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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 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
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
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 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
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
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 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
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
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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