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May 29, 2003 Vol. 348 No. 22
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Enfuvirtide (T-20) is a peptide that binds to glycoprotein 41 and inhibits the entry of human immunodeficiency virus type 1 (HIV-1) into CD4+ cells. In this randomized, open-label trial, patients who were treated with enfuvirtide plus an optimized antiretroviral regimen had significantly greater reductions in viral load and greater increases in CD4+ cell counts. Eosinophilia was a common finding; bacterial pneumonia was more common in enfuvirtide-treated patients.
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This randomized study, conducted in Europe and Australia, included 335 patients in the enfuvirtide group and 169 in a control group treated with only an optimized antiretroviral regimen. All patients had previously received multiple anti-HIV regimens. At 24 weeks, there was a greater decrease in the plasma viral load and a greater increase in the CD4+ cell count in the enfuvirtide group.
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The Veterans Affairs (VA) health care system offers some invasive procedures, such as cardiac angiography, at selected hospitals. This study showed that the underuse of cardiac angiography after myocardial infarction was more common among VA patients than among Medicare fee-for-service patients. This difference was explained by the availability of cardiac catheterization on site.
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To improve the efficiency and quality of care, in 1995, the Veterans Health Administration launched a program that included increased use of information technology, performance measurement and reporting, realigned payment policies, and integration of services. After the implementation of this program, the quality of preventive, acute, and long-term care substantially improved.
Inhibitors of human immunodeficiency virus type 1 (HIV-1) enzymes are central to the treatment of HIV-1 infection, but the development of resistant viruses remains a problem. Another approach is to thwart the entry of the virus into cells by preventing the fusion of the viral envelope with the cell surface. This article reviews the way in which HIV-1 enters cells and potential means of denying the virus admission to cells.
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