Regulatory T cells and IL-10 levels are reduced in patients with vulnerable coronary plaques

Atherosclerosis
Jacob GeorgeAri Shamiss

Abstract

Despite having a similar large extent of atherosclerotic coronary affliction, some patients suffer of recurrent cardiac events, whereas others remain asymptomatic. We hypothesized the existence of a systemic "signature" that could distinguish "vulnerable" patients with preexisting coronary atherosclerosis from those having similar risk factors and atheromatous burden, but no history of clinically evident plaque rupture/erosion. Twenty three patients who had at least two prior myocardial infarctions ("vulnerable group") were matched in respect to their background and coronary atherosclerosis extent with twenty one patients without a history of previous myocardial infarction who underwent routine coronary angiography before valvular surgery. We studied a panel of cytokines, antibodies and hormones including IL-6, IL-10, IL-12, antibodies to β2 glycoprotein I (β2GPI), antibodies to oxidized-LDL, adiponectin and resistin, along with levels of circulating EPCs and Tregs. A significantly higher level of Treg cells was present in the control (73.4%±4) than in the "vulnerable patient" group (62.2%±10.7), p<0.001. IL-10 level was also significantly higher in the control than in the vulnerable patients (2.6±1.2 pg/ml versus 0.9±0.1 pg/ml...Continue Reading

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