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68Ga-Labeling of RGD peptides and biodistribution
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- Blom, Elisabeth (author)
- Uppsala universitet,Institutionen för biokemi och organisk kemi
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- Velikyan, Irina (author)
- Uppsala universitet,Enheten för radiologi
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- Estrada, Sergio (author)
- Uppsala universitet,Plattformen för preklinisk PET
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- Muhammad, Taj (author)
- Ding, Chenmin (author)
- Nair, Manoj (author)
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- (creator_code:org_t)
- 2012
- 2012
- English.
- In: International Journal of Clinical and Experimental Medicine. - 1940-5901. ; 5:2, s. 165-172
- Journal article (peer-reviewed)
Abstract
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- Several peptides comprising Arg-Gly-Asp (RGD) domain and macrocyclic chelator were labeled with 68Ga for the imaging of angiogenesis. The analogues varied in peptide constitution, linker and chelator type. The labeling efficiency did not vary with the peptide constitution and linker type, but depended on the chelator type. Four of the compounds containing 2,2',2'',2'''-(1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrayl)tetraacetic acid (DOTA) chelator were labeled at 90 ± 5°C using conventional or microwave heating reaching 90% of 68Ga incorporation after 5 and 2 min respectively, when the concentration of the precursor was 2.5 μM. The compound having 2,2',2''-(1,4,7-triazonane-1,4,7-triyl)triacetic acid (NOTA) as the chelator could be labeled at room temperature within 5 min using 2.5 μM peptide precursor. Two of the compounds contained a poly (ethylene glycol) (PEG) linker to the chelator. The biodistribution of the analogues was studied in male rats.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine (hsv//eng)
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- art (subject category)
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- Blom, Elisabeth
- Velikyan, Irina
- Estrada, Sergio
- Hall, Håkan
- Muhammad, Taj
- Ding, Chenmin
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- Nair, Manoj
- Långström, Bengt
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