CRISPR/Cas9-mediated editing of XPA in induced pluripotent stem cells: A model for investigating Xeroderma...

Area of Science:

• Genetics
• Molecular Biology
• Stem Cell Research

Background:

• Xeroderma pigmentosum group A (XPA) is crucial for DNA repair, specifically removing UV-induced DNA damage via the nucleotide excision repair (NER) pathway.
• Defects in XPA lead to impaired DNA repair, causing genomic instability, mutations, and a high predisposition to skin cancers.

Purpose of the Study:

• To engineer a human induced pluripotent stem cell (iPSC) line with a specific XPA mutation using CRISPR/Cas9 technology.
• To establish a validated isogenic model for studying the molecular effects of XPA deficiency.

Main Methods:

• CRISPR/Cas9 gene editing was employed to introduce a homozygous single nucleotide variant in exon 3 of the XPA gene in human iPSCs.
• Characterization of the engineered iPSC line included assessment of morphology, pluripotency marker expression, and differentiation potential into three germ layers.

Main Results:

• A CRISPR/Cas9-engineered human iPSC line (WTSIi018-B-30) with a defined XPA mutation was successfully generated.
• The resulting iPSCs maintained normal cellular morphology and pluripotency markers.
• The mutant iPSCs demonstrated the capacity to differentiate into all three primary germ layers, confirming their pluripotency.

Conclusions:

• The developed XPA-mutant iPSC line serves as a valuable isogenic research model.
• This model facilitates in-depth investigation into the molecular mechanisms underlying XPA deficiency.
• It offers a platform for exploring and testing potential therapeutic interventions for diseases associated with XPA.