Flow cytometric analysis of autophagy in living mammalian cells.

Abstract:

:Autophagy is a major intracellular catabolic pathway induced in response to amino acid starvation. Recent findings implicate it in diverse physiological/pathophysiological events, such as protein and organelle turnover, development, aging, pathogen infection, cell death, and neurodegeneration. However, experimental methods to monitor this process in mammalian cells are limited because of the deficiency of autophagic markers. Recently, MAP1-LC3 (LC3), a mammalian homolog of the yeast ubiquitin-like (UBL) protein Atg8, has been shown to selectively incorporate into the autophagosomal membrane, thus serving as a unique bona fide marker of autophagosomes in mammals. Thus, the autophagic activity can be largely determined by GFP-LC3/LC3, predominantly associated with autophagosomes (when LC3 is conjugated to phosphatidylethanolamine), both biochemically and microscopically. However, current methods to quantify autophagic activity using LC3 are time consuming, labor intensive, and require expertise in accurate interpretation. In this chapter we describe the use of flow cytometry and fluorescence-activated cell sorting (FACS) as a new assay designed to quantify autophagy in cells stably expressing GFP-LC3. Flow cytometry is a well-established technique for performing quantitative fluorescence measurements, allowing quick, accurate, and simultaneous determination of many parameters in cell subpopulations. Here flow cytometry and FACS were used to quantify the turnover of GFP-LC3 (reflecting an autophagic flux) as a reliable and simple assay to measure autophagic activity in living mammalian cells.

journal_name

Methods Enzymol

journal_title

Methods in enzymology

authors

Shvets E,Elazar Z

doi

10.1016/S0076-6879(08)03609-4

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

131-41

eissn

0076-6879

issn

1557-7988

pii

S0076-6879(08)03609-4

journal_volume

452

pub_type

杂志文章
  • Reannotation of Genomes by Means of Proteomics Data.

    abstract::Omics approaches have become popular in biology as powerful discovery tools, and currently gain in interest for diagnostic applications. Establishing the accurate genome sequence of any organism is easy, but the outcome of its annotation by means of automatic pipelines remains imprecise. Some protein-encoding genes ma...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2016.09.019

    authors: Armengaud J

    更新日期:2017-01-01 00:00:00

  • Pulsed EPR in the Study of Drug Binding in Cytochrome P450 and NOS.

    abstract::Pulsed EPR methods for the study of drug binding to heme-thiolate enzymes such as cytochrome P450 and nitric oxide synthase are discussed. HYSCORE and ENDOR methods to measure (1)H of axial ligands of the heme group are described with illustrations of water serving as the axial ligand in the drug-free enzyme and ligan...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2015.07.005

    authors: Cruce AA,Lockart M,Bowman MK

    更新日期:2015-01-01 00:00:00

  • Investigating Histone Acetylation Stoichiometry and Turnover Rate.

    abstract::Histone acetylation is a dynamic epigenetic modification that functions in the regulation of DNA-templated reactions, such as transcription. This lysine modification is reversibly controlled by histone (lysine) acetyltransferases and deacetylases. Here, we present methods employing isotopic labeling and mass spectrome...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2016.01.007

    authors: Fan J,Baeza J,Denu JM

    更新日期:2016-01-01 00:00:00

  • Quantitative community analysis: capillary electrophoresis techniques.

    abstract::This chapter presents methodologies for RNA extraction from soils coupled with competitive reverse transcription-polymerase chain reaction and capillary electrophoresis techniques. Combined, these approaches provide new capabilities to quantify gene expression in different environments and can aid our understanding of...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/S0076-6879(05)97019-5

    authors: Semrau JD,Han JI

    更新日期:2005-01-01 00:00:00

  • RNA interference techniques to study epithelial cell adhesion and polarity.

    abstract::Polarized epithelial cells are characterized by distinct plasma membrane domains and asymmetrical distribution of cell surface proteins and lipids. In vertebrates, tight junctions act as a fence between the apical and basolateral domains. Although many of the key components of the polarity machinery have been identifi...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/S0076-6879(06)06026-5

    authors: Chen X,Macara IG

    更新日期:2006-01-01 00:00:00

  • How to operate a cryo-electron microscope.

