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M_NLGN3_16_KO_HM_REINSTATE-PURKINJEN
Model Details
Change
No Change
     
Phenotypic Profile
Category Entity Quantity Experimental Paradigm Age at Testing
Motor phenotype Motor coordination and balance1
Restored
Description: Reexpression of nlgn3 specifically in purkinje cells restored motor coordination compared to controls measured by the decreased step time but the number of missteps remained high.
Exp Paradigm: Number of runs, missteps and step time was measured.

Erasmus ladder test 2-3 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Neuroreceptor levels: glutamate receptors: nmda receptors1
No adverse effect
Description: Reexpression of nlgn3 specifically in purkinje cells did not alter the expression of glud2 or glua2/a3 compared to mutants.
Exp Paradigm: NA

Western blot 2-3 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Anatomical projections and connectivity1
Restored
Description: Reexpression of nlgn3 specifically in purkinje cells suppressed ectopic synapse formation in the distal molecular layer, compared to controls.
Exp Paradigm: Vglut2 positive synapses were counted on purkinje cells and climbing fibers.

Histology 2-3 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Neuroreceptor levels: glutamate receptors: nmda receptors1
Restored
Description: Reexpression of nlgn3 specifically in purkinje cells reduced the mglur1a protein level and its synaptic abundance to the wild-type levels.
Exp Paradigm: Western blot

Western blot 2-3 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Neuroreceptor levels: glutamate receptors: nmda receptors1
Restored
Description: Reexpression of nlgn3 specifically in purkinje cells reduced the mglur1a protein level and its synaptic abundance to the wild-type levels.
Exp Paradigm: Quantitative pcr (qrt-pcr)

Quantitative pcr (qrt-pcr) 2-3 months
Molecular profile Protein expression level evidence1
No adverse effect
Description: Reexpression of nlgn3 specifically in purkinje cells did not alter the expression of homer1 compared to mutants.
Exp Paradigm: Western blot

Western blot 2-3 months
Molecular profile Targeted expression1
Restored
Description: Reexpression of nlgn3 specifically in purkinje cells increased nlgn3 protein expression in purkinjee cell dendrites in the cerebellum but not in the inner granular layer, compared to mutants. the reexpression of nlgn3 in pcs exceeds the endogenous nlgn3 expression level and results in a gain-of-function phenotype.
Exp Paradigm: Calbindin is used to co-stain for dendrite identification.- histology

Histology 2-3 months
Molecular profile Protein expression level evidence1
No adverse effect
Description: Reexpression of nlgn3 specifically in purkinje cells did not alter the expression of homer1 compared to mutants.
Exp Paradigm: Histology

Histology 2-3 months
Molecular profile Protein phosphorylation1
Restored
Description: Reexpression of nlgn3 specifically in purkinje cells returned dhpg-induced phospho-glua2 signals to wildtype control levels.
Exp Paradigm: Dhpg, a potent agonist of group i metabotropic glutamate receptors mglur1 and mglur5, is used in a functional assay.

Western blot 3-4 weeks
Molecular profile Protein localization: synapse1
Restored
Description: Reexpression of nlgn3 specifically in purkinje cells localizes the nlgn3 protein to vglut1 positive purkinje fiber boutons where nlgn3 protein colocalizes with mglur1alpha in calbindin positive spines and in glomeruli, nlgn3 localizes at psd95 positive and gaba-a receptor a2 positive synapses and colocalizes with gfp+ terminals in glyt2-gfp transgenic mice, compared to mutants.
Exp Paradigm: Calbindin is used to co-stain for dendrite identification.

Histology 2-3 months
Molecular profile Targeted expression1
Restored
Description: Reexpression of nlgn3 specifically in purkinje cells increased nlgn3 protein expression in purkinjee cell dendrites in the cerebellum but not in the inner granular layer, compared to mutants. the reexpression of nlgn3 in pcs exceeds the endogenous nlgn3 expression level and results in a gain-of-function phenotype.
Exp Paradigm: Calbindin is used to co-stain for dendrite identification.-western blot

Western blot 2-3 months
Not Reported: Circadian sleep/wake cycle,  Communications,  Developmental profile,  Emotion,  Immune response,  Learning & memory,  Maternal behavior,  Neurophysiology,  Physiological parameters,  Repetitive behavior,  Seizure,  Sensory,  Social behavior,  
 
References: 1:  Baudouin SJ , et al. 2012
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