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Cholinesterase assay by an efficient fixed time endpoint method.

Mónica Benabent1, Eugenio Vilanova1, Miguel Ángel Sogorb1

  • 1Instituto de Bioingeniería, Universidad Miguel Hernández de Elche, Alicante, Spain.

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|July 8, 2015
PubMed
Summary
This summary is machine-generated.

This study presents a modified Bellino method to accurately measure cholinesterase (ChE) activity by stopping the reaction with SDS and DTNB. This optimized assay is suitable for high-throughput screening and complex kinetic studies of enzyme inhibitors.

Keywords:
AcetylcholinesteraseAssayEnd-pointFixed timeSodium dodecyl sulphate

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Area of Science:

  • Biochemistry
  • Enzymology
  • Analytical Chemistry

Background:

  • Cholinesterase (ChE) assays are crucial for studying enzyme inhibition.
  • Ellman's method is widely used but has limitations regarding chromogen interference.
  • Existing methods like Bellino's offer improvements but can be further refined.

Purpose of the Study:

  • To propose a modified Bellino method for acetylcholine-hydrolyzing activity determination.
  • To address limitations of existing cholinesterase assay methods.
  • To develop a robust assay for high-throughput and complex kinetic studies.

Main Methods:

  • A modification of Bellino's method was developed.
  • The reaction was stopped using a mixture of sodium dodecyl sulfate (SDS) and 5,5'dithiobis nitro benzoic acid (DTNB).
  • Assay adaptation by modifying enzyme concentration for parallel sample processing.

Main Results:

  • The modified method allows for precise determination of cholinesterase activity.
  • Stopping the reaction prevents potential chromogen interference with enzyme activity.
  • The assay is adaptable for simultaneous analysis of numerous samples.

Conclusions:

  • The proposed method offers a reliable approach for cholinesterase activity determination.
  • This modification enhances the accuracy and applicability of Bellino's assay.
  • The adaptable assay is valuable for complex biochemical and pharmacological research.