Science runs in the family
June 18, 2015 § Leave a comment
Some scientists credit schoolteachers or graduate-school and postdoctoral advisers as their career role models. Henrik Dohlman at the University of North Carolina stays within his family. He credits his father.
“I really look up to him,” he says of Claes Dohlman. “He’s not only done great things professionally, he’s a very kind man.”
“Great things professionally” is a fair description. Claes Dohlman is a well-known figure in vision research. Inducted into the American Society of Cataract and Refractive Surgery’s Hall of Fame in 2004 and the recipient in 2007 of the American Academy of Ophthalmology’s highest honor, the Laureate’s Award, the elder Dohlman who is an emeritus professor at Harvard University, is considered the founder of modern corneal science. His research into corneal physiology established the basis for current clinical practice with dry eye disease, corneal burns, wound healing and corneal transplantation.
Although he retired from university administration in 1989, Claes Dohlman has stayed on as a scientist. At 92, he is the director of Boston Keratoprosthesis Research and Development, which is part of Massachusetts Eye and Ear, where he created and works to perfect a device he is now famous for: an artificial cornea known as the “Boston keratoprosthesis.” The artificial cornea can be used on patients who can’t rely on standard human corneal transplants, such as chemical-burn victims. A prosthetic that resembles a collar button, it is made of medical-grade plastic and titanium. Since cleared by the FDA in 1992, over 10,000 patients have had the device inserted in their eyes.
The older Dohlman turned his full attention to the device in the 1990s, once he retired from being the chair of Harvard’s ophthalmology department, director of his ophthalmology laboratory, and a chief at Massachusetts Eye and Ear.
With a hint of understatement, the younger Dohlman says of his father, “He has a lot of energy.”
From Sweden to the U.S.
Science and medicine surrounded Claes Dohlman as he grew up in Sweden. His father was the chairman of the ear, nose, and throat department at the University of Lund. “It was hinted that there was only one worthwhile profession to consider and that was academic medicine,” remembers Dohlman. “All my friends were heading for medicine so I followed the path of least resistance.”
Dohlman got an M.D. and finished a residency in ophthalmology at the University of Lund’s Eye Clinic. Drawn by the work of Jonas Friedenwald at Johns Hopkins University on the histochemistry and biochemistry of corneal wound healing, Dohlman did a fellowship with him in the early 1950s in Baltimore, Md. He returned to Sweden to get a Ph.D. in biochemistry from the Karolinska Institute.
A famous retina surgeon in Boston, Charles Schepens, noticed Dohlman’s work. He offered Dohlman a fellowship at Harvard. Having been in the U.S. for the Hopkins fellowship, Dohlman says, he knew that “the possibilities, professionally, were so much greater.”
So in 1958, Dohlman and his wife, Carin, moved to the U.S. with three children. Two years later, Henrik became their fourth child and the first to be born in the U.S. Two more children followed.
The little professor
Henrik Dohlman displayed traits of an academic at a young age. “He was a little professor from the start,” says his father. “He was always very curious, always eager to lecture people on how things really are and copiously read all kinds of literature.”
He also had a willingness to experiment. Claes Dohlman describes a moment in 1968 when he and Carin opened the front door of their home to a sales representative from a hearing-aid company. All of the adults were confused. The sales representative insisted that a Henrik Dohlman had contacted the company. The parents couldn’t figure out why a hearing-aid sales representative wanted to see an 8-year-old boy.
The confusion cleared when the child admitted to finding an advertisement that offered free testing of a hearing aid.
“I had this image that it would give me super powers, and I would hear what people were saying at great distances,” says Henrik Dohlman, still sounding sheepish almost five decades after the incident. “So I filled out the card, and then the salesman showed up. When he discovered that the person he was about to try to sell a hearing aid to was an 8-year-old boy with perfect hearing, he stomped off.”
The younger Dohlman recalls his childhood home in Arlington, Mass., as filled with joyful chaos of a large and close-knit family. “When my father came from work, we all swarmed to greet him and he would be tackled by his kids,” he says. “Dinnertime was masses of spaghetti and conversation.”
