Easy But Expensive Mycoplasma Detection Kit

Harvard Medical School
Neurobiology
Postdoctoral Fellow

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Company:

Lonza

Product Name:

MycoAlert Mycoplasma Detection Kit

Catalog Number:

LT07-118

Cultured cell lines, primary cells should be periodically tested for Mycoplasma contamination. Application of regular antibiotic does not combat Mycoplasma and often the infection does not lead to any visible consequence. However, infected cells can grow slower, this bacterium can affect vector production, transfection, transduction etc. Lonza provides this simple kit for Mycoplasma detection. We tested 42 different cell culture supernatants from various cell lines, primary cells, and iPS cells. Out of 42 samples, 25 were Mycoplasma negative (59%), 8 were positive (19%) and 9 were borderline (21%). The high number of borderline samples makes this assay less robust. In general, most borderline cells turn out to be negative upon re-testing.

Experimental Design and Results Summary

Application

Mycosplama detection

Starting Material

Cell culture supernatant

Protocol Overview

1. Spin down cells at 200g for 5 min (1-2 mL media)2. Add 100 uL MycoAlert reagent, wait 5 min.3. Measure luminescence (read A).4. Add 100 uL MycoAlert substrate, wait 10 min.5. Measure luminescence (read B).6. Divide read B/read A. If >1.2, you have a positive sample.

Tips

Make sure you don't freeze thaw the reagent more than once.

Results Summary

We tested 42 different cell culture supernatants from various cell lines, primary cells, and iPS cells. Out of 42 samples, 25 were Mycoplasma negative (59%), 8 were positive (19%) and 9 were borderline (21%).

Additional Notes

None

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Summary

The Good

Easy.

The Bad

Expensive. Lot of samples are borderline (which usually turn out to be negative).

The Bottom Line

This is a simple assay but needs a luminometer. The drawbacks are price (there are several way cheaper alternatives, e.g. PCR-based). 20% of the time it gave a borderline result, upon retesting these samples are usually negative.

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