Opioid Compromise in Hypertension--Modulating Factors

Hypertension Clinical Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00005434
• Other study ID #: 4361
• Secondary ID: R29HL046218
• Status: Completed
• Phase: N/A
• First received: May 25, 2000
• Last updated: February 17, 2016
• Start date: April 1992
• Est. completion date: March 1997

Study information

• Verified date: May 2000
• Source: National Heart, Lung, and Blood Institute (NHLBI)
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Federal Government
• Study type: Observational

Clinical Trial Summary

To confirm the preliminary findings of age, race, and hypertension chronicity effects on opioid and cardiovascular responses to stress and to determine the opioid mechanisms mediating these effects using an opioid receptor blockade strategy.

Description:

BACKGROUND:

Opioids exert depressor effects on cardiovascular responses through sympathetic nervous system inhibition. Research suggests that opioid inhibition of sympathetic activity may be compromised in hypertension. Preliminary studies by the Principal Investigator suggest that the nature of this compromise may be influenced by age and race. Additionally, literature suggests that hypertension chronicity may modulate opioid sympathoinhibitory actions. The receptor mechanisms mediating the observed modulating effects of age, race, and hypertension chronicity on opioidergic inhibition and regulation of blood pressure remained to be determined.

DESIGN NARRATIVE:

Two double-blind, placebo-controlled cross-over studies were conducted to evaluate the effects of naltrexone hydrochloride, an oral opiate antagonist, on adrenergically-mediated cardiovascular responses in older and younger, Black and White normotensives and hypertensives with varying lengths of hypertension duration. Cardiovascular and opioid responses were measured in response to a stressor combined with either placebo or naltrexone pretreatment. Results from these studies assisted in (a) elucidating opioidergic mechanisms underlying the increased rates of hypertension morbidity and mortality among Blacks and the elderly, and (b) ultimately optimized the design of pharmacological interventions for the prevention and treatment of hypertension.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 0
• Est. completion date: March 1997
• Accepts healthy volunteers: No
• Gender: Male
• Age group: N/A to 100 Years
• Eligibility: No eligibility criteria

Study Design

N/A

Related Conditions & MeSH terms

• Cardiovascular Diseases
• Heart Diseases
• Hypertension

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
National Heart, Lung, and Blood Institute (NHLBI)

References & Publications (1)

Svetkey LP, Timmons PZ, Emovon O, Anderson NB, Preis L, Chen YT. Association of hypertension with beta2- and alpha2c10-adrenergic receptor genotype. Hypertension. 1996 Jun;27(6):1210-5. — View Citation