Abstract
Objective
To investigate if Areca catechu L. treatment could ameliorate depressive symptoms and cognitive decline by facilitating myelination processes in prefrontal cortex.
Methods
A mouse model of cuprizoneinduced demyelination was used to mimic demyelinating disease. Two concentrations of A. catechu nut extract (ANE; 1% and 2%) were administered orally in the diet for 8 weeks. Depressive symptoms and cognition-associated behaviors were evaluated in tests of locomotor activity, tail suspension, and forced swimming; spatial memory was tested with the Y-maze. Expression of myelin basic protein (MBP), 2′,3′-cyclic-nucleotide 3′-phosphodiesterase (CNPase), glutathione S-transferases pi (GSTpi), brain-derived neurotrophic factor (BDNF), and the transcription factor cyclic adenosine monophosphate (cAMP) response element-binding (CREB) were evaluated by western blot.
Results
Animals subjected to demyelination showed hyperactivity (P<0.01), impaired spatial memory (P<0.01), and depressive behaviors (P<0.05). Internally, they displayed signifificant myelin damage in the cortex, lower expression of CNPase and GSTpi, slightly decreased BDNF (P>0.05), and signifificantly reduced p-CREB (P<0.05). Nevertheless, ANE treatment demonstrated signifificant anti-depressant activity and enhancement of working memory (P<0.05 or 0.01). In addition, ANE treatment increased MBP, CNPase and GSTpi protein expression in prefrontal cortex (P<0.05). Concomitant with increased BDNF production (P<0.05), ANE treatment up-regulated phosphorylated CREB, but without statistical signifificance (P>0.05).
Conclusion
ANE treatment might ameliorate depressive symptoms and cognitive decline by facilitating myelination processes in prefrontal cortex via induction of BDNF-CREB activation.
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Adilijiang, A., Guan, T., Xu, Zz. et al. The Aqueous Fraction of Areca catechu Nut Ameliorates Demyelination in Prefrontal Cortex-Induced Depressive Symptoms and Cognitive Decline through Brain-Derived Neurotrophic Factor-Cyclic Adenosine Monophosphate Response Element-Binding Activation. Chin. J. Integr. Med. (2016). https://doi.org/10.1007/s11655-016-2455-8
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DOI: https://doi.org/10.1007/s11655-016-2455-8