Evaluation of Acetylcholinesterase Stability in Fresh and Frozen Blood Samples
DOI:
https://doi.org/10.18316/sdh.v9i3.7711Keywords:
Acetylcholinesterase, Stability, Pesticides, Fresh Samples, Frozen Samples, Occupational ExposureAbstract
Objective: to evaluate the stability of acetylcholinesterase (AChE) enzymatic activity in fresh and frozen blood samples.
Materials and Methods: the sample consisted of a pool of volunteers in which AChE activity was determined. Activity was determined in the sample without contamination by the 0.07M Diazinon pesticide (P0/control) and at three levels of compound inhibition: P1 (7x10-3M), P2 (5.7x10-3M) and P3 (4x10-3M). The stability of fresh samples on the day of collection, as well as 24 and 72 hours after collection was evaluated. Frozen samples were evaluated after 3, 6 and 8 days of freezing.
Results: in fresh samples the control stability was 24 hours and the pesticide contaminated samples showed lower stability and greater inhibition of AChE over time. The frozen samples showed good stability for 8 days. There was no significant difference between AChE activity in fresh and frozen samples on day 3, but fresh samples were not stable.
Conclusion: and the processing of the fresh samples can be carried out until the 3rd day and the frozen samples, although requiring further testing including 24 and 48 hours freezing, can be used for up to 8 days.
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