Are We as Crazy as Mad Cows?
Susan L. Lindquist, Professor of Biology, MIT
Description: When proteins in our body work properly, we can see, smell, consume and digest food, grow muscle and brain cells. But when these infinitely useful biological building blocks fail, the most pernicious diseases arise. Susan Lindquist has scrutinized the complex origami-like shapes of proteins and come to understand how structural mistakes can lead to a frightening class of neurodegenerative disorders, including "Mad Cow Disease." It turns out that misfolding in just one part of a protein can transform it from a helpful agent to an infectious material capable of replicating itself. Over time, these misshapen proteins, called prions, run roughshod in the brain, leaving holes where normal cells once functioned. The evolution of this disease may take decades in humans, so Lindquist has teamed up with yeast, which can produce millions of generations of cells in a short time, and provide the perfect laboratory for studying prions. In fact, says Lindquist, "yeast cells share an amazing variety of basic biology with humans as different as we are physically." Lindquist is now systematically looking in yeast for factors "that predispose proteins to get into trouble" and for chemical compounds that can reverse these malfunctions. These compounds may turn into the next generation's cure for Alzheimer's or Parkinson's disease.
About the Speaker(s): Susan L. Lindquist is a pioneer in the study of protein folding. She works not only with bakers' yeast, but also with fruit flies, the plant Arabidopsis and mammals. Her labs use genetics, molecular and cell biology to understand the mechanisms of prion propagation, generation of diversity and human disease. Lindquist came to the Whitehead in 2001 from the University of Chicago where she was the Albert D. Lasker Professor of Medical Sciences in the Department of Molecular Genetics and Cell Biology, and an Investigator in the Howard Hughes Medical Institute. She received her Ph.D. in Biology from Harvard University in 1976, going to the University of Chicago as an American Cancer Society Post-doctoral Fellow before joining the faculty there in 1977. She was elected to the American Academy of Arts and Sciences in 1996 and the National Academy of Sciences in 1997, the same year she became a Fellow in American Academy of Microbiology. In 2000, she was awarded the Novartis Drew Award in Biomedical Research.
Host(s): School of Science, Whitehead Institute for Biomedical Research
Tape #: T18425,
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