    abstract::We describe the basic principles for imaging frozen-hydrated specimens in a transmission electron microscope and provide a step-by-step guide to a new user, from starting up and aligning the microscope, to loading a cryo-grid into the specimen holder and inserting the holder into the microscope, to setting up the low ...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/S0076-6879(10)81010-9

    authors: Sun J,Li H

    更新日期:2010-01-01 00:00:00

  • Cell wall engineering of living bacteria through biosynthesis.

    abstract::Cell wall precursors that have been modified at their peptide moiety were incorporated into the living bacterial cell wall. Using chemically synthesized bacterial cell wall precursors, a variety of compounds could be attached to the bacterial surface. Escherichia coli took the modified precursors into the cell wall af...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/s0076-6879(03)01019-x

    authors: Sadamoto R,Niikura K,Monde K,Nishimura S

    更新日期:2003-01-01 00:00:00

  • Expression of authentic post-translationally modified proteins in organisms with expanded genetic codes.

    abstract::Cellular signaling and regulatory cascades often rely on post-translational modification of proteins, particularly phosphorylation, to quickly and effectively relay signals from a variety of inputs. Numerous kinases, the effectors of phosphorylation, and kinase networks have been implicated in human diseases. Until re...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2019.07.017

    authors: Mohler K,Rinehart J

    更新日期:2019-01-01 00:00:00

  • Purification of hematopoietic stem cells using the side population.

    abstract::Hematopoietic stem cells (HSCs) primarily reside in bone marrow, are defined by their ability to maintain blood homeostasis, and replenish themselves through self-renewal. Although HSC purification schemes vary from laboratory to laboratory, the resulting cell populations are similar, if not the same. This chapter wil...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/S0076-6879(06)20011-9

    authors: Lin KK,Goodell MA

    更新日期:2006-01-01 00:00:00

  • The emerging role of histone deacetylases (HDACs) in UPR regulation.

    abstract::Although the function of histone deacetylases (HDACs) have primarily been associated with influencing transcription through chromatin remodeling, the capacity of these enzymes to interface with a diverse array of biologic processes by modulating a growing list of nonhistone substrates has gained recent attention. Rece...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/B978-0-12-385114-7.00010-6

    authors: Kahali S,Sarcar B,Chinnaiyan P

    更新日期:2011-01-01 00:00:00

  • Measuring synchrony in the mammalian central circadian circuit.

    abstract::Circadian clocks control daily rhythms in physiology and behavior across all phyla. These rhythms are intrinsic to individual cells that must synchronize to their environment and to each other to anticipate daily events. Recent advances in recording from large numbers of cells for many circadian cycles have enabled re...

    journal_title:Methods in enzymology

    pub_type: 杂志文章,评审

    doi:10.1016/bs.mie.2014.10.042

    authors: Herzog ED,Kiss IZ,Mazuski C

    更新日期:2015-01-01 00:00:00

  • Genetic and physiological analysis of DNA replication in fission yeast.

    abstract::Studies on DNA replication in S. pombe have provided powerful insights into the way in which the genome of this model eukaryote is replicated and how the replication process is controlled. These studies have been facilitated by the simplicity and range of methods available in this organism for physiological and geneti...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/s0076-6879(97)83036-4

    authors: MacNeill SA,Fantes PA

    更新日期:1997-01-01 00:00:00

  • Affinity Purification of a Recombinant Protein Expressed as a Fusion with the Maltose-Binding Protein (MBP) Tag.

    abstract::Expression of fusion proteins such as MBP fusions can be used as a way to improve the solubility of the expressed protein in E. coli (Fox and Waugh, 2003; Nallamsetty et al., 2005; Nallamsetty and Waugh, 2006) and as a way to introduce an affinity purification tag. The protocol that follows was designed by the authors...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2014.11.004

    authors: Duong-Ly KC,Gabelli SB

    更新日期:2015-01-01 00:00:00

  • Immunofluorescence and Immunohistochemical Detection of Keratins.

    abstract::Reliable detection of keratins in tissues is important for investigating their physiological role and for using keratin expression as a biomarker in medical diagnostics. A particular challenge for the detection of keratins by immunofluorescence microscopy or immunohistochemistry relates to the fact that keratin interm...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2015.08.003

    authors: Stumptner C,Gogg-Kamerer M,Viertler C,Denk H,Zatloukal K

    更新日期:2016-01-01 00:00:00

  • Chapter 8. Proteomic mapping of the vascular endothelium in vivo for vascular targeting.

