Medicine on a Cellular Level

Medical Geneticists, Though Few and Far Between, Are Passionate About Their Work

Peter Hulick’s mantra is printed on his oversized mug: “Medical Genetics: The Future is Now! (But first, coffee.)”

Hulick, who earned his MD at Jefferson in 2001, is medical director of the Mark R. Neaman Center for Personalized Medicine and division head of the Center for Medical Genetics at Endeavor Health (formerly NorthShore University HealthSystem) in Chicago. The mug, a freebie from the American College of Medical Genetics and Genomics, holds both a generous amount of caffeine and the prospect of an exciting new chapter in modern medicine.

“It really is a new frontier,” says Hulick, who also serves as a clinical assistant professor in the Department of Human Genetics at the University of Chicago Pritzker School of Medicine. He likens medical genetics to past inflection points in medicine, such as the development of antibiotics and vaccines, and advances in radiology, including CAT scans. “We’re now into the genomics era of medicine, and physicians who aren’t prepared for that are going to struggle over their careers.”

Gerard Berry, MD ’75, agrees. “In the next 10 years, every medical student will have to become a geneticist from day one.”

Berry, professor of pediatrics at Harvard Medical School, and the Harvey Levy Chair in Metabolism and director of the metabolism program at Boston Children’s Hospital, calls the current time period “the Renaissance for genetics.”

“It’s an exciting time because we’re learning so many new things every day to improve medicine,” says Berry, who served as vice dean of research and professor of pediatrics and biochemistry at Jefferson from 2003 to 2006.

“The options for those who go into genetics are endless,” says Angela Elizabeth Lin, MD ’80, a clinical geneticist, part-time professor of pediatrics at Harvard Medical School, and co-director of the MGH Turner Syndrome and Myhre Syndrome clinics. “Genetics is everywhere and in nearly every patient.”

“Cardiology needs genetics, neurology needs genetics, hepatology needs genetics, pulmonary needs genetics, psychiatry needs genetics, because there are so many genetic diseases associated with them,” says Huda Al-Kouatly, MD, associate professor of maternal-fetal medicine and medical genetics and genomics at Jefferson. “There is no medical specialty that does not have a genetics component.”

Genetics can provide diagnoses for patients who need answers, while at the same time giving physicians the satisfaction of helping those patients, says Andrea Seeley, MD, ’09, director of pediatrics genetics at Geisinger Medical Center in Danville, Pennsylvania.

Yet, for all its progress and promise, medical genetics is still not a highly sought specialty for physicians.

“We are essential, but few and far between,” Lin says.

In fact, in 2020, the Government Accountability Office estimated that there were only about 1,240 boardcertified medical geneticists in the U.S. According to the National Institutes of Health (NIH), there are more than 100 vacancies for board-certified medical geneticists across the nation, but training programs are not enrolling sufficient trainees to meet the current and future demand.

Peter Hulick, MD ‘01 (left) alongside Andrea Seeley, MD, ’09; Gerard Berry, MD ’75; and Angela Elizabeth Lin, MD ’80 (right)

Genetics — Past, Present, and Future

The geneticists say there are many reasons for the lack of interest in genetics, including low awareness of the growing importance and potential of genetics in medicine, insufficient exposure in medical school, few available training programs, a perceived dearth of job opportunities, and lower compensation than other specialties.

“In the past, genetics was once considered esoteric,” Hulick says. “We could diagnose (a condition), but because we didn’t have therapies, we couldn’t do anything about it. It was frustrating.”

But times have changed.

Today, genetics can help diagnose hereditary diseases in people of all ages, including fetuses and newborns. It can also help identify genetic predispositions to disease and allow for earlier detection and possible intervention; predict the risk of developing both genetic and nongenetic diseases; aid physicians in finding the most effective treatment for a patient, including the proper medication and dosage; determine parents’ risk of passing on a disease to their children; and facilitate the development of new treatments and more effective vaccines.

“We’re starting to have targeted therapies that can actually intervene in the biology for various conditions,” Hulick says. Diseases that were once considered incurable are now treatable.

For example, Hulick has a patient with Fabry disease, a rare, inherited disorder that causes a buildup of fat in the body’s cells, which can lead to a number of complications, including heart disease.

“During my early training, there was nothing that could be done for her. But now I have a chaperone therapy treatment to help halt the progression of this woman’s cardiomyopathy,” he says.

Over the past few years, there has also been an explosion in targeted therapies, such as gene transfer protocols, primarily used to introduce new genetic material into cells. This has enabled researchers to study gene function, develop new treatments for diseases through gene therapy, and produce recombinant proteins for research or medical applications.

In addition, RNA interference (RNAi) technologies have the potential to change the way diseases are treated. RNAi technologies are used to create phenotypes that help researchers understand gene function and therapeutic intervention, and can be used to target and degrade disease-causing proteins. For example, RNAi could be used to treat cancer by disabling protein synthesis in cancer cells.

