Inter-relation between brain-derived neurotrophic factor and antioxidant enzymes in bipolar disorder

Date
2016Author
Mansur, Rodrigo B. [UNIFESP]
Santos, Camila M. [UNIFESP]
Rizzo, Lucas B. [UNIFESP]
Cunha, Graccielle R. [UNIFESP]
Asevedo, Elson [UNIFESP]
Noto, Mariane N. [UNIFESP]
Pedrini, Mariana [UNIFESP]
Zeni, Maiara [UNIFESP]
Cordeiro, Quirino [UNIFESP]
McIntyre, Roger S. [UNIFESP]
Brietzke, Elisa [UNIFESP]
Type
ArtigoISSN
1398-5647DOI
10.1111/bdi.12418Metadata
Show full item recordAbstract
Objectives: Accumulating evidence indicates that oxidative stress and neurotrophins have a bidirectional relationship. In this post hoc, exploratory analysis, we investigated the association between plasma brain-derived neurotrophic factor (BDNF) levels and activities of the antioxidant enzymes glutathione peroxidase (GPx) and superoxide dismutase (SOD) in individuals with bipolar disorder (BD) and healthy controls. Methods: We measured plasma levels of BDNF and activities of GPx and SOD in individuals with BD (n=59) and healthy controls (n=26). Information related to current and past psychiatric/medical history, as well as to metabolic comorbidities, was also reported. Results: There were negative correlations between BDNF, GPx (r=-.449, P=.001) and GPx/SOD ratio (r=-.503, P<.001), and a positive correlation between BDNF and SOD (r=.254, P=.020). There was a moderating effect of body mass index (BMI) on the association between BDNF and GPx/SOD rate ratio [(RR)=1.002, P=.034] interactions between impaired glucose metabolism (IGM), GPx (RR=1.016, P=.033), and GPx/SOD ratio (RR=1.026, P=.002) were also observed. These results were significant in models that included age, gender, alcohol, tobacco and medication use. Conclusions: There was a robust and independent correlation between peripheral BDNF and antioxidant enzyme activities in individuals with BD, which was moderated by metabolic comorbidities. These results reinforce the concept that these systems are associated and further extend knowledge of the putative effect of metabolic comorbidities in the pathophysiological substrates of BD.
Citation
Bipolar Disorders. Hoboken, v. 18, n. 5, p. 433-439, 2016.Keywords
bipolar disorderbody mass index
brain-derived neurotrophic factor
diabetes
oxidative stress
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