Liao IH, Corbett BA, Gilbert DL, Bunge SA, Sharp FR. Blood gene expression correlated with tic severity in medicated and unmedicated patients with Tourette Syndrome.
Pharmacogenomics 2011;
11:1733-41. [PMID:
21142917 DOI:
10.2217/pgs.10.160]
[Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND
Tourette Syndrome (TS) has been linked to both genetic and environmental factors. Gene-expression studies provide valuable insight into the causes of TS; however, many studies of gene expression in TS do not account for the effects of medication.
MATERIALS & METHODS
To investigate the effects of medication on gene expression in TS patients, RNA was isolated from the peripheral blood of 20 medicated TS subjects (MED) and 23 unmedicated TS subjects (UNMED), and quantified using whole-genome Affymetrix microarrays.
RESULTS
D2 dopamine receptor expression correlated positively with tic severity in MED but not UNMED. GABA(A) receptor ε subunit expression negatively correlated with tic severity in UNMED but not MED. Phenylethanolamine N-methyltransferase expression positively correlated with tic severity in UNMED but not MED.
CONCLUSION
Modulation of tics by TS medication is associated with changes in dopamine, norepinephrine and GABA pathways.
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