In this issue of The Journal of Nuclear Medicine, Wild et al. report the binding and animal biodistribution data of [Lys(Ahx-DTPA-In)NH2]exendin-4 (Ahx is aminohexanoic acid; DTPA is diethylenetriaminepentaacetic acid), an analog of glucagonlike peptide-1 (GLP-1) (1). Their results raise high hopes of actually achieving selective and potent receptormediated targeting of tumors with a radiolabel...

We have investigated the physicochemical and paramagnetic properties of the new gadolinium complexes of N-(pyrid-2-yl-methyl)-ethylenediamine-N,N,N-triacetic acid (Gd-PEDTA) and N-tris(2-aminoethyl)amine-N,N,N,N,N,N+hexaacetic acid(Gd-TTAHA). The relaxivities as well as the thermodynamic and conditional stability constants of these complexes with respect to the physiological relevance were dete...

Contrast-enhancing magnetic resonance imaging with the liver-specific agent gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA) has been shown to improve the detection rate of focal lesions. There is evidence from preclinical studies that multidrug organic anion transporters are involved in hepatic uptake of Gd-EOB-DTPA. Therefore, we evaluated affinity of the contrast age...

New measures are needed to rapidly assess emerging treatments for cystic fibrosis (CF) lung disease. Using an imaging approach, we evaluated the absorptive clearance of the radiolabeled small molecule probe diethylene triamine penta-acetic acid (DTPA) as an in vivo indicator of changes in airway liquid absorption. DTPA absorption and mucociliary clearance rates were measured in 21 patients with...

Background: In single photon emission computed tomography [SPECT], high specific activity of In-labelled tracers will allow administration of low amounts of tracer to prevent receptor saturation and/or side effects. To increase the specific activity, we studied the effect of the buffer used during the labelling procedure: NaAc, NH4Ac, HEPES and MES buffer. The effect of the ageing of the InCl3 ...

By H. S. WINCHELL, MYRON POLLYCOVE, W. D. LOUGHMAN AND J. H. LAWRENCE R ELATIVELY selective beta irradiation of the lymphatic system in the dog has been achieved with internally administered Yttrium90 chelated with diethylene triamine penta-acetic acid ( Y90-DTPA) . Intravenous injection of Y#{176}#{176}-DTPA followed by continuous intravenous infusion of the animal’s own urine containing the e...

Accurate diagnosis in early stage is vital for the treatment of Hepatocellular carcinoma. The aim of this study was to investigate the potential of poly lactic acid-polyethylene glycol/gadolinium-diethylenetriamine-pentaacetic acid (PLA-PEG/Gd-DTPA) nanocomplexes using as biocompatible molecular magnetic resonance imaging (MRI) contrast agent. The PLA-PEG/Gd-DTPA nanocomplexes were obtained usi...

The protonation constants of DTPA (diethylenetriaminepentaacetic acid) and two derivatives of DTPA, 1-R(4,4diphenyl cyclohexyl-phosphonyl-methyl diethylenentriaminepentaacetic acid (MS-325) and (R)-hydroxymethyl-diethylenentriaminepentaacetic acid (HMDTPA) were determined by potentiometric titration in 0.1 M NaClO4. The formation of 1 : 1 complexes of Am3+, Cm3+ and Ln3+ cations with these thre...

By H. S. WINCHELL, MYRON POLLYCOVE, W. D. LOUGHMAN AND J. H. LAWRENCE R ELATIVELY selective beta irradiation of the lymphatic system in the dog has been achieved with internally administered Yttrium90 chelated with diethylene triamine penta-acetic acid ( Y90-DTPA) . Intravenous injection of Y#{176}#{176}-DTPA followed by continuous intravenous infusion of the animal’s own urine containing the e...

The leading causes of morbidity and mortality globally are cardiovascular diseases, and nanomedicine can provide many improvements including disease-specific targeting, early detection, and local delivery of diagnostic agents. To this end, we designed fibrin-binding, peptide amphiphile micelles (PAMs), achieved by incorporating the targeting peptide cysteine-arginine-glutamic acid-lysine-alanin...