1
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Zhang Q, Zhao K, Tang X, Song A, Zhang Z, Yin D. Rational design of an AIEgen for imaging lipid droplets polarity change during ferroptosis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 321:124701. [PMID: 38917752 DOI: 10.1016/j.saa.2024.124701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/14/2024] [Accepted: 06/19/2024] [Indexed: 06/27/2024]
Abstract
Ferroptosis can regulate cell death by accumulating lipid peroxides, affecting the structure and polarity of lipid droplets (LDs), but clear evidence is still lacking. Fluorescence imaging is the most powerful technique for studying LDs' function. However, developing AIE fluorescent probes with high selectivity and sensitivity for targeting LDs remains challenging. In this study, we rationally designed an AIEgen, as a novel fluorescent probe TPE-BD, by constructing a push-pull electron structure. The probe has benzo[b]thiophene-3(2H)-one 1,1-dioxide as the electron acceptor, tetraphenylethylene (AIE skeleton) as the electron donor, and thiophene as the bridging group. The optical performance of probe TPE-BD indicated that the UV-visible absorption spectrum of the probe was minimally affected by solvent polarity (except for glycerol and PBS solvents), but the fluorescence of probe is very sensitive to changes in polarity, achieving the goal of polarity detection in LDs. CCK-8 assay and cell imaging experiments demonstrated that probe TPE-BD exhibited good cell compatibility and effectively targeted LDs, enabling the monitoring of LDs' polarity and quantity during ferroptosis.
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Affiliation(s)
- Qianqian Zhang
- College of Environment Economic, Henan Finance University, Zhengzhou 450046, China.
| | - Kunyu Zhao
- CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaohong Tang
- College of Environment Economic, Henan Finance University, Zhengzhou 450046, China
| | - Ajuan Song
- College of Environment Economic, Henan Finance University, Zhengzhou 450046, China
| | - Zezhi Zhang
- College of Environment Economic, Henan Finance University, Zhengzhou 450046, China
| | - Dan Yin
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China.
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2
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Camunas-Soler J. Integrating single-cell transcriptomics with cellular phenotypes: cell morphology, Ca 2+ imaging and electrophysiology. Biophys Rev 2024; 16:89-107. [PMID: 38495444 PMCID: PMC10937895 DOI: 10.1007/s12551-023-01174-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 11/29/2023] [Indexed: 03/19/2024] Open
Abstract
I review recent technological advancements in coupling single-cell transcriptomics with cellular phenotypes including morphology, calcium signaling, and electrophysiology. Single-cell RNA sequencing (scRNAseq) has revolutionized cell type classifications by capturing the transcriptional diversity of cells. A new wave of methods to integrate scRNAseq and biophysical measurements is facilitating the linkage of transcriptomic data to cellular function, which provides physiological insight into cellular states. I briefly discuss critical factors of these phenotypical characterizations such as timescales, information content, and analytical tools. Dedicated sections focus on the integration with cell morphology, calcium imaging, and electrophysiology (patch-seq), emphasizing their complementary roles. I discuss their application in elucidating cellular states, refining cell type classifications, and uncovering functional differences in cell subtypes. To illustrate the practical applications and benefits of these methods, I highlight their use in tissues with excitable cell-types such as the brain, pancreatic islets, and the retina. The potential of combining functional phenotyping with spatial transcriptomics for a detailed mapping of cell phenotypes in situ is explored. Finally, I discuss open questions and future perspectives, emphasizing the need for a shift towards broader accessibility through increased throughput.
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Affiliation(s)
- Joan Camunas-Soler
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, University of Gothenburg, 405 30 Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden
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3
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Zhang H, Fang J, Dai Y, Pan Y, Chu K, Smith ZJ. Rapid Intracellular Detection and Analysis of Lipid Droplets' Morpho-Chemical Composition by Phase-Guided Raman Sampling. Anal Chem 2023; 95:13555-13565. [PMID: 37650651 DOI: 10.1021/acs.analchem.3c02181] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Intracellular lipid droplets (LDs) are dynamic, complex organelles involved in nearly all aspects of cellular metabolism. In situ characterization methods are primarily limited to fluorescence imaging, which yields limited chemical information, or Raman spectroscopy, which provides excellent chemical profiling but very low throughput. Here, we propose a new paradigm where locations of both large and small droplets are obtained automatically from high-resolution phase images and fed into a galvomirror-controlled Raman sampling arm to obtain the full spectrum of each LD efficiently. Using this phase-guided Raman sampling, we can characterize hundreds of LDs within a single cell in minutes and easily acquire more than 40,000 high-quality spectra. The data set revealed strong, cell line-dependent, cell-dependent, and individual droplet-dependent composition changes to various culture conditions. In particular, we revealed a strong competitive relationship between mono- and polyunsaturated fatty acids, where supplementation with one led to a relative decrease in the other.
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Affiliation(s)
- Hao Zhang
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jingde Fang
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yichuan Dai
- Department of Advanced Manufacturing, Nanchang University, Nanchang, Jiangxi 330027, China
| | - Yang Pan
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Kaiqin Chu
- University of Science and Technology of China, Suzhou Institute for Advanced Research, Suzhou, Jiangsu 215123, China
| | - Zachary J Smith
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, China
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4
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Jia H, Yue S. Stimulated Raman Scattering Imaging Sheds New Light on Lipid Droplet Biology. J Phys Chem B 2023; 127:2381-2394. [PMID: 36897936 PMCID: PMC10042165 DOI: 10.1021/acs.jpcb.3c00038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/05/2023] [Indexed: 03/11/2023]
Abstract
A lipid droplet (LD) is a dynamic organelle closely associated with cellular functions and energy homeostasis. Dysregulated LD biology underlies an increasing number of human diseases, including metabolic disease, cancer, and neurodegenerative disorder. Commonly used lipid staining and analytical tools have difficulty providing the information regarding LD distribution and composition at the same time. To address this problem, stimulated Raman scattering (SRS) microscopy uses the intrinsic chemical contrast of biomolecules to achieve both direct visualization of LD dynamics and quantitative analysis of LD composition with high molecular selectivity at the subcellular level. Recent developments of Raman tags have further enhanced sensitivity and specificity of SRS imaging without perturbing molecular activity. With these advantages, SRS microscopy has offered great promise for deciphering LD metabolism in single live cells. This article overviews and discusses the latest applications of SRS microscopy as an emerging platform to dissect LD biology in health and disease.
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Affiliation(s)
- Hao Jia
- Key Laboratory of Biomechanics and
Mechanobiology (Beihang University), Ministry of Education, Institute
of Medical Photonics, Beijing Advanced Innovation Center for Biomedical
Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
| | - Shuhua Yue
- Key Laboratory of Biomechanics and
Mechanobiology (Beihang University), Ministry of Education, Institute
of Medical Photonics, Beijing Advanced Innovation Center for Biomedical
Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
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5
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Amarasinghe I, Phillips W, Hill AF, Cheng L, Helbig KJ, Willms E, Monson EA. Cellular communication through extracellular vesicles and lipid droplets. JOURNAL OF EXTRACELLULAR BIOLOGY 2023; 2:e77. [PMID: 38938415 PMCID: PMC11080893 DOI: 10.1002/jex2.77] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/06/2023] [Accepted: 02/15/2023] [Indexed: 06/29/2024]
Abstract
Cellular communication is essential for effective coordination of biological processes. One major form of intercellular communication occurs via the release of extracellular vesicles (EVs). These vesicles mediate intercellular communication through the transfer of their cargo and are actively explored for their role in various diseases and their potential therapeutic and diagnostic applications. Conversely, lipid droplets (LDs) are vesicles that transfer cargo within cells. Lipid droplets play roles in various diseases and evidence for their ability to transfer cargo between cells is emerging. To date, there has been little interdisciplinary research looking at the similarities and interactions between these two classes of small lipid vesicles. This review will compare the commonalities and differences between EVs and LDs including their biogenesis and secretion, isolation and characterisation methodologies, composition, and general heterogeneity and discuss challenges and opportunities in both fields.
