Neuronal cell lines as model dorsal root ganglion neurons: A transcriptomic comparison

Area of Science:

• Neuroscience
• Molecular Biology
• Genomics

Background:

• Dorsal root ganglion (DRG) neuron-derived immortal cell lines (ND7/23, F-11) are common in vitro models for peripheral sensory neurons.
• A comprehensive comparison of molecular targets in these cell lines versus intact peripheral neurons is currently lacking.

Purpose of the Study:

• To systematically compare the gene expression profiles of commonly used DRG neuron-derived cell lines with native DRG neurons.
• To evaluate the suitability of these cell lines as in vitro models for neuropharmacological studies.

Main Methods:

• Utilized Illumina next-generation sequencing to analyze RNA transcripts in SH-SY5Y, F-11, and ND7/23 cell lines.
• Compared gene expression profiles with native whole murine dorsal root ganglions.
• Performed global gene ontology analysis on both cell lines and native DRG samples.

Main Results:

• The gene expression profiles of the studied cell lines did not align with any specific DRG neuron subclass.
• Key markers for nociceptive sensory neurons, such as the Transient Receptor Potential Vanilloid 1 (TRPV1) gene, were absent in the cell lines.
• Cell lines expressed markers characteristic of both myelinated and unmyelinated neurons.
• Gene ontology analysis revealed similar enrichment of biological process terms across cell lines and native DRG samples.

Conclusions:

• The study provides insights into the receptor repertoire of DRG neuron-derived cell lines compared to native DRG.
• Highlights the limitations and potential applications of these cell lines in neuropharmacological research.
• Suggests caution when using these cell lines as direct surrogates for native peripheral sensory neurons.