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Lsm 510 confocal laser scanning microscope

Manufactured by Zeiss
Sourced in Germany, United States, Japan

The LSM 510 is a confocal laser scanning microscope manufactured by Zeiss. It is designed to capture high-resolution images of samples by scanning them with a focused laser beam and detecting the emitted fluorescence or reflected light. The system utilizes a set of optical components, including lenses, mirrors, and detectors, to create a detailed, three-dimensional representation of the sample.

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302 protocols using lsm 510 confocal laser scanning microscope

1

Immunofluorescence Analysis of Cytoskeleton and AR

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Cytoskeleton changes and BrdU incorporation were analyzed by IF as reported20 (link),28 (link). Endogenous AR was visualized using diluted (1:100) rabbit polyclonal antibody against the N-terminal domain of AR (Ab-2; Neomarkers; Portsmouth, New Hampshire, USA). Diluted (1:200 in PBS containing 0.2% bovine serum albumin) anti-rabbit fluorescein isothiocyanate-conjugated antibody (Jackson Laboratories, Bar Harbor, Maine, USA) was used as a secondary reagent. Nuclei were stained with Hoechst 33258 (Sigma-Aldrich) and coverslips were inverted and mounted in Mowiol (Sigma-Aldrich). In AR/FlnA co-localization and AR nuclear translocation analysis, the receptor was revealed using the rabbit Alexa Fluor 488-conjugate anti AR antibody (clone D6F11 from Cell Signaling; Danver, MA, USA). FlnA was stained using diluted (1:50 in PBS) goat polyclonal anti-FlnA antibody (Ab11074; Abcam; Cambridge, UK). Goat antibody was detected using diluted (1:300 in PBS) rabbit anti-goat Texas red-conjugated antibody (Abcam). Cells on coverslips were analyzed using a DMLB (Leica; Wetzlar, Germany) fluorescent microscope, equipped with HCX PL Apo ×63 oil and HCX PL Fluotar ×100 oil objectives. Images were captured using DC480 camera (Leica) and acquired using Leica Suite software. AR/FlnA co-localization was analyzed29 (link), using a Zeiss (Oberkochen, Germany) LSM 510 laser scanning confocal microscope.
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2

Visualizing Actin Cytoskeleton Reorganization

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Actin cytoskeleton reorganization was assessed via filamentous actin (F-actin) staining, as reported previously [19 (link)]. Briefly, after each treatment, the cells were fixed with 4% paraformaldehyde for 24 hours and permeabilized with 0.2% Triton X-100. Following blocking of nonspecific binding using 0.5% foetal bovine serum, the cells were stained with rhodamine-conjugated phalloidin (100 ng/ml, Biotium, USA) and 4′,6-diamidino-2-phenylindole dihydrochloride (DAPI; 5 μg/mL, Sigma) for 20 minutes. Images of the fluorescently labelled specimens were captured using an LSM 510 laser scanning confocal microscope equipped with immersion lenses (Carl Zeiss Meditec, Jena, Germany). The stress fibres in 100 cells on each slide were randomly analysed under a Zeiss fluorescence microscope. Cells exhibiting stress fibres were analysed with an Olympus fluorescence microscope. LSM 510 software was employed to determine the numbers of cells exhibiting stress fibres according to previous studies [20 (link),21 (link)]. The data were expressed as the percentages (mean ± SD) of 100 cells counted on each slide.
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3

Evaluating Phagocytosis and Trafficking of Bacteria

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GFP-expressing S. aureus (Newman strain) were harvested during their logarithmic-growth phase and incubated with BMDMs at an MOI of 10 for 60 and 120 min. LysoTracker-Red (Invitrogen) was added to BMDMs 30 min before the end of the incubation period and extracellular S. aureus were lysed with Lysostaphin (Sigma). Cells were fixed with 4% PFA in PBS and confocal images were acquired with an inverted Zeiss LSM510 laser scanning confocal microscope and a 60x NA 1.45 oil-immersion objective (Zeiss). Image analysis was done using ImageJ software (NIH). The percentage of phagocytosed S. aureus colocalizing with LysoTracker-Red was determined by blinded counting. To study trafficking of phagocytosed mycobacteria to lysosomes, BMDMs were infected with 10 MOI of GFP-expressing Bacille Calmette-Guerin (BCG, an attenuated strain of M. bovis) (45 (link)) for 3 h, then washed 3 times with media and incubated another 24 h in RPMI medium at 37°C. Cells were washed once and fixed with 4% PFA in PBS for 30 min, permeabilized with 0.1% saponin in PBS for 5 min and incubated with polyclonal rabbit anti-LAMP1 antibody (Abcam). Images were captured using a Nikon Eclipse TiE/B automated fluorescent microscope with Photometrics HQ@ Monochrome digital camera. 60x z-stack images were acquired and analyzed using NIS-Elements DUO software as previously described (45 (link)).
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4

Live-cell Imaging of Focal Adhesions

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GFP-paxillin-expressing cells were plated on glass-bottom dishes (MatTek) coated with 1 μg ml−1 fibronectin and allowed to adhere for 1 h. Images were acquired with an LSM 510 laser scanning confocal microscope (CarlZeiss) equipped with a 63x/1.40 NA Plan Apo oil objective lens at 37 °C with 5% CO2. Images were taken every 30 sec for 45 min. The rate constants for assembly and disassembly of adhesions were measured through the Focal Adhesion Analysis Server 49 (link).
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5

Live Imaging of Focal Adhesion Dynamics

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GFP-paxillin-expressing cells were plated on glass-bottom dishes (MatTek) coated with 1 μg ml−1 FN and allowed to adhere for 1 h. Images were acquired with an LSM 510 laser scanning confocal microscope (CarlZeiss) equipped with a × 63/1.40 NA Plan Apo oil objective lens at 37 °C with 5% CO2. Images were taken every 30 s for 45 min. The rate constants for assembly and disassembly of adhesions were measured through the Focal Adhesion Analysis Server49 (link).
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6