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Affiliation(s)
- Irumi Amarasinghe
- School of Agriculture, Biomedicine and EnvironmentLa Trobe UniversityMelbourneAustralia
| | - William Phillips
- School of Agriculture, Biomedicine and EnvironmentLa Trobe UniversityMelbourneAustralia
- La Trobe Institute for Molecular SciencesLa Trobe UniversityMelbourneAustralia
| | - Andrew F. Hill
- Institute for Health and SportVictoria UniversityFootscrayVictoriaAustralia
| | - Lesley Cheng
- School of Agriculture, Biomedicine and EnvironmentLa Trobe UniversityMelbourneAustralia
- La Trobe Institute for Molecular SciencesLa Trobe UniversityMelbourneAustralia
| | - Karla J. Helbig
- School of Agriculture, Biomedicine and EnvironmentLa Trobe UniversityMelbourneAustralia
| | - Eduard Willms
- School of Agriculture, Biomedicine and EnvironmentLa Trobe UniversityMelbourneAustralia
- La Trobe Institute for Molecular SciencesLa Trobe UniversityMelbourneAustralia
| | - Ebony A. Monson
- School of Agriculture, Biomedicine and EnvironmentLa Trobe UniversityMelbourneAustralia
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6
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Zhang X, Dorlhiac G, Landry MP, Streets A. Phototoxic effects of nonlinear optical microscopy on cell cycle, oxidative states, and gene expression. Sci Rep 2022; 12:18796. [PMID: 36335145 PMCID: PMC9637160 DOI: 10.1038/s41598-022-23054-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 10/25/2022] [Indexed: 11/07/2022] Open
Abstract
Nonlinear optical imaging modalities, such as stimulated Raman scattering (SRS) microscopy, use pulsed-laser excitation with high peak intensity that can perturb the native state of cells. In this study, we used bulk RNA sequencing, quantitative measurement of cell proliferation, and fluorescent measurement of the generation of reactive oxygen species to assess phototoxic effects of near-IR pulsed laser radiation, at different time scales, for laser excitation settings relevant to SRS imaging. We define a range of laser excitation settings for which there was no significant change in mouse Neuro2A cells after laser exposure. This study provides guidance for imaging parameters that minimize photo-induced perturbations in SRS microscopy to ensure accurate interpretation of experiments with time-lapse imaging or with paired measurements of imaging and sequencing on the same cells.
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Affiliation(s)
- Xinyi Zhang
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA, USA
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Gabriel Dorlhiac
- Biophysics Graduate Group, University of California, Berkeley, Berkeley, CA, USA
| | - Markita P Landry
- Biophysics Graduate Group, University of California, Berkeley, Berkeley, CA, USA
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA, USA
- Chan-Zuckerberg Biohub, San Francisco, CA, USA
| | - Aaron Streets
- Department of Bioengineering, University of California, Berkeley, Berkeley, CA, USA.
- Biophysics Graduate Group, University of California, Berkeley, Berkeley, CA, USA.
- Chan-Zuckerberg Biohub, San Francisco, CA, USA.
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7
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Yuan Y, Lu F. A Flexible Chamber for Time-Lapse Live-Cell Imaging with Stimulated Raman Scattering Microscopy. J Vis Exp 2022:10.3791/64449. [PMID: 36121285 PMCID: PMC9631341 DOI: 10.3791/64449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2024] Open
Abstract
Stimulated Raman scattering (SRS) microscopy is a label-free chemical imaging technology. Live-cell imaging with SRS has been demonstrated for many biological and biomedical applications. However, long-term time-lapse SRS imaging of live cells has not been widely adopted. SRS microscopy often uses a high numerical aperture (NA) water-immersion objective and a high NA oil-immersion condenser to achieve high-resolution imaging. In this case, the gap between the objective and the condenser is only a few millimeters. Therefore, most commercial stage-top environmental chambers cannot be used for SRS imaging because of their large thickness with a rigid glass cover. This paper describes the design and fabrication of a flexible chamber that can be used for time-lapse live-cell imaging with transmitted SRS signal detection on an upright microscope frame. The flexibility of the chamber is achieved by using a soft material - a thin natural rubber film. The new enclosure and chamber design can be easily added to an existing SRS imaging setup. The testing and preliminary results demonstrate that the flexible chamber system enables stable, long-term, time-lapse SRS imaging of live cells, which can be used for various bioimaging applications in the future.
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Affiliation(s)
- Yuhao Yuan
- Department of Biomedical Engineering, Binghamton University, State University of New York
| | - Fake Lu
- Department of Biomedical Engineering, Binghamton University, State University of New York;
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8
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Manifold B, Fu D. Quantitative Stimulated Raman Scattering Microscopy: Promises and Pitfalls. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2022; 15:269-289. [PMID: 35300525 PMCID: PMC10083020 DOI: 10.1146/annurev-anchem-061020-015110] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Since its first demonstration, stimulated Raman scattering (SRS) microscopy has become a powerful chemical imaging tool that shows promise in numerous biological and biomedical applications. The spectroscopic capability of SRS enables identification and tracking of specific molecules or classes of molecules, often without labeling. SRS microscopy also has the hallmark advantage of signal strength that is directly proportional to molecular concentration, allowing for in situ quantitative analysis of chemical composition of heterogeneous samples with submicron spatial resolution and subminute temporal resolution. However, it is important to recognize that quantification through SRS microscopy requires assumptions regarding both system and sample. Such assumptions are often taken axiomatically, which may lead to erroneous conclusions without proper validation. In this review, we focus on the tacitly accepted, yet complex, quantitative aspect of SRS microscopy. We discuss the various approaches to quantitative analysis, examples of such approaches, challenges in different systems, and potential solutions. Through our examination of published literature, we conclude that a scrupulous approach to experimental design can further expand the powerful and incisive quantitative capabilities of SRS microscopy.
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Affiliation(s)
- Bryce Manifold
- Department of Chemistry, University of Washington, Seattle, Washington, USA;
| | - Dan Fu
- Department of Chemistry, University of Washington, Seattle, Washington, USA;
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9
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Brzozowski K, Matuszyk E, Pieczara A, Firlej J, Nowakowska AM, Baranska M. Stimulated Raman scattering microscopy in chemistry and life science - Development, innovation, perspectives. Biotechnol Adv 2022; 60:108003. [PMID: 35690271 DOI: 10.1016/j.biotechadv.2022.108003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 06/02/2022] [Accepted: 06/03/2022] [Indexed: 11/30/2022]
Abstract
In this review, we present a summary of the basics of the Stimulated Raman Scattering (SRS) phenomenon, methods of detecting the signal, and collection of the SRS images. We demonstrate the advantages of SRS imaging, and recent developments, but also the limitations, especially in image capture speeds and spatial resolution. We also compare the use of SRS microscopy in biological system studies with other techniques such as fluorescence microscopy, second-harmonic generation (SHG)-based microscopy, coherent anti-Stokes Raman scattering (CARS), and spontaneous Raman, and we show the compatibility of SRS-based systems with other discussed methods. The review is also focused on indicating innovations in SRS microscopy, on the background of which we present the layout and performance of our homemade setup built from commercially available elements enabling for imaging of the molecular structure of single cells over the spectral range of 800-3600 cm-1. Methods of image analysis are discussed, including machine learning methods for obtaining images of the distribution of selected molecules and for the detection of pathological lesions in tissues or malignant cells in the context of clinical diagnosis of a wide range of diseases with the use of SRS microscopy. Finally, perspectives for the development of SRS microscopy are proposed.
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Affiliation(s)
- K Brzozowski
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387 Krakow, Poland
| | - E Matuszyk
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348 Krakow, Poland
| | - A Pieczara
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348 Krakow, Poland
| | - J Firlej
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387 Krakow, Poland
| | - A M Nowakowska
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387 Krakow, Poland
| | - M Baranska
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387 Krakow, Poland; Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348 Krakow, Poland.
