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Evaluation of a PSMA-targeted BNF nanoparticle construct.

Babak Behnam Azad1, Sangeeta R Banerjee, Mrudula Pullambhatla

  • 1Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD, USA. mpomper@jhmi.edu.

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Summary

Researchers developed a novel bionized nanoferrite (BNF) nanoparticle for prostate cancer (PCa) imaging. This targeted nanoparticle preferentially accumulates in PSMA-positive tumors, showing promise for early PCa detection.

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Oncology

Background:

  • Early prostate cancer (PCa) detection improves patient prognosis.
  • Prostate-specific membrane antigen (PSMA) is a key target for PCa imaging and therapy due to its expression on PCa cells and internalization upon ligand binding.

Purpose of the Study:

  • To synthesize and biologically evaluate a PSMA-targeted bionized nanoferrite (BNF) nanoparticle for PCa imaging.
  • To assess the nanoparticle's properties for targeted imaging, including circulation time and clearance.
  • To confirm tumor specificity and uptake in PSMA-positive tumors.

Main Methods:

  • Synthesis of PSMA-targeted bionized nanoferrite (BNF) nanoparticles.
  • In vivo optical imaging to assess nanoparticle accumulation in PSMA+ tumors.
  • Single photon emission computed tomography (SPECT) imaging and biodistribution studies.
  • Ex vivo analyses including fluorescence microscopy, Prussian blue staining, and immunohistochemistry.

Main Results:

  • Targeted BNF nanoparticles showed preferential accumulation in PSMA+ tumors 4 hours post-injection.
  • Non-targeted nanoparticles exhibited lower uptake and similar accumulation in both PSMA+ and PSMA- tumors.
  • SPECT imaging and biodistribution studies revealed highest tumor accumulation at 48 hours post-injection (4.3 ± 0.4 %ID g⁻¹).
  • High tumor-to-blood (7.5 ± 2.4) and tumor-to-muscle (11.6 ± 1.2) ratios were observed.
  • Ex vivo studies confirmed enhanced nanoparticle uptake in PSMA+ tumors.

Conclusions:

  • The synthesized PSMA-targeted BNF nano-formulation demonstrates properties suitable for targeted in vivo imaging.
  • Preferential accumulation in PSMA+ tumors suggests high target specificity.
  • This nanoparticle formulation holds promise for advancing PSMA-targeted imaging applications in prostate cancer diagnosis.