title: Time window in cholinomimetic ability to rescue long-term potentiation in neurodegenerating anti-nerve growth factor mice.
abstract: A deficit in cortical cholinergic synaptic transmission is a common feature of cognitive and behavioral impairment observed in neurodegenerative pathologies. AD11 transgenic mice producing blocking antibodies against Nerve Growth Factor (NGF) are characterized by a progressive neurodegenerative phenotype defined by the deposition of amyloid peptide, intracellular neurofibrillary tangles and by a marked cholinergic depletion. We exploited AD11 mice to develop a functional assay to investigate the impact of cholinergic deficit on cortical synaptic plasticity impairment at different neurodegenerative stages. In particular, we investigated the time course of long-term potentiation (LTP) impairment in neocortex of AD11 mice and potential rescue by acute pharmacological treatment with Acetylcholine (ACh) or the cholinergic agonist Galantamine (GAL). We showed that LTP starts being absent in AD11 mice at 2 months, an age corresponding to early neurodegenerative stage characterized by the first observed decrease in number of basal forebrain cholinergic neurons (BFCNs) without overt cortical neurodegeneration. We demonstrated that acute ACh or GAL treatment fully reverts LTP impairment in 2 month old AD11 mice. In contrast, cholinergic treatment failed to recover synaptic plasticity deficit in aged (9-10 months) AD11 mice characterized by a severe cortical neurodegeneration.
authors.affiliation: SISSA (International School for Advanced Studies), via Beirut 2-4, 34014 Trieste, Italy.
authors.forename: Nicola
authors.initials: N
authors.lastname: Origlia
authors.forename: Simona
authors.initials: S
authors.lastname: Capsoni
authors.forename: Luciano
authors.initials: L
authors.lastname: Domenici
authors.forename: Antonino
authors.initials: A
authors.lastname: Cattaneo
mesh_terms: D000109:Acetylcholine / Q000502:physiology*; D000818:Animals; D018679:Cholinergic Agonists / Q000494:pharmacology*; D005702:Galantamine / Q000494:pharmacology; D017774:Long-Term Potentiation / Q000187:drug effects / Q000235:genetics*; D051379:Mice; D008822:Mice, Transgenic; D009410:Nerve Degeneration / Q000235:genetics* / Q000378:metabolism*; D020932:Nerve Growth Factor / Q000037:antagonists & inhibitors* / Q000235:genetics* / Q000378:metabolism; D009473:Neuronal Plasticity / Q000187:drug effects / Q000235:genetics; D013997:Time Factors
chemical_list: D018679:Cholinergic Agonists; D005702:Galantamine; D020932:Nerve Growth Factor; D000109:Acetylcholine