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He L, Shen B, Ren Y, Mao H, Yin J, Dai W, Zhao S, Yang H. Hydroxyethylcellulose-Directed Synthesis of Gold Microplates with Hydrogen Peroxide in an Aqueous Phase. ACS OMEGA 2024; 9:8789-8796. [PMID: 38434829 PMCID: PMC10905594 DOI: 10.1021/acsomega.3c06039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 11/22/2023] [Accepted: 12/21/2023] [Indexed: 03/05/2024]
Abstract
In this study, we successfully synthesized well-defined polygonal gold microplates for the first time in an aqueous phase using hydroxyethylcellulose (HEC) in the presence of hydrogen peroxide (H2O2). HEC played a pivotal role during the synthesis, acting not only as a biotemplate but also as an in situ reduction site for the nucleation and growth of gold (Au) microplates. H2O2 played a crucial role in accelerating the growth of Au microplates from the Au nucleus. This methodology is ecofriendly and easy to operate and has potential applications in various fields, such as electronics, photonics, and biotechnology.
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Affiliation(s)
- Linlin He
- State
Key Laboratory of Advanced Technologies for Comprehensive Utilization
of Platinum Metals, Kunming Institute of
Precious Metals, Kunming 650106, People’s
Republic of China
| | - Bo Shen
- State
Key Laboratory of Advanced Technologies for Comprehensive Utilization
of Platinum Metals, Kunming Institute of
Precious Metals, Kunming 650106, People’s
Republic of China
| | - Yu Ren
- State
Key Laboratory of Advanced Technologies for Comprehensive Utilization
of Platinum Metals, Kunming Institute of
Precious Metals, Kunming 650106, People’s
Republic of China
- Yunnan
Precious Metal Laboratory Co. Ltd.,Kunming 650106,People’s Republic of China
| | - Huaming Mao
- State
Key Laboratory of Advanced Technologies for Comprehensive Utilization
of Platinum Metals, Kunming Institute of
Precious Metals, Kunming 650106, People’s
Republic of China
- Yunnan
Precious Metal Laboratory Co. Ltd.,Kunming 650106,People’s Republic of China
| | - Jungang Yin
- State
Key Laboratory of Advanced Technologies for Comprehensive Utilization
of Platinum Metals, Kunming Institute of
Precious Metals, Kunming 650106, People’s
Republic of China
- Yunnan
Precious Metal Laboratory Co. Ltd.,Kunming 650106,People’s Republic of China
| | - Wei Dai
- State
Key Laboratory of Advanced Technologies for Comprehensive Utilization
of Platinum Metals, Kunming Institute of
Precious Metals, Kunming 650106, People’s
Republic of China
- Yunnan
Precious Metal Laboratory Co. Ltd.,Kunming 650106,People’s Republic of China
| | - Shuanglong Zhao
- State
Key Laboratory of Advanced Technologies for Comprehensive Utilization
of Platinum Metals, Kunming Institute of
Precious Metals, Kunming 650106, People’s
Republic of China
- Yunnan
Precious Metal Laboratory Co. Ltd.,Kunming 650106,People’s Republic of China
| | - Hongwei Yang
- State
Key Laboratory of Advanced Technologies for Comprehensive Utilization
of Platinum Metals, Kunming Institute of
Precious Metals, Kunming 650106, People’s
Republic of China
- Yunnan
Precious Metal Laboratory Co. Ltd.,Kunming 650106,People’s Republic of China
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2
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Cao H, Dang Y, Zhang Z, Chen F, Liu J, Sun Q, Xie Y, Xu Z, Zhang W. Rational Design of Cu-Doped Tetrahedron of Spinel Oxide for High-Performance Nitric Oxide Electrochemical Sensor. ACS APPLIED MATERIALS & INTERFACES 2023; 15:23489-23500. [PMID: 37139799 DOI: 10.1021/acsami.3c03176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The real-time detection of nitric oxide (NO) in living cells is essential to reveal its physiological processes. However, the popular electrochemical detection strategy is limited to the utilization of noble metals. The development of new detection candidates without noble metal species still maintaining excellent catalytic performance has become a big challenge. Herein, we propose a spinel oxide doped with heteroatom-Cu-doped Co3O4 (Cu-Co3O4) for the sensitive and selective detection of NO release from the living cells. The material is strategically designed with Cu occupying the tetrahedral (Td) center of Co3O4 through the formation of a Cu-O bond. The introduced Cu regulates