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van Wijk, J.P. et al.

van Wijk, Cabezas, Coll, Joven, Rabelink, de Koning,

Effects of rosiglitazone on postprandial leukocytes and cytokines in type 2 diabetes.

OBJECTIVE: We postulated that in type 2 diabetes, the postprandial phase is a pro-inflammatory state that can be modulated by PPAR-gamma agonists. For this purpose, we determined the effects of rosiglitazone (8 mg/d) on postprandial leukocyte counts and pro-inflammatory cytokines (IL-6 and IL-8) in patients with type 2 diabetes. METHODS AND RESULTS: A randomized, 8-week, cross-over, placebo-controlled, double-blind clinical trial was performed in 19 patients with type 2 diabetes. Standardized 6-h oral fat-loading tests were performed after each treatment period. During placebo treatment, blood leukocytes increased to a maximum 6-h postprandially, due to significant increases in neutrophils and lymphocytes. Concomitant postprandial increases were observed for IL-6 and IL-8, the major chemokines responsible for leukocyte recruitment. Rosiglitazone reduced the incremental area under the curves (dAUCs) for IL-6 (-63%, p<0.01) and IL-8 (-16%, p<0.05). The dAUC for leukocytes decreased with 37% (p<0.05), due to a specific reduction of neutrophils (-39%, p<0.05). CONCLUSIONS: Rosiglitazone attenuated the postprandial increases of neutrophils, IL-6 and IL-8 in patients with type 2 diabetes. Since inflammation is a major force driving atherosclerosis, and man lives in a postprandial period most part of the day, a reduced inflammatory response after a meal may delay progression of atherosclerosis. CONDENSED ABSTRACT: We postulated that in type 2 diabetes, the postprandial phase is a pro-inflammatory state that can be modulated by PPAR-gamma agonists. Rosiglitazone attenuated the postprandial increases of neutrophils, IL-6 and IL-8 in patients with type 2 diabetes. These effects may contribute to cardiovascular risk reduction.[1]

References

Effects of rosiglitazone on postprandial leukocytes and cytokines in type 2 diabetes. van Wijk, J.P., Cabezas, M.C., Coll, B., Joven, J., Rabelink, T.J., de Koning, E.J. Atherosclerosis (2006) [Pubmed]

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