5-HT radioligands for human brain imaging with PET and SPECT

TY - JOUR

T1 - 5-HT radioligands for human brain imaging with PET and SPECT

AU - Paterson, Louise M

AU - Kornum, Birgitte R

AU - Nutt, David J

AU - Pike, Victor W

AU - Knudsen, Gitte M

N1 - © 2011 Wiley Periodicals, Inc.

PY - 2013/1

Y1 - 2013/1

N2 - The serotonergic system plays a key modulatory role in the brain and is the target for many drug treatments for brain disorders either through reuptake blockade or via interactions at the 14 subtypes of 5-HT receptors. This review provides the history and current status of radioligands used for positron emission tomography (PET) and single photon emission computerized tomography (SPECT) imaging of human brain serotonin (5-HT) receptors, the 5-HT transporter (SERT), and 5-HT synthesis rate. Currently available radioligands for in vivo brain imaging of the 5-HT system in humans include antagonists for the 5-HT(1A), 5-HT(1B), 5-HT(2A), and 5-HT(4) receptors, and for SERT. Here we describe the evolution of these radioligands, along with the attempts made to develop radioligands for additional serotonergic targets. We describe the properties needed for a radioligand to become successful and the main caveats. The success of a PET or SPECT radioligand can ultimately be assessed by its frequency of use, its utility in humans, and the number of research sites using it relative to its invention date, and so these aspects are also covered. In conclusion, the development of PET and SPECT radioligands to image serotonergic targets is of high interest, and successful evaluation in humans is leading to invaluable insight into normal and abnormal brain function, emphasizing the need for continued development of both SPECT and PET radioligands for human brain imaging.

AB - The serotonergic system plays a key modulatory role in the brain and is the target for many drug treatments for brain disorders either through reuptake blockade or via interactions at the 14 subtypes of 5-HT receptors. This review provides the history and current status of radioligands used for positron emission tomography (PET) and single photon emission computerized tomography (SPECT) imaging of human brain serotonin (5-HT) receptors, the 5-HT transporter (SERT), and 5-HT synthesis rate. Currently available radioligands for in vivo brain imaging of the 5-HT system in humans include antagonists for the 5-HT(1A), 5-HT(1B), 5-HT(2A), and 5-HT(4) receptors, and for SERT. Here we describe the evolution of these radioligands, along with the attempts made to develop radioligands for additional serotonergic targets. We describe the properties needed for a radioligand to become successful and the main caveats. The success of a PET or SPECT radioligand can ultimately be assessed by its frequency of use, its utility in humans, and the number of research sites using it relative to its invention date, and so these aspects are also covered. In conclusion, the development of PET and SPECT radioligands to image serotonergic targets is of high interest, and successful evaluation in humans is leading to invaluable insight into normal and abnormal brain function, emphasizing the need for continued development of both SPECT and PET radioligands for human brain imaging.

KW - Brain/diagnostic imaging

KW - Humans

KW - Positron-Emission Tomography/methods

KW - Radiopharmaceuticals/metabolism

KW - Receptors, Serotonin/metabolism

KW - Serotonin/chemistry

KW - Serotonin Antagonists/metabolism

KW - Serotonin Plasma Membrane Transport Proteins/metabolism

KW - Tomography, Emission-Computed, Single-Photon/methods

U2 - 10.1002/med.20245

DO - 10.1002/med.20245

M3 - Review

C2 - 21674551

SN - 0198-6325

VL - 33

SP - 54

EP - 111

JO - Medicinal Research Reviews

JF - Medicinal Research Reviews

IS - 1

ER -