Stem cells from human exfoliated deciduous teeth--isolation, long term cultivation and phenotypical analysis.
OBJECTIVE
Our aims were to isolate stem cells from human exfoliated deciduous teeth (SHED), to cultivate them in vitro and to investigate their basic biological properties, phenotype and to compare our findings with dental pulp stem cells (DPSC) isolated from permanent teeth.


METHODS
Dental pulp was gently evacuated from exfoliated teeth. After enzymatic dissociation of dental pulp, SHED were cultivated in modified cultivation media for mesenchymal adult progenitor cells containing 2% FCS and supplemented with growth factors and insulin, transferrin, sodium (ITS) supplement. Cell viability and other biological properties were examined using a Vi-Cell analyzer and a Z2-Counter. DNA analyses and phenotyping were performed with flow cytometry.


RESULTS
We were able to cultivate SHED over 45 population doublings. Our results showed that SHED cultivated under same conditions as DPSC had longer average population doubling time (41.3 hrs for SHED vs. 24.5 hrs for DPSC). Phenotypic comparison of cultivated SHED to that of cultivated DPSC showed differential expression CD29, CD44, CD71, CD117, CD 166. During long-term cultivation, SHED did not showed any signs of degeneration or spontaneous differentiation.


CONCLUSIONS
We isolated stem cells from exfoliated teeth. In comparison to DPSC, SHED proliferation rate was about 50% slower, and SHED showed slightly different phenotype. These cells may be extremely useful for stem cell tissue banking, further stem cell research and future therapeutic applications.
Suchánek
Jakub
J
Charles University in Prague, Faculty of Medicine, Department of Dentistry and University Hospital Hradec Králové, Czech Republic. suchanekj@lfhk.cuni.cz
Visek
Benjamín
B
Soukup
Tomdi
T
El-Din Mohamed
Sally Kamal
SK
Ivancaková
Romana
R
Mokrỳ
Jaroslav
J
Aboul-Ezz
Eman H A
EH
Omran
A
A
D000328:Adult; D015703:Antigens, CD / Q000032:analysis; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D002648:Child; D003782:Dental Pulp / Q000166:cytology*; D006801:Humans; D008964:Molar, Third / Q000166:cytology; D013234:Stem Cells / Q000166:cytology* / Q000276:immunology; D014080:Tooth Exfoliation; D014094:Tooth, Deciduous / Q000166:cytology*
D015703:Antigens, CD