The present study was designed to investigate the effects of aging on preferential sites of glucose adduct formation on type I collagen chains. Two CNBr peptides, one from each type of chain in the type I tropocollagen molecule, were investigated in detail: alpha 1(I)CB3 and alpha 2CB3-5. Together these peptides comprise approximately 25% of the total tropocollagen molecule. The CNBr peptides w...

The set of peptides that is bound by a given major histocompatibility complex class I product can be described by one or two properly spaced anchor residues, and two properly spaced peptide termini, approximately 8-10 residues apart. Using radiolabeled peptide libraries, we examined whether mutations in those "pockets" in class I Kb molecules that do not seem critically involved in the interact...

Despite the recent development of various radiolabelled RGD peptides for imaging the αvβ3 integrin receptor, relatively little attention has been focused on the ability of these radiotracers to monitor changes in tumour vascularity following treatment with anti-tumour therapies. Here we describe the favourable in vivo kinetics and tumour targeting properties of several novel radiolabeled RGD co...

The in vivo incorporation of exogenous radioactive acetate into two proteins of Sindbis virus, the capsid protein and PE2, is described. Under appropriate labeling conditions, 40-50% of the label in the capsid protein is found in an N-acetyl group which constitutes the NH2-terminal modification of this blocked protein. The incorporated radiolabeled acetate was useful in the purification and ana...

Glass surfaces were patterned with cell-adhesive regions of laminin adhesive peptides YIGSR, RGD, and IKVAV, and cell-repulsive regions of poly(ethylene glycol) (PEG). The patterns were created by sputter-coating titanium and then gold onto glass coverslips through electron microscope grids. Gold surfaces were modified with cysteine-terminated peptides to have approximately 450 fmol/ cm2 of pep...

Receptors for regulatory peptides are overexpressed in a variety of human cancers. They represent the molecular basis for in vivo imaging with radiolabeled peptide probes. Somatostatin-derived tracers, designed to image the sst2-overexpressing neuroendocrine tumors, have enjoyed almost 2 decades of successful development and extensive clinical applications. More recent developments include seco...

Abstract Background There is a need to develop new and more potent radiofluorinated peptide their hybrid conjugates for multiple-receptors targeting properties that overexpress on many cancers. Methods We have synthesized MUC1-[ 18 F] SFB MUC1-FA-[ using convenient one-step nucleophilic displacement reaction. In vitro cell binding in vivo evaluation animals were performed determine the potentia...

Background: In order to diagnose the site of thrombi, radiolabeled streptokinase can be prepared. The radiolabeled compound can be used in imaging of thrombi in many cardiovascular diseases. Materials and Methods: Streptokinase was successively labeled with [67Ga]-gallium chloride using cyclic DTPA-dianhydride. The conjugation with DTPA was optimized for concentration, time and temperature foll...

Publication in this issue of The Journal of Nuclear Medicine of the article by Cescato et al. (1) prompts some considerations on receptorguided tumor targeting with radionuclides. The term receptor-guided tumor targeting includes several techniques implying the direct and selective transportation of specific diagnostic or therapeutic radiolabeled peptides on cell-bound molecular targets, such a...

Molecular imaging for non-invasive assessment of angiogenesisis is of great interest for clinicians because of the wide-spread application of anti-angiogenic cancer therapeutics. Besides, many other interventions that involve the change of blood vessel/tumor microenvironment would also benefit from such imaging strategies. Of the imaging techniques that target angiogenesis, radiolabeled Arg-Gly...