The P300 event-related brain potential as a neurobiological endophenotype for substance use disorders: A meta-analytic investigation
until further notice
Number of pages
SourceNeuroscience and Biobehavioral Reviews, 36, 1, (2012), pp. 572-603
Article / Letter to editor
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SW OZ BSI OGG
Neuroscience and Biobehavioral Reviews
Endophenotypes are intermediate phenotypes on the putative causal pathway from genotype to phenotype and can aid in discovering the genetic etiology of a disorder. There are currently very few suitable endophenotypes available for substance use disorders (SUD). The amplitude of the P300 event-related brain potential is a possible candidate. The present study determined whether the P300 amplitude fulfils two fundamental criteria for an endophenotype: (1) an association with the disorder (disease marker), and (2) presence in unaffected biological relatives of those who have the disorder (vulnerability marker). For this purpose, two separate meta-analyses were performed. Meta-analysis 1 investigated the P300 amplitude in relation to SUD in 39 studies and Meta-analysis 2 investigated P300 amplitude in relation to a family history (FH+) of SUD in 35 studies. The findings indicate that a reduced P300 amplitude is significantly associated with SUD (d = 0.51) and, though to a lesser extent, with a FH+ of SUD (d = 0.28). As a disease maker, the association between reduced P300 amplitude and SUD is significantly larger for participants that were exclusively recruited from treatment facilities (d = 0.67) than by other methods (i.e., community samples and family studies; d = 0.45 and 0.32, respectively), and larger for abstinent SUD patients (d = 0.71) than for current substance users (d = 0.37). Furthermore, in contrast to FH+ males, a P300 amplitude reduction seems not to be present in FH+ females (d = −0.07). Taken together, these results suggest that P300 amplitude reduction can be both a useful disease and vulnerability marker and is a promising neurobiological endophenotype for SUD, though only in males. Implications and future directions are discussed.
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