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Lysosomes

Lysosomes are specialized organelles found in eukaryotic cells that function as the cell's digestive system.
These membrane-bound vesicles contain a variety of hydrolytic enzymes capable of breaking down a wide range of biological molecules, including proteins, nucleic acids, carbohydrates, and lipids.
Lysosomes play a crucial role in cellular homeostasis, recycling, and the degradation of damaged or unwanted cellular components.
Dysfunctions in lysosomal structure or activity have been implicated in a number of inherited metabolic disorders, known as lysosomal storage diseases, as well as in more common age-related diseases like Alzheimer's and Parkinson's.
Understanding the mechanisms governing lysosome function is an active area of research with important implications for human health and disease.
A typo: Lysosomes are specialzied organelles found in eukaryotic cells that function as the cell's digestive system.

Most cited protocols related to «Lysosomes»

The hepatocyte cell line RALA255-10G was cultured under nontransformed conditions, as described previously20 (link). Wild-type and Atg5−/− mouse embryonic fibroblasts provided by N. Mizushima21 (link) were cultured as described previously22 (link). TG content was determined by the Trig/GB Kit (Roche Diagnostics), cholesterol content by the Amplex Red Cholesterol Assay (Invitrogen), fatty acid β-oxidation by a modification of a previously used method23 (link), and TG decay in cells radiolabelled with [14C]oleate and TG synthesis by standard methods12 (link). shRNAs were cloned into pSUPER (Ambion) and then pCCL.sin.PPT.hPGK.GFPWpre24 (link). Protein isolation and western blotting were performed as described previously25 (link). Fluorescence microscopy for BODIPY 493/503 (Invitrogen) and immunofluorescence were performed as described previously26 (link). Atg7F/F mice4 (link) were crossed with Alb-Cre mice27 (link) to generate Atg7F/F-Alb-Cre mice. Some animals were fed a high-fat diet (60% kcal in fat; Research Diets, D12492). Electron microscopy and immunogold labelling were performed as described previously26 (link). LDs from mouse livers were isolated by sucrose density gradient centrifugation28 and autophagic vacuoles and lysosomes by centrifugation in metrizamide discontinuous density gradients29 (link).
Publication 2009
4,4-difluoro-1,3,5,7,8-pentamethyl-4-bora-3a,4a-diaza-s-indacene Anabolism Animals Autophagosome Biological Assay Cell Lines Cells Centrifugation Cholesterol Diagnosis Diet Diet, High-Fat Electron Microscopy Embryo Fatty Acids Fibroblasts formaldehyde-serum albumin Hepatocyte Immunofluorescence isolation Liver Lysosomes Metrizamide Mice, Laboratory Microscopy, Fluorescence Oleate Proteins Short Hairpin RNA Sucrose

