PET-CT Imaging of Polymeric Nanoparticle Tumor Accumulation in Patients.
prospective_cohort · Level II
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- Record sourced from PubMed, PMID 35427430.
- Also identified by DOI 10.1002/adma.202201043.
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Abstract
Several FDA/EMA-approved nanomedicines have demonstrated improved pharmacokinetics and toxicity profiles compared to their conventional chemotherapeutic counterparts. The next step to increase therapeutic efficacy depends on tumor accumulation, which can be highly heterogeneous. A clinical tool for patient stratification is urgently awaited. Therefore, a docetaxel-entrapping polymeric nanoparticle (<sup>89</sup> Zr-CPC634) is radiolabeled, and positron emission tomography/computed tomography (PET/CT) imaging is performed in seven patients with solid tumors with two different doses of CPC634: an on-treatment (containing 60 mg m<sup>-2</sup> docetaxel) and a diagnostic (1-2 mg docetaxel) dose (NCT03712423). Pharmacokinetic half-life for <sup>89</sup> Zr-CPC634 is mean 97.0 ± 14.4 h on-treatment, and 62.4 ± 12.9 h for the diagnostic dose (p = 0.003). At these doses accumulation is observed in 46% and 41% of tumor lesions with a median accumulation in positive lesions 96 h post-injection of 4.94 and 4.45%IA kg<sup>-1</sup> (p = 0.91), respectively. In conclusion, PET/CT imaging with a diagnostic dose of <sup>89</sup> Zr-CPC634 accurately reflects on-treatment tumor accumulation and thus opens the possibility for patient stratification in cancer nanomedicine with polymeric nanoparticles.
Medical subject headings
- Nanoparticles
- Neoplasms