Immunofluorescence Analysis of Mitotic Spindle

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A549 cells and H460 cells were transfected with PIG3 or NC siRNAs. Cells were plated and cultured on poly-d-lysine-coated cover slides 48 h after transfection. Cells were washed twice in PBS and fixed in 4% paraformaldehyde/PBS at room temperature for 30 min. Next, the cells were permeabilized with 0.5% Triton X-100/PBS at room temperature for 15 min. After permeabilization, cells were blocked with 1% bovine serum albumin/PBS at room temperature for 30 min. Immunostaining was performed by incubating with anti-α-tubulin antibody, γ-tubulin (Sigma, St Louis, MO, USA) and phosphorylated H3 (pSer10) (Cell Signaling Technology, Beverly, MA, USA) antibodies (1:1000) for 4 h at room temperature. After incubating with the primary antibodies, cells were washed three times with PBS. Cells were then incubated with Alexa-488 conjugated anti-rabbit and Alexa-568 conjugated anti-mouse secondary antibodies (Invitrogen, Carlsbad, CA, USA) for 1 h at 37 °C. For visualization of DNA, 4, 6-diamidino-2-phenylindole (DAPI, Vector Laboratories, Burlingame, CA, USA) was added to the mounting medium. Images were obtained using a LSM 510 laser-scanning confocal microscope (Zeiss, Germany).
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7

Visualizing Burkholderia pseudomallei Infection

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J774A.1 or HeLa cells were infected with B. pseudomallei wild-type or its derivatives at a multiplicity of infection (MOI) of 0.5 or 50, respectively. At the experimental end-point, the infected cells were fixed with 4% (w/v) paraformaldehyde in phosphate-buffered saline (PBS) overnight. Cells were permeabilized with PBS containing 0.1% (v/v) Triton X-100 for 30 min and incubated with PBS containing 1% (w/v) bovine serum albumin (BSA) for 30 min at room temperature. Bacteria were stained with rabbit polyclonal anti-B. pseudomallei lipopolysaccharide antibody (kindly provided by Prof. R.W. Titball, Exeter University, UK) at 37°C for 1 h, washed with PBS and then incubated with goat anti-rabbit antibody-Alexa Fluor488 (Molecular Probes). Nuclei were stained with DAPI (4', 6-Diamidino-2-Phenylindole, Dihydrochloride; Molecular Probes). F-actin was directly stained using phalloidin568 (Molecular Probes). BimA protein was detected with a panel of three previously described monoclonal antibodies (Stevens et al., 2005b (link)). Bound anti-BimA was detected with goat anti-mouse antibody-AlexaFluor568 (Molecular Probes). Images were captured using an LSM 510 laser scanning confocal microscope (Carl Zeiss).
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8

Subcellular Localization of GmPGL2 Protein

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The full-length CDS and the 594-bp region (GmPGL21-198) of the GmPGL2 gene were fused to green fluorescent protein (GFP) at the C terminal, and then amplified and cloned into the modified 3301H vector at the XmaI and HindIII sites. We prepared two constructs, namely, 35:GmPGL2-GFP and 35S:GmPGL21-198-GFP, which were introduced into A. tumefaciens (strain EHA105) and subsequently used to infiltrate Nicotiana benthamiana leaves as described previously (Waadt and Kudla, 2008 (link)). The GFP fluorescence signals were detected using a LSM510 laser scanning confocal microscope (Carl Zeiss, Germany). Transmission electron microscopy was performed according to a previously described method (Kwon and Cho, 2008 (link)).
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9

Multimodal Imaging for 3D Modeling

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Any microscopy imaging modality that creates 3D datasets can be used for the creation of physical models. This includes microscopy techniques like confocal microscopy [11 (link)] and multiphoton microscopy [12 (link)] that section tissue by taking 2D images at different depths through the sample, as well as optical techniques that are tomographic, like optical projection tomography (OPT) [13 (link)] and electron tomography [14 (link)] that use 2D projections at many different angles to create a 3D dataset. The imaging modalities used to collect the three independent datasets for the models described here are confocal microscopy [11 (link)], electron tomography [14 (link)] and multiphoton microscopy [15 (link)].
Specifically, a Caenorhabditis elegans embryo expressing a membrane-localized green fluorescent protein (GFP) marker was imaged using multiphoton laser scanning microscopy [16 (link)]. A C. elegans distal tip cell expressing a GFP marker was imaged with 63X 1.4NA objective and 488 nm excitation on a Zeiss LSM510 laser scanning confocal microscope. And a prevacuolar compartment of a high-pressure frozen/freeze substituted maize aleurone cell was imaged by dual electron tomography in a Tecnai F30 transmission electron microscope [17 (link)].
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10

Immunocytochemistry Analysis of Cellular Proteins

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Immunocytochemistry analysis was performed as described previously [22 (link)]. Briefly, cells were fixed on coverslips for 30 min at room temperature in 4% paraformaldehyde in PBS and then permeabilized and blocked in 5% FBS with 0.1% Triton X-100 in 1X PBS for 1 h. The cover slips were incubated overnight at 4°C with primary antibodies diluted in blocking buffer. After a wash in PBS (three times, 15 min each), the cover slips were incubated with Texas Red goat anti-rabbit IgG secondary antibody for 1 h at room temperature. This was followed by washing three times with PBS and mounting in an aqueous medium. Fluorescent images were obtained with a Zeiss LSM-510 laser scanning confocal microscope. Images were processed and merged by Adobe Photoshop software.
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