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Generating improved single-chain Fv molecules for tumor targeting.

G P Adams1, R Schier

  • 1Department of Medical Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA. gp_adams@fccc.edu

Journal of Immunological Methods
|January 29, 2000
PubMed
Summary

Single-chain variable fragment (scFv) molecules offer easy isolation but have transient interactions. Strategies like affinity maturation and valence modification are improving their use in cancer imaging and therapy.

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Area of Science:

  • Biotechnology
  • Immunology
  • Molecular Biology

Background:

  • Single-chain variable fragment (scFv) molecules are increasingly utilized due to ease of isolation from phage display libraries and conserved antigen recognition.
  • The monovalent nature of scFv molecules can lead to transient antigen interactions, limiting their efficacy, especially with moderate to low affinity binders.
  • Rapid clearance from circulation further restricts the application of scFv molecules in in vivo cancer imaging and therapy.

Purpose of the Study:

  • To review methods for enhancing the in vivo efficacy of scFv molecules.
  • To discuss strategies for improving antibody-based targeting vehicles for therapeutic and imaging applications.

Main Methods:

  • Review of recent literature on scFv molecule optimization strategies.

Related Experiment Videos

  • Analysis of methods including affinity maturation and modifications to size and valence.

    • Main Results:

    • Various strategies are being evaluated to overcome the limitations of scFv molecules.
    • Affinity maturation and modifications to size and valence show promise for improving in vivo performance.

    Conclusions:

    • Optimizing scFv molecules is crucial for advancing their use in cancer imaging and therapy.
    • Understanding the characteristics of an optimal antibody-based targeting vehicle is key for future development.