George A. Stouffer

Learn More
OBJECTIVE Age-related aortic stiffness is an independent risk factor for cardiovascular diseases. Although oxidative stress is implicated in aortic stiffness, the underlying molecular mechanisms remain unelucidated. Here, we examined the source of oxidative stress in aging and its effect on smooth muscle cell (SMC) function and aortic compliance using(More)
Many elements contribute to congestive heart failure: changes in perfusion, hemodynamic stresses, alterations in calcium metabolism, and dysregulation of cell signaling pathways. Intervention in these processes forms the basis for current heart failure therapies. Nevertheless, heart failure is primarily a disease of wear and tear; despite everything we know(More)
AIM High-density lipoproteins (HDLs) have several potentially protective vascular effects. Most clinical studies of therapies targeting HDL have failed to show benefits vs. placebo. OBJECTIVE To investigate the effects of an HDL-mimetic agent on atherosclerosis by intravascular ultrasonography (IVUS) and quantitative coronary angiography (QCA). DESIGN(More)
Transforming growth factor-beta 1 (TGF-beta 1) has been implicated in mediating smooth muscle cell (SMC) growth after vascular injury. Studies examining TGF-beta-induced growth of cultured SMC have identified only modest mitogenic effects which are largely dependent on autocrine production of platelet-derived growth factor-AA (PDGF-AA). Recent studies have(More)
Angiotensin II (Ang II) has been implicated in the regulation of smooth muscle cell proliferation after vascular injury, but the molecular mechanisms of this effect remain obscure. The aims of the present study were 1) to determine if Ang II was mitogenic (in a defined serum-free medium) for aortic smooth muscle cells derived from spontaneously hypertensive(More)
Angiotensin II (Ang II) has been implicated in the regulation of smooth muscle cell proliferation after vascular injury, but the molecular mechanisms of this effect remain obscure. The aims of the present study were 1) to determine if Ang II was mitogenic (in a defined serum-free medium) for aortic smooth muscle cells derived from spontaneously hypertensive(More)
BACKGROUND Individuals of African descent in the United States suffer disproportionately from diseases with a metabolic etiology (obesity, metabolic syndrome, and diabetes), and from the pathological consequences of these disorders (hypertension and cardiovascular disease). METHODOLOGY/PRINCIPAL FINDINGS Using a combination of genetic/genomic and(More)
BACKGROUND Strong epidemiologic evidence correlates tobacco use with a variety of serious adverse health effects, but the biological mechanisms that produce these effects remain elusive. RESULTS We analyzed gene transcription data to identify expression spectra related to tobacco use in circulating leukocytes of 67 Caucasian male subjects. Levels of(More)
BACKGROUND Major advances have been made in the treatment of ST-elevation myocardial infarction (STEMI) in outpatients. In contrast, little is known about outcomes in STEMI that occur in patients hospitalized for a noncardiac condition. METHODS AND RESULTS This was a retrospective, single-center study of inpatient STEMIs from January 1, 2007, to July 31,(More)
CONTEXT Adverse cardiac events have been reported in patients waiting for either coronary surgery or angioplasty. However, data on the risk of adverse events while awaiting coronary angiography are limited, and none are available from a US population. OBJECTIVE To quantify cardiac outcomes in patients waiting for elective coronary angiography. DESIGN,(More)