Abstract:
OBJECTIVE:In view of the previously described anti-inflammatory effects of insulin, we investigated the potential suppressive effect of insulin on plasma concentrations and expression of the chemokines, monocyte chemoattractant protein-1 (MCP-1) and regulated on activation normal T-cell expressed and secreted (RANTES) and their receptors, chemokine receptor (CCR)-2 and CCR-5, in mononuclear cells (MNCs). We also investigated the effect of insulin on other chemokines. RESEARCH DESIGN AND METHODS:Ten obese type 2 diabetic patients were infused with insulin (2 units/h with 100 ml of 5% dextrose/h) for 4 h. Another 8 and 6 type 2 diabetic patients were infused with 100 ml of 5% dextrose/h or saline for 4 h, respectively, and served as control subjects. Blood samples were obtained at 0, 2, 4, and 6 h. RESULTS:Insulin infusion significantly suppressed the plasma concentrations of MCP-1, eotaxin, and RANTES and the expression of RANTES, macrophage inflammatory protein (MIP)-1beta, CCR-2, and CCR-5 in MNCs at 2 and 4 h. Dextrose and saline infusions did not alter these indexes. CONCLUSIONS:A low-dose infusion of insulin suppresses the plasma concentration of key chemokines, MCP-1, and RANTES, and the expression of their respective receptors, CCR-2 and CCR-5, in MNCs. Insulin also suppresses the expression of RANTES and MIP-1beta in MNCs. These actions probably contribute to the comprehensive anti-inflammatory effect of insulin.
journal_name
Diabetes Carejournal_title
Diabetes careauthors
Ghanim H,Korzeniewski K,Sia CL,Abuaysheh S,Lohano T,Chaudhuri A,Dandona Pdoi
10.2337/dc09-2193subject
Has Abstractpub_date
2010-05-01 00:00:00pages
1103-8issue
5eissn
0149-5992issn
1935-5548pii
dc09-2193journal_volume
33pub_type
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