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Updated: Dec 7, 2025
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Published on: August 31, 2022
A Comparative Study of the Pharmacokinetics of Bis- and Pentaphosphonic Acids Labeled with Gallium-68 in Rats with
V K Tishchenko1,2, V M Petriev3,4, K A Kuzenkova3
1National Medical Research Center of Radiology, Ministry of Health of the Russian Federation, Obninsk, Russia. vikshir82@mail.ru.
Abstract:
We analyzed biodistribution of 68Ga-labeled hydroxyethylidenediphosphonic acid (68Ga-HEDP) and diethylenetriaminepentakis(methylenephosphonic acid) (68Ga-DTPMP) in Wistar rats with experimental model of bone callus. It was shown that the content of 68Ga-DTPMP and 68Ga-HEDP in bone callus was ~1.5-fold higher than in intact femur. 68Ga-DTPMP was characterized by higher stability in vivo, higher uptake in the bone tissue, and lower uptake in others visceral organs in comparison with 68Ga-HEDP. Thus, 68Ga-DTPMP had more suitable pharmacokinetic properties than 68Ga-HEDP.
