ROCK inhibitor is not required for embryoid body formation from singularized human embryonic stem cells

Area of Science:

• Stem Cell Biology
• Developmental Biology
• Biotechnology

Background:

• Human embryoid bodies (hEBs) are crucial for studying early human development and disease modeling.
• Current methods for hEB formation often rely on ROCK inhibitor (ROCKi) and centrifugation, which can be costly and time-consuming.

Purpose of the Study:

• To develop a simplified and scalable technology for forming human embryoid bodies (hEBs) from singularized human embryonic stem cells (hESCs).
• To eliminate the need for ROCK inhibitor (ROCKi) and centrifugation in hEB production.

Main Methods:

• Human embryonic stem cells (hESCs) were singularized and plated into non-adherent hydrogel microwell arrays.
• hEB formation was assessed under four conditions: with or without ROCKi and with or without centrifugation.
• The quality, size, and differentiation potential of hEBs were evaluated.

Main Results:

• Consistent and spherical hEBs were formed across all tested conditions, including the absence of ROCKi and centrifugation (-ROCKi/-spin).
• hEBs generated without ROCKi or centrifugation successfully differentiated into the three embryonic germ layers.
• The simplified method demonstrated homogeneity in hEB size and shape, supporting synchronous differentiation.

Conclusions:

• A novel, simplified technology enables efficient hEB formation without ROCKi or centrifugation.
• This method offers a cost-effective, scalable, and xeno-factor-free approach for producing uniform hEBs.
• The technique is suitable for automated, large-scale production of hEBs for clinical and research applications.