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Phenotypes Associated with This Genotype
Genotype
MGI:3785825
Allelic
Composition
Smn1tm1Msd/Smn1tm1Msd
Grm7Tg(SMN2)89Ahmb/Grm7Tg(SMN2)89Ahmb
Tg(SMN2*delta7)4299Ahmb/Tg(SMN2*delta7)4299Ahmb
Genetic
Background
FVB.Cg-Grm7Tg(SMN2)89Ahmb Smn1tm1Msd Tg(SMN2*delta7)4299Ahmb
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grm7Tg(SMN2)89Ahmb mutation (35 available); any Grm7 mutation (123 available)
Smn1tm1Msd mutation (37 available); any Smn1 mutation (86 available)
Tg(SMN2*delta7)4299Ahmb mutation (13 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice do not survive past 17 days with a mean survival of 13 days

behavior/neurological
• by day 10, mice experience difficulty walking and often fall while walking unlike wild-type mice
• by day 10, mice experience difficulty walking and often fall while walking unlike wild-type mice
• at P10, mice exhibit abnormal gait with fibrillation of the hindlimbs

nervous system
• in the lumbar region of the spinal cord at P9
• however, spinal motor neuron numbers at P4 are normal
• at P14, many neuromuscular junctions are partially innervated or not innervated
• the diameter of neuromuscular junctions is smaller than in wild-type mice

muscle
• at P14, muscle fibers of the gastrocnemius are small due to atrophy

growth/size/body

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
Werdnig-Hoffmann disease DOID:13137 OMIM:253300
J:97103


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
03/12/2024
MGI 6.23
The Jackson Laboratory