Human Embryonic Stem Cell-Derived Wilson's Disease Model for Screening Drug Efficacy

Area of Science:

• Stem cell biology
• Genetics and genomics
• Disease modeling

Background:

• Human pluripotent stem cells (hPSCs) are valuable for disease modeling.
• Patient-derived induced pluripotent stem cells (hiPSCs) are limited by sample rarity.
• Alternative methods are needed for modeling rare genetic diseases like Wilson's disease.

Purpose of the Study:

• To develop a Wilson's disease model using gene editing in hPSCs without patient samples.
• To assess the utility of this model for disease phenotyping and drug screening.

Main Methods:

• Utilized CRISPR/Cas9 gene editing to introduce the R778L mutation in the ATP7B gene into wildtype hESCs.
• Differentiated Wilson's disease hESCs into hepatocyte-like cells (HLCs).
• Analyzed HLCs for disease phenotypes and drug responses.

Main Results:

• Successfully generated Wilson's disease hPSCs with the R778L ATP7B mutation.
• The mutation did not affect hESC self-renewal or HLC differentiation potential.
• R778L-mutated HLCs showed increased vulnerability to copper overload and responded to therapeutic agents.

Conclusions:

• The established gene-edited hPSC model effectively mimics Wilson's disease phenotypes.
• This model provides a reliable alternative for studying Wilson's disease and for drug screening without patient-derived cells.