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Khochare SD, Li X, Yang X, Shi Y, Feng G, Ruchhoeft P, Shih WC, Shan X. Functional Plasmonic Microscope: Characterizing the Metabolic Activity of Single Cells via Sub-nm Membrane Fluctuations. Anal Chem 2024; 96:5771-5780. [PMID: 38563229 DOI: 10.1021/acs.analchem.3c04301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Metabolic abnormalities are at the center of many diseases, and the capability to film and quantify the metabolic activities of a single cell is important for understanding the heterogeneities in these abnormalities. In this paper, a functional plasmonic microscope (FPM) is used to image and measure metabolic activities without fluorescent labels at a single-cell level. The FPM can accurately image and quantify the subnanometer membrane fluctuations with a spatial resolution of 0.5 μm in real time. These active cell membrane fluctuations are caused by metabolic activities across the cell membrane. A three-dimensional (3D) morphology of the bottom cell membrane was imaged and reconstructed with FPM to illustrate the capability of the microscope for cell membrane characterization. Then, the subnanometer cell membrane fluctuations of single cells were imaged and quantified with the FPM using HeLa cells. Cell metabolic heterogeneity is analyzed based on membrane fluctuations of each individual cell that is exposed to similar environmental conditions. In addition, we demonstrated that the FPM could be used to evaluate the therapeutic responses of metabolic inhibitors (glycolysis pathway inhibitor STF 31) on a single-cell level. The result showed that the metabolic activities significantly decrease over time, but the nature of this response varies, depicting cell heterogeneity. A low-concentration dose showed a reduced fluctuation frequency with consistent fluctuation amplitudes, while the high-concentration dose showcased a decreasing trend in both cases. These results have demonstrated the capabilities of the functional plasmonic microscope to measure and quantify metabolic activities for drug discovery.
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Affiliation(s)
- Suraj D Khochare
- Advanced Imaging and Sensing Lab, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
| | - Xiaoliang Li
- Advanced Imaging and Sensing Lab, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
| | - Xu Yang
- Advanced Imaging and Sensing Lab, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
| | - Yaping Shi
- Advanced Imaging and Sensing Lab, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
| | - Guangxia Feng
- Advanced Imaging and Sensing Lab, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
| | - Paul Ruchhoeft
- Advanced Imaging and Sensing Lab, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
| | - Wei-Chuan Shih
- Advanced Imaging and Sensing Lab, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
| | - Xiaonan Shan
- Advanced Imaging and Sensing Lab, Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States
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Li S, Wang Z, Li Z, Xie S, Shan X, Cai Z. Intraosseous schwannoma of the mandible: new case series, literature update, and proposal of a classification. Int J Oral Maxillofac Surg 2024; 53:205-211. [PMID: 37716827 DOI: 10.1016/j.ijom.2023.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 08/15/2023] [Accepted: 08/29/2023] [Indexed: 09/18/2023]
Abstract
Intraosseous schwannoma of the mandible is rare, with diagnostic and therapeutic challenges. The aims of this study were to report new cases of intraosseous schwannoma of the mandible and to propose a clinical classification, providing suggestions for treatment methods. The cases of 13 patients treated at the authors' hospital and 86 cases reported previously in the literature were reviewed. The most common clinical feature was facial swelling (60/93). The rate of cortical thinning or expansion was 44.8% (43/96); widening of the inferior alveolar nerve canal on radiographs was observed in 15 patients.
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Affiliation(s)
- S Li
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Haidian District, Beijing, PR China
| | - Z Wang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Haidian District, Beijing, PR China
| | - Z Li
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Haidian District, Beijing, PR China
| | - S Xie
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Haidian District, Beijing, PR China
| | - X Shan
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Haidian District, Beijing, PR China
| | - Z Cai
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Haidian District, Beijing, PR China.
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Feng G, Shi Y, Jia H, Risal S, Yang X, Ruchhoeft P, Shih WC, Fan Z, Xu W, Shan X. Progressive and instantaneous nature of lithium nucleation discovered by dynamic and operando imaging. Sci Adv 2023; 9:eadg6813. [PMID: 37224260 PMCID: PMC10208563 DOI: 10.1126/sciadv.adg6813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 04/17/2023] [Indexed: 05/26/2023]
Abstract
The understanding of lithium (Li) nucleation and growth is important to design better electrodes for high-performance batteries. However, the study of Li nucleation process is still limited because of the lack of imaging tools that can provide information of the entire dynamic process. We developed and used an operando reflection interference microscope (RIM) that enables real-time imaging and tracking the Li nucleation dynamics at a single nanoparticle level. This dynamic and operando imaging platform provides us with critical capabilities to continuously monitor and study the Li nucleation process. We find that the formation of initial Li nuclei is not at the exact same time point, and Li nucleation process shows the properties of both progressive and instantaneous nucleation. In addition, the RIM allows us to track the individual Li nucleus's growth and extract spatially resolved overpotential map. The nonuniform overpotential map indicates that the localized electrochemical environments substantially influence the Li nucleation.
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Affiliation(s)
- Guangxia Feng
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
| | - Yaping Shi
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
| | - Hao Jia
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Samprash Risal
- Department of Engineering Technology, University of Houston, Houston, TX 77204, USA
| | - Xu Yang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
| | - Paul Ruchhoeft
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
| | - Wei-Chuan Shih
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
| | - Zheng Fan
- Department of Engineering Technology, University of Houston, Houston, TX 77204, USA
| | - Wu Xu
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Xiaonan Shan
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
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Han J, Zhang J, Shan X, Peng H, Zhang Y, Qin L, Wang L. Tunable ultra-narrow linewidth diode laser for multiple metastable rare gas pumping. Opt Express 2023; 31:13065-13072. [PMID: 37157452 DOI: 10.1364/oe.484481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
We present what we believe to be a novel external cavity feedback structure based on a double-layer laser diode array with volume Bragg grating (VBG). Diode laser collimation and external cavity feedback result in a high-power and ultra-narrow linewidth diode laser pumping source with a central wavelength of 811.292 nm, spectral linewidth of 0.052 nm, and output power exceeding 100 W, with external cavity feedback and electro-optical conversion efficiencies exceeding 90% and 46%, respectively. The temperature of VBG is controlled to tune the central wavelength from 811.292 nm to 811.613 nm, covering the Kr* and Ar* absorption spectra. We believe this is the first report of an ultra-narrow linewidth diode laser that can pump two metastable rare gases.
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Feng G, Jia H, Shi Y, Yang X, Liang Y, Engelhard MH, Zhang Y, Yang C, Xu K, Yao Y, Xu W, Shan X. Imaging solid-electrolyte interphase dynamics using operando reflection interference microscopy. Nat Nanotechnol 2023:10.1038/s41565-023-01316-3. [PMID: 36759704 DOI: 10.1038/s41565-023-01316-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 01/03/2023] [Indexed: 06/18/2023]
Abstract
The quality of the solid-electrolyte interphase is crucial for the performance of most battery chemistries, but its formation dynamics during operation are not well understood due to a lack of reliable operando characterization techniques. Herein, we report a dynamic, non-invasive, operando reflection interference microscope to enable the real-time imaging of the solid-electrolyte interphase during its formation and evolution processes with high sensitivity. The stratified structure of the solid-electrolyte interphase formed during four distinct steps includes the emergence of a permanent inner inorganic layer enriched in LiF, a transient assembly of an interfacial electrified double layer and a consequent emergence of a temporary outer organic-rich layer whose presence is reversible with electrochemical cycling. Reflection interference microscope imaging reveals an inverse correlation between the thicknesses of two interphasial subcomponents, implying that the permanent inorganic-rich inner layer dictates the organic-rich outer layer formation and lithium nucleation. The real-time visualization of solid-electrolyte interphase dynamics provides a powerful tool for the rational design of battery interphases.
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Affiliation(s)
- Guangxia Feng
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
| | - Hao Jia
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Yaping Shi
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
| | - Xu Yang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
| | - Yanliang Liang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
| | - Mark H Engelhard
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Ye Zhang
- Materials Science and Engineering Program, University of Houston, Houston, TX, USA
| | - Chaojie Yang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
| | - Kang Xu
- Battery Science Branch, Energy Science Division, Sensor and Electron Devices Directorate, Army Research Laboratory, Adelphi, MD, USA.
| | - Yan Yao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA.