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10
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Sun A, Ji Y, Li Y, Xie W, Liu Z, Li T, Jin T, Qi W, Li K, Wu C, Xi L. Multicolor Photoacoustic Volumetric Imaging of Subcellular Structures. ACS NANO 2022; 16:3231-3238. [PMID: 35080378 DOI: 10.1021/acsnano.1c11103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Photoacoustic imaging (PAI) has been widely used in multiscale and multicontrast imaging of biological structures and functions. Optical resolution photoacoustic microscopy (OR-PAM), an emerging submodality of PAI, features high lateral resolution and rich optical contrast, indicating great potential in visualizing cellular and subcellular structures. However, three-dimensional (3D) imaging of subcellular structures using OR-PAM has remained a challenge due to the limited axial resolution. In this study, we propose a multicolor 3D photoacoustic microscopy with high lateral/axial resolutions of 0.42/2 and 0.5/2.5 μm at 532 and 780 nm excitation, respectively. Owing to the significantly increased axial resolution, we could visualize the volumetric subcellular structures of melanoma cells using intrinsic contrast. In addition, we carried out multicolor imaging of labeled microtubules/clathrin-coated pits (CCP) and microtubules/mitochondria, respectively, with one scanning by using two different excitation wavelengths. The internal connections between different subcellular structures are revealed by quantitatively comparing the spatial distributions of microtubules/CCP and microtubules/mitochondria in a single cell. Current results suggest that the proposed OR-PAM may serve as an efficient tool for subcellular and cytophysiological studies.
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Affiliation(s)
- Aihui Sun
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yaoyao Ji
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yaxi Li
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Wenhui Xie
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhihe Liu
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Tingting Li
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Tian Jin
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Weizhi Qi
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Kai Li
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Changfeng Wu
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Lei Xi
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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11
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Zhou P, He H, Ma H, Wang S, Hu S. A Review of Optical Imaging Technologies for Microfluidics. MICROMACHINES 2022; 13:mi13020274. [PMID: 35208397 PMCID: PMC8877635 DOI: 10.3390/mi13020274] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/07/2022] [Accepted: 01/11/2022] [Indexed: 12/15/2022]
Abstract
Microfluidics can precisely control and manipulate micro-scale fluids, and are also known as lab-on-a-chip or micro total analysis systems. Microfluidics have huge application potential in biology, chemistry, and medicine, among other fields. Coupled with a suitable detection system, the detection and analysis of small-volume and low-concentration samples can be completed. This paper reviews an optical imaging system combined with microfluidics, including bright-field microscopy, chemiluminescence imaging, spectrum-based microscopy imaging, and fluorescence-based microscopy imaging. At the end of the article, we summarize the advantages and disadvantages of each imaging technology.
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Affiliation(s)
- Pan Zhou
- School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528225, China;
- Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528225, China;
| | - Haipeng He
- Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528225, China;
| | - Hanbin Ma
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China;
- Guangdong ACXEL Micro & Nano Tech Co., Ltd., Foshan 528000, China
| | - Shurong Wang
- Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528225, China;
- Correspondence: (S.W.); (S.H.)
| | - Siyi Hu
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China;
- Correspondence: (S.W.); (S.H.)
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12
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Sun A, Li T, Jin T, Li Y, Li K, Song C, Xi L. Acoustic Standing Wave Aided Multiparametric Photoacoustic Imaging Flow Cytometry. Anal Chem 2021; 93:14820-14827. [PMID: 34714062 DOI: 10.1021/acs.analchem.1c03713] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Photoacoustic imaging reveals great potential for the study of individual cells due to the rich imaging contrast for both label-free and labeled cells. However, previously reported photoacoustic imaging flow cytometry configuration suffers from inadequate imaging quality and challenge to distinguish multiple cells. In order to solve such issues, we propose a novel acoustic standing wave aided multiparametric photoacoustic imaging flow cytometry (MPAFC) system. The acoustic standing wave is introduced to improve the imaging quality and speed. Multispectral illumination along with cell geometry, photoacoustic amplitude, and acoustic frequency spectrum enables the proposed system to precisely identify multiple types of cells with one scanning. On the basis of the identification, elimination of melanoma cells, and targeted labeled glioma cells have been performed with an elimination efficiency of >95%. Additionally, the MPAFC system is able to image and capture melanoma cells at a lowest concentration of 100 cells mL-1 in pure blood. Current results suggest that the proposed MPAFC may provide a precise and efficient tool for cell detection, manipulation, and elimination in both fundamental and clinical studies.
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Affiliation(s)
- Aihui Sun
- Harbin Institute of Technology, Harbin 150001, P. R. China.,Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Tingting Li
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Tian Jin
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Yaxi Li
- Harbin Institute of Technology, Harbin 150001, P. R. China.,Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Kai Li
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Chaolong Song
- School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan, 430074, P. R. China
| | - Lei Xi
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
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13
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Lima C, Muhamadali H, Goodacre R. The Role of Raman Spectroscopy Within Quantitative Metabolomics. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2021; 14:323-345. [PMID: 33826853 DOI: 10.1146/annurev-anchem-091420-092323] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ninety-four years have passed since the discovery of the Raman effect, and there are currently more than 25 different types of Raman-based techniques. The past two decades have witnessed the blossoming of Raman spectroscopy as a powerful physicochemical technique with broad applications within the life sciences. In this review, we critique the use of Raman spectroscopy as a tool for quantitative metabolomics. We overview recent developments of Raman spectroscopy for identification and quantification of disease biomarkers in liquid biopsies, with a focus on the recent advances within surface-enhanced Raman scattering-based methods. Ultimately, we discuss the applications of imaging modalities based on Raman scattering as label-free methods to study the abundance and distribution of biomolecules in cells and tissues, including mammalian, algal, and bacterial cells.
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Affiliation(s)
- Cassio Lima
- Department of Biochemistry and Systems Biology, Institute of Systems, Molecular, and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom;
| | - Howbeer Muhamadali
- Department of Biochemistry and Systems Biology, Institute of Systems, Molecular, and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom;
| | - Royston Goodacre
- Department of Biochemistry and Systems Biology, Institute of Systems, Molecular, and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom;
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14
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Jayan H, Pu H, Sun DW. Recent developments in Raman spectral analysis of microbial single cells: Techniques and applications. Crit Rev Food Sci Nutr 2021; 62:4294-4308. [PMID: 34251940 DOI: 10.1080/10408398.2021.1945534] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The conventional microbial cell analyses are mostly population-averaged methods that conceal the characteristics of single-cell in the community. Single-cell analysis can provide information on the functional and structural variation of each cell, resulting in the elimination of long and tedious microbial cultivation techniques. Raman spectroscopy is a label-free, noninvasive, and in-vivo method ideal for single-cell measurement to obtain spatially resolved chemical information. In the current review, recent developments in Raman spectroscopic techniques for microbial characterization at the single-cell level are presented, focusing on Raman imaging of single cells to study the intracellular distribution of different components. The review also discusses the limitation and challenges of each technique and put forward some future outlook for improving Raman spectroscopy-based techniques for single-cell analysis. Raman spectroscopic methods at the single-cell level have potential in precision measurements, metabolic analysis, antibiotic susceptibility testing, resuscitation capability, and correlating phenotypic information to genomics for cells, the integration of Raman spectroscopy with other techniques such as microfluidics, stable isotope probing (SIP), and atomic force microscope can further improve the resolution and provide extensive information. Future focuses should be given to advance algorithms for data analysis, standardized reference libraries, and automated cell isolation techniques in future.
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Affiliation(s)
- Heera Jayan
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China.,Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510641, China.,Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, and Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Hongbin Pu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China.,Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510641, China.,Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, and Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China.,Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510641, China.,Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, and Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China.,Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Dublin 4, Ireland
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15
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Chen T, Yavuz A, Wang MC. Dissecting lipid droplet biology with coherent Raman scattering microscopy. J Cell Sci 2021; 135:261811. [PMID: 33975358 DOI: 10.1242/jcs.252353] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Lipid droplets (LDs) are lipid-rich organelles universally found in most cells. They serve as a key energy reservoir, actively participate in signal transduction and dynamically communicate with other organelles. LD dysfunction has been associated with a variety of diseases. The content level, composition and mobility of LDs are crucial for their physiological and pathological functions, and these different parameters of LDs are subject to regulation by genetic factors and environmental inputs. Coherent Raman scattering (CRS) microscopy utilizes optical nonlinear processes to probe the intrinsic chemical bond vibration, offering label-free, quantitative imaging of lipids in vivo with high chemical specificity and spatiotemporal resolution. In this Review, we provide an overview over the principle of CRS microscopy and its application in tracking different parameters of LDs in live cells and organisms. We also discuss the use of CRS microscopy in genetic screens to discover lipid regulatory mechanisms and in understanding disease-related lipid pathology.
