Why does antigen retrieval matter for target validation?

Antigen retrieval unmasks epitopes in fixed tissue, enabling specific antibody binding essential for accurate target validation. Without it, fixation-induced crosslinking can obscure antigen sites, leading to false-negative results. This step ensures reliable detection of target expression in preclinical models.

How does permeabilization-blocking buffer support the discovery pipeline?

The permeabilization-blocking buffer allows antibody access to intracellular antigens while blocking non-specific binding sites. This reduces background noise and improves signal specificity in immunostaining. These conditions are critical for generating reproducible data used in early discovery decisions.

What do quantitative dependent variable measurements enable in imaging mass cytometry?

Quantitative measurements such as metal isotope signal intensity enable precise quantification of antigen expression levels across single cells. This data supports comparative analysis between treatment conditions or disease states. Such outputs are essential for assessing target engagement and pathway modulation in preclinical studies.

Why do replication requirements matter for cross-functional collaboration?

Replication ensures that immunostaining results are consistent across experiments, operators, and laboratories, building confidence in target validation data. Consistent protocols allow discovery, assay development, and translational teams to rely on shared datasets. This alignment reduces variability and accelerates decision-making in drug discovery programs.

What statistical analysis capabilities are required before implementation?

Before implementation, teams must establish capabilities for analyzing multiplexed protein expression data, including normalization, background subtraction, and single-cell segmentation. Statistical tools are needed to compare antigen expression across conditions with appropriate significance testing. These capabilities ensure that immunostaining outputs can be rigorously interpreted for target de-risking and biomarker identification.

Tissue Immunostaining for Imaging Mass Cytometry

JoVE Encyclopedia of Experiments

Biologische Technieken

0 weergaven • 3:33 min • January 15th, 2026

$$\rightleftharpoonup{xx}$$ $$\longleftharp{xx}$$, $$\longrightharp{xx}$$,

Place a glass slide with a fixed tissue sample into an antigen retrieval buffer and heat it.

The elevated temperature and the buffer's alkaline pH break the fixation-induced protein crosslinks, exposing antigen epitopes.

Cool the slide to prevent heat-induced tissue damage, then rinse to remove excess buffer.

Apply a hydrophobic barrier and place the slide in a humidity chamber.

Add a permeabilization-blocking buffer. The buffer's detergent permeabilizes cellular membranes, and blocking proteins mask non-specific binding sites to reduce background staining.

Remove excess buffer, add a metal-conjugated antibody cocktail, and incubate to allow antibody binding to specific antigens.

Wash the slide, removing unbound antibodies.

Add a metal-conjugated nuclear stain that enters the cells and binds to DNA.

Rinse off excess stain and dry the slide.

Using an optical scanner, obtain high-resolution images of the tissue's structural features, which aids in interpreting data from imaging mass cytometry analysis of the stained sample.

Begin with a five-micrometer pre-treated tissue section mounted over an immunostaining-compatible slide. Place the slides in a slide mailer.

For heat-induced epitope retrieval or HIER, add HIER buffer in the slide mailer until the tissue is completely immersed. Place the slide mailer in a decloaking chamber, and start the heating program.

After the program ends, place the slide mailer in a tray filled with cold water, and allow it to cool down. Rinse the slides with distilled water several times by gradually increasing the volume.

Remove the slides from the slide mailer, and wipe off the excess buffer. To prevent loss of blocking buffer and antibodies, encircle the tissue using a hydrophobic barrier pen.

Incubate the slides in a customized humidity chamber for one hour. For non-specific blocking, add blocking buffer to the slides in the humidity chamber. After the incubation period, remove the excess blocking buffer, and let the remaining buffer air-dry at room temperature.

Carefully add the antibody solution over the tissue and incubate overnight in a humidity chamber at four degrees Celsius.

Following incubation, wash the slide with Triton-containing PBS for 5 minutes. Finally, rinse the slide twice with PBS for 5 minutes each. Now, treat the tissue with the intercalator dye and incubate it in the humidity chamber at room temperature for thirty minutes.

Gerelateerde video's

0 Bekeken

Laatst bijgewerkt: 1 augustus 2026

Tissue Immunostaining for Imaging Mass Cytometry

Overzicht

Belangrijke onderdelen van het onderzoek

Wetenschapsgebied

Achtergrond

Doel van het onderzoek

Gebruikte methoden

Belangrijkste resultaten

Conclusies

Veelgestelde vragen

Executive Industry Relevance

Strategic Applications in Biopharma R&D

Early Discovery & Target Validation

Screening & Assay Development

Translational & Preclinical Research

Pipeline & Workflow Integration

Operational & Enterprise Impact

Implementation Considerations

Biopharma FAQs

Identificatie van Neutrophil Extracellular Traps in Paraffine-Embedded Feline Arterial Thrombi using Immunofluorescentie Microscopie

Combinatie van multiplex fluorescentie in situ hybridisatie met fluorescerende immunohistochemie op vers ingevroren of vaste hersensecties van muizen

Detectie van abnormaal prioneiwit door immunohistochemie

Kwantitatieve Multispectral Analyse Na Fluorescent Tissue Transplantatie voor Visualisatie van de Cel Origins, types en interacties

Monstervoorbereiding Mass Cytometry Analysis

Geautomatiseerde Multiplex immunofluorescentie paneel voor Immuno-oncologie Studies over formaline-vaste Carcinoma weefsel Specimens

Isolatie en kleuring van de muis huid keratinocyten voor celcyclus specifieke analyse van cellulaire eiwit expressie door massa Cytometrie

Visualisatie, kwantificering en mapping van immuuncelpopulaties in de tumormicro-omgeving

Een snelle methode voor multispectrale fluorescentiebeeldvorming van bevroren weefselsecties

Uitbreiding van het begrip van de tumormicro-omgeving met behulp van massaspectrometrie Beeldvorming van formaline-vaste en paraffine-ingebedde weefselmonsters