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construct
M_EN2_1_HD_KO_HM
Model Details
Change
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Phenotypic Profile
Category Entity Quantity Experimental Paradigm Age at Testing
Motor phenotype Motor coordination and balance2
Abnormal
Description: Abnormal muscle coordination
Exp Paradigm: Rota-rod test

Accelerating rotarod test P21-p27
Neuroanatomy / Ultrastructure / Cytoarchitecture Cerebellar morphology5
Decreased
Description: Abnormal location of boundary between anterior and posterior cerebellum at the base of intercrural fissure between vi and vii lobes and abnormal staining pattern in 4 regions of cerebellum: crus i, crus ii, paramedial lobe, paraflocculus, and lobe viii & ix
Exp Paradigm: Detection of lacz expression under en-2 enhancer and promoter restricted to granular and molecular layers

Histology Unreported
Neuroanatomy / Ultrastructure / Cytoarchitecture Brain morphology5
Decreased
Description: Decreased cerebellar anlage size; decreased extent of fusion of cerebellar rudiments; decreased size of cerebellum and colliculi
Exp Paradigm: Dissection and histological analysis

Histology E13.5-e16.5
Neuroanatomy / Ultrastructure / Cytoarchitecture Neuronal number: interneurons4
Decreased
Description: Decreased number of pv and som interneurons in layers ii-iii of somatosensory cortex
Exp Paradigm: Pv, sst

In situ hybridization (ish) 3-5 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Cerebellar foliation5
Decreased
Description: Delayed fissure formation; absence of ansoparamedial fissure
Exp Paradigm: Comparison of saggital sections of cerebellum

Histology P0- p7
Neuroanatomy / Ultrastructure / Cytoarchitecture Neuronal number: interneurons4
Decreased
Description: Decreased number of neuropeptide y, somatostatin, parvalbumin-positive interneurons in the hilus
Exp Paradigm: Npy, sst, pv

Immunohistochemistry 3-5 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Cerebellar foliation5
Decreased
Description: Abnormal fissure formation; developmental delay; abnormal development of posterior fissure 2/py; abnormal ixth lobe shape and size; no change in anterior region of cerebellum
Exp Paradigm: Analysis of mid-line sagittal cresyl-violet stained sections

Histology P0-p9
Neuroanatomy / Ultrastructure / Cytoarchitecture Hippocampal morphology3
Abnormal
Description: Abnormal pyramidal cell layer and mossy fiber pathway; cell loss and tissue sclerosis; increased npy immnoreactivity in mossy fibers of dentate gyrus
Exp Paradigm: Immunostainig for pan-neuronal marker neun; npy immunohistochemistry

Immunohistochemistry Unreported
Neuroanatomy / Ultrastructure / Cytoarchitecture Brain morphology1
Decreased
Description: Decreased cerebellar size, both rostro-caudally and in the mediolateral expansion; abnormal foliation with abnormal fissure pattern, altered branching pattern, and decreased extent of the lobules
Exp Paradigm: Microscopic examination of brain

Histology 8 weeks
Neurophysiology Neurotransmitter release: serotonin2
Increased
Description: Increased levels of serotonin, 5-hydroxyindolacetic acid in cerebellum; no change in level in hippocampus, striatum, and frontal cortex
Exp Paradigm: Hplc-electrochemical detection

High-performance liquid chromatography (hplc) 3 months
Repetitive behavior Self grooming: perseveration2
Increased
Description: Increased self grooming behavior
Exp Paradigm: General observations

General observations 3-4 months
Seizure Seizure threshold3
Increased
Description: Increased susceptibility to kainic acid induced seizures with progression to severe tonic-clonic seizures
Exp Paradigm: Response to 20 mg/kg dose of kainic acid injection

Observation of chemically induced seizures Unreported
Social behavior Aggression2
Decreased
Description: Decreased aggressive behavior; decrease in number of attacks to an intruder mouse
Exp Paradigm: Resident intruder test

Resident-intruder test 4-5 months
Social behavior Juvenile play2
Decreased
Description: Decreased juvenile play, like chasing, pushing under, crawling over the partner, social sniffing, and allogrooming
Exp Paradigm: General observations

General observations 4-6 weeks
Emotion Exploratory activity2
Decreased
Description: Decreased exploratory behavior
Exp Paradigm: Modified open-field with objects

Open field test 3-4 months
Learning & memory Spatial learning2
Decreased
Description: Decreased spatial learning; deficit in performance of hidden platform taks; longer escape latency
Exp Paradigm: Hidden platform test for spatial memory and navigation.

