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Invitrogen evos fl auto imaging system

Manufactured by Thermo Fisher Scientific
Sourced in United States

The Invitrogen EVOS FL Auto Imaging System is a compact, automated, and fluorescence microscope designed for live-cell imaging. The system features a motorized stage, autofocus capabilities, and multiple LED light sources for a range of fluorescence applications.

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6 protocols using invitrogen evos fl auto imaging system

1

Multicolor Immunofluorescence and IHC Analysis

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Frozen tissue sections were rehydrated and blocked [5% goat serum (Sigma-Aldrich), 1% BSA, 1.5 M Tris HCl] for 30 min, as previously described (Seifert et al. 2016 ). Anti-γδ TCR (Biolegend), anti-α-SMA, and anti-Cytokeratin 19 (both abcam) were applied at 4 °C overnight. Secondary antibodies against Mouse IgG labeled with Alexa Flour 633, Rabbit IgG labeled with Alexa Fluor 488, and Guinea Pig IgG labeled with Alexa Fluor 568 (all Thermofisher) were used. Nuclei were counterstained with 4′,6-diamidino-2-phenylindole (DAPI, Vector Labs) and embedded in Faramount Mounting Medium (Agilent Dako). Images were acquired on a confocal Leica SP5 MP. For immunohistochemistry, Anti-γδ TCR was applied for 12 h, followed by incubation with secondary antibodies for 30 min. Purified Mouse IgG1 was used as isotype control. ImmPACT™ DAB Peroxidase (Vector Labs) was used according to the manufacturer’s instructions. Slides were imaged on Invitrogen EVOS FL Auto Imaging System (Thermo Fisher Scientific). Quantification was performed by assessing ten hotspots as high-power fields (HPF; 20 ×) per slide.
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2

In situ Hybridization and Immunodetection of ZmNF-YA8

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In situ hybridization and immunological detection were performed as described by Zhang et al. (Zhang et al., 2022b (link)). In brief, a 120-bp fragment, corresponding to the coding region of ZmNF-YA8, was PCR amplified and cloned into the Promega pGEM-T vector (Cat No. A1360, Promega, Madison, WI, USA). Following sequence verification, PGEM-T-ZmNF-YA8 was linearized with SphI and SalI, which was used as the DNA template for in vitro transcription using a DIG Oligonucleotide Tailing Kit (Cat No. 3353583910, Roche Diagnostics, Basel, Switzerland), which contains T7 and SP6 RNA polymerases and digoxin (DIG)-labeled UTP, generating DIG-labeled sense and antisense RNA probes (Table S1). These probes were used for in situ hybridization, as previously described (Xu et al., 2005 (link)). Slides were mounted and viewed using an Invitrogen EVOS® FL Auto Imaging system (Thermo Fisher Scientific) after being exposed for 12-15 h.
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3

Doublecortin Immunohistochemistry of Brain Sections

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Post-fixed brains were incubated with 30% sucrose in PBS for 1 d at 4 °C, which was repeated once with 30% sucrose in PBS solution. The brains were frozen using dry CO2 ice powder and sliced into 30-μm sagittal sections before being transferred to gelatin-coated slides [48 (link)]. At room temperature, the sections were incubated with 5% bovine calf serum (1 h) and, subsequently, with doublecortin primary antibody (1:100, 2 h), They were rinsed in PBS twice for 15 min each, followed by incubation with Alexa Fluor 488 secondary antibody (Ex/Em = 490/525 nm, 1:200, 2 h) and two additional PBS rinses for 15 min each. The samples were topped in Fluoromount™ Aqueous Mounting Medium and covered with glass coverslips for microscopic imaging. The data were collected using the Invitrogen EVOS FL Auto Imaging System (Thermo Fisher Scientific, Waltham, MA, USA) with a 30× objective. The number of doublecortin-positive stained neurons was counted in the same area of three slides per animal and three animals per group.
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4

Photothermal Therapy of U87 Spheroids

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U87 cells were added to low adherence, round bottom wells in a 96 well plate at a density of 4,000 cells/well and allowed to recover for 4 days without perturbation. For one set of experiments, spheroids were transferred to low adherence, 6 well plates and incubated for 24 h with 100 μg/mL 2% DSPE-PEG MWCNT in growth media. The spheroids were washed with PBS to remove excess MWCNTs, and groups of 4–6 spheroids per treatment condition were transferred to 48-well tissue culture plate and exposed to NIR as above for 0–300 s. For other experiments, groups of 4 spheroids were transferred to 48 well plates and suspended in 500 μL of dye free DMEM alone or containing 20 μg/mL 2% DSPE-PEG MWCNT and exposed to NIR as above for 0–90 s without removing the MWCNTs. Spheroids were then washed in PBS and transferred to 6 well plates in growth media with 4–6 spheroids per well. Media was changed every 2–3 days. Spheroid size was monitored over time and photographed using Invitrogen™ EVOS™ FL Auto Imaging System (Thermo Fisher). Spheroid area was quantified using Image J software (https://imagej.nih.gov/ij/). Briefly, regions of interest corresponding to individual spheroids were identified and total area in each region (in pixels) was calculated.
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5

Doublecortin Immunofluorescence in Brain Slices

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Post-fixed brain hemispheres were submerged in 15% sucrose for 12 h and subsequently with 30% sucrose for another 12 h at 4 °C. The brains were frozen using dry CO2 ice and sliced into 30 μm sagittal sections. At room temperature, sections were blocked with 6% bovine calf serum and incubated with doublecortin primary antibody (1:200 in cell staining buffer, 2 h), rinsed in cell staining buffer twice for 15 min each, and then incubated with Alexa Fluor 488 secondary antibody (Ex/Em = 490/525 nm, 1:200 in cell staining buffer, 2 h) and two additional rinses in staining buffer for 15 min each. Samples were submerged in Fluoromount™ Aqueous Mounting Medium and shielded with glass coverslips for microscopic imaging. The images were photographed using the Invitrogen EVOS FL Auto Imaging System (Thermo Fisher Scientific, Waltham, MA, USA) with a 20× objective. Cells were counted within an identical area of 100 µm wide across all tissue sections, as shown in the images.
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6

MWCNT-Induced Vascular Disruption in HBMECs

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HBMECs were grown as a monolayer (50,000 cells/well) in a 24 well plate, and then were treated with 25 μg/mL MWCNTs for 16 hr. The cells were then washed, trypsinized, counted and plated in vessel forming conditions. To form HBMEC vessels, Matrigel (35 μL per well) was added to wells of a 96 well plate at a final concentration of 9.8 mg/mL and allowed to solidify at 37 °C for ~20 min. Once matrigel solidified, HBMECs were plated at a density of 4,000–10,000 cells per well and allowed to form vessel-like structures. HBMECs were treated with 25 μg/mL of each MWCNT preparation. Changes in morphology of vessel-like structures were monitored over time and photographed using Invitrogen EVOS FL Auto Imaging System (Thermo Fisher) at the indicated time points.
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