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Expansion Microscopy for Cell Biology, Volume 161 in the Methods in Cell Biology series, compiles recent developments in expansion microscopy techniques (Pro-ExM, U-ExM, Ex-STED, X10, Ex-dSTORM, etc.) and their applications in cell biology, ranging from mitosis, centrioles or nuclear pore complex to plant cell, bacteria, Drosophila or neurons. Chapters in this new release include Protein-retention Expansion Microscopy: Improved Sub-cellular Imaging Resolution through Physical Specimen Expansion, Ultrastructure Expansion Microscopy (U-ExM), Expansion STED microscopy (ExSTED), Simple multi-color super-resolution by X10 microscopy, Expansion microscopy imaging of various neuronal structures, Mapping the neuronal cytoskeleton using expansion microscopy, Mechanical expansion microscopy, and much more. - Provides the authority and expertise of leading contributors from an international board of authors - Represents the latest release in the Methods in Cell Biology series - Includes the latest information on Expansion Microscopy for Cell Biology
Expansion microscopy is a laboratory technique that enables nanoscale imaging of biological samples with conventional light microscopes. While expansion microscopy has traditionally been applied to specimens consisting of tissue and adherent cell culture, it has not been optimized for specimens consisting of cells in suspension. In this work, a straightforward expansion microscopy protocol was developed for suspension cells. This protocol was validated across multiple cell types including in vitro and in vivo disease models, and multiple expansion microscopy versions encompassing different methods of sample fixation, anchoring, and gelation. Suspension cells imaged after conducting the protocol exhibited increased resolution compared to images of the initial raw sample, as well as a high rate of sample retention at a variety of initial concentrations. These findings suggest the potential for the wide use of expansion microscopy to study suspension cells, which provide a versatile and scalable system for investigating cellular processes and developing therapeutic treatments. The protocol created in this work can be directly used in the future to interrogate suspension cells at nanoscale resolution to identify underlying molecular and morphological mechanisms.
The go‐to resource for microscopists on biological applications of field emission gun scanning electron microscopy (FEGSEM) The evolution of scanning electron microscopy technologies and capability over the past few years has revolutionized the biological imaging capabilities of the microscope—giving it the capability to examine surface structures of cellular membranes to reveal the organization of individual proteins across a membrane bilayer and the arrangement of cell cytoskeleton at a nm scale. Most notable are their improvements for field emission scanning electron microscopy (FEGSEM), which when combined with cryo-preparation techniques, has provided insight into a wide range of biological questions including the functionality of bacteria and viruses. This full-colour, must-have book for microscopists traces the development of the biological field emission scanning electron microscopy (FEGSEM) and highlights its current value in biological research as well as its future worth. Biological Field Emission Scanning Electron Microscopy highlights the present capability of the technique and informs the wider biological science community of its application in basic biological research. Starting with the theory and history of FEGSEM, the book offers chapters covering: operation (strengths and weakness, sample selection, handling, limitations, and preparation); Commercial developments and principals from the major FEGSEM manufacturers (Thermo Scientific, JEOL, HITACHI, ZEISS, Tescan); technical developments essential to bioFEGSEM; cryobio FEGSEM; cryo-FIB; FEGSEM digital-tomography; array tomography; public health research; mammalian cells and tissues; digital challenges (image collection, storage, and automated data analysis); and more. Examines the creation of the biological field emission gun scanning electron microscopy (FEGSEM) and discusses its benefits to the biological research community and future value Provides insight into the design and development philosophy behind current instrument manufacturers Covers sample handling, applications, and key supporting techniques Focuses on the biological applications of field emission gun scanning electron microscopy (FEGSEM), covering both plant and animal research Presented in full colour An important part of the Wiley-Royal Microscopical Series, Biological Field Emission Scanning Electron Microscopy is an ideal general resource for experienced academic and industrial users of electron microscopy—specifically, those with a need to understand the application, limitations, and strengths of FEGSEM.
The study of plant cell expansion involves many different disciplines and technical approaches, and this book brings this diversity together to present a multifaceted view of the most up-to-date knowledge. Coverage includes data ranging from biophysical measurements and chemical analysis to molecular biological approaches and microscopy.
