New York
June
8, 2005—Baby and wisdom teeth, along with jawbone and periodontal ligament, are
non-controversial sources of stem cells that could be "banked" for
future health needs, according to a National Institutes of Health researcher
who spoke today at the American Dental Association's national media conference.
Harvested from the pulp layer inside the teeth, jawbone and periodontal
ligament, these stem cells may one day correct periodontal defects and cleft
palate, and may help restore nerve cells lost in diseases such as Parkinson's,
according to Pamela Gehron Robey, Ph.D., Chief, Craniofacial and Skeletal
Diseases Branch, National Institute of Dental and Craniofacial Research of the
National Institutes of Health, Department of Health and Human Services. Stem cells
have the potential to save injured teeth and grow jawbone.
Regenerating
an entire tooth is on the horizon, and years from now, Dr. Robey said stem
cells from teeth and jawbo- ne might be used to correct cleft palate, one of
the most common birth defects, sparing children multiple surgeries. "As
long as a cell has a nucleus, anything is possible," Dr. Robey states. In
time, individuals may be able to bank their own stem cells from baby and wisdom
teeth, similar to the way umbilical cord blood is stored. At present,
commercial facilities to store stem cells from teeth are not available.
According to Dr. Robey, the viability of stem cells derived from baby teeth is
determined by when the tooth comes out. The longer a loose tooth is left in the
mouth to fall out on its own, the less viable it is as a source of stem cells.
As research in the field progresses, Dr. Robey hopes that stem cells from baby
and wisdom teeth may one day restore nerve cells damaged by diseases such as
Parkinson's Disease, one of the most common neurological disorders affecting
the elderly.
"The
stem cells from jawbone and teeth share a common origin with nerve
tissue," Dr. Robey points out. "With the proper cues, researchers may
be able to encourage them to form nerve-like tissue which may restore cells
that make dopamine, but much more work is needed." Dopamine is a brain
chemical that nerve cells need to properly function. To extract the stem cells
from teeth, researchers can remove the periodontal ligament, drill into the
tooth to remove the crown and then extract the pulp which is placed in an
enzyme solution to release the stem cells. From jawbone, cells can be isolated
by collecting marrow following a tooth extraction, for example, or by biopsy.
Therapeutic Application
Dental Stem Cells can
Differentiate into...
|
This has Potential Benefit in..
|
|
|
|
|
Cardiac cells (heart cells)
|
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Repair damage caused by Myocardial
Infarction (Heart Attack)
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Neurones (nerve cells)
|
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Repair due to stroke or other
degenerative diseases
|
Myocytes (muscle cells)
|
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Repair loss due to crush-injuries
or other degenerative diseases
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Osteocytes (bone cells)
|
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Repair fractures and other
joint/bone diseases
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Adipocytes (fat cells)
|
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Restore fat loss
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Chondrocytes (cartilage cells)
|
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Repair of cartilage after injuries
or other degenerative diseases such as Osteoarthritis
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Dermal tissue (skin cells)
|
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Assistance in Plastic Surgery
applications
|
- Mesenchymal stem cells help repair hearts damaged by heart attack -- in part by becoming heart cells themselves.
- Autologous Mesenchymal Stem Cell Therapy Delays the Progression of Neurological Deficits in Patients With Multiple System Atrophy -May 2008
- Mesenchymal Stem Cell Transplantation Accelerates Hearing Recovery through the Repair of Injured Cochlear Fibrocytes
- Mesenchymal stem cells have shown to have a Therapeutic potential of in prostate cancer bone metastasis –
- Clinical applications of human Mesenchymal Stem Cells are evolving rapidly with the aim to improve hematopoietic engraftment, expanding HSC, preventing graft-versus-host disease (GVHD), correcting inborn metabolic errors and delivering a variety of therapeutic genes into the cells.
Applications of mesenchymal stem cells in tissue
engineering and regenerative medicine
Mesenchymal stem cells have been
used to regenerate marrow microenvironment after myeloablative therapy.
The
use of natural and synthetic biomaterials as carriers for mesenchymal stem
cells delivery has shown increasing promise for orthopedic therapeutic
applications, especially bone formation. Mesenchymal stem cells are ideal for
treating arthritis and connective tissue ailments. When introduced into the
infarcted heart, mesenchymal stem cells prevent deleterious remodeling and
improve recovery. Number of reports have also indicated that these cells
possess the capacity to trans-differentiate into epithelial cells and lineages
derived from the neuro-ectoderm, and in addition, mesenchymal stem cells can
migrate to the sites of injury, inflammation and to tumors. These properties of
mesenchymal stem cells make them promising candidates for use in regenerative
medicine and may also serve as efficient delivery vehicles in site-specific
therapy.
Future Research on Mesenchymal Stem Cells
According
to American Diabetes Association, mesenchymal stem cells can be the key to
healing diabetic foot ulcers: Diabetic foot ulcers are the primary cause of
hospital admissions for diabetics. Foot ulcers that heal improperly are at risk
for infection, which can lead to amputation
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