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Genes & Diseases 2024年第1期11卷 19-22页

作者： Zhenhai Li Wenchao Xu Feng Chen Jun Zhang wei-guo zhu Guangdong Key Laboratory of Genome Instability and Human Disease Prevention Department of Biochemistry and Molecular BiologyShenzhen University School of MedicineShenzhenGuangdong 518055China School of Pharmaceutical Sciences Shenzhen University Health Science CenterShenzhenGuangdong 518055China Base for International Science and Technology Cooperation:Carson Cancer Stem Cell Vaccines R&D Center International Cancer CenterShenzhen University Health Science CenterShenzhenGuangdong 518055China Shenzhen Bay Laboratory Shenzhen University School of MedicineShenzhenGuangdong 518055China Marshall Laboratory of Biomedical Engineering Shenzhen University School of MedicineShenzhenGuangdong 518055China

Etoposide is widely used for cancer chemotherapy in the ***,long-term etoposide treatment can lead to adverse effects or drug *** improve the situation,we evaluated the therapeutic efficiency of etoposide combined with inhibitors of bromodomain and extraterminal(BET)family proteins,which have recently emerged as novel anti-cancer targets due to their critical roles in cancer ***,we showed BRD4,one of the main targets of BET inhibitors,was involved in DNA damage response(DDR)via the homologous recombination(HR)repair pathway.

关键词： etoposide damage cancer

Regulation of p53 acetylation

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Science China(Life Sciences) 2017年第3期60卷 321-323页

作者： wei-guo zhu Department of Biochemistry and Molecular Biology Peking University School of Medical SciencesBeijing 100871China Department of medicine Shenzhen UniversityShenzhen 518060China

As a＂genomic guardian＂,the tumor suppressor p53 plays key roles in maintaining homeostasis under physiological conditions and defending against tumorigenesis upon cellular exposure to internal or external stresses.

关键词： p53 乙酰化肿瘤抑制基因抗肿瘤作用体内平衡生理条件基因组细胞

Bifurcation and chaos of a 4-side fixed rectangular thin plate in electromagnetic and mechanical fields

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第1期10卷 62-71页

作者： wei-guo zhu Xiang-zhong BAI School of Civil Engineering and Mechanics Yanshan University Qinhuangdao 066004 China Department of Transportation Engineering Huaiyin Institute of Technology Huai 'an 223001 China

We studied the problem of bifurcation and chaos in a 4-side fixed rectangular thin plate in electromagnetic and me-chanical *** on the basic nonlinear electro-magneto-elastic motion equations for a rectangular thin plate and the ex-pressions of electromagnetic forces,the vibration equations are derived for the mechanical loading in a steady transverse magnetic *** the Melnikov function method,the criteria are obtained for chaos motion to exist as demonstrated by the Smale horseshoe *** vibration equations are solved numerically by a fourth-order Runge-Kutta *** bifurcation dia-gram,Lyapunov exponent diagram,displacement wave diagram,phase diagram and Poincare section diagram are obtained.

关键词： Rectangular thin plate Electromagnetic-mechanical coupling Melnikov function method Runge-Kutta method Bifurcation Chaos

Characteristic Parameters for Dendritic Microstructure of Solidification During Slab Continuous Casting

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Journal of Iron and Steel Research International 2009年第1期16卷 17-21页

作者： guo wei zhu Miao-yong School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China

The operating conditions during the continuous casting process have a great effect on the microstructure of slab solidification, including primary and secondary dendritic arm spacing. On the basis of the analysis of available work, a revised expression for describing secondary dendritic arm spacing during solidification of slab continuous casting was presented, and the relation between the ratio of primary dendritic arm spacing to secondary dendritic arm spacing and the cooling rate was obtained.

关键词： slab continuous casting dendritic solidification microstructure dendritic arm spacing

Spin-Dependent Electron Properties of a Triple-Terminal Quantum Dot Structure

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Communications in Theoretical Physics 2009年第12期52卷 1117-1124页

作者： HAN Yu GONG wei-Jiang wei guo-zhu Department of Physics Liaoning University Shenyang 110036 China College of Sciences Northeastern University Shenyang 110004 China International Center for Material Physics Acadmia Sinica Shenyang 110015 China

Electron transport properties of a triple-terminal Aharonov-Bohm interferometer are theoretically *** applying a Rashba spin-orbit coupling to a quantum dot locally, we find that remarkable spin polarization comesabout in the electron transport process with tuning the structure parameters, i.e., the magnetic flux or quantum dotlevels. When the quantum dot levels are aligned with the Fermi level, there only appear spin polarization in thisstructure by the presence of an appropriate magnetic flux. However, in absence of magnetic flux spin polarization andspin separation can be simultaneously realized with the adjustment of quantum dot levels, namely, an incident electronfrom one terminal can select a specific terminal to depart from the quantum dots according to its spin state.

