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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Etv1tm1Tmj
targeted mutation 1, Thomas M Jessell
MGI:2384493
Summary 7 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Etv1tm1Tmj/Etv1tm1Tmj involves: 129S1/Sv MGI:3621015
hm2
Etv1tm1Tmj/Etv1tm1Tmj involves: 129S1/Sv * C57BL/6J MGI:3621013
ht3
Etv1tm1Tmj/Etv1+ involves: 129S1/Sv MGI:3621017
cn4
Etv1tm1Tmj/Etv1tm1Tmj
Ntf3tm2Jae/Ntf3tm2Jae
Tg(PLAT-cre)116Sdu/0
involves: 129S1/Sv MGI:5506528
cx5
Etv1tm1Tmj/Etv1tm2Tmj
Tg(EGR3-WGA)1Tmj/0
involves: 129S1/Sv MGI:5506525
cx6
Etv1tm1Tmj/Etv1tm1Tmj
Etv4tm1Arbr/Etv4+
involves: 129S1/Sv MGI:5506526
cx7
Etv1tm1Tmj/Etv1tm1Tmj
Ntf3tm1Lfr/Ntf3tm1Lfr
involves: 129S1/Sv * 129S2/SvPas MGI:3621022


Genotype
MGI:3621015
hm1
Allelic
Composition
Etv1tm1Tmj/Etv1tm1Tmj
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etv1tm1Tmj mutation (0 available); any Etv1 mutation (44 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• myelinated nerve fibers in the soleus and medial gastrocnemius are decreased by 12-13% compared to wild-type
• the interosseous nerve is present at E16.5 but absent after birth
• golgi tendon organ numbers are decreased in the soleus (by 77%), medial gastrocnemius (by 64%), and extensor hallucis longus (by 26%)
• in some cases the soleus lacks golgi tendon organs
• spindle density is increased in dorsal and to a lesser extent in ventral crural muscles
• at P20-22, average spindle number is increased by 57% in the soleus, by 80% in the medial gastrocnemius, and by 26% in the extensor hallucis longus
• however, spindle numbers are decreased in proximal hindlimb muscles with dorsal muscles more severely affected than ventral muscles resulting in an overall decrease in spindle density in the hindlimbs
• about 69% of spindles contain fewer than the normal 4 intrafusal fibers and these spindles also have a shorter capsule and smaller periaxial fluid space
• the missing intrafusal fibers are generally the later forming chain fibers
• the proprioceptive branch of the soleus muscle nerve has 12% fewer myelinated fibers, innervates more spindles and fewer golgi tendon organs, and contains more group Ia afferents and fewer group Ib afferents
• absent from the crus at E16.5 - E18.5 and P0 - P1
• fewer dorsal root ganglion neurons and axonal projections express calbindin 2 (J:75311)
• about a 14% and 23% decrease in neuron numbers are seen in the L4 and L3 dorsal root ganglia, respectively (J:75311)
• a 25% and 32% decrease in myelinated nerve fiber numbers are seen in the L4 and L3 dorsal root ganglia, respectively (J:75311)
• only 0.2% of 9400 neuron profiles show calbindin 2 expression compared to 5.6% of 700 neuron profiles in wild-type mice (J:107207)
• both L3 and L4 ventral spinal roots contain fewer small caliber motor axons (19% of the myelinated axon population) compared to wild-type mice (38% of the myelinated axon population)

muscle
• golgi tendon organ numbers are decreased in the soleus (by 77%), medial gastrocnemius (by 64%), and extensor hallucis longus (by 26%)
• in some cases the soleus lacks golgi tendon organs
• spindle density is increased in dorsal and to a lesser extent in ventral crural muscles
• at P20-22, average spindle number is increased by 57% in the soleus, by 80% in the medial gastrocnemius, and by 26% in the extensor hallucis longus
• however, spindle numbers are decreased in proximal hindlimb muscles with dorsal muscles more severely affected than ventral muscles resulting in an overall decrease in spindle density in the hindlimbs
• about 69% of spindles contain fewer than the normal 4 intrafusal fibers and these spindles also have a shorter capsule and smaller periaxial fluid space
• the missing intrafusal fibers are generally the later forming chain fibers




Genotype
MGI:3621013
hm2
Allelic
Composition
Etv1tm1Tmj/Etv1tm1Tmj
Genetic
Background
involves: 129S1/Sv * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etv1tm1Tmj mutation (0 available); any Etv1 mutation (44 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• die between 3 and 5 weeks of age

nervous system
• between E18 and P5 impaired muscle spindle differentiation is seen with loss of differentiated intrafusal fibers
• loss of differentiated intrafusal fibers varies between muscles with nearly complete loss in the gluteus, gracilis, biceps femoris, and semitendinosus muscles and partial loss in the pectoralis, adductor, and rectus femoris
• however, no defects in Golgi tendon organs are detected
• fewer than 1% of the normal number of proprioceptive group 1a afferents are found in the ventral termination zone in the dorsal spinal cord; however densities in the dorsal and intermediate zones are normal
• a similar defect is seen at the forelimb and thoracic levels
• the number of PV+ axons within the muscle mass is reduced
• after stimulation of the dorsal root ganglia monosynaptic responses are about 10 less than in wild-type and fail to evoke action potentials in motor neurons; however long-latency polysynaptic responses are similar to wild-type
• after cutaneous nerve stimulation the amplitude of monosynaptic responses is reduced between 4- and 40-fold
• at P6 to P8, the latency of the fast component of compound sensory action potentials in the dorsal root ganglia is increased by 1 to 2 ms with a few axons showing even slower conduction velocities

