393 results on '"Feng, Zhigang"'
Search Results
202. High sensitivity spectroscopy of cesium Rydberg atoms using electromagnetically induced transparency
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Zhao, Jianming, primary, Zhu, Xingbo, additional, Zhang, Linjie, additional, Feng, Zhigang, additional, Li, Changyong, additional, and Jia, Suotang, additional
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- 2009
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203. Design and analysis of a self-validating pressure transducer
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Feng, Zhigang, primary and Xu, Tao, additional
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- 2009
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204. Design and Implementation of a Self-Validating Pressure Sensor
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Feng, Zhigang, primary, Wang, Qi, additional, and Shida, Katsunori, additional
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- 2009
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205. Precipitation and responding damping behavior of heat-treated AZ31 magnesium alloy
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WAN, Diqing, primary, WANG, Jincheng, additional, WANG, Gaifang, additional, LIN, Lin, additional, FENG, Zhigang, additional, and YANG, Gencang, additional
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- 2009
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206. Using SSRS marker biotechnology to analyze genetic variability in five populations of sea cucumber from China, Russia, South Korea and Japan
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Feng, Zhigang, primary, Yu, Jiaping, additional, Ding, Jun, additional, Tian, Yi, additional, and Chang, Yaqing, additional
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- 2008
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207. Parameter optimization of LS-SVM for regression using NGA
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Wang, Qi, primary, Feng, Zhigang, additional, and Shida, Katsunori, additional
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- 2007
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208. A review of self‐validating sensor technology
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Feng, Zhigang, primary, Wang, Qi, additional, and Shida, Katsunori, additional
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- 2007
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209. ON THE MINKOWSKI DIMENSION OF FUNCTIONAL DIGRAPH
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FENG, ZHIGANG, primary and CHEN, GANG, additional
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- 2003
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210. History terms in the heat and mass transfer equations of particles
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Michaelides, Efstathios E., primary and Feng, Zhigang, additional
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- 2002
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211. CONSTRUCTING MULTIPLE WAVELET PACKETS WITH FIFS
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CHEN, GANG, primary and FENG, ZHIGANG, additional
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- 2001
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212. Luminescent properties of Ce3+/Tb3+co-doped glass ceramics containing YPO4nanocrystals for W-LEDs
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ZHANG, Zhixiong, ZHANG, Yuepin, FENG, Zhigang, Cheng, WANG, XIA, Haiping, and ZHANG, Xinmin
- Abstract
Ce3+/Tb3+co-doped transparent glass ceramics containing YPO4nanocrystals were prepared using high temperature melting method, and their structural and luminous properties were investigated. XRD analysis and TEM images confirmed the existence of YPO4nanocrystals in glass ceramics. The transmission spectra proved that the glass ceramics specimens still maintained a high transparency. Then the excitation and emission spectra of the Ce3+and Tb3+single-doped and co-doped glass and glass ceramics were discussed, which proved that the glass ceramics had better luminescent properties. Under the near ultraviolet (331 nm) excitation, the broadband emission located at 385 nm was observed which was ascribed to 5d→2F5/2and 2F7/2transition of Ce3+ions. Several characteristic sharp peaks centered at 489, 543, 578 and 620 nm originated from the 5D4to 7FJ(J=6, 5, 4, 3) of Tb3+ions. The decay time of Tb3+ions at 543 nm and the relevant energy levels of Ce3+ions and Tb3+ions illustrated the transfer process from Ce3+ions to Tb3+ions. The best CIE chromaticity coordinate of the glass ceramics specimen was calculated as (x=0.3201, y=0.3749), which was close to the NTSC standard values for white (x=0.333, y=0.333). All the results suggested that the YPO4-based Ce3+/Tb3+co-doped glass ceramics could act as potential luminescent materials for white light-emitting diodes.
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- 2016
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213. Efficient upconversion luminescence in Er3+/Yb3+co-doped cubic NaYF4single crystals by vertical Bridgman method with KF flux
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He, Shinan, Xia, Haiping, Tang, Qingyang, Sheng, Qiguo, Wang, Cheng, Feng, Zhigang, Jiang, Dongsheng, Gu, Xuemei, Zhang, Jianli, Jiang, Haochuan, and Chen, Baojiu
- Abstract
Er3+/Yb3+co-doped α-NaYF4single crystals with various Yb3+concentrations and ∼0.50 mol% Er3+were grown by Bridgman method using Potassium fluoride as flux. The up-conversion (UC) luminescence and its pump power dependence on UC emission of the crystals under excitation of 980 nm laser diode were investigated. The UC emissions at green ∼522 nm, ∼541 nm and red ∼668 nm, which are attributed to 2H11/2 → 4I15/2, 4S3/2 → 4I15/2and 4F9/2 → 4I15/2, respectively, were obtained in Er3+/Yb3+doped α-NaYF4single crystals. The quadratic dependence of pump power on the UC emission suggests that a two-photon process is responsible for the transition from the excited Yb3+to the lower state of Er3+ions in α-NaYF4single crystals. A favorable performance of yellowish green light can be achieved with certain Yb3+concentrations and 0.52 mol% Er3+co-doped samples that makes further research valuable in developing UC displays for electro-optical devices.
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- 2016
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214. Drag Coefficients of Viscous Drops
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Feng, Zhigang, additional and Michaelides, Efstathios E., additional
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- 2000
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215. A Note on Helmholtz Attenuators With Air Cavity and Membrane
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Wang, Xiaodong, additional and Feng, Zhigang, additional
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- 1998
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216. On Stability of Fractal Interpolation
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Feng, Zhigang, primary and Xie, Heping, additional
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- 1998
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217. Transient Response of Distributed Parameter Systems
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Zhou, Jianping, additional and Feng, Zhigang, additional
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- 1997
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218. Heat transfer from a rigid sphere in a nonuniform flow and temperature field
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Michaelides, Efstathios E., primary and Feng, Zhigang, additional
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- 1994
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219. The preliminary study of incorporating tetrapod-like zinc oxide whisker on the antibacterial activity of soft denture liners.
