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68Ga-Triacetylfusarinine C and 68Ga-Ferrioxamine E for Aspergillus Infection Imaging: Uptake Specificity in Various Microorganisms |
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| Authors: | Milos Petrik Hubertus Haas Peter Laverman Markus Schrettl Gerben M Franssen Michael Blatzer Clemens Decristoforo |
| Institution: | 1. Clinical Department of Nuclear Medicine, Innsbruck Medical University, Anichstrasse 35, 6020, Innsbruck, Austria 4. Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic 2. Division of Molecular Biology/Biocenter, Innsbruck Medical University, Innsbruck, Austria 3. Department of Nuclear Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands |
| Abstract: | Purpose68Ga-triacetylfusarinine C (68Ga-TAFC) and 68Ga-ferrioxamine E (68Ga-FOXE) showed excellent targeting properties in Aspergillus fumigatus rat infection model. Here, we report on the comparison of specificity towards different microorganisms and human lung cancer cells (H1299).ProceduresThe in vitro uptake of 68Ga-TAFC and 68Ga-FOXE was studied in various fungal, bacterial and yeast cultures as well as in H1299 cells. The in vivo imaging was studied in fungal and bacterial rat infection and inflammation models.Results68Ga-TAFC and 68Ga-FOXE showed rapid uptake in A. fumigatus cultures, significantly lower in other fungal species and almost no uptake in other microorganisms and H1299 cells, except for 68Ga-FOXE in Staphylococcus aureus. 68Ga-TAFC and 68Ga-FOXE revealed rapid uptake in the lungs of A. fumigatus-infected rats, low accumulation in sterile inflammation and no uptake in bacterial abscess.ConclusionsWe have shown that 68Ga-FOXE and 68Ga-TAFC have high uptake in A. fumigatus both in vitro and in vivo. 68Ga-TAFC showed higher specificity, while 68Ga-FOXE showed higher sensitivity. |
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