Christine Rangger

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A molecular target involved in the angiogenic process is the αvβ3 integrin. It has been demonstrated in preclinical as well as in clinical studies that radiolabelled RGD peptides and positron emission tomography (PET) allow noninvasive monitoring of αvβ3 expression. Here we introduce a 68Ga-labelled NOTA-conjugated RGD peptide ([68Ga]NODAGA-RGD) and compare(More)
Over the last years Gallium-68 ((68)Ga) has received tremendous attention for labeling of radiopharmaceuticals for positron emission tomography (PET). (68)Ga labeling of biomolecules is currently based on bifunctional chelators containing aminocarboxylates (mainly DOTA and NOTA). We have recently shown that cyclic peptide siderophores have very good(More)
Fusarinine C (FSC), a siderophore-based chelator coupled with the model peptide c(RGDfK) (FSC(succ-RGD)3), revealed excellent targeting properties in vivo using positron emission tomography (PET). Here, we report the details of radiolabeling conditions and specific activity as well as selectivity for (68)Ga. (68)Ga labeling of FSC(succ-RGD)3 was optimized(More)
The hepatic asialoglycoprotein receptor is responsible for degradation of desialylated glycoproteins through receptor-mediated endocytosis. It has been shown that imaging of the receptor density using [99mTc]diethylenetriamine pentaacetic acid (DTPA) galactosyl human serum albumin ([99mTc]GSA) allows non-invasive determination of functional hepatocellular(More)
Stability of radiolabelled cholecystokinin 2 (CCK2) receptor targeting peptides has been a major limitation in the use of such radiopharmaceuticals especially for targeted radionuclide therapy applications, e.g. for treatment of medullary thyroid carcinoma (MTC). The purpose of this study was to compare the in vitro stability of a series of peptides binding(More)
Within the last years (89)Zr has attracted considerable attention as long-lived radionuclide for positron emission tomography (PET) applications. So far desferrioxamine B (DFO) has been mainly used as bifunctional chelating system. Fusarinine C (FSC), having complexing properties comparable to DFO, was expected to be an alternative with potentially higher(More)
Targeting of cholecystokinin receptor expressing malignancies such as medullary thyroid carcinoma is currently limited by low in vivo stability of radioligands. To increase the stability, we have developed and preclinically evaluated two cyclic 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA)-minigastrin analogs radiolabeled with 111In and(More)
INTRODUCTION ⁶⁸Ga-labeled RGD peptides in combination with PET allow non-invasive determination of α(v)β₃ integrin expression which is highly increased during tumor-induced angiogenesis. The aim of this study was to synthesize and evaluate two RGD peptides containing alternative chelating systems, namely [⁶⁸Ga]NS₃-RGD-RGD and [⁶⁸Ga]Oxo-DO3A-RGD and to(More)
Imaging of angiogenic processes is of great interest in preclinical research as well as in clinical settings. The most commonly addressed target structure for imaging angiogenesis is the integrin α(v)β(3). Here we describe the synthesis and evaluation of [(18)F]FProp-Cys(*)-Arg-Arg-Glu-Thr-Ala-Trp-Ala-Cys(*)-OH, a radiolabelled peptide designed to(More)
Purpose: Multimeric arginine-glycine-aspartic acid (RGD) peptides have advantages for imaging integrin αvβ3 expression. Here, we compared the in vitro and in vivo behavior of three different Ga-68-labeled multimeric Fusarinine C-RGD (FSC-RGD) conjugates, whereby RGD was coupled directly, via a succinic acid or PEG linker (FSC(RGDfE)3, FSC(succ-RGD)3,(More)