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Publication 2009
Animals Biological Assay Cell Culture Techniques Cells Cultured Cells Hepatocyte Homozygote isolation Liver Lysosomes Proteolysis Tissues
To complement incomplete annotations in the background database, a homology-ontology annotation retrieved by BLAST should be accompanied by an accurate subcellular localization prediction for each homologous sequence. CELLO has been shown to be helpful for the prediction of subcellular localizations of the proteins found in a proteomic data. [28] (link) Using multiple, integrated machine-learned classifiers, CELLO predicts which of four subcellular localizations in archaea and in Gram-positive bacteria, five subcellular localizations in Gram-negative bacteria, and twelve subcellular localizations in eukaryotes that the targeted protein might be found in, with the four archaeal and Gram-positive bacterial localizations being the extracellular space, the cell wall, the cytoplasmic membrane, and the cytoplasm; the five Gram-positive bacterial localizations being the extracellular space, the outer membrane, the periplasmic and cytoplasmic (inner) membranes, and the cytoplasm; and the 12 eukaryotic localizations being chloroplasts, the cytoplasm, the cytoskeleton, the endoplasmic reticulum, the extracellular/secretory space, the Golgi, lysosomes, mitochondria, the nucleus, peroxisomes, the plasma membrane, and vacuoles. Due to subcellular data increased exponentially over the years, CELLO has been trained on latest models and denoted as update version wrapping in CELLO2GO. And the resultant datasets used for prediction and evaluation is from PSORTb3.0 [23] (link).
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Publication 2014
Archaea Cell Nucleus Cell Wall Chloroplasts Cytoplasm Cytoskeleton Endoplasmic Reticulum Eukaryota Eukaryotic Cells Extracellular Space Golgi Apparatus Gram-Positive Bacteria Gram Negative Bacteria Homologous Sequences Lysosomes Mitochondria Periplasm Peroxisome Plasma Membrane Proteins secretion Tissue, Membrane Vacuole
Caspase-1 activation of human and mouse brain tissue were analyzed by Western blot of cleaved caspase-1. IL-1β was quantified by ELISA. Microglial ASC speck formation was detected by immunohistochemistry. All mice were on C57/Bl6 background, including WT, NLRP3−/−,27 (link), APP/PS15 (link), APP/PS1/NLRP3−/−, Caspase-1−/−,28 (link), APP/PS1/Caspase-1−/− and were analyzed for cognitive function using the Morris Water Maze, the object recognition test and open field behavioural testing. Synaptic plasticity was determined by measuring long term potentiation (LTP) in acutely isolated hippocampal slices. Spine density was assessed by analyzing mid apical dendritic sections of pyramidal CA1 neurons. Cerebral Aβ load was determined by thioflavin-S-histochemistry of serial sections. Sequential extraction of homogenized brains by radio-immunoprecipitation assay, sodium dodecyl sulfate buffer and formic acid was employed to determine Aβ levels. Aβ nitration was determined by ELISA and immunohistochemistry using a specific antibodies against 3NTyr10 (link)-Aβ25 (link). Western blot detection was used to analyze the protein levels of APP, CTFs, Aβ, BACE1, IDE and NOS2. Inflammasome activation was confirmed by detection of ASC speck formation in microglia isolated from adult mouse. Microglial Aβ phagocytosis was determined after peripheral injection of methoxy-XO4, isolation of microglia and subsequent FACS analysis. Confirmatory immunocytochemistry was performed using antibody IC16 and the lysosomal marker LAMP2. Plaque morphology and microglial Aβ uptake was analyzed by coimmunostaining with Iba-1, methoxy-XO4 and IC16. mRNA levels of IDE, NEP, M1 and M2 markers were determined either from sorted microglia or from brain tissue by qPCR.
Publication 2012
Adult Antibodies BACE1 protein, human Biological Assay Brain Buffers Caspase 1 Cognition Dendrites Enzyme-Linked Immunosorbent Assay formic acid Histocytochemistry Homo sapiens Immunocytochemistry Immunoglobulins Immunohistochemistry Immunoprecipitation Inflammasomes Interleukin-1 beta isolation LAMP2 protein, human Long-Term Potentiation Lysosomes Mice, Laboratory Microglia Morris Water Maze Test Neuronal Plasticity Nitrates Nitric Oxide Synthase Type II Phagocytosis Proteins Pyramidal Cells RNA, Messenger Senile Plaques Sulfate, Sodium Dodecyl thioflavine Tissues Vertebral Column Western Blotting
Upon stimulation by sensitive target cells, NK cells rapidly release cytotoxic proteins by polarized fusion of secretory lysosomes with the plasma membrane. Secretion of chemokines and cytokines is a slower process, requires transcription and de novo protein synthesis, and follows different vesicular pathways. Thus, the temporal kinetics of responses must be taken into consideration when designing experiments that assess distinct NK cell functional parameters.
As a note of caution, although NK cell degranulation is a prerequisite for NK cell cytotoxicity, assessment of degranulation does not necessarily correlate with target cell lysis. Target cell lysis depends not only on the extent of effector cell degranulation, but also on the content of secretory lysosomes, target cell structures that facilitate adhesion, and polarized secretion of secretory granules, in addition to the target cell’s intrinsic sensitivity to NK cell-mediated death pathways (8 (link)).
Here we provide detailed instructions for a 2-hour assay that quantifies human NK cell degranulation by assessing CD107a surface expression, which is based on the use of peripheral blood mononuclear cells (PBMC) and standard target cell lines. This assay has been used for the differential diagnosis of defects in cellular cytotoxicity (10 (link), 12 (link)). Furthermore, instructions are presented for a comprehensive 6-hour assay in which human NK cell degranulation, as evaluated by CD107a surface expression, is assessed simultaneously with chemokine and cytokine production, detected by intracellular staining of MIP-1β, TNF-α, and IFN-γ. Induction of MIP-1β production is generally robust in NK cells and can be measured as early as 30 min after target cell mixing, whereas TNF-α and IFN-γ are delayed. Depending on the available flow cytometer, additional antibodies can successfully be combined, facilitating increasingly detailed analysis of other functional parameters or responses in specific NK cell subsets. Although PBMCs are used as effector cells in the assays described here, the assays are also applicable to purified NK cells.
Publication 2010
Antibodies Biological Assay Cell Death Cell Degranulation Cell Lines Cells Chemokine Cytokine Cytotoxin Differential Diagnosis Homo sapiens Hypersensitivity Interferon Type II Kinetics lysosomal proteins Lysosomes Natural Killer Cells PBMC Peripheral Blood Mononuclear Cells Plasma Membrane Protein Biosynthesis Protoplasm secretion Secretions, Bodily Secretory Granule Transcription, Genetic Tumor Necrosis Factor-alpha

