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Jiang Y, Zhang J, Jung SR, Chen H, Xu S, Chiu DT. High-Precision Mapping of Membrane Proteins on Synaptic Vesicles using Spectrally Encoded Super-Resolution Imaging. Angew Chem Int Ed Engl 2023; 62:e202217889. [PMID: 36581589 PMCID: PMC9908834 DOI: 10.1002/anie.202217889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/27/2022] [Accepted: 12/29/2022] [Indexed: 12/31/2022]
Abstract
The spatial resolution of single-molecule localization microscopy is limited by the photon number of a single switching event because of the difficulty of correlating switching events dispersed in time. Here we overcome this limitation by developing a new class of photoswitching semiconducting polymer dots (Pdots) with structured and highly dispersed single-particle spectra. We imaged the Pdots at the first and the second vibronic emission peaks and used the ratio of peak intensities as a spectral coding. By correlating switching events using the spectral coding and performing 4-9 frame binning, we achieved a 2-3 fold experimental resolution improvement versus conventional superresolution imaging. We applied this method to count and map SV2 and proton ATPase proteins on synaptic vesicles (SVs). The results reveal that these proteins are trafficked and organized with high precision, showing unprecedented level of detail about the composition and structure of SVs.
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Affiliation(s)
- Yifei Jiang
- Departments of Chemistry and Bioengineering, University of Washington, Seattle, Washington 98195, USA
- Institute of Basic Medicine and Cancer, Chinese Academy of Science, Hangzhou, Zhejiang 310016, China
| | - Jicheng Zhang
- Departments of Chemistry and Bioengineering, University of Washington, Seattle, Washington 98195, USA
| | - Seung-Ryoung Jung
- Departments of Chemistry and Bioengineering, University of Washington, Seattle, Washington 98195, USA
| | - Haobin Chen
- Departments of Chemistry and Bioengineering, University of Washington, Seattle, Washington 98195, USA
| | - Shihan Xu
- Departments of Chemistry and Bioengineering, University of Washington, Seattle, Washington 98195, USA
| | - Daniel T. Chiu
- Departments of Chemistry and Bioengineering, University of Washington, Seattle, Washington 98195, USA
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Dechantsreiter S, Ambrose AR, Worboys JD, Lim JME, Liu S, Shah R, Montero MA, Quinn AM, Hussell T, Tannahill GM, Davis DM. Heterogeneity in extracellular vesicle secretion by single human macrophages revealed by super-resolution microscopy. J Extracell Vesicles 2022; 11:e12215. [PMID: 35415881 PMCID: PMC9006015 DOI: 10.1002/jev2.12215] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 03/02/2022] [Accepted: 03/26/2022] [Indexed: 12/28/2022] Open
Abstract
The diverse origins, nanometre‐scale and invasive isolation procedures associated with extracellular vesicles (EVs) mean they are usually studied in bulk and disconnected from their parental cell. Here, we used super‐resolution microscopy to directly compare EVs secreted by individual human monocyte‐derived macrophages (MDMs). MDMs were differentiated to be M0‐, M1‐ or M2‐like, with all three secreting EVs at similar densities following activation. However, M0‐like cells secreted larger EVs than M1‐ and M2‐like macrophages. Proteomic analysis revealed variations in the contents of differently sized EVs as well as between EVs secreted by different MDM phenotypes. Super resolution microscopy of single‐cell secretions identified that the class II MHC protein, HLA‐DR, was expressed on ∼40% of EVs secreted from M1‐like MDMs, which was double the frequency observed for M0‐like and M2‐like EVs. Strikingly, human macrophages, isolated from the resected lungs of cancer patients, secreted EVs that expressed HLA‐DR at double the frequency and with greater intensity than M1‐like EVs. Quantitative analysis of single‐cell EV profiles from all four macrophage phenotypes revealed distinct secretion types, five of which were consistent across multiple sample cohorts. A sub‐population of M1‐like MDMs secreted EVs similar to lung macrophages, suggesting an expansion or recruitment of cells with a specific EV secretion profile within the lungs of cancer patients. Thus, quantitative analysis of EV heterogeneity can be used for single cell profiling and to reveal novel macrophage biology.
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Affiliation(s)
- Susanne Dechantsreiter
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Ashley R Ambrose
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Jonathan D Worboys
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Joey M E Lim
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Sylvia Liu
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Rajesh Shah
- Department of Cardiothoracic Surgery and Cellular Pathology, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, UK
| | - M Angeles Montero
- Cellular Pathology, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, UK
| | - Anne Marie Quinn
- Department of Anatomic Pathology, University Hospital Galway, Galway, Ireland
| | - Tracy Hussell
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | | | - Daniel M Davis
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
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Chen H, Yu J, Zhang J, Sun K, Ding Z, Jiang Y, Hu Q, Wu C, Chiu DT. Monitoring Metabolites Using an NAD(P)H‐sensitive Polymer Dot and a Metabolite‐Specific Enzyme. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Haobin Chen
- Department of Chemistry and Bioengineering University of Washington Seattle WA 98195 USA
| | - Jiangbo Yu
- Department of Chemistry and Bioengineering University of Washington Seattle WA 98195 USA
| | - Jicheng Zhang
- Department of Chemistry and Bioengineering University of Washington Seattle WA 98195 USA
| | - Kai Sun
- Department of Chemistry and Bioengineering University of Washington Seattle WA 98195 USA
| | - Zhaoyang Ding
- Department of Chemistry and Bioengineering University of Washington Seattle WA 98195 USA
| | - Yifei Jiang
- Department of Chemistry and Bioengineering University of Washington Seattle WA 98195 USA
| | - Qiongzheng Hu
- Department of Chemistry and Bioengineering University of Washington Seattle WA 98195 USA
| | - Changfeng Wu
- Department of Biomedical Engineering Southern University of Science and Technology Shenzhen Guangdong 510855 China
| | - Daniel T. Chiu
- Department of Chemistry and Bioengineering University of Washington Seattle WA 98195 USA
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Chen H, Yu J, Zhang J, Sun K, Ding Z, Jiang Y, Hu Q, Wu C, Chiu DT. Monitoring Metabolites Using an NAD(P)H-sensitive Polymer Dot and a Metabolite-Specific Enzyme. Angew Chem Int Ed Engl 2021; 60:19331-19336. [PMID: 34146440 DOI: 10.1002/anie.202106156] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/06/2021] [Indexed: 12/24/2022]
Abstract
We introduce an NAD(P)H-sensitive polymer dot (Pdot) biosensor for point-of-care monitoring of metabolites. The Pdot is combined with a metabolite-specific NAD(P)H-dependent enzyme that catalyzes the oxidation of the metabolite, generating NAD(P)H. Upon UV illumination, the NAD(P)H quenches the fluorescence emission of Pdot at 627 nm via electron transfer, and also fluoresces at 458 nm, resulting in a shift from red to blue emission at higher NAD(P)H concentrations. Metabolite concentration is quantified ratiometrically-based on the ratio of blue-to-red channel emission intensities, with a digital camera-with high sensitivity and specificity. We demonstrate phenylalanine biosensing in human plasma for a phenylketonuria screening test, quantifying several other disease-related metabolites (lactate, glucose, glutamate, and β-hydroxybutyrate), and a paper-based assay with smartphore imaging for point-of-care use.
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Affiliation(s)
- Haobin Chen
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Jiangbo Yu
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Jicheng Zhang
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Kai Sun
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Zhaoyang Ding
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Yifei Jiang
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Qiongzheng Hu
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Changfeng Wu
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 510855, China
| | - Daniel T Chiu
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA, 98195, USA
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