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Affiliation(s)
- Tao Chen
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ahmet Yavuz
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA
| | - Meng C Wang
- Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.,Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA
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16
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Chen TN, Gupta A, Zalavadia MD, Streets A. μCB-seq: microfluidic cell barcoding and sequencing for high-resolution imaging and sequencing of single cells. LAB ON A CHIP 2020; 20:3899-3913. [PMID: 32931539 PMCID: PMC8256654 DOI: 10.1039/d0lc00169d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Single-cell RNA sequencing (scRNA-seq) enables the investigation of complex biological processes in multicellular organisms with high resolution. However, many phenotypic features that are critical to understanding the functional role of cells in a heterogeneous tissue or organ are not directly encoded in the genome and therefore cannot be profiled with scRNA-seq. Quantitative optical microscopy has long been a powerful approach for characterizing diverse cellular phenotypes including cell morphology, protein localization, and chemical composition. Combining scRNA-seq with optical imaging has the potential to provide comprehensive single-cell analysis, allowing for functional integration of gene expression profiling and cell-state characterization. However, it is difficult to track single cells through both measurements; therefore, coupling current scRNA-seq protocols with optical measurements remains a challenge. Here, we report microfluidic cell barcoding and sequencing (μCB-seq), a microfluidic platform that combines high-resolution imaging and sequencing of single cells. μCB-seq is enabled by a novel fabrication method that preloads primers with known barcode sequences inside addressable reaction chambers of a microfluidic device. In addition to enabling multi-modal single-cell analysis, μCB-seq improves gene detection sensitivity, providing a scalable and accurate method for information-rich characterization of single cells.
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Affiliation(s)
- Tyler N Chen
- University of California, Berkeley, Department of Bioengineering, Berkeley, CA 94720, USA.
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17
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Azemtsop Matanfack G, Rüger J, Stiebing C, Schmitt M, Popp J. Imaging the invisible-Bioorthogonal Raman probes for imaging of cells and tissues. JOURNAL OF BIOPHOTONICS 2020; 13:e202000129. [PMID: 32475014 DOI: 10.1002/jbio.202000129] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/09/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
A revolutionary avenue for vibrational imaging with super-multiplexing capability can be seen in the recent development of Raman-active bioortogonal tags or labels. These tags and isotopic labels represent groups of chemically inert and small modifications, which can be introduced to any biomolecule of interest and then supplied to single cells or entire organisms. Recent developments in the field of spontaneous Raman spectroscopy and stimulated Raman spectroscopy in combination with targeted imaging of biomolecules within living systems are the main focus of this review. After having introduced common strategies for bioorthogonal labeling, we present applications thereof for profiling of resistance patterns in bacterial cells, investigations of pharmaceutical drug-cell interactions in eukaryotic cells and cancer diagnosis in whole tissue samples. Ultimately, this approach proves to be a flexible and robust tool for in vivo imaging on several length scales and provides comparable information as fluorescence-based imaging without the need of bulky fluorescent tags.
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Affiliation(s)
- Georgette Azemtsop Matanfack
- Institute of Physical Chemistry and Abbe Center of Photonics (IPC), Friedrich-Schiller-University Jena, Jena, Germany
- Leibniz Institute of Photonic Technology - a member of the Leibniz Research Alliance Leibniz Health Technology (Leibniz-IPHT), Jena, Germany
- Research Campus Infectognostics e.V., Jena, Germany
| | - Jan Rüger
- Leibniz Institute of Photonic Technology - a member of the Leibniz Research Alliance Leibniz Health Technology (Leibniz-IPHT), Jena, Germany
| | - Clara Stiebing
- Leibniz Institute of Photonic Technology - a member of the Leibniz Research Alliance Leibniz Health Technology (Leibniz-IPHT), Jena, Germany
| | - Michael Schmitt
- Institute of Physical Chemistry and Abbe Center of Photonics (IPC), Friedrich-Schiller-University Jena, Jena, Germany
- Leibniz Institute of Photonic Technology - a member of the Leibniz Research Alliance Leibniz Health Technology (Leibniz-IPHT), Jena, Germany
- Research Campus Infectognostics e.V., Jena, Germany
| | - Jürgen Popp
- Institute of Physical Chemistry and Abbe Center of Photonics (IPC), Friedrich-Schiller-University Jena, Jena, Germany
- Leibniz Institute of Photonic Technology - a member of the Leibniz Research Alliance Leibniz Health Technology (Leibniz-IPHT), Jena, Germany
- Research Campus Infectognostics e.V., Jena, Germany
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18
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Xu T, Gong Y, Su X, Zhu P, Dai J, Xu J, Ma B. Phenome-Genome Profiling of Single Bacterial Cell by Raman-Activated Gravity-Driven Encapsulation and Sequencing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001172. [PMID: 32519499 DOI: 10.1002/smll.202001172] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 05/01/2020] [Indexed: 06/11/2023]
Abstract
The small size and low DNA amount of bacterial cells have hindered establishing phenome-genome links in a precisely indexed, one-cell-per-reaction manner. Here, Raman-Activated Gravity-driven single-cell Encapsulation and Sequencing (RAGE-Seq) is presented, where individual cells are phenotypically screened via single-cell Raman spectra (SCRS) in an aquatic, vitality-preserving environment, then the cell with targeted SCRS is precisely packaged in a picoliter microdroplet and readily exported in a precisely indexed, "one-cell-one-tube" manner. Such integration of microdroplet encapsulation to Raman-activated sorting ensures high-coverage one-cell genome sequencing or cultivation that is directly linked to metabolic phenotype. For clinical Escherichia coli isolates, genome assemblies derived from precisely one cell via RAGE-Seq consistently reach >95% coverage. Moreover, directly from a urine sample of urogenital tract infection, metabolic-activity-based antimicrobial susceptibility phenotypes and genome sequence of 99.5% coverage are obtained simultaneously from precisely one cell. This single-cell global mutation map corroborates resistance phenotype and genotype, and unveils epidemiological features with high specificity and sensitivity. The ability to profile and correlate bacterial metabolic phenome and high-quality genome sequences at one-cell resolution suggests broad application of RAGE-Seq.
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Affiliation(s)
- Teng Xu
- Single-Cell Center, CAS Key Laboratory of Biofuels, Shandong Key Laboratory of Energy Genetics and Shandong Institute of Energy Research, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanhai Gong
- Single-Cell Center, CAS Key Laboratory of Biofuels, Shandong Key Laboratory of Energy Genetics and Shandong Institute of Energy Research, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China
| | - Xiaolu Su
- Single-Cell Center, CAS Key Laboratory of Biofuels, Shandong Key Laboratory of Energy Genetics and Shandong Institute of Energy Research, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China
| | - Pengfei Zhu
- Single-Cell Center, CAS Key Laboratory of Biofuels, Shandong Key Laboratory of Energy Genetics and Shandong Institute of Energy Research, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China
| | - Jing Dai
- Single-Cell Center, CAS Key Laboratory of Biofuels, Shandong Key Laboratory of Energy Genetics and Shandong Institute of Energy Research, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China
| | - Jian Xu
- Single-Cell Center, CAS Key Laboratory of Biofuels, Shandong Key Laboratory of Energy Genetics and Shandong Institute of Energy Research, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China
| | - Bo Ma
- Single-Cell Center, CAS Key Laboratory of Biofuels, Shandong Key Laboratory of Energy Genetics and Shandong Institute of Energy Research, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China
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19
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Manipulating and studying triglyceride droplets in microfluidic devices. Biochimie 2019; 169:88-94. [PMID: 31881257 DOI: 10.1016/j.biochi.2019.12.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 12/20/2019] [Indexed: 02/07/2023]
Abstract
Triglyceride is the main lipid class in nature, found as droplets in both living systems and man-made products (such as manufactured foods and drugs). Characterizing triglyceride droplets in situ in these systems is complex due to many environmental interactions. To answer basic research questions about droplet formation, structuration, stability, or degradation, microfluidic strategies were developed, allowing well-controlled droplets to be formed, manipulated, and studied. In this review, these strategies are described, starting with the presentation of droplet production devices, with applications essentially related to microencapsulation and delivery, then detailing methods to monitor droplet degradation in situ and in real time, finishing with microfluidic platforms allowing the investigation of many aspects of biological lipid droplets simultaneously.
