PHILADELPHIA — Perelman School of Medicine professors Gideon Dreyfuss, PhD, the Isaac Norris Professor, Department of Biochemistry and Biophysics, and Beatrice H. Hahn, MD, professor of Medicine and Microbiology, along with Nancy Bonini, PhD, the Lucille B. Williams Professor of Biology in Penn's School of Arts and Sciences, have been elected members of the National Academy of Sciences, considered one of the highest honors accorded a U.S. scientist or engineer.

Selected for "their distinguished and continuing achievements in original research," the three scientists are part of the 2012 Academy class of 84 members and 21 foreign associates from 15 countries.

Dreyfuss examines how RNA and associated proteins function in degenerative diseases. Hahn studies the origins, evolution, and disease mechanisms of human and simian immunodeficiency viruses. Bonini investigates the fruit fly to identify genes that play crucial roles in human brain disease. Both Dreyfuss and Bonini are also Howard Hughes Medical Institute investigators.

For full release on all Penn winners, visit A full list of 2012 Academy Members is at

Penn Medicine is one of the world's leading academic medical centers, dedicated to the related missions of medical education, biomedical research, and excellence in patient care. Penn Medicine consists of the Raymond and Ruth Perelman School of Medicine at the University of Pennsylvania (founded in 1765 as the nation's first medical school) and the University of Pennsylvania Health System, which together form a $5.3 billion enterprise.

The Perelman School of Medicine has been ranked among the top five medical schools in the United States for the past 18 years, according to U.S. News & World Report's survey of research-oriented medical schools. The School is consistently among the nation's top recipients of funding from the National Institutes of Health, with $373 million awarded in the 2015 fiscal year.

The University of Pennsylvania Health System's patient care facilities include: The Hospital of the University of Pennsylvania and Penn Presbyterian Medical Center -- which are recognized as one of the nation's top "Honor Roll" hospitals by U.S. News & World Report -- Chester County Hospital; Lancaster General Health; Penn Wissahickon Hospice; and Pennsylvania Hospital -- the nation's first hospital, founded in 1751. Additional affiliated inpatient care facilities and services throughout the Philadelphia region include Chestnut Hill Hospital and Good Shepherd Penn Partners, a partnership between Good Shepherd Rehabilitation Network and Penn Medicine.

Penn Medicine is committed to improving lives and health through a variety of community-based programs and activities. In fiscal year 2015, Penn Medicine provided $253.3 million to benefit our community.

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