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PET imaging of Mn labeled DOTATATE and DOTAJR11.
Sci Rep
January 2025
Department of Radiology, The University of Alabama at Birmingham, Birmingham, USA.
Manganese-52 is gaining interest as an isotope for PET imaging due to its desirable decay and chemical properties for radiopharmaceutical development. Somatostatin receptor 2 (SSTR2) is significantly overexpressed by neuroendocrine tumors (NETs) and is an important target for nuclear imaging and therapy. As an agonist, [Ga]Ga-DOTATATE has demonstrated significant internalization upon interaction with receptor ligands, whereas [Ga]Ga-DOTA-JR11(as an antagonist) exhibits limited internalization but better pharmacokinetics and increased tumor uptake.
View Article and Find Full Text PDFAdvances in Preclinical Research of Theranostic Radiopharmaceuticals in Nuclear Medicine.
ACS Appl Mater Interfaces
January 2025
State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China.
Theranostics of nuclear medicine refers to the combination of radionuclide imaging and internal irradiation therapy, which is currently a research hotspot and an important direction for the future development of nuclear medicine. Radiopharmaceutical is a vital component of nuclear medicine and serves as one of the fundamental pillars of molecular imaging and precision medicine. At present, a variety of radiopharmaceuticals have been developed for various targets such as fibroblast activation protein (FAP), prostate-specific membrane antigen (PSMA), somatostatin receptor 2 (SSTR2), C-X-C motif chemokine receptor 4 (CXCR4), human epidermal growth factor-2 (HER2), and integrin αvβ, and some of them have been successfully applied in clinical practice.
View Article and Find Full Text PDFThe central nervous system (CNS) tumor with embryonal tumors type is a rare type of CNS tumor with lack of unifying genetic alterations or diagnostic markers. The CNS tumor-embryonal tumors (CETs) have limited therapeutic options with high probability of adverse events associated with conventional treatment. Identification of somatostatin receptor expression and/or prostate-specific membrane antigen expression in CET patients by using PET/CT imaging may be helpful for deciding therapeutic approaches in these patients as theranostics.
View Article and Find Full Text PDFPreclinical Study of a Dual-Target Molecular Probe Labeled with Ga Targeting SSTR2 and FAP.
Pharmaceuticals (Basel)
December 2024
Department of Nuclear Medicine, First Medical Center, Chinese PLA General Hospital, Fuxing Road 28, Beijing 100853, China.
Objective: Currently, Ga-labeled somatostatin analogs (SSAs) are the most commonly used imaging agents for patients with neuroendocrine tumors (NETs) in clinical practice, demonstrating good results in tumor diagnosis. For applications in peptide receptor radionuclide therapy (PRRT), targeted drugs should have high tumor uptake and prolonged tumor retention time. To enhance the uptake and retention of tracers in NETs, our goal is to design a Ga-labeled heterodimer for optimizing pharmacokinetics and assess whether this form is more efficacious than its monomeric equivalents.
View Article and Find Full Text PDFPheochromocytoma: an updated scoping review from clinical presentation to management and treatment.
Front Endocrinol (Lausanne)
December 2024
One Health Research Group, Universidad de las Americas, Quito, Ecuador.
Pheochromocytomas and paragangliomas (PPGLs) are rare neuroendocrine tumors derived from chromaffin cells, with 80-85% originating in the adrenal medulla and 15-20% from extra-adrenal chromaffin tissues (paragangliomas). Approximately 30-40% of PPGLs have a hereditary component, making them one of the most genetically predisposed tumor types. Recent advances in genetic research have classified PPGLs into three molecular clusters: pseudohypoxia-related, kinase-signaling, and -signaling pathway variants.
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