the local coordination environment and optimizes the electronic structure of Co3O4, hybridizing with the N 2p orbital to enhance charge transfer. The CuTd site can well inhibit the current response to nitrite (NO2-), resulting in a high improvement in the electrochemical oxidation of NO. The selectivity of Cu-Co3O4 can be markedly improved by the pore size of the molecular sieve and the negative charge on the surface. The rapid transmission of electrons is due to the fact that Cu-Co3O4 can be uniformly and densely in situ grown on Ti foil. The rationally designed Cu-Co3O4 sensor displays excellent catalytic activity toward NO oxidation with a low limit of detection of 2.0 nM (S/N = 3) and high sensitivity of 1.9 μA nM-1 cm-2 in cell culture medium. The Cu-Co3O4 sensor also shows good biocompatibility to monitor the real-time NO release from living cells (human umbilical vein endothelial cells: HUVECs; macrophage: RAW 264.7 cells). It was found that a remarkable response to NO was obtained in different living cells when stimulated by l-arginine (l-Arg). Moreover, the developed biosensor could be used for real-time monitoring of NO released from macrophages polarized to a M1/M2 phenotype. This cheap and convenient doping strategy shows universality and can be used for sensor design of other Cu-doped transition metal materials. The Cu-Co3O4 sensor presents an excellent example through the design of proper materials to implement unique sensing requirements and sheds light on the promising strategy for electrochemical sensor fabrication.
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Affiliation(s)
- Hongshuai Cao
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yijing Dang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Zhonghai Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Fengping Chen
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Jingyao Liu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Qian Sun
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yangchun Xie
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Zhiai Xu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Wen Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
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Sijben HJ, Dall’ Acqua L, Liu R, Jarret A, Christodoulaki E, Onstein S, Wolf G, Verburgt SJ, Le Dévédec SE, Wiedmer T, Superti-Furga G, IJzerman AP, Heitman LH. Impedance-Based Phenotypic Readout of Transporter Function: A Case for Glutamate Transporters. Front Pharmacol 2022; 13:872335. [PMID: 35677430 PMCID: PMC9169222 DOI: 10.3389/fphar.2022.872335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 03/29/2022] [Indexed: 11/18/2022] Open
Abstract
Excitatory amino acid transporters (EAAT/SLC1) mediate Na+-dependent uptake of extracellular glutamate and are potential drug targets for neurological disorders. Conventional methods to assess glutamate transport in vitro are based on radiolabels, fluorescent dyes or electrophysiology, which potentially compromise the cell’s physiology and are generally less suited for primary drug screens. Here, we describe a novel label-free method to assess human EAAT function in living cells, i.e., without the use of chemical modifications to the substrate or cellular environment. In adherent HEK293 cells overexpressing EAAT1, stimulation with glutamate or aspartate induced cell spreading, which was detected in real-time using an impedance-based biosensor. This change in cell morphology was prevented in the presence of the Na+/K+-ATPase inhibitor ouabain and EAAT inhibitors, which suggests the substrate-induced response was ion-dependent and transporter-specific. A mechanistic explanation for the phenotypic response was substantiated by actin cytoskeleton remodeling and changes in the intracellular levels of the osmolyte taurine, which suggests that the response involves cell swelling. In addition, substrate-induced cellular responses were observed for cells expressing other EAAT subtypes, as well as in a breast cancer cell line (MDA-MB-468) with endogenous EAAT1 expression. These findings allowed the development of a label-free high-throughput screening assay, which could be beneficial in early drug discovery for EAATs and holds potential for the study of other transport proteins that modulate cell shape.
