Can statin treatment cut cardiovascular risk in HIV-infected patients?
Mass. General-led study will test preventive effects and investigate underlying mechanisms
27-Oct-2014 - A nationwide study based at Massachusetts General Hospital (MGH) will investigate, for the first time, whether treatment with a statin drug can reduce the elevated risk of cardiovascular disease
in individuals infected with the human immunodeficiency virus (HIV). The REPRIEVE (Randomized Study to Prevent Vascular Events in HIV)
trial is funded by the National Heart, Lung, and Blood Institute (NHLBI) and will be conducted in collaboration with the AIDS
Clinical Trials Group, funded by the National Institute of Allergy and Infectious Diseases (NIAID). MGH will receive more
than $39 million in direct support of the trial. Kowa Pharmaceuticals America, Inc, will provide the study drug and
additional study funds.
The 6-year trial will enroll 6,500 participants at up to 100 sites primarily in North America. Steven Grinspoon, MD, and
Udo Hoffmann MD, MPH, are leading the study at MGH as principal investigators of the Clinical and Data Coordinating Centers, respectively.
"The risks of heart attack and stroke in HIV-infected individuals are from 50 to 100 percent higher than they are in
uninfected people, and while some of these patients have traditional cardiovascular risk factors, recent studies suggest that HIV
infection itself confers a unique set of risks, including immune system activation and arterial inflammation," says Grinspoon,
who is director of the MGH Program in Nutritional Metabolism and a professor of Medicine at Harvard Medical School. "Those
findings contributed to the hypothesis that statin therapy - which reduces inflammation and immune activation, as well
as lipid levels - may be particularly well tailored to reducing that cardiovascular risk."
Over the past decade, studies published by Grinspoon and his MGH research team were among the first to identify
factors - including increased asymptomatic atherosclerosis and elevated markers of immune activation - that contribute to
the increased cardiovascular risk among HIV-infected patients. Using CT angiography, they found that coronary artery
plaques in people infected with HIV were more likely to have features indicating an increased vulnerability to
rupture, resulting in a clot that would block the artery and cause a heart attack. The current study will
test whether a daily dose of pitavastatin - a drug shown to reduce low-density lipoprotein cholesterol
in HIV patients without interacting with antiretroviral therapy drugs - can safely reduce the
incidence of heart attack, stroke and other adverse cardiovascular events.
Study participants - HIV-infected men and women ages 40 to 75 who are on antiretroviral therapy and have no known
cardiovascular disease and low traditional risk factors - will be randomized to receive either pitavastatin or a placebo for
up to 72 months. Within the larger group of 6,500 participants, 800 will also receive detailed assessments of the impact
of pitavastatin treatment on characteristics of arterial plaques and on biomarkers of inflammation in order to
identify the mechanisms behind the effects of statin therapy.
"Understanding the structural changes that statins induce in the atherosclerotic plaques of HIV-infected patients and
confirming the role of increased inflammation in triggering plaque rupture would add important justification for preventive statin
therapy," says Hoffmann, who is chief of the Division of Cardiothoracic Imaging in the MGH Department of Radiology and a
professor of Radiology at Harvard Medical School. "If our hypothesis is true, we will know why statin therapy could
prevent major cardiovascular events in these patients, even when they do not have elevated lipid levels and other
classical indications for statin therapy." Over the past decade Hoffmann's MGH group has pioneered the
assessment of high-risk coronary atherosclerosis with CT angiography and has demonstrated its
relationship to cardiovascular events in non-HIV-infected patients.
Grinspoon adds, "REPRIEVE will be among the largest randomized clinical trials conducted in the HIV population and the first
study designed to investigate a large-scale cardiovascular disease prevention strategy in these patients. By addressing the critical
question of statin efficacy in this group of patients, the study should provide important information as to efficacy and safety
of this strategy for primary cardiovascular disease prevention in this population."
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In addition to Grinspoon and Hoffmann of the MGH, trial leadership includes co-principal investigators Pamela Douglas, MD, professor of Medicine at Duke University, and Heather Ribaudo, PhD, senior biostatistician at the Harvard School of Public Health. Enrollment in the REPRIEVE trial is anticipated to begin in the Spring of 2015. Additional information is available at http://www.reprievetrial.org.
The study is being funded through NHLBI grants U01HL123336 (Clinical Coordinating Center) and U01HL123339 (Data Coordinating Center). The AIDS Clinical Trials Group is funded through NIAID grants UM1 AI068636, UM1 AI106701, and UM1 AI068634.
Massachusetts General Hospital, founded in 1811, is the original and largest teaching hospital of Harvard Medical School. The MGH conducts the largest hospital-based research program in the United States, with an annual research budget of more than $785 million and major research centers in HIV/AIDS, cardiovascular research, cancer, computational and integrative biology, cutaneous biology, human genetics, medical imaging, neurodegenerative disorders, regenerative medicine, reproductive biology, systems biology, transplantation biology and photomedicine.
Contact:
Cassandra Aviles
cmaviles@partners.org
617-724-6433
Massachusetts General Hospital
@MassGeneralNews
Source: http://www.eurekalert.org/pub_releases/2014-10/mgh-cst102714.php
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