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14 protocols using glass bottomed culture dish

1

Embryo Preparation for Confocal Imaging

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Embryos were collected at 25 degrees overnight. They were then dechorionated with 50% bleach and washed with water. Embryos at the right stage were chosen under the fluorescent lamp and mounted depending on the experiment to be performed. For confocal imaging, the embryos were mounted on a glass-bottomed culture dish (Mattek), covered with 1% agarose and immersed in 1% PBS. For stretching experiments, the embryos were mounted on a glass-bottomed culture dish (Mattek) that had been coated with heptane glue, and immersed in 1% PBS. The imaging was carried using a Yokogawa CSU-X1 spinning disk on an inverted Olympus 1X81 microscope, with lens U plan S Apo 60x 1.45 Oil.
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2

Cell Death Imaging with HQ5 and Microscopy

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4T1-luc2 cells were cultured in a glass bottomed culture dish (MatTek Corp.) until 80% confluent. Cell death was induced by incubation with GA (3 μM, 1 h). Subsequently, the cells were washed gently with PBS and incubated in the presence of 80 nM HQ5 in the dark for 15 min at RT. AVF and PI were used in accordance with the manufacturer's protocols. Afterwards, samples were imaged using a Leica TCS SP5 confocal microscope (Leica).
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3

Live-cell Imaging of HeLa Cells

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HeLa cells were cultured in a glass-bottomed culture dish (MatTek). During imaging, cells were maintained in CO2-independent media (Gibco) containing 10% (vol/vol) FBS and 1% (2 mM) glutamine in a sealed chamber at 37 °C. Images of living cells were taken with a DeltaVision RT system (Applied Precission). Images were prepared for publication using Adobe Photoshop. Measurements and statistical analyses were calculated using ImageJ software (NIH) and GraphPad Prism.
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4

Measuring NMB Release from Sensory Neurons

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To detect NMB release from sensory neurons, TG neurons were dissociated and seeded at high density on the 7 mm glass window of a glass-bottomed culture dish (MatTek Corporation). Neurons were cultured at 37 °C for 24 hours and were gently rinsed twice with warm Ca2+- and Mg2+-free HBSS before test. To activate the neurons, 50 μL of CIB containing vehicle or stimulants were gently added onto the neurons and incubated at 37 °C for 5 min before the supernatant was collected. NMB concentration in the supernatant was then measured by ELISA (LifeSpan Biosciences, Cat#:LS-F4262) using the manufacturer’s supplied standards and their recommended protocol.
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5

Live-Cell Fluorescence Microscopy Imaging

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Fluorescence microscopy images were obtained by using the microscope system (DeltaVision; Applied Precision) comprising a wide-field inverted epifluorescence microscope (IX71; Olympus), a Plan Apochromat 60×, NA 1.4, oil immersion objective (Olympus). DeltaVision image acquisition software (softWoRx 3.3.0; Applied Precision) equipped with a charge-coupled device camera (CoolSNAP HQ; Photometrics) was used. Live cells were imaged in a glass-bottomed culture dish (MatTek Corporation) coated with soybean lectin and incubated at 27°C for most of the strains or at 36°C for the temperature-sensitive mutants. The latter were cultured in rich YE5S media until mid–log phase at 27°C and subsequently shifted to the restrictive temperature of 36°C before observation. To keep cultures at the proper temperature, a temperature-controlled chamber (Precision Control) was used. The sections of images at each time point were compressed into a 2D projection using the DeltaVision maximum intensity algorithm. Deconvolution was applied before the 2D projection. Images were taken as 10–14 sections along the z axis at 0.3-µm intervals; they were then deconvolved and merged into a single projection. Captured images were processed with Photoshop CS5 (version 12.0; Adobe).
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6

Microscopic Visualization of Sporulating Cells

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Cells were induced to sporulate by resuspension in SM medium (Sterlini and Mandelstam, 1969 (link)). At various time points, 100 μl of culture was harvested and resuspended in 10 μl SM medium containing 5 μg·mL-1 fluorescent dye FM4–64 to visualize membranes, and placed on a glass- bottomed culture dish (Mattek) 3 μl was spotted on a glass bottom culture dish (Mattek) and covered with a 1% agarose pad made with SM medium. Cells were viewed at room temperature with a DeltaVision Core microscope system (Applied Precision/GE Healthcare). Seven planes were acquired every 200 nm, and the data were deconvolved using SoftWorx software (Eswara et al., 2018 ). Linescan analyses were performed using Fiji.
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7