    abstract::The mapping and characterization of the vasculature using proteomics offers the opportunity to better understand the steps and molecular mechanisms involved in vascular development, and angiogenesis in particular. Proteomics has many key advantages over genomics, especially in directly determining protein expression. ...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/S0076-6879(08)03008-5

    authors: Griffin NM,Schnitzer JE

    更新日期:2008-01-01 00:00:00

  • Molecular and stable isotope methods to detect and measure anaerobic ammonium oxidation (anammox) in aquatic ecosystems.

    abstract::Numerous microbial processes transform nitrogen (N) but three anaerobic respiratory pathways remove fixed N from the environment: denitrification (nitrate conversion to N(2)), anaerobic ammonium oxidation (anammox; ammonium plus nitrite conversion to N(2)), and nitrite dependent methane oxidation (nitrite conversion t...

    journal_title:Methods in enzymology

    pub_type: 杂志文章,评审

    doi:10.1016/B978-0-12-386489-5.00003-8

    authors: Song B,Tobias CR

    更新日期:2011-01-01 00:00:00

  • Murine lupus.

    abstract::In mice with lupus nephritis qualitative changes in anti-DNA antibodies occur, such as IgG switch and increased cationic charge, to render these antibodies pathogenic. Pathogenic anti-DNA idiotypes can be encoded by genes of a normal mouse strain such as SWR, where they remain dormant. When the normal mice are crossed...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/0076-6879(88)62094-5

    authors: Datta SK

    更新日期:1988-01-01 00:00:00

  • Assessment of IFNγ responsiveness in patient-derived xenografts.

    abstract::Patient-derived xenografts are a useful tool in cancer immunology, as they allow researchers to study human cancers in vivo when starting with a relatively small amount of human tumor tissue. These models make it possible to study tumor cell-intrinsic changes that occur in response to external stimuli including cytoki...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2019.10.027

    authors: Cardenas JJ,Robles-Oteiza C,Politi K

    更新日期:2020-01-01 00:00:00

  • Predicting fluorescence lifetimes and spectra of biopolymers.

    abstract::Use of fluorescence in biology and biochemistry for imaging and characterizing equilibrium and dynamic processes is growing exponentially. Much progress has been made in the last few years on the microscopic understanding of the underlying principles of what controls the wavelength and quenching of fluorescence in bio...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/B978-0-12-381270-4.00001-9

    authors: Callis PR

    更新日期:2011-01-01 00:00:00

  • Isolation and characterization of apolipoproteins A-I, A-II, and A-IV.

    abstract::A number of different analytical techniques are now available for the isolation of apoA-I, apoA-II, and apoA-IV. The choice of a particular technique is dependent on the instrumentation available, and the quantity of isolated apolipoprotein required. The isolation and characterization of the separate isoforms and the ...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/0076-6879(86)28070-2

    authors: Brewer HB Jr,Ronan R,Meng M,Bishop C

    更新日期:1986-01-01 00:00:00

  • Tracking DNA sensor and inflammasome complexes in cells using confocal microscopy.

    abstract::The innate immune system provides host defense against a variety of threats, including microbial infection and cellular damage. Pattern recognition receptors identify both pathogen and damage associated molecular motifs associated with these events. Nucleic acid is one such danger signal that is detected by a set of c...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2019.05.005

    authors: Antiochos B

    更新日期:2019-01-01 00:00:00

  • Methods to study phosphoribosylated ubiquitin ligation and removal.

    abstract::Ubiquitination is a prevalent protein modification catalyzed by E1, E2, and E3 enzymes that activate, conjugate, and ligate, respectively, the ubiquitin protein to substrate protein. In order to establish a mutualistic or parasitic relationship with their eukaryotic hosts, many microorganisms hijack different aspects ...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2019.01.007

    authors: Qiu J,Luo ZQ

    更新日期:2019-01-01 00:00:00

  • LC-MS-MS analysis of neutral eicosanoids.

