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Phenotypes Associated with This Genotype
Genotype
MGI:8270929
Allelic
Composition
Dmdem2Rcn/Y
Genetic
Background
C57BL/6J-Dmdem2Rcn
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Dmdem2Rcn mutation (0 available); any Dmd mutation (167 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
muscle
N
• 12-week-old mice show normal muscle histology, normal muscle function, and exercise-induced damage
• 52-week-old mice show a decrease in contractile force at 75, 100, and 125 Hz after exercise
• 52-week-old, but not 12-week-old, exercised mice show reduced forelimb grip strength and contractile force indicating a fatigued phenotype

cardiovascular system
N
• mice exhibit normal heart rate throughout 12 to 52 weeks of age, with normal ejection fraction and fractional shortening
• a small, but significant, increase in posterior wall thickness during diastole is seen at 12 weeks of age and a decrease in end diastolic diameter is seen at 28 weeks of age
• however, mice show normal echocardiography, with similar posterior wall thickness during systole, systolic volume, diastolic volume and end systolic diameter, throughout 12-52 weeks of age

homeostasis/metabolism
• forelimb grip strength after exercise is lower at 52 weeks of age but not at 12 weeks of age
• 52-week-old mice show a decrease in contractile force at 75, 100, and 125 Hz after exercise
• however, performances in open-field parameters are similar to wild-type mice pre- and post-exercise

behavior/neurological
• forelimb grip strength after exercise is lower at 52 weeks of age but not at 12 weeks of age

growth/size/body
N
• 12-week-old mice show normal weight

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
Becker muscular dystrophy DOID:9883 OMIM:300376
J:376007


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
12/30/2025
MGI 6.24
The Jackson Laboratory