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Xiao Yue, Du Ying, Wang Jianping, Feng Zhigang, Zhuo Lang, and Song Xin
- Abstract
Objective To research the effects of incorporating tetrapod-like zinc oxide whisker (T-ZnOw) of different proportions on the antibacterial activity of different kinds of soft denture liners. Methods The minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of T-ZnOw against Saccharomyces albicans (S.albicans) were examined by the broth dilution test. Add T-ZnOw 0%, 1%, 2%, 3% to Silagum soft denture liners and soft denture liners respectively. The antimicrobial rate of S.albicans was determined by the membrane covering method. Results The MIC of T-ZnOw against S.albicans was 78 μg.mL
-1 and the MBC was 156 μg.mL-1 . Comparing 1%, 2%, 3% T-ZnOw group with control group, the results showed significant difference (P<0.05). And as the T-ZnOw antibacterial agent added ratio increased, antibacterial increased significantly. Conclusion The soft denture liners incorporating with 1%, 2%, 3% of T-ZnOw can improve antibacterial activity. Following the increased proportions of T-ZnOw, antibacterial rate was significantly increasing. [ABSTRACT FROM AUTHOR]- Published
- 2011
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220. INTEGRATION AND FOURIER TRANSFORM OF FRACTAL INTERPOLATION FUNCTIONS.
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FENG, ZHIGANG, TIAN, LIXIN, and JIAO, JIANLI
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CONTINUOUS functions , *FOURIER transforms , *FOURIER analysis , *INTERPOLATION - Abstract
Fractal interpolation function (FIF) is continuous on its interval of definition. As a special kind of continuous function, FIFs' integrations on various scales and Fourier transform are studied in this paper. All of them can be expressed by the parameters of the corresponding iterative function systems. [ABSTRACT FROM AUTHOR]
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- 2005
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221. On star product fractal surfaces and their dimensions.
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Xie Heping, Feng Zhigang, and Chen Zhida
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FRACTALS , *GEOMETRIC surfaces , *DIMENSIONS , *INTEGRAL theorems , *CURVES , *WIENER processes - Abstract
In this paper, by using fractal curves, a family of fractal surfaces are defined. Each fractal surface of this family is called Star Product Fractal Surface (SPFS). A theorem of the dimensions of the SPFS is strictly proved. The relationship between the dimensions of the SPFS and the dimensions of the fractal curves constructing the SPFS is obtained. [ABSTRACT FROM AUTHOR]
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- 1999
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222. Single Jet Mixing at Arbitrary Angle in a Turbulent Tube Flow.
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Feng, Zhigang and Wang, Xiaodong
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TURBULENCE ,FLUID dynamics ,PIPELINES - Abstract
Presents an asymptotic procedure to evaluate the tracer trajectory in a two-stream turbulent pipe mixing unit with an oblique branch. Areas where the problem of mixing two fluid streams by turbulent jet injection into a pipeline has various applications; Details on jet injection at an arbitrary angle; Conclusion.
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- 1999
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223. Nonorthogonal Wavelet Packets with r Scaling Functions
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Feng, Zhigang and Chen, Gang
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In this paper, we discuss the multiresolution analysis generated by finite scaling functions φ 1, φ 2,... , φ, rin L2(R). We also consider the direct wavelet decomposition and direct wavelet packet decomposition in L2(R). Besides, we obtain some results about (dual) nonorthogonal wavelet packet as well as the stability of the basis generating the packet. At last, we give an example of nonorthogonal wavelet packets of multiplicity r by using fractal interpolation functions.
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- 2001
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224. P5A ATPase controls ER translocation of Wnt in neuronal migration
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Li, Tingting, Yang, Xiaoyan, Feng, Zhigang, Nie, Wang, Fang, Zhiyu, and Zou, Yan
- Abstract
The Wnt family contains conserved secretory proteins required for developmental patterning and tissue homeostasis. However, how Wnt is targeted to the endoplasmic reticulum (ER) for processing and secretion remains poorly understood. Here, we report that CATP-8/P5A ATPase directs neuronal migration non-cell autonomously in Caenorhabditis elegansby regulating EGL-20/Wnt biogenesis. CATP-8 likely functions as a translocase to translocate nascent EGL-20/Wnt polypeptide into the ER by interacting with the highly hydrophobic core region of EGL-20 signal sequence. Such regulation of Wnt biogenesis by P5A ATPase is common in C. elegansand conserved in human cells. These findings describe the physiological roles of P5A ATPase in neural development and identify Wnt proteins as direct substrates of P5A ATPase for ER translocation.
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- 2021
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225. CATP-8/P5A ATPase Regulates ER Processing of the DMA-1 Receptor for Dendritic Branching.
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Feng, Zhigang, Zhao, Yupeng, Li, Tingting, Nie, Wang, Yang, Xiaoyan, Wang, Xinjian, Wu, Jianguo, Liao, Jun, and Zou, Yan
- Abstract
Dendrite morphogenesis is essential for a neuron to establish its receptive field and is, thus, the anatomical basis for the proper functioning of the nervous system. The molecular mechanisms governing dendrite branching are not fully understood. Using the multi-dendritic PVD neuron in the nematode Caenorhabditis elegans , we identify CATP-8/P5A ATPase as a key regulator of dendrite branching that controls the translocation of the DMA-1 receptor to the endoplasmic reticulum (ER). The specific signal peptide of DMA-1 and the ATPase activity of CATP-8 are essential for this process. Our results reveal that P5A ATPase may regulate protein translocation in the ER. • P5A ATPase/CATP-8 is required for dendrite morphogenesis • CATP-8 regulates DMA-1 protein level by translocation into the endoplasmic reticulum • P5A ATPase function is evolutionarily conserved to regulate DMA-1 translocation • CATP-8 regulation of DMA-1 translocation is specific to the DMA-1 signal peptide Feng et al. reveal a role for the conserved P5A ATPase/CATP-8 in dendrite morphogenesis. CATP-8 controls the translocation of the DMA-1 receptor into the endoplasmic reticulum specifically through the DMA-1 signal peptide. This provides insights into the physiological and biochemical functions of P5A ATPases in metazoans. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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226. Unsteady heat and mass transfer from a spheroid
- Author
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Feng, ZhiGang and Michaelides, Efstathios E.
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The unsteady heattransfer processes from oblate or prolate spheroids, at the limit of very small Peclet numbers is examined. A perturbation technique for the temperature and the geometry of the particle is used to obtain the rates of heat and mass transfer, first in the Laplace and then in the time domain. A solution to the problem is obtained, including the 2contribution is the eccentricity. The solution reveals the existence of several history terms, which are analogous to the history terms of the creeping flow equation of motion. One of these terms is solely due to the eccentricity of the spheroid. This is an indication that the shape of the particle is a factor of the existence and from of history terms. In addition, an exact expression for the steadystate heat transfer from a spheroid is obtained using a convenient transformation of the heattransfer integral.
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- 1997
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227. A preliminary study on soil radon anomaly and its formation mechanism in karst area of southwest China.