Most recents protocols related to «Lysosomes»

Not available on PMC !

Example 4

To determine where 2F2-grafted “humanized” antibodies and antibody variants are delivered upon internalization into the cell, colocalization studies of the anti-CD79b antibodies internalized into B-cell lines may be assessed in Ramos cell lines. LAMP-1 is a marker for late endosomes and lysosomes (Kleijmeer et al., Journal of Cell Biology, 139(3): 639-649 (1997); Hunziker et al., Bioessays, 18:379-389 (1996); Mellman et al., Annu. Rev. Dev. Biology, 12:575-625 (1996)), including MHC class II compartments (MIICs), which is a late endosome/lysosome-like compartment. HLA-DM is a marker for MIICs.

Ramos cells are incubated for 3 hours at 37° C. with 1 μg/ml 2F2-grafted “humanized” antibodies and antibody variants, FcR block (Miltenyi) and 25 μg/ml Alexa647-Transferrin (Molecular Probes) in complete carbonate-free medium (Gibco) with the presence of 10 μg/ml leupeptin (Roche) and 5 μM pepstatin (Roche) to inhibit lysosomal degradation. Cells are then washed twice, fixed with 3% paraformaldehyde (Electron Microscopy Sciences) for 20 minutes at room temperature, quenched with 50 mM NH4Cl (Sigma), permeabilized with 0.4% Saponin/2% FBS/1% BSA for 20 minutes and then incubated with 1 μg/ml Cy3 anti-mouse (Jackson Immunoresearch) for 20 minutes. The reaction is then blocked for 20 minutes with mouse IgG (Molecular Probes), followed by a 30 minute incubation with Image-iT FX Signal Enhancer (Molecular Probes). Cells are finally incubated with Zenon Alexa488-labeled mouse anti-LAMP1 (BD Pharmingen), a marker for both lysosomes and MIIC (a lysosome-like compartment that is part of the MHC class II pathway), for 20 minutes, and post-fixed with 3% PFA. Cells are resuspended in 20 μl saponin buffer and allowed to adhere to poly-lysine (Sigma) coated slides prior to mounting a coverglass with DAPI-containing VectaShield (Vector Laboratories). For immunofluorescence of the MIIC or lysosomes, cells are fixed, permeabilized and enhanced as above, then co-stained with Zenon labeled Alexa555-HLA-DM (BD Pharmingen) and Alexa488-Lamp1 in the presence of excess mouse IgG as per the manufacturer's instructions (Molecular Probes).

Accordingly, colocalization of 2F2-grafted “humanized” antibodies or antibody variants with MIIC or lysosomes of B-cell lines as assessed by immunofluorescence may indicate the molecules as excellent agents for therapy of tumors in mammals, including B-cell associated cancers, such as lymphomas (i.e. Non-Hodgkin's Lymphoma), leukemias (i.e. chronic lymphocytic leukemia), and other cancers of hematopoietic cells.

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Patent 2024
Alexa Fluor 647 Anti-Antibodies Antibodies, Monoclonal, Humanized B-Lymphocytes Buffers Carbonates CD79B protein, human Cell Lines Cells Chronic Lymphocytic Leukemia Cloning Vectors DAPI Electron Microscopy Endosomes Genes, MHC Class II Hematopoietic Neoplasms Immunofluorescence Immunoglobulins Leukemia leupeptin Lymphoma Lymphoma, Non-Hodgkin Lysine lysosomal-associated membrane protein 1, human Lysosomes Malignant Neoplasms Mammals Molecular Probes Mus Neoplasms paraform pepstatin Poly A Saponin Therapeutics Transferrin
Not available on PMC !