- Materials Science and Engineering Program, University of Houston, Houston, TX, USA.
- Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX, USA.
| | - Wu Xu
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
| | - Xiaonan Shan
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA.
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Tian H, Feng G, Wang Q, Li Z, Zhang W, Lucero M, Feng Z, Wang ZL, Zhang Y, Zhen C, Gu M, Shan X, Yang Y. Three-dimensional Zn-based alloys for dendrite-free aqueous Zn battery in dual-cation electrolytes. Nat Commun 2022; 13:7922. [PMID: 36564385 PMCID: PMC9789050 DOI: 10.1038/s41467-022-35618-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022] Open
Abstract
Aqueous zinc-ion batteries, in terms of integration with high safety, environmental benignity, and low cost, have attracted much attention for powering electronic devices and storage systems. However, the interface instability issues at the Zn anode caused by detrimental side reactions such as dendrite growth, hydrogen evolution, and metal corrosion at the solid (anode)/liquid (electrolyte) interface impede their practical applications in the fields requiring long-term performance persistence. Despite the rapid progress in suppressing the side reactions at the materials interface, the mechanism of ion storage and dendrite formation in practical aqueous zinc-ion batteries with dual-cation aqueous electrolytes is still unclear. Herein, we design an interface material consisting of forest-like three-dimensional zinc-copper alloy with engineered surfaces to explore the Zn plating/stripping mode in dual-cation electrolytes. The three-dimensional nanostructured surface of zinc-copper alloy is demonstrated to be in favor of effectively regulating the reaction kinetics of Zn plating/stripping processes. The developed interface materials suppress the dendrite growth on the anode surface towards high-performance persistent aqueous zinc-ion batteries in the aqueous electrolytes containing single and dual cations. This work remarkably enhances the fundamental understanding of dual-cation intercalation chemistry in aqueous electrochemical systems and provides a guide for exploring high-performance aqueous zinc-ion batteries and beyond.
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Affiliation(s)
- Huajun Tian
- grid.419897.a0000 0004 0369 313XKey Laboratory of Power Station Energy Transfer Conversion and System (North China Electric Power University), Ministry of Education, North China Electric Power University, Beijing, 102206 China ,grid.170430.10000 0001 2159 2859NanoScience Technology Center, University of Central Florida, Orlando, FL 32826 USA
| | - Guangxia Feng
- grid.266436.30000 0004 1569 9707Electrical and Computer Engineering Department, University of Houston, W306, Engineering Building 2, Houston, TX 77204 USA
| | - Qi Wang
- grid.263817.90000 0004 1773 1790Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Zhao Li
- grid.170430.10000 0001 2159 2859NanoScience Technology Center, University of Central Florida, Orlando, FL 32826 USA ,grid.170430.10000 0001 2159 2859Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32826 USA
| | - Wei Zhang
- grid.170430.10000 0001 2159 2859NanoScience Technology Center, University of Central Florida, Orlando, FL 32826 USA ,grid.170430.10000 0001 2159 2859Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32826 USA
| | - Marcos Lucero
- grid.4391.f0000 0001 2112 1969School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331 USA
| | - Zhenxing Feng
- grid.4391.f0000 0001 2112 1969School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331 USA
| | - Zi-Le Wang
- grid.419897.a0000 0004 0369 313XKey Laboratory of Power Station Energy Transfer Conversion and System (North China Electric Power University), Ministry of Education, North China Electric Power University, Beijing, 102206 China
| | - Yuning Zhang
- grid.419897.a0000 0004 0369 313XKey Laboratory of Power Station Energy Transfer Conversion and System (North China Electric Power University), Ministry of Education, North China Electric Power University, Beijing, 102206 China
| | - Cheng Zhen
- grid.263817.90000 0004 1773 1790Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Meng Gu
- grid.263817.90000 0004 1773 1790Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055 China
| | - Xiaonan Shan
- grid.266436.30000 0004 1569 9707Electrical and Computer Engineering Department, University of Houston, W306, Engineering Building 2, Houston, TX 77204 USA
| | - Yang Yang
- grid.170430.10000 0001 2159 2859NanoScience Technology Center, University of Central Florida, Orlando, FL 32826 USA ,grid.170430.10000 0001 2159 2859Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32826 USA ,grid.170430.10000 0001 2159 2859Renewable Energy and Chemical Transformation Cluster, University of Central Florida, Orlando, FL 32826 USA ,grid.170430.10000 0001 2159 2859Department of Chemistry, University of Central Florida, Orlando, FL 32826 USA ,grid.170430.10000 0001 2159 2859The Stephen W. Hawking Center for Microgravity Research and Education, University of Central Florida, Orlando, FL 32826 USA
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Shan X, Han D, Ge Y, Zhang H, Lu R. Clinical outcomes of keratinized mucosa augmentation in jaws reconstructed with fibula or iliac bone flaps. Int J Oral Maxillofac Surg 2021; 51:949-956. [PMID: 34924272 DOI: 10.1016/j.ijom.2021.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 08/25/2021] [Accepted: 11/23/2021] [Indexed: 10/19/2022]
Abstract
This prospective study was undertaken to evaluate the treatment outcomes of keratinized mucosa augmentation (KMA) on the buccal and palatal/lingual sides of implants in jaws reconstructed after oncological surgery. Forty-two implants in 12 patients whose jaws had been reconstructed with a fibula or iliac bone flap were included. KMA was performed at 3 months after implant placement; this included an apically displaced partial-thickness flap and a free gingival graft (FGG) around the implants to increase the keratinized mucosa width (KMW). Patients were followed up for at least 6 months post-surgery. KMW, shrinkage, and patient pain and discomfort measured on a visual analogue scale were analysed. A histological analysis was performed of tissue epithelium from two patients. The results showed that KMW was >2 mm on both the buccal and palatal/lingual sides during follow-up. Before surgery, histological analysis showed epithelium with no epithelial spikes; normal keratinized epithelial spikes were observed at 8 weeks after KMA. Greater KMW was observed around implants in reconstructed maxillae than around those in reconstructed mandibles (P < 0.001). Patients felt more pain at the donor site than at the recipient site during the first 3 days post-surgery. KMA with FGG was predictable in reconstructed jaws and may help maintain the long-term stability of implants.
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Affiliation(s)
- X Shan
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Clinical Research Centre for Oral Diseases and National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - D Han
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Y Ge
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - H Zhang
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - R Lu
- Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing, PR China.
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Liu J, Wang A, Trapani D, Sun X, Shan X, Al-Madani H, Safi M. 14P Identification of age-associated genes as prognostic factors in non-small cell lung cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.2010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Shi Y, Feng G, Li X, Yang X, Ghanim AH, Ruchhoeft P, Jackson D, Mubeen S, Shan X. Electrochemical Impedance Imaging on Conductive Surfaces. Anal Chem 2021; 93:12320-12328. [PMID: 34460223 DOI: 10.1021/acs.analchem.1c02040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electrochemical impedance spectroscopy (EIS) is a powerful tool to measure and quantify the system impedance. However, EIS only provides an average result from the entire electrode surface. Here, we demonstrated a reflection impedance microscope (RIM) that allows us to image and quantify the localized impedance on conductive surfaces. The RIM is based on the sensitive dependence between the materials' optical properties, such as permittivity, and their local surface charge densities. The localized charge density variations introduced by the impedance measurements will lead to optical reflectivity changes on electrode surfaces. Our experiments demonstrated that reflectivity modulations are linearly proportional to the surface charge density on the electrode and the measurements show good agreement with the simple free electron gas model. The localized impedance distribution was successfully extracted from the reflectivity measurements together with the Randles equivalent circuit model. In addition, RIM is used to quantify the impedance on different conductive surfaces, such as indium tin oxide, gold film, and stainless steel electrodes. A polydimethylsiloxane-patterned electrode surface was used to demonstrate the impedance imaging capability of RIM. In the end, a single-cell impedance imaging was obtained by RIM.