Berry attributes the rapid advances in the study of genetics to the Human Genome Project, considered one of the greatest scientific feats in history. The project, led by an international group of researchers, was completed in 2003, and generated the first sequence of the human genome, providing fundamental information about the human blueprint.

This opened the door to being able to not just identify new diseases, but also to better understand and even treat them.

On the horizon, says Berry, is the potential to diagnose a disease in a fetus, then administer the proper gene that would cure that disease. Researchers are currently working on in-utero gene therapy for conditions such as sickle cell anemia, beta-thalassemia, cystic fibrosis, and metabolic and neurogenetic disorders.

There’s much more to learn in regard to fetal research, he says, but “it’s just a matter of time before in-utero treatments are perfected.”

Another challenge in attracting specialists to genetics is that medical students aren’t exposed to it as early in their careers as they are to other fields.

Lin’s journey into genetics was a bit of a long and winding road.

“I didn’t get into this field by saying, ‘When I grow up I want to be a geneticist,’” she says.

Her original plan of entering the field of plastic surgery veered off into pediatrics with a residency at the Children’s Hospital of Pittsburgh. She then became interested in congenital heart defects associated with genetic syndromes and completed a pediatric cardiology fellowship at UCLA, supplemented by five months at the Children’s Hospital of Philadelphia.

Returning to Pittsburgh, Lin recalls, “I really wanted to do a fellowship in genetics, and since there were no programs in 1986, I created my own at Western Penn Hospital (now affiliated with the University of Pittsburgh).”

After two years of genetics, she knew it was clearly where she wanted to be.

In 1990, she relocated to Boston for a position with the National Birth Defect Center, and later moved to Massachusetts General Hospital. As a medical geneticist, she specializes in the diagnosis and care coordination of several rare disorders, with the hope of providing genetic therapy for one disorder.

Hulick’s initial interest was sparked early on, during his high school AP Biology class.

“We had a big genetics unit, and I loved it,” he says. From there, he took his interest to Northwestern University as a biology major with a concentration in molecular and cellular biology.

He then followed in his family’s footsteps and entered the medical field—and Jefferson. His grandfather (class of ’36) and father (class of ’73) were also alumni of the medical college, and his mother graduated from the Diploma Nurse program with her RN in 1972.

Hulick admits the specialty was a gamble when he first entered the field because he was unsure of the job prospects, but with the guidance of his Jefferson professors, he chose the path that most excited him, and he has never regretted it.

I wanted a field that would unfold over the course of my career, something that would ignite my passions. I found it.

“I wanted a field that would unfold over the course of my career, something that would ignite my passions,” he says. “I found it.”

Berry’s interest in genetics was piqued during medical school at Jefferson. He took an elective one-month rotation at St. Christopher’s Hospital for Children with Angelo DiGeorge, MD, who completed a fellowship in endocrinology at Jefferson in 1954. DiGeorge was a renowned geneticist who discovered the disorder that was named for him. Berry was also inspired by Laird Jackson, MD, a physician-scientist who was one of the country’s earliest practicing geneticists and who went on to advocate genetic counseling,

Jackson, who did his residency at Jefferson in 1959 and went on to become a professor of medicine, pediatrics, and obstetrics and gynecology, ran the Division of Medical Genetics from 1969 to 1998. He helped to discover the “Philadelphia chromosome,” which proved for the first time that a defective chromosome is consistently present in any kind of malignancy.

“All of a sudden, I learned about the world of genetics and metabolic diseases, and I said, ‘This is what I have to do!’” Berry says. He has now spent almost a half-century doing it.

For Al-Kouatly, who is triple board certified in maternal-fetal medicine, medical genetics and genomics, and obstetrics and gynecology, genetics offers constant challenges—and rewards.

“What keeps me going is the discoveries,” she says. “I want to be able to give parents the answers as to why the child has a fetal abnormality.”

She says she became a geneticist at the perfect time, because “a revolution happened after 2012.”

When Al-Kouatly began her fellowship in the late 1990s, the only technology available was the karyotype, which provided a picture of the chromosomes in a person’s cells that identified genetic abnormalities.

“It was very basic. But in 2012, microarray (which makes it possible to detect the expression of thousands of genes at the same time) became available. Then, after 2013, there was an explosion of technology that opened up so many possibilities,” she says.

All the geneticists admit that taking on the specialty can be intimidating.

“It is a complex and difficult discipline,” says Al-Kouatly.

Although complex, Seeley says it’s the only thing she ever wanted to do.

“I became interested in genetics in seventh grade,” she says. “For me, it was a problem-solving and mystery challenge that I could apply in a real-world setting.”

Although Jefferson didn’t have a genetics specialty, Seeley was fortunate that Gerard Berry’s son was a year ahead of her in medical school and introduced her to the renowned geneticist, who then took her under his wing.

