Thermo Fisher Scientific mCherry Antibody Compatible with BaseScope

Physiology and Biophysics
State University of New York at Buffalo
Postdoctoral Researcher

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Company:

Invitrogen / Thermo Fisher Scientific

Product Name:

mCherry Polyclonal Antibody

Catalog Number:

PA5-34974

Clone Number:

Polyclonal

We utilize the BaseScope RED Assay combined with immunostaining to assess the expression of the gene of interest (mRNA transcripts, specifically Oprm1 mRNA) in mouse astrocytes. Oprm1 is expressed in mouse astrocytes and can regulate energy metabolic pathways in astrocytes. We utilize a mouse model with Oprm1 deficiency in astrocytes to study the underlying mechanisms.

Experimental Design and Results Summary

Applications

Immunofluorescence

Sample

Mouse brain samples (15 um thickness sections)

Primary Incubation

1:100 (overnight at 4°C) in Antibody Diluent (ACD; Bio-Techne, REF: 323160, part of the kit).

Blocking Agent

Co-Detection Blocker (ACD; Bio-Techne, REF: 323170, part of the kit).

Secondary Incubation

1:1000 Alexa 633 (anti-rabbit) for 1 h at room temperature

Tertiary Incubation

N/A

Detection

Leica TCS SP8 STED/FLIM/Lightsheet Confocal Microscope

Results Summary

We used an adeno-associated virus, rAAV5/GFAP-GFP-Cre, to knock down the expression of Oprm1 in astrocytes of the hippocampus, a brain region particularly enriched with mu opioid receptors (Oprm1 encodes mu opioid receptors). We quantified the efficiency of knockdown with this AAV in hippocampal astrocytes by measuring Oprm1 mRNA transcripts in the transduced astrocytes. We used the mCherry antibody to visualize the transduced astrocytes.Image: Representative confocal image of dual BaseScope in situ hybridization for Oprm1 mRNA (red punctate dots) and GFAP (green), and mCherry (cyan) immunofluorescence. Immunostaining with an mCherry antibody was required, as BaseScope reagents quenched the viral fluorescence. Section was counterstained with DAPI fluorescent dye to visualize tissue morphology, specifically cell nuclei (blue). Image was obtained using a 63× objective; scale bar: 20 μm.

DOI or PMID #

Additional Notes

N/A

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Summary

The Good

The antibody is compatible with the BaseScope RED assay, which involves the use of strong proteases. Not all antibodies can withstand the protease treatment and still produce a robust signal.

The Bad

A low dilution (1:100) is required for this specific assay (BaseScope with Immunostaining Co-detection workflow).

The Bottom Line

The antibody gave a strong and robust signal, was compatible with the harsh BaseScope reagents, and allowed us to visualize the transduced astrocytes. We will definitely use it again.

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