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Affiliation(s)
- Hubert J. Sijben
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Laura Dall’ Acqua
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Rongfang Liu
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Abigail Jarret
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Medical University of Vienna, Vienna, Austria
| | - Eirini Christodoulaki
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Medical University of Vienna, Vienna, Austria
| | - Svenja Onstein
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Medical University of Vienna, Vienna, Austria
| | - Gernot Wolf
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Medical University of Vienna, Vienna, Austria
| | - Simone J. Verburgt
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Sylvia E. Le Dévédec
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Tabea Wiedmer
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Medical University of Vienna, Vienna, Austria
| | - Giulio Superti-Furga
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Medical University of Vienna, Vienna, Austria
| | - Adriaan P. IJzerman
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Laura H. Heitman
- Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
- Oncode Institute, Leiden, Netherlands
- *Correspondence: Laura H. Heitman,
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Zhang Y, Jiang W, Gu T, Han J, Lei B, Wang L, Liu H, Yin L, Chen B, Shi Y. Multidomain Oriented Particle Chains Based on Spatial Electric Field and Their Optical Application. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11546-11555. [PMID: 32933255 DOI: 10.1021/acs.langmuir.0c02021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The manipulation technology of particles is significant in drug screening, disease detection and treatment, etc. Here, we reported the multidomain oriented particle chains based on a spatial electric field and their optical application. According to the differences in the dielectric behavior of particles, the preparation of multidomain oriented particle chains in the gel was successfully realized by using the dielectrophoretic force and electroosmotic rotation. This provides a new idea for manufacturing multistructure, multilayer, and multifunctional intelligent response materials. In addition, the factors affecting the alignment height of the particles in the gel were discussed, which was the basis for the preparation of bilayer particle chains. As an example of structural hierarchy, particle assembly has broad application prospects in optoelectronic devices and soft robots.
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Affiliation(s)
- Yajun Zhang
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Weitao Jiang
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Tongkai Gu
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Jie Han
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Biao Lei
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Lanlan Wang
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Hongzhong Liu
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Lei Yin
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Bangdao Chen
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
| | - Yongsheng Shi
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710054, China
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5
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Song Y, Zhu P, Xu Z, Chen J. Dual-Responsive Dual-Drug-Loaded Bioinspired Polydopamine Nanospheres as an Efficient Therapeutic Nanoplatform against Drug-Resistant Cancer Cells. ACS APPLIED BIO MATERIALS 2020; 3:5730-5740. [DOI: 10.1021/acsabm.0c00512] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yiyan Song
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
- Department of Clinical laboratory, The Fifth People’s Hospital of Suzhou, Infectious Disease Hospital Affiliated to Soochow University, Suzhou 215000, China
| | - Ping Zhu
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Zhihui Xu
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Jin Chen
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
- Key Laboratory of Antibody Technique of National Health Commission, Nanjing Medical University, Nanjing 211166, China
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6
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Stefanowicz-Hajduk J, Ochocka JR. Real-time cell analysis system in cytotoxicity applications: Usefulness and comparison with tetrazolium salt assays. Toxicol Rep 2020; 7:335-344. [PMID: 32090021 PMCID: PMC7025972 DOI: 10.1016/j.toxrep.2020.02.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 01/31/2020] [Accepted: 02/06/2020] [Indexed: 01/08/2023] Open
Abstract
RTCA system allows to easily monitor cell adhesion and proliferation. The real-time impedance technique is widely used in many toxicological studies. RTCA results are generally comparable with results from tetrazolium salts assays. RTCA analysis should be limited when drugs with electroactive additives are tested. Tetrazolium salts assays should be avoided when colored compounds are studied.
Real-time cell analysis (RTCA) is a technique based on impedance and microsensor electrodes. RTCA system allows label-free, real-time, and continuous monitoring of cell adhesion, morphology, and rate of cell proliferation. The system offers a wide range of applications, mainly in toxicological studies, new drug screening, and microbiology. Here, we describe the usefulness of the system in different applications and compare this technology with conventional endpoint assays based on tetrazolium salts. We present advantages and disadvantages of the system and endpoint methods and their limitations in cytotoxicity investigations.
