Tracy Grikscheit has her priorities straight. “It goes surgery, science, skiing. That’s the order,” said Grikscheit, principal investigator with USC Stem Cell and The Saban Research Institute of Children’s Hospital Los Angeles, attending surgeon at CHLA and assistant professor of surgery at the Keck School of Medicine of USC. Even though Grikscheit believes that “surgery has to go before science because the kids don’t follow a schedule when they are ill, and you have to look after them first,” she has made astounding breakthroughs in stem cell research. With $6.4 million in grants from the California Institute for Regenerative Medicine, Grikscheit and her team grew human small and large intestine in the laboratory. Their approach is relatively simple: Take discarded human intestine from the operating room, break it up and put it on a felt-like, biodegradable tube in a special machine. Before long, the various progenitors and stem cells begin to work together to form new intestine, which hopefully can eventually be reconnected to the patient’s digestive tract. This could be lifesaving for children and adults with injured or diseased intestine, which can prevent them from absorbing adequate nutrition from their food and necessitate IV nutrition that is eventually toxic to the liver. “It looks like fantastic intestine,” Grikscheit said. “It’s got a nice lining, or epithelium. It has muscle. It has nerve. And it looks as though it’s going to have good function. It’s beautiful.”
Bad skiing, good surgical skills
Growing up near Alta, Utah, Grikscheit discovered her passions for surgery, science and skiing early on. When she was in high school, she visited the University of Utah lab that developed the artificial heart known as the Jarvik 7. This inspired her to become a surgeon, opening her eyes to the potential of combining medicine with engineering.
“I remember thinking, ‘That’s the future,’ ” she said. By age 16, she had already finished high school and been accepted to Harvard University, where she majored in biochemistry. She also lettered in water polo, performed improv theater and studied poetry with late Irish Nobel laureate Seamus Heaney. “There were educational opportunities at Harvard that I wouldn’t have had in Utah, so it was worth four years of terrible skiing,” she said. The bad skiing years continued while she attended medical school and worked in a lab at Columbia University in New York and did her surgery residency and research in another lab at Massachusetts General Hospital in Boston. But the skiing improved with access to Mount Baker and Whistler Blackcomb when she completed her training with a pediatric surgery residency at Seattle Children’s Hospital. Before starting her job at CHLA in 2006, she decided to climb Lhakpa Ri, a Tibetan mountain with a view of Mount Everest. The snows of the monsoon season came early, trapping her at 21,000 feet. The experience tempered her enthusiasm for summiting the world’s tallest peaks and reminded her of the frontiers that matter most to her. “There’s been this revolution in stem cell science in the last decade that’s getting very close to treating people,” she said. “And so, what fun. Science is going to be curing babies.”
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