Abnormal expression of synaptic proteins and neurotrophin-3 in the down syndrome mouse model Ts65Dn

G. Pollonini, V. Gao, A. Rabe, S. Palminiello, G. Albertini, C. M. Alberini

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Down syndrome (DS) results from triplication of the whole or distal part of human chromosome 21. Persons with DS suffer from deficits in learning and memory and cognitive functions in general, and, starting from early development, their brains show dendritic and spine structural alterations and cell loss. These defects concern many cortical brain regions as well as the hippocampus, which is known to play a critical role in memory and cognition. Most of these abnormalities are reproduced in the mouse model Ts65Dn, which is partially trisomic for the mouse chromosome 16 that is homologous to a portion of human chromosome 21. Thus, Ts65Dn is widely utilized as an animal model of DS. To better understand the molecular defects underlying the cognitive and particularly the memory impairments of DS, we investigated whether the expression of several molecules known to play critical roles in long-term synaptic plasticity and long-term memory in a variety of species is dysregulated in either the neonatal brain or adult hippocampus of Ts65Dn mice. We found abnormal expression of the synaptic proteins synaptophysin, microtubule-associated protein 2 (MAP2) and cyclin-dependent kinase 5 (CDK5) and of the neurotrophin-3 (NT-3). Both the neonatal brain and adult hippocampus revealed significant abnormalities. These results suggest that a dysregulation in the expression of neurotrophins as well as proteins involved in synaptic development and plasticity may play a potential role in the neural pathology of DS in humans.

Original languageEnglish
Pages (from-to)99-106
Number of pages8
JournalNeuroscience
Volume156
Issue number1
DOIs
Publication statusPublished - Sep 22 2008

Fingerprint

Neurotrophin 3
Down Syndrome
Chromosomes, Human, Pair 21
Hippocampus
Neuronal Plasticity
Brain
Human Chromosomes
Proteins
Cognition
Cyclin-Dependent Kinase 5
Chromosomes, Human, Pair 16
Dendritic Spines
Synaptophysin
Microtubule-Associated Proteins
Long-Term Memory
Nerve Growth Factors
Animal Models
Learning
Pathology

Keywords

  • Down syndrome
  • memory
  • neurotrophin
  • plasticity
  • synaptic protein
  • Ts65Dn

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Pollonini, G., Gao, V., Rabe, A., Palminiello, S., Albertini, G., & Alberini, C. M. (2008). Abnormal expression of synaptic proteins and neurotrophin-3 in the down syndrome mouse model Ts65Dn. Neuroscience, 156(1), 99-106. https://doi.org/10.1016/j.neuroscience.2008.07.025

Abnormal expression of synaptic proteins and neurotrophin-3 in the down syndrome mouse model Ts65Dn. / Pollonini, G.; Gao, V.; Rabe, A.; Palminiello, S.; Albertini, G.; Alberini, C. M.

In: Neuroscience, Vol. 156, No. 1, 22.09.2008, p. 99-106.

Research output: Contribution to journalArticle

Pollonini, G, Gao, V, Rabe, A, Palminiello, S, Albertini, G & Alberini, CM 2008, 'Abnormal expression of synaptic proteins and neurotrophin-3 in the down syndrome mouse model Ts65Dn', Neuroscience, vol. 156, no. 1, pp. 99-106. https://doi.org/10.1016/j.neuroscience.2008.07.025
Pollonini, G. ; Gao, V. ; Rabe, A. ; Palminiello, S. ; Albertini, G. ; Alberini, C. M. / Abnormal expression of synaptic proteins and neurotrophin-3 in the down syndrome mouse model Ts65Dn. In: Neuroscience. 2008 ; Vol. 156, No. 1. pp. 99-106.
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