Mayo Clinic researchers study how body can repair itself

  • Article by: DAN BROWNING , Star Tribune
  • Updated: July 6, 2013 - 10:30 PM

Regenerative medicine offers a “toolbox” with a variety of options to heal, repair and build bodily organs.

 

– At Mayo Clinic’s Center for Regenerative Medicine, physicians and researchers have a dazzling array of tools at their fingertips: transplants, genomics, computerized data analysis and biomedical engineering.

But the core idea is simple: stimulating or restoring the human body’s innate ability to heal itself.

Recent discoveries in cellular biology and genomics have led scientists to the threshold of what transplant cardiologist Dr. Brooks Edwards called the “single most-exciting advance” in his 35 years at Mayo.

“Our goal is that, by the time I retire, we’re not going to need to wait for a tragic accident and a young person to donate a heart or a liver or a kidney. We’re going to be regenerating those organs,” said Edwards, 56. “So then if I’m on a transplant list … I’ll be using my cells or some kind of cell-based therapy to either strengthen my own heart, or regenerate my own heart, or even grow a new heart.”

Edwards predicted that solid organ transplants — say, a liver grown from a patient’s own cells — will take place within a decade. And there will be different solutions for different patients — ranging from bioengineered human cells and pig cells, to mechanical devices and materials such as biocompatible polymers.

“It’s going to be a cafeteria,” said Edwards, who is director of the transplant center and deputy director for regenerative medicine applications at Mayo. “There’s going to be a variety of tools in the toolbox.”

Custom cocktails

Mayo has been involved in stem cell research and prospective therapies for two decades. The clinic’s three campuses — in Minnesota, Florida and Arizona — make up the largest integrated transplant program in the country, performing 1,600 to 1,700 transplants a year, Edwards said. About half involve blood or bone marrow, which he called types of stem cell transplants.

In January 2012, Mayo’s board of governors funded the centers for Regenerative Medicine, Individualized Medicine and Science of Health Care Delivery to drive the latest research from the laboratory to the bedside and to analyze its cost-effectiveness.

Dr. Gianrico Farrugia, director of Mayo’s Center for Individualized Medicine, traces the roots of the latest advances to the sequencing of the human genome 10 years ago.

The breakthrough produced a lot of hype and ­unrealistic promises, he said. But two years ago, Mayo redid its strategic plan and realized that there was no way it could remain true to its core mission — that the needs of the patients come first — without incorporating genomic medicine into routine care and documenting its value.

“At that point we said, ‘OK, now is the point to stop talking about the promise of genomic medicine and start talking about the practice of genomic medicine,’ ” Farrugia said.

It already has produced changes in the way Mayo physicians care for patients. For instance, Mayo has instituted a protocol that blocks a physician from prescribing certain drugs that are known to have adverse side effects for people with certain genotypes until the patient has been tested for a genetic conflict.

Last September, the center established a clinic that initially will focus on advanced cancers and undiagnosed diseases. Patients in a 200-person breast-cancer study are having their genomes sequenced, and pieces of their tumors are preserved and inserted into mice for ongoing tests against certain drugs. A similar project is underway targeting prostate cancer.

Genomics, Farrugia said, could allow doctors to target specific types of tumors with custom cocktails — including so-called orphan drugs that were abandoned because they didn’t help a broad-enough population to be marketable.

Now, Farrugia said, “What we give you is dependent on your tumor and on your own genetic makeup.”

Printing a heart valve

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  • Mayo collaborated with a Massachusetts company to design a bioreactor that mimics conditions in the heart at rest.

  • Physicians and researchers at the Mayo Clinic in Rochester say they see the future of medicine: a smorgasbord of technology that can be used to tap the body’s innate ability to heal itself. Dr Daniel Spoon is working with a bioreactor and a bioprinter with which he hopes to print heart valves. Dr Daniel Spoon holds some pig heart valves]

  • Dr. Daniel Spoon is doing research on whether heart valves could be fabricated on a bioprinter, as shown above in his lab..

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