Synthesis and in vivo evaluation of [11C]tucatinib for HER2-targeted PET imaging
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Synthesis and in vivo evaluation of [11C]tucatinib for HER2-targeted PET imaging. / Müller, Marius; Shalgunov, Vladimir; Hvass, Lars; Jørgensen, Jesper T.; Kramer, Vasko; Staudt, Markus; Battisti, Umberto Maria; Kjaer, Andreas; Herth, Matthias M.
I: Bioorganic and Medicinal Chemistry Letters, Bind 80, 129088, 2023.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › fagfællebedømt
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TY - JOUR
T1 - Synthesis and in vivo evaluation of [11C]tucatinib for HER2-targeted PET imaging
AU - Müller, Marius
AU - Shalgunov, Vladimir
AU - Hvass, Lars
AU - Jørgensen, Jesper T.
AU - Kramer, Vasko
AU - Staudt, Markus
AU - Battisti, Umberto Maria
AU - Kjaer, Andreas
AU - Herth, Matthias M.
N1 - Publisher Copyright: © 2022 The Author(s)
PY - 2023
Y1 - 2023
N2 - Tucatinib is a selective human epidermal growth factor receptor 2 (HER2) tyrosine kinase inhibitor approved by the U.S. Food and Drug Administration (FDA) in April 2020 for HER2-positive lesions in metastatic breast cancer patients, including CNS metastases. In this article, we attempted to develop the first small molecule, blood–brain-barrier (BBB) penetrant HER2 PET imaging probe based on tucatinib. [11C]tucatinib was synthesized via a Stille-coupling from the respective trimethylstannyl precursor and its biodistribution was evaluated in NMRI nude mice bearing HER2-overexpressing human ovarian cancer cells (SKOV-3). No significant tumor accumulation was observed despite its high affinity for HER-2 receptors (IC50 = 6.9 nM). High liver and intestinal uptake indicate that [11C]tucatinib is too lipophilic to be used as a tumor targeting PET tracer. Therefore, chemical modifications of [11C]tucatinib are needed to increase the polarity for tumor imaging. Tucatinib as an FDA approved drug is still an interesting platform to develop the first small molecule HER2-selective PET tracer. The study highlights the differences between a drug, which needs to be effective, and an imaging agent, which is dependent on contrast.
AB - Tucatinib is a selective human epidermal growth factor receptor 2 (HER2) tyrosine kinase inhibitor approved by the U.S. Food and Drug Administration (FDA) in April 2020 for HER2-positive lesions in metastatic breast cancer patients, including CNS metastases. In this article, we attempted to develop the first small molecule, blood–brain-barrier (BBB) penetrant HER2 PET imaging probe based on tucatinib. [11C]tucatinib was synthesized via a Stille-coupling from the respective trimethylstannyl precursor and its biodistribution was evaluated in NMRI nude mice bearing HER2-overexpressing human ovarian cancer cells (SKOV-3). No significant tumor accumulation was observed despite its high affinity for HER-2 receptors (IC50 = 6.9 nM). High liver and intestinal uptake indicate that [11C]tucatinib is too lipophilic to be used as a tumor targeting PET tracer. Therefore, chemical modifications of [11C]tucatinib are needed to increase the polarity for tumor imaging. Tucatinib as an FDA approved drug is still an interesting platform to develop the first small molecule HER2-selective PET tracer. The study highlights the differences between a drug, which needs to be effective, and an imaging agent, which is dependent on contrast.
KW - Breast cancer
KW - Carbon-11
KW - HER2
KW - PET imaging
KW - Radiolabeling
KW - Tucatinib
U2 - 10.1016/j.bmcl.2022.129088
DO - 10.1016/j.bmcl.2022.129088
M3 - Journal article
C2 - 36455802
AN - SCOPUS:85143536861
VL - 80
JO - Bioorganic & Medicinal Chemistry Letters
JF - Bioorganic & Medicinal Chemistry Letters
SN - 0960-894X
M1 - 129088
ER -
ID: 331782506