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The PRRT2 knockout mouse recapitulates the neurological diseases associated with PRRT2 mutations
Caterina Michetti1, Enrico Castroflorio2, Ivan Marchionni1
1Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, 16132 Genova, Italy.
Neurobiology of Disease
|December 24, 2016
Summary
Mutations in the Proline-Rich Transmembrane protein 2 (PRRT2) gene cause paroxysmal disorders. A PRRT2 knockout mouse model exhibits motor deficits, aiding research into PRRT2-related diseases.
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Mutations in Proline-Rich Transmembrane protein 2 (PRRT2) are linked to paroxysmal neurological disorders.
- PRRT2 plays a crucial role in neurotransmitter release, brain development, and synapse formation.
Purpose of the Study:
- To characterize the phenotype of a constitutively PRRT2-inactivated (PRRT2 KO) mouse.
- To establish a PRRT2 KO mouse as a model for studying PRRT2-related human pathologies.
Main Methods:
- Generated PRRT2 KO mice.
- Utilized β-galactosidase staining to map PRRT2 expression.
- Performed behavioral analyses, including response to audiogenic stimuli and pentylentetrazol.
- Conducted patch-clamp electrophysiology on hippocampal and cerebellar slices.
Main Results:
- PRRT2 KO mice exhibited paroxysmal movements and abnormal motor behaviors like wild running and jumping.
- These mice showed increased sensitivity to pentylentetrazol-induced seizures.
- Cerebellar slices revealed enhanced excitatory strength at parallel fiber-Purkinje cell synapses.
Conclusions:
- The PRRT2 KO mouse model recapitulates motor paroxysms observed in human PRRT2-linked disorders.
- This model is valuable for investigating disease pathogenesis and evaluating therapeutic strategies for PRRT2-related conditions.
