Teens with Bipolar Disorder Have More Inflammation, Cardiovascular Risks
Bipolar disorder has been linked to cardiovascular disease. New research by Jessica Hatch and colleagues shows that inflammation may be at the root of this connection. At the 2016 meeting of the Society of Biological Psychiatry, the researchers showed that teens with bipolar disorder have higher levels of inflammatory marker interleukin 6.
Hatch and colleagues assessed the blood of 60 teens with bipolar I or II disorder and 20 healthy controls for a variety of biomarkers, including the inflammatory proteins interleukin 6, interleukin 10, and TNF alpha; VEGF, which is responsible for the production of new blood vessels; and brain-derived neurotrophic factor (BDNF), which protects neurons. The researchers also assessed the participants’ cardiovascular health, performing the carotid intima media thickness test to estimate how much plaque is in the arteries, and measuring how well the patients’ arteries dilate in response to changes in bloodflow.
Participants with bipolar disorder had higher levels of interleukin 6 than healthy controls, regardless of whether their bipolar illness was symptomatic. Low BDNF was linked to greater carotid intima thickness in participants with symptomatic bipolar disorder, and vascular measurements suggest a possible mechanism by which bipolar disorder increases cardiovascular risk.