Abstract：
:Triglyceride-rich postprandial lipoproteins are known to activate endothelial cells in vitro, contributing to atherosclerosis. Endothelial microparticles (EMP) are membranous vesicles released into the circulation from vascular endothelial cells that permit cell activation to be monitored in vivo. The objective of the study was to examine changes in EMP following a high fat meal, consumed with and without prior exercise. Eight recreationally active young men underwent two oral fat tolerance tests following either 100 min exercise at 70% VO(2)peak (EX trial) or no exercise (CON trial) on the previous evening. Postprandial triglycerides were reduced (1.97 +/- 0.31 vs. 1.17 +/- 0.13 mmol L(-1), p < 0.05) and HDL-cholesterol (HDL-C) increased (1.20 +/- 0.07 vs. 1.30 +/- 0.08 mmol L(-1), p < 0.05) in the EX compared to CON trial. EMP (CD31+/42b-) increased postprandially (p < 0.05). However, counts were not different between trials (postprandial CON and EX trial counts x 10(3 )microL(-1), 3.10 +/- 0.14 vs. 3.26 +/- 0.37). There were no changes in sICAM-1 or sVCAM-1 postprandially and no differences between trials. Interleukin-6 (IL-6) and leukocytes increased postprandially (p < 0.05). IL-6 values were not different between trials. Leukocytes were higher at 0 h in the EX trial with CON and EX trial values similar at 6 h. EMP, but not sICAM-1 or sVCAM-1, increase in response to a high fat meal. However, EMP are not attenuated by acute exercise, despite a considerable reduction in postprandial lipemia and an increase in HDL-C.
journal_name
Eur J Appl Physioljournal_title
European journal of applied physiologyauthors
Harrison M,Murphy RP,O'Connor PL,O'Gorman DJ,McCaffrey N,Cummins PM,Moyna NMdoi
10.1007/s00421-009-1050-5subject
Has Abstractpub_date
2009-07-01 00:00:00pages
555-62issue
4eissn
1439-6319issn
1439-6327journal_volume
106pub_type
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