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Ostrow School investigators recognized for research

By  Beth Newcomb

Posted May 8, 2013
Reading Time 3 minutes

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Songtao Shi, DDS, PhD (Photo courtesy of the Ostrow School of Dentistry of USC)

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Professor Songtao Shi (Photo by John Skalicky)
Professor Songtao Shi (Photo by John Skalicky)

The International Association of Dental Research (IADR) honored two scientists from the Ostrow School of Dentistry of USC at the association’s general session opening ceremonies on March 20 in Seattle.

Professor Songtao Shi and Postdoctoral Research Associate Carolina Parada, two researchers in the Ostrow School’s Center for Craniofacial Molecular Biology (CCMB), were the honorees.

Shi, an internationally celebrated stem cell scholar, received the Distinguished Scientist Award in Pulp Biology and Regeneration. To receive the Distinguished Scientist awards, IADR members are nominated by their peers for research within a specific subject area. Winners are selected by the IADR Science Awards Committee.

Throughout his career, Shi’s work has identified many promising dental sources of stem cells, including the pulp of baby teeth. In addition to demonstrating the potential of stem cells to regrow diseased or damaged tissue, Shi’s research has also highlighted how stem cell regeneration is moderated by the body’s immune system.

Now he and his collaborators have their sights set on regenerating healthy dental tissue — including periodontal tissue and dental pulp — in humans, potentially changing the way that many oral maladies are treated. Human trials are in the works, Shi noted.

“The root canal has been used for hundreds of years; we want to have living pulp come back,” he said. “We understand the cells, we understand the clinic and we understand dental disease. The dream is to translate this cell therapy to patients.”

Parada won the first-place Bernard Sarnat Award in Craniofacial Biology. The annual award is given to a PhD student or postdoctoral fellow based on a poster presentation at the general session for original research on craniofacial growth and development.

Parada’s research poster detailed the role of extracellular signal-regulated kinase, or ERK, in the development of the palate and tongue. Experimental mice with mutations in the genes responsible for ERK had developed cleft palates, small lower jaws and small tongues before dying at birth.

“The ERK signaling pathway plays a crucial role in the development of both palate and tongue through a combination of different mechanisms,” Parada said. “Cleft palate appears to be a consequence of tongue and mandible defects.”

She added that the result of the ERK mutation in mice is similar to DiGeorge syndrome in humans, which is characterized by both craniofacial and cardiac defects.

“This is a good model to study those complex craniofacial malformations,” said Parada, whose faculty adviser is Yang Chai, director of the CCMB and Ostrow School associate dean of research.

Chai said the awards are great distinctions for Shi and Parada, and they illustrate how successful the CCMB team is at all levels.

“It’s not only our senior investigators conducting groundbreaking research. Our junior investigators consistently accomplish a lot as well,” he said.

“The CCMB has very talented researchers at many different points in their careers all working together here.”

– See more at: http://news.usc.edu/#!/article/50488/ostrow-school-investigators-recognized-for-research/

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