Figure 2
From: Neuroexcitatory effects of morphine-3-glucuronide are dependent on Toll-like receptor 4 signaling
![Figure 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1742-2094-9-200/MediaObjects/12974_2012_725_Fig2_HTML.jpg)
Calcium imaging of functional Toll-like receptor 4 signaling in cultured dorsal root ganglion neurons. (A) Toll-like receptor 4 (TLR4)-IR (green) is largely restricted to neurons and not non-neuronal cell types (blue, DAPI) in dissociated dorsal root ganglion (DRG) cultures. (B) Representative recording of a transient intracellular calcium increase in a dissociated DRG sensory neuron via lipopolysaccharide (LPS) administration (1 μg/mL).