Cerebral blood flow predicts differential neurotransmitter activity.

Abstract:

:Application of metabolic magnetic resonance imaging measures such as cerebral blood flow in translational medicine is limited by the unknown link of observed alterations to specific neurophysiological processes. In particular, the sensitivity of cerebral blood flow to activity changes in specific neurotransmitter systems remains unclear. We address this question by probing cerebral blood flow in healthy volunteers using seven established drugs with known dopaminergic, serotonergic, glutamatergic and GABAergic mechanisms of action. We use a novel framework aimed at disentangling the observed effects to contribution from underlying neurotransmitter systems. We find for all evaluated compounds a reliable spatial link of respective cerebral blood flow changes with underlying neurotransmitter receptor densities corresponding to their primary mechanisms of action. The strength of these associations with receptor density is mediated by respective drug affinities. These findings suggest that cerebral blood flow is a sensitive brain-wide in-vivo assay of metabolic demands across a variety of neurotransmitter systems in humans.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Dukart J,Holiga Š,Chatham C,Hawkins P,Forsyth A,McMillan R,Myers J,Lingford-Hughes AR,Nutt DJ,Merlo-Pich E,Risterucci C,Boak L,Umbricht D,Schobel S,Liu T,Mehta MA,Zelaya FO,Williams SC,Brown G,Paulus M,Honey GD,

doi

10.1038/s41598-018-22444-0

subject

Has Abstract

pub_date

2018-03-06 00:00:00

pages

4074

issue

1

issn

2045-2322

pii

10.1038/s41598-018-22444-0

journal_volume

8

pub_type

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