    abstract::The neutral arachidonic acid derivatives N-arachidonoyl ethanolamine (anandamide or AEA), and 2-arachidonoylglycerol (2-AG) have been identified as endogenous ligands for the cannabinoid receptors. Additionally, these compounds have been identified as substrates of the second isoform of the cyclooxygenase enzyme (COX-...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/S0076-6879(07)33005-X

    authors: Kingsley PJ,Marnett LJ

    更新日期:2007-01-01 00:00:00

  • Dissecting the functional interplay between the TOR pathway and the cilium in zebrafish.

    abstract::The target-of-rapamycin (TOR) pathway is a major regulator of cellular growth, division, and metabolism by coupling growth and nutrient cues to fundamental processes such as translation and transcription. In vertebrate models, disruptions affecting components of the TOR pathway result in cilia size abnormalities and c...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/B978-0-12-397944-5.00009-2

    authors: Yuan S,Zhao L,Sun Z

    更新日期:2013-01-01 00:00:00

  • Purification, analysis, and crystal structure of integrins.

    abstract::Integrins are large modular cell-surface receptors that regulate almost every aspect of cellular function through bidirectional signals transmitted across the lipid bilayer. Regulation of integrin activity is accomplished by complex and still incompletely understood biochemical pathways that modify integrin ligand bin...

    journal_title:Methods in enzymology

    pub_type: 杂志文章,评审

    doi:10.1016/S0076-6879(07)26014-8

    authors: Xiong JP,Goodman SL,Arnaout MA

    更新日期:2007-01-01 00:00:00

  • Highly Modular Bioluminescent Sensors for Small Molecules and Proteins.

    abstract::Obtaining patient-specific information through the quantification of small molecules and proteins in bodily fluids is essential for personalized therapies. Point-of-care (POC) diagnostic devices hold the promise of delivering such benefit to a wide range of patients. However, there is a lack of enabling technology, as...

    journal_title:Methods in enzymology

    pub_type: 杂志文章,评审

    doi:10.1016/bs.mie.2017.01.005

    authors: Yu Q,Griss R,Schena A,Johnsson K

    更新日期:2017-01-01 00:00:00

  • A Multicolor Single-Molecule FRET Approach to Study Protein Dynamics and Interactions Simultaneously.

    abstract::Single-molecule Förster resonance energy transfer (smFRET) is a versatile tool for studying biomolecules in a quantitative manner. Multiple conformations within and interactions between biomolecules can be detected and their kinetics can be determined. Thus, smFRET has become an essential tool in enzymology. Ordinary ...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/bs.mie.2016.08.024

    authors: Götz M,Wortmann P,Schmid S,Hugel T

    更新日期:2016-01-01 00:00:00

  • Use of mouse models to study plasminogen activator inhibitor-1.

    abstract::Plasminogen activator inhibitor-1 (PAI-1) is the main inhibitor of tissue-type plasminogen activator (t-PA) and urokinase-type plasminogen activator (u-PA) and therefore plays an important role in the plasminogen/plasmin system. PAI-1 is involved in a variety of cardiovascular diseases (mainly through inhibition of t-...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/B978-0-12-386471-0.00005-5

    authors: Declerck PJ,Gils A,De Taeye B

    更新日期:2011-01-01 00:00:00

  • Chapter 1 Visualizing functional flexibility by three-dimensional electron microscopy reconstructing complex I of the mitochondrial respiratory chain.

    abstract::Complex I is the major entry point in the bacterial and mitochondrial respiratory chain. Structural knowledge of the enzyme is still limited because of its large size and complicated architecture. Only the structure of the hydrophilic domain of a bacterial Complex I has been solved to high resolution by X-ray crystall...

    journal_title:Methods in enzymology

    pub_type: 杂志文章

    doi:10.1016/S0076-6879(08)04401-7

    authors: Radermacher M

    更新日期:2009-01-01 00:00:00

  • Use of the conjugate peak refinement algorithm for identification of ligand-binding pathways in globins.

    abstract::Determination of the three-dimensional structures of the globins led to the problem of determining how the ligands bound to the heme. In many of these structures there was no clear path from the solvent to the ligand-binding site. Even in those structures that appeared to have one or more tunnels from the exterior to ...

    journal_title:Methods in enzymology

    pub_type: 杂志文章,评审

    doi:10.1016/S0076-6879(07)37021-3

    authors: Golden SD,Olsen KW

    更新日期:2008-01-01 00:00:00