These authors contributed equally to this work.
Immunosenescence is associated with human cytomegalovirus and shortened telomeres in type I bipolar disorder
Version of Record online: 10 SEP 2013
© 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.
Volume 15, Issue 8, pages 832–838, December 2013
How to Cite
Immunosenescence is associated with human cytomegalovirus and shortened telomeres in type I bipolar disorder. Bipolar Disord 2013: 15: 832–838. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd., , , , , , .
- Issue online: 3 DEC 2013
- Version of Record online: 10 SEP 2013
- Manuscript Accepted: 26 APR 2013
- Manuscript Received: 8 OCT 2012
- bipolar disorder;
Bipolar disorder (BD) has been associated with persistent low-grade inflammation and premature cell senescence, as shown by reduced telomere length (TL). The human cytomegalovirus (CMV) has increasingly been implicated in accelerated immunosenescence in aging studies. Here, we compared CMV serology and its relationships with cell senescence markers, including TL and lymphocyte subsets, in patients with type I BD and healthy controls.
Twenty-two euthymic female patients with BD type I and 17 age-matched healthy controls were selected for the study. A sample of blood was collected and mononuclear cells and DNA were isolated and TL measured. CMV immunoglobulin M (IgM) and IgG titers were measured using chemiluminescent assays. Lymphocyte subsets [T, natural killer (NK) and NKT] were phenotyped by flow cytometry.
Individuals with BD had shorter TLs but higher CMV IgG levels than controls (both p < 0.01). CMV IgG level was inversely correlated with TL. None of the subjects showed IgM reactivity for CMV, excluding acute viral infection. CMV IgG level was associated with expansion of senescent CD8+CD28− T cells and NK cells, which are involved in viral control.
These data support the hypothesis of accelerated aging in BD, as shown by shortened telomeres, higher seropositivity for CMV, and expansion of senescent T cells.