4.3 Article

Leptin Is Associated with Mood Status and Metabolic Homeostasis in Patients with Bipolar Disorder

Journal

NEUROPSYCHOBIOLOGY
Volume 70, Issue 4, Pages 203-209

Publisher

KARGER
DOI: 10.1159/000366488

Keywords

Bipolar disorder; Depression; Leptin; Adiponectin; Resistin

Funding

  1. National Research Foundation of Korea - Korean Government [2012R1A1A2043639]

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Background: Patients with bipolar disorder are at a high risk for becoming obese. Adipokines are associated with depression and obesity via the inflammatory process. However, few studies have investigated the associations between depression and leptin, adiponectin and resistin levels in patients with bipolar disorder. We explored the associations between serum levels of leptin, adiponectin and resistin and mood and metabolic status in patients with bipolar disorder. Methods: Body mass index (BMI) and serum leptin, adiponectin and resistin levels were assessed in 94 Korean patients with bipolar disorder. The Hamilton Rating Scale for Depression-17 and the Young Mania Rating Scale were used to assess mood state. Results: Leptin (17.19 +/- 13.08 vs. 10.47 +/- 10.05 ng/ml; p = 0.008) and adiponectin (10.51 +/- 8.37 vs. 5.91 +/- 2.82 mu g/ml; p = 0.001) levels were higher in female than in male patients. After adjusting for mood state, age, smoking, alcohol habit, and BMI in a multivariate analysis of covariance (MANCOVA), leptin (17.86 +/- 1.22 vs. 10.05 +/- 1.48 ng/ml; p < 0.001) and adiponectin (10.18 +/- 0.98 vs. 6.40 +/- 1.19 mu g/ml; p = 0.027) levels were still higher in female than in male patients. Compared to euthymic patients, depressed patients had higher levels of leptin (17.37 +/- 14.69 vs. 11.65 +/- 9.04 ng/ml; p = 0.024), but there was no significant difference in adiponectin and resistin levels between the two groups. After adjusting for age, gender and BMI in the MANCOVA, leptin levels were also significantly higher in depressed (16.78 +/- 1.34 ng/ml) than in euthymic patients (10.73 +/- 1.22 ng/ml; p = 0.001). Conclusion: Leptin is closely associated with the regulation of mood and metabolic homeostasis in patients with bipolar disorder. (C) 2014 S. Ka rger AG, Basel

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