Investigating the Function of Adult DRG Neuron Axons Using an In Vitro Microfluidic Culture System

A critical role of the peripheral axons of nociceptors of the dorsal root ganglion (DRG) is the conduction of all-or-nothing action potentials from peripheral nerve endings to the central nervous system for the perception of noxious stimuli. Plasticity along multiple sites along the pain axis has no...

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Bibliographic Details
Published in:	Micromachines (Basel) Vol. 12; no. 11; p. 1317
Main Authors:	Atmaramani, Rahul, Veeramachaneni, Srivennela, Mogas, Liz Valeria, Koppikar, Pratik, Black, Bryan J., Hammack, Audrey, Pancrazio, Joseph J., Granja-Vazquez, Rafael
Format:	Journal Article
Language:	English
Published:	Basel MDPI AG 27-10-2021 MDPI
Subjects:	axonal stimulation Axons Cellular communication Central nervous system Cytokines dorsal root ganglia drug discovery Growth factors Ion channels maladaptive plasticity Medical research Microchannels Microfluidics Neurons nociception Pain Perturbation Signal transduction Silicon wafers St Louis Missouri United States > US
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Summary:	A critical role of the peripheral axons of nociceptors of the dorsal root ganglion (DRG) is the conduction of all-or-nothing action potentials from peripheral nerve endings to the central nervous system for the perception of noxious stimuli. Plasticity along multiple sites along the pain axis has now been widely implicated in the maladaptive changes that occur in pathological pain states such as neuropathic and inflammatory pain. Notably, increasing evidence suggests that nociceptive axons actively participate through the local expression of ion channels, receptors, and signal transduction molecules through axonal mRNA translation machinery that is independent of the soma component. In this report, we explore the sensitization of sensory neurons through the treatment of compartmentalized axon-like structures spanning microchannels that have been treated with the cytokine IL-6 and, subsequently, capsaicin. These data demonstrate the utility of isolating DRG axon-like structures using microfluidic systems, laying the groundwork for constructing the complex in vitro models of cellular networks that are involved in pain signaling for targeted pharmacological and genetic perturbations.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2072-666X 2072-666X
DOI:	10.3390/mi12111317