Abstract
Background
This study aimed to determine the association between circulating leptin levels and total depressive symptoms as well as depressive symptom dimensions (cognitive and somatic) after controlling for important confounding factors.
Methods
The study sample was comprised of 135 participants with the metabolic syndrome. Depressive symptoms were measured using the Beck Depression Inventory—II. Leptin was measured using a leptin-specific enzyme immunoassay. Inflammation was assessed using C-reactive protein and interleukin-6 levels.
Results
Leptin was significantly associated with somatic depressive symptoms (β = 0.33, P = 0.018), but not total depressive symptoms (β = 0.27, P = 0.067) or cognitive depressive symptoms (β = 0.21, P = 0.182), after controlling for age, gender, body mass index, and insulin resistance. Further adjustment for C-reactive protein and interleukin-6 levels did not alter the relationship (β = 0.32, P = 0.023) between circulating leptin levels and somatic depressive symptoms.
Conclusions
Leptin is independently associated with somatic depressive symptoms in patients with the metabolic syndrome.
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Acknowledgments
This study was funded by National Institutes of Health grant P01 HL365888.
Conflict of Interest
The authors have no conflict of interest to disclose.
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Chirinos, D.A., Goldberg, R., Gellman, M. et al. Leptin and its Association with Somatic Depressive Symptoms in Patients with the Metabolic Syndrome. ann. behav. med. 46, 31–39 (2013). https://doi.org/10.1007/s12160-013-9479-5
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DOI: https://doi.org/10.1007/s12160-013-9479-5