In a previous study, amphiphilic copolymer, polypeptide K237 (HTMYYHHYQHHL) and folic acid (FA) modified poly(ethylene glycol)-poly(lactic-co-glycolic acid) (K237/FA-PEG-PLGA) nanoparticles were developed and studied as a drug carrier. To further promote the clinical application of K237/FA-PEG-PLGA nanoparticles and provide guidance for future research, we need to examine their specific biodist...

Various types of zinc (Zn) complexes have been developed as promising antidiabetic agents in recent years. However, the pharmacological action of Zn complex is not elucidated because the biodistribution of the complex in a living organism has not been studied. Nuclear medicine imaging is superior technology for the noninvasive analysis of the temporal distribution of drug candidates in living o...

The process of opsonization is one of the most important biological barriers to controlled drug delivery. Injectable polymeric nanoparticle carriers have the ability to revolutionize disease treatment via spatially and temporally controlled drug delivery. However, opsonin proteins present in the blood serum quickly bind to conventional non-stealth nanoparticles, allowing macrophages of the mono...

The biodistribution of [1-(14)C]ethanol in rodents was examined to determine sites of concentration of ethanol or its metabolites that may contribute to its toxicological and pharmacokinetic characteristics. After i.v. administration of [1-(14)C]ethanol in mice, radioactivity showed a widespread distribution among body organs. Determination of the proportion of tissue radioactivity accounted fo...

BACKGROUND To evaluate the biodistribution of therapeutic (131)I-metaiodobenzylguanidine (MIBG) and assess the sensitivity of diagnostic versus therapeutic (131)I-MIBG scans to detect metastatic disease. PROCEDURE This retrospective study included 44 diagnostic and post-therapy scans (PTS) in 18 children with neuroblastoma treated with (131)I-MIBG (2.0-33.1 GBq). The findings of diagnostic sc...

The size of affibody molecules makes them suitable as targeting agents for targeted radiotherapy with the alpha-emitter 211At, since their biokinetic properties match the short physical half-live of 211At. In this study, the potential for this approach was investigated in vivo. Two different HER-2 binding affibody molecules were radiolabeled with 211At using both the linker PAB (N-succinimidyl-...

UNLABELLED This study evaluates the quantitative biodistribution of commercially available CdSe quantum dots (QD) in mice. METHODS (64)Cu-Labeled 800- or 525-nm emission wavelength QD (21- or 12-nm diameter), with or without 2,000 MW (molecular weight) polyethylene glycol (PEG), were injected intravenously into mice (5.55 MBq/25 pmol QD) and studied using well counting or by serial microPET a...

Mesothelin is a tumor differentiation antigen expressed by epithelial tumors, including pancreatic cancer. Currently, mesothelin is being targeted with an antibody-drug conjugate (ADC) consisting of a mesothelin-specific antibody coupled to a highly potent chemotherapeutic drug. Considering the toxicity of the ADC and reduced accessibility of pancreatic tumors, non-invasive imaging could provid...

UNLABELLED Cyclooxygenase-2 (COX-2) overexpression has been observed in various pathologies, such as inflammation, cancer, ischemia, and Alzheimer's disease. As an initial step toward a noninvasive PET technique to assay COX-2 expression, this study describes the synthesis and preliminary evaluation of the radiolabeled COX-2 inhibitor (18)F-desbromo-DuP-697. METHODS Desbromo-DuP-697 was radio...

Introduction: Various bone palliative therapeutic agents have been developed and widely used for bone metastasis such as Sm-EDTMP. In this study, production, quality control and biodistribution studies of a newly developed therapeutic compound have been presented followed by imaging studies in wild-type rodents. Methods: Sm-TTHMP was prepared starting from Sm-SmCl3, prepared by neutron activati...