During medical school, she attended lectures in genetics, and completed a rotation in genetics at Boston Children’s Hospital and a pediatric elective in genetics at Nemours Children’s Hospital in Delaware. She also researched and wrote a report on the impact and importance of genetic training for physicians for Jefferson’s then-Dean Thomas Nasca.

The report included a concept on which all the geneticists agree—that genetics is the future of medicine.

“Every academic center should have geneticists on staff, and medical school should offer genetics (coursework) because there is a great and growing need,” Al-Kouatly says. “If you belong to an institution that doesn’t have a geneticist, it’s like having a blind spot; you are not going to see what you need to see.”

Huda Al-Kouatly, MD

Limitless Possibilities

Hulick is optimistic that genetics is quickly moving from the background of medicine into the spotlight, and that a growing awareness, interest, and demand on the part of patients could propel the field further faster.

His Neaman Center for Personalized Medicine recently held an informational event that drew more people than expected. “People were engaged in it; they wanted the information.”

Seeley notes that the population is becoming more aware of how genetics impacts their health and their lives. They are doing their own research, forming social network groups to exchange information, and communicating with each other to discuss research.

“The awareness [of patients] is really helpful,” Seeley says. “There are a majority of referrals that are patient initiated versus physician initiated.”

Also helpful in propelling genetics into the public eye is the faster turnaround time for results and the lowering costs of tests.

“When I started my pediatric and genetics training, we were just starting to be able to offer exome sequencing, and the turnaround time was close to six months,” Seeley says. Now, she can get a rapid genome test result in five days. “And the cost has come down dramatically, making it easier to justify to insurance companies.”

An example, says Hulick, is the test for two very common genes — BRCA1 and BRCA2 — which cost about $4,000 per patient if insurance didn’t cover it. However, in the mid-2000s, the new technology and next-generation sequencing technology brought that price down to just a few hundred dollars.

While many genetic tests are still expensive, Hulick notes that they are a cost-effective health measure, as it costs less to discover and treat a condition earlier in life rather than later.

Privacy was another contributing factor in the hesitancy in using genetic testing. Until the Genetic Information Non-Discrimination Act was passed in 2008, patients were concerned that their genetic testing could be used against them by employers and insurance companies.

And an ongoing consideration, says Berry, is ethics — what to do with the information once you have it.

“For example, if a baby tests positive for the BRCA gene mutation, at what point in her life do you tell her? And if someone has the gene for Lou Gehrig’s disease (ALS) that might surface later in life, do you tell them and have them suffer with that knowledge for five decades?”

While some patients might prefer to not know their risk factor, Berry says that “knowledge is power and part of being able to make informed decisions about health.”

Hulick says he hopes the explosion of data, the new understandings of diseases, the ability to treat conditions, and the public’s interest will encourage more medical students to enter the field.

For those who choose to do so, he says, the options are endless.

“One of the beauties of genomics and genetics is that it opens the door to any field; you can run the gamut — be a general geneticist or have more specialized clinics,” Hulick says. Some of those clinics include rare syndromes, oncology, cardiology — even pharmacology, as pain medications have pharmacogenomic implications that can affect recovery and length of stay in the hospital.

Genetics has grown to the point it’s difficult to find an occasion where it doesn’t have an impact on a patient’s care, he says, noting that it is the future of new treatments and cures for all types of diseases, including cancer, multiple sclerosis, sickle cell anemia, and more.

“It could be direct targets for therapies or being better able to predict who may or may not respond to therapies,” Hulick says, explaining that genetics plays a part in who will respond to certain treatments and who will not.

The geneticists agree that genomics is a part of the practice of medicine, and over the next decade, it will be increasingly incorporated into care, especially since the technology is expanding at a rapid rate and the costs are coming down.

The question is whether there will be enough medical geneticists to keep up with the demand.

At Jefferson, Al-Kouatly is doing her part to engage students in the field. She is a passionate mentor to her trainees, some of whom have gone on to pursue maternal-fetal medicine and genetics fellowships at the nation’s top institutions.

She says a key aspect of attracting medical students to the field lies in funding.

“If I had more funding, I could take more medical students under my wing,” she says. “Funding would help me conduct more research, and send more students to conferences.”

She believes that funding residencies and fellowships would be particularly beneficial, as “it is during that time that trainees get the exposure.” In addition, sponsorship for lecture series would also help to bring the field to light for students, particularly lectures tailored to every specialty.

Seeley believes that sparking interest in genetics while students are still in medical school doing rotations is the key to attracting more to the specialty—a specialty she says is very satisfying.

“If you want a field that you can grow with, one that will excite you from the day you start to the day you retire, this is the field,” Hulick says. “When you pick a specialty, it’s easy to get excited about the very unusual patient or case, but you also have to get excited about what’s considered mundane in your field. There’s nothing mundane about genetics.”

Berry calls genetics the future of medicine — one that any physician would find fulfilling.

“If you like to know why things are the way they are and how things happen, if you want to try to cure diseases, if you want to make life better, go into genetics!”

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