Functionally Distinct Shed Subpopulations Detected After Magnetic-Activated Cell Sorting of CD71 and CD146

Area of Science:

• * Regenerative Medicine
• * Stem Cell Biology
• * Tissue Engineering

Background:

• * Human exfoliated deciduous teeth (SHED) are a promising stem cell source for regenerative therapies.
• * SHED possess multipotency, proliferative capacity, and immunomodulatory properties.
• * Functional heterogeneity within SHED populations necessitates characterization for targeted applications.

Purpose of the Study:

• * To isolate and characterize SHED subpopulations based on CD71 and CD146 expression.
• * To evaluate the multilineage differentiation potential of these distinct SHED subpopulations.
• * To understand how CD71 and CD146 expression influences SHED differentiation outcomes.

Main Methods:

• * Isolation of SHED subpopulations (CD71+, CD71-, CD146+, CD146-) using magnetic-activated cell sorting (MACS).
• * Confirmation of surface and intracellular marker expression (STRO-1, CD44, nestin, vimentin) via immunocytochemistry.
• * Assessment of osteogenic, adipogenic, and chondrogenic differentiation potential of isolated subpopulations.

Main Results:

• * CD71+ SHED exhibited reduced osteogenic capacity compared to CD71- cells.
• * CD146+ SHED demonstrated enhanced osteogenic and adipogenic differentiation.
• * Chondrogenic differentiation was not significantly affected by CD71 or CD146 expression under 2D culture conditions.

Conclusions:

• * CD71 and CD146 expression independently influence SHED differentiation potential, highlighting functional heterogeneity.
• * Enrichment of CD146+ SHED may optimize osteogenic and adipogenic regenerative applications.
• * CD71+ SHED subsets can serve as models for studying proliferation and paracrine effects in regenerative medicine.