Safety, Biodistribution, and Radiation Dosimetry of the Ga-Labeled Minigastrin Analog DOTA-MGS5 in Patients with Advanced Medullary Thyroid Cancer and Other Neuroendocrine Tumors.

Several exploratory studies have demonstrated the feasibility of cholecystokinin-2 receptor (CCK2R) targeting in patients with medullary thyroid carcinoma (MTC) and other neuroendocrine tumors (NETs). We report the results of a prospective phase I/IIA pilot study (clinicaltrials.gov NCT06155994) conducted at our center with the Ga-labeled peptide analog DOTA-DGlu-Ala-Tyr-Gly-Trp-(N-Me)Nle-Asp-1-Nal-Phe-NH (Ga-DOTA-MGS5).

Efficacy and safety of rechallenge with [Lu]Lu-PSMA-I&T radioligand therapy in metastatic castration resistant prostate cancer.

Background: The purpose of this study was to evaluate the safety and outcome of rechallenge [Lu]Lu-PSMA-I&T in newly progressed mCRPC patients after response to initial [Lu]Lu-PSMA radioligand therapy (PRLT).

Methods: We retrospectively included 18 patients who underwent rechallenge with [Lu]Lu-PSMA-I&T. All patients presented with (i) newly progressed disease after response to initial PRLT; (ii) a [Ga]Ga-PSMA-11 PET/CT confirming the presence of PSMA-positive metastases; iii) ECOG performance status 0-1.

Preliminary Clinical Experience with Cholecystokinin-2 Receptor PET/CT Using the Ga-Labeled Minigastrin Analog DOTA-MGS5 in Patients with Medullary Thyroid Cancer.

PET/CT with the new Ga-labeled minigastrin analog DOTA-dGlu-Ala-Tyr-Gly-Trp-(-Me)Nle-Asp-1-Nal-NH (Ga-DOTA-MGS5) was performed on patients with advanced medullary thyroid cancer (MTC) to evaluate cholecystokinin-2 receptor expression status. Six patients with advanced MTC underwent PET/CT with Ga-DOTA-MGS5. From the images acquired 1 and 2 h after injection, preliminary data on the biodistribution and tumor-targeting properties were evaluated in a retrospective analysis.

Nephrotoxicity and hematotoxicity one year after four cycles of peptide receptor radionuclide therapy (PRRT) and its impact on future treatment planning - A retrospective analysis.

Purpose: Nephro- and hematotoxicity after peptide receptor radionuclide therapy (PRRT) have been described in multiple studies with heterogeneous cumulative activities, number of cycles or radiolabelled peptides. Though highly differentiated metastasized neuroendocrine tumours (NET) have long progression free survival, they may progress. We analysed long-term side effects in a homogenous treatment schedule in PRRT-patients and their impact on future oncologic treatment in case of progression.

Nephrotoxicity and hematotoxicity one year after four cycles of peptide receptor radionuclide therapy (PRRT) and its impact on future treatment planning. A retrospective analysis.

Introduction: Nephro- and hematotoxicity after peptide receptor radionuclide therapy (PRRT) have been described in multiple studies with heterogeneous cumulative activities, number of cycles or radiolabelled peptides. Though highly differentiated metastasized neuroendocrine tumours (NET) have long progression free survival, they may progress. We analysed long-term side effects in a homogenous treatment schedule in PRRT-patients and their impact on future oncologic treatment in case of progression.

Comparison of Early Imaging and Imaging 60 min Post-Injection after Forced Diuresis with Furosemide in the Assessment of Local Recurrence in Prostate Cancer Patients with Biochemical Recurrence Referred for 68Ga-PSMA-11 PET/CT.

Background: 68Ga-PSMA-11 PET/CT is a promising method for the assessment of local recurrence (LR) in prostate cancer (PCa) patients. The aim of this study was to evaluate the diagnostic performance of early 68Ga-PSMA-11 PET imaging in comparison to 68Ga-PSMA-11 PET imaging 60 min post-injection (p.i.

Early Injection of Furosemide Increases Detection Rate of Local Recurrence in Prostate Cancer Patients with Biochemical Recurrence Referred for Ga-PSMA-11 PET/CT.

The aim of this study was twofold. First, we aimed to assess the impact of forced diuresis with early furosemide injection on the detection rate of local recurrence in prostate cancer patients with biochemical recurrence referred for Ga-labeled Glu-NH-CO-NH-Lys(Ahx)-HBED-CC (Ga-PSMA-11) PET/CT. Second, we determined whether intravenous administration of furosemide shortly after tracer injection increases renal washout of Ga-PSMA-11 before it binds to the PSMA receptor with possible influence on biodistribution and intensity of tracer uptake in organs with physiologic tracer accumulation.