Phenotypes Associated with This Genotype

Genotype
MGI:3764818

• Allelic Composition: Tg(Th-SNCA*)1.2Ccs/?
• Genetic Background: involves: C57BL/6

• ♀: phenotype observed in females
• ♂: phenotype observed in males
• N: normal phenotype

nervous system

nervous system phenotype ( J:127707 , J:127708 )

N • mice exhibit normal brain and spinal cord morphology, and normal dopaminergic neurons and axons, cell death or micro- and astrogliosis in the substantia nigra, striatum, locus coeruleus and cerebral cortex (J:127707)

N • mice exhibit normal susbstantia nigra compacta (J:127708)

brain vacuoles ( J:127707 )

• in old-aged mice, neurons display cytoplasmic vacuoles and disruptions in the Golgi network and endoplasmic reticulum

abnormal CNS glial cell morphology ( J:168847 )

• almost all mesencephalic glial cell types exhibit a higher number of structurally altered mitochondria

• mitochondrial alterations are higher in oligodendrocytes than in astrocytes or microglia

• mesencephalic glial cells exhibit a higher percentage of damaged mitochondria than in mesencephalic neurons at 3 and 12-15 months of age

abnormal neuron morphology ( J:127707 )

• in aged mice, neurons display cytoplasmic vacuoles, disruptions in the Golgi network and endoplasmic reticulum, occasionally detached outer nuclear membrane, and mitochondria abnormalities including electron dense inclusion bodies, dilated and disorganized cristae and protrusions

abnormal astrocyte physiology ( J:168847 )

• astrocytes exhibit reduced mitochondrial calcium storage capacity

cellular

abnormal mitochondrial morphology ( J:127707 , J:127708 , J:168847 )

• the number of damaged mitochondria in the substantia nigra is increased 340% compared to in wild-type mice (J:127707)

• however, the number of mitochondria in affected brains is normal and no mitochondrial swelling is observed (J:127707)

• almost all mesencephalic glial cell types exhibit a higher number of structurally altered mitochondria, showing disintegration and reduction of mitochondrial cristae, mitochondrial enlargement and formation of protrusions or disruption of the outer membrane (J:168847)

abnormal mitochondrial physiology ( J:168847 )

• astrocytes exhibit reduced mitochondrial calcium storage capacity

Mouse Models of Human Disease		DO ID	OMIM ID(s)	Ref(s)
Parkinson's disease		DOID:14330	OMIM:PS168600	J:168847