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Affiliation(s)
- Yaping Shi
- Department of Electrical & Computer Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States of America
| | - Guangxia Feng
- Department of Electrical & Computer Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States of America
| | - Xiaoliang Li
- Department of Electrical & Computer Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States of America
| | - Xu Yang
- Department of Electrical & Computer Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States of America
| | - Abdulsattar H Ghanim
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa 52242, United States of America
| | - Paul Ruchhoeft
- Department of Electrical & Computer Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States of America
| | - David Jackson
- Department of Electrical & Computer Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States of America
| | - Syed Mubeen
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa 52242, United States of America
| | - Xiaonan Shan
- Department of Electrical & Computer Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States of America
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Safi M, Al-Azab M, Shan X, Wang A, Jin C, Henan Q, Liu J. 1737P Prognosis of metastatic sites in heart-specific death of cancer patients. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Li X, Hou J, Shan X, Tian E, Wang Y, Xu W. P–257 An unknown cause lead to polyspermy in IVF cycles and 0PN zygotes in ICSI cycles in male patient. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
The patient sperm has normal morphology and motility, which paternal factors cause the abnormal fertilization in IVF/ICSI and what is the underlying mechanism?
Summary answer
A genetic mutation of BEX1 and decreased PLC-zeta has been found in patient, which may provide novel insights of polyspermy and pronucleus formation during fertilization.
What is known already
In mammals, pronucleus formation, a landmark event for fertilization, is critical for embryonic development. Abnormal fertilization refers to the abnormal number of pronucleus and polar bodies in zygotes during in vitro fertilization, with an incidence of 5–15%, among which the incidence of polyspermy and 0PN is about 2–10% and 30%. However, the mechanisms underlying pronucleus formation still unclear. More research has focused on oocyte activation, while paternal relevant abnormal fertilizations have been rarely established. The mechanism of how sperm and/or substances carried by sperm influence the physiological process of fertilization is also unclear.
Study design, size, duration
In our study, we first work on the preliminary observation and analysis of sperm morphology, structure and sperm chromosome number, and then made further analysis at the genetic level to find out the cause of this particular phenotype in this patient. We use of zone-free golden hamster ova test the fertilizing capacity and rescue the pronucleus formation with SrCl2.
Participants/materials, setting, methods
The patient, golden hamster, Papanicolaou stain, scanning electron microscope (SEM), Transmission Electron Microscope (TEM), Fluorescence in situ hybridization (FISH), Whole Exome Sequencing (WES), IVF, ICSI, Assisted Oocyte Activation (AOA).
Main results and the role of chance
During 2016–2018, they did 4 cycle assistant reproduction technology. Cycle1, conventional IVF(C-IVF), 9 MII oocytes, 9 3PN zygotes; Cycle2, ICSI, 10 MII oocytes, 10 0PN zygotes; Cycle3, donor-oocytes C-IVF, 6 MII oocytes, 6 3PN zygotes, and the donor did C-IVF get normal zygotes and embryos; Cycle4, donor-sperm C-IVF, 7 MII oocytes, 4 2PN zygotes, 3 useable embryos. Remarkably, clinical examination about male shows normal sperm semen parameters. Papanicolaou stain and SEM shows that the sperm of the patient has normal morphology. The TEM data shows that the spermatozoa with normal head morphology and intact 9 + 2 sperm flagella structure. In the sperm FISH analysis, Chromosome ploidy is haploid. We performed WES on the male, after exclusion of frequent variants and application of technical and biological filters, two homozygous missense mutations were identified in BEX1 (c.191G>A [p. W64X]), which has been few reports of male infertility. The western blot result show that the PLC-zeta was decreased in patient. After 10mM SrCl2 assisted oocyte activation, the zygote has the pronucleus formation in ICSI.
Limitations, reasons for caution
At present, we only observe sperm related factors (morphology, structure, chromosome number, genetic mutation). Next step is to detect the substances sperm carried (e.g. RNA-seq, proteomics). In this case, what is of great concern to us is the inconsistencies of the abnormal fertilization during the conventional IVF and ICSI cycles.
Wider implications of the findings: Many studies of fertilization mechanism, the main focus is on the maternal cytoplasmic factors, such as the Ca 2+ release initiate the fast block of oocytes. There are few reports about abnormal fertilization due to sperm factors. Our case may offer new insights for the study of fertilization.
Trial registration number
Not applicable
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Affiliation(s)
- X Li
- Sichuan university, Joint Laboratory of Reproductive Medicine- SCU-CUHK- Key Laboratory of Obstetric- Gynaecologic and Paediatric Diseases and Birth Defects of Ministry of Education- West China Second University Hospital-, chengdu, China
| | - J Hou
- Sichuan university, Joint Laboratory of Reproductive Medicine- SCU-CUHK- Key Laboratory of Obstetric- Gynaecologic and Paediatric Diseases and Birth Defects of Ministry of Education- West China Second University Hospital-, chengdu, China
| | - X Shan
- Chengdu University of Traditional Chinese Medicine, School of Medical and Life Sciences, Chengdu, China
| | - E Tian
- Maternity and Child Health Hospital of Jinjiang District, the Center of Reproductive Medicine, Chengdu, China
| | - Y Wang
- Sichuan university, Reproduction Medical Center of West China Second University Hospital- Key Laboratory of Obstetric- Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, chengdu, China
| | - W Xu
- Sichuan university, Joint Laboratory of Reproductive Medicine- SCU-CUHK- Key Laboratory of Obstetric- Gynaecologic and Paediatric Diseases and Birth Defects of Ministry of Education- West China Second University Hospital-, chengdu, China
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Safi M, Trapani D, Alradhi M, Al-Danakh A, Shan X, Ping F, Al-Masni A, Jamalat Y, Al-Sabai N, Al-Dhaibani A, Al-Samawi A, Al-Sameai M, Al-Sharabi A, Liu J. 170P Pattern and prognosis of fatal cardiac events in locoregional and distant stages in female breast cancer patients: SEER- based analysis. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.03.184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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13
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Safi M, Al-Radhi M, Kanesvaran R, Trapani D, Mazher S, Alnusaif M, Aldanakh A, Baldi S, Moeed Y, Al-Dubai H, Sun X, Shan X, Ameen M, Liu J. 195P Brain and heart in cancer patients: A population-based study. J Thorac Oncol 2021. [DOI: 10.1016/s1556-0864(21)02037-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Garcia A, Wang S, Tao N, Shan X, Wang Y. Plasmonic Imaging of Oxidation and Reduction of Single Gold Nanoparticles and Their Surface Structural Dynamics. ACS Sens 2021; 6:502-507. [PMID: 33373199 DOI: 10.1021/acssensors.0c02055] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Gold nanoparticles (AuNPs) have been widely used in catalytic electrochemistry. Heterogeneity in size, shape, and surface sites leads to variable, particle-specific catalytic activities. Conventional electrochemical methods can only obtain the collective responses from all the catalytic nanoparticles on the electrode surface; the heterogeneity of particle performance will be averaged. Alternatively, plasmonic electrochemical imaging (PECi) is capable of imaging the electrochemical activity at individual nanoparticles. In this work, PECi was used to image the oxidation and reduction of the gold surface at individual AuNPs, and their associated structural alterations were successfully measured. We have studied the electrochemical responses from gold nanocubes, gold nanorods, and gold nanowires with PECi and observed different surface redox activities. We have also demonstrated the capability of monitoring the surface dynamics at individual AuNPs utilizing characteristic PECi derived cyclic voltammograms (CVs).
