Tc-99m-glucoheptonate-guanine: Synthesis, biodistribution and imaging in animals
Küçük Resim Yok
Tarih
2008
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The aim of the current study was to design a nucleotide-based radiopharmaceutical which could be labeled with Tc-99m and to investigate its radiopharmaceutical efficiency and stability. GHA (glucoheptonate) was used as bifunctional chelate. GHA was labeled with Tc-99m by SnCl2 reduction method first, and then G (guanine) was conjugated with Tc-99m-GHA at 90 C. In order to determine its radiopharmaceutical stability, thin layer radio chromatography (TLRC) and electrophoresis were employed. In addition, the results were confirmed using high performance liquid radio chromatography (HPLRC). Scintigraphic imaging was performed on rats with mammary tumors, while tissue distribution was determined on Albino Wistar rats. Labeling yield was found to be over 95% and the labeled complex maintained its stability during the study period. The lipophilicity of the Tc-99m-GHG was measured and the partition coefficient (logP) of the labeled compound calculated. The results demonstrated that the uptake of Tc-99m-GHG (Tc-99m-glucoheptonate-guanine) reached its maximum at 3 hours p.i. in stomach and intestines. Main way of excretion was renal. Hepatobiliary excretion was also observed. In conclusion, Tc-99m-GHG may be useful as a nucleotide-based radiopharmaceutical for in vivo applications.
Açıklama
Anahtar Kelimeler
Kaynak
Journal of Radioanalytical and Nuclear Chemistry
WoS Q Değeri
Q3
Scopus Q Değeri
Cilt
275
Sayı
2