Example 10

The ETSD design successfully translocated N to the endosomal subcellular compartment. After infection of HeLa cells with N-ETSD, N co-localized with the endosomal marker 45 transferrin receptor (CD71), as shown in FIG. 12c, and also co-localized with the lysosomal marker Lamp1 (FIG. 12d), demonstrating that N-ETSD is translocated throughout the endosomal pathway to lysosomes, enabling processing for MHC II presentation. N-wild type (N-WT), compared to N-ETSD, shows diffuse cytoplasmic distribution and does not co-localize with the lysosomal marker (FIG. 12e). These findings confirm the role of the ETSD in directing N to an endosomal/lysosomal compartment that will result in increased MHC II presentation and CD4+activation by N.

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Patent 2024
Cytoplasm Endosomes HeLa Cells Infection lysosomal-associated membrane protein 1, human Lysosomes TFRC protein, human
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Example 6

FIG. 13 shows the in vitro degradation of the acetyl-chitosan, butyryl-chitosan and Na2CO3 treated chitosan film when exposed to 100 μg/ml of lysosome in phosphate buffered saline (PBS). Both acetyl-chitosan and butyryl-chitosan resisted degradation and maintained mass longer than Na2CO3 treated chitosan film.

FIG. 14 shows the ultimate suture pullout load for acetyl-chitosan, butyryl-chitosan and regenerated (deacylated) chitosan when wet or dry.

FIG. 15 shows the weight gain or swelling after exposure to a hydrophilic solvent of Na2CO3 treated chitosan film, acetyl-chitosan, butyryl-chitosan and regenerated (deacylated) chitosan. The stabilized electrospun chitosan fiber membranes show good cytocompatibility, structural stability, suggesting future exploration in tissue engineering applications.

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Patent 2024
Chitosan Fibrosis Lysosomes Phosphates Saline Solution Solvents Sutures Tissue, Membrane

Example 11

Based on the evidence that S-Fusion+N-ETSD resulted in enhanced expression of physiologically-relevant RBD and that N-ETSD successfully translocated to the endosomal/lysosomal compartment, the bivalent hAd5 S-Fusion+N-ETSD vaccine was chosen for inoculation of 7-week old female CD-1 mice. The unique properties of this construct would result in the generation of both CD8+ and CD4+ T-cell responses and neutralizing antibodies. As described in Methods, mice received an initial injection on Day 0 and a second injection on Day 21. Sera were collected on Day 0 and at the end of the study on Day 28 for antibody and neutralization analyses. Splenocytes were also collected on Day 28 for intracellular cytokine staining (ICS) and ELISpot analyses. All age- and gender-matched animals assigned to the study appeared normal with no site reactions and no loss of body weight throughout the dosing were seen, consistent with previous observations with the hAd5 [E1-, E2b-, E3-] platform

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Patent 2024
Animals Antibodies, Neutralizing Binding Sites CD4 Positive T Lymphocytes Cytokine Endosomes Enzyme-Linked Immunospot Assay Females Human Body Immunogenicity, Vaccine Immunoglobulins Lysosomes Mus Protoplasm Serum Vaccination Vaccines Vision
Knockout (KO) of GlcNAc-1-phosphate transferase subunits alpha and beta (Gnptab) gene was carried out in selected CHO clones that stably express the lysosomal enzymes of interest. Cells were seeded at a density of 0.5 × 106 cells/mL in T25 flasks 24 h prior to transfection, and ∼2 × 106 cells and 1 μg each of plasmid DNA of Cas9-GFP and gRNA were used for electroporation. 48 h after electroporation, cells with GFP expression were enriched by FACS. After culturing for 1 week, cells were single cell sorted by FACS into 96-wells. KO clones with desired mutations were identified using a rapid and efficient screening method, Indel Detection by Amplicon Analysis (IDAA), as previously described (Yang et al., 2015a (link)). Final clones were verified by Sanger sequencing. On average 2–5 clones with frameshift mutations were selected from each targeting event. The full list of CRISPR gRNA design and PCR primers used is listed elsewhere (Tian et al., 2019 (link)).
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Publication 2023
Cells Clone Cells Clustered Regularly Interspaced Short Palindromic Repeats Electroporation Enzymes Frameshift Mutation Gene Knockout Techniques Glycoprotein Hormones, alpha Subunit INDEL Mutation Lysosomes Mutation N-acetylglucosamine-1-phosphate Oligonucleotide Primers Plasmids Transfection Transferase

