Abstract

The long term objectives of this proposal are unified by the overriding hypothesis that the occurrence of postflight orthostatic hypotension in some, but not all, astronauts is contributed to by gender-related differences in autonomic regulation of arterial pressure which precipitates orthostatic hypotension in predisposed individuals. The purpose of this study is to test the hypothesis that greater orthostatic intolerance in women is caused by diminished vasoconstrictive responses that are estrogen related. A ground based study will include pre menopausal women at different phases of their menstrual cycle; postmenopausal women before and after estrogen replacement; and men. All groups will undergo an upright tilt test before and after cardiac blockade to test the relative susceptibilities of those who are primarily heart rate responders and those who are primarily vascular responders. Levels of estrogen, catecholamine responses, and alphaadrenergic receptors will be measured as well as cardiovascular responses. To date, studies have been completed in four men and three menopausal women.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
5M01RR000073-36
Application #
6276424
Study Section
Project Start
1997-12-01
Project End
1998-11-30
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
36
Fiscal Year
1998
Total Cost
Indirect Cost

  Institution

Name
University of Texas Medical Br Galveston
Department
Type
DUNS #
041367053
City
Galveston
State
TX
Country
United States
Zip Code
77555

  Publications

Gelman, Benjamin B; Endsley, Janice; Kolson, Dennis (2018) When do models of NeuroAIDS faithfully imitate ""the real thing""? J Neurovirol 24:146-155
Mourtakos, S P; Tambalis, K D; Panagiotakos, D B et al. (2017) Association between gestational weight gain and risk of obesity in preadolescence: a longitudinal study (1997-2007) of 5125 children in Greece. J Hum Nutr Diet 30:51-58
Ramanujam, V-M S; Nayeem, Fatima; Anderson, Karl E et al. (2017) Riboflavin as an independent and accurate biomarker for adherence in a randomized double-blind and placebo-controlled clinical trial. Biomarkers 22:508-516
Laffer, Cheryl L; Scott 3rd, Robert C; Titze, Jens M et al. (2016) Hemodynamics and Salt-and-Water Balance Link Sodium Storage and Vascular Dysfunction in Salt-Sensitive Subjects. Hypertension 68:195-203
Hosoki, Koa; Ying, Sun; Corrigan, Christopher et al. (2015) Analysis of a Panel of 48 Cytokines in BAL Fluids Specifically Identifies IL-8 Levels as the Only Cytokine that Distinguishes Controlled Asthma from Uncontrolled Asthma, and Correlates Inversely with FEV1. PLoS One 10:e0126035
Murai, Hiroki; Okazaki, Shintaro; Hayashi, Hisako et al. (2015) Alternaria extract activates autophagy that induces IL-18 release from airway epithelial cells. Biochem Biophys Res Commun 464:969-974
Diaz, Eva C; Herndon, David N; Porter, Craig et al. (2015) Effects of pharmacological interventions on muscle protein synthesis and breakdown in recovery from burns. Burns 41:649-57
Tuvdendorj, Demidmaa; Chinkes, David L; Bahadorani, John et al. (2014) Comparison of bolus injection and constant infusion methods for measuring muscle protein fractional synthesis rate in humans. Metabolism 63:1562-7
Sallam, Hanaa S; McNearney, Terry A; Chen, Jiande D Z (2014) Acupuncture-based modalities: novel alternative approaches in the treatment of gastrointestinal dysmotility in patients with systemic sclerosis. Explore (NY) 10:44-52
Petersen, John R; Stevenson, Heather L; Kasturi, Krishna S et al. (2014) Evaluation of the aspartate aminotransferase/platelet ratio index and enhanced liver fibrosis tests to detect significant fibrosis due to chronic hepatitis C. J Clin Gastroenterol 48:370-6

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