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Ma, Qiang, Zhou, Bingjie, Feng, Zhigang, Bai, Jialing, Zhang, Lanying, and Liu, Wei
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RADON , *KARST , *SOIL formation , *SOIL air , *SOIL weathering , *CARBONATE rocks - Abstract
Soil radon anomaly is a common phenomenon in karst areas. In this paper, the geochemical behavior of radium (Ra) in the process of carbonate rock weathering and soil formation was used to reveal the accumulation mechanism of soil radon. In the karst area and non-karst area, 24 soil points were collected to measure radon and radium, and a carbonate weathering profile was collected in the karst area. The research showed that: (1) the theoretical radon value obtained from Ra is far greater than the radon value measured on site, indicating that soil Ra can provide a potential source for the source of soil Rn; (2) through the study of the geochemical behavior of Ra during the weathering process, it was found that Ra was significantly enriched during carbonate weathering. This paper deepened the understanding of the geochemical behavior of radionuclides (Ra, Rn) in karst environments. [ABSTRACT FROM AUTHOR]
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- 2022
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228. In vivoimaging of a PVD neuron in Caenorhabditis elegans
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Wang, Xinjian, Li, Tingting, Hu, Jiawen, Feng, Zhigang, Zhong, Rui, Nie, Wang, Yang, Xiaoyan, and Zou, Yan
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The nematode Caenorhabditis elegansnociceptive PVD neurons have highly ordered dendritic branches, making this an ideal model to study the development and organization of dendrites. A ser-2-promoter-driven GFP reporter line wyIs592[ser-2prom-3p::myr-GFP] provides a comprehensive visualization of PVD anatomy. Here, we describe the detailed procedures for imaging a PVD neuron using wyIs592at late L4 larval stage in vivoby confocal microscopy. This protocol can also be applied to imaging other cells in C. elegans.
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- 2021
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229. Measurement of Polarizability of Cesium $n$D State in Magneto-Optical Trap
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Zhao, Jianming, Zhang, Hao, Feng, Zhigang, Zhu, Xingbo, Zhang, Linjie, Li, Changyong, and Jia, Suotang
- Abstract
The Stark spectrum of cesium $n$D ($n = 39{\mbox{--}}50$) Rydberg atoms are obtained by a state-selective field ionization method in a magneto-optical trap (MOT). The Stark shifts of Rydberg atoms are measured experimentally, the scalar and tensor polarizabilities of Rydberg atoms are obtained by fitting the experimental data, and the results are found to be in agreement with the existing theoretical calculations.
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- 2011
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230. On star product fractal surfaces and their dimensions
- Author
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Feng Zhigang, Chen Zhi-da, and Xie Heping
- Subjects
Surface (mathematics) ,Partial differential equation ,Fractal dimension on networks ,Applied Mathematics ,Mechanical Engineering ,Mathematical analysis ,Geometry ,Multifractal system ,Fractal dimension ,Fractal analysis ,Fractal ,Mechanics of Materials ,Star product ,Mathematics - Abstract
In this paper, by using fractal curves, a family of fractal surfaces are defined. Each fractal surface of this family is called Star Product Fractal Surface (SPFS). A theorem of the dimensions of the SPFS is strictly proved. The relationship between the dimensions of the SPFS and the dimensions of the fractal curves constructing the SPFS is obtained.
231. Ce^3+ ion-doped α-NaYF_4 single crystal for UV laser
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Jiang, Dongsheng, Xia, Haiping, Zhang, Jian, Feng, Zhigang, Wang, Cheng, Gu, Xuemei, Zhang, Yuepin, Jiang, Haochuan, and Chen, Baojiu
- Abstract
A Ce^3+ ion-doped α-NaYF_4 single crystal of high quality is grown successfully by an improved flux Bridgman method under the conditions of taking the chemical raw composition of NaF:KF:YF_3:CeF_3 in the molar ratio of 30∶18∶48∶4, where the KF is shown to be an effective assistant flux. The x ray diffraction, absorption spectra, excitation spectra, and emission spectra of the Ce^3+-doped α-NaYF_4 single crystal are measured to investigate the phase and optical properties of the single crystals. The absorption spectrum of the Ce^3+:α-NaYF_4 shows a strong band that peaks at the wavelength of 300 nm. The emission spectrum of the Ce^3+:α-NaYF_4 emits an intense ultraviolet (UV) band at the wavelength of 332 nm under the excitation of 300 nm light. Two separated luminous bands of 330 and 350 nm, which correspond to the transitions 5d?F_5/22 and 5d?F_7/22, can be obtained by Gauss fitting. The strong emission intensity at the UV band and the excellent optical transmission in the range of UV wavelengths indicate that Ce^3+:α-NaYF_4 single crystals can be considered as a promising material for UV lasers.
- Published
- 2016
232. Luminescence of Tb^3+/Eu^3+ codoped LiYF_4 single crystals under UV excitation for white-light LEDs
- Author
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Jiang, Yongzhang, Xia, Haiping, Yang, Shuo, Zhang, Jiazhong, Jiang, Dongsheng, Wang, Cheng, Feng, Zhigang, Zhang, Jian, Gu, Xuemei, Zhang, Jianli, Jiang, Haochuan, and Chen, Baojiu
- Abstract
The absorption spectra, excitation spectra, and emission spectra of Tb^3+/Eu^3+ ions in LiYF_4 single crystals synthesized by an improved Bridgman method are measured. The emission spectra of several bands, mainly located at blue ∼487??nm (Tb:D_45?F7_6), yellowish green ∼542??nm (Tb:D_45?F7_5), and red ∼611??nm (Eu:D_05?F7_2) wavelengths, are observed under excitation by UV light. An ideal white light emission as a result of simultaneous combination of these emissions can be obtained from 1.11 mol% Tb^3+ and 0.9??mol%???Eu^3+ co-doped LiYF_4 single crystals with chromaticity coordinates of x=0.3242, y=0.3389, color temperature T_c=5878??K, color rendering index R_a=77, and color quality scale Q_a=75 under excitation of 384 nm light. The chromaticity coordinate, color rendering index, and color quality scale can be modified by the change of the concentration of rare-earth dopants and the excitation wavelength.