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20
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Jahn IJ, Lehniger L, Weber K, Cialla-May D, Popp J. Sample preparation for Raman microspectroscopy. PHYSICAL SCIENCES REVIEWS 2019. [DOI: 10.1515/psr-2019-0018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Abstract
Raman spectroscopy and its variants allow for the investigation of a wide range of biological and biomedical samples, i. e. tissue sections, single cells and small molecules. The obtained information is on a molecular level. By making use of databases and chemometrical approaches, the chemical composition of complex samples can also be defined. The measurement procedure is straight forward, however most often sample preparation protocols must be implemented. While pure samples, such as high purity powders or highly concentrated chemicals in aqueous solutions, can be directly measured without any prior sample purification step, samples of biological origin, such as tissue sections, pathogens in suspension or biofluids, food and beverages often require pre-processing steps prior to Raman measurements. In this book chapter, different strategies for handling and processing various sample matrices for a subsequent Raman microspectroscopic analysis were introduced illustrating the high potential of this promising technique for life science and medical applications. The presented methods range from standalone techniques, such as filtration, centrifugation or immunocapture to innovative platform approaches which will be exemplary addressed. Therefore, the reader will be introduced to methods that will simplify the complexity of the matrix in which the targeted molecular species are present allowing direct Raman measurements with bench top or portable setups.
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Affiliation(s)
- I. J. Jahn
- Friedrich Schiller University Jena , Institute of Physical Chemistry and Abbe Center of Photonics , Helmholtzweg 4 07745 Jena , Germany
- Research Campus Infectognostic , Philosophenweg 7 07743 Jena , Germany
- Leibniz Institute of Photonic Technology Jena - Member of the research alliance “Leibniz Health Technologies” , Spectroscopy and Imaging , Albert-Einstein-Str. 9 07745 Jena , Germany
| | - L. Lehniger
- Friedrich Schiller University Jena , Institute of Physical Chemistry and Abbe Center of Photonics , Helmholtzweg 4 07745 Jena , Germany
- Research Campus Infectognostic , Philosophenweg 7 07743 Jena , Germany
- Leibniz Institute of Photonic Technology Jena - Member of the research alliance “Leibniz Health Technologies” , Spectroscopy and Imaging , Albert-Einstein-Str. 9 07745 Jena , Germany
| | - K. Weber
- Friedrich Schiller University Jena , Institute of Physical Chemistry and Abbe Center of Photonics , Helmholtzweg 4 07745 Jena , Germany
- Research Campus Infectognostic , Philosophenweg 7 07743 Jena , Germany
- Leibniz Institute of Photonic Technology Jena - Member of the research alliance “Leibniz Health Technologies” , Spectroscopy and Imaging , Albert-Einstein-Str. 9 07745 Jena , Germany
| | - D. Cialla-May
- Friedrich Schiller University Jena , Institute of Physical Chemistry and Abbe Center of Photonics , Helmholtzweg 4 07745 Jena , Germany
- Research Campus Infectognostic , Philosophenweg 7 07743 Jena , Germany
- Leibniz Institute of Photonic Technology Jena - Member of the research alliance “Leibniz Health Technologies” , Spectroscopy and Imaging , Albert-Einstein-Str. 9 07745 Jena , Germany
| | - J. Popp
- Friedrich Schiller University Jena , Institute of Physical Chemistry and Abbe Center of Photonics , Helmholtzweg 4 07745 Jena , Germany
- Research Campus Infectognostic , Philosophenweg 7 07743 Jena , Germany
- Leibniz Institute of Photonic Technology Jena - Member of the research alliance “Leibniz Health Technologies” , Spectroscopy and Imaging , Albert-Einstein-Str. 9 07745 Jena , Germany
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21
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Hsieh CM, Liu PY, Chin LK, Zhang JB, Wang K, Sung KB, Ser W, Bourouina T, Leprince-Wang Y, Liu AQ. Regulation of lipid droplets in live preadipocytes using optical diffraction tomography and Raman spectroscopy. OPTICS EXPRESS 2019; 27:22994-23008. [PMID: 31510584 DOI: 10.1364/oe.27.022994] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 05/24/2019] [Indexed: 06/10/2023]
Abstract
Lipid droplets have gained strong interest in recent years to comprehend how they function and coordinate with other parts of the cell. However, it remains challenging to study the regulation of lipid droplets in live preadipocytes using conventional microscopic techniques. In this paper, we study the effects of fatty acid stimulation and cell starvation on lipid droplets using optical diffraction tomography and Raman spectroscopy by measuring size, refractive index, volume, dry mass and degree of unsaturation. The increase of fatty acids causes an increase in the number and dry mass of lipid droplets. During starvation, the number of lipid droplets increases drastically, which are released to mitochondria to release energy. Studying lipid droplets under different chemical stimulations could help us understand the regulation of lipid droplets for metabolic disorders, such as obesity and diabetes.
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Abstract
Cellular imaging is an active area of research that enables researchers to monitor cellular dynamics, as well as responses to various external stimuli (physiological stress, exogenous compounds, etc.). Stimulated Raman scattering (SRS) microscopy is one popular experimental tool used to image cells, largely because of its chemical specificity, high spatial resolution, and high image acquisition speed. In this Perspective, the theoretical background and experimental implementation of SRS microscopy are discussed and recent developments in the field of cellular imaging with SRS are highlighted and summarized.
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Affiliation(s)
- Andrew H Hill
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Dan Fu
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
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Zhao Y, Chen Z, Wu Y, Tsukui T, Ma X, Zhang X, Chiba H, Hui SP. Separating and Profiling Phosphatidylcholines and Triglycerides from Single Cellular Lipid Droplet by In-Tip Solvent Microextraction Mass Spectrometry. Anal Chem 2019; 91:4466-4471. [PMID: 30773008 DOI: 10.1021/acs.analchem.8b05122] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The analysis of lipid droplets (LDs) by mass spectrometry at the single LD level is still an analytical challenge. In this work, we developed a novel technique termed in-tip solvent microextraction mass spectrometry for the separation and profiling of phosphatidylcholines and triglycerides within a single LD. This method has been successfully used to analyze LDs in mammalian cells and to compare the profiles of triglycerides and phosphatidylcholines in LDs induced at different conditions. Our method has the potential to be applied to such fields as fundamental lipid biology to further our understanding on the mechanisms of lipid production, lipid packaging, and their pathophysiological roles.
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Affiliation(s)
- Yaoyao Zhao
- Graduate School of Health Science , Hokkaido University , Sapporo 060-0812 , Japan
| | - Zhen Chen
- Graduate School of Health Science , Hokkaido University , Sapporo 060-0812 , Japan
| | - Yue Wu
- Graduate School of Health Science , Hokkaido University , Sapporo 060-0812 , Japan
| | - Takayuki Tsukui
- Department of Nutrition , Sapporo University of Health Sciences , Sapporo 007-0894 , Japan
| | - Xiaoxiao Ma
- Department of Precision Instrument , Tsinghua University , Beijing 100084 , P.R. China
| | - Xinrong Zhang
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Department of Chemistry , Tsinghua University , Beijing 100084 , P.R. China
| | - Hitoshi Chiba
- Department of Nutrition , Sapporo University of Health Sciences , Sapporo 007-0894 , Japan
| | - Shu-Ping Hui
- Graduate School of Health Science , Hokkaido University , Sapporo 060-0812 , Japan
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Abstract
The combination of next generation sequencing (NGS) and automated liquid handling platforms has led to a revolution in single-cell genomic studies. However, many molecules that are critical to understanding the functional roles of cells in a complex tissue or organs, are not directly encoded in the genome, and therefore cannot be profiled with NGS. Lipids, for example, play a critical role in many metabolic processes but cannot be detected by sequencing. Recent developments in quantitative imaging, particularly coherent Raman scattering (CRS) techniques, have produced a suite of tools for studying lipid content in single cells. This article reviews CRS imaging and computational image processing techniques for non-destructive profiling of dynamic changes in lipid composition and spatial distribution at the single-cell level. As quantitative CRS imaging progresses synergistically with microfluidic and microscopic platforms for single-cell genomic analysis, we anticipate that these techniques will bring researchers closer towards combined lipidomic and genomic analysis.
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Affiliation(s)
- Anushka Gupta
- UC Berkeley-UC San Francisco Graduate Program in Bioengineering, University of California, Berkeley Graduate Division, Berkeley, California, USA.