In Confocal Microscopy Methods and Protocols, Stephen Paddock and a highly skilled panel of experts lead the researcher using confocal techniques from the bench top, through the imaging process, to the journal page. They concisely describe all the key stages of confocal imaging-from tissue sampling methods, through the staining process, to the manipulation, presentation, and publication of the realized image. Written in a user-friendly, nontechnical style, the methods specifically cover most of the commonly used model organisms: worms, sea urchins, flies, plants, yeast, frogs, and zebrafish. Centered in the many biological applications of the confocal microscope, the book makes possible the successful imaging of both fixed and living specimens using primarily the laser scanning confocal microscope. The powerful hands-on methods collected in Confocal Microscopy Methods and Protocols will help even the novice to produce first-class cover-quality confocal images.
Microscopy has facilitated the discovery of many biological insights by optically magnifying small structures in cells and tissues. However, the resolution of optical microscopy is limited by the diffraction of light to ~200-300 nm, comparable or larger to the size of many subcellular structures. In this thesis, we describe a suite of tools based on a novel super-resolution microscopy approach called Expansion microscopy. Expansion microscopy (ExM) physically expands tissues so that the resolution of ordinary microscopes is increased -5 times by leveraging the swelling properties of polyelectrolyte hydrogels. Ordinary microscopes used with ExM are more accessible and faster than the specialized optical systems designed to image beyond the diffraction limit (e.g., STORM/PALM, STED, SIM), while yielding similar performance. Expanded tissues are also optically clear, allowing for unprecedented super-resolution imaging in thick tissues and facile reagent diffusion into the sample. We have since developed a variant of ExM, called protein retention ExM, in which proteins are directly anchored to the swellable gel using a commercially available cross-linking molecule. This strategy enables ExM of genetically encoded fluorescent proteins and commercial fluorescently labeled secondary antibodies. With these advancements, ExM can be carried out with purely commercial reagents and represents a simple extension of standard histological methods used to prepare samples for imaging. Furthermore, we have developed a variant of the ExM technology that enables RNA molecules to be directly linked to the ExM gel network via a small molecule linker and isotropic expansion. This technology, termed ExFISH, enables visualization of RNAs with nanoscale precision and single molecule resolution. We have demonstrated that the covalent anchoring of RNA also enables robust repeated washing and probe hybridization steps, opening the door to combinatorial multiplexing strategies. By leveraging these benefits, we have further developed in situ analysis tools which allow for highly multiplexed imaging of RNA identity and location with nanoscale precision in intact tissues. Taken together, these tools allow for spatially mapping molecular information onto cell types and tissue structures which could be invaluable for spatially complex biological processes such as brain function, cancer heterogeneity and organismal development.
This new volume, number 123, of Methods in Cell Biology looks at methods for quantitative imaging in cell biology. It covers both theoretical and practical aspects of using optical fluorescence microscopy and image analysis techniques for quantitative applications. The introductory chapters cover fundamental concepts and techniques important for obtaining accurate and precise quantitative data from imaging systems. These chapters address how choice of microscope, fluorophores, and digital detector impact the quality of quantitative data, and include step-by-step protocols for capturing and analyzing quantitative images. Common quantitative applications, including co-localization, ratiometric imaging, and counting molecules, are covered in detail. Practical chapters cover topics critical to getting the most out of your imaging system, from microscope maintenance to creating standardized samples for measuring resolution. Later chapters cover recent advances in quantitative imaging techniques, including super-resolution and light sheet microscopy. With cutting-edge material, this comprehensive collection is intended to guide researchers for years to come. Covers sections on model systems and functional studies, imaging-based approaches and emerging studies Chapters are written by experts in the field Cutting-edge material
2.6.2 Electrodes for Electrochemistry
This book describes developments in the field of super-resolution fluorescence microscopy or nanoscopy. In 11 chapters, distinguished scientists and leaders in their respective fields describe different nanoscopy approaches, various labeling technologies, and concrete applications. The topics covered include the principles and applications of the most popular nanoscopy techniques STED and (f)PALM/STORM, along with advances brought about by fluorescent proteins and organic dyes optimized for fluorescence nanoscopy. Furthermore, the photophysics of fluorescent labels is addressed, specifically for improving their photoswitching capabilities. Important applications are also discussed, such as the tracking and counting of molecules to determine acting forces in cells, and quantitative cellular imaging, respectively, as well as the mapping of chemical reaction centers at the nano-scale. The 2014 Chemistry Nobel Prize® was awarded for the ground-breaking developments of super-resolved fluorescence microscopy. In this book, which was co-edited by one of the prize winners, readers will find the most recent developments in this field.