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- 2015
233. Dark blue Cerenkov second harmonic generation in the two-layer-stacked hexagonal periodically poled MgO:LiNbO3s
- Author
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Ma, Chuanlong, Wang, Yufei, Liu, Lei, Fan, Xuedong, Qi, Aiyi, Feng, Zhigang, Yang, Feng, Peng, Qinjun, Xu, Zuyan, and Zheng, Wanhua
- Abstract
We report the dark blue nonlinear Cerenkov radiation by the second harmonic generation (SHG) in a two-layer-stacked hexagonal periodically-poled-MgO: LiNbO3s (PPMgOLNs). Based on the direct wafer bonding of two target PPMgOLNs rotating around the axis perpendicular to the plane with an angle of 30o, twelve bright spots as twice of those in a single PPMgOLN are shown at each second-harmonic C erenkov ring. The experimental results agree with the theoretical ones and present a promising application in the fabrication of three-dimensional (3D) PPMgOLNs.
- Published
- 2014
234. Broadband and polarization-insensitive subwavelength grating reflector for the near-infrared region
- Author
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Zhang, Rui, Wang, Yufei, Zhang, Yejin, Feng, Zhigang, Qi, Fan, Liu, Lei, and Zheng, Wanhua
- Abstract
We propose a polarization-insensitive and broadband subwavelength grating reflector based on a multilayer structure. The reflector has an overlapped high reflectivity (>99.5%) bandwidth of 248 nm between the TE and the TM polarizations, which is much higher than the previously reported results. We believe this subwavelength grating reflector can be applied to unpolarized devices.
- Published
- 2014
235. Infrared luminescent properties of Na5Lu9F32 single crystals co-doped Er3+/Yb3+ grown by Bridgman method.
- Author
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Wang, Cheng, Xia, Haiping, Feng, Zhigang, Zhang, Zhixiong, Jiang, Dongsheng, Gu, Xuemei, Zhang, Yuepin, Chen, Baojiu, and Jiang, Haochuan
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LUMINESCENCE , *SINGLE crystals , *FLUORIDES , *ERBIUM spectra , *YTTERBIUM spectra , *X-ray diffraction , *SEMICONDUCTOR lasers - Abstract
Na 5 Lu 9 F 32 single crystals co-doped with various Er 3+ /Yb 3+ concentrations were grown by an improved Bridgman method for the first time. The crystal structure is characterized by means of X-ray diffraction (XRD). High transmission in the range from 400 nm to 7150 nm and maximum phonon energy about 441 cm −1 for the Na 5 Lu 9 F 32 single crystals are obtained from the measured transmission and Raman spectra, respectively. The Judd-Ofelt parameters of Er 3+ in the obtained crystal was calculated and discussed according to the measured absorption spectra. Compared with the Er 3+ single-doped Na 5 Lu 9 F 32 crystal, an obviously enhanced emission band at 1500 nm was observed upon excitation of 980 nm laser diode (LD) via energy transfer from Yb 3+ to Er 3+ . Decay curve fitting using a Inokuti-Hirayama expression indicates dipole-dipole energy transfer from Yb 3+ to Er 3+ .The maximum emission cross section at ∼1.5 μm was also calculated to be 10.12 × 10 −20 cm 2 for the Na 5 Lu 9 F 32 single crystal of 1% Er 3+ and 6% Yb 3+ in molar fraction doping concentration. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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236. Infrared spectral properties for α-NaYF4 single crystal of various Er3+doping concentrations.
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Wang, Cheng, Xia, Haiping, Feng, Zhigang, Zhang, Zhixiong, Jiang, Dongsheng, Zhang, Jian, He, Shinan, Tang, Qingyang, sheng, Qiguo, Gu, Xuemei, Zhang, Yuepin, Chen, Baojiu, and Jiang, Haochuan
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SINGLE crystals , *EMISSION spectroscopy , *RADIATIVE lifetime , *ENERGY levels (Quantum mechanics) , *INFRARED lasers - Abstract
The α-NaYF 4 single crystals doped with 0.2 mol%, 0.5 mol%, 1 mol%, 2 mol% and 3 mol% Er 3+ ions were fabricated by an improved Bridgman method. The ~1.5 µm and ~2.7 µm emission properties were investigated in detail through the measured absorption and emission spectra. A Judd–Ofelt analysis of Er 3+ in α-NaYF 4 samples is performed. The Judd–Ofelt parameters are obtained (Ω 2 =2.71×10 −20 cm 2 , Ω 4 =2.28×10 −20 cm 2 , Ω 6 =0.84×10 −20 cm 2 ) and the radiative lifetimes of Er 3+ energy levels and the branching ratios of Er 3+ transitions are calculated. The calculated maximum emission cross section by McCumber theory for ~1.5 µm and ~2.7 µm reached 1.35×10 −20 cm 2 and 2.2×10 −20 cm 2 , respectively. The gain cross section spectra were calculated based on the absorption and emission cross section spectra. All these spectral properties indicated that this kind of fluoride crystal has potential application as host material for infrared lasers. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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237. A bibliometric analysis of oyster research from 1991 to 2014.
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Guo, Lin, Xu, Fei, Feng, Zhigang, and Zhang, Guofan
- Subjects
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OYSTERS , *AQUACULTURE , *CLIMATE change , *VIBRIO , *NUTRITION - Abstract
In this study, a bibliometric analysis was performed to evaluate the global scientific production on oyster research from the period of 1991 to 2014. This analysis was based on the Science Citation Index Expanded database. A total of 11,493 publications were identified, and two main aspects were analysed: (1) publication performance and (2) research emphases and trends. The result indicated the annual publications on oyster study increased in number. The USA published the most papers in this field and was the most frequent partner in international collaborations. Pierre Boudry and Ximing Guo were the two most productive authors. The most productive institution was the French Research Institute for Exploitation of the Sea. The Journal of Shellfish Research and Aquaculture were two most productive journals. Analyses of author keywords suggested that 'growth' was the most frequently used term followed by 'aquaculture'. The major research areas related to oysters were 'growth, reproduction and mortality', 'abiotic factors', 'biotic factors', 'immunity', 'ecology', 'pollution', 'nutrition', 'aquaculture and food safety' and 'methods or technology'. Researches about ' Vibrio parahaemolyticus', 'norovirus', ' Ostreid herpesvirus 1', 'climate change', 'ocean acidification' and 'pH' have become increasingly more common. 'Proteomics', 'transcriptome' and 'ecosystem services' have been the new research topics in recent years. Overall, our findings may serve as an alternative way to learn about trends in oyster research and contribute to future investigations. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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238. An integrative pan-cancer analysis of MASP1 and the potential clinical implications for the tumor immune microenvironment.
