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Updated: Jul 6, 2026
Isolation and Quantification of Botulinum Neurotoxin From Complex Matrices Using the BoTest Matrix Assays
Published on: March 3, 2014
[Measurement of botulinum toxin activity: towards a new cellular culture assay?]
Gregoire Khairallah1, Jean-Baptiste Andreoletti, Emmanuel Jover
1Service de chirurgie maxillofaciale, hôpital Central, CHU de Nancy, 29, avenue du Maréchal-de-Lattre-de-Tassigny, 54000 Nancy, France. Gregoire@Khairallah.com
Unlabelled:
The actual gold standard of Botulin A toxin (BoTx A) batches qualification is the mouse lethality assay. With this assay it is nevertheless impossible to set a therapeutic value unit.
Aims:
The goal of this research was to study the effects of BoTx A increasing concentrations on glutamatergic rat neurons.
Experimental Procedure:
We studied the glutamate release with increasing concentrations of BoTx A. We also studied the BoTx A target cleavage with a western blot technique.
Results:
Our results proved that it is possible to establish a dose-response - like curve of BoTx A effects on glutamate release. Moreover the cleavage of the target protein was visible for the same toxin concentrations that inhibited the glutamate release.
Conclusion:
This technique could be the first step toward a new way of setting a better pharmaceutical profile for toxin batches.