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25
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Affiliation(s)
- Gongchen Sun
- School of Chemical & Biomolecular Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Hang Lu
- School of Chemical & Biomolecular Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
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26
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Zhai Z, Nie M, Guan Y, Zhang F, Chen L, Du W, Liu G, Tian Y, Huang Q. A microfluidic surface-enhanced Raman spectroscopy approach for assessing the particle number effect of AgNPs on cytotoxicity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 162:529-535. [PMID: 30015200 DOI: 10.1016/j.ecoenv.2018.07.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/05/2018] [Accepted: 07/07/2018] [Indexed: 06/08/2023]
Abstract
Silver nanoparticles (Ag NPs) have well-known antibacterial properties and are widely applied in various medical products and general commodities. Although many studies have addressed the toxicity of Ag NPs to mammalian cells, the direct relationship between the number of Ag NPs in living cells and the corresponding cell toxicity has not yet been explicitly demonstrated. In this work, a simple and reusable microfluidic device composed of a quartz cover slip and a glass plate with etched micro-channel and micro-wells was employed for separating and trapping single living cells. The device was silanized to render the surface hydrophobic. For simplicity, HeLa cells as the model cancer cells were used in the study, which were pipette-loaded into an array of micro wells based on dead-end filling. Surface enhanced Raman spectroscopy (SERS) was then employed to examine the living cancer cells and assessed number and distribution of Ag NPs in the cells. Combined with the cell viability assay, we therefore correlated the number of Ag NPs in the cell with the toxicity to the cell directly.
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Affiliation(s)
- Zhimin Zhai
- Key Laboratory of High Magnetic Field and IonBeam Physical Biology, Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, University of Chinese Academy of Sciences, China
| | - Mengyue Nie
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yong Guan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China
| | - Fengqiu Zhang
- Key Laboratory of High Magnetic Field and IonBeam Physical Biology, Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China; School of Physical Engineering, Zhengzhou University, Zhengzhou, China
| | - Liang Chen
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China
| | - Wenbin Du
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Gang Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China
| | - Yangchao Tian
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China
| | - Qing Huang
- Key Laboratory of High Magnetic Field and IonBeam Physical Biology, Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Institute of Technical Biology and Agriculture Engineering, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China; University of Science and Technology of China, University of Chinese Academy of Sciences, China.
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28
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Martins AS, Martins IC, Santos NC. Methods for Lipid Droplet Biophysical Characterization in Flaviviridae Infections. Front Microbiol 2018; 9:1951. [PMID: 30186265 PMCID: PMC6110928 DOI: 10.3389/fmicb.2018.01951] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 08/02/2018] [Indexed: 01/14/2023] Open
Abstract
Lipid droplets (LDs) are intracellular organelles for neutral lipid storage, originated from the endoplasmic reticulum. They play an essential role in lipid metabolism and cellular homeostasis. In fact, LDs are complex organelles, involved in many more cellular processes than those initially proposed. They have been extensively studied in the context of LD-associated pathologies. In particular, LDs have emerged as critical for virus replication and assembly. Viruses from the Flaviviridae family, namely dengue virus (DENV), hepatitis C virus (HCV), West Nile virus (WNV), and Zika virus (ZIKV), interact with LDs to usurp the host lipid metabolism for their own viral replication and pathogenesis. In general, during Flaviviridae infections it is observed an increasing number of host intracellular LDs. Several viral proteins interact with LDs during different steps of the viral life cycle. The HCV core protein and DENV capsid protein, extensively interact with LDs to regulate their replication and assembly. Detailed studies of LDs in viral infections may contribute for the development of possible inhibitors of key steps of viral replication. Here, we reviewed different techniques that can be used to characterize LDs isolated from infected or non-infected cells. Microscopy studies have been commonly used to observe LDs accumulation and localization in infected cell cultures. Fluorescent dyes, which may affect LDs directly, are widely used to probe LDs but there are also approaches that do not require the use of fluorescence, namely stimulated Raman scattering, electron and atomic force microscopy-based approaches. These three are powerful techniques to characterize LDs morphology. Raman scattering microscopy allows studying LDs in a single cell. Electron and atomic force microscopies enable a better characterization of LDs in terms of structure and interaction with other organelles. Other biophysical techniques, such as dynamic light scattering and zeta potential are also excellent to characterize LDs in terms of size in a simple and fast way and test possible LDs interaction with viral proteins. These methodologies are reviewed in detail, in the context of viral studies.
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Affiliation(s)
- Ana S Martins
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Ivo C Martins
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Nuno C Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
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Kant K, Abalde-Cela S. Surface-Enhanced Raman Scattering Spectroscopy and Microfluidics: Towards Ultrasensitive Label-Free Sensing. BIOSENSORS-BASEL 2018; 8:bios8030062. [PMID: 29966248 PMCID: PMC6163938 DOI: 10.3390/bios8030062] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 06/25/2018] [Accepted: 06/28/2018] [Indexed: 01/03/2023]
Abstract
Raman scattering and surface-enhanced Raman scattering (SERS) spectroscopy have demonstrated their potential as ultrasensitive detection techniques in the past decades. Specifically, and as a result of the flourishing of nanotechnology, SERS is nowadays one of the most powerful sensing techniques, not only because of the low detection limits that it can achieve, but also for the structural information that it offers and its capability of multiplexing. Similarly, microfluidics technology is having an increased presence not only in fundamental research, but also in the industry. The latter is because of the intrinsic characteristics of microfluidics, being automation, high-throughput, and miniaturization. However, despite miniaturization being an advantage, it comes together with the need to use ultrasensitive techniques for the interrogation of events happening in extremely small volumes. The combination of SERS with microfluidics can overcome bottlenecks present in both technologies. As a consequence, the integration of Raman and SERS in microfluidics is being investigated for the label-free biosensing of relevant research challenges.
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Affiliation(s)
- Krishna Kant
- International Iberian Nanotechnology Laboratory (INL), Avda Mestre José Veiga, 4715-310 Braga, Portugal.
| | - Sara Abalde-Cela
- International Iberian Nanotechnology Laboratory (INL), Avda Mestre José Veiga, 4715-310 Braga, Portugal.
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Chemoproteomics reveals baicalin activates hepatic CPT1 to ameliorate diet-induced obesity and hepatic steatosis. Proc Natl Acad Sci U S A 2018; 115:E5896-E5905. [PMID: 29891721 DOI: 10.1073/pnas.1801745115] [Citation(s) in RCA: 193] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Obesity and related metabolic diseases are becoming worldwide epidemics that lead to increased death rates and heavy health care costs. Effective treatment options have not been found yet. Here, based on the observation that baicalin, a flavonoid from the herbal medicine Scutellaria baicalensis, has unique antisteatosis activity, we performed quantitative chemoproteomic profiling and identified carnitine palmitoyltransferase 1 (CPT1), the controlling enzyme for fatty acid oxidation, as the key target of baicalin. The flavonoid directly activated hepatic CPT1 with isoform selectivity to accelerate the lipid influx into mitochondria for oxidation. Chronic treatment of baicalin ameliorated diet-induced obesity (DIO) and hepatic steatosis and led to systemic improvement of other metabolic disorders. Disruption of the predicted binding site of baicalin on CPT1 completely abolished the beneficial effect of the flavonoid. Our discovery of baicalin as an allosteric CPT1 activator opens new opportunities for pharmacological treatment of DIO and associated sequelae.
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31
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Sizing lipid droplets from adult and geriatric mouse liver tissue via nanoparticle tracking analysis. Anal Bioanal Chem 2018; 410:3629-3638. [PMID: 29663061 DOI: 10.1007/s00216-018-1016-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 02/23/2018] [Accepted: 03/09/2018] [Indexed: 12/24/2022]
Abstract
The significance of lipid droplets in lipid metabolism, cell signaling, and regulating longevity is increasingly recognized, yet the lipid droplet's unique properties and architecture make it difficult to size and study using conventional methods. To begin to address this issue, we demonstrate the capabilities of nanoparticle tracking analysis (NTA) for sizing of lipid droplets. NTA was found to be adequate to assess lipid droplet stability over time, indicating that lipid droplet preparations are stable for up to 24 h. NTA had the ability to compare the size distributions of lipid droplets from adult and geriatric mouse liver tissue, suggesting an age-related decrease in lipid droplet size. This is the first report on the use of NTA to size intracellular organelles. Graphical Abstract Light scattering reveals the temporal positions of individual lipid droplets, which are recorded with a camera. The two-dimensional diffusion constant of each lipid droplet is extracted from the data set, which is then used to calculate a hydrodynamic radius using the Stokes-Einstein equation.