- Author
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Yu, Hongjun, Wang, Chaoqun, Ke, Shanjia, Xu, Yanan, Lu, Shounan, Feng, Zhigang, Bai, Miaoyu, Qian, Baolin, Xu, Yue, Li, Zihao, Yin, Bing, Li, Xinglong, Hua, Yongliang, Zhou, Menghua, Li, Zhongyu, Fu, Yao, and Ma, Yong
- Subjects
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TUMOR-infiltrating immune cells , *HEPATOCELLULAR carcinoma , *TUMOR microenvironment , *BIOMARKERS , *CELL lines - Abstract
Mannose-binding lectin-associated serine protease 1 (MASP1) plays a crucial role in the complement lectin pathway and the mediation of immune responses. However, comprehensive research on MASP1 across various cancer types has not been performed to date. This study aimed to evaluate the significance of MASP1 in pan-cancer. The Cancer Genome Atlas (TCGA), UCSC Xena and Genotype Tissue Expression (GTEx) databases were used to evaluate the expression profiles, genomic features, prognostic relevance, and immune microenvironment associations of MASP1 across 33 cancer types. We observed significant dysregulation of MASP1 expression in multiple cancers, with strong associations between MASP1 expression levels and diagnostic value as well as patient prognosis. Mechanistic insights revealed significant correlations between MASP1 levels and various immunological and genomic factors, including tumor-infiltrating immune cells (TIICs), immune-related genes, mismatch repair (MMR), tumor mutation burden (TMB), and microsatellite instability (MSI), highlighting a critical regulatory function of MASP1 within the tumor immune microenvironment (TIME). In vitro and in vivo experiments demonstrated that MASP1 expression was markedly decreased in liver hepatocellular carcinoma (LIHC). Moreover, the overexpression of MASP1 in hepatocellular carcinoma (HCC) cell lines significantly inhibited their proliferation, invasion and migration. In conclusion, MASP1 exhibits differential expression in the pan-cancer analyses and might play an important role in TIME. MASP1 is a promising prognostic biomarker and a potential target for immunological research, particularly in LIHC. [Display omitted] • MASP1 expression is significantly different in multiple cancer types. • MASP1 is downregulated in HCC and the downregulation of MASP1 is associated with the poor prognosis of HCC patients. • MASP1 could inhibit HCC proliferation and metastasis via the ERK/p38 MAPK signaling pathway. • MASP1 was proposed to be a potential target for cancer immunotherapy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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239. Identification and validation of ferroptosis-related hub genes and immune infiltration in liver ischemia-reperfusion injury.
- Author
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Li, Xinglong, Meng, Zhanzhi, Hua, Yongliang, Li, Zihao, Yin, Bing, Qian, Baolin, Yu, Hongjun, Li, Zhongyu, Zhou, Yongzhi, Feng, Zhigang, Lu, Shounan, Ke, Shanjia, Bai, Miaoyu, Fu, Yao, and Ma, Yong
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KILLER cells , *GENE expression , *POLYMERASE chain reaction , *GENE regulatory networks , *REPERFUSION injury - Abstract
Ischemia–reperfusion injury (IRI) is a cumulation of pathophysiological processes that involves cell and organelle damage upon blood flow constraint and subsequent restoration. However, studies on overall immune infiltration and ferroptosis in liver ischemia-reperfusion injury (LIRI) are limited. This study explored immune cell infiltration and ferroptosis in LIRI using bioinformatics and experimental validation. The GSE151648 dataset, including 40 matched pairs of pre- and post- transplant liver samples was downloaded for bioinformatic analysis. Eleven hub genes were identified by overlapping differentially expressed genes (DEGs), iron genes, and genes identified through weighted gene co-expression network analysis (WGCNA). Subsequently, the pathway enrichment, transcription factor-target, microRNA-mRNA and protein-protein interaction networks were investigated. The diagnostic model was established by logistic regression, which was validated in the GSE23649 and GSE100155 datasets and verified using cytological experiments. Moreover, several drugs targeting these genes were found in DrugBank, providing a more effective treatment for LIRI. In addition, the expression of 11 hub genes was validated using quantitative real-time polymerase chain reaction (qRT-PCR) in liver transplantation samples and animal models. The expression of the 11 hub genes increased in LIRI compared with the control. Five genes were significantly enriched in six biological process terms, six genes showed high enrichment for LIRI-related signaling pathways. There were 56 relevant transcriptional factors and two central modules in the protein-protein interaction network. Further immune infiltration analysis indicated that immune cells including neutrophils and natural killer cells were differentially accumulated in the pre- and post-transplant groups, and this was accompanied by changes in immune-related factors. Finally, 10 targeted drugs were screened. Through bioinformatics and further experimental verification, we identified hub genes related to ferroptosis that could be used as potential targets to alleviate LIRI. • We identified eleven hub genes related to ferroptosis in LIRI. • A promising diagnostic model was consturcted and verified. • We explored the relationship between immune infiltration and hub genes in LIRI. • Ten potential drugs were identified that target the hub genes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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240. Late Triassic granites (ca. 230 Ma) from Cairi area in eastern Qiangtang subterrane, central Tibet: Product of a mid‐oceanic ridge subduction.
