Abstract:
:Lorlatinib (PF-06463922) is a next-generation small-molecule inhibitor of the orphan receptor tyrosine kinase c-ros oncogene 1 (ROS1), which has a kinase domain that is physiologically related to anaplastic lymphoma kinase (ALK), and is undergoing Phase I/II clinical trial investigations for non-small cell lung cancers. An early goal is to measure the concentrations of this drug in brain tumour lesions of lung cancer patients, as penetration of the blood-brain barrier is important for optimal therapeutic outcomes. Here we prepare both 11C- and 18F-isotopologues of lorlatinib to determine the biodistribution and whole-body dosimetry assessments by positron emission tomography (PET). Non-traditional radiolabelling strategies are employed to enable an automated multistep 11C-labelling process and an iodonium ylide-based radiofluorination. Carbon-11-labelled lorlatinib is routinely prepared with good radiochemical yields and shows reasonable tumour uptake in rodents. PET imaging in non-human primates confirms that this radiotracer has high brain permeability.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Collier TL,Normandin MD,Stephenson NA,Livni E,Liang SH,Wooten DW,Esfahani SA,Stabin MG,Mahmood U,Chen J,Wang W,Maresca K,Waterhouse RN,El Fakhri G,Richardson P,Vasdev Ndoi
10.1038/ncomms15761subject
Has Abstractpub_date
2017-06-08 00:00:00pages
15761issn
2041-1723pii
ncomms15761journal_volume
8pub_type
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