But Henrik Dohlman got hints from a young age that his father also was a well-known figure in the community. “Every time I would pass the principal of my elementary school, he’d tousle my hair and say, ‘How’s the son of the famous Dr. Dohlman?’ I figured if my principal knew who he was, then my father must be prominent.”
Education was critical in the Dohlman family. Among the six, two are M.D.s and the rest are Ph.D.s. Henrik Dohlman says his father is very proud of the fact that all his children hold advanced degrees. “If I can say one thing about my parents, it is that they were exceedingly generous financially,” says Dohlman. “They put six kids through college and then graduate or medical school. It’s something I took for granted when I was growing up. But once I got to college and grad school, I realized what a gift that was, to have no financial barriers to completing my education. That’s my inheritance.”
Henrik Dohlman was the only one to go into the life sciences. His other Ph.D.-toting siblings are economists. He credits his mother for turning him onto biology even though she holds a degree in political science. Carin Dohlman also grew up in Sweden, where, as her son notes, all schoolchildren are taught to appreciate the natural world and revere the 18th-century botanist and zoologist Carl Linnaeus who laid the foundations for modern species nomenclature and ecology. Carin Dohlman shared her love and wonder of nature with Henrik.
Identity of his own
Despite earning a Ph.D. in biochemistry like his dad, Henrik Dohlman, who is also an associate editor for the Journal of Biological Chemistry, is quick to point out that he was always intent on making his way through science as independently as possible. His research portfolio at UNC focuses on understanding the fundamental properties of yeast G protein-coupled receptors, a far cry from clinical corneal research.
Ironically, the first project Henrik Dohlman was involved in as a graduate student landed him in his father’s territory. The younger Dohlman was in the laboratory of Robert Lefkowitz at Duke University in the 1980s. At the time, the laboratory was focused on cloning the β-adrenergic receptor, the first hormone-based G protein-coupled receptor identified and cloned. The work later led to Lefkowitz’s Nobel Prize in chemistry in 2012, shared with Brian Kobilka at Stanford University.
“I thought I was working in an area that had nothing to do with vision research,” says Henrik Dohlman. “But the first thing we noticed about this receptor was it was clearly homologous to rhodopsin, the light receptor.”
Because of the striking similarities between the two systems, Henrik Dohlman’s first scientific conference was the annual meeting of the Association for Research in Vision and Ophthalmology. “It was not only one of my first public presentations, but it was a public presentation in front of about 500 of my father’s friends and colleagues, with my father in the front row,” recounts the younger Dohlman.
Perhaps realizing how unprepared his son was for his first presentation at a national scientific meeting, the older Dohlman pulled him aside and asked to see the slides and hear the talk before the event. “It was a very painful experience for both of us,” recalls his son. “The talk that came out in the end bore no resemblance to what I’d prepared. It was the first and last time I’ve given a scientific presentation with my father in the audience.”
But the younger Dohlman acknowledges that the pain of having his father redo his first public presentation for him was well worth it. “I’m a much better public speaker because of it!” he says with a laugh.
“Just shrug it off”
Besides teaching him the value of a good talk, Claes Dohlman has influenced Henrik in two other critical ways. “Probably the most important one was that I saw from an early age that he really loved his work,” says his son. “That’s not a bad way to go through life.”
Claes Dohlman also modeled what it is to be a good laboratory manager. “He’s always had a positive outlook. He rarely loses his temper. He tries to be generous in assigning credit. He does not get distracted by office politics or idle gossip,” says the younger Dohlman.
When it comes to research, Claes Dohlman knows how to roll with the punches. Something his son says he’s still working on. “There are many failures in this business. There are a lot of setbacks, and there’s no escaping that. You can drive yourself crazy if you let it get under your skin. The best that you can do is brush it off and move onto the next challenge,” says Henrik Dohlman. “I hear my father’s voice in my head saying, ‘Just shrug it off.’”