Novel cell lines display properties of nociceptive sensory neurons

Hybrid cell lines derived from neonatal rat dorsal root ganglia neurons fused with the mouse neuroblastoma N18Tg2 exhibit sensory neuron-like properties not displayed by the parental neuroblastoma. These properties include an inward (depolarizing) current with a conductance increase in response to activation of a bradykinin receptor, an inward (depolarizing) current with a conductance increase in response to the sensory excitotoxin capsaicin, the expression of sensory neuropeptides (substance P, CGRP and somatostatin), the expression of phosphatidylinositol-anchored molecules including adhesion molecules of the immunoglobulin superfamily that can be regulated in serum-free culture by nerve growth factor (N-CAM, F-3 and Thy-1), and low permissivity to herpes simplex virus infection. These lines thus provide appropriate models for the study of mechanisms involved in nociceptor activation and the regulation of expression of sensory-neuron specific markers including neuropeptides.

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