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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Mycntm1Par
targeted mutation 1, Luis Parada
MGI:1857492
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Mycntm1Par/Mycntm1Par involves: 129S2/SvPas * C57BL/6J MGI:3620015
ht2
Mycntm1Par/Mycn+ involves: 129S2/SvPas * C57BL/6J MGI:3620014
ht3
Mycntm1Jrt/Mycntm1Par involves: 129S2/SvPas * C57BL/6J MGI:3620016


Genotype
MGI:3620015
hm1
Allelic
Composition
Mycntm1Par/Mycntm1Par
Genetic
Background
involves: 129S2/SvPas * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mycntm1Par mutation (1 available); any Mycn mutation (25 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• homozygotes die at ~E11.5
• by E12.5, homozygotes appear highly necrotic and pale (presumably due to anemia) and show no signs of life

nervous system
• at E9.5, homozygotes exhibit a wavy neuroepithelium and an aberrant ectodermal surface
• by E11.5, the neuroepithelium is thin and lacks architectural complexity
• at E9.5, homozygotes display an abnormal prosencephalon
• at E9.5, homozygotes display an abnormal roof plate in the myelencephalon
• at E11.5, homozygotes display hypoplastic telencephalic structures
• by E11.5, cranial ganglia are generally reduced, with a mitotic rate of less than 25% of wild-type
• by E11.5, homozygotes display lack of organization and a reduction of neurite outgrowths in the trigeminal ganglia
• by E11.5, homozygotes display a reduction of neurite outgrowths in the dorsal root ganglia

respiratory system
• at E10.5, the mutant lung epithelium fails to undergo proper branching; as a result, mutant lungs appear as simple tube-like structures
• however, no morphologic abnormalities are noted in the mesenchymal component
• at E10.5, mutant lungs fail to display branching morphogenesis

digestive/alimentary system
• at E10.5-E11.5, homozygotes display abnormal growth and/or disorganization of the gut epithelium
• at E11.5, homozygotes lack an identifiable large intestine
• at E11.5, homozygotes lack an identifiable stomach

embryo
• at E9.5, homozygotes display hypoplasia of the mandibular arch, the first postoral arch in the branchial arch series
• as early as E9.5, homozygotes display hypoplasia of several organ systems, particularly those of epithelial origin such as the lung and gut
• homozygotes become growth arrested at ~E11.5
• starting at E10.5, homozygotes exhibit progressive growth retardation
• by E11.5, homozygotes are ~40% the size of wild-type embryos
• at E9.5, homozygotes appear thinner in transverse dimension relative to wild-type embryos
• at E11.5, homozygotes exhibit a hypoplastic genital ridge with an irregular, hobnail-like coelomic epithelium
• both the stromal and germ cell components of the genital ridge are severly hypoplastic (~1/10 of wild-type size)
• at E9.5, some (but not all) homozygotes exhibit a slight delay in the initial formation of the mesonephric tubules
• by E11.5, some tubules appear normal while others fail to form or undergo premature degeneration
• at E9.5, some (but not all) homozygotes exhibit a slight delay in the initial formation of the mesonephric duct
• at E9.5, homozygotes exhibit a wavy neuroepithelium and an aberrant ectodermal surface
• by E11.5, the neuroepithelium is thin and lacks architectural complexity

cardiovascular system
• at E11.5, the mutant dorsal aorta is dilated
• at E11.5, homozygotes display a thinned myocardium
• at E11.5, homozygotes are fragile and bleed easily, despite the presence of a beating heart

craniofacial
• at E9.5, homozygotes display hypoplasia of the mandibular arch, the first postoral arch in the branchial arch series

growth/size/body
• starting at E10.5, homozygotes exhibit progressive growth retardation
• by E11.5, homozygotes are ~40% the size of wild-type embryos
• at E9.5, homozygotes appear thinner in transverse dimension relative to wild-type embryos

hematopoietic system
• by E12, homozygotes appear severely anemic

renal/urinary system
• the mesenchyme surrounding the mesonephric tubules is hypoplastic

muscle
• at E11.5, homozygotes display a thinned myocardium




Genotype
MGI:3620014
ht2
Allelic
Composition
Mycntm1Par/Mycn+
Genetic
Background
involves: 129S2/SvPas * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mycntm1Par mutation (1 available); any Mycn mutation (25 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• heterozygotes are present at the expected Mendelian ratio at E18.5 but are significantly under-represented at 3 weeks
• surviving heterozygotes are fertile, healthy and exhibit no differences in size, weight, or lifespan relative to wild-type mice




Genotype
MGI:3620016
ht3
Allelic
Composition
Mycntm1Jrt/Mycntm1Par
Genetic
Background
involves: 129S2/SvPas * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mycntm1Jrt mutation (0 available); any Mycn mutation (25 available)
Mycntm1Par mutation (1 available); any Mycn mutation (25 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• compound heterozygotes start dying at ~E12.5, when 12 out of 42 mutants are found to be dead and necrotic
• no live compound heterozygotes are obtained after E14.5

cardiovascular system
• at E12.5, compound heterozygotes with an edematous neck area exhibit massively dilated jugular veins, indicating cardiac dysfunction
• however, no other major veins are shown to exhibit significant dilation
• at E12.5, compound heterozygotes show a thin subepicardial layer in the ventricular myocardium; the atrial myocardium and inner trabecular layer of ventricles are less severly affected
• at E12.5, the mutant subepicardial ("compact") layer has failed to grow and is as thick as at E10.5
• at E12.5, compound heterozygotes display a thinned myocardium relative to wild-type mice
• at E12.5 and E14.5, compound heterozygotes fail to exhibit proliferation in the subepicardial ("compact") layer of the ventricular myocardium

respiratory system
• at E12.5, compound heterozygotes display an exacerbated branching defect in the lung epithelium relative to Mycntm1Jrt homozygotes, as shown by absence of tertiary branching

homeostasis/metabolism
• at E12.5, 23 out of 42 compound heterozygotes display a large edema in the neck area
• all compound heterozygotes surviving to E14.5 show an edematous neck area

embryo
• at E12.5, 2 out of 42 compound heterozygotes are slightly smaller than wild-type embryos

renal/urinary system
• compound heterozygotes that survive to E14.5 exhibit small but structurally normal kidneys relative to wild-type mice

growth/size/body
• at E12.5, 2 out of 42 compound heterozygotes are slightly smaller than wild-type embryos
• all compound heterozygotes surviving to E14.5 are smaller than wild-type embryos

muscle
• at E12.5, compound heterozygotes show a thin subepicardial layer in the ventricular myocardium; the atrial myocardium and inner trabecular layer of ventricles are less severly affected
• at E12.5, the mutant subepicardial ("compact") layer has failed to grow and is as thick as at E10.5
• at E12.5, compound heterozygotes display a thinned myocardium relative to wild-type mice
• at E12.5 and E14.5, compound heterozygotes fail to exhibit proliferation in the subepicardial ("compact") layer of the ventricular myocardium

nervous system
N
• unlike Mycntm1Par homozygotes, compound heterozygotes do NOT exhibit reduced cranial or spinal ganglia

reproductive system
N
• unlike Mycntm1Par homozygotes, compound heterozygotes do NOT exhibit reduced genital ridges

cellular
• at E12.5 and E14.5, compound heterozygotes fail to exhibit proliferation in the subepicardial ("compact") layer of the ventricular myocardium





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last database update
10/22/2024
MGI 6.24
The Jackson Laboratory