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[Antibody radiolabeling with technetium-99m]

A Perera1, C Pérez

  • 1Centro de Investigaciones Clínicas, Kohly. Playa, Ciudad de La Habana, 11300, Cuba. cic@cic.sld.cu

Revista Espanola De Medicina Nuclear
|August 29, 1998
PubMed
Summary

This review updates methods for labeling antibodies with Technetium-99m (99mTc) for radioimmunodiagnosis. It discusses direct and indirect labeling approaches, highlighting their pros and cons for clinical applications.

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Area of Science:

  • Nuclear medicine
  • Radiopharmaceutical chemistry
  • Immunology

Context:

  • Labeled polyclonal and monoclonal antibodies are crucial for immunoscintigraphic diagnosis.
  • Technetium-99m (99mTc) is a preferred radioisotope for radioimmunodiagnosis due to cost, availability, and imaging characteristics.
  • Despite its short half-life (6.01 h), 99mTc remains widely used.

Purpose:

  • To provide an updated overview of available procedures for 99mTc-labeling of antibodies and antibody fragments.
  • To compare direct and indirect labeling methods.
  • To discuss the advantages and disadvantages of each labeling strategy.

Summary:

  • Antibody labeling methods are categorized into direct and indirect approaches.
  • Direct methods involve reducing disulfide bridges to create sulfhydryl groups for 99mTc chelation.
  • Indirect methods attach exogenous chelators to antibodies for 99mTc binding.

Impact:

  • Understanding these labeling techniques is essential for selecting the optimal method for specific diagnostic situations.
  • This review aids researchers and clinicians in choosing appropriate radiolabeling strategies for antibody-based diagnostics.
  • The choice of method depends on the specific clinical application and desired outcomes.

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