Synthesis and labelling characteristics of 99mTc-mercaptoacetyltripeptides
✍ Scribed by G. Bormans; B. Cleynhens; P. Adriaens; M. de Roo; Prof. Dr. A. Verbruggen
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- French
- Weight
- 700 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
A number of derivatives of mercaptoacetyltriglycine in which one or more of the three glycylmoieties are replaced by other amino acids such as D‐ or L‐alanine, D‐serine, D‐2‐aminobutyric acid, D‐valine or D‐phenylglycine have been synthesized and labelled with technetium‐99m.
Labelling with technetium yielded in each a mixture of mainly two radioactive species, which probably are diastereomeric oxotechnetium (V) complexes originating from the presence of a chiral carbon atom in the ligands. The diastereomers were separated by reversed phase HPLC. Except for the serine derivative, all radiolabelled derivatives have a longer retention time than the parent compound ^99m^Tc‐MAG~3~. The relative amount of the two diastereomers formed upon labelling is dependent on the nature of the ligand but can be influenced to a limited extent by the pH of the exchange labelling mixture.
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