Partial Reprogramming of Pluripotent Stem Cell-Derived Cardiomyocytes into Neurons

Area of Science:

• Cell Biology
• Neuroscience
• Stem Cell Research

Background:

• Direct reprogramming of somatic cells is established.
• Interconversion between cell types from different germ layers remains largely unexplored.
• Understanding cell plasticity is crucial for regenerative medicine.

Purpose of the Study:

• To investigate the feasibility of partially reprogramming cardiomyocytes into neurons.
• To characterize the structural and electrophysiological properties of reprogrammed cells.
• To explore the potential of induced cell conversion between distinct germ layer derivatives.

Main Methods:

• Human and mouse pluripotent stem cell-derived cardiomyocytes (PSC-CMs) were transduced with key neurogenic transcription factors (Brn2, Ascl1, Myt1l, NeuroD).
• Morphological changes were assessed post-transduction.
• Gene expression profiling (including single-cell qPCR) was performed to identify neuronal and cardiomyocyte markers.
• Electrophysiological properties were analyzed using patch-clamp techniques.

Main Results:

• Cardiomyocytes adopted neuronal morphologies within 3 days of transduction.
• Reprogrammed cells retained some cardiomyocyte gene expression while acquiring neuronal markers (Tuj1, Map2, NCAM, Dcx, Tubb3).
• Mature neuronal markers (vGlut, synapsin) and neuron-like electrophysiological activity were confirmed by week 3.

Conclusions:

• Pluripotent stem cell-derived cardiomyocytes are amenable to partial neuronal conversion.
• This partial reprogramming yields cells with dual cardiomyocyte and neuronal characteristics.
• The findings demonstrate successful interconversion between cell types from different germ layers, offering potential for novel therapeutic strategies.