Association of interleukin-10 levels with age of onset and duration of illness in patients with major depressive disorder

Objective: To investigate peripheral levels of interleukin-10 (IL-10) in patients with major depressive disorder (MDD) and bipolar disorder (BD) and evaluate the relationship between IL-10, age of disease onset, and duration of illness. Methods: Case-control study nested in a population-based cohort of 231 individuals (age 18-24 years) living in Pelotas, state of Rio Grande do Sul, Brazil. Participants were screened for psychopathology using the Mini-International Neuropsychiatric Interview (MINI) and the Structured Clinical Interview for DSM-IV (SCID-I). Serum IL-10 was measured using commercially available immunoassay kits. Results: Peripheral levels of IL-10 were not significantly different in individuals with MDD or BD as compared to controls. However, higher IL-10 levels were found in MDD patients with a later disease onset as compared with controls or early-onset patients. In addition, IL-10 levels correlated negatively with illness duration in the MDD group. In the BD group, age of onset and duration of illness did not correlate with IL-10 levels. Conclusion: Higher levels of IL-10 are correlated with late onset of MDD symptoms. Moreover, levels of this cytokine might decrease with disease progression, suggesting that an anti-inflammatory balance may be involved in the onset of depressive symptoms and disease progression in susceptible individuals.

Bibliographic Details

Main Authors:	Gazal,Marta, Jansen,Karen, Souza,Luciano D., Oses,Jean P., Magalhães,Pedro V., Pinheiro,Ricardo, Ghisleni,Gabriele, Quevedo,Luciana, Kaster,Manuella P., Kapczinski,Flávio, Silva,Ricardo A. da
Format:	Digital revista
Language:	English
Published:	Associação Brasileira de Psiquiatria 2015
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-44462015000400005
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