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Platelet serotonin uptake: methods and strain differences.

E E Codd1, R F Walker

  • 1Dept. of Reproductive and Developmental Toxicology, Smith Kline and French Laboratories, King of Prussia, PA 19406-0939.

Psychiatry Research
|September 1, 1987
PubMed
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Platelet serotonin uptake assays are influenced by assay conditions. Optimizing factors like anticoagulant and wash rates improves reliability, while genetic factors increase variability in serotonin transporter studies.

Area of Science:

  • Biochemistry
  • Neuroscience
  • Pharmacology

Background:

  • Platelets serve as a model for serotoninergic neurons due to their pharmacokinetic properties.
  • Challenges exist in standardizing platelet serotonin (5HT) uptake assays.

Purpose of the Study:

  • To investigate the impact of various assay factors on platelet 5HT uptake parameters.
  • To identify methods to improve the reliability and reduce variability in platelet 5HT uptake studies.

Main Methods:

  • Assessing the effect of citrate-dextrose anticoagulant on platelet 5HT uptake at room temperature.
  • Evaluating the influence of filtration wash rates on apparent uptake affinities.
  • Comparing Vmax variability in platelets from inbred versus outbred rat strains.

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Main Results:

  • Citrate-dextrose anticoagulant stabilized platelet 5HT uptake.
  • Increased wash rates during filtration led to higher apparent uptake affinities.
  • Inbred rat strains showed less Vmax variability compared to outbred strains.

Conclusions:

  • Assay conditions significantly affect platelet 5HT uptake measurements.
  • Genetic diversification correlates with increased variability in platelet 5HT uptake.
  • Standardization of assay parameters is crucial for accurate serotonin transporter research.