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He, Haiyang, Li, Yalin, Wang, Tingting, Xiao, Siqi, Wang, Zhengqing, Chen, Liang, Feng, Zhigang, Han, Shili, Liu, Shan, Zhang, Yuqian, and Tang, Zhenping
- Subjects
- *
MID-ocean ridges , *GRANITE , *SUBDUCTION , *ISLAND arcs , *TRIASSIC Period , *RARE earth metals , *URANIUM-lead dating - Abstract
Although a large number of Triassic magmatism were found in the Qiangtang terrane, central Tibet, the tectonic evolution of the Shuanghu Palaeo‐Tethys Ocean remains controversial. In this study, we present the zircon U–Pb age and major‐ and trace‐element data for the Late Triassic pluton from the Cairi area in the eastern Qiangtang terrane. Zircon U–Pb dating indicates that the samples were emplaced at ca. 230 Ma. The magmatism from the Cairi area primarily consists of granites (SiO2 = 67.28–77.74), with the characteristics of medium‐K calc‐alkaline, metaluminous, and peraluminous. The Cairi granites are enriched light rare earth elements ([La/Yb]N = 5.01–10.56), with obvious Eu anomaly (Eu/Eu* = 0.32–0.47). The Cairi granites are characterized by low 1,000 × Ga/Al (2.10–2.64), FeO*/MgO (3.41–5.03), Ce (57.95–114.36 ppm), Y (27.30–45.19 ppm), and negative correlation between P2O5 and SiO2. These geochemical features reveal that the Cairi granites are calc‐alkaline, I‐type granites. The four samples show relatively restricted (87Sr/86Sr)i ratios (0.70598–0.70724), 143Nd/144Nd ratios (0.51192–0.51196), and εNd(t) of −8.19 to −7.54. Based on the variations of Rb–Sr–Ba and Th–La–Nb and the zircon saturation of temperatures (806–868°C), we suggest that the primary magmas of the Cairi granites were generated through various degrees of mixing between sediments and mantle‐derived components. Petrological and geochemical characteristics, as well as regional geological characteristics indicate that the Cairi granites formed in a continental volcanic arc setting. Our results, in combination with the coeval granites and elcogite, indicate that the generation of Late Triassic (ca. 230 Ma) Cairi granites is related to ocean ridge subduction and subsequent development of a slab window. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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241. Damping properties of Mg–Ca binary alloys
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Wan, Diqing, Wang, Jincheng, Lin, Lin, Feng, Zhigang, and Yang, Gencang
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ELECTROMECHANICAL analogies , *BINARY metallic systems , *CHEMICAL systems , *PHYSICAL metallurgy - Abstract
Abstract: The dynamic mechanical analysis (DMA) was applied to investigate the damping properties of Mg–Ca binary alloys both at room and elevated temperatures. The results show the as-cast Mg–1wt%Ca binary alloy exhibits good damping capacities, which could be of a potential candidate for damping magnesium alloys. The Ca has greatly effect on the damping properties of Mg–Ca alloys. In addition, the damping measurement of Mg–1wt%Ca alloy with increasing temperature has also been carried out. The damping mechanisms were also discussed. [Copyright &y& Elsevier]
- Published
- 2008
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242. A novel left ventricular assist device with impeller pump and brushless motor compacted in one unit.
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Qian Kunxi, Zeng Pei, Ru Weimin, Yuan Haiyu, Feng Zhigang, and Li Lan
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IMPELLERS , *BLOOD circulation , *LABORATORY animals - Abstract
Designs a left ventricular assist device with impeller pump and brushless motor compacted in one unit to assist the blood circulation of an experimental calves. Creation of a ceramic bearing and a purge system through the bearing; Schematic diagram of the of the device; Implantation of diaphragm pump according to the systole of the natural heart.
- Published
- 2001
243. Integrated geophysical exploration of the coupling of a concealed rock body and metallogenic structures—Ag-Pb-Zn mining area case study in Jilinbaolige, Inner Mongolia, China.
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Han, Shili, Wang, Sheng, Tang, Zhenping, Tan, Kaixuan, Duan, Xianzhe, He, Haiyang, Feng, Zhigang, and Xie, Yanshi
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- *
GEOPHYSICAL prospecting , *METALLOGENY , *MINES & mineral resources , *PROSPECTING , *ROCKS - Abstract
The Jilinbaolige polymetallic deposit, located in the Dong Ujimqin Banner in Inner Mongolia, China, belongs to the Daxinganling and Nangebi-Dongwu Banner polymetallic metallogenic belts. In recent years, many medium to large Ag-Pb-Zn deposits have been discovered, but due to their deep burial and the Quaternary soils cover, mineral exploration is difficult. In order to investigate the relationship among the mineralization, rock body and tectonic structures in the study region, we implemented 5.57 km2 magnetic exploration and four audio-magnetotelluric survey lines with 184 exploration points. Through comprehensive geophysical and geological inference and interpretation, we identified two types of granite which were formed at different stages in the early Yanshanian period, and inferred the NNE F4, NW F5 and NW F6 faults as the ore-conducting and ore-hosting structures of the Ag-Pb-Zn deposits. We determined that the faults' intersections provide the main metallogenic spaces while also locating concealed rock bodies interspersed as small stocks or veins within the upper Devonian Anguinwula formation. Apparently the Ag-Pb-Zn deposits are closely related to subsequently intrusive monzonitic granites of the early Yanshanian period. As confirmed by drilling, many Ag-Pb-Zn ore veins are found at 550–600 m depths and monzonitic granite porphyries at 750 m depth. Our geophysical exploration results reveal the coupling relationship between the concealed rock bodies and metallogenic structures, which can provide direction and effective geophysical methods to prospect for potentially similar deposits in the surrounding area. • Comprehensive geophysical and geological methods were used to investigate metallogenic regularity. • Two types of Yanshanian granites, exhibiting strong and weak magnetism, have been detected. • Results show that Ag-Pb-Zn mineralization is closely related to strongly magnetic granite. • Coupling relationship was found between concealed a rock body and metallotectonics. • Methods for seeking analogous deposits in the study region are proposed. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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244. Macroeconomic Consequences of Alternative Reforms to the Health Insurance System in the U.S
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Zhigang Feng, University of Zurich, and Feng, Zhigang
- Subjects
Actuarial science ,Public economics ,business.industry ,jel:E62 ,Health insurance reform, Heterogeneous agent model, Welfare analysis ,Self-insurance ,jel:E21 ,General insurance ,jel:I10 ,10003 Department of Banking and Finance ,330 Economics ,Insurance policy ,Health care ,Economics ,Casualty insurance ,Health care reform ,Risk pool ,Medical Expenditure Panel Survey ,business - Abstract
This paper examines the macroeconomic and welfare implications of alternative re- forms to the U.S. health insurance system. In particular, I study the effect of the expansion of Medicare to the entire population, the expansion of Medicaid, an individ- ual mandate, the removal of the tax break to purchase group insurance and providing a refundable tax credit for insurance purchases. To do so, I develop a stochastic OLG model with heterogenous agents facing uncertain health shocks. In this model individ- uals make optimal labor supply, health insurance, and medical usage decisions. Since buying insurance is endogenous, my model captures how the reforms may affect the characteristics of the insured as well as health insurance premiums. I use the Medi- cal Expenditure Panel Survey to calibrate the model and succeed in closely matching the current pattern of health expenditure and insurance demand as observed in the data. Numerical simulations indicate that reforming the health insurance system has a quantitatively relevant impact on the number of uninsured, hours worked, and welfare.
- Published
- 2009
245. Effective Components and Molecular Mechanism of Biejiaruangan Capsule Against Liver Fibrosis: High-resolution Mass Spectrometry, Network Pharmacological Analysis and Experimental Verification.
