Advertisement

Topics

Racial Differences in Control of Blood Vessel Tone and Blood Flow

2014-08-27 03:59:26 | BioPortfolio

Summary

Black Americans tend to die more often from and have more diseases associated with heart disease than White Americans. The exact cause of this is unknown, but it is likely a combination of genetics, behavior, risk factors, strategies for education and prevention, and socioeconomic factors.

Recent studies have suggested that faster biological processes in blood vessels of Black Americans may be the cause of increased amounts of heart disease. In addition, small blood vessels in Black Americans seem to be less responsive to substances that relax blood vessels, which may explain increased blood pressure levels.

In this study researchers plan to study artery relaxation (dilation) in response substances affecting the cells lining blood vessels (endothelin). Researchers will compare the results of this study in black and white people to find out whether racial differences may contribute to increases in heart disease and heart related deaths in blacks.

Description

Black Americans have a greater morbidity and mortality related to cardiovascular diseases compared to whites. The cause for this phenomenon is probably multifactorial and includes differences in pathogenesis, risk factor patterns, genetic background, behavioral variables, strategies for education and prevention, and socioeconomic factors. Recent evidence suggests that acceleration of some of the processes related to vascular biology may account for the greater prevalence of cardiovascular disease in blacks. A diminished vasodilator response of the microvasculature has been shown in African Americans and may therefore be responsible for their increased prevalence of hypertension. Endothelial dysfunction is a central mechanism in the development of atherosclerosis. It is therefore reasonable to postulate that endothelial dysfunction of large conductance arteries may also contribute to a greater susceptibility to atherosclerosis in blacks compared to whites, even in those individuals without the known risk factors for coronary heart disease. In the present study, we propose to investigate brachial artery dilation in response to endothelium-dependent and -independent stimuli in black and white individuals to determine whether racial differences in the vascular biology of large conductance vessels that might contribute to the greater cardiovascular morbidity and mortality previously reported in blacks.

Study Design

N/A

Conditions

Atherosclerosis

Location

National Heart, Lung and Blood Institute (NHLBI)
Bethesda
Maryland
United States
20892

Status

Completed

Source

National Institutes of Health Clinical Center (CC)

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:59:26-0400

Clinical Trials [251 Associated Clinical Trials listed on BioPortfolio]

Epidemiology of Carotid IMT Progression in MESA - Ancillary Study

To determine the factors associated with progression of sub-clinical atherosclerosis and to evaluate the associations between the progression of sub-clinical atherosclerosis and the develo...

Vaccine Against Atherosclerosis in Patients With Overweight Problems or Obesity

Atherosclerosis vaccine, V6, has been through two small-scale Phase II open label clinical trials. It has shown significant improvement in lipid profile in patients with overweight or obes...

Gene-by-Smoking Interactions and Risk of Atherosclerosis - Ancillary to ARIC

To evaluate common genetic variations, that in combination with exposure to tobacco smoke, may modify the risk of atherosclerosis.

Epidemiology of Plasma Fatty Acids and Atherosclerosis

To measure by gas-liquid chromatography the relative concentrations of all saturated and unsaturated fatty acids found in the cholesterol ester and phospholipid fractions of plasma from 4,...

EPAT: Estrogen in the Prevention of Atherosclerosis Trial

The purpose of this study is to determine the effects of estrogen replacement therapy (ERT) on the progression of early atherosclerosis in healthy postmenopausal women without preexisting ...

PubMed Articles [804 Associated PubMed Articles listed on BioPortfolio]

Matrix metalloproteinase-10 deficiency delays atherosclerosis progression and plaque calcification.

Matrix metalloproteinases (MMPs) have been implicated in atherosclerosis and vascular calcification. Among them, we reported that MMP10 is present in human atheroma, associated with atherosclerosis. H...

Progranulin in the hematopoietic compartment protects mice from atherosclerosis.

Progranulin is a circulating protein that modulates inflammation and is found in atherosclerotic lesions. Here we determined whether inflammatory cell-derived progranulin impacts atherosclerosis devel...

Disruption of a CD1d-mediated interaction between mast cells and NKT cells aggravates atherosclerosis.

The development of atherosclerosis is tightly regulated by the innate and adaptive immune system. Communication between these two compartments occurs, among others, upon presentation of lipid antigens...

Anti-tumor necrosis factor-α therapy increases plaque burden in a mouse model of experimental atherosclerosis.

Atherosclerosis is critically fueled by vascular inflammation through oxidized lipids and inflammatory cytokines such as tumor necrosis factor (TNF)-α. Genetic disruption of Tnf-α reduces atheroscle...

Examining the Role of and Treatment Directed at IL-1β in Atherosclerosis.

The purpose of this review was to examine the role of IL-1β in the inflammatory process central to the development of atherosclerosis and to discuss current clinical evidence for treatments targeting...

Medical and Biotech [MESH] Definitions

Lack of perfusion in the EXTREMITIES resulting from atherosclerosis. It is characterized by INTERMITTENT CLAUDICATION, and an ANKLE BRACHIAL INDEX of 0.9 or less.

Complete blockage of blood flow through one of the CORONARY ARTERIES, usually from CORONARY ATHEROSCLEROSIS.

A drug that has been given by mouth in the treatment of atherosclerosis and other vascular disorders, hyperlipidemias, and thrombo-embolic disorders. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1408)

Strains of mice that contain genetic disruptions (knockout) of APOLIPOPROTEINS E genes. They are used as models for ATHEROSCLEROSIS research.

A measurement of the thickness of the carotid artery walls. It is measured by B-mode ULTRASONOGRAPHY and is used as a surrogate marker for ATHEROSCLEROSIS.

More From BioPortfolio on "Racial Differences in Control of Blood Vessel Tone and Blood Flow"

Advertisement
Quick Search
Advertisement
Advertisement

 

Relevant Topics

Cardiology
Cardiology is a specialty of internal medicine.  Cardiac electrophysiology : Study of the electrical properties and conduction diseases of the heart. Echocardiography : The use of ultrasound to study the mechanical function/physics of the h...

Biological Therapy
Biological therapy involves the use of living organisms, substances derived from living organisms, or laboratory-produced versions of such substances to treat disease. Some biological therapies for cancer use vaccines or bacteria to stimulate the body&rs...


Searches Linking to this Trial