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Maruk AY, Ragulin VV, Mitrofanov IA, Tsebrikova GS, Solov’ev VP, Lunev AS, Lunyova KA, Klementyeva OE, Baulin VE, Kodina GE, Tsivadse AY. Synthesis, Complexation Properties, and Evaluation of New Aminodiphosphonic Acids as Vector Molecules for 68Ga Radiopharmaceuticals. Molecules 2021; 26:molecules26082357. [PMID: 33919605 PMCID: PMC8073962 DOI: 10.3390/molecules26082357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/08/2021] [Accepted: 04/16/2021] [Indexed: 12/05/2022] Open
Abstract
Two new aminodiphosphonic acids derived from salicylic acid and its phosphonic analogue were prepared through a simple and efficient synthesis. 2-[(2-Amino-2,2-diphosphono)ethyloxy]-benzoic acid 8 and 2-[(2-amino-2,2-diphosphono)ethyloxy]-5-ethyl-phenylphosphonic acid 9 were evaluated for their applicability as 68Ga binding bone-seeking agents. Protonation constants of 8 and 9 and stability constants of the Ga3+ complexes with 8 and 9 in water were determined. The stability constant of Ga3+ complex with fully phosphorylated acid 9 (logKGaL = 31.92 ± 0.32) significantly exceeds stability constant of Ga3+ complex with 8 (logKGaL = 26.63 ± 0.24). Ligands 8 and 9 are as effective for Ga3+ cation binding as ethylenediamine-N,N’-diacetic-N,N’-bis(methy1enephosphonic) acid and ethylenediamine-N,N,N’,N’-tetrakis(methylenephosphonic) acid, respectively. The labelling process and stability of [68Ga]Ga-8 and [68Ga]Ga-9 were studied. Both 8 and 9 readily form 68Ga-complexes stable to ten-fold dilution with saline. However, in fetal bovine serum, only [68Ga]Ga-9 was stable enough to be subject to biological evaluation. It was injected into rats with bone pathology and aseptic inflammation of soft tissues. For [68Ga]Ga-9 in animals with a bone pathology model in 60 and 120 min after injection, a slight accumulation in the pathology site, stable blood percentage level, and moderate accumulation in the liver were observed. For animals with an aseptic inflammation, the accumulation of [68Ga]Ga-9 in the pathology site was higher than that in animals with bone pathology. Moreover, the accumulation of [68Ga]Ga-9 in inflammation sites was more stable than that for [68Ga]Ga-citrate. The percentage of [68Ga]Ga-9 in the blood decreased from 3.1% ID/g (60 min) to 1.5% ID/g (120 min). Accumulation in the liver was comparable to that obtained for [68Ga]Ga-citrate.
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Affiliation(s)
- Alesya Ya. Maruk
- Department of Radiation Medical Technologies, State Research Center—Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Zhivopisnaya str. 46, 123182 Moscow, Russia; (A.Y.M.); (I.A.M.); (A.S.L.); (K.A.L.); (O.E.K.); (G.E.K.)
| | - Valery V. Ragulin
- Laboratory of Organophosphorus Сompounds, Institute of Physiologically Active Compounds, Russian Academy of Sciences, Severnyi proezd 1, 142432 Chernogolovka, Russia; (V.V.R.); (V.E.B.)
| | - Iurii A. Mitrofanov
- Department of Radiation Medical Technologies, State Research Center—Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Zhivopisnaya str. 46, 123182 Moscow, Russia; (A.Y.M.); (I.A.M.); (A.S.L.); (K.A.L.); (O.E.K.); (G.E.K.)
| | - Galina S. Tsebrikova
- Laborotary of Novel Physicochemical Problems, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31/4, 119071 Moscow, Russia; (V.P.S.); (A.Y.T.)
- Correspondence:
| | - Vitaly P. Solov’ev
- Laborotary of Novel Physicochemical Problems, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31/4, 119071 Moscow, Russia; (V.P.S.); (A.Y.T.)
| | - Alexandr S. Lunev
- Department of Radiation Medical Technologies, State Research Center—Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Zhivopisnaya str. 46, 123182 Moscow, Russia; (A.Y.M.); (I.A.M.); (A.S.L.); (K.A.L.); (O.E.K.); (G.E.K.)
| | - Kristina A. Lunyova
- Department of Radiation Medical Technologies, State Research Center—Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Zhivopisnaya str. 46, 123182 Moscow, Russia; (A.Y.M.); (I.A.M.); (A.S.L.); (K.A.L.); (O.E.K.); (G.E.K.)
| | - Olga E. Klementyeva
- Department of Radiation Medical Technologies, State Research Center—Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Zhivopisnaya str. 46, 123182 Moscow, Russia; (A.Y.M.); (I.A.M.); (A.S.L.); (K.A.L.); (O.E.K.); (G.E.K.)
| | - Vladimir E. Baulin
- Laboratory of Organophosphorus Сompounds, Institute of Physiologically Active Compounds, Russian Academy of Sciences, Severnyi proezd 1, 142432 Chernogolovka, Russia; (V.V.R.); (V.E.B.)
| | - Galina E. Kodina
- Department of Radiation Medical Technologies, State Research Center—Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Zhivopisnaya str. 46, 123182 Moscow, Russia; (A.Y.M.); (I.A.M.); (A.S.L.); (K.A.L.); (O.E.K.); (G.E.K.)
| | - Aslan Yu. Tsivadse
- Laborotary of Novel Physicochemical Problems, Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31/4, 119071 Moscow, Russia; (V.P.S.); (A.Y.T.)
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