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32
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Stiebing C, Meyer T, Rimke I, Matthäus C, Schmitt M, Lorkowski S, Popp J. Real-time Raman and SRS imaging of living human macrophages reveals cell-to-cell heterogeneity and dynamics of lipid uptake. JOURNAL OF BIOPHOTONICS 2017; 10:1217-1226. [PMID: 28164480 DOI: 10.1002/jbio.201600279] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/23/2016] [Accepted: 01/18/2017] [Indexed: 06/06/2023]
Abstract
Monitoring living cells in real-time is important in order to unravel complex dynamic processes in life sciences. In particular the dynamics of initiation and progression of degenerative diseases is intensely studied. In atherosclerosis the thickening of arterial walls is related to high lipid levels in the blood stream, which trigger the lipid uptake and formation of droplets as neutral lipid reservoirs in macrophages in the arterial wall. Unregulated lipid uptake finally results in foam cell formation, which is a hallmark of atherosclerosis. In previous studies, the uptake and storage of different fatty acids was monitored by measuring fixed cells. Commonly employed fluorescence staining protocols are often error prone because of cytotoxicity and unspecific fluorescence backgrounds. By following living cells with Raman spectroscopic imaging, lipid uptake of macrophages was studied with real-time data acquisition. Isotopic labeling using deuterated palmitic acid has been combined with spontaneous and stimulated Raman imaging to investigate the dynamic process of fatty acid storage in human macrophages for incubation times from 45 min to 37 h. Striking heterogeneity in the uptake rate and the total concentration of deuterated palmitic acid covering two orders of magnitude is detected in single as well as ensembles of cultured human macrophages. SRS signal of deuterated palmitic acid measured at the CD vibration band after incorporation into living macrophages.
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Affiliation(s)
- Clara Stiebing
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Tobias Meyer
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Ingo Rimke
- APE Angewandte Physik & Elektronik GmbH, Plauener Straße 163-165, 13053, Berlin
| | - Christian Matthäus
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Michael Schmitt
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Stefan Lorkowski
- Institute of Nutrition and Abbe Center of Photonics, Friedrich Schiller University Jena, Dornburger Straße 25, 07743, Jena, Germany
- Competence Cluster of Nutrition and Cardiovascular Health (nutriCARD), Halle-Jena-Leipzig, Friedrich Schiller University Jena, Dornburger Straße 25, 07743, Jena, Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, 07745, Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany
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33
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Quantitative chemical imaging with stimulated Raman scattering microscopy. Curr Opin Chem Biol 2017; 39:24-31. [DOI: 10.1016/j.cbpa.2017.05.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 05/02/2017] [Accepted: 05/04/2017] [Indexed: 12/14/2022]
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34
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Zhang C, Li J, Lan L, Cheng JX. Quantification of Lipid Metabolism in Living Cells through the Dynamics of Lipid Droplets Measured by Stimulated Raman Scattering Imaging. Anal Chem 2017; 89:4502-4507. [PMID: 28345862 DOI: 10.1021/acs.analchem.6b04699] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Dysregulation of lipid metabolism is associated with many diseases including cancer. Lipid droplet (LD), a ubiquitous organelle in mammalian cells, serves as a hub for lipid metabolism. Conventional assays on the measurement of lipid metabolism rely on the quantification of the lipid composition or amount. Such methods cannot distinguish LDs having different biofunctionalities in living cells, and thus could be inaccurate in measuring the instantaneous lipogenesis of the living cells. We applied label-free stimulated Raman scattering microscopy to quantify the LDs' spatial-temporal dynamics, which showed direct links to cellular lipid metabolisms and can separate LDs involved in different metabolic events. In human cancer cells, we found that changes in the maximum displacement of LDs reflected variations in cellular lipogenic activity, and changes in the average speed of LDs revealed alterations in LD size. The LD dynamics analysis allowed for more accurate measurement in the lipogenesis and LD dimensions, and can break the optical diffraction limit to detect small variation in lipid metabolism that was conventionally undetectable. By this method, we revealed changes in the lipogenic activity and LD sizes during glucose starvation of HeLa cells and transforming growth factor beta-induced epithelial-to-mesenchymal transition of SKOV-3 cells. This method opens a way to quantify lipid metabolism in living cells during cellular development and transition.
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Affiliation(s)
- Chi Zhang
- Weldon School of Biomedical Engineering, Purdue University . 206 S. Martin Jischke Drive, West Lafayette, Indiana 47906, United States
| | - Junjie Li
- Weldon School of Biomedical Engineering, Purdue University . 206 S. Martin Jischke Drive, West Lafayette, Indiana 47906, United States
| | - Lu Lan
- Weldon School of Biomedical Engineering, Purdue University . 206 S. Martin Jischke Drive, West Lafayette, Indiana 47906, United States
| | - Ji-Xin Cheng
- Weldon School of Biomedical Engineering, Purdue University . 206 S. Martin Jischke Drive, West Lafayette, Indiana 47906, United States
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35
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Krafft C, Schmitt M, Schie IW, Cialla-May D, Matthäus C, Bocklitz T, Popp J. Markerfreie molekulare Bildgebung biologischer Zellen und Gewebe durch lineare und nichtlineare Raman-spektroskopische Ansätze. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201607604] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Christoph Krafft
- Leibniz-Institut für Photonische Technologien; Albert-Einstein-Straße 9 07745 Jena Deutschland
| | - Michael Schmitt
- Institut für Physikalische Chemie und Abbe Center of Photonics; Friedrich-Schiller-Universität Jena; Helmholtzweg 4 07743 Jena Deutschland
| | - Iwan W. Schie
- Leibniz-Institut für Photonische Technologien; Albert-Einstein-Straße 9 07745 Jena Deutschland
| | - Dana Cialla-May
- Leibniz-Institut für Photonische Technologien; Albert-Einstein-Straße 9 07745 Jena Deutschland
- Institut für Physikalische Chemie und Abbe Center of Photonics; Friedrich-Schiller-Universität Jena; Helmholtzweg 4 07743 Jena Deutschland
| | - Christian Matthäus
- Leibniz-Institut für Photonische Technologien; Albert-Einstein-Straße 9 07745 Jena Deutschland
- Institut für Physikalische Chemie und Abbe Center of Photonics; Friedrich-Schiller-Universität Jena; Helmholtzweg 4 07743 Jena Deutschland
| | - Thomas Bocklitz
- Leibniz-Institut für Photonische Technologien; Albert-Einstein-Straße 9 07745 Jena Deutschland
- Institut für Physikalische Chemie und Abbe Center of Photonics; Friedrich-Schiller-Universität Jena; Helmholtzweg 4 07743 Jena Deutschland
| | - Jürgen Popp
- Leibniz-Institut für Photonische Technologien; Albert-Einstein-Straße 9 07745 Jena Deutschland
- Institut für Physikalische Chemie und Abbe Center of Photonics; Friedrich-Schiller-Universität Jena; Helmholtzweg 4 07743 Jena Deutschland
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36
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Zhang L, Shen S, Liu Z, Ji M. Label-Free, Quantitative Imaging of MoS2
-Nanosheets in Live Cells with Simultaneous Stimulated Raman Scattering and Transient Absorption Microscopy. ACTA ACUST UNITED AC 2017; 1:e1700013. [DOI: 10.1002/adbi.201700013] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/01/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Lili Zhang
- State Key Laboratory of Surface Physics and Department of Physics; Collaborative Innovation Center of Genetics and Development; School of Life Sciences; Fudan University; Shanghai 200433 China
| | - Sida Shen
- Institute of Functional Nano & Soft Materials (FUNSOM); Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou Jiangsu 215123 China
| | - Zhuang Liu
- Institute of Functional Nano & Soft Materials (FUNSOM); Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou Jiangsu 215123 China
| | - Minbiao Ji
- State Key Laboratory of Surface Physics and Department of Physics; Collaborative Innovation Center of Genetics and Development; School of Life Sciences; Fudan University; Shanghai 200433 China
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37
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Krafft C, Schmitt M, Schie IW, Cialla-May D, Matthäus C, Bocklitz T, Popp J. Label-Free Molecular Imaging of Biological Cells and Tissues by Linear and Nonlinear Raman Spectroscopic Approaches. Angew Chem Int Ed Engl 2017; 56:4392-4430. [PMID: 27862751 DOI: 10.1002/anie.201607604] [Citation(s) in RCA: 132] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 11/04/2016] [Indexed: 12/20/2022]
Abstract
Raman spectroscopy is an emerging technique in bioanalysis and imaging of biomaterials owing to its unique capability of generating spectroscopic fingerprints. Imaging cells and tissues by Raman microspectroscopy represents a nondestructive and label-free approach. All components of cells or tissues contribute to the Raman signals, giving rise to complex spectral signatures. Resonance Raman scattering and surface-enhanced Raman scattering can be used to enhance the signals and reduce the spectral complexity. Raman-active labels can be introduced to increase specificity and multimodality. In addition, nonlinear coherent Raman scattering methods offer higher sensitivities, which enable the rapid imaging of larger sampling areas. Finally, fiber-based imaging techniques pave the way towards in vivo applications of Raman spectroscopy. This Review summarizes the basic principles behind medical Raman imaging and its progress since 2012.
