[Exploring the stem cell surface markers expressed in human dental pulp stem cells].

Area of Science:

• Stem cell biology
• Dental tissue engineering
• Cell surface marker analysis

Background:

• Human dental pulp stem cells (hDPSCs) are a promising source for regenerative medicine.
• Characterizing surface markers is crucial for understanding hDPSC identity and function.
• Magnetic-activated cell sorting (MACS) is a common method for isolating specific cell populations.

Purpose of the Study:

• To investigate the expression of key stem cell surface markers in hDPSCs isolated using MACS.
• To assess the stability of these markers across multiple cell generations.
• To confirm the multipotency of isolated hDPSCs through differentiation assays.

Main Methods:

• hDPCs were isolated from third molars and cultured.
• hDPSCs were purified using MACS with the STRO-1 antibody.
• Surface marker expression (CD73, CD90, CD105, CD166, STRO-1) was analyzed across generations 3-8.
• In vitro differentiation into adipocytes and osteoblasts was induced and assessed via Oil Red O and Alizarin Red staining, respectively.

Main Results:

• Isolated hDPSCs demonstrated successful differentiation into adipocytes and osteoblasts.
• Oil Red O and Alizarin Red staining confirmed successful adipogenic and osteogenic differentiation.
• STRO-1 expression showed a decreasing trend with increasing cell passage number.
• CD73, CD90, CD105, and CD166 expression levels remained relatively consistent across generations.

Conclusions:

• hDPSC multipotency is confirmed by their ability to differentiate into adipocytes and osteoblasts.
• The expression of STRO-1 declines with successive cell generations.
• CD73, CD90, CD105, and CD166 are stable surface markers for hDPSCs across multiple passages, suitable for identification and characterization.