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Multiplex Immunofluorescence Staining of Paraffin-Embedded Tissue: Coverslip Mounting of Tissue Sections Improves
Gitte A Pedersen1, Søren H Elsborg1, Rikke Nørregaard1
1Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.
Insights
This study introduces a cost-effective multiplex immunofluorescence (IF) protocol using mild reagents and indirect antibody labeling. Mounting tissue sections on gelatin-coated coverslips improves Z-axis resolution in widefield imaging.
Area of Science:
- Cell Biology
- Microscopy Techniques
- Histology
Background:
- Immunofluorescence (IF) microscopy is crucial for visualizing protein expression and localization within cells and tissues.
- Multiplex IF allows for simultaneous or sequential detection of multiple targets in a single sample, providing comprehensive spatial information.
- Existing multiplex IF methods often employ harsh chemical treatments or costly reagents, potentially compromising tissue integrity and signal fidelity.
Purpose of the Study:
- To develop and present a detailed, cost-effective protocol for multiplex immunofluorescence (IF).
- To optimize multiplex IF by employing mild stripping buffers and indirect antibody labeling techniques.
- To enhance Z-axis optical resolution in widefield imaging for paraffin-embedded tissue sections.
Main Methods:
- Utilized indirect antibody labeling for sequential staining of tissue sections.
- Developed and applied a mild stripping buffer to minimize tissue damage between staining cycles.
- Mounted paraffin-embedded tissue sections onto gelatin-coated coverslips.
- Employed widefield imaging for Z-axis optical resolution enhancement.
Main Results:
- Successfully implemented a cost-effective multiplex IF protocol.
- Demonstrated that the mild stripping buffer preserves tissue integrity and signal quality.
- Showcased improved Z-axis optical resolution by mounting sections on gelatin-coated coverslips.
- Achieved high-quality multiplex staining with reduced reagent costs.
Conclusions:
- The presented protocol offers a viable and economical alternative for multiplex IF.
- The method effectively balances comprehensive tissue analysis with reagent cost and tissue preservation.
- Enhanced Z-axis resolution via specialized mounting techniques improves 3D visualization in widefield microscopy.
Abstract:
Immunofluorescence (IF) microscopy is essential for studying protein expression and localization. Multiplex IF enables sequential staining of the same tissue section for comprehensive analysis but often involves harsh treatments or expensive reagents that can damage tissues and reduce signal quality. Here, we present a detailed protocol for multiplex IF using indirect antibody labeling, a mild stripping buffer, and cost-effective reagents. Importantly, mounting paraffin-embedded tissue sections on gelatin-coated coverslips enhances Z-axis optical resolution in widefield imaging.
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