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Affiliation(s)
- Christoph Krafft
- Leibniz-Institut für Photonische Technologien, Albert-Einstein-Strasse 9, 07745, Jena, Germany
| | - Michael Schmitt
- Institut für Physikalische Chemie und Abbe Center für Photonics, Friedrich Schiller Universität Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Iwan W Schie
- Leibniz-Institut für Photonische Technologien, Albert-Einstein-Strasse 9, 07745, Jena, Germany
| | - Dana Cialla-May
- Leibniz-Institut für Photonische Technologien, Albert-Einstein-Strasse 9, 07745, Jena, Germany.,Institut für Physikalische Chemie und Abbe Center für Photonics, Friedrich Schiller Universität Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Christian Matthäus
- Leibniz-Institut für Photonische Technologien, Albert-Einstein-Strasse 9, 07745, Jena, Germany.,Institut für Physikalische Chemie und Abbe Center für Photonics, Friedrich Schiller Universität Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Thomas Bocklitz
- Leibniz-Institut für Photonische Technologien, Albert-Einstein-Strasse 9, 07745, Jena, Germany.,Institut für Physikalische Chemie und Abbe Center für Photonics, Friedrich Schiller Universität Jena, Helmholtzweg 4, 07743, Jena, Germany
| | - Jürgen Popp
- Leibniz-Institut für Photonische Technologien, Albert-Einstein-Strasse 9, 07745, Jena, Germany.,Institut für Physikalische Chemie und Abbe Center für Photonics, Friedrich Schiller Universität Jena, Helmholtzweg 4, 07743, Jena, Germany
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38
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Yang SH, Lee DJ, Youn JR, Song YS. Multiple-Line Particle Focusing under Viscoelastic Flow in a Microfluidic Device. Anal Chem 2017; 89:3639-3647. [DOI: 10.1021/acs.analchem.6b05052] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sei Hyun Yang
- Research
Institute of Advanced Materials (RIAM), Department of Materials Science
and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Doo Jin Lee
- Ceramic
Fiber and Composite Materials Center, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju-si, Gyeongsangnam-do, 52851, Republic of Korea
| | - Jae Ryoun Youn
- Research
Institute of Advanced Materials (RIAM), Department of Materials Science
and Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Young Seok Song
- Department
of Fiber System Engineering, Dankook University, Gyeonggi-do, 16890, Republic of Korea
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39
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He R, Liu Z, Xu Y, Huang W, Ma H, Ji M. Stimulated Raman scattering microscopy and spectroscopy with a rapid scanning optical delay line. OPTICS LETTERS 2017; 42:659-662. [PMID: 28198892 DOI: 10.1364/ol.42.000659] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Stimulated Raman scattering (SRS) microscopy that is capable of both high-speed imaging and rapid spectroscopy will be advantageous for detailed chemical analysis of heterogeneous biological specimens. We have developed a system based on spectral focusing SRS technology with the integration of a rapid scanning optical delay line, which allows continuous tuning of SRS spectra by scanning a galvo mirror. We demonstrate SRS spectral measurements of dimethyl sulfoxide solution at low concentrations and multi-color imaging of rice pollens and HeLa cells with line-by-line delay tuning to reduce motion artifacts, as well as fast acquisition of SRS spectra at specific regions of interest.
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40
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Abstract
Stimulated Raman scattering (SRS) describes a family of techniques first discovered and developed in the 1960s. Whereas the nascent history of the technique is parallel to that of laser light sources, recent advances have spurred a resurgence in its use and development that has spanned across scientific fields and spatial scales. SRS is a nonlinear technique that probes the same vibrational modes of molecules that are seen in spontaneous Raman scattering. While spontaneous Raman scattering is an incoherent technique, SRS is a coherent process, and this fact provides several advantages over conventional Raman techniques, among which are much stronger signals and the ability to time-resolve the vibrational motions. Technological improvements in pulse generation and detection strategies have allowed SRS to probe increasingly smaller volumes and shorter time scales. This has enabled SRS research to move from its original domain, of probing bulk media, to imaging biological tissues and single cells at the micro scale, and, ultimately, to characterizing samples with subdiffraction resolution at the nanoscale. In this Review, we give an overview of the history of the technique, outline its basic properties, and present historical and current uses at multiple length scales to underline the utility of SRS to the molecular sciences.
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Affiliation(s)
- Richard C Prince
- Department of Biomedical Engineering, University of California, Irvine , 1436 Natural Sciences II, Irvine, California 92697-2025, United States
| | - Renee R Frontiera
- Department of Chemistry, University of Minnesota, Minneapolis , B-18, 139 Smith Hall, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, United States
| | - Eric O Potma
- Department of Chemistry, University of California, Irvine , 1107 Natural Sciences II, Irvine, California 92697-2025, United States
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41
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Chen Z, Fu Y, Zhang F, Liu L, Zhang N, Zhou D, Yang J, Pang Y, Huang Y. Spinning micropipette liquid emulsion generator for single cell whole genome amplification. LAB ON A CHIP 2016; 16:4512-4516. [PMID: 27775138 DOI: 10.1039/c6lc01084a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Many on-chip approaches that use flow-focusing to pinch the continuous aqueous phase into droplets have become the most popular methods that provide monodisperse emulsion droplets. However, not every lab can easily adapt a microfluidic workflow into their familiar protocols. We develop an off-chip approach, spinning micro-pipette liquid emulsion (SiMPLE) generator, to produce highly stable monodisperse water-in-oil emulsions using a moving micropipette to disperse the aqueous phase in an oil-filled microcentrifuge tube. This method provides a simple way to produce picoliter-size droplets in situ with no dead volume during emulsification. With SiMPLE, single-cell emulsion whole genome amplification was performed to demonstrate that this novel method can seamlessly be integrated with experimental operations and supplies that most researchers are familiar with. The SiMPLE generator has effectively lowered the technical difficulties in applications relying on emulsion droplets.
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Affiliation(s)
- Zitian Chen
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, and College of Engineering, Peking University, Beijing, China. and Beijing Advanced Innovation Center for Genomics (ICG), Peking University, Beijing, China
| | - Yusi Fu
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, and College of Engineering, Peking University, Beijing, China. and Beijing Advanced Innovation Center for Genomics (ICG), Peking University, Beijing, China
| | - Fangli Zhang
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, and College of Engineering, Peking University, Beijing, China. and Beijing Advanced Innovation Center for Genomics (ICG), Peking University, Beijing, China
| | - Lu Liu
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, and College of Engineering, Peking University, Beijing, China. and Beijing Advanced Innovation Center for Genomics (ICG), Peking University, Beijing, China
| | - Naiqing Zhang
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, and College of Engineering, Peking University, Beijing, China.
| | - Dong Zhou
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, and College of Engineering, Peking University, Beijing, China.
| | - Junrui Yang
- School of Electronics Engineering and Computer Science, Peking University, Beijing, China
| | - Yuhong Pang
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, and College of Engineering, Peking University, Beijing, China. and Beijing Advanced Innovation Center for Genomics (ICG), Peking University, Beijing, China
| | - Yanyi Huang
- Biodynamic Optical Imaging Center (BIOPIC), School of Life Sciences, and College of Engineering, Peking University, Beijing, China. and Beijing Advanced Innovation Center for Genomics (ICG), Peking University, Beijing, China and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
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