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RISS 인기검색어
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- 저자 : Xiaozhou Du (검색결과 3 건)
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Engineering Bifunctional Antibodies with Constant Region Fusion Architectures
Du, Juanjuan,Cao, Yu,Liu, Yan,Wang, Ying,Zhang, Yong,Fu, Guangsen,Zhang, Yuhan,Lu, Lucy,Luo, Xiaozhou,Kim, Chan Hyuk,Schultz, Peter G.,Wang, Feng American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.51
<P>We report a method to generate bifunctional antibodies by grafting full-length proteins into constant region loops of a full-length antibody or an antigen-binding fragment (Fab). The fusion proteins retain the antigen binding activity of the parent antibody but have an additional activity associated with the protein insert. The engineered antibodies have excellent <I>in vitro</I> activity, physiochemical properties, and stability. Among these, a Her2 × CD3 bispecific antibody (BsAb) was constructed by inserting an anti-Her2 single-chain variable fragment (ScFv) into an anti-CD3 Fab. This bispecific antibody efficiently induces targeted cell lysis in the presence of effector cells at as low as sub-picomolar concentrations <I>in vitro</I>. Moreover, the Her2 × CD3 BsAb shows potent <I>in vivo</I> antitumor activity in mouse Her2<SUP>2+</SUP> and Her2<SUP>1+</SUP> xenograft models. These results demonstrate that insertion of a full-length protein into non-CDR loops of antibodies provides a feasible approach to generate multifunctional antibodies for therapeutic applications.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2017/jacsat.2017.139.issue-51/jacs.7b09641/production/images/medium/ja-2017-09641x_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja7b09641'>ACS Electronic Supporting Info</A></P>
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Quasi-Fixed-Frequency Hysteresis Current Tracking Control Strategy for Modular Multilevel Converters
Jun Mei,Yu Ji,Xiaozhou Du,Tian Ma,Can Huang,Qinran Hu 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.6
This study proposes a quasi-fixed-frequency hysteresis current tracking control strategy for modular multilevel converters (MMCs) on the basis of voltage partition principle. First, by monitoring the grid voltage and the deviation between the output and reference currents, the output voltage is determined, thus prompting the output current to quickly and efficiently track the given current. Second, the voltages of the upper/lower capacitor of the arm and the voltages between the upper and lower arms are balanced by combining these arms with virtual loop mapping and arm voltage balance control, respectively. In particular, the proposed method is designed for any level and number of sub-modules. The validity of the proposed method is verified by simulations and experimental results of a five-level MMC prototype.
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Quasi-Fixed-Frequency Hysteresis Current Tracking Control Strategy for Modular Multilevel Converters
Mei, Jun,Ji, Yu,Du, Xiaozhou,Ma, Tian,Huang, Can,Hu, Qinran The Korean Institute of Power Electronics 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.6
This study proposes a quasi-fixed-frequency hysteresis current tracking control strategy for modular multilevel converters (MMCs) on the basis of voltage partition principle. First, by monitoring the grid voltage and the deviation between the output and reference currents, the output voltage is determined, thus prompting the output current to quickly and efficiently track the given current. Second, the voltages of the upper/lower capacitor of the arm and the voltages between the upper and lower arms are balanced by combining these arms with virtual loop mapping and arm voltage balance control, respectively. In particular, the proposed method is designed for any level and number of sub-modules. The validity of the proposed method is verified by simulations and experimental results of a five-level MMC prototype.
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