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Cao K, Jiang H, Zhang L, Fan C, Feng Z, Li B, Song L, and Zhang Q
- Abstract
Background: Biejiaruangan capsule (BJRGC) is a commonly used traditional Chinese medicine preparation for treating oftreating liver fibrosis (LF), but its specific molecular mechanism is unclear. This study used mass spectrometry, network pharmacology and experimental verification to explore the mechanism of BJRGC against LF., Methods: Ultrahigh-performance liquid chromatography-quadrupole-exactive-orbitrap-mass spectrometry (UHPLC-Q-Exactive-Orbitrap-MS) and network pharmacology were employed to identify and screen the potential components, targets, and signaling pathways of BJRGC against LF. The interaction between the active ingredients and targets was validated using molecular docking. Finally, 5-ethynyl-2'-deoxyuridine (EDU) staining, western blotting (WB), and flow cytometry (FCM) were utilized to further verify the mechanism of BJRGC against LF., Results: A total of 9 prototype components of BJRGC were identified in serum, most derived from iridoid glycosides and triterpenes in Gardenia jasminoides Ellis and Artemisia scoparia Waldst.et Kit. Network pharmacology predicts that medicine prototype components in serum mostly influence targets such as CDK2, CDK6, and PIK3CG, with the key route being the PI3K/AKT signaling pathway. Molecular docking showed that the major components have good binding properties with key target proteins. The experimental results showed that BJRGC could inhibit the proliferation of HSCs, induce cell cycle arrest and reduce the protein expression of CDK2, CDK6 and PIK3CG., Conclusions: BJRGC can inhibit the proliferation of HSCs by targeting the protein expression of CDK2, CDK6, and PIK3CG in the PI3K/AKT signaling pathway through its prototype components, such as hyperoside, tumulosic acid, and hederagenin, thereby alleviating LF disease., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2024
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246. RGS19 activates the MYH9/β-catenin/c-Myc positive feedback loop in hepatocellular carcinoma.
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Ke S, Lu S, Xu Y, Bai M, Yu H, Yin B, Wang C, Feng Z, Li Z, Huang J, Li X, Qian B, Hua Y, Fu Y, Sun B, Wu Y, and Ma Y
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- Animals, Female, Humans, Male, Mice, Cell Line, Tumor, Cell Proliferation, Feedback, Physiological, Prognosis, Signal Transduction, beta Catenin metabolism, Carcinoma, Hepatocellular metabolism, Carcinoma, Hepatocellular pathology, Carcinoma, Hepatocellular genetics, Gene Expression Regulation, Neoplastic, Liver Neoplasms metabolism, Liver Neoplasms pathology, Liver Neoplasms genetics, Myosin Heavy Chains metabolism, Myosin Heavy Chains genetics, Proto-Oncogene Proteins c-myc metabolism, Proto-Oncogene Proteins c-myc genetics, RGS Proteins metabolism, RGS Proteins genetics
- Abstract
Hepatocellular carcinoma (HCC) is one of the most common fatal cancers worldwide, and the identification of novel treatment targets and prognostic biomarkers is urgently needed because of its unsatisfactory prognosis. Regulator of G-protein signaling 19 (RGS19) is a multifunctional protein that regulates the progression of various cancers. However, the specific function of RGS19 in HCC remains unclear. The expression of RGS19 was determined in clinical HCC samples. Functional and molecular biology experiments involving RGS19 were performed to explore the potential mechanisms of RGS19 in HCC. The results showed that the expression of RGS19 is upregulated in HCC tissues and is significantly associated with poor prognosis in HCC patients. RGS19 promotes the proliferation and metastasis of HCC cells in vitro and in vivo. Mechanistically, RGS19, via its RGS domain, stabilizes the MYH9 protein by directly inhibiting the interaction of MYH9 with STUB1, which has been identified as an E3 ligase of MYH9. Moreover, RGS19 activates β-catenin/c-Myc signaling via MYH9, and RGS19 is also a transcriptional target gene of c-Myc. A positive feedback loop formed by RGS19, MYH9, and the β-catenin/c-Myc axis was found in HCC. In conclusion, our research revealed that competition between RGS19 and STUB1 is a critical mechanism of MYH9 regulation and that the RGS19/MYH9/β-catenin/c-Myc feedback loop may represent a promising strategy for HCC therapy., (© 2024. The Author(s).)
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- 2024
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247. IRG1 restrains M2 macrophage polarization and suppresses intrahepatic cholangiocarcinoma progression via the CCL18/STAT3 pathway.
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Zhou M, Yu H, Bai M, Lu S, Wang C, Ke S, Huang J, Li Z, Xu Y, Yin B, Li X, Feng Z, Fu Y, Jiang H, and Ma Y
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- Humans, Macrophages metabolism, Prognosis, Bile Ducts, Intrahepatic metabolism, Cell Line, Tumor, Tumor Microenvironment, Chemokines, CC metabolism, STAT3 Transcription Factor metabolism, Cholangiocarcinoma pathology, Bile Duct Neoplasms pathology
- Abstract
Intrahepatic cholangiocarcinoma (ICC) is a highly malignant and aggressive cancer whose incidence and mortality continue to increase, whereas its prognosis remains dismal. Tumor-associated macrophages (TAMs) promote malignant progression and immune microenvironment remodeling through direct contact and secreted mediators. Targeting TAMs has emerged as a promising strategy for ICC treatment. Here, we revealed the potential regulatory function of immune responsive gene 1 (IRG1) in macrophage polarization. We found that IRG1 expression remained at a low level in M2 macrophages. IRG1 overexpression can restrain macrophages from polarizing to the M2 type, which results in inhibition of the proliferation, invasion, and migration of ICC, whereas IRG1 knockdown exerts the opposite effects. Mechanistically, IRG1 inhibited the tumor-promoting chemokine CCL18 and thus suppressed ICC progression by regulating STAT3 phosphorylation. The intervention of IRG1 expression in TAMs may serve as a potential therapeutic target for delaying ICC progression., (© 2024 The Authors. Cancer Science published by John Wiley & Sons Australia, Ltd on behalf of Japanese Cancer Association.)
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- 2024
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248. Comprehensive analysis of transcriptome-wide M 6 A methylation for hepatic ischaemia reperfusion injury in mice.
