A photosensitizing fusion protein with targeting capabilities

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Published on: December 22, 2015

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Stefano Bruno1, Marilena Margiotta1, Marco Cozzolino2,3

  • 1Dipartimento di Scienze degli Alimenti e del Farmaco, Università degli Studi di Parma, Parma, Italy.

Biomolecular Concepts
|March 31, 2022
PubMed

Insights

Researchers developed a novel photosensitizer by fusing human recombinant myoglobin with vasoactive intestinal peptide. This construct targets prostate cancer cells expressing VPAC receptors, showing potential for targeted photodynamic therapies.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Photodynamic Therapy

Background:

  • Photodynamic therapy (PDT) utilizes photosensitizers to generate reactive oxygen species for antimicrobial and anticancer applications.
  • PDT effectiveness hinges on photosensitizer specificity for microbial or cancer cells.
  • Targeting specific cellular receptors enhances photosensitizer localization and efficacy.

Purpose of the Study:

  • To create and characterize a novel photosensitizing construct for targeted cancer therapy.
  • To investigate the targeting capability of a human recombinant myoglobin-VPAC receptor construct.
  • To evaluate the potential of Zn-protoporphyrin IX as a photosensitizer in this construct.

Main Methods:

  • Preparation of human recombinant myoglobin fused to vasoactive intestinal peptide (VIP).
  • Incorporation of Zn-protoporphyrin IX as the photosensitizing agent.
  • Assessment of construct binding to prostate cancer cells expressing VPAC receptors via fluorescence.

Main Results:

  • Successfully synthesized a human recombinant myoglobin-VIP fusion protein.
  • Zn-protoporphyrin IX was effectively integrated as the photosensitizer.
  • The construct demonstrated specific binding to prostate cancer cells expressing VPAC receptors.

Conclusions:

  • The developed myoglobin-VIP-Zn-protoporphyrin IX construct shows promise for targeted photodynamic therapy.
  • The construct's ability to bind VPAC-receptor-positive prostate cancer cells is confirmed.
  • This approach offers a potential strategy for enhancing the specificity of photodynamic anticancer treatments.
Keywords:
VIPVPAC receptorsVasoactive Intestinal PeptideZn-protoporphyrin IXcancertargeted photodynamic therapy

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