title: Endothelial and inflammatory responses to acute exercise in perimenopausal and late postmenopausal women.
abstract: Endothelial dysfunction and inflammation are characteristics of subclinical atherosclerosis and may increase through progressive menopausal stages. Evaluating endothelial responses to acute exercise can reveal underlying dysfunction not apparent in resting conditions. The purpose of this study was to investigate markers of endothelial function and inflammation before and after acute exercise in healthy low-active perimenopausal (PERI) and late postmenopausal (POST) women. Flow-mediated dilation (FMD), CD31+/CD42b-and CD62E+endothelial microparticles (EMPs), and the circulating inflammatory factors monocyte chemoattractant protein 1 (MCP-1), interleukin 8 (IL-8), and tumor necrosis factor-α (TNF-α) were measured before and 30 min after acute exercise. Before exercise, FMD was not different between groups (PERI: 6.4 ± 0.9% vs. POST: 6.5 ± 0.8%, P = 0.97); however, after acute exercise PERI tended to improve FMD (8.5 ± 0.9%, P = 0.09), whereas POST did not (6.2 ± 0.8%, P = 0.77). Independent of exercise, we observed transient endothelial dysfunction in POST with repeated FMD measures. There was a group × exercise interaction for CD31+/CD42b-EMPs (P = 0.04), where CD31+/CD42b-EMPs were similar before exercise (PERI: 57.0 ± 6.7 EMPs/μl vs. POST: 58.5 ± 5.3 EMPs/μl, P = 0.86) but were higher in POST following exercise (PERI: 48.2 ± 6.7 EMPs/μl vs. POST: 69.4 ± 5.3 EMPs/μl, P = 0.023). CD62E+EMPs were lower in PERI compared with POST before exercise (P < 0.001) and increased in PERI (P = 0.04) but did not change in POST (P = 0.68) in response to acute exercise. After acute exercise, MCP-1 (P = 0.055), TNF-α (P = 0.02), and IL-8 (P < 0.001) were lower in PERI but only IL-8 decreased in POST (P < 0.001). Overall, these data suggest that perimenopausal and late postmenopausal women display different endothelial and inflammatory responses to acute exercise.
authors.affiliation: Department of Kinesiology, University of Massachusetts Amherst, Amherst, Massachusetts.
authors.forename: Corinna
authors.initials: C
authors.lastname: Serviente
authors.affiliation: Department of Nutrition, University of Massachusetts Amherst, Amherst, Massachusetts; and.
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Troy
authors.affiliation: Department of Kinesiology, University of Massachusetts Amherst, Amherst, Massachusetts.
authors.forename: Maxine
authors.initials: M
authors.lastname: de Jonge
authors.affiliation: Department of Kinesiology, University of Georgia, Athens, Georgia.
authors.forename: Daniel D
authors.initials: DD
authors.lastname: Shill
authors.affiliation: Department of Kinesiology, University of Georgia, Athens, Georgia.
authors.forename: Nathan T
authors.initials: NT
authors.lastname: Jenkins
authors.affiliation: Department of Kinesiology, University of Massachusetts Amherst, Amherst, Massachusetts; switkows@kin.umass.edu.
authors.forename: Sarah
authors.initials: S
authors.lastname: Witkowski
mesh_terms: D016207:Cytokines / Q000276:immunology*; D004730:Endothelium, Vascular / Q000276:immunology*; D015444:Exercise; D005260:Female; D006801:Humans; D007249:Inflammation / Q000276:immunology*; D018836:Inflammation Mediators / Q000276:immunology; D008875:Middle Aged; D047648:Perimenopause / Q000276:immunology*; D017698:Postmenopause / Q000276:immunology*
chemical_list: D016207:Cytokines; D018836:Inflammation Mediators
keywords: acute exercise; endothelial function; inflammation; menopause