During his Lakeside Hospital internship, Zamecnik became interested in how cells regulate growth, and hence, in
protein chemistry. He was awarded a Finney-Howell Fellowship and a Moseley Traveling Fellowship to go to the
Carlsberg Laboratory in Copenhagen where he worked with Dr.
Kai Linderstrom-Lang. His planned time in Copenhagen was cut short because of
World War II—the Germans occupied Denmark from April 1940. He returned to Boston where he became an assistant physician at the Huntington Memorial Hospital, studying the toxic factors involved in
traumatic shock for a wartime
Office of Scientific Research and Development project led by Huntington director
Joseph Charles Aub. After a year in New York at the
Rockefeller Institute for Medical Research studying protein synthesis with
Max Bergmann, he join the faculty of medicine at Harvard Medical School in 1942, becoming an instructor and then professor of medicine, where he served until retiring as the Collis P. Huntington Professor of Oncologic Medicine, Emeritus in 1979. After retiring from Harvard Medical School, he continued his research at the
Worcester Foundation for Biomedical Research with Hoagland. When the foundation merged with the
University of Massachusetts Medical School in 1997, Zamecnik moved his laboratory to MGH, where he continued to work until several weeks before his death. Paul Zamecnik is generally regarded as the founder of
antisense therapy. Zamecnik authored or co-authored 210 peer-reviewed scientific articles. He won many distinguished awards, including the
National Cancer Society National Award in 1968,
National Medal of Science in 1991, and the first-ever
Lasker Lifetime Achievement Award in 1996. Zamecnik was also a member of the U.S.
National Academy of Sciences,
American Academy of Arts and Sciences,
American Society of Biological Chemistry,
American Association for Cancer Research (President 1964–1965),
Association of American Physicians,
Royal Danish Academy of Sciences and Letters and the
American Philosophical Society. == Personal life ==