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Affiliation(s)
- Adaly Garcia
- Department of Chemistry and Biochemistry, California State University, Los Angeles, 5151 State University Drive, Los Angeles, California 90032, United States
| | - Shaopeng Wang
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, 1001 South McAllister Avenue, Tempe, Arizona 85281, United States
| | - Nongjian Tao
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, 1001 South McAllister Avenue, Tempe, Arizona 85281, United States
| | - Xiaonan Shan
- Department of Electrical & Computer Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Yixian Wang
- Department of Chemistry and Biochemistry, California State University, Los Angeles, 5151 State University Drive, Los Angeles, California 90032, United States
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15
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Abstract
Many fundamentally important biological phenomena involve the cells to establish and break down the adhesive interactions with the substrate. Here, we report a novel optical method that could directly image the electrochemical impedance of cell-substrate interactions at the single cell level with conventional microscopes and cameras. A thin conductive polymer layer on top of the ITO substrate (poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate), PEDOT:PSS) is used as the impedance imaging and sensing layer. A sinusoidal electrochemical potential is applied to the conductive polymer film, and the ion intercalation and transportation in the PEDOT:PSS layer will change the absorption spectrum of the polymer film. The attachment of the cells to the substrate will block and affect the ion doping and dedoping process, and therefore change the color of the polymer film. This process can be captured by any upright or inverted microscope with a simple camera. Utilizing this method, we have successfully imaged the impedance of single-cell attachment, observed the variations of cell-substrate interactions, and measured the impedance changes at different stages of the attachment process. This paper has proposed and successfully demonstrated a new strategy that translates the electrochemical impedance information to an optical signal that could be imaged and used to quantify the local responses. In addition, this method does not need any specially designed optical setup, which may lead to its broad applications in the clinics and biological research laboratories.
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Affiliation(s)
- Xu Yang
- Department of Electrical & Computer Engineering, University of Houston 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Xiaoliang Li
- Department of Electrical & Computer Engineering, University of Houston 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Suraj D. Khochare
- Department of Electrical & Computer Engineering, University of Houston 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Paul Ruchhoeft
- Department of Electrical & Computer Engineering, University of Houston 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Wei-Chuan Shih
- Department of Electrical & Computer Engineering, University of Houston 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Xiaonan Shan
- Department of Electrical & Computer Engineering, University of Houston 4800 Calhoun Road, Houston, Texas 77004, United States
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16
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Tian H, Li Z, Feng G, Yang Z, Fox D, Wang M, Zhou H, Zhai L, Kushima A, Du Y, Feng Z, Shan X, Yang Y. Stable, high-performance, dendrite-free, seawater-based aqueous batteries. Nat Commun 2021; 12:237. [PMID: 33431888 PMCID: PMC7801520 DOI: 10.1038/s41467-020-20334-6] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 11/26/2020] [Indexed: 11/14/2022] Open
Abstract
Metal anode instability, including dendrite growth, metal corrosion, and hetero-ions interference, occurring at the electrolyte/electrode interface of aqueous batteries, are among the most critical issues hindering their widespread use in energy storage. Herein, a universal strategy is proposed to overcome the anode instability issues by rationally designing alloyed materials, using Zn-M alloys as model systems (M = Mn and other transition metals). An in-situ optical visualization coupled with finite element analysis is utilized to mimic actual electrochemical environments analogous to the actual aqueous batteries and analyze the complex electrochemical behaviors. The Zn-Mn alloy anodes achieved stability over thousands of cycles even under harsh electrochemical conditions, including testing in seawater-based aqueous electrolytes and using a high current density of 80 mA cm-2. The proposed design strategy and the in-situ visualization protocol for the observation of dendrite growth set up a new milestone in developing durable electrodes for aqueous batteries and beyond.
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Affiliation(s)
- Huajun Tian
- NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, USA
| | - Zhao Li
- NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, USA
| | - Guangxia Feng
- Electrical and Computer Engineering Department, W306, Engineering Building 2, University of Houston, Houston, TX, 77204, USA
| | - Zhenzhong Yang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - David Fox
- NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, USA
- Department of Chemistry, University of Central Florida, Orlando, FL, 32826, USA
| | - Maoyu Wang
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR, 97331, USA
| | - Hua Zhou
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Lei Zhai
- NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, USA
- Department of Chemistry, University of Central Florida, Orlando, FL, 32826, USA
| | - Akihiro Kushima
- NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, USA
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL, 32826, USA
- Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, FL, 32826, USA
| | - Yingge Du
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Zhenxing Feng
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR, 97331, USA.
| | - Xiaonan Shan
- Electrical and Computer Engineering Department, W306, Engineering Building 2, University of Houston, Houston, TX, 77204, USA.
| | - Yang Yang
- NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, USA.
- Department of Materials Science and Engineering, University of Central Florida, Orlando, FL, 32826, USA.
- Energy Conversion and Propulsion Cluster, University of Central Florida, Orlando, FL, 32826, USA.
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17
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Affiliation(s)
- Xingcai Qin
- State Key laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Tao Wu
- State Key laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Ying Zhu
- State Key laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Xiaonan Shan
- Biosensor and Bioelectronics Center, the Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Chenbin Liu
- Biosensor and Bioelectronics Center, the Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Nongjian Tao
- State Key laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
- Biosensor and Bioelectronics Center, the Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
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18
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Qin X, Yu J, Jiao M, Shan X, Xian X, Wang D, Tao N. Integrating Electrochemical and Colorimetric Sensors with a Webcam Readout for Multiple Gas Detection. Anal Chem 2020; 92:799-805. [PMID: 31762258 DOI: 10.1021/acs.analchem.9b03202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Multisensor detectors have merits of low cost, compact size, and capability of supplying accurate and reliable information otherwise hard to obtain by any single sensors. They are therefore highly desired in various applications. Despite the advantages and needs, they face great challenges in technique especially when integrating sensors with different sensing principles. To bridge the gap between the demand and technique, we here demonstrated an integration of electrochemical and colorimetric sensors with a webcam readout for multiple gas detection. Designed with two parallel gas channels but independent sensor cells, the dual-sensor detector could simultaneously detect each gas from their gas mixture by analysis of the group photo of the two sensors. Using Ag electro-dissolution as reporter, the bipolar electrochemical sensor achieved quantitative analysis for the first time thanks to application of pulse voltage. The sacrificed Ag layer used in the bipolar electrochemical (EC) sensor was recycled from CD, which further decreased the sensor cost and supplied a new way of CD recycling. The EC O2 sensor response, edge displacement of Ag layer due to electrochemical dissolution, has a linear relationship with O2 concentration ranging from 0 to 30% and has good selectivity to common oxidative gases. The colorimetric NO2 sensor linearly responded to NO2 concentrations ranging from 0 to 230 ppb with low detection limit of 10 ppb, good selectivity, and humidity tolerance. This integration method could be extended to integrating other gas sensors.
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Affiliation(s)
- Xingcai Qin
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , Jiangsu 210023 , China
| | - Jingjing Yu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , Jiangsu 210023 , China
| | - Mengchi Jiao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , Jiangsu 210023 , China
| | - Xiaonan Shan
- Biosensor and Bioelectronics Center, the Biodesign Institute , Arizona State University , Tempe , Arizona 85287 , United States
| | - Xiaojun Xian
- Biosensor and Bioelectronics Center, the Biodesign Institute , Arizona State University , Tempe , Arizona 85287 , United States
| | - Di Wang
- Biosensor and Bioelectronics Center, the Biodesign Institute , Arizona State University , Tempe , Arizona 85287 , United States
| | - Nongjian Tao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , Jiangsu 210023 , China.,Biosensor and Bioelectronics Center, the Biodesign Institute , Arizona State University , Tempe , Arizona 85287 , United States
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19
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Qin N, Shan X, Sun X, Liswaniso S, Chimbaka IM, Xu R. Evaluation and Validation of the Six Housekeeping Genes for Normalizing Mrna Expression in the Ovarian Follicles and Several Tissues in Chicken. Braz J Poult Sci 2020. [DOI: 10.1590/1806-9061-2019-1256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- N Qin
- Jilin Agricultural University, China; Ministry of Education, P. R. China
| | - X Shan
- Jilin Agricultural University, China
| | - X Sun
- Jilin Agricultural University, China; Ministry of Education, P. R. China
| | - S Liswaniso
- Jilin Agricultural University, China; Ministry of Education, P. R. China
| | - IM Chimbaka
- Jilin Agricultural University, China; Ministry of Education, P. R. China
| | - R Xu
- Jilin Agricultural University, China; Ministry of Education, P. R. China
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20
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Abstract
Measuring ligand-protein interactions is critical for unveiling molecular-scale biological processes in living systems and for screening drugs. Various detection technologies have been developed, but quantifying the binding kinetics of small molecules to the proteins remains challenging because the sensitivities of the mainstream technologies decrease with the size of the ligand. Here, we report a method to measure and quantify the binding kinetics of both large and small molecules with self-assembled nano-oscillators, each consisting of a nanoparticle tethered to a surface via long polymer molecules. By applying an oscillating electric field normal to the surface, the nanoparticle oscillates, and the oscillation amplitude is proportional to the number of charges on the nano-oscillator. Upon the binding of ligands onto the nano-oscillator, the oscillation amplitude will change. Using a plasmonic imaging approach, the oscillation amplitude is measured with subnanometer precision, allowing us to accurately quantify the binding kinetics of ligands, including small molecules, to their protein receptors. This work demonstrates the capability of nano-oscillators as an useful tool for measuring the binding kinetics of both large and small molecules.
