Cytotoxicity assay using a human pluripotent stem cell-derived cranial neural crest cell model

Area of Science:

• Developmental Biology
• Toxicology
• Stem Cell Research

Background:

• Cleft lip and palate are common congenital abnormalities.
• Cranial neural crest cells are crucial for craniofacial development.
• Human pluripotent stem cells can be induced into cranial neural crest-like cells (iNC-LCs).

Purpose of the Study:

• To evaluate the cytotoxic effects of dental materials on iNC-LCs.
• To compare the sensitivity of iNC-LCs to dental materials with other cell lines.
• To establish an in vitro screening method for dental material toxicity.

Main Methods:

• Generated iNC-LCs from a human induced pluripotent stem cell (hiPSC) line.
• Exposed iNC-LCs, MRC-5 (fibroblast), and MC3T3-E1 (osteoblast) cells to titanium ions, palladium ions, and hydroxyethyl methacrylate.
• Assessed cell viability to determine cytotoxic sensitivities.

Main Results:

• iNC-LCs demonstrated sensitivity to tested dental material ions and methacrylate.
• Cytotoxic sensitivities varied between iNC-LCs and the control cell lines (MRC-5, MC3T3-E1).
• The iNC-LC cell-based assay showed potential for predicting toxic effects.

Conclusions:

• The iNC-LCs system is a promising in vitro tool for dental material cytotoxicity screening.
• This method could serve as an alternative to animal testing for assessing developmental toxicity.
• Further validation is needed to predict effects on early craniofacial development.