关键词： quantum dot electron transport Rashba interaction

Mean-Field Studies of a Mixed Spin-3/2 and Spin-2 and a Mixed Spin-3/2 and Spin-5/2 Ising System with Different Anisotropies

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Communications in Theoretical Physics 2009年第4期51卷 756-760页

作者： wei guo-zhu MIAO Hai-Ling College of Sciences Northeastern University Shenyang 110004 China International Center for Material Physics Academia Sinica Shenyang 110015 China

The magnetic properties of a mixed spin-3/2 and spin-2 and a mixed spin-3/2 and spin-5/2 Ising ferromag- netic system with different anisotropies are studied by means of mean-field theory （MFT）. The dependence of the phase diagram on single-ion anisotropy strengths is studied too. In the mixed spin-3/2 and spin-2 Ising model, besides the second-order phase transition, the first order-disorder phase transition and the tricritical line are found. In the mixed spin-3/2 and spin-5/2 Ising model, there is no first-order transition and trieritical line.

关键词： mixed spin Ising system mean-field theory phase transition

Effective-Field Theory for Kinetic Ising Model on Honeycomb Lattice

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Communications in Theoretical Physics 2009年第5期51卷 927-930页

作者： SHI Xiao-Ling wei guo-zhu College of Sciences Liaoning University of Petroleum and Chemical Technology Fushun 113001 China College of Sciences Northeastern University Shenyang 110004 China International Center for Material Physics Academia Sinica Shenyang 110015 China

As an analytical method, the effective-field theory （EFT） is used to study the dynamical response of the kinetic Ising model in the presence of a sinusoidal oscillating field. The effective-field equations of motion of the average magnetization are given for the honeycomb lattice （Z = 3）. The Liapunov exponent A is calculated for discussing the stability of the magnetization and it is used to determine the phase boundary. In the field amplitude ho / ZJ-temperature T/ZJ plane, the phase boundary separating the dynamic ordered and the disordered phase has been drawn. In contrast to previous analytical results that predicted a tricritical point separating a dynamic phase boundary line of continuous and discontinuous transitions, we find that the transition is always continuous. There is inconsistency between our results and previous analytical results, because they do not introduce sufficiently strong fluctuations.

关键词： kinetic Ising model effective-field theory phase transition

Stark Effect Dependence on Hydrogenic Impurities in GaAs Parabolic Quantum-Well Wires

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Communications in Theoretical Physics 2009年第11期52卷 953-959页

作者： WANG Sheng wei guo-zhu HAN Yu College of Electronic Science Daqing Petroleum Institute Daqing 163318 China College of Sciences Northeastern University Shenyang 110004 China International Center for Material Physics Academia Sinica Shenyang 110015 China

The ground-state and lowest excited-state binding energies of a hydrogenic impurity in GaAs parabolic quantum-well wires （Q WWs） subjected to external electric and magnetic fields are investigated using the finite-difference method within the quasi-one-dimensional effective potential model. We define an effective radius Pen of a cylindrical QWW, which can describe the strength of the lateral confinement. For the ground state, the position of the largest probability density of electron in x-y plane is located at a point, while for the lowest excited state, is located on a circularity whose radius is Pen. The point and circularity are pushed along the left haft of the center axis of the quantum-well wire by the electric field dire ted along the right half. When an impurity is located at the point or within the circularity, the ground-state or lowest excited-state binding energies are the largest; when the impurity is apart from the point or circularity, the ground-state or lowest excited-state binding energies start to decrease.

关键词： hydrogenic impurity quantum-well wire magnetic field binding energy

Histone modifications in DNA damage response

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Science China(Life Sciences) 2016年第3期59卷 257-270页

作者： Lin-Lin Cao Changchun Shen wei-guo zhu Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education) State Key Laboratory of Natural and BiomimeticDrugs Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function Department of Biochemistry and Molecular Biology Peking University Health Science Center Beijing 100191 China Peking University-Tsinghua University Joint Center for Life Sciences Beijing 100084 China Shenzhen University School of Medicine Shenzhen 518060 China Department of Clinical Laboratory Peking University People's Hospital Beijing 100044 China

DNA damage is a relatively common event in eukaryotic cell and may lead to genetic mutation and even cancer. DNA damage induces cellular responses that enable the cell either to repair the damaged DNA or cope with the damage in an appropriate way. Histone proteins are also the fundamental building blocks of eukaryotic chromatin besides DNA, and many types of post-translational modifications often occur on tails of histones. Although the function of these modifications has remained elusive, there is ever-growing studies suggest that histone modifications play vital roles in several chromatin-based processes, such as DNA damage response. In this review, we will discuss the main histone modifications, and their functions in DNA damage response.

关键词： DNA damage response histone modifications chromatin DNA repair

Phase Diagram of Transverse Spin-2 Ising Model with Longitudinal Crystal Field

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Communications in Theoretical Physics 2009年第7期52卷 163-167页

作者： ZHAO Jie XU Xing-Guang wei guo-zhu School of Science Liaoning Sbihua University Fushun 113001 China School of Science Northeastern University Shengyang 110006 China

The transverse spin-2 Ising ferromagnetic model with a longitudinal crystal field is studied within themean-field *** phase diagrams and magnetization curves are obtained by diagonalizing the Hamiltonian H_i ofthe Ising system numerically,and the first order-order phase transitions,the first order-disorder phase transitions,andthe second-order phase transitions are discussed in *** phenomena occur when the value of the transversefield is not zero and the reentrant diagram is given.

关键词： transverse spin-2 Ising model phase diagram first order-order phase transition reentrant phenomenon