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19 protocols using iplab software

1

Mitotic FRET Biosensor Imaging

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For imaging of the FRET biosensors, cells were plated on 22 × 22 mm no. 1.5 glass coverslips (Fisher Scientific) coated with Poly-D-lysine (Sigma). 24 hrs post-transfection of DNA constructs, cells were subjected to a double thymidine block and then released in the presence of nocodazole ± ZM447439 (Sigma) to enrich for mitotic cells. Images were acquired on a Leica DM4000 microscope with a 100 × 1.4 NA objective, an XY-piezo Z stage (Applied Scientific Instrumentation), a spinning disk confocal (Yokogawa), an electron multiplier CCD camera (Hamamatsu ImageEM), and an LMM5 laser merge module (Spectral Applied Research), controlled by IP Lab software (BD Biosciences). CFP was excited at 440 nm. CFP and YFP emissions were acquired simultaneously with a beamsplitter (Dual-View, Optical Insights). Custom software written in Matlab (Mathworks) was used for image analysis [23]. The program identified individual kinetochores from the confocal image stacks, and the YFP/TFP emission ratio was calculated at each centromere/kinetochore as previously described [23].
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2

Quantification of Norepinephrine Transporter Levels

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Total protein from ventral hippocampus, medial prefrontal cortex and locus coeruleus was isolated by homogenization in RIPA buffer. Protein concentration was determined by DC Protein Assay (Bio-Rad, Hercules, CA) with Bio-Tek plate reader. Briefly, 10 μg of total protein were separated on 4%–15% Tris-HCl gradient precast gels (Bio-Rad) and transferred to nitrocellulose membranes (Bio-Rad). After blocking in Tris-buffered saline (TBS) containing 5% dry milk and 0.1% Tween 20 [TBS with Tween 20 (TBST)], membranes were incubated with primary anti-NET (Abcam 41559) overnight at 4°C. After incubation with secondary anti-Rabbit (IRDye 800CW) signal was visualized using the Odyssey Infrared Imaging System (Li-Cor Biosciences, Lincoln, NB) and analyzed using IPLab software (BD Biosciences, San Jose, CA). NET protein levels were normalized to GAPDH with anti-GAPDH (14C10) from Cell Signaling (Danvers, MA).
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3

Immunofluorescence Staining of PC12 and Spinal Neurons

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PC12 cells and dissociated spinal cord cultures were fixed with 4% paraformaldehyde for 20 min, washed in PBS, permeabilized with 0.3% Triton X-100 for 15 min, blocked in 2% goat serum (Jackson ImmunoResearch, West Grove, PA, USA) for 20 min and incubated with primary antibody diluted in 1.5% goat serum for 1 h. Cells were washed in PBS and incubated with secondary antibody (FITC- or Texas Red-conjugated; Jackson ImmunoResearch, West Grove, PA, USA) for 30 min, washed with PBS, incubated in Hoechst (2 μg/ml), washed in PBS and mounted in Vectashield (Vector Laboratories, Burlingame, CA, USA). Fluorescence was visualized with a Leica (Leica Microsystems GmbH, Wetzlar, Germany) microscope and pictures were taken with a Leica camera and compiled with IP Lab software (BD Biosciences, Rockville, MD, USA). Antibodies utilized included the following: [AR(N20), AR(H280)] (1:100), p16(M-156) (1:50) (Santa Cruz Biotechnology); PSME3 (1:100) (BD Transduction Laboratories); FLAG (1:100) (Affinity BioReagents); SMI32 (1:1000) (Sternberger Monoclonal, Baltimore, MD, USA).
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4

Quantification of IL-6 and TNF-α in Pancreatic Acinar Cells

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IF was conducted using thin sections of human pancreatic fragments and acinar cell-blocks. Briefly, the sections were deparaffinised with xylene following which they were washed and fixed in 100% methanol and incubated with primary antibody (1:1000) at 4 °C overnight, followed by fluoroscent tagged secondary antibody (1:2000) in dark at room temperature. After several steps of washing, final incubation with DAPI for 15 min was performed. At least 5 randomly selected images per histology sections from each experiment (n = 3) were viewed in the Olympus IX71 fluorescence microscope, and fluorescent images captured using the CARVII bioimager (BD Biosciences) mounted with the IPLAB software (BD Biosciences). We quantified IL-6 or TNF-α positive cells per 100 amylase positive cells and expressed as mean (SEM).
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5

DNA Replication Analysis by DNA Combing

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Cells were incubated with or without 5 μM camptothecin (CPT) for 4 hours before they were pulse-labeled sequentially with 50 μM iododeoxyuridine (IdU) and 100 μM chlorodeoxyuridine (CldU) (Sigma) for 20 min each. Cells were then harvested for the DNA combing assay as described previously 31 . Images were scanned with an inverted fluorescence microscope using a 40X objective, and recorded using IPLab software (BD Biosciences, Rockville, MD). Fluorescent signals were measured using the ImageJ program (National Cancer Institute) and converted to base-pair values according to the criteria that 1 μm equals 2 kb and 1 pixel encompasses 340 base pairs. Statistical analysis was performed using Prism 5 software (GraphPad).
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6