Oocyte Activation Protocols for Live Imaging

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Oocytes were activated with different, but equivalent preparation methods:

Dissected oocytes were placed in series 95 halocarbon oil (KMZ Chemicals) on 22 × 40 coverslips, aligned parallel to each other to maximize the acquisition area for imaging and left to settle for 10–15 min before addition of AB and imaging (Derrick, York‐Andersen, & Weil, 2016); AB contains 3.3 mM NaH2PO4, 16.6 mM KH2PO4, 10 mM NaCl, 50 mM KCl, 5% polyethylene glycol 8000, 2 mM CaCl2, brought to pH 6.4 with a 1:5 ratio of NaOH:KOH (Mahowald, Goralski, & Caulton, 1983).

Oocytes were dissected in IB (Page & Orr‐Weaver, 1997) in a glass‐bottomed Petri dish and activated by replacing IB with modified RB. IB contains 55 mM NaOAc, 40 mM KOAc, 1.2 mM MgCl2, 1 mM CaCl2, 110 mM sucrose, 100 mM HEPES in ddH2O. IB is adjusted to pH 7.4 with NaOH and filter sterilized. RB contains 55 mM NaOAc, 8 mM KOAc, 20 mM sucrose, 0.5 mM MgCl2, 2 mM CaCl2, 20 mM HEPES in ddH2O. RB was adjusted to pH 6.4 with NaOH and filter sterilized (Hu & Wolfner, 2019);

For the high‐resolution 3D live imaging oocytes were mounted in a glass‐bottomed culture dish (MatTek) in Schneider's insect culture medium (GIBCO‐BRL) with a 1 mm2 coverslip on the oocyte. For activation, Schneider's medium was removed and replaced with AB (Weil et al., 2008).

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8

Visualizing Microtubule Dynamics in Live Cells

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Cells were cultured in a glass-bottomed culture dish (MatTek, MA) pretreated with collagen. Then, the cells were transfected with mCherry-UtroCH/GFP- tubulin and double blocked by Thymidine as described previously. About 8 hours after release, DME medium was replaced with CO2- independent medium (Invitrogen) containing 10% FBS and 1% glutamine in a sealed chamber at 37°C. FBS was added according to drug property, as Lat B is unstable in medium with FBS. MG132 was added 5 minutes before the addition of drugs when the cells entered metaphase. We acquired each image every 1 minute over a timeframe of 1 hour or 1.5 hours with Delta-Vision Real Time System built on an Olympus IX-70 inverted microscope base. The live-cell images were also processed with Image-J.
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9

Fission Yeast Spot Assays and Microscopy

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Fission yeast strains used in this study are listed in Table S5. Standard fission yeast methodologies were followed (Moreno et al., 1991 (link)). Spot assays were carried out by spotting 5–10 μl of cells at a concentration of 2×106 cells/ml after 10-fold serial dilutions onto rich YE5S plates with or without a drug (10 µg/ml TBZ). C-terminal tagging and gene disruption were performed using PCR-generated fragments as described previously (Bähler et al., 1998 (link); Sato et al., 2005 (link)). The minichromosome loss assay was carried out as described previously (Niwa et al., 1989 (link); Tange et al., 2016 (link)).
Fluorescence microscope images were obtained using the DeltaVision microscope system (Applied Precision, Inc.) with a cooled CCD camera CoolSNAP.HQ (Photometrics). Live cells were imaged in a glass-bottomed culture dish (MatTek Corporation) coated with soybean lectin.
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10

Live Cell Imaging of Mitosis

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HeLa cells were grown in glass-bottomed culture dish (MatTek, MA). During imaging, cells were maintained in CO2-independent medium (GIBCO BRL) containing 10% FBS and 1% glutamine in a sealed chamber heated to 37 °C. Images at single focal plane were acquired by a DeltaVision deconvolution microscope (Applied Precision Inc.) with a 60X/NA 1.4 PlanApochromat objective (Olympus). To trace chromosomes or kinetochores in mitosis, frames were collected at 4- or 5-min intervals. For tracking MT tips, frames were acquired with a 3-sec interval.
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