title: Synthesis of 4-Amino-1-Hydroxy-Butane-1,1-Diphosphonate (AHBDP) - Stannous Complexes for the Preparation of Ahbdp-Sn(II)-Tc and its Biodistribution in Rats.
abstract: The new potential tracer of bone imaging, AHBDP-Sn(II)-TcO.3H(2)O was synthesized by reducing the TcO(4) (-) to TcO(2) (+) in the presence of AHBDP and Sn(ll)'s reducing agent. We found that tin rapidly forms a stable complex with AHBDP, giving AHBDP-Sn(II).3H(2)O. In the excess of AHBDP-Sn(ll).3H(2)O, the AHBDP-Sn(II).3H(2)O coordinates with TcO(2) (+) to give AHBDP-Sn(II)-TcO.3H(2)O which could polymerise or oligomerise to give hydrophobic species. The overall process appears as a first-order reaction (K= 0.67 +/- 0.005s(-1)). In rats, the fixation of AHBDP-Sn(II)-(99m)TcO. 3H(2)O on bone is homogeneous and the scintigraphic images have the same quality as those of 1-hydroxymethane-1,1-diphosphonate-Technetium (HMDP-(99m)Tc). The activity in non-target organs was neglible.
authors.affiliation: Université Paris-Nord Laboratoire de Radiopharmacologie de la formation de Recherche Biophysique et Pharmacologie des Biosignaux (DRED) U.F.R. de Santé-Médecine-Biologie Humaine de Bobigny France.
authors.forename: S
authors.initials: S
authors.lastname: Mankhetkorn
authors.forename: C
authors.initials: C
authors.lastname: Blanchot
authors.forename: M
authors.initials: M
authors.lastname: Duran-Cordobes
authors.forename: D
authors.initials: D
authors.lastname: El Manouni
authors.forename: Y
authors.initials: Y
authors.lastname: Leroux
authors.forename: J L
authors.initials: JL
authors.lastname: Moretti