Elevated Striatal Dopamine Function in Immigrants and Their Children: A Risk Mechanism for Psychosis.

Abstract:

:Migration is a major risk factor for schizophrenia but the neurochemical processes involved are unknown. One candidate mechanism is through elevations in striatal dopamine synthesis and release. The objective of this research was to determine whether striatal dopamine function is elevated in immigrants compared to nonimmigrants and the relationship with psychosis. Two complementary case-control studies of in vivo dopamine function (stress-induced dopamine release and dopamine synthesis capacity) in immigrants compared to nonimmigrants were performed in Canada and the United Kingdom. The Canadian dopamine release study included 25 immigrant and 31 nonmigrant Canadians. These groups included 23 clinical high risk (CHR) subjects, 9 antipsychotic naïve patients with schizophrenia, and 24 healthy volunteers. The UK dopamine synthesis study included 32 immigrants and 44 nonimmigrant British. These groups included 50 CHR subjects and 26 healthy volunteers. Both striatal stress-induced dopamine release and dopamine synthesis capacity were significantly elevated in immigrants compared to nonimmigrants, independent of clinical status. These data provide the first evidence that the effect of migration on the risk of developing psychosis may be mediated by an elevation in brain dopamine function.

journal_name

Schizophr Bull

journal_title

Schizophrenia bulletin

authors

Egerton A,Howes OD,Houle S,McKenzie K,Valmaggia LR,Bagby MR,Tseng HH,Bloomfield MA,Kenk M,Bhattacharyya S,Suridjan I,Chaddock CA,Winton-Brown TT,Allen P,Rusjan P,Remington G,Meyer-Lindenberg A,McGuire PK,Mizrahi R

doi

10.1093/schbul/sbw181

subject

Has Abstract

pub_date

2017-03-01 00:00:00

pages

293-301

issue

2

eissn

0586-7614

issn

1745-1701

pii

sbw181

journal_volume

43

pub_type

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