behavior/neurological
• limb ataxia
• abnormal flexor-extensor posturing of the limbs

muscle
• between E18 and P5 impaired muscle spindle differentiation is seen with loss of differentiated intrafusal fibers
• loss of differentiated intrafusal fibers varies between muscles with nearly complete loss in the gluteus, gracilis, biceps femoris, and semitendinosus muscles and partial loss in the pectoralis, adductor, and rectus femoris
• however, no defects in Golgi tendon organs are detected




Genotype
MGI:3621017
ht3
Allelic
Composition
Etv1tm1Tmj/Etv1+
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etv1tm1Tmj mutation (0 available); any Etv1 mutation (44 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• distal hindlimb muscles show a 20-25% decrease in golgi tendon organ numbers
• distal hindlimb muscles show a 20-30% increase in spindle numbers
• 15-17% decrease in pacinian corpuscle numbers in the crus at P0-P1
• remaining corpuscles are smaller than wild-type but structurally similar
• about a 11% and 13% decrease in neuron numbers are seen in the L4 and L3 dorsal root ganglia, respectively

growth/size/body
• slightly smaller through the first 3 weeks of life

muscle
• distal hindlimb muscles show a 20-25% decrease in golgi tendon organ numbers
• distal hindlimb muscles show a 20-30% increase in spindle numbers




Genotype
MGI:5506528
cn4
Allelic
Composition
Etv1tm1Tmj/Etv1tm1Tmj
Ntf3tm2Jae/Ntf3tm2Jae
Tg(PLAT-cre)116Sdu/0
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etv1tm1Tmj mutation (0 available); any Etv1 mutation (44 available)
Ntf3tm2Jae mutation (1 available); any Ntf3 mutation (24 available)
Tg(PLAT-cre)116Sdu mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• no further reduction in proprioceptive sensory neuron survival is observed (with deletion of Ntf3); numbers in L5 DRG are reduced similarly to that observed in Etv1-deficient, Ntf3-sufficient animals




Genotype
MGI:5506525
cx5
Allelic
Composition
Etv1tm1Tmj/Etv1tm2Tmj
Tg(EGR3-WGA)1Tmj/0
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etv1tm1Tmj mutation (0 available); any Etv1 mutation (44 available)
Etv1tm2Tmj mutation (0 available); any Etv1 mutation (44 available)
Tg(EGR3-WGA)1Tmj mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
muscle
• mutants exhibit loss of about 65% of WGA-positive muscle spindles relative to controls

nervous system
• mutants exhibit loss of about 65% of WGA-positive muscle spindles relative to controls
• number of wheat germ agglutinin-positive (WGA) proprioceptive sensory neurons in L2 and L5 DRG is significantly reduced (to 20% of control)




Genotype
MGI:5506526
cx6
Allelic
Composition
Etv1tm1Tmj/Etv1tm1Tmj
Etv4tm1Arbr/Etv4+
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etv1tm1Tmj mutation (0 available); any Etv1 mutation (44 available)
Etv4tm1Arbr mutation (0 available); any Etv4 mutation (41 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• hypaxial (body wall and intercostal) muscles lack Etv4-positive muscle spindles while axial muscles have 14% of muscle spindles relative to control; hindlimb muscles retain about 50% of Etv4-positive muscle spindles
• hypaxial (body wall and intercostal) muscles lack vGlut1 (Slc17a7)-positive spindle-associated sensory endings (SSEs) at P0-3 while axial muscles retain about 3%; hindlimb muscles retain about 50% of Slc17a7-positive SSEs
• significant muscle to muscle variation in proprioceptive sensory neuron innervation is observed

muscle
• hypaxial (body wall and intercostal) muscles lack Etv4-positive muscle spindles while axial muscles have 14% of muscle spindles relative to control; hindlimb muscles retain about 50% of Etv4-positive muscle spindles




Genotype
MGI:3621022
cx7
Allelic
Composition
Etv1tm1Tmj/Etv1tm1Tmj
Ntf3tm1Lfr/Ntf3tm1Lfr
Genetic
Background
involves: 129S1/Sv * 129S2/SvPas
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Etv1tm1Tmj mutation (0 available); any Etv1 mutation (44 available)
Ntf3tm1Lfr mutation (1 available); any Ntf3 mutation (24 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• absent from proximal and distal muscles in newborn double homozygotes
• spindles are absent from proximal and distal muscles in newborn double homozygotes

muscle
• absent from proximal and distal muscles in newborn double homozygotes
• spindles are absent from proximal and distal muscles in newborn double homozygotes





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last database update
11/12/2024
MGI 6.24
The Jackson Laboratory