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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Top2btm2Jcw
targeted mutation 2, James C Wang
MGI:3521850
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Top2btm2Jcw/Top2btm2Jcw 129S6/SvEvTac-Top2btm2Jcw MGI:3521926
cn2
Top2btm2Jcw/Top2btm2.1Jcw
Foxg1tm1(cre)Skm/Foxg1+
involves: 129S4/SvJae * 129S6/SvEvTac * 129X1/SvJ MGI:3521928
cn3
Tg(Dkk3-cre)D9Tfur/0
Top2btm2Jcw/Top2btm2Jcw
involves: 129S6/SvEvTac * C3H * C57BL/6 MGI:6382623


Genotype
MGI:3521926
hm1
Allelic
Composition
Top2btm2Jcw/Top2btm2Jcw
Genetic
Background
129S6/SvEvTac-Top2btm2Jcw
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Top2btm2Jcw mutation (1 available); any Top2b mutation (91 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
normal phenotype




Genotype
MGI:3521928
cn2
Allelic
Composition
Top2btm2Jcw/Top2btm2.1Jcw
Foxg1tm1(cre)Skm/Foxg1+
Genetic
Background
involves: 129S4/SvJae * 129S6/SvEvTac * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Foxg1tm1(cre)Skm mutation (2 available); any Foxg1 mutation (29 available)
Top2btm2.1Jcw mutation (0 available); any Top2b mutation (91 available)
Top2btm2Jcw mutation (1 available); any Top2b mutation (91 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• died of respiratory failure within 30 min after birth, however decreased body size was not observed as in homozygous Top2b mutant mice

behavior/neurological
• lack the vigor of wild-type newborns, however show some body movements upon tactile stimulation

respiratory system
• collapsed lung alveoli in dead pups suggests respiratory failure

nervous system
• ill-defined granule cell layer in the hippocampus
• ill-defined pyramidal cell layer in the hippocampus
• less developed olfactory bulb




Genotype
MGI:6382623
cn3
Allelic
Composition
Tg(Dkk3-cre)D9Tfur/0
Top2btm2Jcw/Top2btm2Jcw
Genetic
Background
involves: 129S6/SvEvTac * C3H * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Tg(Dkk3-cre)D9Tfur mutation (2 available)
Top2btm2Jcw mutation (1 available); any Top2b mutation (91 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
• retina detached from retinal pigment epithelium at age P14 and P21 owing to absence of OS
• virtually no OS by age P14
• m/l-cone outer nuclear layer cells intrude into inner nuclear layer at age P14
• shorter neural processes on s-cones at age P0
• no neural processes on s-cones at age P7 and P14
• outer nuclear layer cells intrude into inner nuclear layer at age P14
• elimination or significant reduction of rhodopsin signal at age P7 and P14
• increased apoptosis in outer nuclear layer at age P7, P14 and P21
• retina detached from RPE at age P14 and P21 owing to absence of outer segment
• at age P7 and P14
• absent at age P7, P14 and P21
• elimination or significant reduction of rhodopsin signal at age P7 and P14

nervous system
• retina detached from retinal pigment epithelium at age P14 and P21 owing to absence of OS
• virtually no OS by age P14
• m/l-cone outer nuclear layer cells intrude into inner nuclear layer at age P14
• shorter neural processes on s-cones at age P0
• no neural processes on s-cones at age P7 and P14
• outer nuclear layer cells intrude into inner nuclear layer at age P14
• elimination or significant reduction of rhodopsin signal at age P7 and P14
• increased apoptosis in outer nuclear layer at age P7, P14 and P21

pigmentation
• retina detached from RPE at age P14 and P21 owing to absence of outer segment





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