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Area of Science:

  • Nuclear medicine
  • Oncology
  • Radiopharmacology

Background:

  • Peptide receptor radionuclide therapy (PRRT) using Y-90 or Lu-177 is effective for cancers like neuroendocrine tumors and prostate cancer.
  • Renal and hematopoietic toxicities are significant limitations, with kidneys being the critical organ due to tracer uptake and retention.
  • Nephrotoxicity in PRRT ranges from 0-14% and is influenced by patient-specific factors and treatment parameters.

Purpose of the Study:

  • To review the mechanisms of nephrotoxicity in PRRT.
  • To identify risk factors for renal toxicity.
  • To discuss methods for assessing and mitigating renal toxicity during PRRT.

Main Methods:

  • Literature review of PRRT, nephrotoxicity, and renal function assessment.
  • Analysis of risk factors, including patient-related and treatment-related issues.
  • Evaluation of protective strategies like amino acid coinfusion, dose fractionation, and dosimetry.

Main Results:

  • Kidney damage in PRRT stems from glomerular filtration, tubular reabsorption, and interstitial retention of radiolabeled tracers.
  • Patient factors (age, pre-existing conditions) and treatment factors (radionuclide, dose, cycles) influence renal toxicity.
  • Accurate renal function monitoring (beyond serum creatinine) and patient-specific dosimetry are vital for safe PRRT.

Conclusions:

  • Minimizing renal absorbed dose through patient-specific dosimetry is key to safe PRRT.
  • Close monitoring of renal function using precise methods is essential for early detection and management of toxicity.
  • Strategies like amino acid coinfusion and dose fractionation can help reduce nephrotoxicity.