Digital PCR-Based Gene Expression Analysis Using a Highly Multiplexed Assay with Universal Detection Probes to Study...

Area of Science:

• Stem cell biology
• Molecular biology
• Genetics

Background:

• Induced pluripotent stem cells (iPSCs) are crucial for regenerative medicine and disease modeling due to their differentiation potential.
• Cranial neural crest cells (CNCCs) are vital for craniofacial development.
• Accurate gene expression analysis is essential for monitoring stem cell differentiation.

Purpose of the Study:

• To convert existing quantitative PCR (qPCR) assays into multiplexed digital PCR (dPCR) assays.
• To precisely analyze gene expression during the differentiation of iPSCs into CNCCs.
• To compare the performance of qPCR and dPCR for stem cell differentiation studies.

Main Methods:

• Induced pluripotent stem cells (iPSCs) were differentiated into cranial neural crest cells (CNCCs) over 14 days.
• RNA was extracted at days 0, 7, and 14.
• SYBR Green I qPCR assays were converted to multiplexed dPCR assays using universal probes.
• Gene expression of pluripotency and CNCC markers was analyzed using both qPCR and dPCR.

Main Results:

• Four five-plex dPCR assays successfully detected and quantified pluripotency and CNCC marker genes.
• Downregulation of pluripotency markers and upregulation of CNCC markers confirmed successful differentiation.
• dPCR demonstrated superior precision and sensitivity, especially for low-abundance targets.

Conclusions:

• SYBR Green I qPCR assays can be readily converted into multiplex dPCR assays.
• dPCR is a valuable tool for precise gene expression analysis in stem cell research.
• dPCR offers advantages over qPCR for high-precision, low-input sample studies in stem cell differentiation.