Morris water maze test Unreported
Molecular profile Marker expression3
Decreased
Description: Reduced expression of gabaergic markers, parvalbumin and somatostatin in ca3 pyramidal layer and stratum lcunosum moleculare
Exp Paradigm: Gabaergic marker expression

Immunohistochemistry Unreported
Molecular profile Gene expression3
Decreased
Description: Decreased levels in hippocampus and cerebral cortex; increased levels in ventral midbrain and cerebellum
Exp Paradigm: En2 mrna expression

Quantitative pcr (qrt-pcr) Unreported
Molecular profile Marker expression4
Decreased
Description: Decreased mrna expression in somatosensory cortex of pv, npy, and som
Exp Paradigm: Gabaergic marker expression

Quantitative pcr (qrt-pcr) 3-5 months
Molecular profile Marker expression4
Decreased
Description: Decreased expression of npy, pv, and som mrna
Exp Paradigm: Gabaergic marker expression

Quantitative pcr (qrt-pcr) 3-5 months
Molecular profile Protein expression level evidence1
Decreased
Description: Decreased en2 protein expression
Exp Paradigm: En2 protein expression

Western blot P9.5
Molecular profile Gene expression3
Increased
Description: Increased c-fos and c-jun, immediate early genes, mrna in layers 2-3 and 5-6
Exp Paradigm: Immediate early gene (ieg) induction

In situ hybridization (ish) Unreported
Developmental profile General characteristics3 No change General observations Unreported
Developmental profile General characteristics1 No change General observations Unreported
Molecular profile Marker expression4 No change Quantitative pcr (qrt-pcr) 3-5 months
Molecular profile Marker expression4 No change Quantitative pcr (qrt-pcr) 3-5 months
Molecular profile Protein expression level evidence1 No change Western blot P8.5, p9.5
Motor phenotype General locomotor activity2 No change Open field test 3-4 weeks
Motor phenotype Motor coordination and balance1 No change Accelerating rotarod test Unreported
Motor phenotype Negative geotaxis2 No change Negative geotaxis test 3-4 weeks
Motor phenotype Righting response1 No change Righting reflex test Unreported
Motor phenotype Righting response2 No change Righting reflex test 3-4 weeks
Motor phenotype Swimming ability1 No change Swim test Unreported
Neuroanatomy / Ultrastructure / Cytoarchitecture Brain anatomy1 No change Microscopic analysis P8, p9, p12
Neuroanatomy / Ultrastructure / Cytoarchitecture Brain morphology5 No change Histology E17.5
Neuroanatomy / Ultrastructure / Cytoarchitecture Brain morphology1 No change Histology 2 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Hippocampal morphology4 No change Photomicrographic analysis 3-5 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Neuronal number: interneurons4 No change Immunohistochemistry 3-5 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Neuronal number: interneurons4 No change In situ hybridization (ish) 3-5 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Neuronal number: interneurons4 No change In situ hybridization (ish) 3-5 months
Neuroanatomy / Ultrastructure / Cytoarchitecture Somatosensory cortical map architecture4 No change Immunohistochemistry 3-5 months
Sensory Vision2 No change Morris water maze test Unreported
Not Reported: Circadian sleep/wake cycle,  Communications,  Developmental profile,  Emotion,  Immune response,  Learning & memory,  Maternal behavior,  Molecular profile,  Motor phenotype,  Neuroanatomy / ultrastructure / cytoarchitecture,  Neurophysiology,  Physiological parameters,  Repetitive behavior,  Seizure,  Sensory,  Social behavior,  
 
References: 1: Joyner AL , et al. 1991 , 2: Cheh MA , et al. 2006 , 3: Tripathi PP , et al. 2009 , 4: Sgad P , et al. 2013 , 5:  Millen KJ , et al. 1994
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