations <i>Vi> S30 SPT data statistical
<i>RR1i> and <i>RR2i> gene deletion affects the immunogenicity of a live attenuated pseudorabies
Shijun YAN,He YAN,Chaolin ZHANG,Tongyan WANG,Qingyuan YANG,Zhe SUN,Yan XIAO,Feifei TAN,Xiangdong LI,Kegong TIAN
Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 1, Pages 81-86 doi: 10.15302/J-FASE-2016088
Keywords: pseudorabies virus <i>RR1i> and <i>RR2i> ribonucleotide reductase vaccine candidate
Efficient acetoin production from pyruvate by engineered whole-cell biocatalysis
Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4, Pages 425-436 doi: 10.1007/s11705-022-2229-0
Keywords: acetoin pyruvate <i>αi>-acetolactate synthetase <i>αi>-acetolactate decarboxylase <i>Halomonasbluephagenesisi> whole-cell biocatalysis
Title Author Date Type Operation
Catalytic oxidation of
Na Li, Xin Xing, Yonggang Sun, Jie Cheng, Gang Wang, Zhongshen Zhang, Zhengping Hao
Journal Article
Enhanced 4-chlorophenol biodegradation by integrating FeO nanoparticles into an anaerobic reactor: Long-term
Journal Article
The impact of hypoxia in hepatocellular carcinoma metastasis
Carmen Chak-Lui Wong, Alan Ka-Lun Kai, Irene Oi-Lin Ng
Journal Article
Epigenetic dysregulation in hepatocellular carcinoma: focus on polycomb group proteins
Sandy Leung-Kuen Au, Irene Oi-Lin Ng, Chun-Ming Wong
Journal Article
TCGA whole-transcriptome sequencing data reveals significantly dysregulated genes and signaling pathways in hepatocellular carcinoma
Daniel Wai-Hung Ho,Alan Ka-Lun Kai,Irene Oi-Lin Ng
Journal Article
Development of a new method for RMR and Q classification method to optimize support system in tunneling
Asghar RAHMATI,Lohrasb FARAMARZI,Manouchehr SANEI
Journal Article
The Potential Role of Powdery Mildew-Resistance Gene <i>Pm40i> in Chinese Wheat-Breeding Programs inthe Post-<i>Pm21i> Era
Shengwen Tang,Yuting Hu,Shengfu Zhong,Peigao Luo
Journal Article
Presence and Antimicrobial Susceptibility of RE-<i>cmeABCi>-Positive <i>Campylobacteri> Isolated
Dejun Liu, Weiwen Liu, Xing Li, Hong Yao, Zhangqi Shen, Yang Wang, Jianzhong Shen
Journal Article
A highly efficient methodology for the preparation of
Yongxin Zhang, Shucheng Wang, Yaodong Huang
Journal Article
Thermal and Mechanical Properties Optimization of <i>ABi>O4 Type EuNbO4 By the<i>Bi>-Site Substitution of Ta
Lin Chen, Jing Feng
Journal Article
Traces and echoes of <i>De Architecturai> by Marcus Vitruvius Pollio in the work of Xu Guangqi in 17th
Michela CIGOLA,Yibing FANG
Journal Article
Accounting for the uncertainties in the estimation of average shear wave velocity using – correlations
Journal Article
<i>RR1i> and <i>RR2i> gene deletion affects the immunogenicity of a live attenuated pseudorabies
Shijun YAN,He YAN,Chaolin ZHANG,Tongyan WANG,Qingyuan YANG,Zhe SUN,Yan XIAO,Feifei TAN,Xiangdong LI,Kegong TIAN
Journal Article