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Ae1 ae3

Manufactured by Thermo Fisher Scientific
Sourced in United States

The AE1/AE3 is a laboratory instrument designed for the detection and analysis of specific proteins. It utilizes immunohistochemical techniques to identify the presence and distribution of target proteins within cells or tissue samples.

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11 protocols using ae1 ae3

1

Molecular Subtyping of Cancers via IHC

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Immunohistochemical (IHC) staining was performed incubating 4 µm FFPE sections in 10 mmol/L citrate buffer (pH 6.0) at 120°C for 5 minutes for antigen retrieval. Endogenous peroxidase was neutralized using EnVision FLEX Peroxidase‐Blocking Reagent (Dako) for 10 minutes. Tissue sections were blocked with 3% bovine serum albumin and incubated with the primary antibodies overnight at 4°C. Primary antibodies used were FRMD6 (Sigma‐Aldrich), ZEB1 (Sigma‐Aldrich), HTR2B (Sigma‐Aldrich), AE1AE3 (Thermo Scientific), CDX2 (Novus Biologicals), SRSF3 (Abcam) and SERPINA1 (Sigma‐Aldrich). After incubation with the EnVision FLEX + mouse or rabbit linker (Dako), EnVision FLEX/HRP (Dako) was used as the secondary antibody for 1 hour at room temperature, followed by 3,3'‐diaminobenzidine (DAB) staining (Dako). CMS molecular classification was performed according to Thrin et al,14 analysing the intensity and content of FRMD6, ZEB1, HTR2B, AE1AE3 and CDX2. SRSF3 and SERPINA1 tumoral epithelial expression was categorized as high (intense staining) and low expression (moderate and negative staining). Individual cores were scored by trained pathologists (CVP and SGL).
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2

Quantitative Multiplex Immunofluorescence for Tumor Analysis

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Quantitative multiplex immunofluorescence (qmIF) was performed on formalin-fixed paraffin-embedded (FFPE) tissue sections of pre-treatment tumor samples to measure biomolecular targets in defined tissue compartments. Validated and standardized protocols for qmIF staining and signal measurement were carried out as previously described (13 (link)-15 (link)). Primary unconjugated antibodies against CD8 (BioLegend, C8/144b Mouse IgG1) and TCF1 (Cell Signaling, C63D9 Rabbit IgG) were coincubated with tissue and then sequentially detected with horseradish peroxidase (HRP)-conjugated species-specific secondary antibodies (Goat Anti-Mouse IgG1 HRP, Abcam, ab97240; and EnVision+ Single Reagent HRP Rabbit, Agilent/Dako, K400311-2; respectively). Tyramide Signal Amplification was performed with HRP activators Cy3 Tyramide (Perkin Elmer, SAT704A001KT) for CD8, and Cy5 tyramide (Perkin Elmer, SAT705A001KT) for TCF1. Tumor epithelium was identified with a cocktail of monoclonal antibodies to pan-cytokeratins (AE1/AE3, ThermoFisher; 53-9003-82) directly conjugated to AlexaFluor 488. DAPI was used to identify cell nuclei. Coverslips were mounted with Prolong Gold (Molecular Probes), and whole slide imaging was performed on a Vectra Polaris (Akoya) using the 20X objective.
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3

Immunofluorescence Detection of Cytoskeletal Proteins

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Cells were cultured on coverslips for immunofluorescence experiments.
Samples were fixed in methanol chilled to −20°C (for guinea pig
cells) or 4% paraformaldehyde (for human cells), permeabilized with 0.25% Triton
X-100, and incubated with cytokeratin pan type I/II monoclonal antibody
(AE1/AE3, ThermoFisher) overnight. After washing, the coverslips were incubated
with Alexa Fluor 488 AffiniPure Donkey Anti-Mouse IgG (Jackson ImmunoResearch)
and counterstained with ProLong Diamond Antifade Mountant with DAPI
(ThermoFisher). A Nikon Eclipse upright fluorescence microscope was used for
imaging.
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4

Characterization of Epidermal Equivalents

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The fixed epidermal equivalents of cultured keratinocytes derived from hESCs and postnatal epidermis by air-lifting culture were routinely processed into 5 μm thick paraffin-wax-embedded sections and haematoxylin and eosin (HE) staining was performed using a standard protocol. Expressions of E-cadherin (CDH1), pan-keratins (KRTs), KRT14, keratin10 (KRT10), IVL, TP63, and vimentin (VIM) were analyzed by immunohistological methods. The sections were treated with mouse monoclonal anti-CDH1 (1:100, 36/E-Cadherin, Becton Dickinson, NJ, USA), mouse monoclonal anti-KRTs (1:100 dilution, AE1/AE3, Thermo Fisher Scientific), mouse monoclonal anti-KRT14 (1:100, LL002, Abcam, Cambridge, UK), rabbit polyclonal anti-KRT10 (1:100, BioLegend, CA, USA), mouse monoclonal anti-IVL (1:1000, SY5, Sigma–Aldrich), mouse monoclonal anti-TP63 (1:100, 4A4, Abcam), and mouse monoclonal anti-VIM (1:100, Vim 3B4, Dako, Agilent Technologies, CA, USA) at room temperature for 90 min and were stained with peroxidase-conjugated secondary antibodies (Nichirei Bioscience, Tokyo, Japan) in accordance with the manufacture's suggested protocol. Human dermal and epidermal tissues were used for negative control of immnohistological analysis, and the results are shown in Supplemental Fig. 2.
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5

