Stains Well, but Any Changes Are Subtle

Immunology
Columbia University
Graduate Student

Overall

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Company:

BioLegend

Product Name:

Brilliant Violet 421™ anti-human CD39

Catalog Number:

328214

The goal of this project was to look for changes in CD39 and related molecules in response to hypoxia on human tumor cell lines. CD39 expression has previously been shown to increase with hypoxia, so this flow assay was used to validate that finding.

Experimental Design and Results Summary

Applications

Flow Cytometry

Sample

DU145 Cell Line

Primary Incubation

1:50 for 20 mins at RT

Blocking Agent

N/A

Secondary Incubation

Fix/Perm at RT for 40 mins

Tertiary Incubation

N/A

Detection

Flow Cytometry

Results Summary

DU145 human prostate cancer cell lines were either grown at regular cell culture conditions (5% CO2 at 37C) or in a hypoxia incubator at 5% O2 at 37C for 48 hours. Afterwards, cells were trypsinized and stained with this BV421 CD39 antibody prior to fixation and permeabilization for intracellular targets. Hypoxia is known to induce CD39 expression, but the changes seen at 1:50 dilution for this antibody between the hypoxia condition and the regular culture conditions are very small. There is clearly a small shift towards increased CD39 expression, but it is very subtle. Subsequent experiments using 1:25 and 1:10 dilutions of the antibody led to similar results without any increase in the fluorescence, so 1:50 was used for subsequent experiments.

DOI or PMID #

N/A

Additional Notes

N/A

Related Categories

Image Gallery

Summary

The Good

Good color easy to compensate

The Bad

Changes in expression are subtle

The Bottom Line

This antibody was used at 1:50 on cells that were exposed to hypoxic conditions, and the expression of CD39 as quantified by flow only increased by a minuscule amount. We have yet to find a better antibody with better resolution, however, so this one is fairly cost-effective and generates results that can be better visualized through histograms and when normalized to the expression of vehicle treated cells rather than looking at the flow dot plots.

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