Dr. Frederick Alt is currently the Director of the Program in Cellular and Molecular Medicine (formerly the Immune Disease Institute) at Boston Children’s Hospital. Dr. Alt has been Professor of Genetics at Harvard Medical School since 1991 and Charles A. Janeway Professor of Pediatrics at Boston Children’s Hospital since 1993. Prior to 1991, Dr. Alt was on the Faculty at Columbia University. He earned his Ph.D. with distinction from the Department of Biological Sciences at Stanford University in 1977. Dr. Alt is a member of the National Academy of Sciences, the Institute of Medicine of the National Academies, and a fellow of the American Academy of Arts and Sciences, the American Academy of Microbiology, and the American Association for the Advancement of Science. He is also an investigator at the Howard Hughes Medical Institute.
Dr. Alt has won numerous honors for biomedical research, including the Stanford University Medical Center Arthur Kornberg and Paul Berg Lifetime Achievement Award in Biomedical Science and the National Cancer Institute’s Alfred Knudson Award for “pioneering contributions that have revolutionized the field of cancer genetics.” Each year, the Cancer Research Institute of New York presents the Frederick W. Alt Award for New Discoveries in Cancer Immunology in his honor. Dr. Alt’s impact extends far beyond his own laboratory, for not only is he an outstanding researcher; he is also an exemplary teacher. In 2003, he received the American Association of Immunologists Excellence in Mentoring Award. Dr. Alt has mentored over 100 students and research fellows, many of whom have become leaders in immunology, genetics, or cancer biology.
For Dr. Alt, cancer research has always been a personal endeavor. During his remarks, Dr. Alt spoke of how cancer claimed the lives of both his parents when he was a young child (Fig. 2). “It did make a big impact,” said Dr. Alt, “and I wanted to become a cancer researcher.”
Drug resistance was a well-known problem in cancer treatment when Dr. Alt’s career began. His early research sought to understand how cancer cells become resistant to the drug methotrexate, and it was animated by the “somewhat heretical notion that cancer cells might be able to increase their numbers of gene copies.” At that time, in the early 1970s, conventional wisdom held that each person had exactly two copies of each gene—one copy from their mother and the other from their father—and that their genome was otherwise fixed and unchangeable.
After building the technology to probe cells for individual genes, Dr. Alt applied this technology to cancer cells that had been treated with methotrexate. “We found that cells that are very resistant have hundreds or thousands of copies of the dihydrofolate reductase gene which confers resistance,” said Dr. Alt. “When we took the cells out of the drug, they actually lost the gene copies, really showing that mammalian cancer cells could have unstable genomes. They could gain genes when they were put under selection for drug resistance, and they could lose them when it was taken away. That was really a shocking result.”
Dr. Alt’s discovery of gene amplification in chemotherapy-resistant cancer cells served to overthrow the old concept of a fixed genome, suggesting instead that cancer cells could change their genes to evolve resistance to treatments like methotrexate.
The story became even more interesting when the same pattern of amplified genes was discovered in the childhood cancer neuroblastoma. “We knew from our methotrexate resistance research what amplified genes looked like under a microscope,” said Dr. Alt, but it was not clear which gene had been amplified in these tumors. It was at this time that Dr. Alt made the connection between gene amplification and carcinogenesis. “The idea we had was that there would be a gene that actually caused the cancer—not one that would cause drug resistance, but one that made the cancer grow better,” he said. This idea built directly off the recent discovery of viral oncogenes by previous Szent-Györgyi Prize winner Dr. Peter Vogt.
Dr. Alt and his colleagues identified that the amplified gene in neuroblastoma was related to the viral oncogene myc, so they named it neuroblastoma-myc or n-myc. “That was extremely satisfying for us,” said Dr. Alt, “because it showed that for gene amplification it was not only a mechanism by which cancer cells become drug-resistant but also a mechanism by which they get generated.” Today, genomic instability is recognized as one of the hallmarks of cancer.
Equally important to cancer research has been Dr. Alt’s work on the critical DNA repair mechanism called “non-homologous end joining” (NHEJ). Dr. Alt not only made the initial experimental findings that led to the discovery of this pathway but also carried out an ingenious series of experiments over many years in his lab in Boston, taking it apart piece by piece to understand how it works. This work linked NHEJ to protecting against a specific type of DNA damage called translocation, which is a major component of many cancers, especially leukemia and lymphoma.
Both amplified genes and translocated genes are key components of the Precision Medicine paradigm, which is at the heart of 21st century medicine. By identifying the source of genetic abnormalities that drive both cancer development and drug resistance, Dr. Alt’s insights helped to revolutionize cancer diagnostics and treatment. His discoveries led to a wholly new approach to treating cancer—identifying these genetic abnormalities, and then selecting new drugs that target each specifically.
In his closing remarks at the award ceremony, Dr. Alt said “Now is the time. We have the opportunity, and if we get the support I’m confident that basic cancer-driven research will help exploit this current technological explosion, [producing] more and more breakthroughs at an ever-increasing pace.” Through events like the Szent-Györgyi Prize, NFCR is working towards this goal, by raising public awareness of research and encouraging sustained investment in the future of basic science.
The 2015 Szent-Györgyi Prize Selection Committee was chaired by James Allison, Ph.D., and co-chaired by Sujuan Ba, Ph.D. Other selection committee members included leaders in cancer research and drug development from academic institutes and biotech and pharmaceutical industries: Webster K. Cavenee, Ph.D., Ludwig Institute for Cancer Research; Carlo M. Croce, M.D., The Ohio State University; George D. Demetri, M.D., Dana-Farber Cancer Institute; Richard Gaynor, M.D., Eli Lilly and Company; Thomas J. Kelly, M.D., Ph.D., Memorial Sloan-Kettering Cancer Center; Mary-Claire King, Ph.D., University of Washington School of Medicine; Scott M. Lippman, M.D., Moores Cancer Center; Tak W. Mak, Ph.D., Ontario Cancer Institute; Alex Matter, M.D., Experimental Therapeutics Center & D3, A*STAR Singapore; Scott D. Patterson, Ph.D., Amgen, Inc.; Philip Tsichlis, M.D., Tufts University School of Medicine; Peter K. Vogt, Ph.D., The Scripps Research Institute; Owen N. Witte, M.D., David Geffen School of Medicine, University of California, Los Angeles; Qimin Zhan, M.D., State Key Laboratory of Molecular Oncology, China; and General Secretary Yi Michael Want, M.D., Ph.D., NFCR.