Immunostaining of Cytokeratins and Actin Cytoskeleton

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The immunostaining was performed to confirm the development of cytokeratins (AE1/AE3, 1:250, Thermo Scientific) and the integrity of the actin cytoskeleton (phalloidin-tetramethylrhodamine B isothiocyanate, 1:500, Sigma-Aldrich) in the experiment samples. Immunohistochemistry with the pancytokeratin marker was used to study the development of cytokeratins and urothelial epithelium in urothelial cells as well as after 4 months of in vivo follow-up. The samples were mounted with 4% paraformaldehyde and probed overnight with pancytokeratin primary antibody dilutions. The samples were then treated in a combination of secondary antibody (1:800 Alexa-488 donkey, green fluorescence) and phalloidin the next day. Subsequently, the cell nuclei were dyed with DAPI (1: 2000, Sigma-Aldrich) and examined using a fluorescence microscope (Olympus) [29 ].
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6

Urothelial Epithelium Evaluation via Immunohistochemistry

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Immunohistochemistry with the pancytokeratin marker was used to study the urothelial epithelium after 2, 4 and 16 weeks of follow-up. Briefly, the samples were fixed with 5 % paraformaldehyde and embedded in paraffin. The antigen retrieval was performed by microwaving the samples in 10 mM EDTA buffer (pH 9, Sigma-Aldrich), after which the samples were blocked in 3 % hydrogen peroxide (Sigma-Aldrich). The samples were incubated overnight in diluted primary antibody (1:100, AE1/AE3, Thermo Fisher Scientific, MA, US). On the following day, the secondary antibody (1:200, goat anti-mouse IgG, Thermo Fisher Scientific) was used to detect to the primary antibody.
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7

Bladder Construct Perfusability Evaluation

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After incision of the skin and capsule pouch, the expander was removed, and the bladder construct along with surrounding capsule tissue was exposed. To examine the perfusability of the bladder construct, the ipsilateral femoral artery was separated and injected with 20 ml heparinized Indian ink. Then the construct was harvested and placed in 4% paraformaldehyde. After dehydration and embedding, the tissue was cut into 4 μm‐thick sections for HE staining, immunohistochemistry, and immunofluorescence according to standard staining protocols. Antibodies against AE1/AE3 (1:500; Invitrogen, USA), CD31 (1:500; Novus, USA), desmin (1:100; Invitrogen), alpha‐smooth muscle actin (α‐SMA; 1:500; Abcam, England) and Ki67 (1:500; Abcam) were used for immunohistochemistry. For immunofluorescence, CD31 (1:500; Novus) was applied. In addition, normal bladder tissue was obtained for HE and immunohistochemistry staining.
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8

Immunohistochemical Analysis of Tissue Samples

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All the samples were fixed in 4% paraformaldehyde followed by embedding and sectioning. Then PSR staining and immunohistochemical staining were performed according to standard protocols. For immunohistochemical staining, antibodies against AE1/AE3 (1:500; Invitrogen), CD31 (1:500; Novus), desmin (1:100; Invitrogen), alpha‐smooth muscle actin (α‐SMA; 1:500; Abcam), and S100β (1:200; Novus) were applied. In addition, an antibody against desmin (1:100; Invitrogen) was used for immunofluorescence. The results were quantified by Image‐Pro Plus 5.1 software for each tissue sample.
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9

Immunostaining of Endometriotic Lesions

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Frozen endometriotic lesions were embedded in optimal cutting temperature compound and sectioned at a 5 μm thickness. Then, the sections were washed with PBS, permeabilized with 0.2% Triton X-100, washed with PBS for 10 minutes, and blocked with 10% FBS for 1 hour. The sections were then incubated with primary antibodies overnight at 4°C, washed with PBST, and then, where required, stained with Alexa Fluor–conjugated secondary antibodies for 1 hour at room temperature. The following primary antibodies were used: Goat Anti-human IL-33 (1:40, R&D Systems, AF3625), Mouse Anti-human Vimentin (1:400, Cell Signaling Technology, clone D21H3), Mouse Anti-Pan cytokeratin (1:40, Cell Signaling Technology, clone AE1/AE3), Rabbit Anti-goat Alexa Fluor 647 (1:200; Invitrogen, A27018). Immunostained tissue sections were imaged using the Leica TCS SP8 confocal microscope. Images were taken in a Z-stack (1.20 μm; Z dimension) and tile scan (12 tiles, 580 μm × 435 μm each tile; x and y dimensions) acquisition mode. Two to 3 fields per preparation were imaged using HC PL APO CS2 ×63/1.40 oil objective and LAS-X Software (Leica Microsystems).
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10

CTC Isolation and Characterization by Immunofluorescence

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CTCs are isolated according to their physical properties by Ficoll density gradient centrifugation. In short, whole blood is layered on Ficoll and then centrifuged for 30 min at room temperature. Ery-lysis is done for 3 min and isolated peripheral mononuclear blood cells are cyto-centrifuged onto glass slides (500000 cells per slide)35 (link). For detection of CTCs, immunofluorescence stainings were performed using the pan-cytokeratin antibody (1:80; AE1AE3, eBioScience) and ALDH1 antibody (1:100; ab52492, Abcam) in combination with a species-specific secondary antibody (1:200; anti-rabbit-Alexa488, LifeTechnologies), and a CD45 antibody (1:150; Clone HI30, BioLegend). Cells were fixed with 0.5% para-formaldehyde and blocked with AB serum. All antibodies were incubated for 45 min at room temperature except for ALDH1 (overnight, 4 °C). Glass slides were covered and manually analysed by fluorescence microscopy.
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