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Affiliation(s)
- Guangzhong Ma
- Biodesign Center for Bioelectronics and Biosensors , Arizona State University , Tempe , Arizona 85287 , United States.,School of Molecular Sciences , Arizona State University , Tempe , Arizona 85287 , United States
| | - Xiaonan Shan
- Biodesign Center for Bioelectronics and Biosensors , Arizona State University , Tempe , Arizona 85287 , United States.,School of Electrical, Computer and Energy Engineering , Arizona State University , Tempe , Arizona 85287 , United States
| | - Shaopeng Wang
- Biodesign Center for Bioelectronics and Biosensors , Arizona State University , Tempe , Arizona 85287 , United States
| | - Nongjian Tao
- Biodesign Center for Bioelectronics and Biosensors , Arizona State University , Tempe , Arizona 85287 , United States.,School of Electrical, Computer and Energy Engineering , Arizona State University , Tempe , Arizona 85287 , United States
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21
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Liu R, Shan X, Wang H, Tao N. Plasmonic Measurement of Electron Transfer between a Single Metal Nanoparticle and an Electrode through a Molecular Layer. J Am Chem Soc 2019; 141:11694-11699. [PMID: 31260624 DOI: 10.1021/jacs.9b05388] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We study electron transfer associated with electrocatalytic reduction of hydrogen on single platinum nanoparticles separated from an electrode surface with an alkanethiol monolayer using a plasmonic imaging technique. By varying the monolayer thickness, we show that the reaction rate depends on electron tunneling from the electrode to the nanoparticle. The tunneling decay constant is ∼4.3 nm-1, which is small compared to those in literature for alkanethiols. We attribute it to a reduced tunneling barrier resulting from biasing the electrode potential negatively to the hydrogen reduction regime. In addition to allowing study of electron transfer of single nanoparticles, the work demonstrates an optical method to measure charge transport in molecules electrically wired to two electrodes.
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Affiliation(s)
- Ruihong Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Xiaonan Shan
- Department of Electrical and Computer Engineering , University of Houston , Houston , Texas 77204 , United States
| | - Hui Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Nongjian Tao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China.,Biodesign Center for Bioelectronics and Biosensors and School of Electrical, Energy and Computer Engineering , Arizona State University , Tempe , Arizona 85287 , United States
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22
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Shan X, Yu M, Zhao X. Ectopic origin and communicating branch of left anterior descending artery arising from the conus artery: a rare coronary anomaly. Herz 2019; 45:111-112. [PMID: 31254012 DOI: 10.1007/s00059-019-4830-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/25/2019] [Accepted: 06/10/2019] [Indexed: 11/28/2022]
Affiliation(s)
- X Shan
- Department of Cardiovasology, Changhai Hospital, Second Military Medical University, 168 Changhai Road, 200433, Shanghai, China
| | - M Yu
- Department of Cardiovasology, Changhai Hospital, Second Military Medical University, 168 Changhai Road, 200433, Shanghai, China
| | - X Zhao
- Department of Cardiovasology, Changhai Hospital, Second Military Medical University, 168 Changhai Road, 200433, Shanghai, China.
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23
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Sung YL, Garan J, Hu Z, Shan X, Shih WC. Modeling the surface of fast-cured polymer droplet lenses for precision fabrication. Appl Opt 2018; 57:10342-10347. [PMID: 30645242 DOI: 10.1364/ao.57.010342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Optical lenses with diameter in the millimeter range have found important commercial use in smartphone cameras. Although these lenses are typically made by molding, recent demonstration of fast-cured polymer droplets by inkjet printing has gained interest for cost-effective smartphone microscopy. In this technique, the surface of a fast-cured polydimethylsiloxane droplet obtains dynamic equilibrium via the interplay of surface tension, gravity, thermalization, and a steep viscosity hike. The nature of surface formation involves multiple physical and chemical domains, which represent significant challenges in modeling with the Young-Laplace theory, assuming constant surface tension and viscosity. To overcome these challenges, we introduce the concept of effective surface tension, which allows fast-cured polymer droplets to be modeled as normal liquid droplets with constant viscosity.
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24
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He Y, Li J, Mao W, Zhang D, Liu M, Shan X, Zhang B, Zhu C, Shen J, Deng Z, Wang Z, Yu W, Chen Q, Guo W, Su P, Lv R, Li G, Li G, Pei B, Jiao L, Shen G, Liu Y, Feng Z, Su Y, Xie Y, Di W, Liu X, Yang X, Wang J, Qi J, Liu Q, Han Y, He J, Cai J, Zhang Z, Zhu F, Du D. HLA common and well-documented alleles in China. HLA 2018; 92:199-205. [DOI: 10.1111/tan.13358] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/22/2018] [Accepted: 07/29/2018] [Indexed: 11/29/2022]
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25
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Nguyen H, Sung Y, O’Shaughnessy K, Shan X, Shih WC. Smartphone Nanocolorimetry for On-Demand Lead Detection and Quantitation in Drinking Water. Anal Chem 2018; 90:11517-11522. [DOI: 10.1021/acs.analchem.8b02808] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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26
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Ma G, Syu GD, Shan X, Henson B, Wang S, Desai PJ, Zhu H, Tao N. Measuring Ligand Binding Kinetics to Membrane Proteins Using Virion Nano-oscillators. J Am Chem Soc 2018; 140:11495-11501. [PMID: 30114365 DOI: 10.1021/jacs.8b07461] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Membrane proteins play vital roles in cellular signaling processes and serve as the most popular drug targets. A key task in studying cellular functions and developing drugs is to measure the binding kinetics of ligands with the membrane proteins. However, this has been a long-standing challenge because one must perform the measurement in a membrane environment to maintain the conformations and functions of the membrane proteins. Here, we report a new method to measure ligand binding kinetics to membrane proteins using self-assembled virion oscillators. Virions of human herpesvirus were used to display human G-protein-coupled receptors (GPCRs) on their viral envelopes. Each virion was then attached to a gold-coated glass surface via a flexible polymer to form an oscillator and driven into oscillation with an alternating electric field. By tracking changes in the oscillation amplitude in real-time with subnanometer precision, the binding kinetics between ligands and GPCRs was measured. We anticipate that this new label-free detection technology can be readily applied to measure small or large ligand binding to any type of membrane proteins and thus contribute to the understanding of cellular functions and screening of drugs.
