NPJ Schizophr. 2015 Nov 11;1:15046. doi: 10.1038/npjschz.2015.46. eCollection 2015.
The effect of folate supplementation and genotype on cardiovascular and epigenetic measures in schizophrenia subjects.
NPJ schizophrenia
Vicki L Ellingrod, Tyler B Grove, Kyle J Burghardt, Stephan F Taylor, Gregory Dalack
Affiliations
Affiliations
- Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, Ann Arbor, MI, USA; Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA; Department of Psychology, University of Michigan, Ann Arbor, MI, USA.
- Department of Psychology, University of Michigan , Ann Arbor, MI, USA.
- Department of Pharmacy Practice, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University , Detroit, MI, USA.
- Department of Psychiatry, University of Michigan , Ann Arbor, MI, USA.
PMID: 27336047
PMCID: PMC4849464 DOI: 10.1038/npjschz.2015.46
Abstract
BACKGROUND: Metabolic syndrome may be related to folate's pharmacogenetically regulated metabolism and atypical antipsychotic (AAP) exposure.
AIMS: We examined folate supplementation on metabolic measures, endothelial functioning (Reactive Hyperemia Index (RHI)), and global methylation in AAP-treated schizophrenia subjects meeting NCEP-ATP-III-a metabolic syndrome criteria.
METHODS: Subjects were given 5 mg/day open label folate for 3 months. Baseline and end point measurements included RHI, body mass index, fasting metabolic laboratory measures, C-reactive protein, homocysteine, IL-6, and leptin. Subjects were genotyped for methylenetetrahydrofolate reductase (MTHFR) 677C/T and catechol-O-methyltransferase (COMT) 158 Val/Met, as well as global DNA methylation using the LUminometric Methylation Assay (LUMA).
RESULTS: Thirty-five subjects (mean age 50±9 years and 70% Caucasian) were included. At end point, RHI improved by 20% (P=0.02), homocysteine decreased 14% (P=0.006), and IL-6 decreased 13% (P=0.09). At baseline, 61% met endothelial dysfunction criteria (RHI<1.67), which decreased to 27% (P=0.0006) at end point. The MTHFR 677C/C+COMT 158Met/Met group also showed significant reduction in those meeting endothelial dysfunction (83% baseline and 16% end point (P=0.001)). Global methylation levels increased after supplementation (4.3%, P<0.0001), with subjects receiving olanzapine or clozapine experiencing greater methylation changes after folate supplementation. Folate may reduce AAP-associated metabolic risks.
CONCLUSIONS: We report significant reductions in the number of subjects meeting endothelial dysfunction. Given that all subjects met metabolic syndrome criteria, this may prove as a useful avenue to reducing cardiovascular disease risk. MTHFR and COMT genotypes may affect response and underlying changes in DNA methylation may help to explain the mechanistic underpinnings of these findings.
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