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Intersectin 1 contributes to phenotypes in vivo: implications for Down's syndrome.
Michael P Hunter1, Marianela Nelson, Michael Kurzer
1Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, USA.
Neuroreport
|August 31, 2011
Summary
Intersectin 1 (ITSN1) protein levels are elevated in Down
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Intersectin 1 (ITSN1) is a scaffold protein encoded by a human chromosome 21 (HSA21) gene.
- ITSN1 plays roles in endocytosis and signal transduction.
- ITSN1 is implicated in neurodegenerative diseases like Down's syndrome and Alzheimer's disease.
Purpose of the Study:
- To investigate ITSN1 protein levels in individuals with Down's syndrome.
- To explore the impact of ITSN1 overexpression on behavior using a transgenic mouse model.
Main Methods:
- Quantification of ITSN1 protein levels in human samples.
- Analysis of a novel ITSN1 transgenic mouse model.
- Behavioral assessment of transgenic mice.
Main Results:
- ITSN1 proteins were elevated in individuals with Down's syndrome.
- A decrease in ITSN1 levels was observed in aged Down's syndrome cases with Alzheimer's-like pathology.
- ITSN1 overexpression in mice led to sex-dependent decreases in locomotor activity.
Conclusions:
- ITSN1 protein levels are altered in Down's syndrome and may be linked to Alzheimer's disease pathology.
- ITSN1 isoforms and their overexpression are associated with specific behavioral phenotypes.
- Findings suggest a role for ITSN1 in neurodegenerative disease pathogenesis and offer potential therapeutic targets.
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