Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
OBSERVATIONAL
1992-04-30
1997-03-31
Brief Summary
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Detailed Description
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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.
Conditions
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Eligibility Criteria
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Inclusion Criteria
100 Years
MALE
No
Sponsors
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National Heart, Lung, and Blood Institute (NHLBI)
NIH
References
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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. doi: 10.1161/01.hyp.27.6.1210.
Other Identifiers
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4361
Identifier Type: -
Identifier Source: org_study_id
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