4.7 Article

The Influence of Vitamin D Status on Cognitive Ability in Patients with Bipolar Disorder and Healthy Controls

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NUTRIENTS
卷 15, 期 19, 页码 -

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MDPI
DOI: 10.3390/nu15194111

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bipolar disorder; vitamin D; functional vitamin D deficiency; 25(OH)D; 24,25(OH)2D; VMR

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Recent evidence on the association between vitamin D and cognition in mentally healthy individuals is inconsistent. This study aimed to investigate the association between vitamin D metabolites and cognitive ability in individuals with bipolar disorder. The results showed no significant association between vitamin D metabolites and cognitive domains. Therefore, this study does not support the role of vitamin D metabolism as a modulating factor of cognitive function in euthymic bipolar disorder patients.
Recent evidence on the association between vitamin D and cognition in mentally healthy individuals is inconsistent. Furthermore, the link between vitamin D and cognitive ability in individuals with bipolar disorder has not been studied yet. Thus, we aimed to investigate the association between 25-hydroxyvitamin D (25(OH)D), 24,25 dihydroxyvitamin D (24,25(OH)2D, the vitamin D metabolite ratio (VMR) and cognition in a cohort of euthymic patients with bipolar disorder. Vitamin D metabolites were measured simultaneously by liquid-chromatography tandem mass-spectrometry in serum samples from 86 outpatients with bipolar disorder and 93 healthy controls. Neither the inactive precursor 25(OH)D, nor the primary vitamin D catabolite 24,25(OH)2D, or the vitamin D metabolite ratio were significantly associated with the domains attention, memory, or executive function in individuals with bipolar disorder and healthy controls. Further, no vitamin D deficiency effect or interaction group x vitamin D deficiency was found in the cognitive domain scores. In summary, the present study does not support vitamin D metabolism as a modulating factor of cognitive function in euthymic BD patients. Considering the current study's cross-sectional design, future research should expand these results in a longitudinal setting and include additional aspects of mental health, such as manic or depressive symptoms, long-term illness course and psychopharmacological treatment.

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