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Affiliation(s)
- Guangzhong Ma
- Biodesign Center for Bioelectronics and Biosensors , Arizona State University , Tempe , Arizona 85287 , United States
| | - Guan-Da Syu
- Viral Oncology Program , The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins , Baltimore , Maryland 21231 , United States.,Department of Pharmacology and Molecular Sciences , Johns Hopkins School of Medicine , Baltimore , Maryland 21205 , United States.,Center for High-Throughput Biology , Johns Hopkins School of Medicine , Baltimore , Maryland 21205 , United States
| | - Xiaonan Shan
- Biodesign Center for Bioelectronics and Biosensors , Arizona State University , Tempe , Arizona 85287 , United States.,School of Electrical, Computer and Energy Engineering , Arizona State University , Tempe , Arizona 85287 , United States
| | - Brandon Henson
- Viral Oncology Program , The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins , Baltimore , Maryland 21231 , United States
| | - Shaopeng Wang
- Biodesign Center for Bioelectronics and Biosensors , Arizona State University , Tempe , Arizona 85287 , United States
| | - Prashant J Desai
- Viral Oncology Program , The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins , Baltimore , Maryland 21231 , United States
| | - Heng Zhu
- Department of Pharmacology and Molecular Sciences , Johns Hopkins School of Medicine , Baltimore , Maryland 21205 , United States.,Center for High-Throughput Biology , Johns Hopkins School of Medicine , Baltimore , Maryland 21205 , United States
| | - Nongjian Tao
- Biodesign Center for Bioelectronics and Biosensors , Arizona State University , Tempe , Arizona 85287 , United States.,School of Electrical, Computer and Energy Engineering , Arizona State University , Tempe , Arizona 85287 , United States
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27
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Abstract
Electrochemistry studies charge transfer and related processes at various microscopic structures (atomic steps, islands, pits and kinks on electrodes), and mesoscopic materials (nanoparticles, nanowires, viruses, vesicles and cells) made by nature and humans, involving ions and molecules. The traditional approach measures averaged electrochemical quantities of a large ensemble of these individual entities, including the microstructures, mesoscopic materials, ions and molecules. There is a need to develop tools to study single entities because a real system is usually heterogeneous, e.g., containing nanoparticles with different sizes and shapes. Even in the case of "homogeneous" molecules, they bind to different microscopic structures of an electrode, assume different conformations and fluctuate over time, leading to heterogeneous reactions. Here we highlight some emerging tools for studying single entity electrochemistry, discuss their strengths and weaknesses, and provide personal views on the need for tools with new capabilities for further advancing single entity electrochemistry.
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Affiliation(s)
- Yixian Wang
- Center for Biosensors and Bioelectronics, Biodesign Institute and School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA.
| | - Xiaonan Shan
- Center for Biosensors and Bioelectronics, Biodesign Institute and School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA.
| | - Nongjian Tao
- Center for Biosensors and Bioelectronics, Biodesign Institute and School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA. and State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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28
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Chen L, Shen J, Shan X, Wang F, Kan T, Tang X, Zhao X, Qin Y. Improvement of tricuspid regurgitation after transcatheter ASD closure in older patients. Herz 2017; 43:529-534. [DOI: 10.1007/s00059-017-4594-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 05/13/2017] [Accepted: 06/16/2017] [Indexed: 11/30/2022]
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29
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Wang Y, Wang H, Chen Y, Wang Y, Chen HY, Shan X, Tao N. Fast Electrochemical and Plasmonic Detection Reveals Multitime Scale Conformational Gating of Electron Transfer in Cytochrome c. J Am Chem Soc 2017; 139:7244-7249. [PMID: 28478669 DOI: 10.1021/jacs.7b00839] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Conformational fluctuations play a central role in the electron transfer reactions of molecules. Because the fluctuations can be extremely fast in kinetics and small in amplitude, a technique with fast temporal resolution and high conformational sensitivity is needed to follow the transient electron transfer processes. Here we report on an electrochemically controlled plasmonic detection technique capable of monitoring conformational changes in redox molecules with ns response time. Using the technique, we study the electron transfer reaction and the associated conformational gating of a redox protein (cytochrome c). The study reveals that the conformational gating takes place over a broad range of time scales, from microsecond to millisecond.
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Affiliation(s)
- Yan Wang
- Biodesign Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Hui Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Yuheng Chen
- Biodesign Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Yixian Wang
- Department of Chemistry and Biochemistry, California State University, Los Angeles , Los Angeles, California 90032, United States
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Xiaonan Shan
- Department of Electrical & Computer Engineering, University of Houston , Houston, Texas 77024, United States
| | - Nongjian Tao
- Biodesign Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.,State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
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30
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Maeo S, Saito A, Otsuka S, Shan X, Kanehisa H, Kawakami Y. Localization of muscle damage within the quadriceps femoris induced by different types of eccentric exercises. Scand J Med Sci Sports 2017; 28:95-106. [DOI: 10.1111/sms.12880] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2017] [Indexed: 01/22/2023]
Affiliation(s)
- S. Maeo
- Faculty of Sport Sciences; Waseda University; Tokorozawa Saitama Japan
- Research Fellow of Japan Society for the Promotion of Science; Chiyoda Tokyo Japan
| | - A. Saito
- Faculty of Sport Sciences; Waseda University; Tokorozawa Saitama Japan
| | - S. Otsuka
- Faculty of Sport Sciences; Waseda University; Tokorozawa Saitama Japan
| | - X. Shan
- Faculty of Sport Sciences; Waseda University; Tokorozawa Saitama Japan
| | - H. Kanehisa
- Department of Sports and Life Science; National Institute of Fitness and Sports in Kanoya; Kanoya Kagoshima Japan
| | - Y. Kawakami
- Faculty of Sport Sciences; Waseda University; Tokorozawa Saitama Japan
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Thaper D, Vahid S, Nip KM, Moskalev I, Shan X, Frees S, Roberts ME, Ketola K, Harder KW, Gregory-Evans C, Bishop JL, Zoubeidi A. Targeting Lyn regulates Snail family shuttling and inhibits metastasis. Oncogene 2017; 36:3964-3975. [PMID: 28288135 DOI: 10.1038/onc.2017.5] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 11/27/2016] [Accepted: 12/27/2016] [Indexed: 02/06/2023]
Abstract
The acquisition of an invasive phenotype by epithelial cells occurs through a loss of cellular adhesion and polarity, heralding a multistep process that leads to metastatic dissemination. Since its characterization in 1995, epithelial-mesenchymal transition (EMT) has been closely linked to the metastatic process. As a defining aspect of EMT, loss of cell adhesion through downregulation of E-cadherin is carried out by several transcriptional repressors; key among them the SNAI family of transcription factors. Here we identify for the first time that Lyn kinase functions as a key modulator of SNAI family protein localization and stability through control of the Vav-Rac1-PAK1 (Vav-Rac1-p21-activated kinase) pathway. Accordingly, targeting Lyn in vitro reduces EMT and in vivo reduces metastasis of primary tumors. We also demonstrate the clinical relevance of targeting Lyn as a key player controlling EMT; patient samples across many cancers revealed a strong negative correlation between Lyn and E-cadherin, and high Lyn expression in metastatic tumors as well as metastasis-prone primary tumors. This work reveals a novel pancancer mechanism of Lyn-dependent control of EMT and further underscores the role of this kinase in tumor progression.
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Affiliation(s)
- D Thaper
- Department of Urology, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada.,Faculty of Medicine, Department of Urologic Science, University of British Columbia, Vancouver, BC, Canada
| | - S Vahid
- Department of Urology, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada.,Faculty of Medicine, Department of Urologic Science, University of British Columbia, Vancouver, BC, Canada
| | - K M Nip
- Department of Urology, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada.,Faculty of Medicine, Department of Urologic Science, University of British Columbia, Vancouver, BC, Canada
| | - I Moskalev
- Department of Urology, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - X Shan
- Faculty of Medicine, Department Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, BC, Canada
| | - S Frees
- Department of Urology, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - M E Roberts
- Faculty of Science, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - K Ketola
- Department of Urology, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - K W Harder
- Faculty of Science, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - C Gregory-Evans
- Faculty of Medicine, Department Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, BC, Canada
| | - J L Bishop
- Department of Urology, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada
| | - A Zoubeidi
- Department of Urology, Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, Canada.,Faculty of Medicine, Department of Urologic Science, University of British Columbia, Vancouver, BC, Canada
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32
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Affiliation(s)
- Hui Yu
- State
Key Laboratory of Analytical Chemistry for Life Science, School of
Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Xiaonan Shan
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Shaopeng Wang
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Nongjian Tao
- State
Key Laboratory of Analytical Chemistry for Life Science, School of
Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
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Abstract
Bone desensitization after mechanical loading is essential for bone to adapt to its mechanical environment. However, the desensitization mechanism is unknown. Previous studies suggest that G protein-coupled receptors (GPCRs), including P2Y and parathyroid hormone receptors, play important roles in osteoblast mechanobiology. Thus, for the present research, we examined the role of G protein-coupled receptor kinase 2 (GRK2) in osteoblast desensitization after exposure to mechanical stimulation. We first showed the existence of osteoblast desensitization after mechanical stimulation based on cytosol Ca2+ and phosphorylated ERK1/2 activities, detected using a fluorescent Ca2+-sensitive dye and western blotting, respectively. We then demonstrated that GRK2 overexpression in MC3T3-E1 cells inhibits flow-induced ERK1/2 phosphorylation, while siRNA knockdown of GRK2 enhances ERK1/2 phosphorylation. Additionally, we found that GRK2 overexpression in MC3T3-E1 cells inhibits cyclooxygenase-2 mRNA expression in the short term and alkaline phosphatase activity in the long term. More importantly, we discovered that GRK2 translocated to the cell membrane shortly after flow stimulation - a step necessary for GPCR desensitization. Previously, we have demonstrated that P2Y2 purinergic receptors, one type of GPCRs, are involved in various flow-induced osteoblastic responses. In this research, we also showed that GRK2 overexpression does not affect ATP release. Accordingly, GRK2 is able to inhibit flow-induced osteoblast responses possibly through desensitizing P2Y2 receptors.
