Abstract

The central hypothesis of this proposal is that active skeletal muscle blood flow during large muscle dynamic exercise is reduced as a function of age in humans. Specifically, we hypothesize that leg muscle vasodilation during exercise at any submaximal workload is reduced with advancing age in men and women (vs. younger control subjects) (Specific Aim 1) and that this is due to increasing competition for cardiac output by the aging respiratory muscles (Specific Aim 2), augmented sympathetic vasoconstriction in the active leg muscles (Specific Aim 3), and impaired endothelial-dependent vasodilation (Specific Aim 4). A critical requirement for evaluating these hypotheses is our ability to combine measurements of cardiac output and leg blood flow during large muscle dynamic exercise, with physiological and pharmacological evaluation of vascular responsiveness in the leg.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
2M01RR000585-29
Application #
6409674
Study Section
National Center for Research Resources Initial Review Group (RIRG)
Project Start
1976-12-01
Project End
2004-11-30
Budget Start
Budget End
Support Year
29
Fiscal Year
2000
Total Cost
Indirect Cost

  Institution

Name
Mayo Clinic, Rochester
Department
Type
DUNS #
City
Rochester
State
MN
Country
United States
Zip Code
55905

  Publications

Yu, Alan S L; Shen, Chengli; Landsittel, Douglas P et al. (2018) Baseline total kidney volume and the rate of kidney growth are associated with chronic kidney disease progression in Autosomal Dominant Polycystic Kidney Disease. Kidney Int 93:691-699
Kamimura, Daisuke; Suzuki, Takeki; Wang, Wanmei et al. (2018) Higher plasma leptin levels are associated with reduced left ventricular mass and left ventricular diastolic stiffness in black women: insights from the Genetic Epidemiology Network of Arteriopathy (GENOA) study. Hypertens Res 41:629-638
Nowak, Kristen L; You, Zhiying; Gitomer, Berenice et al. (2018) Overweight and Obesity Are Predictors of Progression in Early Autosomal Dominant Polycystic Kidney Disease. J Am Soc Nephrol 29:571-578
Tirumanisetty, P; Prichard, D; Fletcher, J G et al. (2018) Normal values for assessment of anal sphincter morphology, anorectal motion, and pelvic organ prolapse with MRI in healthy women. Neurogastroenterol Motil 30:e13314
McKenzie, Katelyn A; El Ters, Mirelle; Torres, Vicente E et al. (2018) Relationship between caffeine intake and autosomal dominant polycystic kidney disease progression: a retrospective analysis using the CRISP cohort. BMC Nephrol 19:378
Dad, Taimur; Abebe, Kaleab Z; Bae, K Ty et al. (2018) Longitudinal Assessment of Left Ventricular Mass in Autosomal Dominant Polycystic Kidney Disease. Kidney Int Rep 3:619-624
West, Nancy A; Lirette, Seth T; Cannon, Victoria A et al. (2017) Adiposity, Change in Adiposity, and Cognitive Decline in Mid- and Late Life. J Am Geriatr Soc 65:1282-1288
Lu, Jin; Varghese, Ron T; Zhou, Lianzhen et al. (2017) Glucose tolerance and free fatty acid metabolism in adults with variations in TCF7L2 rs7903146. Metabolism 68:55-63
Shen, Chengli; Landsittel, Douglas; Irazabal, María V et al. (2017) Performance of the CKD-EPI Equation to Estimate GFR in a Longitudinal Study of Autosomal Dominant Polycystic Kidney Disease. Am J Kidney Dis 69:482-484
Kline, Timothy L; Korfiatis, Panagiotis; Edwards, Marie E et al. (2017) Image texture features predict renal function decline in patients with autosomal dominant polycystic kidney disease. Kidney Int 92:1206-1216

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