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N/A, Neurodegeneration leads to Neuronal network function, Decreased
Key Event Relationship Overview
AOPs Referencing Relationship
Life Stage Applicability
Key Event Relationship Description
Evidence Collection Strategy
Evidence Supporting this KER
Based on neuropathological findings and neuroimaging from patients suffering from neurodegeneration as well as from evidence derived by transgenic animal models of neurodegeneration, it has been suggested that neurodegeneration is relate to neural network dysfunction (Palop et al., 2007; Seeley et al., 2009). Neurodegeneration leads to impairment of retrograde axonal transport that prohibits the growth factor supply to long-range projection neurons, causing synapse loss, and post-synaptic dendrite retraction that lead to decrease of neuronal network (Seeley et al., 2009).
Uncertainties and Inconsistencies
Administration of high dose DA (4.4 mg/kg) to adult male Sprague-Dawley rats causes elevation of electrocorticogram (ECoG) beginning 30 min post injection, whereas at low dose (2.2 mg/kg) ECoG becomes elevated after 110 min (Binienda et al., 2011).
Known modulating factors
Known Feedforward/Feedback loops influencing this KER
Domain of Applicability
It has been shown at the neuromascular junction of D. melanogaster that quisqualate-type glutamate receptors are blocked by DA (1 mM) (Lee et al., 2009). However, in crayfish (Procambarus clarkia) the same concentration of DA has no effect in spike activity (Bierbower and Cooper, 2013).
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Palop JJ, Chin J, Roberson ED, Wang J, Thwin MT, Bien-Ly N, Yoo J, Ho KO, Yu GQ, Kreitzer A, et al. Aberrant excitatory neuronal activity and compensatory remodeling of inhibitory hippocampal circuits in mouse models of Alzheimer's disease. Neuron. 2007. 55: 697-711.
Qiu S, Jebelli AK, Ashe JH, Currás-Collazo MC. Domoic acid induces a long-lasting enhancement of CA1 field responses and impairs tetanus-induced long-term potentiation in rat hippocampal slices. Toxicol Sci. 2009. 111:140-150.
Seeley WW, Crawford RK, Zhou J, Miller BL, Greicius MD. Neurodegenerative diseases target large-scale human brain networks. Neuron. 2009. 62:42-52.