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Affiliation(s)
- Y Xing
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, China Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | | | - X Shan
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, China Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - L Wang
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing, China Department of Orthopaedics and Rehabilitation, The Pennsylvania State University College of Medicine, Hershey, PA, USA
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34
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Affiliation(s)
- Yixian Wang
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
- Department
of Chemistry and Biochemistry, California State University, Los Angeles, Los Angeles, California 90032, United States
| | - Xiaonan Shan
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
- Department of Electrical & Computer Engineering, University of Houston, Houston, Texas 77024, United States
| | - Hui Wang
- State
Key Laboratory of Analytical Chemistry for Life Science, School of
Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Shaopeng Wang
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Nongjian Tao
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
- State
Key Laboratory of Analytical Chemistry for Life Science, School of
Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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35
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Affiliation(s)
- Hui Wang
- State Key Laboratory of Analytical Chemistry for Life Science; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 China
| | - Xiaonan Shan
- Center for Bioelectronics and Biosensors, Biodesign Institute; Arizona State University; Tempe AZ 85287 USA
| | - Hui Yu
- Center for Bioelectronics and Biosensors, Biodesign Institute; Arizona State University; Tempe AZ 85287 USA
| | - Yan Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute; Arizona State University; Tempe AZ 85287 USA
| | | | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 China
| | - Nongjian Tao
- State Key Laboratory of Analytical Chemistry for Life Science; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 China
- Center for Bioelectronics and Biosensors, Biodesign Institute; Arizona State University; Tempe AZ 85287 USA
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Abstract
Because graphene has nearly zero density of states at the Dirac point, charging it must overcome Pauli repulsion. We show here that this repulsion causes graphene to expand, which is measurable with an optical edge-tracking method despite that graphene is the strongest material. The expansion increases quadratically with applied voltage as predicted by theory and has a coefficient of ∼10-4 per V at 1 V. Graphene has many attractive properties, but it lacks piezoelectricity, which limits its electromechanical applications. The observed Pauli repulsion-induced expansion provides an alternative way to electrically control graphene dimension. It also provides a simple and direct method to measure the elastic properties of graphene and other low dimensional materials.
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Affiliation(s)
- Hui Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Xiaonan Shan
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Nongjian Tao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
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38
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Chen Y, Zhao JY, Shan X, Han XL, Tian SG, Chen FY, Su XT, Sun YS, Huang LY, Han L. A point-prevalence survey of healthcare-associated infection in fifty-two Chinese hospitals. J Hosp Infect 2016; 95:105-111. [PMID: 28007308 DOI: 10.1016/j.jhin.2016.08.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 08/10/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Healthcare-associated infection (HCAI) represents a major problem for patient safety worldwide. AIM To demonstrate the prevalence, causative agents, and risk factors for HCAI in Chinese hospitals. METHODS A one-day point-prevalence survey was conducted in 52 Chinese hospitals between October 2014 and March 2015. A web-based software system was developed for data entry and management. FINDINGS Among 53,939 patients surveyed, the prevalence of patients with at least one HCAI was 3.7%. Of 2182 HCAI episodes, the most frequently occurring types were lower respiratory tract infections (47.2%), followed by urinary tract infection (12.3%), upper respiratory tract infection (11.0%), and surgical site infection (6.2%). The prevalence of patients with at least one HCAI in critical care units was highest (17.1%). Device-associated infections, including ventilator-associated pneumonia, catheter-associated urinary tract infection, and central catheter-associated bloodstream infection, accounted for only 7.9% of all HCAIs. The most frequently isolated micro-organisms were Pseudomonas aeruginosa [206 infections (9.4%)], Acinetobacter baumannii [172 infections (7.9%)], Klebsiella pneumoniae [160 infections (7.3%)], and Escherichia coli [145 infections (6.6%)]. Of the survey patients (18,206/53,939), 33.8% were receiving at least one antimicrobial agent at the time of the survey. Risk factors for HCAI included older age (≥80 years), male gender, days of hospital admission, admission into a critical care unit, and device utilization. CONCLUSION Our study suggests that the overall prevalence of HCAI in surveyed Chinese hospitals was lower than that reported from most European countries and the USA. More attention should be given to the surveillance and prevention of non-device-associated HCAI in China.
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Affiliation(s)
- Y Chen
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China
| | - J Y Zhao
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China
| | - X Shan
- School of Public Health, Peking University, Beijing, China
| | - X L Han
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China
| | - S G Tian
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China
| | - F Y Chen
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China
| | - X T Su
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China
| | - Y S Sun
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China
| | - L Y Huang
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China
| | - L Han
- Institute of Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, China.
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Abstract
We report on imaging of local electric field on an electrode surface with plasmonic electrochemical impedance microscopy (P-EIM). The local electric field is created by putting an electrode inside a micropipet positioned over the electrode and applying a voltage between the two electrodes. We show that the distribution of the surface charge as well as the local electric field at the electrode surface can be imaged with P-EIM. The spatial distribution and the dependence of the local charge density and electric field on the distance between the micropipet and the surface are measured, and the results are compared with the finite element calculations. The work also demonstrates the possibility of integrating plasmonic imaging with scanning ion conductance microscopy (SICM) and other scanning probe microscopies.
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Affiliation(s)
- Yixian Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.,Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States
| | - Xiaonan Shan
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.,Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States
| | - Shaopeng Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.,Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States
| | - Nongjian Tao
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.,Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States
| | - Pierre-Yves Blanchard
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.,Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States
| | - Keke Hu
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.,Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States
| | - Michael V Mirkin
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States.,Department of Chemistry and Biochemistry, Queens College-CUNY , Flushing, New York 11367, United States
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40
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Chen Z, Shan X, Guan Y, Wang S, Zhu JJ, Tao N. Imaging Local Heating and Thermal Diffusion of Nanomaterials with Plasmonic Thermal Microscopy. ACS Nano 2015; 9:11574-81. [PMID: 26435320 DOI: 10.1021/acsnano.5b05306] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Measuring local heat generation and dissipation in nanomaterials is critical for understanding the basic properties and developing applications of nanomaterials, including photothermal therapy and joule heating of nanoelectronics. Several technologies have been developed to probe local temperature distributions in nanomaterials, but a sensitive thermal imaging technology with high temporal and spatial resolution is still lacking. Here, we describe plasmonic thermal microscopy (PTM) to image local heat generation and diffusion from nanostructures in biologically relevant aqueous solutions. We demonstrate that PTM can detect local temperature change as small as 6 mK with temporal resolution of 10 μs and spatial resolution of submicrons (diffraction limit). With PTM, we have successfully imaged photothermal generation from single nanoparticles and graphene pieces, studied spatiotemporal distribution of temperature surrounding a heated nanoparticle, and observed heating at defect sites in graphene. We further show that the PTM images are in quantitative agreement with theoretical simulations based on heat transport theories.
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Affiliation(s)
- Zixuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Xiaonan Shan
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Yan Guan
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Shaopeng Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University , Tempe, Arizona 85287, United States
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Nongjian Tao
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
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41
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Shan X, Chen S, Wang H, Chen Z, Guan Y, Wang Y, Wang S, Chen HY, Tao N. Mapping Local Quantum Capacitance and Charged Impurities in Graphene via Plasmonic Impedance Imaging. Adv Mater 2015; 27:6213-6219. [PMID: 26356349 DOI: 10.1002/adma.201502822] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 07/16/2015] [Indexed: 06/05/2023]
Abstract
Local quantum capacitance of graphene is imaged with plasmonics-based electrical impedance microscopy, from which the local density and polarity of charged impurities, electron and hole puddles associated with the charged impurities, and the density of the impurity states are determined.
