Vascular Dysfunction in Black Individuals: Roles of Nitric Oxide and Endothelin-1

Summary

The research aims of this proposal are: * Specific Aim 1: To test whether an increase in nitric oxide signaling can increase vasodilator responses in young Black individuals. * Specific Aim 2: To test whether a decrease in endothelin-1 signaling can increase vasodilator responses in young Black individuals.

Timeline

Start

2021-05-27

Primary completion

2021-09-20

Completion

2021-09-20

Outcome

Outcome not reported

Stopped: “Despite significant effort, we were unable to obtain the supply of drugs and supplements needed for the various arms of this Clinical Trial.”

Publications

• Background Barbosa TC, Young BE, Stephens BY, Nandadeva D, Kaur J, Keller DM, Fadel PJ. Functional sympatholysis is preserved in healthy young Black men during rhythmic handgrip exercise. Am J Physiol Regul Integr Comp Physiol. 2020 Sep 1;319(3):R323-R328. doi: 10.1152/ajpregu.00105.2020. Epub 2020 Aug 12.
• Background Barbosa TC, Kaur J, Stephens BY, Akins JD, Keller DM, Brothers RM, Fadel PJ. Attenuated forearm vascular conductance responses to rhythmic handgrip in young African-American compared with Caucasian-American men. Am J Physiol Heart Circ Physiol. 2018 Nov 1;315(5):H1316-H1321. doi: 10.1152/ajpheart.00387.2018. Epub 2018 Aug 17.
• Background Kaur J, Barbosa TC, Nandadeva D, Young BE, Stephens BY, Brothers RM, Fadel PJ. Attenuated Rapid-Onset Vasodilation to Forearm Muscle Contraction in Black Men. Med Sci Sports Exerc. 2021 Mar 1;53(3):590-596. doi: 10.1249/MSS.0000000000002511.
• Background Young BE, Kaur J, Vranish JR, Stephens BY, Barbosa TC, Cloud JN, Wang J, Keller DM, Fadel PJ. Augmented resting beat-to-beat blood pressure variability in young, healthy, non-Hispanic black men. Exp Physiol. 2020 Jul;105(7):1102-1110. doi: 10.1113/EP088535. Epub 2020 May 27.
• Background Vranish JR, Holwerda SW, Young BE, Credeur DP, Patik JC, Barbosa TC, Keller DM, Fadel PJ. Exaggerated Vasoconstriction to Spontaneous Bursts of Muscle Sympathetic Nerve Activity in Healthy Young Black Men. Hypertension. 2018 Jan;71(1):192-198. doi: 10.1161/HYPERTENSIONAHA.117.10229. Epub 2017 Dec 4.

Drugs

Indications