Metastasis Quantification via Immunofluorescence

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Staining was conducted as previously published [11 (link), 22 (link)]. RFP staining: rabbit anti-RFP (Abcam, Cambridge, UK) 1:30 dilution, Alexa Fluor® 488 goat anti-rabbit secondary (Invitrogen); CDH1 staining: rabbit E-cadherin antibody (24E10; Cell Signaling Technology, Boston, MA, USA) 1:400 dilution. Internal negative controls were exposed to rabbit IgG or 10% goat serum rather than primary antibody. Images were captured on a Nikon TE2000 inverted microscope with IPLab software (BD Biosciences, Rockville, MD, USA), original magnification at 200× (RPF) or 400× (CDH1).
Metastases were calculated as a ratio of the number of RFP-positive cells versus the total amount of cells (determined by DAPI nuclear stain) per field of view. Points represent the ratio of RPF-positive cells versus DAPI for each section examined with mean for each group represented as horizontal black bar. SEM for each group indicated in red.
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7

Imaging Spheroid Cell Dissemination

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An Olympus IX81 ZDC inverted microscope was used to acquire phase contrast images of the spheroid both before and 36 hours after mechanical stimulation was applied. Live spheroids were imaged at 37°C with 5% CO2 within a custom stage incubator. Images were captured using a 10x/0.25NA CP-Achromat lens and SPOT Boost EM-CCD-BT2000 camera (Diagnostic Instruments) driven by IPLab software (BD Biosciences). The distance that cells disseminated from the spheroid was measured by drawing a line from the spheroid edge to the furthest cell disseminated using ImageJ (NIH).
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8

Meiotic Chromosome Preparation and FISH Analysis

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Young panicles of at meiosis stage were harvested and fixed in Carnoy's solution (ethanol:glacial acetic acid = 3∶1) for chromosome spreading. Meiotic chromosome preparation and immunofluorescence were performed as previously described [34] (link). The FISH procedure was performed as described [60] (link). Microscopy was conducted using a ZEISS A2 fluorescence microscope with a microCCD camera. Image capture and analysis was carried out using IPLab software (BD Biosciences).
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9

Fluorescence Microscopy with Thermal Regulation

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An upright Olympus B64 microscope with an attached short arc mercury lamp as an excitation light source was used. The excitation source and fluorescence emission are filtered through a filter cube (Ex. 577/10×, Em. 620/60 m, dichroic 585LP) from Chroma Technology Corp, Bellows Falls, VT. The emission light was detected by a CCD camera (Sensicam QE, Cooke Corporation, Romulus, MI) and captured images were analyzed using IPLab software (BD Bioscience, Rockville, MD). The setup used to seal the assay solution within fiber wells is described elsewhere [18] (link) and is shown in Figure S1A in File S1. In addition to the previous setup, a flat Peltier heating plate with an attached thermocouple was installed between the heat sink and the PDMS sheet. The Peltier plate and thermocouple are controlled and recorded by a computer via LabView (National Instruments, Austin, TX). The heating plate was calibrated prior to each experiment. The temperature variations within a single experiment did not exceed more than 0.5°C. By changing the current (3.0 A), voltage (4.0 V) and pulse duration (3 sec) it was possible to heat a sample to 47°C in 4 sec and cool it back to 20°C within 20 sec (Figure S1E in File S1).
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10

Quantifying Uterine Cell Composition

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BM-derived epithelial and stromal cells were counted by systematically examining the slides under ×40 magnification using an Olympus BX-51 microscope (Olympus). Areas of endometrium were randomly chosen and full-thickness counted. Multiple random slides of uterine sections from each mouse uterus were stained for use. Photomicrographs were taken using an Olympus BX51 fluorescence microscope. Images were captured with a digital camera, using IPLab software (BD Biosciences, www.bdbiosciences.com). Images were obtained using appropriate excitation and emission filter sets for 4′,6′-diamidino-2-phenylindole (nuclei), rhodamine (Y chromosome), fluorescein isothiocyanate (CD45, F4/80), and Cy5 (cytokeratin and vimiten). For quantitative trichrome analysis, five random sections of trichromatic slides were electronically scanned into an RGB image at magnification of 400X, which was subsequently analyzed using Image J (version 1.32j) software (National Institutes of Health, USA http://rsb.info.nih.gov/ij/). The amount of fibrosis (density and area) was then estimated from the RGB images. [15] (link) Quantitative of trichromatic sections were assigned in a double-blinded way by two people. Data presented are mean ± standard error of the mean. The Mann-Whitney Rank Sum test was used to compare the data.
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