Abstract
The present study shows the development of 99mTc-labeling of the P149-QY peptide, a modified fragment of human alpha-fetoprotein (hAFP), with the intention of potential application for diagnosis of AFP positive tumors. An efficient preparation of 99mTc-labeled P149-QY using HYNIC was developed. It has been shown that the free sulfhydryl groups in P149-QY can be protected with N-ethylmaleimide, preventing the radiolabeled peptide from loss of its biological activity. The biodistribution studies revealed favorable pharmacokinetics and a better specificity to the mammary adenocarcinoma tumor for the SH-protected radiolabeled P149-QY peptide in comparison to the radioiodinated and to the directly 99mTc-labeled peptide.
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Maurin, M., Garnuszek, P., Karczmarczyk, U. et al. Studies on 99mTc-labeling of the modified fragment of human alfa-fetoprotein (P149-QY). J Radioanal Nucl Chem 275, 101–107 (2008). https://doi.org/10.1007/s10967-007-6980-y
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DOI: https://doi.org/10.1007/s10967-007-6980-y