Although it's unclear just how the damage occurs, one possibility is that the buckyball nanocrystals enter the brain via olfactory neurons, a route traveled by other small particles.
Researchers at the University of Tokyo have created a method for growing and connecting single neurons using geometric patterns to route the neurons more precisely, cell by cell.
We show that the converting fibroblasts do not transit through a proliferative neural progenitor state, and thus form bona fide motor neurons via a route distinct from embryonic development.
Parts of this action cancellation signal from the STN may also be relegated via arkypallidal pathways (orange pathways in Figure 1A) that relay inhibitory signals back up to the striatal neurons, offering a route for hyperdirect signals to terminate action plans within the striatum itself (Dodson et al., 2015).
These neurons do provide a disynaptic route by which corticospinal neurons can influence forearm motor neurons (Alstermark et al., 1999), although they may normally be subject to high levels of inhibition both in anaesthetized (Maier et al., 1998) and awake (Olivier et al., 2001) animals.
Reports of retrotransposition (Baillie et al., 2011; Coufal et al., 2009; Evrony et al., 2012; Li et al., 2013; Muotri et al., 2005; Perrat et al., 2013) and other genomic abnormalities (Cai et al., 2014; Gole et al., 2013; McConnell et al., 2013) in animal neurons may therefore be important given that, as for immune cells, mosaicism is a plausible route to neuron functional diversification.
GABAergic neurons can be activated after spikes fired at principal neurons via a feedback route [14], [15], [16], [24], which falls into the phase of pyramidal afterhyperpolarization (AHP).
To achieve widespread and selective expression of the ADAR2 gene in motor neurons through a peripheral route avoiding off-target delivery, we used a viral vector AAV9 and the neuron-specific SYNI promoter.
Migration is, for the most part, complete by birth, with exception of the RMS; the migration route that neurons in the RMS take to reach the olfactory bulb will not be discussed in this review.
The work described above offers the following insights into the prospect of the small-molecule botulism therapy, although additional studies are needed to determine if the observed protection of mice against BoNTA by the pre-treatment of F4H, H3H, or F3A involves inhibition and clearance of extracellular toxin depots, uptake by intoxicated neurons, or both routes.
