Featured Research

from universities, journals, and other organizations

Jaw bone grown from adult stem cells

Date:
March 31, 2010
Source:
The Record, Columbia University
Summary:
Scientists have succeeded in growing a complex, full-size bone from human adult stem cells. A research team grew a temporomandibular joint from stem cells derived from bone marrow.

Vunjak-Novakovic used CT images (A and B) to build a TMJ-shaped scaffold (C).
Credit: Image courtesy of The Record, Columbia University

A Columbia scientist has become the first to grow a complex, full-size bone from human adult stem cells.

Gordana Vunjak-Novakovic, a professor of biomedical engineering at the Fu Foundation School of Engineering and Applied Science, reports that her team grew a temporomandibular joint (TMJ) from stem cells derived from bone marrow. Her work is reported in the online Early Edition of the journal Proceedings of the National Academy of Sciences this month.

"The TMJ has been widely studied as a tissue-engineering model because it cannot be generated easily, if at all, by current methods," says Vunjak-Novakovic, whose co-authors include Warren L. Grayson, then a post-doctoral student in her lab and now an assistant professor at Johns Hopkins University. Around 25 percent of the population suffers from TMJ disorders -- including those who suffer from cancer, birth defects, trauma and arthritis -- which can cause joint deterioration. Because the TMJ is such a complex structure, it is not easily grafted from other bones in a patient's body. "The availability of personalized bone grafts engineered from the patient's own stem cells would revolutionize the way we currently treat these defects," she says.

Current methods of treating traumatic injury to the jaw include taking a bone from the patient's leg or hip to replace the missing bone. "Wouldn't it be wonderful if we could get the patient's own stem cells and grow a new jaw?" says Dr. June Wu, a craniofacial surgeon at Columbia University Medical Center who advised Vunjak-Novakovic on her research.

Vunjak-Novakovic's technique for turning stem cells into bone was inspired by the body's natural bone-building process. Her team started by analyzing digital images of a patient's jawbone in order to build a scaffold into the precise shape of a TMJ joint. The scaffold itself was made from human bone stripped of living cells. The team then seeded the scaffold with bone marrow stem cells and placed it into a custom-designed bioreactor. The reactor, filled with culture medium, nourished and physically stimulated the cells to form bone. "Bone tissue is metabolically very active," she says. Bone tissue develops best when it is bathed in fluid flowing around it. Vunjak-Novakovic and the team looked into the exact flow rates one needs for optimal effects. After five weeks, they had a four-centimeter-high jawbone that was the precise size and shape of a human TMJ.

The technique can be applied to other bones in the head and neck, including skull bones and cheek bones, which are similarly difficult to reconstruct, but Vunjak-Novakovic started with the TMJ because, "We thought this would be the most rigorous test of our technique," she said. "If you can make this, you can make any shape."

Her team's next step is to develop a way to connect the bone graft to a patient's blood supply to ensure that the graft grows with the person's body. "Our bones change, and these biological grafts would change with us," says Vunjak-Novakovic.


Story Source:

The above story is based on materials provided by The Record, Columbia University. The original article was written by Anna Kuchment. Note: Materials may be edited for content and length.


Journal Reference:

  1. W. L. Grayson, M. Frohlich, K. Yeager, S. Bhumiratana, M. E. Chan, C. Cannizzaro, L. Q. Wan, X. S. Liu, X. E. Guo, G. Vunjak-Novakovic. Regenerative Medicine Special Feature: Engineering anatomically shaped human bone grafts. Proceedings of the National Academy of Sciences, 2010; 107 (8): 3299-3304 DOI: 10.1073/pnas.0905439106

Cite This Page:

The Record, Columbia University. "Jaw bone grown from adult stem cells." ScienceDaily. ScienceDaily, 31 March 2010. <www.sciencedaily.com/releases/2010/03/100330152437.htm>.
The Record, Columbia University. (2010, March 31). Jaw bone grown from adult stem cells. ScienceDaily. Retrieved September 2, 2014 from www.sciencedaily.com/releases/2010/03/100330152437.htm
The Record, Columbia University. "Jaw bone grown from adult stem cells." ScienceDaily. www.sciencedaily.com/releases/2010/03/100330152437.htm (accessed September 2, 2014).

Share This




More Health & Medicine News

Tuesday, September 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Get on Your Bike! London Cycling Popularity Soars Despite Danger

Get on Your Bike! London Cycling Popularity Soars Despite Danger

AFP (Sep. 1, 2014) Wedged between buses, lorries and cars, cycling in London isn't for the faint hearted. Nevertheless the number of people choosing to bike in the British capital has doubled over the past 15 years. Duration: 02:27 Video provided by AFP
Powered by NewsLook.com
Can You Train Your Brain To Eat Healthy?

Can You Train Your Brain To Eat Healthy?

Newsy (Sep. 1, 2014) New research says if you condition yourself to eat healthy foods, eventually you'll crave them instead of junk food. Video provided by Newsy
Powered by NewsLook.com
We've Got Mites Living In Our Faces And So Do You

We've Got Mites Living In Our Faces And So Do You

Newsy (Aug. 30, 2014) A new study suggests 100 percent of adult humans (those over 18 years of age) have Demodex mites living in their faces. Video provided by Newsy
Powered by NewsLook.com
Liberia Continues Fight Against Ebola

Liberia Continues Fight Against Ebola

AFP (Aug. 30, 2014) Authorities in Liberia try to stem the spread of the Ebola epidemic by raising awareness and setting up sanitation units for people to wash their hands. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins