Blood Brain Flow and Exercise

Summary

Cerebral vasodilator responses to CO2 will be measured in young healthy adults, healthy sedentary older adults, and healthy exercise trained older adults. This variable will be examined before and after administering the cyclooxygenase inhibitor indomethacin, which has been shown to blunt cerebral vasodilator responses. In addition, the investigators will examine these counter-regulatory hemodynamic mechanisms to hypoperfusion caused by indomethacin.

Timeline

Start

2016-06

Primary completion

2019-04

Completion

2019-04

Publications

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• Background Baker LD, Frank LL, Foster-Schubert K, Green PS, Wilkinson CW, McTiernan A, Cholerton BA, Plymate SR, Fishel MA, Watson GS, Duncan GE, Mehta PD, Craft S. Aerobic exercise improves cognition for older adults with glucose intolerance, a risk factor for Alzheimer's disease. J Alzheimers Dis. 2010;22(2):569-79. doi: 10.3233/JAD-2010-100768.
• Background Lautenschlager NT, Cox KL, Flicker L, Foster JK, van Bockxmeer FM, Xiao J, Greenop KR, Almeida OP. Effect of physical activity on cognitive function in older adults at risk for Alzheimer disease: a randomized trial. JAMA. 2008 Sep 3;300(9):1027-37. doi: 10.1001/jama.300.9.1027.
• Background Galetta F, Franzoni F, Plantinga Y, Ghiadoni L, Rossi M, Prattichizzo F, Carpi A, Taddei S, Santoro G. Ambulatory blood pressure monitoring and endothelium-dependent vasodilation in the elderly athletes. Biomed Pharmacother. 2006 Sep;60(8):443-7. doi: 10.1016/j.biopha.2006.07.013. Epub 2006 Aug 2.
• Background Franzoni F, Ghiadoni L, Galetta F, Plantinga Y, Lubrano V, Huang Y, Salvetti G, Regoli F, Taddei S, Santoro G, Salvetti A. Physical activity, plasma antioxidant capacity, and endothelium-dependent vasodilation in young and older men. Am J Hypertens. 2005 Apr;18(4 Pt 1):510-6. doi: 10.1016/j.amjhyper.2004.11.006.
• Background Green DJ, O'Driscoll G, Joyner MJ, Cable NT. Exercise and cardiovascular risk reduction: time to update the rationale for exercise? J Appl Physiol (1985). 2008 Aug;105(2):766-8. doi: 10.1152/japplphysiol.01028.2007. Epub 2008 Jan 3. No abstract available.
• Background Seifert T, Brassard P, Wissenberg M, Rasmussen P, Nordby P, Stallknecht B, Adser H, Jakobsen AH, Pilegaard H, Nielsen HB, Secher NH. Endurance training enhances BDNF release from the human brain. Am J Physiol Regul Integr Comp Physiol. 2010 Feb;298(2):R372-7. doi: 10.1152/ajpregu.00525.2009. Epub 2009 Nov 18.
• Background Serrador JM, Picot PA, Rutt BK, Shoemaker JK, Bondar RL. MRI measures of middle cerebral artery diameter in conscious humans during simulated orthostasis. Stroke. 2000 Jul;31(7):1672-8. doi: 10.1161/01.str.31.7.1672.
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• Background Lucas SJ, Ainslie PN, Murrell CJ, Thomas KN, Franz EA, Cotter JD. Effect of age on exercise-induced alterations in cognitive executive function: relationship to cerebral perfusion. Exp Gerontol. 2012 Aug;47(8):541-51. doi: 10.1016/j.exger.2011.12.002. Epub 2012 Jan 2.
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• Background Frauenfelder BA, Schuepbach D, Baumgartner RW, Hell D. Specific alterations of cerebral hemodynamics during a planning task: a transcranial Doppler sonography study. Neuroimage. 2004 Jul;22(3):1223-30. doi: 10.1016/j.neuroimage.2004.03.008.
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• Background Jensen K, Kjaergaard S, Malte E, Bunemann L, Therkelsen K, Knudsen F. Effect of graduated intravenous and standard rectal doses of indomethacin on cerebral blood flow in healthy volunteers. J Neurosurg Anesthesiol. 1996 Apr;8(2):111-6. doi: 10.1097/00008506-199604000-00002.
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Drugs

Indications