PET Imaging of ABC Transporters at the Blood-Brain Barrier

Lara Garcia Varela, Pascalle Mossel, Marcel Benadiba, Heli Savolainen, Nicola Antonio Colabufo, Albert D. Windhorst, Philip H. Elsinga, Aren van Waarde, Gert Luurtsema

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

Abstract

The function of ATP-binding cassette (ABC) transporters at the blood-brain barrier (BBB) is to protect the brain from toxic compounds. Additionally,
they play a crucial role in the onset and progression of several central nervous system (CNS) diseases as well as in drug resistance. Many compounds
were identified as substrates, inhibitors, inducers, or activators for ABC transporters, causing important drug-drug interactions. PET imaging represents
an excellent tool for assessing the function and expression of ABC transporters. Over the last years, many PET tracers with different characteristics
have been developed, mainly for measuring P-glycoprotein (P-gp) function at the BBB. Although (R)-[11C]verapamil or [11C]N-desmethylloperamide
are considered as the “gold standard” P-gp tracers, they have several drawbacks such as its high affinity to P-gp which limits their use for assessing P-gp increased function. Therefore, PET tracers with lower affinity to the transporter have been developed and studied in different species. The assessment of ABC transporters by PET imaging can provide new insight into the physiology and pathophysiology of different CNS diseases and may open new avenues for therapies. Moreover, PET can be used for screening the affinity of new entities toward various ABC transporters and thus enhance the development of CNS drugs.
Original languageEnglish
Title of host publicationPET and SPECT of Neurobiological Systems
EditorsRudi Dierckx, Andreas Otte, Erik de Vries, Aren van Waarde, Adriaan Lammertsma
Place of PublicationCham
PublisherSpringer Nature
Chapter22
Pages809-850
Number of pages42
Edition2
ISBN (Print)978-3-030-53175-1
Publication statusPublished - 2021

Keywords

  • POSITRON EMISSION TOMOGRAPHY
  • ABC Transporters
  • P-GLYCOPROTEIN
  • IMAGING
  • QUANTIFICATION
  • Kinetic modelling
  • Radiochemistry
  • Brain imaging
  • HUMAN BRAIN

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