Developing iPSC models from phenylketonuria patients with varying PAH gene mutations

Area of Science:

• Genetics
• Genomics
• Stem Cell Biology

Background:

• Phenylketonuria (PKU) is an autosomal recessive metabolic disorder.
• It results from phenylalanine hydroxylase (PAH) gene variants, leading to phenylalanine accumulation and neurological issues.
• Over 2,200 PAH variants and compound heterozygosity complicate genotype-phenotype prediction.

Purpose of the Study:

• To generate patient-specific induced pluripotent stem cells (iPSCs) from individuals with PKU.
• To establish a cellular model for investigating PKU pathophysiology.
• To facilitate the development of personalized therapeutic strategies for PKU.

Main Methods:

• Collected peripheral blood mononuclear cells from four PKU patients with distinct PAH genotypes.
• Generated human iPSCs using non-integrating Sendai viruses.
• Validated iPSC lines for pluripotency, vector clearance, and genomic integrity.

Main Results:

• Successfully generated and validated patient-specific human iPSC lines.
• Confirmed pluripotency, successful vector clearance, and genomic integrity of the iPSC lines.
• Established a valuable cellular platform for PKU research.

Conclusions:

• Patient-specific iPSCs offer a powerful tool for understanding PKU.
• This platform supports mechanistic studies of PKU pathophysiology.
• It advances the development of personalized treatments for PKU patients.