Authors:
H. Sadeghpour

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A. Jalilian Agriculture, Medicine and Industrial Research School (AMIRS) Nuclear Medicine Group Karaj Iran

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M. Akhlaghi Agriculture, Medicine and Industrial Research School (AMIRS) Nuclear Medicine Group Karaj Iran

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M. Kamali-dehghan Agriculture, Medicine and Industrial Research School (AMIRS) Nuclear Medicine Group Karaj Iran

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M. Mirzaii Agriculture, Medicine and Industrial Research School (AMIRS) Nuclear Medicine Group Karaj Iran

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A. Shafiee Tehran University of Medical Sciences Department of Medicinal Chemistry, Faculty of Pharmacy Tehran Iran

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Abstract  

Human recombinant erythropoietin (EPO) was successively labeled with [111In]-indium chloride after conjugation with freshly prepared cyclic DTPA-dianhydride (ccDTPA). The best results of the conjugation were obtained by the addition of 100 i.u. of an EPO pharmaceutical solution (in phosphate buffer, pH 7.5) to a glass tube pre-coated with DTPA-dianhydride (0.01 mg) at 25 °C with continuous mild stirring for 30 minutes. Radio thin layer chromatography (RTLC), instant thin layer chromatography (ITLC) and high performance liquid chromatography (HPLC) showed overall radiochemical purity of higher than 95% at optimized conditions (specific activity = 1.2–1.5 GBq/mg, labeling efficiency 80%). Preliminary in vivo studies in normal rat model was performed to determine the biodistribution of the radiotracer up to 1 hour using scarification. The high kidney uptake of the tracer was consistent with the reported EPO receptor distribution.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)