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Affiliation(s)
- Xiaonan Shan
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Shan Chen
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Hui Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Zixuan Chen
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Yan Guan
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Yixian Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Shaopeng Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Nongjian Tao
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
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42
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Chen Y, Jia P, Zhang J, Qin L, Chen H, Gao F, Zhang X, Shan X, Ning Y, Wang L. Gain-coupled distributed feedback laser based on periodic surface anode canals. Appl Opt 2015; 54:8863-8866. [PMID: 26560371 DOI: 10.1364/ao.54.008863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A single-longitude-mode, broad-stripe, gain-coupled, distributed-feedback laser based on periodic surface anode canals (PSACs) is demonstrated. The PSACs, produced by i-line lithography, enhance the contrast of periodic current density in the active layer without introducing effective photon coupling; calculated grating κL is only 0.026. Power of 144.6 mW at 968.8 nm, with spectrum linewidth less than 0.04 nm on every uncoated cleavage facet, is obtained at a current of 1.2 A with a side-mode suppression ratio >29 dB.
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43
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Hao Q, Shan X, Lei J, Zang Y, Yang Q, Ju H. A wavelength-resolved ratiometric photoelectrochemical technique: design and sensing applications. Chem Sci 2015; 7:774-780. [PMID: 28966769 PMCID: PMC5580031 DOI: 10.1039/c5sc03336e] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 10/15/2015] [Indexed: 12/23/2022] Open
Abstract
A wavelength-resolved ratiometric photoelectrochemical technique was developed as a novel concept for designing ratiometric photoelectrochemical sensors.
In this work, a wavelength-resolved ratiometric photoelectrochemical (WR-PEC) technique was investigated and employed to construct a new type of PEC sensor with good sensitivity and anti-interference ability. The WR-PEC hybrid photoelectrodes were stepwise assembled using semiconductor quantum dots (QDs) and photoactive dyes. Under continuous irradiation, the photocurrent–wavelength (I–λ) curves reveal the dependence of the photocurrent on the wavelength. By monitoring the ratios of the two different PEC peak values, a wavelength-resolved ratiometric strategy was realized. Using CdS QDs and methylene blue (MB) as photoactive models, a dual-anodic WR-PEC sensor was established for sensitive detection of Cu2+. This ratiometric strategy was identified to be based on the quenching effect of Cu2+ towards CdS QDs and enhancement of the MB photocurrent through catalytic oxidation of leuco-MB. Under continuous illumination from 400 nm to 800 nm at a 0.1 V bias potential, a WR-PEC sensor for Cu2+ was developed with a wide linear range and a detection limit of 0.37 nM. This WR-PEC had a greatly improved anti-interference ability in a complex environment, and showed acceptable stability. Moreover, using the CdS/magnesium phthalocyanine (MgPc) and CdTe/MgPc as photoelectrodes, anodic–cathodic and dual-cathodic WR-PEC sensors were established, respectively. The WR-PEC technique could serve as a novel concept for designing ratiometric or multi-channel PEC sensors.
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Affiliation(s)
- Qing Hao
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China . ; ; Tel: +86 25 83593593
| | - Xiaonan Shan
- Center for Bioelectronics and Biosensors , Biodesign Institute , Arizona State University , Tempe , Arizona 85287 , USA
| | - Jianping Lei
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China . ; ; Tel: +86 25 83593593
| | - Yang Zang
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China . ; ; Tel: +86 25 83593593
| | - Qianhui Yang
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China . ; ; Tel: +86 25 83593593
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China . ; ; Tel: +86 25 83593593
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Guan Y, Shan X, Zhang F, Wang S, Chen HY, Tao N. Kinetics of small molecule interactions with membrane proteins in single cells measured with mechanical amplification. Sci Adv 2015; 1:e1500633. [PMID: 26601298 PMCID: PMC4646812 DOI: 10.1126/sciadv.1500633] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 09/14/2015] [Indexed: 05/21/2023]
Abstract
Measuring small molecule interactions with membrane proteins in single cells is critical for understanding many cellular processes and for screening drugs. However, developing such a capability has been a difficult challenge. We show that molecular interactions with membrane proteins induce a mechanical deformation in the cellular membrane, and real-time monitoring of the deformation with subnanometer resolution allows quantitative analysis of small molecule-membrane protein interaction kinetics in single cells. This new strategy provides mechanical amplification of small binding signals, making it possible to detect small molecule interactions with membrane proteins. This capability, together with spatial resolution, also allows the study of the heterogeneous nature of cells by analyzing the interaction kinetics variability between different cells and between different regions of a single cell.
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Affiliation(s)
- Yan Guan
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
- School of Electrical Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA
| | - Xiaonan Shan
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
| | - Fenni Zhang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
- School of Electrical Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA
| | - Shaopeng Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- Corresponding author. E-mail: (N.T.); (H.-Y.C.)
| | - Nongjian Tao
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
- School of Electrical Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- Corresponding author. E-mail: (N.T.); (H.-Y.C.)
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45
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Shi W, Shan X, Hua H, Zhou D, Cai Z. Integrated profiling of mRNAs and microRNAs to identify potential biomarkers for oral malignant transformation. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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46
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Xie S, Wang K, Xu H, Hua R, Li T, Shan X, Cai Z. Extracapsular dissection versus superficial parotidectomy in treatment of benign parotid tumors: evidence from 3194 patients. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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47
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Yang Y, Yu H, Shan X, Wang W, Liu X, Wang S, Tao N. Label-Free Tracking of Single Organelle Transportation in Cells with Nanometer Precision Using a Plasmonic Imaging Technique. Small 2015; 11:2878-84. [PMID: 25703098 PMCID: PMC4474744 DOI: 10.1002/smll.201403016] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 11/20/2014] [Indexed: 05/14/2023]
Abstract
Imaging and tracking of nano- and micrometer-sized organelles in cells with nanometer precision is crucial for understanding cellular behaviors at the molecular scale. Because of the fast intracellular dynamic processes, the imaging and tracking method must also be fast. In addition, to ensure that the observed dynamics is relevant to the native functions, it is critical to keep the cells under their native states. Here, a plasmonics-based imaging technique is demonstrated for studying the dynamics of organelles in 3D with high localization precision (5 nm) and temporal (10 ms) resolution. The technique is label-free and can track subcellular structures in the native state of the cells. Using the technique, nanometer steps of organelle (e.g., mitochondria) transportation are observed along neurite microtubules in primary neurons, and the 3D structure of neurite microtubule bundles is reconstructed at the nanometer scale from the tracks of the moving organelles.
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Affiliation(s)
- Yunze Yang
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287 USA
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - Hui Yu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Xiaonan Shan
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287 USA
| | - Wei Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Xianwei Liu
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287 USA
| | - Shaopeng Wang
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287 USA
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Nongjian Tao
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287 USA
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
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48
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Fang Y, Chen S, Wang W, Shan X, Tao N. Real-Time Monitoring of Phosphorylation Kinetics with Self-Assembled Nano-oscillators. Angew Chem Int Ed Engl 2015; 54:2538-42. [DOI: 10.1002/anie.201411040] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Indexed: 01/30/2023]
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49
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Fang Y, Chen S, Wang W, Shan X, Tao N. Real-Time Monitoring of Phosphorylation Kinetics with Self-Assembled Nano-oscillators. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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50
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Wang Y, Shan X, Cui F, Li J, Wang S, Tao N. Electrochemical Reactions in Subfemtoliter-Droplets Studied with Plasmonics-Based Electrochemical Current Microscopy. Anal Chem 2014; 87:494-8. [DOI: 10.1021/ac5036692] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yixian Wang
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5706, United States
| | - Xiaonan Shan
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5706, United States
| | - Fengjuan Cui
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Jinghong Li
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Shaopeng Wang
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5706, United States
| | - Nongjian Tao
- Center
for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5706, United States
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