Mouse embryonic stem cell adherent cell differentiation and cytotoxicity assay

Area of Science:

• Toxicology
• Developmental Biology
• Stem Cell Research

Background:

• Limited toxicological data exists for many environmental chemicals.
• In vitro systems are crucial for profiling xenobiotic effects and predicting developmental hazards.
• Need for assays that assess both cell viability and differentiation simultaneously.

Purpose of the Study:

• To develop and validate an in vitro assay for evaluating chemical effects on stem cell viability and differentiation.
• To establish a method for distinguishing cytotoxicity from effects on differentiation.
• To provide a tool for predicting potential developmental toxicity of environmental chemicals.

Main Methods:

• Development of an adherent cell differentiation and cytotoxicity (ACDC) assay using mouse embryonic stem cells (mESCs).
• Utilized a 9-day culture period followed by In-Cell Western technique.
• Quantified cell number using DRAQ5/Sapphire700 stains and assessed cardiomyocyte differentiation via myosin heavy chain (MHC) protein levels.

Main Results:

• The ACDC assay successfully quantifies both cell number and myosin heavy chain (MHC) protein in the same sample.
• MHC levels corrected for cell number effectively separate cytotoxicity from differentiation effects.
• Demonstrated the assay's capability to evaluate chemical impacts on mESC differentiation and cell count.

Conclusions:

• The ACDC assay is a robust method for assessing chemical-induced effects on stem cell viability and differentiation.
• This assay provides a valuable tool for developmental hazard assessment of environmental chemicals.
• The method allows for simultaneous evaluation of cytotoxicity and differentiation in a single experiment.