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Hua Y, Li X, Yin B, Huang J, Lu S, Wang C, Ke S, Xu Y, Qian B, Feng Z, Yu H, and Ma Y
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- Animals, Mice, DNA Methylation, Protein Processing, Post-Translational, 3' Untranslated Regions, RNA, Messenger genetics, Transcriptome, Reperfusion Injury genetics
- Abstract
N6-Methyladenosine (m
6 A) plays key roles in the regulation of biological functions and cellular mechanisms for ischaemia reperfusion (IR) injury in different organs. However, little is known about the underlying mechanisms of m6 A-modified mRNAs in hepatic IR injury. In mouse models, liver samples were subjected to methylated RNA immunoprecipitation with high-throughput sequencing (MeRIP-seq) and RNA sequencing (RNA-seq). In total, 16917 m6 A peaks associated with 4098 genes were detected in the sham group, whereas 21,557 m6 A peaks associated with 5322 genes were detected in the IR group. There were 909 differentially expressed m6 A peaks, 863 differentially methylated transcripts and 516 differentially m6 A modification genes determined in both groups. The distribution of m6 A peaks was especially enriched in the coding sequence and 3'UTR. Furthermore, we identified a relationship between differentially m6 A methylated genes (fold change≥1.5/≤ 0.667, p value≤0.05) and differentially expressed genes (fold change≥1.5 and p value≤0.05) to obtain three overlapping predicted target genes (Fnip2, Phldb2, and Pcf11). Our study revealed a transcriptome-wide map of m6 A mRNAs in hepatic IR injury and might provide a theoretical basis for future research in terms of molecular mechanisms.- Published
- 2023
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249. TMEM147 aggravates the progression of HCC by modulating cholesterol homeostasis, suppressing ferroptosis, and promoting the M2 polarization of tumor-associated macrophages.
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Huang J, Pan H, Sun J, Wu J, Xuan Q, Wang J, Ke S, Lu S, Li Z, Feng Z, Hua Y, Yu Q, Yin B, Qian B, Zhou M, Xu Y, Bai M, Zhang Y, Wu Y, Ma Y, Jiang H, and Dai W
- Subjects
- Humans, Tumor-Associated Macrophages metabolism, Cell Line, Tumor, Lipid Metabolism, Tumor Microenvironment, Carcinoma, Hepatocellular pathology, Liver Neoplasms pathology, Ferroptosis
- Abstract
Background: The endoplasmic reticulum (ER) regulates critical processes, including lipid synthesis, which are affected by transmembrane proteins localized in the ER membrane. One such protein, transmembrane protein 147 (TMEM147), has recently been implicated for its role in hepatocellular carcinoma (HCC) tumorigenesis; however, the mechanisms remain unclear. We investigated the role of TMEM147 in HCC and the underlying mechanisms., Methods: TMEM147 expression was examined in human HCC cells and adjacent non-tumorous tissues using quantitative reverse transcription-polymerase chain reaction, western blotting, and immunohistochemistry. In vitro and in vivo studies were conducted to investigate the impact of TMEM147 on the progression of HCC. Proteins interacting with TMEM147 were identified via RNA-seq, immunoprecipitation, and mass spectrometry analyses. Lipidomic analysis and enzyme-linked immunosorbent assay (ELISA) were employed to determine and analyze cholesterol and 27-hydroxycholesterol (27HC) contents. Extensive experimental techniques were used to study ferroptosis in HCC cells. The fatty acid content of macrophages affected by TMEM147 was quantified using ELISA. Macrophage phenotypes were determined using immunofluorescence assay and flow cytometric analysis., Results: TMEM147 mRNA and protein levels were increased in HCC cells, and the increased TMEM147 expression was associated with a poor survival. TMEM147 promoted tumor cell proliferation and metastases in vitro and in vivo. The protein was found to interact with the key enzyme 7-dehydrocholesterol reductase (DHCR7), which affected cellular cholesterol homeostasis and increased the extracellular levels of 27HC in HCC cells. TMEM147 also promoted the expression of DHCR7 by enhancing the activity of signal transducer and activator of transcription 2. 27HC expression upregulated glutathione peroxidase 4 in HCC, leading to ferroptosis resistance and promotion of HCC proliferation. HCC cell-derived 27HC expression increased the lipid metabolism in macrophages and activated peroxisome proliferator-activated receptor-γ signaling, thereby activating M2 macrophage polarization and promoting HCC cell invasion and migration., Conclusions: Our results indicate that TMEM147 confers ferroptosis resistance and M2 macrophage polarization, which are primarily dependent on the upregulation of cellular cholesterol homeostasis and 27HC secretion, leading to cancer growth and metastasis. These findings suggest that the TMEM147/STAT2/DHCR7/27HC axis in the tumor microenvironment may serve as a promising therapeutic target for HCC., (© 2023. The Author(s).)
- Published
- 2023
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250. RNF125 attenuates hepatocellular carcinoma progression by downregulating SRSF1-ERK pathway.
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Feng Z, Ke S, Wang C, Lu S, Xu Y, Yu H, Li Z, Yin B, Li X, Hua Y, Qian B, Bai M, Fu Y, Zhang Y, Wu Y, and Ma Y
- Subjects
- Humans, MAP Kinase Signaling System, Cell Line, Tumor, Signal Transduction, Cell Proliferation genetics, Gene Expression Regulation, Neoplastic, Cell Movement genetics, Serine-Arginine Splicing Factors genetics, Carcinoma, Hepatocellular pathology, Liver Neoplasms pathology, MicroRNAs genetics
- Abstract
Hepatocellular carcinoma (HCC) is one of the most deadly malignant cancers worldwide. Research into the crucial genes responsible for maintaining the aggressive behaviour of cancer cells is important for the clinical treatment of HCC. The purpose of this study was to determine whether the E3 ubiquitin ligase Ring Finger Protein 125 (RNF125) plays a role in the proliferation and metastasis of HCC. RNF125 expression in human HCC samples and cell lines was investigated using TCGA dataset mining, qRT‒PCR, western blot, and immunohistochemistry assays. In addition, 80 patients with HCC were studied for the clinical value of RNF125. Furthermore, the molecular mechanism by which RNF125 contributes to hepatocellular carcinoma progression was determined with mass spectrometry (MS), coimmunoprecipitation (Co-IP), dual-luciferase reporter assays, and ubiquitin ladder assays. We found that RNF125 was markedly downregulated in HCC tumour tissues, which was associated with a poor prognosis for patients with HCC. Moreover, the overexpression of RNF125 inhibited HCC proliferation and metastasis both in vitro and in vivo, whereas the knockdown of RNF125 exerted antithetical effects. Mechanistically, mass spectrometry analysis revealed a protein interaction between RNF125 and SRSF1, and RNF125 accelerated the proteasome-mediated degradation of SRSF1, which impeded HCC progression by inhibiting the ERK signalling pathway. Furthermore, RNF125 was detected to be the downstream target of miR-103a-3p. In this study, we identified that RNF125 is a tumour suppressor in HCC and inhibits HCC progression by inhibiting the SRSF1/ERK pathway. These findings provide a promising treatment target for HCC., (© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)
- Published
- 2023
- Full Text
- View/download PDF
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