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Affiliation(s)
- Justyna Stefanowicz-Hajduk
- Department of Biology and Pharmaceutical Botany, Medical University of Gdańsk, Al. Hallera 107, 80-416, Gdańsk, Poland
| | - J Renata Ochocka
- Department of Biology and Pharmaceutical Botany, Medical University of Gdańsk, Al. Hallera 107, 80-416, Gdańsk, Poland
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7
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Cai L, Qin X, Xu Z, Song Y, Jiang H, Wu Y, Ruan H, Chen J. Comparison of Cytotoxicity Evaluation of Anticancer Drugs between Real-Time Cell Analysis and CCK-8 Method. ACS OMEGA 2019; 4:12036-12042. [PMID: 31460316 PMCID: PMC6682106 DOI: 10.1021/acsomega.9b01142] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 05/28/2019] [Indexed: 05/21/2023]
Abstract
Critical cytotoxicity evaluation of pharmaceuticals is necessary for the clinical practice of chemotherapy. To quantitatively evaluate cell viability, currently there are two main types of sensitive methods including real-time cell analysis (RTCA) and CCK-8 assay, in which RTCA records electrochemical signal changes around an incubated cell, whereas CCK-8 is based on the colorimetric method. Despite the different detection principles adopted for the cytotoxicity assessment, the comparison of the two methods in terms of the application scope is lacking. In this study, comparison studies were conducted between the RTCA and CCK-8 assays using anticancer drugs including doxorubicin hydrochloride, curcumin, irinotecan (CPT-11), taxol, and oxaliplatin, which are classified into two groups of drug molecules in the absence and presence of additives. The cytotoxicity evaluation of these drugs on cancer cells revealed that the physicochemical properties of drug formulations such as optical and electrochemical properties are closely linked with the readout of cytotoxic methods. The experimental results suggested that the preselection of cytotoxic assay is critical for the quantitative measurement of cytotoxicity of anticancer drugs, which is of clinical importance for their therapeutic usage.
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Affiliation(s)
- Ling Cai
- School
of Public Health and School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Xijiang Qin
- School
of Public Health and School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Zhihui Xu
- School
of Public Health and School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Yiyan Song
- School
of Public Health and School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Huijun Jiang
- School
of Public Health and School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Yuan Wu
- Department
of Medical Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of
Cancer Research, The Affiliated Cancer Hospital
of Nanjing Medical University, Nanjing 210009, China
| | - Hongjie Ruan
- Department
of Gynecology, Obstetrics and Gynecology
Hospital Affiliated to Nanjing Medical University, Nanjing 210004, China
| | - Jin Chen
- School
of Public Health and School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
- The Key Laboratory of Modern Toxicology,
Ministry of Education, School
of Public Health, and Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, China
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8
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Real-time cell analysis of the cytotoxicity of a pH-responsive drug-delivery matrix based on mesoporous silica materials functionalized with ferrocenecarboxylic acid. Anal Chim Acta 2019; 1051:138-146. [DOI: 10.1016/j.aca.2018.11.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/19/2018] [Accepted: 11/07/2018] [Indexed: 12/18/2022]
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9
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Xu Z, Song Y, Jiang H, Kong Y, Li X, Chen J, Wu Y. Regeneration of Arrayed Gold Microelectrodes Equipped for a Real-Time Cell Analyzer. J Vis Exp 2018. [PMID: 29578508 DOI: 10.3791/56250] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The label-free cell-based assay is advantageous for biochemical study because of it does not require the use of experimental animals. Due to its ability to provide more dynamic information about cells under physiological conditions than classical biochemical assays, this label-free real-time cell assay based on the electric impedance principle is attracting more attention during the past decade. However, its practical utilization may be limited due to the relatively expensive cost of measurement, in which costly consumable disposable gold microchips are used for the cell analyzer. In this protocol, we have developed a general strategy to regenerate arrayed gold microelectrodes equipped for a commercial label-free cell analyzer. The regeneration process includes trypsin digestion, rinsing with ethanol and water, and a spinning step. The proposed method has been tested and shown to be effective for the regeneration and repeated usage of commercial electronic plates at least three times, which will help researchers save on the high running cost of real-time cell assays.
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Affiliation(s)
- Zhihui Xu
- School of Public Health, Nanjing Medical University
| | - Yiyan Song
- School of Public Health, Nanjing Medical University
| | | | - Yan Kong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University
| | - Xiaoming Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University
| | - Jin Chen
- School of Public Health, Nanjing Medical University;
| | - Yuan Wu
- Department of Medical Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, The Affiliated Cancer Hospital of Nanjing Medical University;
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