Abstract
In this study, four 99mTc-labeled fatty acid analogues including [99mTcO]3+ and [99mTc≡N]2+ cores were successfully synthesized and fully characterized. The radiochemical purity of those compounds was over 90 % and they were stable when incubated in a rat serum for 3 h at 37 °C. The biodistribution studies in mice demonstrated that compounds labeled with [99mTcO]3+ exhibited good uptakes (6.11 %ID/g of [99mTcO]-MAMA-DTA and 3.89 %ID/g of [99mTcO]-MAMA-UTA at 1 min postinjection) and the maximum heart to blood ratio was 5.91 at 30 min postinjection of [99mTcO]-MAMA-DTA. While the others labeled with [99mTc≡N]2+ showed lower uptakes and faster washout from the myocardium.
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Abbreviations
- ATP:
-
Adenosine triphosphate
- PET:
-
Positron emission tomography
- SPECT:
-
Single-photon emission computed tomography
- IPPA:
-
123I-iodophenylpentadecanoic acid
- BMIPP:
-
15-(p-[123I]iodophenyl)-3-methylpentadecanoic acid
- SDH:
-
Succinic dihydrazide
- GH:
-
Glucoheptonate
- [99mTc]-MAMA-HDA:
-
[99mTc]-MAMA-hexadecanoic acid
- [99mTcO]-MAMA-DTA (1):
-
[99mTcO]-MAMA-decanoyl thiophenepropanoic acid
- [99mTcO]-MAMA-UTA (2):
-
[99mTcO]-MAMA-undecanoyl thiophenepropanoic acid
- [99mTc≡N]-MAMA-DTA (3):
-
[99mTc≡N]-MAMA-decanoyl thiophenepropanoic acid
- [99mTc≡N]-MAMA-UTA (4):
-
[99mTc≡N]-MAMA-undecanoyl thiophenepropanoic acid
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Acknowledgments
We gratefully acknowledged the Significant New Drugs Development (Grant No. 2014ZX09507007-001), Natural Science Foundation of China (No. 21371026) and Science and Technology Support Program (No. 2014BAA03B03) for financial support.
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Li, X., Wu, A., Xue, Q. et al. Synthesis and biological evaluation of fatty acids containing 99mTc-oxo and 99mTc-nitrido for myocardial metabolism imaging. J Radioanal Nucl Chem 307, 1429–1438 (2016). https://doi.org/10.1007/s10967-015-4232-0
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DOI: https://doi.org/10.1007/s10967-015-4232-0