Investigation of polymorphism in the MDR1 gene and antidepressant-induced mania.
The involvement of the multi-drug-resistant 1 P-glycoprotein gene (MDR1 P-gp) in the transport of antidepressants across the blood-brain barrier makes it a good candidate for the prediction of antidepressant response and side effects. We investigated the role of the MDR1 P-gp gene in predicting the induction of mania in bipolar patients (BP) treated with proserotonergic drugs. Participants met the DSM-IV criteria for BP or BPII and had at least one depressive episode treated with proserotonergic antidepressants. The first group (n=26) included patients with at least one DSM-IV manic/hypomanic episode developed during antidepressant treatment; the second group (N=29) included patients with no antidepressant-induced switches. The common polymorphism of the MDR1 was genotyped for both groups and comparison was made with respect to the presence/absence of induced mania between the two groups. No association between antidepressant-induced mania and the MDR1 alleles or genotypes was found (chi2=1.85, 2 df, P=0.39; chi2=0.13, 1 df, P=0.72).
De Luca
V
V
Neurogenetics Section, Department of Psychiatry, University of Toronto, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
Mundo
E
E
Trakalo
J
J
Wong
G W H
GW
Kennedy
J L
JL
D000928:Antidepressive Agents / Q000009:adverse effects*; D001714:Bipolar Disorder / Q000139:chemically induced* / Q000235:genetics*; D016009:Chi-Square Distribution; D005787:Gene Frequency / Q000235:genetics; D019450:Genes, MDR / Q000235:genetics*; D005838:Genotype; D006801:Humans; D011110:Polymorphism, Genetic / Q000235:genetics*
D000928:Antidepressive Agents