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Related Experiment Video

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Basophil Activation Test for Investigation of IgE-Mediated Mechanisms in Drug Hypersensitivity
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High-sensitivity radioimmunoassay for substance P.

R O'Connell1, P Skrabanek1, D Cannon1

  • 1Endocrine Unit, Mater Misericordiae Hospital, Dublin 7.

Irish Journal of Medical Science
|August 13, 2016
PubMed
Summary

This study optimized a non-equilibrium radioimmunoassay for substance P, achieving high sensitivity and specificity for biological samples. The assay is rapid, precise, and suitable for clinical use.

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Area of Science:

  • Biochemistry
  • Immunology
  • Analytical Chemistry

Background:

  • Substance P is a neuropeptide involved in various physiological processes.
  • Accurate quantification of Substance P in biological samples is crucial for research and diagnostics.
  • Existing assays may lack the required sensitivity, specificity, or practicality.

Purpose of the Study:

  • To optimize a non-equilibrium radioimmunoassay for Substance P.
  • To establish an assay with high sensitivity and specificity for biological matrices.
  • To develop a practical and efficient method for Substance P determination.

Main Methods:

  • Development and optimization of a non-equilibrium radioimmunoassay protocol.
  • Validation of assay sensitivity using known Substance P concentrations.
  • Assessment of antiserum specificity against related peptides like physalaemin and eledoisin.

Main Results:

  • The optimized assay demonstrated a sensitivity of 2 pg (1.5 fmole).
  • High specificity was confirmed, with minimal cross-reactivity to physalaemin (0.1%) and eledoisin (1%).
  • The assay is easy to perform, precise (5% coefficient of variation), and completes within 24 hours.

Conclusions:

  • The developed non-equilibrium radioimmunoassay is highly sensitive and specific for Substance P.
  • This assay is suitable for quantifying Substance P in human plasma and other biological materials.
  • The assay's practicality and speed make it valuable for research and potentially clinical applications.