Top products related to «Lysosomes»

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LysoTracker Red DND-99 is a fluorescent dye that selectively stains acidic organelles, such as lysosomes, in live cells. It can be used to visualize and monitor the distribution and activity of lysosomes within the cellular environment.
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LysoTracker Red is a fluorescent dye that selectively stains acidic organelles, such as lysosomes, in live cells. It is a useful tool for visualizing and tracking the dynamics of these organelles within the cellular environment.
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LysoTracker is a fluorescent dye that selectively labels acidic organelles, such as lysosomes, in live cells. It is a useful tool for the visualization and analysis of lysosomal function in various cell types and biological applications.
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LysoTracker Green DND-26 is a fluorescent probe that selectively stains acidic organelles, such as lysosomes, in live cells. It is a membrane-permeant dye that accumulates in acidic compartments due to protonation. The dye exhibits green fluorescence upon uptake, allowing visualization and tracking of lysosomal dynamics.
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Hoechst 33342 is a fluorescent dye that binds to DNA. It is commonly used in various applications, such as cell staining and flow cytometry, to identify and analyze cell populations.
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Bafilomycin A1 is a macrolide compound that acts as a potent and specific inhibitor of vacuolar-type H+-ATPases (V-ATPases). V-ATPases are involved in the acidification of various intracellular compartments, making Bafilomycin A1 a useful tool for studying cellular processes that rely on pH regulation.
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LysoTracker Deep Red is a fluorescent dye that selectively accumulates in the acidic compartments of live cells, such as lysosomes. It is useful for labeling and tracking the dynamics of these organelles in various cellular processes.
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MG132 is a proteasome inhibitor, a type of laboratory reagent used in research applications. It functions by blocking the activity of the proteasome, a complex of enzymes responsible for the degradation of proteins within cells. MG132 is commonly used in cell biology and biochemistry studies to investigate the role of the proteasome in various cellular processes.
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Chloroquine is a laboratory chemical primarily used as a research tool in biochemical and cell biology applications. It is a white, crystalline solid that is soluble in water. Chloroquine is commonly used in experiments to study cellular processes, such as autophagy and endocytosis, by inhibiting the function of lysosomes. Its core function is to serve as a research reagent for scientific investigations, without making any claims about its intended use.
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LysoTracker Green is a fluorescent probe that selectively labels acidic organelles, such as lysosomes, in live cells. It is a useful tool for monitoring lysosomal function and dynamics.

More about "Lysosomes"

Lysosomes are specialized, membrane-bound organelles found in eukaryotic cells that function as the cell's digestive system.
These organelles contain a variety of hydrolytic enzymes capable of breaking down a wide range of biological molecules, including proteins, nucleic acids, carbohydrates, and lipids.
Lysosomes play a crucial role in cellular homeostasis, recycling, and the degradation of damaged or unwanted cellular components.
Dysfunctions in lysosomal structure or activity have been implicated in a number of inherited metabolic disorders, known as lysosomal storage diseases, as well as in more common age-related diseases like Alzheimer's and Parkinson's.
Understanding the mechanisms governing lysosome function is an active area of research with important implications for human health and disease.
Lysosome research often utilizes fluorescent dyes like LysoTracker Red DND-99, LysoTracker Red, LysoTracker, LysoTracker Green DND-26, and LysoTracker Deep Red to visualize and study these organelles.
Other compounds like Hoechst 33342, Bafilomycin A1, and Chloroquine are also used to investigate lysosomal structure and function.
The proteasome inhibitor MG132 can also provide insights into the role of lysosomes in protein degradation.
Optimizing research protocols and accurately locating the best published methods is crucial for advancing our understanding of these important cellular structures.
PubCompare.ai's AI-powered tools can help researchers unlock reproducibility and accuracy in lysosome studies by effortlessly comparing published protocols and identifying the most suitable approaches.