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Related Experiment Videos

Development of a solid phase RIA for human plasma somatostatin.

A Brocchi1, M Tommasi

  • 1Dipartimento di Fisiopatologia Clinica, Unità di Medicina Nucleare, Firenze, Italy.

International Journal of Radiation Applications and Instrumentation. Part B, Nuclear Medicine and Biology
|January 1, 1988
PubMed
Summary

A new radioimmunoassay method for somatostatin was validated using solid-phase immunoextraction. This method demonstrates high sensitivity and precision for measuring somatostatin in human plasma.

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Area of Science:

  • Endocrinology
  • Biochemistry
  • Assay Development

Background:

  • Somatostatin is a peptide hormone with widespread tissue distribution and diverse physiological roles.
  • Accurate measurement of somatostatin levels is crucial for understanding various biological processes and disease states.

Purpose of the Study:

  • To validate a novel radioimmunoassay (RIA) method for quantifying somatostatin in biological fluids.
  • To assess the sensitivity, precision, accuracy, and correlation of the new RIA method with existing techniques.

Main Methods:

  • Solid-phase immunoextraction coupled with radioimmunoassay was employed.
  • Assay validation included sensitivity, within-assay and between-assay precision, dilution tests, and recovery tests.
  • Correlation with a current extraction method was evaluated.

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Main Results:

  • The new RIA method exhibited a sensitivity of 1.8 pg/mL.
  • High precision was observed with within-assay coefficients of variation (CV) of 12.2% and 11.9%, and between-assay CV of 14.2%.
  • Excellent accuracy was confirmed by dilution (r=0.997) and recovery (r=0.999) tests, with good correlation (r=0.862) to a current method.

Conclusions:

  • The developed solid-phase immunoextraction RIA is a valid and reliable method for somatostatin measurement.
  • This assay provides sensitive, precise, and accurate quantification of somatostatin in human plasma.
  • The basal plasma somatostatin level in normal subjects was determined to be 11.5 +/- 5.80 pg/mL.