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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Lmnatm1Gbon
targeted mutation 1, Gisele Bonne
MGI:3527206
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Lmnatm1Gbon/Lmnatm1Gbon involves: 129S2/SvPas * C57BL/6 MGI:3527796
ht2
Lmnatm1Gbon/Lmna+ involves: 129S2/SvPas * C57BL/6 MGI:3527795


Genotype
MGI:3527796
hm1
Allelic
Composition
Lmnatm1Gbon/Lmnatm1Gbon
Genetic
Background
involves: 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Lmnatm1Gbon mutation (0 available); any Lmna mutation (84 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• all mutant males died between 4 and 9 months of age while females died between 7 and 13 months of age

behavior/neurological
• both males and females fell earlier from a rotarod compared to wild-type at 6 months of age
• males and females began to show a hunched position and stiff walking posture at 3 months and 6 months of age, respectively
• males and females began to show a stiff walking posture at 3 months and 6 months of age, respectively
• at 6 months of age, spontaneous locomotion tested in an open field was impaired in males but not in females until 8 months of age

cardiovascular system
• myocytes of cardiac muscle had very dark, condensed and irregularly distributed heterochromatin, the nuclear membrane sometimes had deep convolutions with the appearance of intranuclear tubules, and had an accumulation of P-Smad2/3 in nuclei
• left and right ventricles contained single or small clusters of cardiac muscle cells with degeneration and necrosis
• at 2 months of age, males developed a progressive left ventricle dilation but no left ventricle hypertrophy and this defect occurred later (4 months) and progressed less rapidly in females (J:95528)
• increase in left ventricular end-diastolic diameter and left ventricular end-systolic diameter indicating left ventricular dilation (J:187399)
• treatment with ARRY-371797, a highly selective and potent inhibitor of Mapk14, reduces left ventricular end-diastolic diameter and left ventricular end-systolic diameter (J:187399)
• decrease in fractional shortening
• treatment with ARRY-371797, a highly selective and potent inhibitor of Mapk14, increases fractional shortening
• decreased left ventricular shortening indicating a decrease of contractile function
• ventricular extra-systoles were observed in 5 month old males during ECG recordings
• males at 3 months of age showed a significant increase in the PR interval, indicating atrio-ventricular conduction defects
• the QRS complex duration, as a parameter for intraventricular conduction, was significantly increased in 5 month old males
• frequent sinuatrial blocks are observed in 5 month old males during ECG recordings

growth/size/body
• beginning at 3 months of age, males weighed less than controls while females were slightly lighter but only after 6 months of age
• growth rate of males was reduced after 3 months of age, despite normal feeding behavior

homeostasis/metabolism
• 6-8 month old males, but not females, had lower levels of serum glucose but no significant differences in the levels of insulin, low density lipoprotein, uric acids, asparate aminotransferase and alanine aminotransferase
• 6-8 month old females, but not males, had higher triglycerides levels but no significant differences in the levels of insulin, low density lipoprotein, uric acids, asparate aminotransferase and alanine aminotransferase

muscle
• myocytes of cardiac muscle had very dark, condensed and irregularly distributed heterochromatin, the nuclear membrane sometimes had deep convolutions with the appearance of intranuclear tubules, and had an accumulation of P-Smad2/3 in nuclei
• left and right ventricles contained single or small clusters of cardiac muscle cells with degeneration and necrosis
• decrease in fractional shortening
• treatment with ARRY-371797, a highly selective and potent inhibitor of Mapk14, increases fractional shortening
• decreased left ventricular shortening indicating a decrease of contractile function
• moderate quadriceps and triceps abnormalities with myocytes of quadriceps having very dark, condensed and irregularly distributed heterochromatin, the nuclear membrane sometimes had deep convolutions with the appearance of intranuclear tubules, and saw an accumulation of P-Smad2/3 in nuclei
• moderate gastrocnemius abnormalities
• increase of connective tissue in the soleus muscles
• fiber size was variable with increased hypertrophic muscle cells and numerous degenerative fibers
• moderate tibialis abnormalities
• increase of connective tissue in the diaphragm
• fiber size was variable with increased hypertrophic muscle cells and numerous degenerative fibers
• increase of connective tissue in the diaphragm and soleus muscles
• adult mice develop muscular dystrophy
• diaphragm, soleus, gastrocnemius, quadriceps, triceps, and tibialis anterior muscle weakness

respiratory system
• males and females began to exhibit rapid shallow breathing at 3 months and 6 months of age, respectively

limbs/digits/tail
• moderate gastrocnemius abnormalities
• increase of connective tissue in the soleus muscles
• fiber size was variable with increased hypertrophic muscle cells and numerous degenerative fibers
• moderate tibialis abnormalities




Genotype
MGI:3527795
ht2
Allelic
Composition
Lmnatm1Gbon/Lmna+
Genetic
Background
involves: 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Lmnatm1Gbon mutation (0 available); any Lmna mutation (84 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
normal phenotype
• indistinguishable from wild-type with regard to phenotype and life expectancy





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