期刊
DIABETES RESEARCH AND CLINICAL PRACTICE
卷 191, 期 -, 页码 -出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.diabres.2022.110077
关键词
Monocyte; STEMI; CCR2; CD14; CHF; LPS; Glucose; Inflammation
资金
- National Institutes of Health [1R34HL121402]
This study found that individuals with elevated blood glucose after STEMI showed a heightened response to pro-inflammatory activation in monocytes, which may impair or delay post-STEMI myocardial healing and increase the incidence of chronic heart failure.
Aims: Following ST-segment elevation myocardial infarction (STEMI), recruitment and activation of monocytes [classical (CD14++CD16-CCR2++), intermediate (CD14++CD16+CCR2+), non-classical (CD14LowCD16++CCR2Low)] are needed for myocardial wound healing. Monocyte surface receptor C-C chemokine receptor type 2 (CCR2) is responsible for monocyte chemotaxis to sites of inflammation and the lipopolysaccharide (LPS)binding protein co-receptor, CD14, is involved in pro-inflammatory monocyte activation. The purpose of this investigation was to determine the effects of ex-vivo LPS activation on monocyte subset CD14 and CCR2 expression in post-STEMI individuals with normal and elevated random blood glucose.Methods: Post-STEMI subjects were identified as normal random glucose (NG, <98 mg/dL, n = 13) or impaired random glucose (IG, >= 98 mg/dL, n = 26) and monocytes were analyzed for non-activated and LPS-activated (1 mu g/mL for 4 h) CCR2 and CD14 expression.Results: Non-activated intermediate monocytes from IG showed decreased CD14 expression when compared to NG, which was maintained following LPS-activation. The NG group showed a larger absolute reduction in classical CCR2 expression, leading to a significant difference between NG and IG following LPS-activation. Conclusion: Results suggest a heightened response to pro-inflammatory activation in IG following STEMI, which may impair or delay post-STEMI myocardial healing, and thus increase the incidence of chronic heart failure. NIH 1R34HL121402.
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