Background: Hitherto literature indicates that mood stabilizers exert variable effects on oxidative and
antioxidative systems, which are involved in the pathogenesis of Bipolar Disorder. Herein we primarily sought to
characterize markers of peripheral oxidative stress during euthymia in adults with Bipolar Disorder under current intake of
different mood stabilizers (lithium, anticonvulsants and atypical antipsychotics/AAPs).
Methods: Peripheral oxidative stress parameters (TBARS/Thiobarbituric acid-reactive-substances, MDA/ malondialdehyde
and carbonyl proteins) and antioxidative markers (SOD/Cu/Zn superoxide dismutase, GST/glutathione Stransferase
and TAC/total antioxidative capacity) were measured in serum of 115 euthymic bipolar individuals (50
females, 65 males; HAMD<11 and YMRS<8). Differences in (anti)oxidative markers between bipolar participants treated
with different mood stabilizing medication were tested with MANCOVAS and ANCOVAS with SPSS.21.
Results: Bipolar individuals taking lithium had significantly lower oxidative parameters than test persons without lithium
(multivariate effect for MDA and TBARS: F(2/182)= 3.956, p= 0.021; univariate effect for MDA: F(2/182)= 7.880, p=
0.006, Partial η2= 0.041). Subjects with AAPs had significantly higher MDA and TBARS levels compared to participants
without AAPs (multivariate effect F(2/182)= 3.122, p= 0.046, Partial η2= 0.033). Patients taking anticonvulsants had
significantly lower GST levels than patients without antiepileptic medication (F(1/165)= 4.501, p= 0.035, Partial η2=
Conclusion: Lithium taking participants had the lowest MDA and TBARS levels, while AAP taking test persons had high
oxidative stress markers. The observed effects on oxidative markers may provide a mechanistic basis for understanding
lithium’s neuroprotective effects.